US3066202A - Inertia sensitive snap switch - Google Patents

Inertia sensitive snap switch Download PDF

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Publication number
US3066202A
US3066202A US37646A US3764660A US3066202A US 3066202 A US3066202 A US 3066202A US 37646 A US37646 A US 37646A US 3764660 A US3764660 A US 3764660A US 3066202 A US3066202 A US 3066202A
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United States
Prior art keywords
plunger
switch
pendulum
inertia sensitive
housing
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Expired - Lifetime
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US37646A
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Joseph J Kaleba
Frederick R Beck
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Controls Company of America
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Controls Company of America
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Publication date
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Priority to US37646A priority Critical patent/US3066202A/en
Application granted granted Critical
Publication of US3066202A publication Critical patent/US3066202A/en
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Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/14—Switches operated by change of acceleration, e.g. by shock or vibration, inertia switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/14—Switches operated by change of acceleration, e.g. by shock or vibration, inertia switch
    • H01H35/141—Details
    • H01H35/143—Resetting means

Definitions

  • This invention relates to an inertia sensitive device particularly for sensing objectionable vibrations in rotating devices.
  • Washing machines particularly of the horizontal type, are subject to objectionable vibrations due to an unbalancing of the clothes within the rotating drum. At high rotational speeds, these vibrations can cause considerable damage to the machine if the machine is not turned off. In the horizontal type machines, there is no convenient point to mount a simple snap switch to sense these vibrations since the vibration may occur in any horizontal or vertical direction.
  • the primary object of the present invention is to provide a simple mechanism for detecting objectionable vibrations in machines.
  • FIG. 1 is a front elevation partly in section of the switch.
  • FIG. 2 is similar to FIG. 1 with the snap switch thrown.
  • FIG. 3 is taken on line 3-3 of FIG. 1 showing the reset button construction.
  • the inertia sensitive mechanism includes a conventional type snap switch secured to bracket 12 by bolts 14 and having a single blade 16 normally biased to engage upper, fixed contact 17 by compressed band spring 18 acting downward on tongue 20.
  • the switch is connected in series through the blade and contact 17 with a washing machine motor.
  • the blade is snapped into engagement with contact 19 opening the motor circuit by the upward motion of trip plunger 22 moving tongue 20 upward compressing spring 18 so that the force of the spring on the blade will reverse and snap the blade downward when the tongue is moved over center.
  • Reset button 21 is provided with stub shaft 26, which projects into aperture 28 in the upper end of trip plunger to provide a lost motion connection between the reset plunger and the trip plunger.
  • Flanges 25 and 27 limit the upward and downward motion of the reset plunger and the trip plunger, respectively.
  • the lower end of the trip plunger is conically shaped to cooperate with conical indentation 29 provided in the upper end of the pivot member 34 which is provided with a spherical portion seating in spherical socket 32 to support pendulum rod 30 in a ball and socket type pivot.
  • the pendulum rod 30 carries weight 38 so the weight can swing in any direction.
  • Spring 40 is compressed becompression can be adjusted to vary the sensitivity of l l U the pendulum to vibrations by adjusting nut 42 and lock nut 44.
  • the device may be positionedin any location within 3,066,202 Patented Nov. 27, 1962 the washing machine housing, preferably where it can be conveniently reached for resetting.
  • the pendulum tends to remain at rest (in space) and since the bracket is fixed to the machine, the vibration of the machine will cause the bracket to move relative to the pendulum.
  • the elfect will be as if the pendulum rocked to cam plunger 22 upwardly to trip switch 10 and interrupt power to the machine.
  • the vibration is vertical, the effect will be as if the pendulum moved up to push plunger 22 up to trip the switch.
  • the switch requires resetting. Contact 19 could be left open or placed in an alarm circuit.
  • An inertia sensitive device comprising, a housing, switch means mounted in the housing normally biased in a circuit closing direction, means for tripping the switch in a circuit opening direction in response to vibrations in the housing of a predetermined amplitude, said tripping means including a plunger limited to axial motion, said plunger having a conical end member, a pendulum movable in any direction relative to the housing and having a conical indentation operatively engaging the conical end member of the plunger, and an adjustable spring means controlling the movement of the pendulum relative to the housing whereby movements of the pendulum relative to the housing of a predetermined amplitude will move the plunger and trip the switch.
  • An inertia sensitive device comprising, a housing, switch means mounted in the housing normally biased in a circuit closing direction, means for tripping the switch in a circuit opening direction in response to vibrations in the housing of a predetermined amplitude, said tripping means including a plunger limited to axial motion and a pendulum movable in any direction relative to the housing and operatively engaging the plunger whereby movements of the pendulum relative to the housing of a predetermined amplitude will move the plunger and trip the switch, and reset means operatively engaging the plunger to reset the switch, said reset means including a lost motion connection for engaging the plunger.
  • An inertia sensitive device according to claim 2 wherein said plunger includes a conical end member which cooperates with a conical indentation in the pendulum to translate the lateral motions of the pendulum to axial movements in the plunger.
  • An inertia sensitive device including an adjustable springs means for controlling the movement of the pendulum relative to the housing.

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  • Control Of Washing Machine And Dryer (AREA)

Description

Yaw-653' SR gmgmmg M .XR 3,066,202 1962 J. J. KALEBA EIAL 3,066,202
INERTIA SENSITIVE SNAP SWITCH Filed June 21, 1960 INVENTORS JOSEPH J. KALEBA BY FREDEJMQK R CK \4 ATTORNEY tween washer 46 on shaft 30 and the bracket 12 and the United States Patent 3,066,202 INERTIA SENSITIVE SNAP SWITCH Joseph J. Kaleba, Roselle. and Frederick R. Beck, Maywood, 111.. assignors to Controls Company of America, Schiller Park. Ill., a corporation of Delaware Filed June 21, 1960, Ser. No. 37,646 4 Claims. (Cl. 200-61.5)
This invention relates to an inertia sensitive device particularly for sensing objectionable vibrations in rotating devices.
Washing machines, particularly of the horizontal type, are subject to objectionable vibrations due to an unbalancing of the clothes within the rotating drum. At high rotational speeds, these vibrations can cause considerable damage to the machine if the machine is not turned off. In the horizontal type machines, there is no convenient point to mount a simple snap switch to sense these vibrations since the vibration may occur in any horizontal or vertical direction.
The primary object of the present invention is to provide a simple mechanism for detecting objectionable vibrations in machines.
Other objects and advantages will be pointed out in, or be apparent from, the specification and claims, as will obvious modifications of the single embodiment shown in the drawings, in which:
FIG. 1 is a front elevation partly in section of the switch.
FIG. 2 is similar to FIG. 1 with the snap switch thrown.
FIG. 3 is taken on line 3-3 of FIG. 1 showing the reset button construction.
The inertia sensitive mechanism includes a conventional type snap switch secured to bracket 12 by bolts 14 and having a single blade 16 normally biased to engage upper, fixed contact 17 by compressed band spring 18 acting downward on tongue 20. The switch is connected in series through the blade and contact 17 with a washing machine motor. The blade is snapped into engagement with contact 19 opening the motor circuit by the upward motion of trip plunger 22 moving tongue 20 upward compressing spring 18 so that the force of the spring on the blade will reverse and snap the blade downward when the tongue is moved over center. Reset button 21 is provided with stub shaft 26, which projects into aperture 28 in the upper end of trip plunger to provide a lost motion connection between the reset plunger and the trip plunger. Flanges 25 and 27 limit the upward and downward motion of the reset plunger and the trip plunger, respectively.
The lower end of the trip plunger is conically shaped to cooperate with conical indentation 29 provided in the upper end of the pivot member 34 which is provided with a spherical portion seating in spherical socket 32 to support pendulum rod 30 in a ball and socket type pivot. The pendulum rod 30 carries weight 38 so the weight can swing in any direction. Spring 40 is compressed becompression can be adjusted to vary the sensitivity of l l U the pendulum to vibrations by adjusting nut 42 and lock nut 44.
The device may be positionedin any location within 3,066,202 Patented Nov. 27, 1962 the washing machine housing, preferably where it can be conveniently reached for resetting. The pendulum tends to remain at rest (in space) and since the bracket is fixed to the machine, the vibration of the machine will cause the bracket to move relative to the pendulum. When the horizontal amplitude of motion becomes great enough, the elfect will be as if the pendulum rocked to cam plunger 22 upwardly to trip switch 10 and interrupt power to the machine. If the vibration is vertical, the effect will be as if the pendulum moved up to push plunger 22 up to trip the switch. The switch requires resetting. Contact 19 could be left open or placed in an alarm circuit.
Although but a single embodiment of the present invention has been illustrated and described, it will be apparent to those skilled in the art that various changes and modifications may be made therein without departing from the spirit of the invention or from the scope of the appended claims.
We claim:
1. An inertia sensitive device comprising, a housing, switch means mounted in the housing normally biased in a circuit closing direction, means for tripping the switch in a circuit opening direction in response to vibrations in the housing of a predetermined amplitude, said tripping means including a plunger limited to axial motion, said plunger having a conical end member, a pendulum movable in any direction relative to the housing and having a conical indentation operatively engaging the conical end member of the plunger, and an adjustable spring means controlling the movement of the pendulum relative to the housing whereby movements of the pendulum relative to the housing of a predetermined amplitude will move the plunger and trip the switch.
2. An inertia sensitive device comprising, a housing, switch means mounted in the housing normally biased in a circuit closing direction, means for tripping the switch in a circuit opening direction in response to vibrations in the housing of a predetermined amplitude, said tripping means including a plunger limited to axial motion and a pendulum movable in any direction relative to the housing and operatively engaging the plunger whereby movements of the pendulum relative to the housing of a predetermined amplitude will move the plunger and trip the switch, and reset means operatively engaging the plunger to reset the switch, said reset means including a lost motion connection for engaging the plunger.
3. An inertia sensitive device according to claim 2 wherein said plunger includes a conical end member which cooperates with a conical indentation in the pendulum to translate the lateral motions of the pendulum to axial movements in the plunger.
4. An inertia sensitive device according to claim 3 including an adjustable springs means for controlling the movement of the pendulum relative to the housing.
References Cited in the file of this patent UNITED STATES PATENTS 2,176,770 Maught Oct. 17, 1939 2,768,256 Barecki et al Oct. 23, 1956 2,778,896 Tollefsen Jan. 22, 1957 2,783,321 Richardson Feb. 26, 1957 2,784,584 Worst Mar. 12, 1957 2,916,573 Loiselle Dec. 8, .1959
US37646A 1960-06-21 1960-06-21 Inertia sensitive snap switch Expired - Lifetime US3066202A (en)

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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3437167A (en) * 1967-01-03 1969-04-08 Eaton Yale & Towne Vehicle speed control mechanism
US3488462A (en) * 1967-01-28 1970-01-06 Fiat Spa Inertia electric switch
US3498217A (en) * 1967-03-11 1970-03-03 Heidelberger Druckmasch Ag Safety device for machines having oppositely rotating cylinders
US3625178A (en) * 1970-08-24 1971-12-07 Gen Motors Corp Bidirectional sensor
US3745277A (en) * 1972-07-10 1973-07-10 G Shawcross Impact fire protective switch for motor vehicles
JPS48108163U (en) * 1972-03-17 1973-12-14
FR2201461A1 (en) * 1972-09-29 1974-04-26 Guardian Industries
US3898400A (en) * 1972-11-29 1975-08-05 Takata Kojyo Co Pendulum type inertia switch
US3963888A (en) * 1975-02-28 1976-06-15 Riede Systems, Inc. Multi-angle tilt switch device with adjustable oscillating controller
US4287398A (en) * 1979-07-30 1981-09-01 American Safety Equipment Corporation Inertia switches
US4336426A (en) * 1980-09-05 1982-06-22 Cherry Electrical Products Corporation Inertia switch
US4378475A (en) * 1982-03-02 1983-03-29 Mcniel Frederick A Velocity sensitive impact switch
WO1983002196A1 (en) * 1981-12-15 1983-06-23 Jackman, Peter, Ronald An inertia switch device
US4755653A (en) * 1987-01-05 1988-07-05 Arvin Industries, Inc. Heater with alert indicator
US5003162A (en) * 1987-01-05 1991-03-26 Arvin Industries, Inc. Heater with alert indicator
US5003190A (en) * 1987-08-06 1991-03-26 Robert Bosch Gmbh Acceleration pickup, especially for release of occupant protecting devices in the event of accident
US5007103A (en) * 1988-10-21 1991-04-09 Rival Manufacturing Company Automatic shut-off and alarm for electric heater
US5038006A (en) * 1990-03-21 1991-08-06 Lowe Sr Alvin E Electrical switch
US8766118B2 (en) 2010-11-17 2014-07-01 Colin Johnstone Seismic actuator

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2176770A (en) * 1937-06-15 1939-10-17 John A Maught Circuit breaker
US2768256A (en) * 1955-01-06 1956-10-23 American Seating Co Inertia-operated electric switch
US2778896A (en) * 1955-01-24 1957-01-22 Tollefsen Reed Automatic controllable "g" impact switch
US2783321A (en) * 1955-11-02 1957-02-26 Roland A Richardson Electric switches of the shock operated type
US2784584A (en) * 1956-03-12 1957-03-12 Gen Electric Resetting device for vibration switches of laundry machines
US2916573A (en) * 1957-04-02 1959-12-08 Loiselle Henry Louis Tractor safety switch

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2176770A (en) * 1937-06-15 1939-10-17 John A Maught Circuit breaker
US2768256A (en) * 1955-01-06 1956-10-23 American Seating Co Inertia-operated electric switch
US2778896A (en) * 1955-01-24 1957-01-22 Tollefsen Reed Automatic controllable "g" impact switch
US2783321A (en) * 1955-11-02 1957-02-26 Roland A Richardson Electric switches of the shock operated type
US2784584A (en) * 1956-03-12 1957-03-12 Gen Electric Resetting device for vibration switches of laundry machines
US2916573A (en) * 1957-04-02 1959-12-08 Loiselle Henry Louis Tractor safety switch

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3437167A (en) * 1967-01-03 1969-04-08 Eaton Yale & Towne Vehicle speed control mechanism
US3488462A (en) * 1967-01-28 1970-01-06 Fiat Spa Inertia electric switch
US3498217A (en) * 1967-03-11 1970-03-03 Heidelberger Druckmasch Ag Safety device for machines having oppositely rotating cylinders
US3625178A (en) * 1970-08-24 1971-12-07 Gen Motors Corp Bidirectional sensor
JPS48108163U (en) * 1972-03-17 1973-12-14
US3745277A (en) * 1972-07-10 1973-07-10 G Shawcross Impact fire protective switch for motor vehicles
FR2201461A1 (en) * 1972-09-29 1974-04-26 Guardian Industries
US3862386A (en) * 1972-09-29 1975-01-21 Guardian Industries Snap action type inertia switch with vibration amplication and actuator means
US3898400A (en) * 1972-11-29 1975-08-05 Takata Kojyo Co Pendulum type inertia switch
US3963888A (en) * 1975-02-28 1976-06-15 Riede Systems, Inc. Multi-angle tilt switch device with adjustable oscillating controller
US4287398A (en) * 1979-07-30 1981-09-01 American Safety Equipment Corporation Inertia switches
US4336426A (en) * 1980-09-05 1982-06-22 Cherry Electrical Products Corporation Inertia switch
WO1983002196A1 (en) * 1981-12-15 1983-06-23 Jackman, Peter, Ronald An inertia switch device
US4533801A (en) * 1981-12-15 1985-08-06 First Inertia Switch Limited Inertia switch device
US4378475A (en) * 1982-03-02 1983-03-29 Mcniel Frederick A Velocity sensitive impact switch
US4755653A (en) * 1987-01-05 1988-07-05 Arvin Industries, Inc. Heater with alert indicator
US5003162A (en) * 1987-01-05 1991-03-26 Arvin Industries, Inc. Heater with alert indicator
US5003190A (en) * 1987-08-06 1991-03-26 Robert Bosch Gmbh Acceleration pickup, especially for release of occupant protecting devices in the event of accident
US5007103A (en) * 1988-10-21 1991-04-09 Rival Manufacturing Company Automatic shut-off and alarm for electric heater
US5038006A (en) * 1990-03-21 1991-08-06 Lowe Sr Alvin E Electrical switch
US8766118B2 (en) 2010-11-17 2014-07-01 Colin Johnstone Seismic actuator
US9449773B2 (en) 2010-11-17 2016-09-20 Colin Johnstone Seismic actuator

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