US2697145A - Snap action device - Google Patents

Snap action device Download PDF

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Publication number
US2697145A
US2697145A US249272A US24927251A US2697145A US 2697145 A US2697145 A US 2697145A US 249272 A US249272 A US 249272A US 24927251 A US24927251 A US 24927251A US 2697145 A US2697145 A US 2697145A
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US
United States
Prior art keywords
members
spring
snap action
action device
stiffened
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US249272A
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English (en)
Inventor
Winet Hans
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Landis and Gyr AG
Original Assignee
Landis and Gyr AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Landis and Gyr AG filed Critical Landis and Gyr AG
Application granted granted Critical
Publication of US2697145A publication Critical patent/US2697145A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/26—Snap-action arrangements depending upon deformation of elastic members
    • H01H13/36—Snap-action arrangements depending upon deformation of elastic members using flexing of blade springs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18888—Reciprocating to or from oscillating
    • Y10T74/18896—Snap action
    • Y10T74/18904—Plate spring

Definitions

  • the present invention is a snap action device particularly as-adapted to-be usedin electric switches.
  • the invention consists in the novel parts, constructions, arrangements, combinations and improvements herein shownv and' described.
  • An object of the invention is to provide a novel snap action device which can be made from a single blank cheaply and easily.
  • a further object of the invention is to provide a novel snap action device which can readily be adapted to be used with electric switches, and similar devices.
  • Fig. l is a front sectional view showing the novel snap action device mounted in a tumbler switch with the snap action device shown in its normal position of rest.
  • Figs. 2-4 are front elevational views of the snap action device in a tumbler switch in various operative positions.
  • Fig. 4 illustrates the abnormal position in contrast to Fig. l, the normal or resting position.
  • Fig. 5 is a top plan view of the novel snap action device.
  • Fig. 6 is a sectional view of the embodiment shown in Fig. 5, as viewed along line 66.
  • Fig. 7 is a side elevational view of the embodiment shown in Fig. 5.
  • Figs. 8 to are diagrammatic representations of the trip spring in the operative positions illustrated in Figs. l-3.
  • the snap action device is mounted in a tumbler switch, said tumbler switch consisting of a mounting plate 1 made of insulating material, a contact 2, a housing cover 3, a second contact 4 and a switching member 5.
  • the switching member 5 is operatively connected to the novel snap action device.
  • the snap action device is made from a single blank and is in the form of a spring.
  • the snap action device or spring is positioned in the housing formed by the mounting plate 1 and the cover 3, said spring locally fixed at two points a, a to a base piece 6, the base piece 6 having the shape of a U (Figs. l-4) formed within a plane (as shown by the dotted lines of Fig. 7).
  • the spring may be fixed, for example, by welding with the U-shaped plane plate 6 having pro ections 8-8 on which washers 9, 9' are mounted.
  • the snap action device or spring consists of two longitudinal stiffened members 10 and 11 connected integrally by end members 12 and 13. End member 12 has an aperture 14 adapted to receive a contact 15.
  • the members 10 and 11 are stiffened by means of bendingover operations effected on the outwardly directed edges of said parts to form lips 10a and 11a.
  • Elastically deformable U-shaped sections 16 and 17 are formed near the right end of stiffening members 10 and 11 by merely bending said members in the shape of a U out of the plane of said stiffened members.
  • Figs. 8 to 10' the diagrammatic illustrations of the spring, have been in'cl-uded in: order to show the forces actingon the spring when in use.
  • a turning moment M1 acts in a; counterclockwise direction on the stiffened members 10 and 1 1:" which are connected at their left end by the end member 12 carrying: the Contact" 15, which turning moment produces a comparatively large. pressure between contacts 2- and 15.
  • a definite actuating pressurev Do acts on the stiffened member 18, said member 18! is swung in a clockwise direction. This in turn causes-the right end of member 18 to drop thu'sdecreasing the turn-- ing moment M-i.
  • Fig. 8 the diagrammatic illustrations of the spring
  • the snap action device or spring of this invention has many other desirable features. Since no knife edges are used as part of the device, the spring remains practically free of friction since no friction surfaces are present and only variations of internal strain appear at the bearing points. Changes in stress of the spring in consequence of wear of bearings are therefore out of question.
  • the flexure of compression members 20 and 21 is not critical, as according to Euler the power of reaction of a leaf spring subjected to buckling stress remains almost constant for small flexures within the elastic limit, in contradistinction to the conditions obtained with regard to helical springs. This olfers the advantage that the making and mounting of the spring is greatly facilitated as no narrow tolerances must be observed. For the same reasons, no adjusting members for the pressure of the spring are necessary. The electric current carrying capacity of the current carrying spring is comparatively great as no unsafe points in knife edge bearings need be taken into consideration.
  • the spring may be stamped from a single blank which makes its production very cheap. No support members for compression members 20 and 21 are required and it is obvious that it is relatively simple to mount the spring when in use.
  • a snap action device made from a single blank of metal comprising two symmetrically arranged spring members acting as compression springs, said members being disposed between two stiffened members, said stiffened members being stationary at one end and connected to each other at the other end by means of a contact carrying member, each of said stiffened members having an elastically deformable section, and a third stiffened member located, between said symmetrically arranged spring members and being stationary at the opposite end at which said above two stitfened members are stationary, said third stiffened member being free at its other end and serving as an actuating member.
  • a snap action device as defined in claim 1 in which the stationary ends of the three stiffened members are supported on the outer legs of a U-shaped plane base piece.
  • a snap action device as defined in claim 3 in which the stationary ends of the three stitfened members are welded to the legs of the plane base piece.
  • a snap action device made from a single blank of metal comprising a base piece, two stiffened members connected one to the other at one end by a connecting member fixedly mounted on said base piece and at the other end by a contact carrying member, each of said stiffened members having an elastically deformable bulge projecting from the plane of the stiffened member adjacent its mounted end, two symmetrically arranged spring members disposed between said stiffened members and acting as compression springs, said spring members connected at one of their ends to said contact carrying member and connected at their other end to a third stiffened member, said third stiffened member disposed between said spring members and fixedly mounted on said base piece at its end opposite it its end connected to said spring members, whereby said third stiffened member is an actuator.
  • a snap action device as defined in claim 5 characterized by the fact that the outer longitudinal edges of the first mentioned two stiffened members are bent over to increase the stiffening effect.
  • a snap action device as defined in claim 6 characterized by the fact that the third stiffened member is stamped with a longitudinally extending trough whereby the stiffening effect is increased.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)
  • Adjustable Resistors (AREA)
US249272A 1951-04-26 1951-10-02 Snap action device Expired - Lifetime US2697145A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH708326X 1951-04-26

Publications (1)

Publication Number Publication Date
US2697145A true US2697145A (en) 1954-12-14

Family

ID=4530550

Family Applications (1)

Application Number Title Priority Date Filing Date
US249272A Expired - Lifetime US2697145A (en) 1951-04-26 1951-10-02 Snap action device

Country Status (6)

Country Link
US (1) US2697145A (en(2012))
CH (1) CH289820A (en(2012))
DE (1) DE1024608B (en(2012))
FR (1) FR1053354A (en(2012))
GB (1) GB708326A (en(2012))
NL (1) NL73486C (en(2012))

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2861142A (en) * 1956-10-05 1958-11-18 American Radiator & Standard Snap switch-large air gap
US2899512A (en) * 1956-12-13 1959-08-11 burch
US2919319A (en) * 1957-12-23 1959-12-29 Controls Co Of America Snap switch blade mounting
US3038043A (en) * 1960-06-08 1962-06-05 Robertshaw Fulton Controls Co Snap acting switch
US3114016A (en) * 1960-05-26 1963-12-10 Bryant Electric Co Wiring device for controlling circuit continuity
US3178529A (en) * 1963-01-02 1965-04-13 Texas Instruments Inc Motion-translating device
US3213244A (en) * 1963-01-02 1965-10-19 Texas Instruments Inc Motion translating and amplifying devices
US3536315A (en) * 1968-08-14 1970-10-27 Speedring Corp Diaphragm spring
US4603242A (en) * 1984-04-27 1986-07-29 Omron Tateisi Electronics, Co. Electrical snap switch
US4717795A (en) * 1985-10-24 1988-01-05 Kontakta Alkatreszgyar Precision snap-action switch with stiffening ribs between an actuating bulge and support for the actuating spring element
US6412165B1 (en) * 1997-08-28 2002-07-02 Texas Instruments Incorporated Temperature responsive snap acting control assembly, device using such assembly and method for making
CN104343870A (zh) * 2014-05-25 2015-02-11 王楠 逆向弹簧及采用该逆向弹簧的助力装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE552518A (en(2012)) * 1955-11-19
AT204624B (de) 1958-04-25 1959-08-10 Richard Fonovits Kommanditgese Mikroschalter
DE3243528A1 (de) * 1982-11-25 1984-05-30 Thermostat-und Schaltgerätebau GmbH & Co KG, 8730 Bad Kissingen Kontaktfeder fuer schnappschalter

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2170748A (en) * 1935-12-04 1939-08-22 Micro Switch Corp Snap switch
US2246581A (en) * 1940-08-03 1941-06-24 Micro Switch Corp Electric switch
US2404874A (en) * 1944-08-11 1946-07-30 Maurice J Wohl Electric snap switch
US2476045A (en) * 1946-08-23 1949-07-12 First Ind Corp Compact snap acting device
US2508040A (en) * 1946-04-15 1950-05-16 First Ind Corp Snap acting mechanism
US2565790A (en) * 1948-09-27 1951-08-28 Mcgraw Electric Co Snap switch
USRE23412E (en) * 1945-06-26 1951-09-25 Snap-action electric switch
US2571453A (en) * 1948-05-10 1951-10-16 Cyril Kieft And Company Ltd Electric switch
US2589463A (en) * 1950-05-31 1952-03-18 Westinghouse Electric Corp Electrostatic precipitator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2363280A (en) * 1941-05-14 1944-11-21 Westinghouse Electric & Mfg Co Circuit controller
US2418068A (en) * 1943-10-28 1947-03-25 Richard T Cornelius Switch
US2413130A (en) * 1945-03-01 1946-12-24 William J Aitken Snap action switch
US2526850A (en) * 1947-01-20 1950-10-24 Cutler Hammer Inc Snap switch

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2170748A (en) * 1935-12-04 1939-08-22 Micro Switch Corp Snap switch
US2246581A (en) * 1940-08-03 1941-06-24 Micro Switch Corp Electric switch
US2404874A (en) * 1944-08-11 1946-07-30 Maurice J Wohl Electric snap switch
USRE23412E (en) * 1945-06-26 1951-09-25 Snap-action electric switch
US2508040A (en) * 1946-04-15 1950-05-16 First Ind Corp Snap acting mechanism
US2476045A (en) * 1946-08-23 1949-07-12 First Ind Corp Compact snap acting device
US2571453A (en) * 1948-05-10 1951-10-16 Cyril Kieft And Company Ltd Electric switch
US2565790A (en) * 1948-09-27 1951-08-28 Mcgraw Electric Co Snap switch
US2589463A (en) * 1950-05-31 1952-03-18 Westinghouse Electric Corp Electrostatic precipitator

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2861142A (en) * 1956-10-05 1958-11-18 American Radiator & Standard Snap switch-large air gap
US2899512A (en) * 1956-12-13 1959-08-11 burch
US2919319A (en) * 1957-12-23 1959-12-29 Controls Co Of America Snap switch blade mounting
US3114016A (en) * 1960-05-26 1963-12-10 Bryant Electric Co Wiring device for controlling circuit continuity
US3038043A (en) * 1960-06-08 1962-06-05 Robertshaw Fulton Controls Co Snap acting switch
US3178529A (en) * 1963-01-02 1965-04-13 Texas Instruments Inc Motion-translating device
US3213244A (en) * 1963-01-02 1965-10-19 Texas Instruments Inc Motion translating and amplifying devices
US3536315A (en) * 1968-08-14 1970-10-27 Speedring Corp Diaphragm spring
US4603242A (en) * 1984-04-27 1986-07-29 Omron Tateisi Electronics, Co. Electrical snap switch
US4717795A (en) * 1985-10-24 1988-01-05 Kontakta Alkatreszgyar Precision snap-action switch with stiffening ribs between an actuating bulge and support for the actuating spring element
US6412165B1 (en) * 1997-08-28 2002-07-02 Texas Instruments Incorporated Temperature responsive snap acting control assembly, device using such assembly and method for making
CN104343870A (zh) * 2014-05-25 2015-02-11 王楠 逆向弹簧及采用该逆向弹簧的助力装置

Also Published As

Publication number Publication date
GB708326A (en) 1954-05-05
CH289820A (de) 1953-03-31
NL73486C (en(2012))
FR1053354A (fr) 1954-02-02
DE1024608B (de) 1958-02-20

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