Joseph W Wright

US Patent:

40991377, Jul 4, 1978

Filed:

Jun 10, 1977

Appl. No.:

5/805498

Inventors:

Benjamin C. Alm - Arnold MD
Francis W. Hopwood - Severna Park MD
Robert A. Jelen - Arnold MD
John P. Muhlbaier - Joppa MD
Joseph F. Wright - Columbia MD

Assignee:

Westinghouse Electric Corp. - Pittsburgh PA

International Classification:

H03B 308

US Classification:

331 16

Abstract:

A digitally controlled microwave phase lock loop for switching rapidly from one lock frequency to another is disclosed. A digital word corresponding to a desired input voltage for a selected frequency is converted to an analog voltage for application to the coarse tuning port of the loop's voltage controlled oscillator. Prior to switching to another frequency, the error voltage for the fine tuning port is compared with a zero error reference voltage. The least significant bit of the digital word for such frequency is increased or decreased by one depending on the direction difference between the compared voltages. This incrementally changed word controls the coarse tuning voltage during the next selection of the particular frequency. The system is initialized by repetitively selecting each of the possible frequencies until the digital word for each selected frequency is within one increment of the zero error reference voltage for the fine tuning port.

US Patent:

40185184, Apr 19, 1977

Filed:

Dec 10, 1974

Appl. No.:

5/531340

Inventors:

Joseph H. Wright - Marblehead MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G03B 2302

US Classification:

352 78R

Abstract:

A photographic film cassette including a drive transmission arrangement configured for operating a film capstan and for selectively driving supply and take-up reels of the cassette responsive to projector driving operation. The cassette is a large capacity film cassette for use with automatic projector apparatus of the type having a cassette-receiving well smaller than the space occupied by take-up and supply reels of the large capacity cassette and is provided with a tongue-like housing portion receivable in the cassette well of the projection apparatus. Contained within the cassette is reversible drive transmission by which drive spindles in the cassette well are coupled to both an isolating capstan and the film reels to effect advancing movement of the film strip from the supply reel to the take-up reel during projection and rewinding movement of the film strip back to the supply reel after projection.

US Patent:

46079297, Aug 26, 1986

Filed:

Nov 28, 1984

Appl. No.:

6/675858

Inventors:

John B. Morse - Boston MA
Joseph H. Wright - Andover MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G03D 506

US Classification:

354318

Abstract:

A photographic processing liquid applicator having a reservoir for containing a supply of alkaline processing liquid. The upper portion of the reservoir has an egress while a lower portion of the reservoir is provided with an ingress which is in communication with a container of processing liquid. Rotatably mounted within the reservoir is a roller for applying a coating of the processing liquid to a length of sheet material. During each coating operation, a supply of processing liquid greater than that required to coat the sheet material is added to the liquid already in the reservoir, via the ingress, thus causing its level to rise above the egress. Processing liquid is thus skimmed or drained from the surface of the liquid, which liquid would have been most exposed to the adverse affects of the oxygen in the atmosphere.

US Patent:

RE302325, Mar 18, 1980

Filed:

Aug 14, 1978

Appl. No.:

5/933721

Inventors:

Joseph H. Wright - Marblehead MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G03B 2302

US Classification:

352 78R

Abstract:

A photographic film cassette including a drive transmission arrangement configured for operating a film capstan and for selectively driving supply and take-up reels of the cassette responsive to projector driving operation. The cassette is a large capacity film cassette for use with automatic projector apparatus of the type having a cassette-receiving well smaller than the space occupied by take-up and supply reels of the large capacity cassette and is provided with a tongue-like housing portion receivable in the cassette well of the projection apparatus. Contained within the cassette is reversible drive transmission by which drive spindles in the cassette well are coupled to both an isolating capstan and the film reels to effect advancing movement of the film strip from the supply reel to the take-up reel during projection and rewinding movement of the film strip back to the supply reel after projection.

US Patent:

40329372, Jun 28, 1977

Filed:

Sep 10, 1975

Appl. No.:

5/612209

Inventors:

Joseph H. Wright - Marblehead MA

Assignee:

Polaroid Corporation - Cambridge MA

International Classification:

G03B 1750
G03B 1726

US Classification:

354 86

Abstract:

A thin dark chamber or light shielding adapter that is configured to be slidably inserted through a narrow film exit slot in a self-developing camera for receiving and light shielding self-developing film units of the type requiring a short imbibition period in a light-free environment subsequent to the distribution of a processing composition between predetermined layers of the film unit.