US3573582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Large dc motor control circuit
Assignee: Individual
•
Filing: 1969-03-20
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Granted: 1971-04-06
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Expires: 1989-03-20
Abstract
Abstract A motor control apparatus for starting, stopping, and regulating the speed of large electric motors.
Inventors
- 👤 Edward A Petrocelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:07
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P1/00; H02P1/16; H02P1/18
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
141 words
In a motor control circuit, the improvement comprising: a motor, a plurality of voltage sources connected to provide a plurality of successively higher voltages, a plurality of selectively actuated switch means arranged to selectively connect respective ones of said voltage sources to said motor in a selected sequence, a plurality of driver means for driving said switch means, a cascaded chain of two state devices, pulse generator means arranged to supply a train of pulses to said cascaded chain of two state devices to sequentially switch said two state devices, a plurality of gating means, and means connecting said cascaded chain of two state devices, said plurality of gating means, said driver means, and said switch means whereby said two state devices control the actuation of said switch means to connect said voltage sources to said motor in a selected sequence.
Claim 2
Dependent Claim
141 words
In a motor control circuit, the improvement comprising: a motor, a plurality of voltage sources connected to provide a plurality of successively higher voltages, a plurality of selectively actuated switch means arranged to selectively connect respective ones of said voltage sources to said motor in a selected sequence, a plurality of driver means for driving said switch means, a cascaded chain of two state devices, pulse generator means arranged to supply a train of pulses to said cascaded chain of two state devices to sequentially switch said two state devices, a plurality of gating means, and means connecting said cascaded chain of two state devices, said plurality of gating means, said driver means, and said switch means whereby said two state devices control the actuation of said switch means to connect said voltage sources to said motor in a selected sequence.
Claim 3
Dependent Claim
33 words
The apparatus of claim 1 wherein said gating means are provided with control leads whereby control signals may be applied to selected ones of said gating means to thereby determine said selected sequence.
Claim 4
Dependent Claim
46 words
The apparatus of claim 2 wherein said gating means comprise a plurality of two input AND gates and a like plurality of OR gates, each of said two input AND gates having an output connection to the input of a respective one of said OR gates.
Claim 5
Dependent Claim
86 words
The apparatus of claim 3 wherein said control leads comprise a plurality of control leads with a control lead connected to the input of each respective one of said AND gates whereby selected ones of said AND gates may be enabled to pass a signal from a respective one of said two state devices to the input of a respective one of said OR Gates, and whereby selected ones of said OR gates may be selectively enabled by a control signal applied to its control lead.
Claim 6
Dependent Claim
31 words
The apparatus of claim 4 and including control means for controlling the supply of said train of pulses from said pulse generator means to said cascaded chain of two state devices.
Claim 7
Dependent Claim
126 words
The apparatus of claim 5 wherein said control means comprise a three input AND gate, and a control flip-flop, one input of said three input AND gate being connected to the output of said pulse generator means, a second input of said three input AND gate being connected to the output of said control flip-flop, the third input of said three input AND gate being adapted to receive a control signal, the output of said three input AND gate being connected to the set input of said first of said two state devices, whereby when a control signal is applied to said three input AND gate said gate is enabled to pass a pulse from said pulse generator means to set said first two state device.
Claim 8
Dependent Claim
71 words
The apparatus of claim 6 and including means connecting the output of said first one of said two state devices to the set input of said control flip-flop to set said control flip-flop and thereby remove the output voltage of said control flip-flop from said second input of said three input AND gate to thereby close said three input AND gate to the passage of pulses from said pulse generator means.
Claim 9
Dependent Claim
50 words
The apparatus of claim 7 wherein the output of each of said two state devices is connected to an enabling input of the next succeeding two state device to enable said succeeding two state device to be set by a pulse on its set-reset input from said pulse generator means.
Claim 10
Dependent Claim
35 words
The apparatus of claim 8 wherein said connecting means comprise a connection from the output of each of said two state devices to one input of a respective one of said two input AND gates.
Claim 11
Dependent Claim
44 words
The apparatus of claim 9 wherein said switch means are silicon controlled rectifiers, means connecting said rectifiers whereby a rectifier actuated to connect a voltage source to said motor is deactuated when a rectifier connecting a higher voltage source to said motor is actuated.
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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |