Patent US3280272A successfully refreshed from Google Patents.
US3280272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Muting switch mechanism for automatic record changers
Assignee: V M Corp
•
Filing: 1964-01-22
•
Granted: 1966-10-18
•
Expires: 1984-01-22
Abstract
No abstract record available.
Inventors
- 👤 Richard W Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:17
CPC Classifications
G; G11; G11B; G11B3/00; H; H01; H01R; H01R29/00; Y; Y10; Y10S; Y10S200/00; Y10S200/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
IN AN AUTOMATIC RECORD CHANGER OF THE TYPE HAVING A PHONO JACK FOR TRANSMITTING SIGNALS FROM A CARTRIDGE TO AN AMPLIFIER, THE IMPROVEMENT COMPRISING, IN COMBINATION, AN ELECTRICALLY POSITIVE PHONO JACK SOCKET MEMBER, A MUTING SWITCH INCLUDING A GROUNDED MOVABLE SWITCH ELEMENT, SAID SWITCH BEING POSITIONED IN SUCH A MANNER THAT SAID GROUNDED SWITCH ELEMENT IS MOVABLE INTO AND OUT OF CONTACT WITH SAID PHONO SOCKET MEMBER, MEANS FOR BIASING SAID MUTING SWITCH TO A NORMAL OPEN POSITION WHEREIN SAID SWITCH ELEMENT IS OUT OF CONTACT WITH SAID PHONO JACKET SOCKET MEMBER, AND ACTUATING MEANS FOR MOVING SAID SWITCH ELEMENT INTO CONTACT WITH SAID PHONO JACK SOCKET MEMBER DURING A RECORD CHANGE CYCLE.
Claim 2
Dependent Claim
113 words
IN AN AUTOMATIC RECORD CHANGER OF THE TYPE HAVING A PHONO JACK FOR TRANSMITTING SIGNALS FROM A CARTRIDGE TO AN AMPLIFIER, THE IMPROVEMENT COMPRISING, IN COMBINATION, AN ELECTRICALLY POSITIVE PHONO JACK SOCKET MEMBER, A MUTING SWITCH INCLUDING A GROUNDED MOVABLE SWITCH ELEMENT, SAID SWITCH BEING POSITIONED IN SUCH A MANNER THAT SAID GROUNDED SWITCH ELEMENT IS MOVABLE INTO AND OUT OF CONTACT WITH SAID PHONO SOCKET MEMBER, MEANS FOR BIASING SAID MUTING SWITCH TO A NORMAL OPEN POSITION WHEREIN SAID SWITCH ELEMENT IS OUT OF CONTACT WITH SAID PHONO JACKET SOCKET MEMBER, AND ACTUATING MEANS FOR MOVING SAID SWITCH ELEMENT INTO CONTACT WITH SAID PHONO JACK SOCKET MEMBER DURING A RECORD CHANGE CYCLE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |