Patent US3513608A successfully refreshed from Google Patents.
Patent US3280713A successfully refreshed from Google Patents.
US3280713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control mechanism for a roll film camera
Assignee: E Leitz Inc
•
Filing: 1964-12-04
•
Granted: 1966-10-25
•
Expires: 1984-12-04
Abstract
No abstract record available.
Inventors
- 👤 Norman N Goldberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:45
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/42; G03B17/425
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
MECHANISM FOR THE RAPID SEQUENCE OPERATION OF A ROLL FILM CAMERA HAVING A FILM WINDING MECHANISM AND SHUTTER TRIPPING MEANS COMPRISING: (A) A MOTOR DRIVE UNIT COMPRISING A POWER SOURCE AND AN ELECTRICAL MOTOR HAVING A DRIVE SHAFT ADAPTED TO BE DRIVEN T A CONSTANT ANGULAR VELOCITY, (B) A FIRST SWITCH OF COMPLETING A FIRST ELECTRICAL CIRCUIT BETWEEN SAID POWER SOURCE AND SAID MOTOR TO START SAID MOTOR, (C) MEANS RESPONSIVE TO THE ROTATION OF SAID DRIVE SHAFT FOR ACTUATING THE SHUTTER TRIPPING MEANS FOR SAID CAMERA, (D) MEANS RESPONSIVE TO THE ROTATION OF SAID DRIVE SHAFT FOR ADVANCING THE FILM WINDING MECHANISM OF SAID CAMERA AFTER EACH ACTUATION OF THE SHUTTER TRIPPING MEANS OF SAID CAMERA, (E) A SECOND SWITCH FOR COMPLETING A SECOND ELECTRICAL CIRCUIT BETWEEN SAID POWER SOURCE AND SAID MOTOR FOR CONTINUING THE ROTATION OF SAID DRIVE SHAFT AFTER SAID FIRST SWITCH HAS BEEN OPENED, AND (F) MEANS RESPONSIVE TO THE ROTATION OF SAID DRIVE SHAFT FOR OPERATING SAID SECOND SWITCH TO INTERRUPT SAID SECOND ELECTRICAL CIRCUIT AND TO COMPLETE A THIRD CIRCUIT AROUND SAID MOTOR FOR DYNAMICALLY BRAKING SAID MOTOR.
Claim 2
Dependent Claim
185 words
MECHANISM FOR THE RAPID SEQUENCE OPERATION OF A ROLL FILM CAMERA HAVING A FILM WINDING MECHANISM AND SHUTTER TRIPPING MEANS COMPRISING: (A) A MOTOR DRIVE UNIT COMPRISING A POWER SOURCE AND AN ELECTRICAL MOTOR HAVING A DRIVE SHAFT ADAPTED TO BE DRIVEN T A CONSTANT ANGULAR VELOCITY, (B) A FIRST SWITCH OF COMPLETING A FIRST ELECTRICAL CIRCUIT BETWEEN SAID POWER SOURCE AND SAID MOTOR TO START SAID MOTOR, (C) MEANS RESPONSIVE TO THE ROTATION OF SAID DRIVE SHAFT FOR ACTUATING THE SHUTTER TRIPPING MEANS FOR SAID CAMERA, (D) MEANS RESPONSIVE TO THE ROTATION OF SAID DRIVE SHAFT FOR ADVANCING THE FILM WINDING MECHANISM OF SAID CAMERA AFTER EACH ACTUATION OF THE SHUTTER TRIPPING MEANS OF SAID CAMERA, (E) A SECOND SWITCH FOR COMPLETING A SECOND ELECTRICAL CIRCUIT BETWEEN SAID POWER SOURCE AND SAID MOTOR FOR CONTINUING THE ROTATION OF SAID DRIVE SHAFT AFTER SAID FIRST SWITCH HAS BEEN OPENED, AND (F) MEANS RESPONSIVE TO THE ROTATION OF SAID DRIVE SHAFT FOR OPERATING SAID SECOND SWITCH TO INTERRUPT SAID SECOND ELECTRICAL CIRCUIT AND TO COMPLETE A THIRD CIRCUIT AROUND SAID MOTOR FOR DYNAMICALLY BRAKING SAID MOTOR.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |