Patent US3662227A successfully refreshed from Google Patents.
US3662227A
Expired / Lapsed
US
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Control systems
Assignee: Cableform Ltd
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Filing: 1970-02-10
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Granted: 1972-05-09
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Expires: 1990-02-10
Abstract
Abstract An electrically operated machine has a bi-manual or double button control system which requires an operator to depress both buttons to institute operation, provision being made that both buttons have to be operated within a delay period thus preventing one or other button being wedged-on. If operation of both buttons does not occur within the delay period the circuit is disabled and can only be re-enabled by releasing both buttons.
Inventors
- 👤 John J Morrison
- 👤 John Morton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:01
CPC Classifications
F; F16; F16P; F16P3/00; F16P3/18; F16P3/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
118 words
A control system for an electrically controlled machine comprising a plurality of separate actuators connected to a first OR gate having a corresponding number of inputs, and connected to an AND gate having an input additional to the corresponding number of actuators, which additional input is connected to the output of a second OR gate having as its input the output of the AND gate and the output of a time delay device, the input of which receives the output of the first OR gate to initiate a time delay period, the output of the AND gate controlling switching means controlling the supply of power to the machine when all the actuators are operated within the delay period.
Claim 2
Dependent Claim
118 words
A control system for an electrically controlled machine comprising a plurality of separate actuators connected to a first OR gate having a corresponding number of inputs, and connected to an AND gate having an input additional to the corresponding number of actuators, which additional input is connected to the output of a second OR gate having as its input the output of the AND gate and the output of a time delay device, the input of which receives the output of the first OR gate to initiate a time delay period, the output of the AND gate controlling switching means controlling the supply of power to the machine when all the actuators are operated within the delay period.
Claim 3
Dependent Claim
100 words
A control system for an electrically controlled machine comprising a transformer having two primary windings each of which is energized from an AC supply by operation of a corresponding actuator having contacts, said transformer having a secondary winding arrangement supplying a rectifier arrangement to energize a relay device in series with a capacitor thereby causing operation of the relay device for a predetermined delay time, said relay device having contacts in series with the contacts of the actuators and a contactor device thereby enabling initiation of operation of the contactor device during the delay time by operation of both actuators.
Claim 4
Dependent Claim
100 words
A control system for an electrically controlled machine comprising a transformer having two primary windings each of which is energized from an AC supply by operation of a corresponding actuator having contacts, said transformer having a secondary winding arrangement supplying a rectifier arrangement to energize a relay device in series with a capacitor thereby causing operation of the relay device for a predetermined delay time, said relay device having contacts in series with the contacts of the actuators and a contactor device thereby enabling initiation of operation of the contactor device during the delay time by operation of both actuators.
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |