Shutter-time-preference single lens reflex camera with automatic film wind-up

• US 4,015,198 A
• Filed: 12/18/1974
• Issued: 03/29/1977
• Est. Priority Date: 12/26/1973
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Ito, Tadashi, Aizawa, Hiroshi, Uchidoi, Masanori, Kozuki, Susumu, Iwashita, Tomonori, Iura, Yukio
• Primary Examiner(s): Hix, L. T.
• Assistant Examiner(s): LaBarre, J. A.
• Application Number:
  US05/534,151
• Time in Patent Office: 832 Days
• Field of Search: 354/29, 354/30, 354/43, 354/44, 354/234, 354/235, 354/170, 354/173
• US Class Current: 396/245
• CPC Class Codes: G03B 17/425 motor drive cameras
• CPC Class Codes: G03B 19/12 Reflex cameras with single objective and a movable reflector or a partly-transmitting mirror
• CPC Class Codes: G03B 7/085 for control of aperture

Abstract

In a shutter-time-preference single lens reflex camera, in which the shutter time control is done with a predetermined shutter time, and diaphragm value is determined by an output information of a photometric means which measures a transmission light of a photographing lens and the above predetermined shutter time information, a camera actuating means provided in the camera body is put into operation through a magnet means provided in the camera body so that the aperture of the photographing is controlled in accordance with the above predetermined diaphragm value, and then the shutter time control is performed. Further, the camera includes an electric driving device and the driving of the electric driving device is controlled by a safety switch which, in turn, is controlled for its ON and OFF conditions by the completion of the exposure operations such as the operation of the shutter rear screen.

Claims

1. A shutter time preference single lens reflex camera having an electric driving device, which comprises in combination;

1. a camera body having,

a. a photographing lens having a diaphragm device,

b. means for measuring transmitted light of the photographing lens,

c. photographing information setting means having shutter time setting means,

d. computation means for computing the output of the photometric means and the output of the photographing information setting means,

e. diaphragm control means for controlling the operation of the diaphragm device, which means determines the diaphragm aperture of the diaphragm device in correspondence to the output computation of the computation means,

f. time control means for controlling shutter time in correspondence to the value set by the shutter time setting means,

g. means for actuating the diaphragm control means and the time control means, which starts the time control means after the start of the diaphragm control means,

h. magnetic release means for driving the actuating means,

i. a first switching means for controlling conductivity of the magnetic release means,

j. operation means for controlling "on" and "off" of the switching means,

k. film winding means for charging the time control means and the diaphragm control means, and

l. a second switching means for controlling conductivity of the time control means, the diaphragm control means and the magnetic release means, which second switching means is made "off" by the completion of the operation of the time control means and is made "on" by the completion of the charge, and

2.

2. an electric driving device comprising,

a. winding driving means which engages with the winding means,

b. control means for controlling the winding driving of the driving means, which control means operates while the second switching means is "off," and does not operate while the second switching means is "on," and

c. a third switching means connected in parallel to the first switching

4. A camera according to claim 2, in which the third switching means is composed of a relay which is excited by a release signal from the electric driving device and a relay contact which is connected in parallel to the first switching means and is closed when the relay is excited.

3. means, which controls conductivity of the magnetic release means. 2. A shutter time preference single lens reflex camera attachable with an electric driving device comprising:

a photographing lens having a diaphragm device;

photometric means for measuring transmission light of the photographing lens;

means for setting photographing information having means for setting shutter time;

means for computing the output of the photometric means and output of the photographing information setting means;

diaphragm control means for controlling the operation of the diaphragm device, which determines the aperture of the diaphragm device, in correspondence to the output computation of the computing means;

means for controlling the shutter time in correspondence to the value set by the shutter time setting means;

means for actuating the diaphragm control means and the time control means;

a magnetic release means for driving the actuating means;

a first switching means for controlling conductivity of the magnetic release means;

operation means for controlling the "on" and "off" states of the switching means;

a film winding-up means, said means being functional for charging said time control means as well as said diaphragm control means;

a second switching means for controlling the drive of an electric driving device, said means being functional for maintaining said device under the first state wherein said device is maintained in a driving condition during the period between the completion of operation and the completion of charging of said time control means and also for maintaining said electric driving device under the second state wherein said device is maintained inoperative during the period between the completion of charging and the completion of operation of said time control means;

means for transmitting the first and the second states of said second switching means to said electric driving device, said transmitting means being provided with a terminal to be connected with said device which further comprises a third switching means which is connected in parallel with the first switching means, controls the conductivity of the magnetic release means, and is closed by a release signal from the electric driving device.

5. A shutter time preference single lens reflex camera having an electric driving device, which comprises:

a camera body having,

a. a photographing lens having a diaphragm device,

b. means for measuring transmitted light of the photographing lens,

c. photographing information setting means having shutter time setting means,

d. computation means for computing the output of the photometric means and the output of the photographing information setting means,

e. diaphragm control means for controlling the operation of the diaphragm device, which means determines the diaphragm aperture of the diaphragm device in correspondence to the output computation of the computation means,

f. time control means for controlling shutter time in correspondence to the value set by the shutter time setting means,

g. means for actuating the diaphragm control means and the time control means,

h. magnetic release means for driving the actuating means,

i. a first switching means for controlling conductivity of the magnetic release means,

j. operation means for controlling "on" and "off" of the switching means,

k. film winding means for charging the time control means and the diaphragm control means,

l. a second switching means for controlling the action of said electric driving device, which second switching means changes over to a first position for driving the electric driving device upon completion of the operation of the time control means and changes over to a second position for making non-operative the electric driving device upon completion of charging of the time control means, and

m. connecting means on the camera body side for connecting the second switching means to the electric driving device, having a terminal on the camera body side connected to the second switching means;

6. an electric driving device comprising:

a. winding driving means which is engageable with the winding means,

b. connecting means on the electric driving device side for connecting the second switching means on the camera body side, said connecting means having a terminal on the electric driving side connecting to the terminal on the camera body side, and

c. control means for controlling the winding driving means, said control means being operative when the terminal on the electric driving device side is connected and the second switching means is changed over to the first position, and being non-operative when the second switching means is changed over to the second position,

and also in which second switching means is a change-over switch for controlling power supply which can be changed over by a movable contact piece between a first contact point which is the first position and a second contact point which is the second position, the first contact point being connected to a wind-up driving control means, and the second contact point being connected to the time control means, the diaphragm control means, and the electromagnetic release means.

10. A single lens reflex camera according to claim 6, in which the second switching means is a change-over switch having a first contact point connected to the electro-magnetic release means and a second contact point connected to a terminal.

11. A camera according to claim 6, in which the magnetic release means has a magnet.

12. A camera according to claim 6, which further comprises a memory means which is connected between the computation means and the diaphragm control means and memorizes the output computation of the computation means, and in which the diaphragm control means determines the diaphragm aperture of the diaphragm device.

16. A single lens reflex camera according to claim 11 which further includes means for indicating the non-operative state of the winding driving control means caused by the delay circuit.

7. A shutter time preference single lens reflex camera having an electric driving device, which comprises:

1. a camera body having,

a. a photographing lens having a diaphragm device,

b. means for measuring transmitted light of the photographing lens,

c. photographing information setting means having shutter time setting means,

d. computation means for computing the output of the photometric means and the output of the photographing information setting means,

e. diaphragm control means for controlling the operation of the diaphragm device, which means determines the diaphragm aperture of the diaphragm device in correspondence to the output computation of the computation means,

f. time control means for controlling shutter time in correspondence to the value set by the shutter time setting means,

g. means for actuating the diaphragm control means and the time control means,

h. magnetic release means for driving the actuating means,

i. a first switching means for controlling conductivity of the magnetic release means,

j. operation means for controlling "on" and "off" of the switching means,

k. film winding means for charging the time control means and the diaphragm control means,

l. a second switching means for controlling the action of said electric driving device, which second switching means changes over to a first position for driving the electric driving device upon completion of the operation of the time control means and changes over to a second position for making non-operative the electric driving device upon completion of charging of the time control means, and

m. connecting means on the camera body side for connecting the second switching means to the electric driving device, having a terminal on the camera body side connected to the second switching means;

8. an electric driving device comprising:

a. a winding driving means which is engageable with the winding means,

b. connecting means on the electric driving device side for connecting the second switching means on the camera body side, said connecting means having a terminal on the electric driving side connecting to the terminal on the camera body side, and

c. control means for controlling the winding driving means, said control means being operative when the terminal on the electric driving device side is connected and the second switching means is changed over to the first position, and being non-operative when the second switching means is changed over to the second position,

and also in which said electric driving device further comprises a delay circuit which starts to operate upon the change-over of the second switching means to the first position, said circuit being functional for making said wind-up drive control means to be inoperative when the period between completion of operation and completion of charging said time control means is longer than the predetermined time given by said delay circuit.

9. A shutter time preference single lens reflex camera attachable to an electric driving device thereto comprising:

a photographing lens, said lens being provided with a diaphragm device;

photometric means for measuring transmission light of said photographing lens;

means for setting photographing information said means having shutter time setting means;

operation means for computing the output of said photometric means and the output of said photographing information setting means;

diaphragm control means for controlling the action of said diaphragm device, said means being adapted to determine the aperture of said diaphragm device corresponding to the computed value of said operation means;

film winding-up means which charges the shutter time control means and the diaphragm control means;

a second switching means for operating alternatively the electromagnetic release means and the electric driving device, said second switching means being changed over by completion of charging of the time control means to a first state which operates the electromagnetic release means and being changed over by completion of operation of the time control means to a second state which actuates the electric driving device; and

means for transmitting the first and second states of the second switching means to the electric driving means, said means having a terminal connected to the second switching means.

diaphragm driving means for driving said diaphragm device, said means being adapted to drive said diaphragm device in correspondence with the diaphragm aperture determined by said diaphragm control means;

means for controlling the shutter time in correspondence to the value set by the shutter time setting means;

a mirror which introduces the transmission light of said photographing lens to a viewfinder;

means for driving said mirror, said means being adapted to cut off the transmission light of said photographing lens from being introduced toward the viewfinder while being adapted to admit the transmission light of said photographing lens to be introduced toward the film surface;

means for actuating said diaphragm control means, the diaphragm driving means, the time control means and the mirror driving means respectively;

single unit electromagnetic means for controlling the action of said actuation means;

a first switching means for controlling the conduction of said electromagnetic means; and

means for operating said switching means for controlling the "on" and "off" positions of said switching means;

13. A camera according to claim 9, which further comprises means for indicating the output computation of the computation means, which indicates a diaphragm value.

14. A single lens reflex camera having an electric driving device comprising:

1. a camera body including

a. a photographing lens having a diaphragm device,

b. means for measuring transmitted light of the photographing lens,

c. photographing information setting means,

d. computation means for computing the output of the photometric means and the output of the photographing information setting means,

e. exposure control means for controlling the amount of exposure in correspondence to the computed output value by the computation means,

f. diaphragm driving means for driving the diaphragm device,

g. a view finder,

h. a mirror which introduces the transmitted light of the photographing lens to the finder,

i. mirror driving means for driving the mirror which prevents the transmitted light of the photographing lens from being introduced to the finder and introduces it to the film surface,

j. actuation means for actuating the diaphragm driving means and the mirror driving means,

k. magnetic release means for controlling the actuation means,

l. a first switching means for controlling the conductivity of the magnetic release means,

m. operation means for controlling "on" and "off" of the first switching means,

n. film winding means,

o. shutter means,

p. a second switching means for controlling the driving of the electric driving device, which changes over to a first position which drives the electric driving device after the completion of exposure operation of the shutter means, and changes over to a second position which makes non-operative the electric driving device after completion of of the winding action of the film winding means, and

g. means for transmitting switching conditions of the second switching means to the electric driving device, said means having a terminal on the camera body side connected to the second switching means;

15. the electric driving device including:

a. winding driving means engageable with the film winding means,

b. connection means connected to the transmitting means, having a terminal on the electric driving device side connecting to a terminal on the camera body side,

c. means for controlling the winding driving means, which actuates the winding driving means when the second switching means is changed over to the first position, and does not actuate the winding driving means when the second switching means is changed over to the second position; and

d. a delay circuit which starts to operate upon the change-over of the second switching means to the first position, and makes non-operative the winding driving control means when the winding operation is not completed after the lapse of the delay time of the delay circuit.

17. A shutter time preference single lens reflex camera having an electric driving device, which comprises:

1. a camera body having,

a. a photographing lens having a diaphragm device,

b. means for measuring transmitted light of the photographing lens,

c. photographing information setting means having shutter time setting means,

d. computation means for computing the output of the photometric means and the output of the photographing information setting means,

e. diaphragm control means for controlling the operation of the diaphragm device, which means determines the diaphragm aperture of the diaphragm device in correspondence to the output computation of the computation means,

f. time control means for controlling shutter time in correspondence to the value set by the shutter time setting means,

g. means for actuating the diaphragm control means and the time control means,

h. magnetic release means for driving the actuating means,

i. a first switching means for controlling conductivity of the magnetic release means,

j. operation means for controlling "on" and "off" of the switching means,

k. film winding means for charging the time control means and the diaphragm control means,

l. a second switching means for controlling the action of said electric driving device, which second switching means changes over to a first position for driving the electric driving device upon completion of the operation of the time control means and changes over to a second position for making non-operative the electric driving device upon completion of charging of the time control means, and

m. connecting means on the camera body side for connecting the second switching means to the electric driving device, having a terminal on the camera body side connected to the second switching means;

18. an electric driving device comprising:

a. winding driving means which is engageable with the winding means,

b. connecting means on the electric driving device side for connecting the second switching means on the camera body side, said connecting having a terminal on the electric driving side connecting to the terminal on the camera body side,

c. control means for controlling the winding driving means, said control means being operative when the terminal on the electric driving device side is connected and the second switching means is changed over to the first position, and being non-operative when the second switching means is changed over to the second position,

in which said electric driving device further comprises a delay circuit which starts to operate upon the change-over of the second switching means to the first position, said circuit being functional for making said wind-up drive control means to be inoperative when the period between completion of operation and completion of charging said time control means is longer than the predetermined time given by said delay circuit; and

in which said electric driving device further comprises means for indicating inaction of said wind-up drive control means, said indication means being active to indicate when said wind-up drive control means is inoperative due to said relay circuit.