RELEASING DEVICE FOR CAMERAS WITH AUTOMATIC FILM ADVANCE
First Claim
1. In a camera apparatus having a solenoid to actuate the shutter, and a series electrical circuit to energize the solenoid which circuit includes a tripping switch, the improvement comprising:
- shutter switch means operatively connected to the shutter for forming an electrical connection when the shutter is operated;
a relay having a coil and contacts which are normally closed and are opened upon the energization of the coil, said contacts being in said series circuit so that the solenoid is not energized when the contacts are open; and
circuit means connecting said coil and said shutter switch means for energizing said coil when said shutter switch means forms said electrical connection, said circuit means including means for delaying the opening of the relay contacts upon the energizing of the coil, the last means comprising an adjustable resistance-capacitor device connected in parallel with said coil.
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Accused Products
Abstract
A relay is employed which has normally open contacts and normally closed contacts. A first series electrical circuit is formed from a source of electrical power through a manually operable switch, the normally closed contacts, and a solenoid for actuating the camera release button. A second series electrical circuit is formed through the relay coil, the flashlight contacts of the camera (which are closed when the shutter is operated) and the source of power. A capacitor and adjustable resistor are connected in series across the relay coil. The normally open relay contacts are connected in a series circuit with a signal light and the source of power.
5 Citations
3 Claims
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1. In a camera apparatus having a solenoid to actuate the shutter, and a series electrical circuit to energize the solenoid which circuit includes a tripping switch, the improvement comprising:
- shutter switch means operatively connected to the shutter for forming an electrical connection when the shutter is operated;
a relay having a coil and contacts which are normally closed and are opened upon the energization of the coil, said contacts being in said series circuit so that the solenoid is not energized when the contacts are open; and
circuit means connecting said coil and said shutter switch means for energizing said coil when said shutter switch means forms said electrical connection, said circuit means including means for delaying the opening of the relay contacts upon the energizing of the coil, the last means comprising an adjustable resistance-capacitor device connected in parallel with said coil.
- shutter switch means operatively connected to the shutter for forming an electrical connection when the shutter is operated;
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2. In an apparatus as set forth in claim 1, whErein said relay has a second set of contacts which are normally open and are closed when said coil is energized;
- a signal element; and
circuit means connecting said second set of contacts and said element for energizing said element when said second set of contacts are closed.
- a signal element; and
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3. In a camera apparatus having a solenoid to actuate the shutter, and a series electrical circuit to energize the solenoid which circuit includes a tripping switch, the improvement comprising:
- shutter switch means operatively connected to the shutter for forming an electrical connection when the shutter is operated;
a relay having a coil and contacts which are normally closed and are opened upon the energization of the coil, said contacts being in said series circuit so that the solenoid is not energized when the contacts are open, said relay having a second set of contacts which are normally open and are closed when said coil is energized;
circuit means connecting said coil and said shutter switch means for energizing said coil when said shutter switch means forms said electrical connection;
a signal element; and
circuit means connecting said second set of contacts and said element for energizing said element when said second set of contacts are closed.
- shutter switch means operatively connected to the shutter for forming an electrical connection when the shutter is operated;
Specification