US3585406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for controlling intermittent and bidirectional operation of motors
Assignee: Bull HN Information Systems Italia SpA
•
Filing: 1968-06-03
•
Granted: 1971-06-15
•
Expires: 1988-06-03
Abstract
Abstract An electronic power switch employs four transistors to provide electrical current in either of two directions to a pair of current output terminals from a single power supply.
Inventors
- 👤 Gene J Colter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:29
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/24; H02P7/28; H02P7/285; H02P7/29; H02P7/2913
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
269 words
A motor control circuit for use with a source of forward signals aNd a source of reverse signals, said circuit comprising: first, second, third, fourth, fifth and sixth transistors each having a base, a collector and an emitter; first, second, third and fourth reference potentials; coupling means connecting said emitters of said first and said second transistors to said first potential; first and second signal input terminals, said first input terminal being coupled to said base of said first and said fourth transistors, said collectors of said third and said fourth transistors being connected to said second potential; first and second current output terminals, said first output terminal being connected to said collectors of said first transistor and to said emitter of said third transistor, said second output terminal being connected to said collector of said second transistor and to said emitter of said fourth transistor, said second input terminal being coupled to said base of said second and said third transistors, said third potential being connected to said emitters of said fifth and sixth transistors, said base of said fifth transistor being coupled to said source of forward signals, said base of said sixth transistor being coupled to said source of reverse signals; and first and second resistors, said first resistor being connected between said fourth potential and said collector of said fifth transistor, said collector of said fifth transistor being connected to said first signal input terminal, said collector of said sixth transistor being connected to said second signal input terminal, said second resistor being connected between said fourth potential and said collector of said sixth transistor.
Claim 2
Dependent Claim
269 words
A motor control circuit for use with a source of forward signals aNd a source of reverse signals, said circuit comprising: first, second, third, fourth, fifth and sixth transistors each having a base, a collector and an emitter; first, second, third and fourth reference potentials; coupling means connecting said emitters of said first and said second transistors to said first potential; first and second signal input terminals, said first input terminal being coupled to said base of said first and said fourth transistors, said collectors of said third and said fourth transistors being connected to said second potential; first and second current output terminals, said first output terminal being connected to said collectors of said first transistor and to said emitter of said third transistor, said second output terminal being connected to said collector of said second transistor and to said emitter of said fourth transistor, said second input terminal being coupled to said base of said second and said third transistors, said third potential being connected to said emitters of said fifth and sixth transistors, said base of said fifth transistor being coupled to said source of forward signals, said base of said sixth transistor being coupled to said source of reverse signals; and first and second resistors, said first resistor being connected between said fourth potential and said collector of said fifth transistor, said collector of said fifth transistor being connected to said first signal input terminal, said collector of said sixth transistor being connected to said second signal input terminal, said second resistor being connected between said fourth potential and said collector of said sixth transistor.
Claim 3
Dependent Claim
108 words
A motor control circuit for use with a source of forward signals, a source of reverse signals and a source of speed control signals, said circuit comprising: a control circuit as defined in claim 3; a seventh transistor having a base, a collector and an emitter, said base of said seventh transistor being coupled to said source of speed control signals, said emitter of said seventh transistor being connected to said third potential; first diode means for connecting said collector of said seventh transistor to said first signal input terminal; and second diode means for connecting said collector of said seventh transistor to said second signal input terminal
Claim 4
Dependent Claim
235 words
An electronic power switch for providing current in either of two directions to a pair of current output terminals from a single power supply, said switch comprising: first, second, third, fourth and fifth transistors each having a base, a collector and an emitter; first, second and third reference potentials; first and second signal input terminals, said first input terminal being coupled to said base of said first and said fourth transistors, said collectors of said third and said fourth transistors being connected to said second potential; first and second current output terminals, said first output terminal being connected to said collector of said first transistor and to said emitter of said third transistor, said second output terminal being connected to said collector of said second transistor and to said emitter of said fourth transistor, said second input terminal being coupled to said base of said second and said third transistor; and a potentiometer having first and second current terminals and a signal output terminal, said first current terminal being connected to said first potential, said second current terminal being connected to said emitters of said first and said second transistors, said signal output terminal of said potentiometer being coupled to said base of said fifth transistor, said third reference potential being coupled to said emitter of said fifth transistor, said collector of said fifth transistor being coupled to said first and said second input terminals.
Claim 5
Dependent Claim
235 words
An electronic power switch for providing current in either of two directions to a pair of current output terminals from a single power supply, said switch comprising: first, second, third, fourth and fifth transistors each having a base, a collector and an emitter; first, second and third reference potentials; first and second signal input terminals, said first input terminal being coupled to said base of said first and said fourth transistors, said collectors of said third and said fourth transistors being connected to said second potential; first and second current output terminals, said first output terminal being connected to said collector of said first transistor and to said emitter of said third transistor, said second output terminal being connected to said collector of said second transistor and to said emitter of said fourth transistor, said second input terminal being coupled to said base of said second and said third transistor; and a potentiometer having first and second current terminals and a signal output terminal, said first current terminal being connected to said first potential, said second current terminal being connected to said emitters of said first and said second transistors, said signal output terminal of said potentiometer being coupled to said base of said fifth transistor, said third reference potential being coupled to said emitter of said fifth transistor, said collector of said fifth transistor being coupled to said first and said second input terminals.
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |