US3077967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety switch for mechanized files
Assignee: Unisys Corp
•
Filing: 1959-09-24
•
Granted: 1963-02-19
•
Expires: 1979-09-24
Abstract
No abstract record available.
Inventors
- 👤 Benjamin W Woodward
- 👤 Walter G Anders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:29
CPC Classifications
B; B42; B42F; B42F17/00; B42F17/28; A; A47; A47B; A47B63/00; A47B63/06; A47B63/067
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A SAFETY DEVICE FOR A MECHANIZED FILE WHEREIN A PLURALITY OF TRAYS ARE MOVED BY A MOTOR AND MOTOR CONTROLLED CIRCUIT MEANS WITHIN A CASING PROVIDED WITH AN OPENING PERMITTING ACCESS TO THE TRAYS, COMPRISING A GROUNDED WIRE EXTENDING ACROSS THE OPENING, YIELDABLY ADJUSTABLE MEANS FOR HOLDING THE WIRE TAUT, AND AN ELECTRICALLY CHARGED PLATE IN SAID CIRCUIT MEANS DISPOSED CLOSELY ADJACENT SAID WIRE FOR DEENERGIZING THE MOTOR CONTROL CIRCUIT TO STOP THE MOTOR WHEN SAID WIRE IS MOVED AGAINST THE RESISTANCE OF SAID HOLDING MEANS AND INTO CONTACT WITH SAID PLATE.
Claim 2
Dependent Claim
92 words
A SAFETY DEVICE FOR A MECHANIZED FILE WHEREIN A PLURALITY OF TRAYS ARE MOVED BY A MOTOR AND MOTOR CONTROLLED CIRCUIT MEANS WITHIN A CASING PROVIDED WITH AN OPENING PERMITTING ACCESS TO THE TRAYS, COMPRISING A GROUNDED WIRE EXTENDING ACROSS THE OPENING, YIELDABLY ADJUSTABLE MEANS FOR HOLDING THE WIRE TAUT, AND AN ELECTRICALLY CHARGED PLATE IN SAID CIRCUIT MEANS DISPOSED CLOSELY ADJACENT SAID WIRE FOR DEENERGIZING THE MOTOR CONTROL CIRCUIT TO STOP THE MOTOR WHEN SAID WIRE IS MOVED AGAINST THE RESISTANCE OF SAID HOLDING MEANS AND INTO CONTACT WITH SAID PLATE.
References Cited (Backward Citations)
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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) | 1966-02-18 | 1966-08-20 | 1967-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-18 | 1970-08-20 | 1971-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-18 | 1974-08-20 | 1975-02-19 | $7700.00 | Window Closed / Lapsed |