Window system for a building

• US 5,226,256 A
• Filed: 03/10/1992
• Issued: 07/13/1993
• Est. Priority Date: 05/12/1989
• Status: Expired due to Fees

• Current Assignee: AUG Winkhaus GmbH & Company KG
• Original Assignee: AUG Winkhaus GmbH & Company KG
• Inventors: Fries, Wolfgang, Renz, Dieter, Greisner, Paul
• Primary Examiner(s): Cuomo, Peter M.
• Assistant Examiner(s): REDMAN, JERRY E
• Application Number:
  US07/850,007
• Time in Patent Office: 490 Days
• Field of Search: 49/13, 49/14, 49/21, 49/24, 49/29, 49/30, 49/31, 49/125, 49/138, 49/192, 307/116, 307/118
• US Class Current: 49/13
• CPC Class Codes: E05B 2047/0023 Nuts or nut-like elements moving along a driven threaded axle
• CPC Class Codes: E05B 2047/0068 Door closed
• CPC Class Codes: E05B 2047/0069 bolt position
• CPC Class Codes: E05B 47/0012 with rotary electromotors actuators with rotary electromotors per se H02K7/06, H02K23/68
• CPC Class Codes: E05B 63/0069 Override systems, e.g. allowing opening from inside without the key, even when locked from outside E05B65/1086, E05B9/105 take precedence; by movable striker E05B63/246
• CPC Class Codes: E05C 9/02 with one sliding bar for fastening when moved in one direction and unfastening when moved in opposite direction; with two sliding bars moved in the same direction when fastening or unfastening
• CPC Class Codes: E05C 9/24 Means for transmitting movements between vertical and horizontal sliding bars, rods or cables for the fastening of wings, e.g. corner guides means for transmitting movements between vertical and horizontal sliding bars, rods or cables, for moving wings into open or closed position E05F7/08
• CPC Class Codes: E05D 15/52 for opening about a vertical as well as a horizontal axis
• CPC Class Codes: E05F 15/622 using screw-and-nut mechanisms
• CPC Class Codes: E05F 15/63 operated by swinging arms
• CPC Class Codes: E05F 15/71 responsive to temperature changes, rain, wind or noise
• CPC Class Codes: E05F 15/72 responsive to emergency conditions, e.g. fire
• CPC Class Codes: E05F 15/77 using wireless control
• CPC Class Codes: E05Y 2201/214 Disengaging means
• CPC Class Codes: E05Y 2201/24 using lost motion
• CPC Class Codes: E05Y 2201/434 Electromotors; Details thereof
• CPC Class Codes: E05Y 2201/604 Transmission members
• CPC Class Codes: E05Y 2201/626 Levers
• CPC Class Codes: E05Y 2400/302 during electromotoric braking
• CPC Class Codes: E05Y 2400/40 Control units therefore
• CPC Class Codes: E05Y 2400/42 : for multiple openings
• CPC Class Codes: E05Y 2400/652 : by bus
• CPC Class Codes: E05Y 2600/46 : in or on the wing
• CPC Class Codes: E05Y 2800/00 : Details, accessories and auxiliary operations not otherwise provided for
• CPC Class Codes: E05Y 2800/21 : of identical elements, e.g. of identical compression springs
• CPC Class Codes: E05Y 2800/422 : against vibration or noise
• CPC Class Codes: E05Y 2800/70 : Retrofitting of elements
• CPC Class Codes: E05Y 2900/148 : Windows
• CPC Class Codes: F24F 11/0001 : for ventilation F24F11/30 takes precedence
• CPC Class Codes: F24F 11/30 : for purposes related to the operation of the system, e.g. for safety or monitoring
• CPC Class Codes: F24F 11/56 : Remote control
• CPC Class Codes: F24F 11/63 : Electronic processing
• CPC Class Codes: F24F 2007/004 : Natural ventilation using convection
• CPC Class Codes: F24F 2110/20 : Humidity
• CPC Class Codes: F24F 2110/50 : Air quality properties
• CPC Class Codes: F24F 2140/40 : Damper positions, e.g. open or closed
• CPC Class Codes: Y02B 30/70 : Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

A window system is proposed in which windows (41) which can be both locked and tilted mechanically are connected via microprocessors (43) to a monitoring center (49) which can display the locking and closure status of the individual windows (41) via visual display units (51, 57). The microprocessors (43) are located in the vicinity of the windows (41) and connected to the receiver (61) of a radio-controlled remote control unit by which the windows can be remotely controlled. The windows (41) can also be controlled via an operating unit (65) in the monitoring center (49). The remote control unit may involve either portable transmitters (63) or transmitters with a fixed location (67) which control the windows (41) via sensors (69) as a function of ambient air parameters, such as the relative air humidity, temperature or the CO₂ content of the air in the room. The windows (41) have a locking drive integrated in the handle and a separate tilting drive. A central blocking device which blocks the microprocessors (43) permits central blocking of individual windows or of all the windows in the system.

Claims

1. Window system for a building with several windows (41) each comprising an outer frame (1) and a vent frame (7) mounted to pivot on the outer frame (1), each window having a manually operable lock fitting (11, 25), in particular a turn-and-tilt lock fitting releasing the vent frame (7) either about a vertical axis (3) for a turning pivoting movement or about a horizontal axis (5) for a tilting pivoting movement, and a motor arrangement (31, 33) driving both the lock fitting (11, 25) and the vent frame (7) in its pivoting movement, and with a control system (43, 49) for the motor drive (31, 33),

wherein each window (41) is equipped with a sensor arrangement (37, 39;

85, 87;

89-97;

101, 103;

163;

     197) detecting the pivoting position of the vent frame (7) and/or the locking position of the lock fitting (11,

     25),

wherein a microprocessor (43) is allocated and situated in the vicinity of each window (41) or each group of spatially adjacent windows (41), the microprocessor being connected to the sensor arrangement (37, 39;

85, 87;

89-97;

101, 103;

163;

     197) and the motor arrangement (31,

     33) of each of the windows (41) allocated to it,

wherein the microprocessor (43) is connected to a remote control device (61, 63,

     67) by means of which the motor arrangement (31,

     33) of each of the windows (41) allocated to the microprocessor (43) can be controlled at a distance from the microprocessor, and wherein several of the microprocessors (43) are connected in particular via a control circuit, and in particular a ring circuit (47), to a joint monitoring center (49) located at a distance from them, on which the pivoting and/or locking positions of the windows (41) detected using the sensor arrangements (37, 39;

85, 87;

89-97;

101, 103;

163;

     197) can be displayed either individually or in groups using a visual display unit (51,

     57),

the motor arrangement (31,

     33) comprises a locking motor (31) driving the lock fitting (11,

     25) and a separate vent frame pivoting motor (33) driving the pivoting movement, in particular the tilting pivoting movement, of the vent frame (7) and wherein the microprocessor (43) switches on the motors (31,

     33) of the motor arrangement (31,

     33) in series, with the locking motor (31) in the unlocking direction first followed by the vent frame pivoting motor (33) in the opening direction for the opening movement and with the vent frame pivoting motor (33) in the closing direction followed by the locking motor (31) in the locking direction for the closing movement.

2. Window system in accordance with claim 1, wherein both the locking motor (31) and the vent frame pivoting motor (33) have limit switches (163, 197) allocated to them which detect the locking position and the unlocking position which permits the vent frame (7) to be pivoted, on the one hand, and the closed and open positions of the vent frame (7), on the other, and wherein the microprocessor (43) responds to the limit switches (163, 197) and exerts active electrical braking on each of the individual motors (31, 33) when the allocated limit switch (163, 197) is actuated.

3. Window system in accordance with claim 1, wherein a central operating unit (65) is connected to the monitoring center (49), this in turn being controllable via a remote control unit (59), in particular a radio-controlled remote control unit, a remote data transmission unit or a voice control unit.

4. Window system in accordance with claim 1, wherein each motor arrangement (31, 33) is allocated an over-current monitoring circuit (43) which generates a monitoring signal representing the blocking of the motor arrangement (31, 33) if a pre-set value for the motor current is exceeded and wherein the monitoring center displays the occurrence of the monitoring signal selectively allocated to the window (41) or group of windows (41).

5. Window system in accordance with claim 4, wherein the over-current monitoring circuit (43), in particular a microprocessor (43), generates the monitoring signal if the preset value of the motor current is exceeded for a preset period monitored by the over-current monitoring circuit and switches off the motor arrangement (31, 33) after the preset period has elapsed.

6. Window system for a building with several windows (41) each comprising an outer frame (1) and a vent frame (7) mounted to pivot on the outer frame (1), each window having a manually operable lock fitting (11, 25), in particular a turn-and-tilt lock fitting releasing the vent frame (7) either about a vertical axis (3) for a turning pivoting movement or about a horizontal axis (5) for a tilting pivoting movement, and a motor arrangement (31, 33) driving both the lock fitting (11, 25) and the vent frame (7) in its pivoting movement, and with a control system (43, 49) for the motor drive (31, 33),

wherein each window (41) is equipped with a sensor arrangement (37, 39;

85, 87;

89-97;

101, 103;

163;

     197) detecting the pivoting position of the vent frame (7) and/or the locking position of the lock fitting (11,

     25),

wherein a microprocessor (43) is allocated and situated in the vicinity of each window (41) or each group of spatially adjacent windows (41), the microprocessor being connected to the sensor arrangement (37, 39;

85, 87;

89-97;

101, 103;

163;

     197) and the motor arrangement (31,

     33) of each of the windows (41) allocated to it,

wherein the microprocessor

     943) is connected to a remote control device (61, 63,

     67) by means of which the motor arrangement (31,

     33) of each of the windows (41) allocated to the microprocessor (43) can be controlled at a distance from the microprocessor, and wherein several of the microprocessors (43) are connected in particular via a control circuit, and in particular a ring circuit (47), to a joint monitoring center (49) located at a distance from them, on which the pivoting and/or locking positions of the windows (41) detected using the sensor arrangements (37, 39;

85, 87;

89-97;

101, 103;

163;

     197) can be displayed either individually or in groups using a visual display unit (51,

     57),

the remote control unit (61, 63,

     67) comprises a radio-controlled transmitter (63,

     67), in particular an infrared transmitter, and a receiver (61) connected to the microprocessor (43) in particular an infrared receiver, the monitoring center (49) includes a central operating unit (65) by means of which the motor arrangements (31,

     33) of the windows (41) or groups of windows (41) allocated to the microprocessors (43) can be selectively controlled in the locking position against control via the remote control units (61, 63,

     67) allocated to the microprocessors (43), wherein the lock fitting consists of a drive rod arrangement (11) laid in a rebated peripheral surface of the vent frame (7) and movable in the direction of the periphery of the vent frame (7), wherein a blocking device (207,

     221) blocking the drive rod arrangement (11) in its locking position is provided on the vent frame, the blocking device (207,

     221) comprising a bolt (207) pre-tensioned by a spring (219) into its blocking position and an electromagnet (221) working against the force of the spring (219) releasing the drive rod arrangement (11), and wherein the electromagnet (221) can be excited via the microprocessor (43,), wherein the bolt is designed as a pivoting angle catch (207) mounted on a support section (205) of the blocking device (207,

     221) which holds the electromagnet (221), the free end of one of the arms (211) of this angle catch (207) engaging in a recess (217) of a drive rod (215) when the drive rod arrangement (11) is in the locking position, the other arm (225), running transverse to the drive rod (215), being exposed to the action of the electromagnet (221).

7. Window system for a building, comprising several windows (41) each having an outer frame (1) and a vent frame (7) mounted to pivot on the outer frame (1), each window having a manually operable lock fitting (11, 25), in particular a turn-and-tilt lock fitting releasing the vent frame (7) either about a vertical axis (3) for a turning pivoting movement or about a horizontal axis (5) for a tilting pivoting movement, said fitting comprising a drive rod arrangement (11) laid in a grooved peripheral surface of the vent frame, at least partially concealed and movable in the direction of the periphery of the vent frame (7), wherein the drive rod arrangement (11) of each window has a drive connection with a two-part position sensor arrangement comprising a first sensor element (37;

85;

89, 97;

101;

147;

     177) and a second sensor element (39;

87;

91, 93, 95;

103;

163;

     197) which are connected in a fixed fashion to one of the vent frame (7) and the outer frame (1), respectively

wherein the position sensor arrangement generates a first signal upon alignment of its sensor elements and a second signal in the absence of alignment,

and wherein the position sensor arrangements of the windows (41) are connected to a joint monitoring center (49) which can display using a visual display unit (51,

     57) whether the first or second signal from the position sensor arrangement is present for at least one of the windows (41) with respect to each individual window (41) or to groups of windows (41), the position sensor arrangement is designed as a push rod contact arrangement (101,

     103) with a push rod contact section (101) attached to the vent frame (7) in such a way as to be movable transverse to the peripheral surface of the vent frame (7) and an opposite contact (103) located on the outer frame (1),

wherein the push rod contact section (101) is coupled to a drive rod (115) from the drive rod arrangement (11) via a wedge-type mechanism (117,

     121) and emerges towards the opposite contact element (103) when the drive rod arrangement (11) is in the locking position through an aperture (107) in a vent frame (7) face plate (105) covering the drive rod (115) and through an aperture (127) in the drive rod (115) which is flush with the face plate aperture (107) when the drive rod (115) is in the locking position, and wherein the push rod contact section (101) is also lifted out of the movement track of the drive rod (115) when the drive rod arrangement (11) is in the unlocking position which permits the vent frame (7) to pivot and that the aperture (127) in the drive rod (115) is of a size such that in the unlocking position it conceals the aperture (107) in the face plate (105), wherein the push rod contact section (101) is located on a lever element (109) running along the face plate (105) and connected by a joint to a spindle (113) roughly parallel to the fax plate (105),

and wherein the wedge-type mechanism (117,

     121) is formed by a cam surface of the lever element (109) and a cam counter-surface of a cam element (117) connected in a fixed fashion to the drive rod (115), wherein the lever element (109) is designed as a dual-arm lever, in that the cam surface working in conjunction with the cam element (117) extends over both lever arms (117,

     119) and in that the cam surfaces of the two lever arms (117,

     119) include an obtuse angle.

8. Window system, for a building, comprising several windows (41) each having an outer frame (1) and a vent frame (7) mounted to pivot on the outer frame (1), each window having a manually operable lock fitting (11, 25), in particular a turn-and-tilt lock fitting releasing the vent frame (7) either about a vertical axis (3) for a turning pivoting movement or about a horizontal axis (5) for a tilting pivoting movement, said fitting comprising a drive rod arrangement (11) laid in a grooved peripheral surface of the vent frame, at least partially concealed and movable in the direction of the periphery of the vent frame (7), wherein the drive rod arrangement (11) of each window has a drive connection with a two-part position sensor arrangement comprising a first sensor element (37;

85;

89, 97;

101;

147;

     177) and a second sensor element (39;

87;

91, 93, 95;

103;

163;

     197) which are connected in a fixed fashion to one of the vent frame (7) and the outer frame (1), respectively

wherein the position sensor arrangement generates a first signal upon alignment of its sensor elements and a second signal in the absence of alignment

and wherein the position sensor arrangements of the windows (41) are connected to a joint monitoring center (49) which can display using a visual display unit (51,

     57) whether the first or second signal from the position sensor arrangement is present for at least one of the windows (41) with respect to each individual window (41) or to groups of windows (41), the position sensor arrangement is designed as a push rod contact arrangement (101,

     103) with a push rod contact section (101) attached to the vent frame (7) in such a way as to be movable transverse to the peripheral surface of the vent frame (7) and an opposite contact (103) located on the outer frame (1),

wherein the push rod contact section (101) is coupled to a drive rod (115) from the drive rod arrangement (11) via a wedge-type mechanism (117,

     121) and emerges towards the opposite contact element (103) when the drive rod arrangement (11) is in the locking position through an aperture (107) in a vent frame (7) face plate (105) covering the drive rod (115) and through an aperture (127) in the drive rod (115) which is flush with the face plate aperture (107) when the drive rod (115) is in the locking position, and wherein the push rod contact section (101) is also lifted out of the movement track of the drive rod (115) when the drive rod arrangement (11) is in the unlocking position which permits the vent frame (7) to pivot and that the aperture (127) in the drive rod (115) is of a size such that in the unlocking position it conceals the aperture (107) in the face plate (105),

wherein the push rod contact section (101) is located on a lever element (109) running along the face plate (105) and connected by a joint to a spindle (113) roughly parallel to the fax plate (105),

and wherein the wedge-type mechanism (117,

     121) is formed by a cam surface of the lever element (109) and a cam counter-surface of a cam element (117) connected in a fixed fashion to the drive rod (115), wherein the lever element (109) is designed as a dual-arm lever, in that the cam surface working in conjunction with the cam element (117) extends over both lever arms (117,

     119) and in that the cam surfaces of the two lever arms (117,

     119) include an obtuse angle,

wherein the lever element (109) has elastic spring properties in at least one partial section between the push rod contact element (101) and the joint.

9. Window system for a building with a window comprising an outer frame (1) and a vent frame (7) mounted to pivot on the outer frame (1), having a manually operable lock fitting (11, 25), in particular a turn-and-tilt lock fitting releasing the vent frame (7) either about a vertical axis (3) for a turning pivoting movement or about a horizontal axis (5) for a tilting pivoting movement, the lock fitting (11, 25) comprising a drive rod arrangement (11) laid in a rebated peripheral surface of the vent frame (7) and movable in the direction of the periphery of the vent frame (7) and a manual turning handle (13) with a drive connection to the drive rod arrangement (11) via drive rod gearing, the manual turning handle (13) being pivot-mounted on a handle base section (131) attached in a fixed fashion to the vent frame (7),

with an electric motor (137) connected to form a single unit with the manual turning handle (13), which drives a driven spindle (153) located in the handle in a rotating fashion relative to the manual turning handle (13) via gearing (139, 141) in the handle which is self-locking on rotation from the power take-off side, the driven spindle (153) being coupled to the drive rod gearing and coaxial with the axis of rotation of the manual turning handle (13), and with a manually detachable torque support coupling (159, 161) between the manual turning handle (13) and the handle base section (131),

wherein the manual turning handle is designed as a lever handle (135),

wherein the self-locking gearing comprises a spindle pinion (139) with a threaded spindle (143) driven by the motor (137), the axis of which is transverse to the axis of rotation (15A) of the lever handle (135) and located in the longitudinal lever direction of the lever handle (135) and with a spindle nut (147) which is connected to a rack (9) in the lever handle (135) and guided in a movable fashion along the threaded spindle (143) and which meshes with a pinion (151) seated on the driven spindle (153) wherein the torque support coupling is designed as a bolt (159) guided in a movable fashion on the lever handle (135) and in particular is located at that end of the lever handle (135) away from the axis of rotation, the bolt (159) being connected to a finger key (155).

10. Window system for a building with at least one window comprising an outer frame (1) and a vent frame (7) mounted to pivot on the outer frame (1), having a lock fitting (11, 25) which can be adjusted by at least one of manually and a motor arrangement (31, 33), in particular a turn-and-tilt lock fitting releasing the vent frame either about a vertical axis (3) for a turning pivoting movement or about a horizontal axis (5) for a tilting pivoting movement, the lock fitting (11, 25) comprising a drive rod arrangement (11) laid in a rebated peripheral surface of the vent frame (7) and movable in the direction of the periphery of the vent frame (7),

and with pivoting drive (33) for the vent frame (7) attached in a fixed fashion to the outer frame (1) and including an electric motor (169),

wherein a stay-type lever (35) is mounted on bearings on a spindle (181) which is basically parallel to the plane surface of the outer frame (1) on a support (167) in the pivoting drive (33) which carries the electric motor (169), this lever (35) being linked at the end away from the spindle (181) with a drive rod (195) from the drive rod arrangement (11) via a detachable self-aligning coupling (191, 193) and being driven by the electric motor (169) via gearing (171) between a position which closes the window, in which the stay-type lever (35) runs basically in the direction of the periphery of the outer frame (1), and a position which opens the window, in which the stay-type lever (35) runs at an angle to the direction of the periphery,

wherein the self-aligning coupling (191, 193) comprises a first coupling section (193) in the form of a longitudinally extended rail section and a second coupling section (191) in the form of a slide which can be pushed along the rail section,

and wherein one of the coupling sections (191, 193) is connected in a fixed fashion to the drive rod (195) and, when the stay-type lever (35) is in the closed position with the lock fitting (11, 25) locked does not engage with the other of the two coupling sections (191) attached to the stay-type lever (35) and engages with the other coupling section (191) only in the drive rod position designed for mechanical pivoting operation, wherein the gearing is designed as a spindle drive (171) with a threaded spindle (173) extending in the direction of the periphery of the outer frame (1) and driven by the electric motor (169) and with a spindle nut (177) at a distance from the pivoting axis of the stay-type lever (35) and connected to the latter in a flexible manner, wherein the support is designed as a housing (167) surrounding the electric motor (169) and the spindle drive (171)

wherein the spindle nut (177) is guided along opposite walls of the housing (167) such that it cannot be twisted but can be moved parallel to the spindle

wherein the spindle (181) of the stay-type lever (35) passes through an opening (179) in the spindle nut and is attached to the housing (167) on both sides of the spindle nut (177), and

wherein the electric motor (169) is attached to the support frame (167) with its shaft on a parallel axis to that of the threaded spindle (173).

11. Window system in accordance with claim 10, wherein one limit switch (197) is located on the support (167) on each of the axially opposite sides of the threaded spindle (173) and can be actuated by the spindle nut (177) to control the electric motor (169).

12. Window system for a building, comprising several windows (41) each having an outer frame (1) and a vent frame (7) mounted to pivot on the outer frame (1), each window having a manually operable turn-and-tilt lock fitting (11, 25) releasing the vent frame (7) either about a vertical axis (3) for a turning pivoting movement or about a horizontal axis (5) for a tilting pivoting movement, said fitting comprising a drive rod arrangement (11) laid in a grooved peripheral surface of the vent frame, at least partially concealed and movable in the direction of the periphery of the vent frame (7), wherein the drive rod arrangement (11) is fitted with at least one bolt peg (15) projecting toward the outer frame (1) and engaging in a locked position of the window in a locking plate (19) associated with the outer frame (1);

wherein each window has a position sensor arrangement comprising a magnet (85) attached to the bolt peg (15) and movable with the drive rod arrangement (11) in the direction of the periphery of the vent frame (7), and a magnet field sensor (87), in particular, a Hall-effect switch located on the locking plate (19), said magnetic field sensor (87), in the locked position of the window (41), in response to engagement of the magnet (85) together with the bolt peg (15) in the locking plate (19), generating a first signal, and the magnetic field sensor (85) generating a second signal in a disengaged position of the bolt peg (15); and

wherein the position sensor arrangement of each window (41) is connected to a joint monitoring center (49) which can display using a visual display unit (51,

     57) whether the first or second signal is present for each individual window (41) or groups of windows (41).

13. Window system in accordance with claim 12, in which the lock fitting (11, 25) comprises a corner bearing (9) which guides the vent frame (7) during the turn-and-tilt movement and which is situated diagonally opposite a drive rod corner drive (79, 83) in the vicinity of an upper corner of the vent frame (7),

wherein the position sensor arrangement (85, 87) is fitted in the vicinity of the drive rod corner drive (79, 83) diagonally opposite the corner bearing (9).

14. Window system for a building, comprising several windows (41) each having an outer frame (1) and a vent frame (7) mounted to pivot on the outer frame (1), each window having a manually operable lock fitting (11, 25), in particular a turn-and-tilt lock fitting releasing the vent frame (7) either about a vertical axis (3) for a turning pivoting movement or about a horizontal axis (5) for a tilting pivoting movement, said fitting comprising a drive rod arrangement (11) laid in a grooved peripheral surface of the vent frame, at least partially concealed and movable in the direction of the periphery of the vent frame (7),

wherein each window (41) is provided with several position sensor arrangements of which a first position sensor arrangement (95, 97) responds to the locked petition of the vent frame (7), a second position sensor arrangement (89, 91) responds to the locking position of the drive rod arrangement (11), and a third position sensor arrangement (89, 93) responds to the unlocking position of the drive rod arrangement (11) which permits the pivoting movement of the vent frame (7), each of the first, second and third arrangements comprising a magnet (89, 95) and a magnet field sensor, in particular, a Hall-effect switch (91, 93, 97) generating, upon alignment with the magnet, a first signal, and a second signal in the absence of alignment;

wherein at least one of the position sensor arrangements of each window (41) is connected to a joint monitoring center (49) which can display using a visual display unit (51,

     57) whether the first or second signal is present for each individual window (41) or groups of windows; and

wherein the magnetic field sensors of the second (89,

     91) and third position sensor arrangements are located within the vent frame (7), and the magnets of the second (89,

     91) and third (89,

     93) position sensor arrangement are formed by a common magnet (89) attached to the drive rod arrangement (11) and displaceable therewith in the direction of the periphery of the vent frame (7).

15. Window system in accordance with claim 14, in which the lock fitting (11, 25) comprises a corner bearing (9) which guides the vent frame (7) during the turn-and-tilt movement and which is situated diagonally opposite a drive rod corner drive (79, 83) in the vicinity if an upper corner of the vent frame (7),

wherein the several position sensor arrangement (89-97) are fitted in the vicinity of the drive rod corner drive (79, 83) diagonally opposite the corner bearing (9).