Patent US3646375A successfully refreshed from Google Patents.
US3646375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motorized potentiometer with overload clutch and interchangeable gear ratio
Assignee: Dale Electronics Inc
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Filing: 1970-12-30
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Granted: 1972-02-29
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Expires: 1990-12-30
Abstract
Abstract A compact gear motor having a planetary differential gear reduction system and an overload clutch which can be manually adjustable for clutch torque. The gear train accommodates interchangeable gears in order to change the output speed of the device. The gear motor drives a rotatable load such as a potentiometer, which is removably mounted directly to a hinged plastic motor housing.
Inventors
- 👤 Lawrence Mader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:24
CPC Classifications
H; H01; H01C; H01C10/00; H01C10/14; H02; H02K; H02K19/00; H02K19/02; H02K19/04; H02K19/08; H02K7/00; H02K7/10; H02K7/108
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
127 words
A motor-potentiometer combination comprising a housing, a reversible motor having a stator mounted in said housing, a rotor mounted within said stator, a pinion coupled to said rotor, a planet gear, two side-by-side peripheral internal gears concentrically mounted within said stator, said planet gear being meshed with said pinion and said side-by-side peripheral internal gears, said internal gears being of equal diameter but having an unequal number of teeth, an output shaft operatively connected to one of said internal gears, a friction clutch operatively connected to the other of said internal gears, means frictionally biasing said clutch to said stator, and a potentiometer provided with a means for removably attaching said potentiometer to said housing and removably coupling said potentiometer to said output shaft of said motor.
Claim 2
Dependent Claim
127 words
A motor-potentiometer combination comprising a housing, a reversible motor having a stator mounted in said housing, a rotor mounted within said stator, a pinion coupled to said rotor, a planet gear, two side-by-side peripheral internal gears concentrically mounted within said stator, said planet gear being meshed with said pinion and said side-by-side peripheral internal gears, said internal gears being of equal diameter but having an unequal number of teeth, an output shaft operatively connected to one of said internal gears, a friction clutch operatively connected to the other of said internal gears, means frictionally biasing said clutch to said stator, and a potentiometer provided with a means for removably attaching said potentiometer to said housing and removably coupling said potentiometer to said output shaft of said motor.
Claim 3
Dependent Claim
29 words
A motor-potentiometer as claimed in claim 1 wherein a pinion and a planet gear of different diameters may be substituted respectively for said pinion and the said planet gear.
Claim 4
Dependent Claim
18 words
A motor-potentiometer combination as claimed in claim 1 wherein said means for biasing said clutch is a spring.
Claim 5
Dependent Claim
17 words
A motor-potentiometer combination as claimed in claim 1 further comprising means for manually adjusting the clutch torque.
Claim 6
Dependent Claim
62 words
A motor-potentiometer combination as claimed in claim 1 wherein said means for removably attaching said potentiometer to said housing is a flat plate, and a recess at one end of said housing provided with webbed portions, said flat plate being inserted in said recess and parts thereof being captured under said webbed portions to thereby removably hold said potentiometer on said housing.
Claim 7
Dependent Claim
31 words
A motor-potentiometer combination as claimed in claim 1 wherein said means for coupling said potentiometer to the output shaft of said motor is a slotted shaft which embraces said output shaft.
Claim 8
Dependent Claim
58 words
A motor-potentiometer combination as claimed in claim 1 wherein said housing is constituted of two semicylindrical shells, a hinge connecting said shells, and means on said shells for removably engaging the stator of said motor when said motor is inserted within the shells of said housing and said shells are pivoted on said hinge to a closed position.
Claim 9
Dependent Claim
51 words
A motor-potentiometer combination as claimed in claim 7 wherein said shells are each provided with a mating opening for said output shaft, a recess in each of said shells adjacent to said mating opening, said combined recesses corresponding in shape to said means for removably attaching said potentiometer to said housing.
Claim 10
Dependent Claim
36 words
A motor-potentiometer combination as claimed in claim 7 wherein said motor is provided with terminals, and cutouts in said shells for accommodating said terminals when said shells are pivoted on said hinge to their closed position.
Claim 11
Dependent Claim
59 words
A motor-potentiometer combination as claimed in claim 7 wherein said stator has a coil form, a terminal post integrally formed with said coil form, a recess in said terminal post, and the means on said shells are tits that engage in the recess on said terminal post when said shells are pivoted on said hinge to a closed position.
Claim 12
Dependent Claim
56 words
A motor-potentiometer combination as claimed in claim 4 wherein said means for manually adjusting the clutch torque is a threaded screw located in the central bore of said stator, said screw engaging the remote end of a spring and being rotatable to vary the compression thereof, thereby increasing the normal force indirectly transmitted to the clutch.
Claim 13
Dependent Claim
111 words
A gearmotor for driving a rotatable load comprising a housing, a reversible motor having a stator mounted in said housing, a rotor mounted within said stator, a pinion coupled to said rotor, a planet gear, two side-by-side peripheral internal gears, said internal gears being of equal diameter but having an unequal number of teeth, an output shaft operatively connected to one of said internal gears, a friction clutch operatively connected to the other of said internal gears, means frictionally biasing said clutch to said stator, said rotatable load being provided with means for attaching said load to said housing and removably coupling said load to the output shaft of said motor.
Claim 14
Dependent Claim
111 words
A gearmotor for driving a rotatable load comprising a housing, a reversible motor having a stator mounted in said housing, a rotor mounted within said stator, a pinion coupled to said rotor, a planet gear, two side-by-side peripheral internal gears, said internal gears being of equal diameter but having an unequal number of teeth, an output shaft operatively connected to one of said internal gears, a friction clutch operatively connected to the other of said internal gears, means frictionally biasing said clutch to said stator, said rotatable load being provided with means for attaching said load to said housing and removably coupling said load to the output shaft of said motor.
Claim 15
Dependent Claim
28 words
A gearmotor as claimed in claim 12 wherein a pinion and a planet gear of different diameters may be substituted respectively for said pinion and said planet gear.
Claim 16
Dependent Claim
16 words
A gearmotor as claimed in claim 12 further comprising means for manually adjusting the clutch torque.
Claim 17
Dependent Claim
96 words
A gearmotor for use in driving a rotatable load comprising a housing, a reversible motor having a stator mounted in said housing, a rotor mounted within said stator, a pinion coupled to said rotor, a planet gear, two side-by-side peripheral internal gears concentrically mounted within said stator, said planet gear being meshed with said pinion and said side-by-side internal gears, the latter being of equal diameter but having an unequal number of teeth, a clutch operatively connected to one of said internal gears, and an output shaft operatively connected to the other of said internal gears.
Claim 18
Dependent Claim
96 words
A gearmotor for use in driving a rotatable load comprising a housing, a reversible motor having a stator mounted in said housing, a rotor mounted within said stator, a pinion coupled to said rotor, a planet gear, two side-by-side peripheral internal gears concentrically mounted within said stator, said planet gear being meshed with said pinion and said side-by-side internal gears, the latter being of equal diameter but having an unequal number of teeth, a clutch operatively connected to one of said internal gears, and an output shaft operatively connected to the other of said internal gears.
Claim 19
Dependent Claim
28 words
A gearmotor as claimed in claim 15 wherein a pinion and a planet gear of different diameters may be substituted respectively for said pinion and said planet gear.
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |