US3190174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide-actuate switch for photographic projector
Assignee: Charles Beseler Co
•
Filing: 1962-03-22
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Granted: 1965-06-22
•
Expires: 1982-03-22
Abstract
No abstract record available.
Inventors
- 👤 Philip M Field
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:13
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/132; Y; Y10; Y10S; Y10S353/00; Y10S353/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
IN A PHOTOGRAPHIC PROJECTOR OF THE TYPE WHEREIN A SWITCH IN THE LAMP CIRCUIT IS ACTUATED BY THE PLACEMENT INTO OPERATIVE POSITION OF A MEMBER CARRYING THE MATERIAL TO BE PROJECTED, THE IMPROVEMENT WHEREIN THE SWITCH ACTUATING MEANS ARE COOPERATING MAGNETIC MATERIAL MEMBERS CARRIED BY THE PROJECTOR AND THE SAID MEMBER, ONE OF THE MAGNETIC MATERIAL MEMBERS BEING A MAGNET.
Claim 2
Dependent Claim
60 words
IN A PHOTOGRAPHIC PROJECTOR OF THE TYPE WHEREIN A SWITCH IN THE LAMP CIRCUIT IS ACTUATED BY THE PLACEMENT INTO OPERATIVE POSITION OF A MEMBER CARRYING THE MATERIAL TO BE PROJECTED, THE IMPROVEMENT WHEREIN THE SWITCH ACTUATING MEANS ARE COOPERATING MAGNETIC MATERIAL MEMBERS CARRIED BY THE PROJECTOR AND THE SAID MEMBER, ONE OF THE MAGNETIC MATERIAL MEMBERS BEING A MAGNET.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |