Off delay timer and internally generated auxiliary direct current voltage source for a controlled rectifier alternating current switch for use therein
Abstract
Abstract IN AN OFF DELAY TIME FOR OPERATION FROM AN ALTERNATING CURRENT LINE, A NOVEL FORM OF INTERNALLY GENERATED D.C. POWER SOURCE IS PROVIDED. THE OUTPUT SWITCH OF THE TIMER IS A CONTROLLED RECTIFIER WHOSE GATE DRIVE CURRENT IS OBTAINED FROM A SERIES RESISTOR 45 AND BREAKDOWN DIODE 52 COMBINATION, CONNECTED TO THE ANODE OF THE AFORESAID CONTROLLED RECTIFIER. A SATURATING TRANSISTOR SWITCH IS PROVIDED AS A MEANS TO REMOVE THE GATE DRIVE TO THE CONTROLLED RECTIFIER WHEN REQUIRED. IN ADDITION, WITH THE AID OF A STORAGE CAPACITOR 49, AND A SERIES DIODE, A D.C. POTENTIAL IS DERIVED FROM THE SAID RESISTOR-BREAKDOWN DIODE CIRCUIT, AND THIS D.C. POTENTIAL IS USED TO POWER THE ANCILLARY CIRCUITS OF THE TIMER.
Inventors
- 👤 Guido Watson
Bibliographic Details
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| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |