US3619530A - Doorjamb switch - Google Patents

Doorjamb switch Download PDF

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Publication number
US3619530A
US3619530A US33310A US3619530DA US3619530A US 3619530 A US3619530 A US 3619530A US 33310 A US33310 A US 33310A US 3619530D A US3619530D A US 3619530DA US 3619530 A US3619530 A US 3619530A
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Prior art keywords
contact
housing
concavity
switch
flexible portion
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US33310A
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Patsy De Vincent
Sidney G Dunford
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Motors Liquidation Co
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Motors Liquidation Co
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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
    • H01H13/04—Cases; Covers
    • H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings
    • 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
    • H01H13/48—Snap-action arrangements depending upon deformation of elastic members using buckling of disc springs

Definitions

  • a doorjamb switch includes an annular housing comprised of an annular support portion and an annular flexible portion. Interlocking flanges on the portions cooperate to secure the portions to each other and assemble the housing.
  • the support portion includes an annular contact receptacle which receives a generally planar first contact and a disklike second contact separated by an insulating washer.
  • an annular mounting surface of the flexible portion engages the periphery of the first contact and seats the periphery of the second contact of an annular mounting surface of the support portion.
  • the first contact is fixed with respect to the support portion and the periphery of the second contact is slidable between the insulating washer and the surface of the support portion.
  • the second contact is concave and has a central projection received within central apertures of the insulating washer and the first contact. The concavity of the second contact biases the central projection into engagement with the first contact to close the switch.
  • a central portion of the flexible portion is engageable by a door during closing movement to flex the central portion and cause it to abut the central projection of the second contact. This increases the concavity of the second contact and moves it out of engagement with the first contact to open the switch. The periphery of the second contact slides between the washer and the surface of the support portion when the concavity of the second contact is increased.
  • An outer protective flange on the flexible portion prevents excessive flexing of the flexible portion and possible damage to the contacts.
  • a housing includes a flexible portion that acts on peripheral portions of a concave disklike contact to decrease the concavity thereof and move the disklike contact out of engagement with a fixed contact.
  • Vehicles conventionally include doorjamb switches for controlling interior lights and other accessories. These switches are normally closed when the vehicle doors are open and are open when the vehicle doors are closed. Thus, the switches allow lighting and operation of other accessories when passengers are entering or leaving the vehicles.
  • This invention provides such a switch in which the opening and closing of the switch is accomplished by varying the concavity of a concave disklike contact to move the contact into and out of engagement with a stationary contact.
  • An object of this invention is to provide a doorjamb switch having a fixed first contact and a concave disklike second contact normally engageable with the first contact and movable out of engagement therewith upon variance of the concavity of the second contact.
  • a concave disklike contact has a central projection which normally engages the edge of an aperture in a stationary contact to close the switch.
  • a flexible portion of the switch housing abuts the central projection to increase the concavity of the disklike contact and thus move the central projection out of engagement with the stationary contact to thereby open the switch.
  • Another embodiment includes a concave disklike contact that has opposed peripheral portions mounted within a flexible portion of the switch housing.
  • the flexible portion acts on the peripheral portions of the disklike contact to decrease the concavity thereof and move the disklike contact out of engagement with a stationary contact to thereby open the switch.
  • FIG. I is a side sectional view of an embodiment of a switch according to the invention with the switch closed;
  • FIG. 2 is an elevated end view of the switch partially broken away
  • FIG. 3 is a sectional view taken along line 33 of FIG. 2;
  • FIG. 4 is a view similar to FIG. 1 but showing the switch open;
  • FIG. 5 is a disassembled perspective view partially cut away
  • FIG. 6 is a side sectional of another embodiment with the switch closed
  • FIG. 7 is a sectional end view of the switch shown in FIG. 6;
  • FIG. 8 is a view similar to FIG. 6 but showing the switch
  • FIG. 9 is a disassembled perspective view of the switch.
  • FIG. 10 is a partially broken away view of an adjustable embodiment. 7
  • a doorjamb switch 12 includes an annular housing 14 having an annular support portion 16 and an annular flexible portion 18.
  • the flexible portion 18 includes an annular support receptacle 20 and the support portion 16 includes an annular flange 22 at one end thereof.
  • the flexible portion 18 is deformed and receives the annular flange 22 within the support receptacle 20.
  • Annular interlocking flanges 24 and 26 on the support portion 16 and the flexible portion 18 respectively cooperate to secure the portions 16 and 18 to each other.
  • Switch 12 is mounted on a vehicle body by axially inserting the support portion 16 through an aperture 28 in a doorjamb 30 to locate annular mounting flanges 32 and 34 of portions 18 and 16 respectively on opposite sides of the door jamb 30.
  • the mounting flanges 32 and 34 resiliently engage the doorjamb 30 to mount the switch 12 thereon.
  • the support portion 16 includes a contact receptacle 36 defined by the annular flange 22, a generally dishlike surface 38, and a generally annular mounting surface 40. Adjacent the contact receptacle 36, first and second circumferentially opposed grooves 42 and 44 in support portion 16 communicate with an axial bore 46. First and second disklike contacts 48 and 50 are received within the contact receptacle 36. A terminal leg 52 of contact 50 is received within the second groove 44, and a wire 54 secured to leg 52 extends outwardly of the switch 12 through the bore 46. A stamped central pro- 5 jection 56 of contact 50 projects within a central aperture 58 in a peripherally flanged insulating washer 60 which receives the contact 48 and separates contact 48 from the contact 50.
  • a central aperture 62 of contact 48 is engaged by the central projection 56 of contact 50 to electrically connect contacts 48 and 50.
  • Washer 60 and contact 50 have circumferential apertures 64 and 66 that accommodate a wire 68 attached at 70 to the contact 48.
  • the wire 68 is received within the first groove 42 and extends outwardly of the switch 12 through bore 46.
  • Wires 54 and 68 are conventionally connected across a source of power.
  • An annular mounting surface 72 of the flexible portion 18 engages the periphery of contact 48 to seat the periphery of contact 50 on the mounting surface 40.
  • the mounting surfaces 40 and 72 thus cooperate to mount the contacts 48 and 50 in the housing 14, with the periphery of contact 50 being slidable relative to surface 40 and the periphery of washer 60, and with the contact 48 being fixed with respect to support portion 16.
  • Normally contact 50 is less concave than as shown but the engagement of the central projection 56 of contact 50 with the edge of the aperture 62 of contact 48 causes the concavity of contact 50 to be slightly increased.
  • the apex of the outer conically actuating surface 74 of the flexible portion 18 is engaged by a door portion 76 during closing of the door.
  • This causes the central projection of the flexible portion 18 to flex and move a central actuating portion 78 into engagement with the central projection 56 of contact 50.
  • the central projection 56 is thus moved axially of the housing 14 out of engagement with the contact 48 to open the switch.
  • the movement of the central projection 56 causes the concavity of the contact 50 to increase and the edge portion of contact 50 to slide with respect to surface 40 during the increase of the concavity of contact 50.
  • an outer protective flange 80 prevents excessive flexing of the central portion of the flexible portion 18 and possible damage to the contacts 48 and 50.
  • a doorjamb switch generally indicated at 82 includes a housing 84 having a support portion 86 and a flexible portion 88.
  • the support portion 86 includes a fixed first contact 90 connected to a wire 92 that extends through an axial bore 93 in support portion 86.
  • the flexible portion 88 includes diametrically opposed grooves 94 that receive opposed peripheral portions 96 of a concave disklike second contact 98.
  • Diametrically opposed mounting nubs 100 of flexible portion 88 cooperate with grooves 94 and a diametrical rectangular nub 102 to mount the contact 98 within the flexible portion 88.
  • a stamped U- shaped leg 104 of contact 98 connects a wire 106 to contact 98.
  • the wire 106 is received within a groove 107 that communicates with bore 93.
  • annular flange 108 Upon assembly of the housing 84, an annular flange 108 is deformed such that the flexible portion 88 accepts an annular flange 110 of the support portion 86. After assembly, the annular flange 110 of support portion 86 cooperates with flange 108 to secure the portions 86 and 88 to each other with the contacts 90 and 98 in engagement with each other. The flange 110 also cooperates with nubs I00 to maintain the flexible portion 88 in a concentric relationship with the support portion 86.
  • the support portion 86 is axially inserted within an aperture 112 in a doorjamb 114.
  • a force applied to the support portion 86 causes an annular flange 113 on the support portion 86 to snap over the edge of the jamb 114 that defines the aperture 112.
  • the flanges 108 and 113 then cooperate to mount the switch 82 on the jamb 114.
  • a door portion 116 engages the outer periphery of the flexible portion 88. This causes the nubs 100 and the flexible portion 88 adjacent grooves 94 to cooperate and apply couples to the peripheral portions 96 of contact 98. These couples decrease the concavity of contact 98 and move the contact 98 out of engagement with contact 90 to the position shown in FIG 8. The peripheral portions 96 slide within the grooves 94 during the decrease in the concavity of contact 98.
  • an adjustable embodiment includes a switch 120 received within a mounting cup 122 and adjustably positioned therein by circumferential nubs 124.
  • the invention thus provides doorjamb switches wherein the opening and closing of the switches is accomplished by varying the concavity of disklike contacts to open and close the switches.
  • a normally closed switch comprising: a housing including a support portion and a flexible portion; a first contact mounted within the housing and fixed with respect to the support portion; a concave disklike second contact having a portion of the periphery thereof slidably mounted within the housing, the second contact being integrally biased by the concavity thereof to position a central portion thereof in engagement with the first contact thus closing the switch; and means on the flexible portion acting on the second contact during flexing of the flexible portion to vary the concavity thereof and move the second contact out of central portion of engagement with the first contact to open the switch, the portion of the periphery of the second contact sliding within the housing during the variation of the concavity of the second contact.
  • a normally closed switch comprising: a generally annular housing including a generally annular support portion and a generally annular flexible portion, the portions being secured to each other in a concentric relationship; an annular first contact concentrically mounted within the housing and fixed with respect to the support portion; a concave disklike second contact having a portion of the periphery thereof slidable mounted within the housing to concentrically position the second contact within the housing, the second contact being integrally biased by the concavity thereof to position a central portion thereof in engagement with the first contact thus closing the switch; and means on the flexible portion acting on the second contact during flexing of the flexible portion to vary the concavity thereof and move the central portion of the second contact out of engagement with the first contact thus opening the switch, the portion of the periphery of the second contact sliding within the housing during the variation of the concavity of the second contact.
  • a normally closed switch comprising: an annular housing including an annular support portion and an annular flexible portion, the portions being secured to each other in a concentric relationship; an annular first contact mounted within the housing and fixed with respect to the support portion in a relationship concentric therewith, the first contact having a central aperture therein; a concave disklike second contact having a portion of the periphery thereof slidably mounted within the housing to concentrically position the second contact within the housing, the second contact having a central projection received within the aperture of the first contact and integrally biased by the concavity of the second contact into engagement with the first contact; and a central actuating portion on the flexible portion abutting the central projection of the second contact during flexing of the flexible portion to increase the concavity thereof and move .the second contact out of engagement with the first contact to open the switch, the portion of the periphery of the second contact sliding within the housing during the increase of the concavity of the second contact.
  • a normally closed switch comprising: a generally annular housing including a generally annular support portion and a generally annular flexible portion, the portions bein secured to each other in a concentric relatlonship; an annular lrst contact mounted on the support portion in a relationship concentric therewith; and a concave disklike second contact having a portion of the periphery thereof slidable mounted within the flexible portion to concentrically position the second contact within the housing, the second contact being integrally biased by the concavity thereof into engagement with the first contact to close the switch, the flexible portion engaging the portion of the periphery of the second contact during flexing of the flexible portion to decrease the concavity thereof and move the second contact out of engagement with the first contact to open the switch, the portion of the periphery of the second contact sliding within the flexible portion during the decrease of the concavity of the second contact.

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Abstract

A doorjamb switch includes an annular housing comprised of an annular support portion and an annular flexible portion. Interlocking flanges on the portions cooperate to secure the portions to each other and assemble the housing. In one embodiment, the support portion includes an annular contact receptacle which receives a generally planar first contact and a disklike second contact separated by an insulating washer. Upon assembly of the housing, an annular mounting surface of the flexible portion engages the periphery of the first contact and seats the periphery of the second contact of an annular mounting surface of the support portion. The first contact is fixed with respect to the support portion and the periphery of the second contact is slidable between the insulating washer and the surface of the support portion. As mounted, the second contact is concave and has a central projection received within central apertures of the insulating washer and the first contact. The concavity of the second contact biases the central projection into engagement with the first contact to close the switch. A central portion of the flexible portion is engageable by a door during closing movement to flex the central portion and cause it to abut the central projection of the second contact. This increases the concavity of the second contact and moves it out of engagement with the first contact to open the switch. The periphery of the second contact slides between the washer and the surface of the support portion when the concavity of the second contact is increased. An outer protective flange on the flexible portion prevents excessive flexing of the flexible portion and possible damage to the contacts. In another embodiment, a housing includes a flexible portion that acts on peripheral portions of a concave disklike contact to decrease the concavity thereof and move the disklike contact out of engagement with a fixed contact.

Description

United States Patent [72] Inventors Patsy De Vincent;
Sidney G. Dunford, both of Dayton, Ohio [21] Appl. No. 33,310 [22] Filed Apr. 30, 1970 [45] Patented Nov. 9, 1971 [7 3] Assignee General Motors Corporation Detroit, Mich.
154 DOORJAMB swircn 4 Claims, 10 Drawing Figs.
[52] US. Cl 200/159 B, 200/67 DB [51] Int. Cl ..H0lh 13/48, H01h 13/06, H01h l3/52 [50] Field of Search 200/159 R, 159 A, 159 B, 67 DA, 67 DB, 86 R, 61.78, 61.81
[56] References Cited UNITED STATES PATENTS 2,409,483 10/1946 Gandelot 2001159 B FOREIGN PATENTS 1,030,050 6/ 1953 France 200/159 R 1,352,256 l/ 1964 France 200/67 DB 1,056,410 l/1967 Great Britain 200/159 B Primary ExaminerH. 0. Jones Assistant Examiner-Robert A. Vanderhye Attorneys-W. E. Finken and Herbert Furman ABSTRACT: A doorjamb switch includes an annular housing comprised of an annular support portion and an annular flexible portion. Interlocking flanges on the portions cooperate to secure the portions to each other and assemble the housing. In one embodiment, the support portion includes an annular contact receptacle which receives a generally planar first contact and a disklike second contact separated by an insulating washer. Upon assembly of the housing, an annular mounting surface of the flexible portion engages the periphery of the first contact and seats the periphery of the second contact of an annular mounting surface of the support portion. The first contact is fixed with respect to the support portion and the periphery of the second contact is slidable between the insulating washer and the surface of the support portion. As mounted, the second contact is concave and has a central projection received within central apertures of the insulating washer and the first contact. The concavity of the second contact biases the central projection into engagement with the first contact to close the switch. A central portion of the flexible portion is engageable by a door during closing movement to flex the central portion and cause it to abut the central projection of the second contact. This increases the concavity of the second contact and moves it out of engagement with the first contact to open the switch. The periphery of the second contact slides between the washer and the surface of the support portion when the concavity of the second contact is increased. An outer protective flange on the flexible portion prevents excessive flexing of the flexible portion and possible damage to the contacts. In another embodiment, a housing includes a flexible portion that acts on peripheral portions of a concave disklike contact to decrease the concavity thereof and move the disklike contact out of engagement with a fixed contact.
PAIENTEDuuv 9 l9?! 3.619.530
sum 1 or 2 I BY Szdzzey G'flan/bra' NW W AT TORNE Y PATENTEDNBV 9 I911 SHEET 2 BF 2 [NS/away & flanfbra' A MM MM ATTORNEY DOORJAMB swn'cu This invention relates to doorjamb switches.
Vehicles conventionally include doorjamb switches for controlling interior lights and other accessories. These switches are normally closed when the vehicle doors are open and are open when the vehicle doors are closed. Thus, the switches allow lighting and operation of other accessories when passengers are entering or leaving the vehicles.
This invention provides such a switch in which the opening and closing of the switch is accomplished by varying the concavity of a concave disklike contact to move the contact into and out of engagement with a stationary contact.
An object of this invention is to provide a doorjamb switch having a fixed first contact and a concave disklike second contact normally engageable with the first contact and movable out of engagement therewith upon variance of the concavity of the second contact.
In carrying out this object, use is made of two different switch embodiments.
In one preferred embodiment, a concave disklike contact has a central projection which normally engages the edge of an aperture in a stationary contact to close the switch. A flexible portion of the switch housing abuts the central projection to increase the concavity of the disklike contact and thus move the central projection out of engagement with the stationary contact to thereby open the switch.
Another embodiment includes a concave disklike contact that has opposed peripheral portions mounted within a flexible portion of the switch housing. The flexible portion acts on the peripheral portions of the disklike contact to decrease the concavity thereof and move the disklike contact out of engagement with a stationary contact to thereby open the switch.
In the drawings:
FIG. I is a side sectional view of an embodiment of a switch according to the invention with the switch closed;
FIG. 2 is an elevated end view of the switch partially broken away;
FIG. 3 is a sectional view taken along line 33 of FIG. 2;
FIG. 4 is a view similar to FIG. 1 but showing the switch open;
FIG. 5 is a disassembled perspective view partially cut away;
FIG. 6 is a side sectional of another embodiment with the switch closed;
FIG. 7 is a sectional end view of the switch shown in FIG. 6;
FIG. 8 is a view similar to FIG. 6 but showing the switch FIG. 9 is a disassembled perspective view of the switch; and
FIG. 10 is a partially broken away view of an adjustable embodiment. 7
Referring to FIGS. 1 through 5, a doorjamb switch 12 includes an annular housing 14 having an annular support portion 16 and an annular flexible portion 18. The flexible portion 18 includes an annular support receptacle 20 and the support portion 16 includes an annular flange 22 at one end thereof. Upon assembly of the housing 14, the flexible portion 18 is deformed and receives the annular flange 22 within the support receptacle 20. Annular interlocking flanges 24 and 26 on the support portion 16 and the flexible portion 18 respectively cooperate to secure the portions 16 and 18 to each other.
Switch 12 is mounted on a vehicle body by axially inserting the support portion 16 through an aperture 28 in a doorjamb 30 to locate annular mounting flanges 32 and 34 of portions 18 and 16 respectively on opposite sides of the door jamb 30. The mounting flanges 32 and 34 resiliently engage the doorjamb 30 to mount the switch 12 thereon.
The support portion 16 includes a contact receptacle 36 defined by the annular flange 22, a generally dishlike surface 38, and a generally annular mounting surface 40. Adjacent the contact receptacle 36, first and second circumferentially opposed grooves 42 and 44 in support portion 16 communicate with an axial bore 46. First and second disklike contacts 48 and 50 are received within the contact receptacle 36. A terminal leg 52 of contact 50 is received within the second groove 44, and a wire 54 secured to leg 52 extends outwardly of the switch 12 through the bore 46. A stamped central pro- 5 jection 56 of contact 50 projects within a central aperture 58 in a peripherally flanged insulating washer 60 which receives the contact 48 and separates contact 48 from the contact 50. The edge of a central aperture 62 of contact 48 is engaged by the central projection 56 of contact 50 to electrically connect contacts 48 and 50. Washer 60 and contact 50 have circumferential apertures 64 and 66 that accommodate a wire 68 attached at 70 to the contact 48. The wire 68 is received within the first groove 42 and extends outwardly of the switch 12 through bore 46. Wires 54 and 68 are conventionally connected across a source of power.
An annular mounting surface 72 of the flexible portion 18 engages the periphery of contact 48 to seat the periphery of contact 50 on the mounting surface 40. The mounting surfaces 40 and 72 thus cooperate to mount the contacts 48 and 50 in the housing 14, with the periphery of contact 50 being slidable relative to surface 40 and the periphery of washer 60, and with the contact 48 being fixed with respect to support portion 16. Normally contact 50 is less concave than as shown but the engagement of the central projection 56 of contact 50 with the edge of the aperture 62 of contact 48 causes the concavity of contact 50 to be slightly increased.
Referring to FIG. 4, after the assembled switch 12 is mounted on the doorjamb 30, the apex of the outer conically actuating surface 74 of the flexible portion 18 is engaged by a door portion 76 during closing of the door. This causes the central projection of the flexible portion 18 to flex and move a central actuating portion 78 into engagement with the central projection 56 of contact 50. The central projection 56 is thus moved axially of the housing 14 out of engagement with the contact 48 to open the switch. The movement of the central projection 56 causes the concavity of the contact 50 to increase and the edge portion of contact 50 to slide with respect to surface 40 during the increase of the concavity of contact 50.
It will be noted that an outer protective flange 80 prevents excessive flexing of the central portion of the flexible portion 18 and possible damage to the contacts 48 and 50.
Referring to FIGS. 6 through 9, a doorjamb switch generally indicated at 82 includes a housing 84 having a support portion 86 and a flexible portion 88.
The support portion 86 includes a fixed first contact 90 connected to a wire 92 that extends through an axial bore 93 in support portion 86.
The flexible portion 88 includes diametrically opposed grooves 94 that receive opposed peripheral portions 96 of a concave disklike second contact 98. Diametrically opposed mounting nubs 100 of flexible portion 88 cooperate with grooves 94 and a diametrical rectangular nub 102 to mount the contact 98 within the flexible portion 88. A stamped U- shaped leg 104 of contact 98 connects a wire 106 to contact 98. The wire 106 is received within a groove 107 that communicates with bore 93.
Upon assembly of the housing 84, an annular flange 108 is deformed such that the flexible portion 88 accepts an annular flange 110 of the support portion 86. After assembly, the annular flange 110 of support portion 86 cooperates with flange 108 to secure the portions 86 and 88 to each other with the contacts 90 and 98 in engagement with each other. The flange 110 also cooperates with nubs I00 to maintain the flexible portion 88 in a concentric relationship with the support portion 86.
After assembly, the support portion 86 is axially inserted within an aperture 112 in a doorjamb 114. A force applied to the support portion 86 causes an annular flange 113 on the support portion 86 to snap over the edge of the jamb 114 that defines the aperture 112. The flanges 108 and 113 then cooperate to mount the switch 82 on the jamb 114.
Referring to FIG. 8, during closing movement a door portion 116 engages the outer periphery of the flexible portion 88. This causes the nubs 100 and the flexible portion 88 adjacent grooves 94 to cooperate and apply couples to the peripheral portions 96 of contact 98. These couples decrease the concavity of contact 98 and move the contact 98 out of engagement with contact 90 to the position shown in FIG 8. The peripheral portions 96 slide within the grooves 94 during the decrease in the concavity of contact 98.
Referring to FIG. 10, an adjustable embodiment includes a switch 120 received within a mounting cup 122 and adjustably positioned therein by circumferential nubs 124.
The invention thus provides doorjamb switches wherein the opening and closing of the switches is accomplished by varying the concavity of disklike contacts to open and close the switches.
What is claimed is:
l. A normally closed switch comprising: a housing including a support portion and a flexible portion; a first contact mounted within the housing and fixed with respect to the support portion; a concave disklike second contact having a portion of the periphery thereof slidably mounted within the housing, the second contact being integrally biased by the concavity thereof to position a central portion thereof in engagement with the first contact thus closing the switch; and means on the flexible portion acting on the second contact during flexing of the flexible portion to vary the concavity thereof and move the second contact out of central portion of engagement with the first contact to open the switch, the portion of the periphery of the second contact sliding within the housing during the variation of the concavity of the second contact.
2. A normally closed switch comprising: a generally annular housing including a generally annular support portion and a generally annular flexible portion, the portions being secured to each other in a concentric relationship; an annular first contact concentrically mounted within the housing and fixed with respect to the support portion; a concave disklike second contact having a portion of the periphery thereof slidable mounted within the housing to concentrically position the second contact within the housing, the second contact being integrally biased by the concavity thereof to position a central portion thereof in engagement with the first contact thus closing the switch; and means on the flexible portion acting on the second contact during flexing of the flexible portion to vary the concavity thereof and move the central portion of the second contact out of engagement with the first contact thus opening the switch, the portion of the periphery of the second contact sliding within the housing during the variation of the concavity of the second contact.
3. A normally closed switch comprising: an annular housing including an annular support portion and an annular flexible portion, the portions being secured to each other in a concentric relationship; an annular first contact mounted within the housing and fixed with respect to the support portion in a relationship concentric therewith, the first contact having a central aperture therein; a concave disklike second contact having a portion of the periphery thereof slidably mounted within the housing to concentrically position the second contact within the housing, the second contact having a central projection received within the aperture of the first contact and integrally biased by the concavity of the second contact into engagement with the first contact; and a central actuating portion on the flexible portion abutting the central projection of the second contact during flexing of the flexible portion to increase the concavity thereof and move .the second contact out of engagement with the first contact to open the switch, the portion of the periphery of the second contact sliding within the housing during the increase of the concavity of the second contact.
4. A normally closed switch comprising: a generally annular housing including a generally annular support portion and a generally annular flexible portion, the portions bein secured to each other in a concentric relatlonship; an annular lrst contact mounted on the support portion in a relationship concentric therewith; and a concave disklike second contact having a portion of the periphery thereof slidable mounted within the flexible portion to concentrically position the second contact within the housing, the second contact being integrally biased by the concavity thereof into engagement with the first contact to close the switch, the flexible portion engaging the portion of the periphery of the second contact during flexing of the flexible portion to decrease the concavity thereof and move the second contact out of engagement with the first contact to open the switch, the portion of the periphery of the second contact sliding within the flexible portion during the decrease of the concavity of the second contact.
3 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,619,530 Dated November 9, 1971 Invenmn's) Patsy DeVincent and Sidney G. Dunford It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:
r In the Abstract, line 10 "contact of", should read I contact on Column 3, line 28, delete "second contact out of central portion of" and insert central portion of the second contact out of line 39 "slidable" should read slidably Column 4, line 33, "slidable" should read slidably Signed and sealed this 2nd day of Hay 1972.
(SEAL) Attest:
EDWARD M.FLETGHER, JR ROBERT GOTTSGHALK Attesting Officer Commissioner of Patents

Claims (4)

1. A normally closed switch comprising: a housing including a support portion and a flexible portion; a first contact mounted within the housing and fixed with respect to the support portion; a concave disklike second contact having a portion of the periphery thereof slidably mounted within the housing, the second contact being integrally biased by the concavity thereof to position a central portion thereof in engagement with the first contact thus closing the switch; and means on the flexible portion acting on the second contact during flexing of the flexible portion to vary the concavity thereOf and move the second contact out of central portion of engagement with the first contact to open the switch, the portion of the periphery of the second contact sliding within the housing during the variation of the concavity of the second contact.
2. A normally closed switch comprising: a generally annular housing including a generally annular support portion and a generally annular flexible portion, the portions being secured to each other in a concentric relationship; an annular first contact concentrically mounted within the housing and fixed with respect to the support portion; a concave disklike second contact having a portion of the periphery thereof slidably mounted within the housing to concentrically position the second contact within the housing, the second contact being integrally biased by the concavity thereof to position a central portion thereof in engagement with the first contact thus closing the switch; and means on the flexible portion acting on the second contact during flexing of the flexible portion to vary the concavity thereof and move the central portion of the second contact out of engagement with the first contact thus opening the switch, the portion of the periphery of the second contact sliding within the housing during the variation of the concavity of the second contact.
3. A normally closed switch comprising: an annular housing including an annular support portion and an annular flexible portion, the portions being secured to each other in a concentric relationship; an annular first contact mounted within the housing and fixed with respect to the support portion in a relationship concentric therewith, the first contact having a central aperture therein; a concave disklike second contact having a portion of the periphery thereof slidably mounted within the housing to concentrically position the second contact within the housing, the second contact having a central projection received within the aperture of the first contact and integrally biased by the concavity of the second contact into engagement with the first contact; and a central actuating portion on the flexible portion abutting the central projection of the second contact during flexing of the flexible portion to increase the concavity thereof and move the second contact out of engagement with the first contact to open the switch, the portion of the periphery of the second contact sliding within the housing during the increase of the concavity of the second contact.
4. A normally closed switch comprising: a generally annular housing including a generally annular support portion and a generally annular flexible portion, the portions being secured to each other in a concentric relationship; an annular first contact mounted on the support portion in a relationship concentric therewith; and a concave disklike second contact having a portion of the periphery thereof slidably mounted within the flexible portion to concentrically position the second contact within the housing, the second contact being integrally biased by the concavity thereof into engagement with the first contact to close the switch, the flexible portion engaging the portion of the periphery of the second contact during flexing of the flexible portion to decrease the concavity thereof and move the second contact out of engagement with the first contact to open the switch, the portion of the periphery of the second contact sliding within the flexible portion during the decrease of the concavity of the second contact.
US33310A 1970-04-30 1970-04-30 Doorjamb switch Expired - Lifetime US3619530A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3717735A (en) * 1971-09-14 1973-02-20 Tapeswitch Corp Of America Flex sensitive normally closed ribbon switch
US3860771A (en) * 1973-10-29 1975-01-14 Chomerics Inc Keyboard switch assembly with dome shaped actuator having associated underlying contactor means
FR2496973A1 (en) * 1980-12-23 1982-06-25 Peugeot Automobile courtesy light switch operated by opening door - has deformable cap enclosing spring contacts and sealing device acting against corrosion by ingress of liquid

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2409483A (en) * 1944-01-24 1946-10-15 Gen Motors Corp Electric switch
FR1030050A (en) * 1950-12-22 1953-06-09 Electro Mecaniques Soc Et Improvements to current limiters
FR1352256A (en) * 1963-01-04 1964-02-14 Cem Comp Electro Mec Precision snap-action mechanism
GB1056410A (en) * 1965-10-12 1967-01-25 Ford Motor Co Electrical switches

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2409483A (en) * 1944-01-24 1946-10-15 Gen Motors Corp Electric switch
FR1030050A (en) * 1950-12-22 1953-06-09 Electro Mecaniques Soc Et Improvements to current limiters
FR1352256A (en) * 1963-01-04 1964-02-14 Cem Comp Electro Mec Precision snap-action mechanism
GB1056410A (en) * 1965-10-12 1967-01-25 Ford Motor Co Electrical switches

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3717735A (en) * 1971-09-14 1973-02-20 Tapeswitch Corp Of America Flex sensitive normally closed ribbon switch
US3860771A (en) * 1973-10-29 1975-01-14 Chomerics Inc Keyboard switch assembly with dome shaped actuator having associated underlying contactor means
FR2496973A1 (en) * 1980-12-23 1982-06-25 Peugeot Automobile courtesy light switch operated by opening door - has deformable cap enclosing spring contacts and sealing device acting against corrosion by ingress of liquid

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