US3056866A - Switch apparatus - Google Patents

Switch apparatus Download PDF

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Publication number
US3056866A
US3056866A US853286A US85328659A US3056866A US 3056866 A US3056866 A US 3056866A US 853286 A US853286 A US 853286A US 85328659 A US85328659 A US 85328659A US 3056866 A US3056866 A US 3056866A
Authority
US
United States
Prior art keywords
snap acting
spring leaf
switch
snap
tension
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
US853286A
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English (en)
Inventor
Edward H Karleen
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.)
Honeywell Inc
Original Assignee
Honeywell Inc
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 Honeywell Inc filed Critical Honeywell Inc
Priority to US853286A priority Critical patent/US3056866A/en
Priority to GB39065/60D priority patent/GB972987A/en
Priority to NL257953A priority patent/NL257953A/xx
Priority to DEM47117A priority patent/DE1187706B/de
Priority to BE597117A priority patent/BE597117A/fr
Priority to FR844112A priority patent/FR1273748A/fr
Priority to CH1282460A priority patent/CH367547A/fr
Application granted granted Critical
Publication of US3056866A publication Critical patent/US3056866A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • 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
    • H01H13/40—Blade spring with at least one snap-acting leg and at least one separate contact-carrying or contact-actuating leg
    • H01H13/42—Blade spring with at least one snap-acting leg and at least one separate contact-carrying or contact-actuating leg having three legs

Definitions

  • SWITCH APPARATUS Filed Nov. 16, 1959 INVENTOR. EDWARD H. KARLEEN ATTORNEY United States Patent Ofiice 3,056,866 Patented Oct. 2, 1962 3,056,866 SWITCH APPARATUS Edward H. Karleen, Freeport, Ill., assignor to Minneapolis-Honeywell Regulator Company, Minneapolis, Minn., a corporation of Delaware Filed Nov. 16, 1959, Ser. No. 853,286 5 Claims. (Cl. 200-67)
  • the present invention is directed to an improved precision snap acting switch, of the general type disclosed in the P. K. McGaJl Patent 1,960,020, wherein the movement of the operating means of the switch which is required between the actuated and de-actuated condition of the switch is greatly reduced as compared to prior art precision snap acting switches of comparable basic construction.
  • the differential movement of a precision snap acting switch can be reduced by reducing the air gap between the normally open contact and the movable contact of the switch.
  • the normal air gap between the movable contact when in engagement with the normally closed contact and the normally open contact is about 0.006" to 0.010 so that a reduction of the air gap can bring about a heel and toe condition during the actuation of the switch in that a portion of the movable contact can be engaging the normally closed contact while another portion of the movable contact can be engaging the normally open contact. This of course can not be tolerated.
  • differential movement is reduced to a very great extent when compared to a similar switch without the invention.
  • differential is reduced by incorporating a portion effectively a spring leaf of two thickness in the snap acting system; or stated another way, by providing resilient means in association with a part of a resilient member of the snap acting system.
  • this takes the form of a spring leaf member disposed in overlying relationship with a spring leaf member of the snap acting system.
  • the overlying spring leaf member is positioned between the support for the spring leaf member of the snap acting system it overlies and the actuating area of the snap acting system.
  • Another object of the present invention is to provide a precision snap acting switch with greatly reduced differential without encountering the heel and toe condition or a dead break condition.
  • a further object of the present invention is to provide a precision snap acting switch with greatly reduced differential by utilization of resilient means in conjunction with a resilient member of the snap acting system.
  • Still another object of the present invention is to provide a precision snap acting switch with greatly reduced differential wherein a portion of the snap acting system is effectively a spring leaf of two thicknesses.
  • FIGURE 1 is a cross sectional 'view of precision snap acting switch incorporating the invention.
  • FIGURE 2 is an exploded view of the structure of FIGURE 1.
  • a precision snap acting switch (of the proportions disclosed in the H. Millard Patent 2,600,564 and of the form disclosed in the H. Millard Patent 2,627,754) includes a housing 10 comprised of a molded plastic base 11 and a molded plastic cover 12 appropriately fastened together.
  • a first terminal insert 15 - is molded in the base 11 and includes a contact supporting member 16 having a first fixed contact 17 supported therefrom.
  • a second terminal insert 20 is also molded into the base 11 and includes a contact support member 21 having a second fixed contact 23 supported therefrom.
  • a third terminal insert 25 is likewise molded into the base 11 and includes a support member 26 disposed on the upper extremity 25a thereof.
  • a leaf spring 30 which includes a compression member 31 and a pair of tension members 32.
  • the tension members 32 of the spring leaf 30 are supported in cantilever fashion from the upper extremity 25a of the terminal insert 25 and the compression member 31 of the spring leaf 30 is supported in cantilever fashion from the upstanding leg 26a of the support member 26 with the free and movable extremity 33 containing a contact 34 disposed between the fixed contacts 17 and 23 with the movable contact 34 in engagement with the fixed contact 17 so as to form a snap acting system.
  • the spring leaf 30 Overlying a portion of the spring leaf 30 is another spring leaf 40 which for convenience is disposed on the upper extremity 25a of the terminal insert 25 and which is approximately the same thickness as the spring leaf 30 and of the same general outline as the portion of the spring leaf 30 that it overlies.
  • the upper extremity 25a of the terminal insert 25 is upset so as to maintain the support member 26, the spring leaf 30 and the spring leaf 40 in position.
  • a plunger 45 includes an upset metallic pin 46 which is disposed in an opening 47 of the cover 12. lviolded about the lower extremity of the pin 46 is a plastic shoe 48, a portion of which engages the spring leaf 40.
  • spring leaf 40 has been shown to be flat, camber can be given the spring leaf 40 at its free end either in an upward or downward direction with the same results being obtained, insofar as reduction of differential is concerned.
  • a snap switch arrangement comprising: a housing including an inherently monostable base and a cover; a snap acting system including a pair of spring leaf tension members with a compression member disposed therebetween, first extremities of said tension and compression members supported in cantilever fashion from said base and the second extremities of said tension and compression members interconnected and arranged to be moved with a snap action between a first stop portion and a second stop portion provided on said base; a single relatively flat spring leaf member supported in cantilever fashion on said base and at the same location as said tension members, said spring leaf member overlying and engaging a portion of said tension members and extending into the actuating area of said snap acting system; and an actuating member for said snap acting system positioned in said cover and arranged to engage said spring leaf member so as to cause actuation and to allow de-actuation of said snap acting system upon movement of said actuating member in opposite directions; said spring leaf member combining with said snap acting system to reduce the differential movement required between the actuating and de-actuating points of said snap acting system.
  • a snap switch arrangement comprising: a support member; an inherently monostable snap acting system 1ncluding a spring leaf tension member and a compress on member, first extremitie of said tension and compression members supported in cantilever fashion from said support member and the second extremities of said tension and compression members interconnected and arranged to be moved with a snap action between a first stop portion and a second stop portion provided on said support member; a single relatively flat spring leaf member supported in cantilever fashion on said support member and at the same location as said tension member, said sprlng leaf member overlying and engaging a portion of said tension member and extending into the actuating area of said snap acting system; and operating means for said snap acting acting system arranged to engage said spring leaf member so as to cause actuation and to allow deactuation of said snap acting system upon movement of said operating means in opposite directions; said spring leaf member combining with said snap acting system to reduce the diiferential movement required between the actuating and de-actuating points of said snap acting systern.
  • a snap switch arrangement comprising: a support member; an inherently monstable snap acting system including a spring leaf tension member and a compression member, first extremities of said tension and compression members supported in cantilever fashion from said support member and the second extremities of said tension and compression members interconnected and arranged to be moved with a snap action between a first stop portion and a second stop portion provided on said support member; a single relatively flat spring leaf member contiguous with a portion of said tension member; and operating means for said snap acting system arranged to cause actuation 0nd to allow tie-actuation of said snap acting system upon movement of said operating means in opposite directions; said spring leaf member being positioned between the support area of said tension member and the actuating area of said snap acting system; said spring leaf member combining with said snap acting system to reduce the differential movement required between the actuating and de-actuating points of said snap acting system,
  • a snap switch arrangement comprising: a support member; an inherently monostable snap acting system including a spring leaf tension member and a compression member, first extremities of said tension and compression members supported in cantilever fashion from said support member and the second extremities of said tension and compression members interconnected and arranged to be moved with a snap action between a first stop portion and a second stop portion; a single relatively fiat resilient member contiguous with a portion of said tension member; and operating means for said snap acting system arranged to act upon said resilient member to cause actuation and to allow dc-actuation of said snap acting system upon movement of said operating means in opposite directions; said resilient member being positioned between the support area of said tension member and the actuating area of said snap acting system; said resilient member combining with said snap acting system to reduce the differential movement required between the actuating and de-actuating points of said snap acting system.
  • a snap switch arrangement comprising: a support member; an inherently monostable snap acting system including a tension member and a compression member, one of said members being resilient, first extremities of said tension and compression members supported in cantilever fashion from said support member and the second extremities of said tension and compression members interconnected and arranged to be moved with a snap action between a first stop portion and a second stop portion; a single relatively fiat resilient member contiguous with a portion of one of said tension and compression members;

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  • Push-Button Switches (AREA)
US853286A 1959-11-16 1959-11-16 Switch apparatus Expired - Lifetime US3056866A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US853286A US3056866A (en) 1959-11-16 1959-11-16 Switch apparatus
GB39065/60D GB972987A (en) 1959-11-16 1960-11-14 Improvements in snap-acting electric switches
NL257953A NL257953A (en, 2012) 1959-11-16 1960-11-15
DEM47117A DE1187706B (de) 1959-11-16 1960-11-15 Elektrischer Schnappschalter
BE597117A BE597117A (fr) 1959-11-16 1960-11-16 Perfectionnements aux commutateurs électriques à rupture brusque.
FR844112A FR1273748A (fr) 1959-11-16 1960-11-16 Perfectionnements aux commutateurs électriques à rupture brusque
CH1282460A CH367547A (fr) 1959-11-16 1960-11-16 Commutateur électrique à rupture brusque

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US853286A US3056866A (en) 1959-11-16 1959-11-16 Switch apparatus

Publications (1)

Publication Number Publication Date
US3056866A true US3056866A (en) 1962-10-02

Family

ID=25315611

Family Applications (1)

Application Number Title Priority Date Filing Date
US853286A Expired - Lifetime US3056866A (en) 1959-11-16 1959-11-16 Switch apparatus

Country Status (7)

Country Link
US (1) US3056866A (en, 2012)
BE (1) BE597117A (en, 2012)
CH (1) CH367547A (en, 2012)
DE (1) DE1187706B (en, 2012)
FR (1) FR1273748A (en, 2012)
GB (1) GB972987A (en, 2012)
NL (1) NL257953A (en, 2012)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3172970A (en) * 1962-06-27 1965-03-09 Fansteel Metallurgical Corp Snap-action electrical switch with slotted normally unstressed movable contact blade
US3283109A (en) * 1964-11-30 1966-11-01 Itt Snap-action leaf spring switch
US4652706A (en) * 1986-01-29 1987-03-24 Tower Manufacturing Corporation Double pole switch construction
US4764649A (en) * 1985-12-13 1988-08-16 Matsushita Electric Works, Ltd. Snap switch with a separate leaf spring biasing member
US6255611B1 (en) 2000-02-17 2001-07-03 Shin Jiuh Corp. Pushbutton switch
US20060131155A1 (en) * 2004-12-15 2006-06-22 Hopkins John D Quiet snap action switch
US20100230269A1 (en) * 2007-01-10 2010-09-16 Wildman Craig R Pressure differential switch
CH708894A1 (de) * 2013-11-26 2015-05-29 Werner Zumbrunn Sprungschalter mit konstanter Kontaktkraft.

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2807943A1 (de) * 1978-02-24 1979-08-30 Ranco Inc Elektrischer schalter fuer regelgeraete, insbesondere fuer temperaturregler
DE9305074U1 (de) * 1993-04-02 1993-06-09 Schaltbau AG, 8000 München Mikroschalter
CN109119272A (zh) * 2018-09-25 2019-01-01 深圳马太亚科技有限公司 静音微动开关及鼠标

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1960020A (en) * 1933-03-29 1934-05-22 Burgess Lab Inc C F Snap switch
US2468512A (en) * 1945-08-30 1949-04-26 First Ind Corp Switch mechanism
GB655549A (en) * 1947-06-30 1951-07-25 John Lionel Rawlings Improvements in and relating to snap-action electric switches
US2627754A (en) * 1949-10-15 1953-02-10 Honeywell Regulator Co Overcenter snap device
US2701475A (en) * 1950-04-17 1955-02-08 Honeywell Regulator Co Snap acting device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB505549A (en) * 1937-11-26 1939-05-12 Burgess Products Co Ltd Improvements in snap-action electric switches
US2351181A (en) * 1942-12-21 1944-06-13 Micro Switch Corp Electric switch construction
US2743331A (en) * 1955-01-21 1956-04-24 W L Maxson Corp Snap switch
DE1795769U (de) * 1956-12-13 1959-09-17 Siemens Ag Endschalter mit sehr kleiner betaetigungsauslenkung.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1960020A (en) * 1933-03-29 1934-05-22 Burgess Lab Inc C F Snap switch
US2468512A (en) * 1945-08-30 1949-04-26 First Ind Corp Switch mechanism
GB655549A (en) * 1947-06-30 1951-07-25 John Lionel Rawlings Improvements in and relating to snap-action electric switches
US2627754A (en) * 1949-10-15 1953-02-10 Honeywell Regulator Co Overcenter snap device
US2701475A (en) * 1950-04-17 1955-02-08 Honeywell Regulator Co Snap acting device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3172970A (en) * 1962-06-27 1965-03-09 Fansteel Metallurgical Corp Snap-action electrical switch with slotted normally unstressed movable contact blade
US3283109A (en) * 1964-11-30 1966-11-01 Itt Snap-action leaf spring switch
US4764649A (en) * 1985-12-13 1988-08-16 Matsushita Electric Works, Ltd. Snap switch with a separate leaf spring biasing member
US4652706A (en) * 1986-01-29 1987-03-24 Tower Manufacturing Corporation Double pole switch construction
US6255611B1 (en) 2000-02-17 2001-07-03 Shin Jiuh Corp. Pushbutton switch
US20060131155A1 (en) * 2004-12-15 2006-06-22 Hopkins John D Quiet snap action switch
US7081593B2 (en) 2004-12-15 2006-07-25 John David Hopkins Quiet snap action switch
US20100230269A1 (en) * 2007-01-10 2010-09-16 Wildman Craig R Pressure differential switch
US8362375B2 (en) 2007-01-10 2013-01-29 Unicontrol, Inc. Pressure differential switch
CH708894A1 (de) * 2013-11-26 2015-05-29 Werner Zumbrunn Sprungschalter mit konstanter Kontaktkraft.

Also Published As

Publication number Publication date
BE597117A (fr) 1961-05-16
GB972987A (en) 1964-10-21
NL257953A (en, 2012) 1964-04-10
DE1187706B (de) 1965-02-25
CH367547A (fr) 1963-02-28
FR1273748A (fr) 1961-10-13

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