Patent US3891906A successfully refreshed from Google Patents.
US3891906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage amplitude controlled reversing D.C. power circuit
Assignee: Individual
•
Filing: 1974-04-22
•
Granted: 1975-06-24
•
Expires: 1994-04-22
Abstract
Abstract The circuit permits control of two D.C. motors in both speed and direction over a single pair conductor line. Control circuits produce D.C. voltage of regulated amplitude. The controlled circuits are responsive to D.C. voltage pulses of opposite polarity. A zener diode passes voltages above a predetermined level and activates switches that cause the motor to run in a first direction. Voltages that do not peak at a level sufficient to initiate zener diode breakdown are utilized to activate a second set of switches and run the D.C. motor in a second direction. A capacitor permits sufficient time delay in the second set of switches for voltages of sufficient amplitude to peak and activate the zener diode. Once the zener diode is activated the second set of switches are latched off.
Inventors
- 👤 Elester M Crist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:39
CPC Classifications
H; H02; H02P; H02P5/00; H02P5/68; H02P7/00; H02P7/03; H02P7/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
153 words
Voltage amplitude controlled reversing D.C. power circuit comprising: a source of electrical power having a regularly pulsating voltage amplitude, regulation means connected to said source of electrical power for passing D.C. power exceeding a predetermined voltage amplitude, a polarity sensitive D.C. power utilization device having first and second input-output terminals, first electronic switch means for connecting said first inputoutput terminal to said source of electrical power, second electronic switch means for connecting said second inputoutput terminal to said source of electrical power, first switch operator means connected to said regulation means for turning on said first electronic switch means and turning off and holding off said second electronic switch means in response to said regulation means passing electrical power above a predetermined voltage level, second switch operator means connected to said source of electrical power for turning on said second electronic switch means in response to voltage levels below said predetermined voltage amplitude.
Claim 2
Dependent Claim
153 words
Voltage amplitude controlled reversing D.C. power circuit comprising: a source of electrical power having a regularly pulsating voltage amplitude, regulation means connected to said source of electrical power for passing D.C. power exceeding a predetermined voltage amplitude, a polarity sensitive D.C. power utilization device having first and second input-output terminals, first electronic switch means for connecting said first inputoutput terminal to said source of electrical power, second electronic switch means for connecting said second inputoutput terminal to said source of electrical power, first switch operator means connected to said regulation means for turning on said first electronic switch means and turning off and holding off said second electronic switch means in response to said regulation means passing electrical power above a predetermined voltage level, second switch operator means connected to said source of electrical power for turning on said second electronic switch means in response to voltage levels below said predetermined voltage amplitude.
Claim 3
Dependent Claim
48 words
The voltage amplitude controlled reversing D.C. power supply circuit according to claim 1 further including: a delay means connected to said electronic switch means for delaying the action of said second switch operator means and permitting voltage pulses having sufficient amplitude to actuate said first switch operator means.
Claim 4
Dependent Claim
81 words
The voltage amplitude controlled reversing D.C. power supply circuit according to claim 1 further including: said first electronic switch means comprises a first S.C.R. connected between said source of electrical power and said first input-output terminal and a second S.C.R. connected between said second input-output terminal and ground, said second electronic switch means comprises a first S.C.R. connected between said source of electrical power and said second input-output terminal and a second S.C.R. connected between said first input-output terminal and ground.
Claim 5
Dependent Claim
45 words
The voltage amplitude controlled reversing D.C. power supply circuit according to claim 3 including: said first and second switch operator means comprise voltage dividers connected to the gates of said S.C.R.'' s comprising said first and second electronic switch means and supplying gate current thereto.
Claim 6
Dependent Claim
42 words
The voltage amplitude controlled reversing D.C. power supply circuit according to claim 4 including: said first switch operator means further comprises a third S.C.R. connected between the gate current supply and ground on said S.C.R.'' s comprising said second electronic switch means.
Claim 7
Dependent Claim
28 words
The voltage amplitude controlled reversing D.C. power supply circuit according to claim 5 including: sAid delay means comprises a capacitor connected between said gate current supply and ground.
Claim 8
Dependent Claim
61 words
The voltage amplitude controlled reversing D.C. power supply circuit according to claim 6 further including: filter means for filtering said pulsating voltage from said source from reaching said power utilization device through said second electronic switch means, diode means for isolating said filter from said regulation means, said regulation means comprising a zener diode, said utilization device comprising a D.C. motor,
Claim 9
Dependent Claim
52 words
The voltage amplitude controlled reversing D.C. power supply circuit according to claim 6 further including: said source of electrical power comprises at least one control circuit means for delivering rectified A.C. at a first voltage range below said predetermined voltage amplitude and at a second voltage range above said predetermined voltage amplitude.
Claim 10
Dependent Claim
28 words
The voltage amplitude controlled reversing D.C. power supply circuit according to claim 8 wherein: said first voltage is variable in said first voltage range by a variable resistor.
Claim 11
Dependent Claim
97 words
The voltage amplitude controlled reversing D.C. power supply circuit according to claim 8 further comprising: isolation means in said controlled circuit for making said circuit responsive to voltage of a single polarity, two of said control circuits producing rectified A.C. of opposite polarity and connected to two of said D.C. power controlled circuits over a single two conductor line, the first of said D.C. power controlled circuits being responsive to voltages produced by one of said control circuits and the second D.C. power controlled circuit being responsive to voltages produced by the other of said control circuits.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |