US3307071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Touch responsive static electric control
Assignee: Otis Elevator Co
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Filing: 1965-01-07
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Granted: 1967-02-28
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Expires: 1985-01-07
Abstract
No abstract record available.
Inventors
- 👤 Lew H Diamond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:32
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/94; H03K17/96; H03K17/962
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
234 words
A CONTROL FOR ELECTRIC CIRCUITS OPERABLE BY THE TOUCH OF A PERSON AND PROVIDING AN ILLUMINATED INDICATION OF ITS OPERATED CONDITION COMPRISING; A SOLID STATE SEMICONDUCTIVE DEVICE HAVING FOUR TERMINALS INCLUDING AN ANODE TERMINAL, A CATHODE TERMINAL, AN ANODE GATE TERMINAL AND A CATHODE GATE TERMINAL; A BUTTON OF CONDUCTIVE MATERIAL CONNECTED TO SAID CATHODE GATE TERMINAL; A FIRST CURRENT SOURCE CONNECTED BETWEEN SAID ANODE TERMINAL AND SAID CATHODE TERMINAL AND APPLYING A POTENTIAL THEREACROSS; A SOURCE OF LIGHT LOCATED IN PROXIMITY WITH SAID BUTTON AND CONNECTED IN SERIES WITH SAID FIRST CURRENT SOURCE AND SAID DEVICE; MEANS CONNECTED TO SAID ANODE GATE TERMINAL FOR BIASING SAID TERMINAL WITH RESPECT TO THE POTENTIAL OF SAID ANODE TERMINAL; A PERIODIC CURRENT SOURCE CONNECTED BETWEEN GROUND AND SAID CATHODE TERMINAL, SAID PERIODIC CURRENT SOURCE HAVING SUFFICIENT POTENTIAL MAGNITUDE TO CAUSE SAID SEMICONDUCTIVE DEVICE TO CONDUCT BETWEEN SAID CATHODE TERMINAL AND SAID CATHODE GATE TERMINAL WHEN SAID BUTTON IS TOUCHED BY A PERSON; SAID FIRST CURRENT SOURCE HAVING SUFFICIENT POTENTIAL MAGNITUDE TO CAUSE SAID SEMICONDUCTIVE DEVICE TO CONDUCT BETWEEN ITS ANODE AND CATHODE TERMINALS WHEN CONDUCTION OCCURS BETWEEN ITS CATHODE AND CATHODE GATE TERMINALS AND TO CONTINUE TO CONDUCT BETWEEN SAID ANODE AND CATHODE TERMINALS AFTER CONDUCTING CEASES BETWEEN SAID CATHODE AND CATHODE GATE TERMINALS, THE CURRENT FLOWING BETWEEN SAID ANODE AND CATHODE TERMINALS WHEN CONDUCTION OCCURS THEREBETWEEN BEING SUFFICIENT TO CAUSE SAID LIGHT SOURCE TO ILLUMINATE.
Claim 2
Dependent Claim
234 words
A CONTROL FOR ELECTRIC CIRCUITS OPERABLE BY THE TOUCH OF A PERSON AND PROVIDING AN ILLUMINATED INDICATION OF ITS OPERATED CONDITION COMPRISING; A SOLID STATE SEMICONDUCTIVE DEVICE HAVING FOUR TERMINALS INCLUDING AN ANODE TERMINAL, A CATHODE TERMINAL, AN ANODE GATE TERMINAL AND A CATHODE GATE TERMINAL; A BUTTON OF CONDUCTIVE MATERIAL CONNECTED TO SAID CATHODE GATE TERMINAL; A FIRST CURRENT SOURCE CONNECTED BETWEEN SAID ANODE TERMINAL AND SAID CATHODE TERMINAL AND APPLYING A POTENTIAL THEREACROSS; A SOURCE OF LIGHT LOCATED IN PROXIMITY WITH SAID BUTTON AND CONNECTED IN SERIES WITH SAID FIRST CURRENT SOURCE AND SAID DEVICE; MEANS CONNECTED TO SAID ANODE GATE TERMINAL FOR BIASING SAID TERMINAL WITH RESPECT TO THE POTENTIAL OF SAID ANODE TERMINAL; A PERIODIC CURRENT SOURCE CONNECTED BETWEEN GROUND AND SAID CATHODE TERMINAL, SAID PERIODIC CURRENT SOURCE HAVING SUFFICIENT POTENTIAL MAGNITUDE TO CAUSE SAID SEMICONDUCTIVE DEVICE TO CONDUCT BETWEEN SAID CATHODE TERMINAL AND SAID CATHODE GATE TERMINAL WHEN SAID BUTTON IS TOUCHED BY A PERSON; SAID FIRST CURRENT SOURCE HAVING SUFFICIENT POTENTIAL MAGNITUDE TO CAUSE SAID SEMICONDUCTIVE DEVICE TO CONDUCT BETWEEN ITS ANODE AND CATHODE TERMINALS WHEN CONDUCTION OCCURS BETWEEN ITS CATHODE AND CATHODE GATE TERMINALS AND TO CONTINUE TO CONDUCT BETWEEN SAID ANODE AND CATHODE TERMINALS AFTER CONDUCTING CEASES BETWEEN SAID CATHODE AND CATHODE GATE TERMINALS, THE CURRENT FLOWING BETWEEN SAID ANODE AND CATHODE TERMINALS WHEN CONDUCTION OCCURS THEREBETWEEN BEING SUFFICIENT TO CAUSE SAID LIGHT SOURCE TO ILLUMINATE.
References Cited (Backward Citations)
US2925539A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |