Window operator control

• US 5,449,987 A
• Filed: 09/24/1993
• Issued: 09/12/1995
• Est. Priority Date: 09/24/1993
• Status: Expired due to Fees

• Current Assignee: Truth Hardware Corporation (Tyman Plc)
• Original Assignee: Truth Division SPX Corporation
• Inventors: McMillan, Scott D.
• Primary Examiner(s): Shoop, Jr., William M.
• Assistant Examiner(s): Sircus, Brian
• Application Number:
  US08/126,260
• Time in Patent Office: 718 Days
• Field of Search: 318/280-286, 318/265, 318/266, 318/466-469, 49/26, 49/29, 49/30, 49/138, 160/29, 160/291, 160/292, 160/293.1, 160/296
• US Class Current: 318/266
• CPC Class Codes: E05F 15/41 Detection by monitoring transmitted force or torque E05F15/48 takes precedence; Safety couplings with activation dependent upon torque or force, e.g. slip couplings
• CPC Class Codes: E05F 15/71 responsive to temperature changes, rain, wind or noise
• CPC Class Codes: E05Y 2400/40 Control units therefore
• CPC Class Codes: E05Y 2400/42 for multiple openings
• CPC Class Codes: E05Y 2400/61 Power supply
• CPC Class Codes: E05Y 2800/21 of identical elements, e.g. of identical compression springs
• CPC Class Codes: E05Y 2900/148 Windows
• CPC Class Codes: G05B 19/042 using digital processors G05B19/05 takes precedence
• CPC Class Codes: G05B 2219/25188 Superposition high frequency data signal on power lines, current carrier
• CPC Class Codes: G05B 2219/2642 Domotique, domestic, home control, automation, smart house
• CPC Class Codes: G05B 2219/36467 Teach and store time needed from open to closed and closed to open position
• CPC Class Codes: G05B 2219/37285 Load, current taken by motor
• CPC Class Codes: G05B 2219/37624 Detect collision, blocking by measuring change of velocity or torque
• CPC Class Codes: G05B 2219/41142 Compensation of servocontrol signals as function of changing supply voltage
• CPC Class Codes: G05B 2219/45242 Door, panel, window operation, opening, closing
• CPC Class Codes: G05D 3/10 without using feedback
• CPC Class Codes: H02H 7/0851 for motors actuating a movable member between two end positions, e.g. detecting an end position or obstruction by overload signal
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y04S 20/20 End-user application control systems

Abstract

An improved window operator has an electrically controlled drive for moving a window between opened and closed positions in response to a command. A plurality of switches are provided for manually or remotely commanding movement of the drive to move the window to a select desired position between the opened and closed positions. A position sensing routine senses actual position of the window between the open and closed positions. The position sensing routine includes a timer for storing a value representing actual position. The value is selectively incremented or decremented at a select rate in response to duration of operation of the drive to move the window between the open and closed positions. The control senses electrical power supplied to the drive. An adjustment routine adjusts the select rate of the timer in response to electric power deviating from a select desired power level. The control compare the desired position to actual position and controls an output coupled to the drive for developing an electrical signal to control the drive in response to a difference between the select and actual positions to minimize the difference.

Claims

1. In a window operator having an electrically controlled drive for moving a window between open and closed positions in response to a command, the improvement comprising:

means for commanding movement of the drive to move the window to a select desired position between the open and closed positions;

position sensing means for sensing actual position of the window between the open and closed positions, comprising a timer means for storing a value representing actual position, the value being selectively incremented or decremented at a select rate in response to duration of operation of the drive to move the window between the open and closed positions;

supply sensing means for sensing electrical power supplied to the drive;

adjustment means operatively associated with said position sensing means and said supply sensing means for adjusting the select rate of said timer means in response to electrical power deviating from a select desired power level; and

a control coupled to said commanding means and said position sensing means including comparing means for comparing said desired position to said actual position and output means coupled to said drive for developing an electrical signal to control said drive responsive to a difference between said select and actual positions to minimize said difference.

2. The improvement of claim 1 wherein said drive comprises a motor controlled drive.

3. The improvement of claim 2 wherein said output means comprises a bridge circuit for controlling polarity of power supplied to the motor dependent on desired direction of movement of the window.

4. The improvement of claim 1 wherein said adjustment means decreases the select rate in response to decreases in sensed power and increases the select rate in response to increases in sensed power.

5. The improvement of claim 1 wherein said supply sensing means senses line voltage supplied to the drive.