US3659172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor controlling device
Assignee: Hitachi Ltd
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Filing: 1971-02-09
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Granted: 1972-04-25
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Expires: 1991-02-09
Abstract
Abstract A motor-controlling device in which a driving circuit for a motor connected with an AC power supply is controlled through the contacts of a first relay, and positions where a load driven by the motor stops are detected by a position-detecting means. Output signals of the position-detecting means are used to control the motor-driving circuit. Other operating systems are operated through second and third relays while the motor is in operation.
Inventors
- 👤 Iwao Sugiyama
- 👤 Kubokura Kuniaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:51
CPC Classifications
D; D05; D05B; D05B69/00; D05B69/14; D05B69/18
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
106 words
A motor-controlling device comprising a position-detecting means including two switches which operate respectively at first and second positions of a load driven by a motor, a first control element which is energized through a starting switch closed in starting a job and closes a driving circuit for said motor while said load moves from said first position to second position, a second control element which is energized by closing said starting switch and selects one of said two switches for said position-detecting means, and a third control element which operates in response to the movement of said load from said first position to said second position.
Claim 2
Dependent Claim
106 words
A motor-controlling device comprising a position-detecting means including two switches which operate respectively at first and second positions of a load driven by a motor, a first control element which is energized through a starting switch closed in starting a job and closes a driving circuit for said motor while said load moves from said first position to second position, a second control element which is energized by closing said starting switch and selects one of said two switches for said position-detecting means, and a third control element which operates in response to the movement of said load from said first position to said second position.
Claim 3
Dependent Claim
58 words
A motor-controlling device according to claim 1, in which said first and second control elements comprise first and second relays respectively, and said third control element is inserted in a self-maintenance circuit for said second relay and comprises an instruction switch for energizing the second relay to move the load from said first position to said second position.
Claim 4
Dependent Claim
69 words
A motor-controlling device according to claim 1, in which said first and second control elements comprise first and second relays respectively, and the third control element is controlled by an instruction switch for instructing the load to move from said first position to said second position and by the position-detecting means, said third control element comprising a third relay for controlling the forward and reverse rotations of the motor.
Claim 5
Dependent Claim
23 words
A motor-controlling device according to claim 1, in which said third control element further comprises a means for driving a knife and wiper.
Claim 6
Dependent Claim
62 words
A motor-controlling device according to claim 4, in which excitation of the third control element is controlled through an instruction switch for instructing the load to move from said first position to said second position and through the position-detecting means, said third control element comprising a third relay for controlling a circuit which energizes a solenoid to drive the knife and wiper.
Claim 7
Dependent Claim
87 words
A motor-controlling device according to claim 4, in which said third control element comprises a third relay whose excitation is controlled through a switch for instructing the load to move, a thyristor which is controlled through a switch for detecting the first load position and through a contact of the third relay and connected to a circuit for energizing a solenoid for the knife, and a capacitor whose charging operation is controlled through the contact of said third relay and which controls the conduction of said thyristor.
Claim 8
Dependent Claim
25 words
A motor-controlling device according to claim 1, in which said third control element further comprises a safety means for limiting the movement of the load.
Claim 9
Dependent Claim
90 words
A motor-controlling device according to claim 7, in which said third control element is inserted between the second control element including a second relay and a switch for the position-detecting means, said third control element comprising a switch operated according to load positions and a third relay which is excited by a switch for instructing the load to move from first to second position and by the position-detecting means, said third relay controlling a circuit for energizing a solenoid for a safety means which limits the movement of the load.
Claim 10
Dependent Claim
62 words
A motor-controlling device according to claim 1, comprising an operating lever for a clutch system capable of a free stroke without giving any electrical signal to any of the control elements, in addition to and in the same direction as a regular stroke for coupling a load shaft with a driving shaft of the motor which is interposed between said two shafts.
Claim 11
Dependent Claim
62 words
A motor-controlling device according to claim 9, in which an operating lever for a clutch system added to the motor has a first stroke for mechanically coupling a driving shaft of said motor to a load shaft, a second stroke for instructing the load shaft and driving shaft to be coupled with each other, and a third stroke for stopping the load.
Claim 12
Dependent Claim
35 words
A motor-controlling device according to claim 10, in which said motor is provided with an operating lever for a clutch system with a plurality of continuously variable strokes with independently adjustable lengths and operational forces.
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |