US3862444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Super speed clutch motor
Assignee: Union Special Corp
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Filing: 1973-02-12
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Granted: 1975-01-21
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Expires: 1993-02-12
Abstract
Abstract This disclosure relates to an electric transmitter for sewing machines and like machines which provides a greater revolution rate than that normally possible solely with an alternating current transmitter in the absence of gearing and like speed multipliers. The electric transmitter utilizes a plurality of motors serially connected with the motors being mounted in a single housing whereby the electric transmitter may be mounted in the normal manner and the clutch-brake thereof may remain of the conventional construction and be mechanically operative.
Inventors
- 👤 Arthur N Hale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:20
CPC Classifications
H; H02; H02K; H02K7/00; H02K7/10; H02K7/11
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
226 words
A high speed clutch-brake drive for intermittently driving a serving machine head, said drive comprising a fixed housing having means for mounting the same in fixed relation to a sewing machine head, at least two constantly rotating induction motors mounted within said housing, said motors having rotating components including a power shaft rotatably journalled relative to said housing, coupling means coupling rotating components of said motors for continuously driving said power shaft at a speed corresponding to the total of the speeds of said two motors and in excess of synchronous speed, a flywheel secured to said power shaft for continuous rotation therewith, an output shaft rotatably supported by said housing in axial alignment with said power shaft, a drive pulley carried by said output shaft for driving a sewing machine head, and a clutch-brake device carried by said housing for selectively coupling said output shaft to said flywheel for rotation therewith and for preventing rotation of said output shaft, said clutch-brake device including a fixed friction face spaced from and opposing said flywheel, a clutch disc coupled to said output shaft and having two friction engaging faces, said clutch disc being positioned between said flywheel and said fixed friction face and means mounting said clutch disc for selective engagement with said flywheel for rotation therewith and said fixed friction face for braking said clutch disc.
Claim 2
Dependent Claim
226 words
A high speed clutch-brake drive for intermittently driving a serving machine head, said drive comprising a fixed housing having means for mounting the same in fixed relation to a sewing machine head, at least two constantly rotating induction motors mounted within said housing, said motors having rotating components including a power shaft rotatably journalled relative to said housing, coupling means coupling rotating components of said motors for continuously driving said power shaft at a speed corresponding to the total of the speeds of said two motors and in excess of synchronous speed, a flywheel secured to said power shaft for continuous rotation therewith, an output shaft rotatably supported by said housing in axial alignment with said power shaft, a drive pulley carried by said output shaft for driving a sewing machine head, and a clutch-brake device carried by said housing for selectively coupling said output shaft to said flywheel for rotation therewith and for preventing rotation of said output shaft, said clutch-brake device including a fixed friction face spaced from and opposing said flywheel, a clutch disc coupled to said output shaft and having two friction engaging faces, said clutch disc being positioned between said flywheel and said fixed friction face and means mounting said clutch disc for selective engagement with said flywheel for rotation therewith and said fixed friction face for braking said clutch disc.
Claim 3
Dependent Claim
39 words
The drive of claim 1 wherein each of said motors includes a field and a rotor, and said coupling means including means coupling a field of one motor to a rotor of the other motor for rotation in unison.
Claim 4
Dependent Claim
64 words
The drive of claim 1 wherein each of said motors includes a field and a rotor, and said coupling means including means coupling a field of one motor to a rotor of the other motor for rotation in unison, the field of the other motor being fixedly secured to said housing and the rotor of said one motor being coupled to said power shaft.
Claim 5
Dependent Claim
18 words
The drive of claim 1 wherein said induction motors are squirrel-cage motors, and said rotors are shorted-bar rotors.
Claim 6
Dependent Claim
48 words
The drive of claim 1 wherein each of said motors includes a field and a rotor, and said coupling means including a tubular shaft disposed coaxially with Said power shaft and coupling a field of one motor to a rotor of the other motor for rotation in unison.
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) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |