PHOTOGRAPHIC MONITORING DEVICE

• US 3,554,102 A
• Filed: 07/10/1968
• Issued: 01/12/1971
• Est. Priority Date: 07/18/1967
• Status: Expired due to Term

• Current Assignee: Maronde Herbert
• Original Assignee: Maronde Herbert
• Inventors: MARONDE HERBERT
• Application Number:
  US04/743,819
• Time in Patent Office: 916 Days
• US Class Current: 396/315
• CPC Class Codes: G03B 17/245 Optical means
• CPC Class Codes: G03B 2217/243 Optical devices

Abstract

A camera has an instantaneously operating main shutter operated by the actuation of an electromagnetic tripping device and an auxiliary shutter held open so long as the device is actuated. An exposure relay operates the device and a release relay operates the exposure relay for a period of time determined by an adjustable resistance-capacitor means. The release relay also increases the illumination provided by an auxiliary light source. A counter is controlled by a switch on the main shutter and disables the release relay after a given number of actuations of the main shutter except when a magazine is inserted in the camera.

Claims

1. In a photographic-monitoring apparatus for use with and including a camera having an automatic film advance and an automatically setable main shutter means adapted to photograph the mentioned object and auxiliary shutter means releasable with the main shutter means to simultaneously photograph a secondary image reflected into the image field of subject matter and an electromagnetic-tripping device for actuating both of the shutters, the improvement comprising:

said main shutter means when actuated by said device providing an instantaneous exposure;

said auxiliary shutter means when actuated by said device providing a time exposure commensurate with the time of actuation of said device;

an exposure relay connected to said device for energizing said device for therethrough; and

control means connected to said relay to determine the length of time that said device is energized through the relay.

2. In an apparatus as set forth in claim 1, wherein said control means includes an adjustable resistance-capacitor device.

3. In an apparatus as set forth in claim 2, wherein said control means includes a release relay having a break contact which is opened and a make contact which is closed when the release relay is actuated;

said resistance-capacitor device being connected to said source through said break contact for charging;

said exposure relay being connected to said resistance-capacitor device through said make contact for energizing the exposure relay from said resistance-capacitor device to actuate said tripping device so long as said exposure relay is energized;

a manually operable switch; and

circuit means connecting said switch and said release relay to said source to actuate said release relay in response to the manual operation of said switch.

4. In an apparatus as set forth in claim 3, including a shutter switch operably connected to the main shutter to be actuated each time the main shutter is actuated, and wherein said circuit means includes an exposure counter having counting contacts and means connecting said manual switch and said release relay through said counting contacts to form an electrical circuit therethrough except at a predetermined count at which time said circuit is open, said counter being connected to said source through said shutter switch to actuate the counter each time that the shutter switch is actuated by the main shutter.

5. In an apparatus as set forth in claim 4 for use with a camera having an attachable film magazine, and including a bridging switch connected in parallel with said counting contacts, said bridging switch being positioned to be closed when said magazine is attached to said camera to thereby render the counter ineffective at said predetermined count and to permit the actuation Of the release relay.

6. In an apparatus as set forth in claim 5 for use with an auxiliary light to illuminate said subject matter, and wherein said release relay has a second make contact, said auxiliary light being connected to said source through said second make contact to energize said light when said release relay is actuated.

7. In an apparatus as set forth in claim 6, including resistance means connecting said auxiliary light to said source to cause said light to be turned on to a lesser extent when said release relay is not actuated.

8. In an apparatus as set forth in claim 7, including a second adjustable resistance-capacitor device, another switch and means connecting said other switch and said second resistance-capacitor device in parallel with said release relay to maintain the energization of the release relay for a period of time.

9. In an apparatus as set forth in claim 3 for use with an auxiliary light to illuminate said subject matter, and wherein said release relay has a second make contact, said auxiliary light being connected to said source through said second make contact to energize said light when said release relay is actuated. 10 In an apparatus as set forth in claim 9, including a signal lamp, and means connecting said signal lamp to said source through said auxiliary light whereby said signal lamp glows relatively bright when said release relay is actuated, the last-mentioned means connecting said signal lamp to cause said lamp to be turned on to a lesser extent when said release relay is not actuated.

11. In apparatus as set forth in claim 10, including a second adjustable resistance-capacitor device, another switch and means connecting said other switch and said second resistance-capacitor device in parallel with said release relay to maintain the energization of the release relay for a period of time.

12. In an apparatus as set forth in claim 3, including a second adjustable resistance-capacitor device, another switch and means connecting said other switch and said second resistance-capacitor device in parallel with said release relay to maintain the energization of the release relay for a period of time.