Receiver of camera remote control system

• US 4,743,930 A
• Filed: 12/16/1986
• Issued: 05/10/1988
• Est. Priority Date: 12/19/1985
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Satoh, Toshihiko
• Primary Examiner(s): Gellner, Michael L.
• Application Number:
  US06/942,539
• Time in Patent Office: 511 Days
• Field of Search: 354/131, 354/267.1, 354/266, 354/238.1
• US Class Current: 396/59
• CPC Class Codes: G03B 17/38 Releasing-devices separate from shutter integral with shutter G03B9/08

Abstract

A camera remote control system including a transmitter arranged to transmit a control signal and a receiver arranged to receive said control signal to control an operation of the camera. The receiver of the camera remote control system is arranged to start a first stroke of operation of the camera when it has received the control signal transmitted by the transmitter and to start a second stroke of operation of the camera when a predetermined time has elapsed after starting the first stroke.

Claims

1. A receiver of a camera remote control system including a transmitter arranged at a remote position to transmit a control signal and a receiver arranged at a camera to receive said control signal to control the operation of the camera, said control signal being in the form of a plurality of cycles of pulses, each cycle including the pulses repeating at a predetermined recurrence rate and a predetermined period, comprising:

(a) first signal forming means arranged to form a first signal when it received the control signal from the transmitter;

(b) a timer circuit arranged to generate an output signal when a predetermined time has lapsed after forming said first signal; and

(c) means connected to the camera and arranged to feed said first signal to the camera as a first operating signal for effecting a preparatory operation of the camera and to feed the output signal of the timer circuit to the camera as a release signal for effecting a releasing operation of the camera; and

(d) a decision circuit for determining if the received pulses in the respective cycles are in consistent state, wherein said first signal forming means is arranged to form said first signal when it is decided by said decision circuit that the received pulses in the respective cycles are in consistent state.

4. A receiver according to claim 1, wherein said means connected to the camera includes first switching means arranged to effect its switching operation in response to said first signal, second switching means arranged to effect its switching operation in response to the output of said timer circuit, and a connecting member arranged to connect said first switching means in parallel with a first operating switch arranged to operate in association with a first stroke of operation of a release operating member of the camera and to connect said second switching means in parallel with a second operating switch arranged to operate in aassociation with a second stroke of operation of said release operating member.

5. A receiver according to claim 1, wherein said receiver further comprises a light receiving element.

6. A receiver according to claim 5, wherein said light receiving element is a light receiving diode.

2. A receiver of a camera remote control system including a transmitter arranged at a remote position to transmit a control signal and a receiver arranged at a camera to receive said control signal to control the operation of the camera, comprising:

(a) first signal forming means arranged to form a first signal when it received the control signal from the transmitter;

(b) a timer circuit arranged to generate an output signal when a predetermined time has lapsed after forming said first signal; and

(c) means connected to the camera and arranged to feed said first signal to the camera as a first operating signal for effecting a preparatory operation of the camera and to feed the output signal of the timer circuit to the camera as a release signal for effecting a releasing operation of the camera, wherein said means connected to the camera includes first switching means arranged to effect its switching operation in response to said first signal, second switching means arranged to effect its switching operation in response to the output of said timer circuit, and a connecting member arranged to connect said first switching means in parallel with a first operating switch arranged to operate in associated with a first stroke of operation of a release operating member of the camera and to connect said second switching means in parallel with a second operating switch arranged to operate in association with a second stroke of operation of said release operating member.

3. A receiver of a camera remote control system, including a transmitter arranged at a remote position to transmit a control signal and a receiver arranged at a camera to receiver said control signal to control the operation of the camera, comprising:

(a) a signal receiving part for receiving the control signal transmitted by said transmitter;

(b) a logic circuit arranaged to shift from a first output state to a second output state in response to a signal received by said signal receiving part when said logic circuit is in the first output state;

(c) a timer circuit arranged to operate in response to the second output state to generate an output signal after counting a predetermined time in response to the second output state, said logic circuit being arranged to shift to a third output state in response to the output signal of said timer circuit when said logic circuit is in the second output state, said timer circuit being arranged to count a predetermined time in response to said third output state to generate an output signal after counting said predetermined time, said logic circuit returning to said first output state in response to the output signal of said timer circuit when said logic circuit is in the third output state; and

(d) means connected to the camera and arranged to transmit the second output state to the camera as a first operating signal for effecting a preparatory operation of the camera, and to transmit the third output state to the camera as a release signal for effecting a release operation of the camera.