US3521095A - Motorized potentiometer - Google Patents

Motorized potentiometer Download PDF

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Publication number
US3521095A
US3521095A US741554A US3521095DA US3521095A US 3521095 A US3521095 A US 3521095A US 741554 A US741554 A US 741554A US 3521095D A US3521095D A US 3521095DA US 3521095 A US3521095 A US 3521095A
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Prior art keywords
potentiometer
motor
core
gear train
magnetic
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Expired - Lifetime
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US741554A
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Dominic J Russo
Yankton S Dak
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Dale Electronics Inc
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Dale Electronics Inc
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Assigned to NATIONAL ASSOCIATION, BANK HAPOALIM, B.M. AND BAN LEUMI, B.M., MANUFACTURERS BANK OF DETROIT, A NATIONAL BANKING ASSOCIATION AS AGENT FOR AND IN BEHALF OF MANUFACTURERS NATIONAL BANK OF DETROIT, FIRST PENNSYLVANIA BANK, N.A., PROVIDENT NATIONAL BANK, MELLON BANK (EAST), NA reassignment NATIONAL ASSOCIATION, BANK HAPOALIM, B.M. AND BAN LEUMI, B.M. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DALE ELECTRONICS, INC., A CORP. OF DE.
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/12—Structural association with clutches, brakes, gears, pulleys or mechanical starters with auxiliary limited movement of stators, rotors or core parts, e.g. rotors axially movable for the purpose of clutching or braking
    • H02K7/125—Structural association with clutches, brakes, gears, pulleys or mechanical starters with auxiliary limited movement of stators, rotors or core parts, e.g. rotors axially movable for the purpose of clutching or braking magnetically influenced
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/14—Adjustable resistors adjustable by auxiliary driving means

Definitions

  • a motor-potentiometer combination in which the motor drive can be disconnected from the potentiometer when manual operation of the potentiometer is desired.
  • the magnetic core of the rear pole piece assembly is integral and functions as a solenoid plunger and when electrically actuated moves the normally disconnected motor gear train and potentiometer gear train into engagement.
  • the core has an elongated non-magnetic extension. The latter together with the magnetic core and rotor shaft are mounted along the central axis of the housing.
  • This invention relates to a motorized potentiometer in which the motor engages the gear train only when the motor is energized. When the motor is deenergized the potentiometer is free of the motor and its gear train and is adaptable for manual adjustment.
  • stator and a portion of the core piece into one movable part to permit movement within the fixed stator, and thereby utilize the core as a solenoid plunger to slide a pinion of the motor into driving engagement with the potentiometer.
  • the core of the pole piece is moved in the opposite direction the pinion of the motor is withdrawn from driving engagement with the potentiometer, and the latter may be adjusted manually.
  • Another object of the present invention is to provide the solenoid plunger with a metallic ring, preferably of copper, to create a shaded pole effect which results in a more efficient motor.
  • FIG. 1 is a cross-sectional view of motor-potentiometer combination constructed in accordance with the teachings of the present invention; and with the motor gear train disengaged from the potentiometer gear train;
  • FIG. 2 is a cross-sectional view of the motor-potentiometer combination similar to the view shown in FIG. 1, but with certain parts removed, and with the motor gear train engaged with the potentiometer gear train; and
  • FIG. 3 is a transverse section taken along the lines 3-3 of FIG. 1.
  • the present motorpotentiometer combination comprises a motor housing 10 and a potentiometer and gear train casing 12 which are co-extensive.
  • stators 14 and 16A and 16B Mounted in the motor housing 10 are stators 14 and 16A and 16B and a rotor 18.
  • the coils of the stators 14 and 16 are shown as A and B respectively.
  • electrical terminals for the stators A and B are designated by reference numerals 15 and 17 respectively.
  • a cylindrical magnetic core 20 has a yoke portion 22 attached to it and forms the rear pole piece assembly. Core 20 is formed in a manner to permit it to move within the fixed stator 14 parallel to the longitudinal axis of the motor and in the directions of the double-headed arrow C.
  • the cylindrical magnetic core which functions in the manner of a solenoid plunger is provided with a non-magnetic pin-like extension 24 which also extends parallel to the longitudinal axis of the motor.
  • a non-magnetic pin-like extension 24 which also extends parallel to the longitudinal axis of the motor.
  • the slidable rotor shaft 26 Mounted co-axially with non-magnetic extension 24 is the slidable rotor shaft 26. The latter also extends through a bore 28 in the stator 16 and is freely shiftable therein.
  • An abutment member 30 is located in the center of the two poles of the stator 14 and part thereof.
  • Mounted on the non-magnetic extension 24 between the slidable magnetic core 20 and the abutment member 30 is a non-magnetic, anti-shick washer 58.
  • a metallic ring 3-2 such as copper creates a shaded pole effect for the motor, and thereby makes the same a more powerful, smoother running motor.
  • Attached to the end of the rotor shaft 26 remote from extension 24 are motor gears 34, 36, 38 and 40.
  • Gear 40 has coupling pins 42 projecting from a front surface thereof which are adapted to be engaged in adjacent openings 44 arranged circularly on a part 46 of the gear 48 of the gear train of the potentiometer P.
  • the potentiometer gear train also includes gears 50, 52 and 54 respectively.
  • the motor is disconnected from the potentiometer P in FIG. 1 and connected to the potentiometer as shown in FIG. 2.
  • the cylindrical magnetic core 20 has slid to the right by magnetic flux produced upon the application of voltages to the coil A of the stator 14.
  • the non-magnetic extension 24 pushes the rotor shaft 26 also to the right causing the pins 42 of the gear 40 to seat in the adjacent holes 44 of part 46 of gear 48 in the potentiometer gear train.
  • the motor is drivingly connected to the potentiometer P.
  • a spring 56 engages at one end the part 46 and engages at the other end the gear 42. Therefore, the spring 56 normally urges the rotor shaft 26, the extension 24 and the cylindrical magnetic core 20 to the left whereby the assembly normally assumes the position shown in FIG. 1 with the motor and potentiometer P disengaged.
  • the present motor-potentiometer combination has the desirable attribute of permitting the potentiometer to be manually operated without the drag of the rotor shaft and the motor gear train.
  • the present construction having fewer parts than other known structures, is less expensive to manufacture and more reliable in operation.
  • a motor-potentiometer combination wherein both said motor and potentiometer have associated gear trains comprising; a housing, a rotor and a stator mounted in said housing; a rear pole piece assembly in said housing having a core; an elongated non-magnetic extension mounted on said core substantially co-axially therewith and slidably movable with said core along the longitudinal axis of said housing when said stator is electrically actuated; a rotor shaft mounted for sliding movement in said housing, said elongated extension and rotor shaft abutting each other in an end-to-end relationship; a pinion on the other end of said rotor shaft having means for drivingly engaging the gear train associated with said potentiometer when said core is moved in one direction and disengaging said gear train associated with said potentiometer when said core is moved in the opposite direction; said magnetic core of the rear pole piece assembly, said elongated non-magnetic extension, and said rotor shaft being mounted along the central axis of said housing;
  • a motor-potentiometer combination as claimed in claim 1 further comprising a metallic ring mounted on the core of said rear pole piece and adjacent to said stator for creating a shaded pole effect for said motor.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Description

July 21, 1970 0. J. RUSSO MOTORIZED POTENTIOMETER 2 Sheets-Sheet 1 Filed July 1, 1968 I INVENTOR Jaw/we J Pz/sso WW/M2 ATTORNEYS July 21, 1970 D. J. RUSSO MOTORIZED POTENTIOMETER 2 Sheets-Sheet 2 Filed Julyl, 1968 INVENTO R )ww/wc (ma/55a ATTORNEYS United States Patent 3,521,095 MOTORIZED POTENTIOMETER Dominic J. Russo, Yankton, S. Dak., assignor to Dale Electronics, Inc., Columbus, Nebr., a corporation of Nebraska Filed July 1, 1968, Ser. No. 741,554 Int. Cl. H02k 7/10 US. Cl. 310-83 4 Claims ABSTRACT OF THE DISCLOSURE A motor-potentiometer combination in which the motor drive can be disconnected from the potentiometer when manual operation of the potentiometer is desired. The magnetic core of the rear pole piece assembly is integral and functions as a solenoid plunger and when electrically actuated moves the normally disconnected motor gear train and potentiometer gear train into engagement. The core has an elongated non-magnetic extension. The latter together with the magnetic core and rotor shaft are mounted along the central axis of the housing.
This invention relates to a motorized potentiometer in which the motor engages the gear train only when the motor is energized. When the motor is deenergized the potentiometer is free of the motor and its gear train and is adaptable for manual adjustment.
It is an object of the present invention to form the stator and a portion of the core piece into one movable part to permit movement within the fixed stator, and thereby utilize the core as a solenoid plunger to slide a pinion of the motor into driving engagement with the potentiometer. When the core of the pole piece is moved in the opposite direction the pinion of the motor is withdrawn from driving engagement with the potentiometer, and the latter may be adjusted manually.
Another object of the present invention is to provide the solenoid plunger with a metallic ring, preferably of copper, to create a shaded pole effect which results in a more efficient motor.
It is still another object of the present invention to provide a motorized potentiometer having fewer parts than previous constructions, thereby making the same relatively inexpensive to manufacture and having a higher degree of reliability.
It is a further object of the present invention to-have a complete magnetic path between the core and pole pieces. This construction reduces the magnetic losses in the motor thereby making the motor more powerful and permitting the motor to run cooler.
The invention is illustrated by way of example in the accompanying drawings which form part of the application and in which:
FIG. 1 is a cross-sectional view of motor-potentiometer combination constructed in accordance with the teachings of the present invention; and with the motor gear train disengaged from the potentiometer gear train;
FIG. 2 is a cross-sectional view of the motor-potentiometer combination similar to the view shown in FIG. 1, but with certain parts removed, and with the motor gear train engaged with the potentiometer gear train; and
FIG. 3 is a transverse section taken along the lines 3-3 of FIG. 1.
Referring to the drawings, the present motorpotentiometer combination comprises a motor housing 10 and a potentiometer and gear train casing 12 which are co-extensive. Mounted in the motor housing 10 are stators 14 and 16A and 16B and a rotor 18. The coils of the stators 14 and 16 are shown as A and B respectively. In addition, electrical terminals for the stators A and B are designated by reference numerals 15 and 17 respectively. A cylindrical magnetic core 20 has a yoke portion 22 attached to it and forms the rear pole piece assembly. Core 20 is formed in a manner to permit it to move within the fixed stator 14 parallel to the longitudinal axis of the motor and in the directions of the double-headed arrow C. The cylindrical magnetic core which functions in the manner of a solenoid plunger is provided with a non-magnetic pin-like extension 24 which also extends parallel to the longitudinal axis of the motor. Mounted co-axially with non-magnetic extension 24 is the slidable rotor shaft 26. The latter also extends through a bore 28 in the stator 16 and is freely shiftable therein. An abutment member 30 is located in the center of the two poles of the stator 14 and part thereof. Mounted on the non-magnetic extension 24 between the slidable magnetic core 20 and the abutment member 30 is a non-magnetic, anti-shick washer 58. A metallic ring 3-2 such as copper creates a shaded pole effect for the motor, and thereby makes the same a more powerful, smoother running motor. Attached to the end of the rotor shaft 26 remote from extension 24 are motor gears 34, 36, 38 and 40. Gear 40 has coupling pins 42 projecting from a front surface thereof which are adapted to be engaged in adjacent openings 44 arranged circularly on a part 46 of the gear 48 of the gear train of the potentiometer P. The potentiometer gear train also includes gears 50, 52 and 54 respectively.
As clearly seen in FIGS. 1 and 2, the motor is disconnected from the potentiometer P in FIG. 1 and connected to the potentiometer as shown in FIG. 2. In the latter event, the cylindrical magnetic core 20 has slid to the right by magnetic flux produced upon the application of voltages to the coil A of the stator 14. When this occurs, the non-magnetic extension 24 pushes the rotor shaft 26 also to the right causing the pins 42 of the gear 40 to seat in the adjacent holes 44 of part 46 of gear 48 in the potentiometer gear train. Thus, the motor is drivingly connected to the potentiometer P. A spring 56 engages at one end the part 46 and engages at the other end the gear 42. Therefore, the spring 56 normally urges the rotor shaft 26, the extension 24 and the cylindrical magnetic core 20 to the left whereby the assembly normally assumes the position shown in FIG. 1 with the motor and potentiometer P disengaged.
It should be noted that the present motor-potentiometer combination has the desirable attribute of permitting the potentiometer to be manually operated without the drag of the rotor shaft and the motor gear train. In addition, the present construction, having fewer parts than other known structures, is less expensive to manufacture and more reliable in operation.
What is claimed is:
1. A motor-potentiometer combination, wherein both said motor and potentiometer have associated gear trains comprising; a housing, a rotor and a stator mounted in said housing; a rear pole piece assembly in said housing having a core; an elongated non-magnetic extension mounted on said core substantially co-axially therewith and slidably movable with said core along the longitudinal axis of said housing when said stator is electrically actuated; a rotor shaft mounted for sliding movement in said housing, said elongated extension and rotor shaft abutting each other in an end-to-end relationship; a pinion on the other end of said rotor shaft having means for drivingly engaging the gear train associated with said potentiometer when said core is moved in one direction and disengaging said gear train associated with said potentiometer when said core is moved in the opposite direction; said magnetic core of the rear pole piece assembly, said elongated non-magnetic extension, and said rotor shaft being mounted along the central axis of said housing; and a spring positioned between said potentiometer gear train and said motor gear train normally urging the means for drivingly engaging the potentiometer gear train out of engagement with the latter.
' 2. A motor-potentiometer combination as claimed in claim 1 further comprising a metallic ring mounted on the core of said rear pole piece and adjacent to said stator for creating a shaded pole effect for said motor.
3. A motor-potentiometer combination as claimed in claim 1 wherein said core and rear pole piece are integral. 4. A motor-potentiometer combination as claimed in claim 1 wherein said rear pole piece assembly is provided with an attached rear pole piece and core having a complete magnetic path between said core and said pole pieces.
References Cited UNITED STATES PATENTS MILTON O. HIRSHFIELD, Primary Examiner -R. SKUDY, Assistant Examiner US. Cl. X.R. 310-78; 89
US741554A 1968-07-01 1968-07-01 Motorized potentiometer Expired - Lifetime US3521095A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3646375A (en) * 1970-12-30 1972-02-29 Dale Electronics Motorized potentiometer with overload clutch and interchangeable gear ratio
US4125790A (en) * 1977-04-04 1978-11-14 Dresser Industries, Inc. Magnetic mechanical disconnect
US4315176A (en) * 1978-01-25 1982-02-09 Mitsubishi Denki Kabushiki Kaisha Electric motor
EP0364826A1 (en) * 1988-10-10 1990-04-25 Mes S.A. Actuator, particularly for locking and unlocking motor vehicle doors
US20050248435A1 (en) * 2004-05-05 2005-11-10 Donald Robertson Lawrence Actuator with integral position sensor
US20070008063A1 (en) * 2004-08-13 2007-01-11 Cts Corporation Rotary actuator with non-contacting position sensor
US20100207616A1 (en) * 2009-02-17 2010-08-19 Wolschlager Kevin C Rotary Position Sensor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1956041A (en) * 1932-01-27 1934-04-24 Diehl Mfg Co Electric motor
US2518009A (en) * 1946-09-21 1950-08-08 Bethlehem Steel Corp Coupling screwer
US3054304A (en) * 1957-12-05 1962-09-18 Jursik James Variably-coupled damper-stabilized servo
US3241385A (en) * 1962-06-22 1966-03-22 Lionel Toy Corp Torque actuated reversible gear reduction assembly
US3261999A (en) * 1964-05-22 1966-07-19 Int Register Co Electric motor construction

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1956041A (en) * 1932-01-27 1934-04-24 Diehl Mfg Co Electric motor
US2518009A (en) * 1946-09-21 1950-08-08 Bethlehem Steel Corp Coupling screwer
US3054304A (en) * 1957-12-05 1962-09-18 Jursik James Variably-coupled damper-stabilized servo
US3241385A (en) * 1962-06-22 1966-03-22 Lionel Toy Corp Torque actuated reversible gear reduction assembly
US3261999A (en) * 1964-05-22 1966-07-19 Int Register Co Electric motor construction

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3646375A (en) * 1970-12-30 1972-02-29 Dale Electronics Motorized potentiometer with overload clutch and interchangeable gear ratio
US4125790A (en) * 1977-04-04 1978-11-14 Dresser Industries, Inc. Magnetic mechanical disconnect
US4315176A (en) * 1978-01-25 1982-02-09 Mitsubishi Denki Kabushiki Kaisha Electric motor
EP0364826A1 (en) * 1988-10-10 1990-04-25 Mes S.A. Actuator, particularly for locking and unlocking motor vehicle doors
US20050248435A1 (en) * 2004-05-05 2005-11-10 Donald Robertson Lawrence Actuator with integral position sensor
US7116210B2 (en) * 2004-05-05 2006-10-03 Cts Corporation Actuator with integral position sensor
US20070008063A1 (en) * 2004-08-13 2007-01-11 Cts Corporation Rotary actuator with non-contacting position sensor
US20100207616A1 (en) * 2009-02-17 2010-08-19 Wolschlager Kevin C Rotary Position Sensor
US8450999B2 (en) 2009-02-17 2013-05-28 Cts Corporation Rotary position sensor
US8692544B2 (en) 2009-02-17 2014-04-08 Cts Corporation Rotary position sensor
US9297637B2 (en) 2009-02-17 2016-03-29 Cts Corporation Rotary position sensor

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AS Assignment

Owner name: NATIONAL ASSOCIATION, BANK HAPOALIM, B.M. AND BAN

Free format text: SECURITY INTEREST;ASSIGNOR:DALE ELECTRONICS, INC., A CORP. OF DE.;REEL/FRAME:004510/0078

Effective date: 19851031

Owner name: MANUFACTURERS BANK OF DETROIT, A NATIONAL BANKING

Free format text: SECURITY INTEREST;ASSIGNOR:DALE ELECTRONICS, INC., A CORP. OF DE.;REEL/FRAME:004510/0078

Effective date: 19851031