Seymour Z Ellin

US Patent:

39420760, Mar 2, 1976

Filed:

Dec 26, 1973

Appl. No.:

5/428456

Inventors:

Seymour Ellin - Chestnut Hill MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

H05B 3702

US Classification:

317 80

Abstract:

A remote flash slave apparatus for use in conjunction with a packaged linear array of flashlamps. The slave unit incorporates a solid state flashlamp selector circuit which is enabled or energized for only a limited period of time corresponding with the output interval of a typical flashlamp to preserve the integrity of the firing circuit. Additionally, the slave unit incorporates a feature providing for the avoidance of inadvertent cascading or firing of a series of flashlamps under a high steady-state light level environment.

US Patent:

40018431, Jan 4, 1977

Filed:

Jul 29, 1974

Appl. No.:

5/492774

Inventors:

Seymour Ellin - Chestnut Hill MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G03B 700

US Classification:

354 23D

Abstract:

A control system for a camera which automatically carries out an involved photographic cycle in response to the momentary depression of a start button. Under select low light level conditions, the automatic carrying out of the cycle is deferred for an operator light evaluation interval amounting to about 5 seconds. Should the operator determine to make a time exposure, the start button is depressed again to cause the camera to carry out a time exposure. An indicator arrangement may be supplied for apprising the operator of low light level conditions.

US Patent:

40054497, Jan 25, 1977

Filed:

Jun 24, 1974

Appl. No.:

5/482379

Inventors:

Seymour Ellin - Chestnut Hill MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G03B 1504

US Classification:

354128

Abstract:

A flash exposure system for use with a photographic camera of a variety which automatically carries out an involved photographic cycle upon the momentary depression of a start button. The system is particularly adapted to use with a linear flash array which is either replaced or reversed in its mounting upon the camera upon the expenditure of all lamps within an operational face thereof. The exposure system detects the expenditure of all lamps within an operative face of an array and inhibits the performance of an automatic cycle. Simultaneously, a perceptible warning signal apprises the operator of the expended status of the flash array.

US Patent:

43480870, Sep 7, 1982

Filed:

Apr 3, 1981

Appl. No.:

6/250853

Inventors:

Seymour Ellin - Chestnut Hill MA
John W. Stempeck - Reading MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G03B 1503

US Classification:

354139

Abstract:

A system for automatically controlling the charging operation of an electronic flash in a photographic apparatus operates to enable the electronic flash to charge in response to readying the camera in anticipation to implementing a photographic exposure cycle and thereafter disabling the charging of the electronic flash as soon as the electronic flash reaches its full charge condition. The control system responds to the subsequent actuation of the camera to initiate a photographic exposure cycle to reenable the electronic flash to again become fully charged. After the electronic flash is fully charged, it is again disabled from further charging during the remainder of the photographic exposure cycle.

US Patent:

40458067, Aug 30, 1977

Filed:

Aug 23, 1976

Appl. No.:

5/716362

Inventors:

Seymour Ellin - Brookline MA
John R. Sharp - Squantum MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G03B 700
G03B 904

US Classification:

354 37

Abstract:

An extended range exposure control system for photographic cameras having an aperture plate slidably movable from a first position in which it stops down the maximum relative aperture of the camera lens to second and third positions in which a photographic circuit is altered while the maximum relative lens aperture is maintained. A shutter mechanism controlled by a light sensitive circuit includes a switch actuated by movement of the aperture plate to the third position to shift the light level sensitivity range of the circuit thereby accommodating shutter speeds necessary to effect exposure of relatively fast film at maximum relative lens aperture. The aperture plate is slidably supported within a housing for the shutter and the respective positions thereof made clearly visible as a result of indicia on the exterior of the housing.

US Patent:

39355144, Jan 27, 1976

Filed:

Apr 20, 1973

Appl. No.:

5/353007

Inventors:

Seymour Ellin - Brookline MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

F21K 502

US Classification:

317 80

Abstract:

A photographic flash firing circuit operative to sequentially ignite each of an array of flash lamps in a predetermined order from first to last responsive to an input signal. The circuit is constructed as an integrated circuit including a dual set of circuit components capable of being interconnected for either low level, logic triggering or pulse triggering of the circuit. Basically, the firing circuit includes a plurality of lamp switching circuits and a forward sequencing circuit which sequentially couples each lamp across a supply voltage in accordance with repetitive activation by a suitable trigger network. In the logic trigger arrangement, the trigger network includes a transistor buffer stage and voltage divider network coupled to the forward sequencing circuit and operative to trigger the latter in accordance with operation of the camera exposure control system.

US Patent:

42681383, May 19, 1981

Filed:

May 29, 1979

Appl. No.:

6/042912

Inventors:

Richard J. Coppa - Westwood MA
Seymour Ellin - Chestnut Hill MA
John W. Stempeck - Reading MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G03B 714
G03B 716
G03B 1503

US Classification:

354 27

Abstract:

A photographic camera exposure and flash fire control system provides for a proportional fill flash by firing an electronic flash or strobe at an aperture appropriate for the camera-to-subject range. The flash is fired during the closing movement of the shutter blade mechanism and subsequent to the integration of ambient scene light to a select proportion of the optimum film exposure value whereby the remaining proportion of the optimum film exposure value is provided by the artificial illumination from the flash during the closing of the shutter blades.