US3103270A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time delay safety interlock for machines
Assignee: PROTECTOMATIC Inc
•
Filing: 1959-09-04
•
Granted: 1963-09-10
•
Expires: 1979-09-04
Abstract
No abstract record available.
Inventors
- 👤 James R Tilbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:34
CPC Classifications
F; F16; F16P; F16P3/00; F16P3/18; F16P3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A TIME DELAY SAFETY INTERLOCK SYSTEM FOR MACHINES COMPRISING A SLOW RELEASE RELAY HAVING NORMALLY OPEN CONTACTS FOR CONDITIONING OPERATION OF THE MACHINE WITH WHICH THE INTERLOCK SYSTEM IS ASSOCIATED WHEN SAID RELAY HAS BEEN ENERGIZED TO CLOSE SAID CONTACTS, A PAIR OF HAND SWITCHES EACH PROVIDED WITH NORMALLY CLOSE CONTACTS IN SERIES CIRCUIT WITH SAID RELAY VIA WHICH ENERGIZATION THEREOF MAY BE EFFECTED AND ALSO PROVIDED WITH NORMALLY OPEN CONTACTS IN SERIES CIRCUIT WITH SAID RELAY CONTACTS FOR PROVIDING ELECTRIC POWER WHEN CLOSED TO SAID RELAY CONTACTS TO THEN EFFECT OPERATION OF SAID MACHINE, AND INCLUDING SWITCH MEANS FOR SELECTIVELY BY-PASSING THE NORMALLY CLOSED CONTACTS OF SAID HAND SWITCHES TO PROVIDE TWO HAND AUTOMATIC OPERATION OF SAID MACHINE.
Claim 2
Dependent Claim
119 words
A TIME DELAY SAFETY INTERLOCK SYSTEM FOR MACHINES COMPRISING A SLOW RELEASE RELAY HAVING NORMALLY OPEN CONTACTS FOR CONDITIONING OPERATION OF THE MACHINE WITH WHICH THE INTERLOCK SYSTEM IS ASSOCIATED WHEN SAID RELAY HAS BEEN ENERGIZED TO CLOSE SAID CONTACTS, A PAIR OF HAND SWITCHES EACH PROVIDED WITH NORMALLY CLOSE CONTACTS IN SERIES CIRCUIT WITH SAID RELAY VIA WHICH ENERGIZATION THEREOF MAY BE EFFECTED AND ALSO PROVIDED WITH NORMALLY OPEN CONTACTS IN SERIES CIRCUIT WITH SAID RELAY CONTACTS FOR PROVIDING ELECTRIC POWER WHEN CLOSED TO SAID RELAY CONTACTS TO THEN EFFECT OPERATION OF SAID MACHINE, AND INCLUDING SWITCH MEANS FOR SELECTIVELY BY-PASSING THE NORMALLY CLOSED CONTACTS OF SAID HAND SWITCHES TO PROVIDE TWO HAND AUTOMATIC OPERATION OF SAID MACHINE.
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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) | 1966-09-09 | 1967-03-11 | 1967-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-09 | 1971-03-11 | 1971-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-09 | 1975-03-11 | 1975-09-10 | $7700.00 | Window Closed / Lapsed |