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Publication numberUS2923787 A
Publication typeGrant
Publication dateFeb 2, 1960
Filing dateApr 4, 1957
Priority dateApr 4, 1957
Publication numberUS 2923787 A, US 2923787A, US-A-2923787, US2923787 A, US2923787A
InventorsNelson Oscar L
Original AssigneeNelson Oscar L
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Switches
US 2923787 A
Abstract  available in
Images(2)
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Claims  available in
Description  (OCR text may contain errors)

Feb. 2, 1960 o. 1.. NELSON 2,923,787

7 SWITCHES Filed April 4, 1957 2 Sheets-Sheet l Fig. 3

/ 50 1; 56 08W 613%. /0 I BY i h m fi United States Patent O SWITCHES Oscar L. Nelson, Angola, Ind.

Application April 4, 1957, Serial No. 650,625 6 Claims. (Cl. 200-67) This invention relates to the class of electrical switches and more particularly to novel concepts in spring construction in switches.

The primary object of the present invention resides in the provision of a novel switch employing a unique spring arrangement for making and breaking contact.

A further object of the present invention resides in the provision of a novel snap action switch which is substantially foolproof in operation and extremely durable while being inexpensive to manufacture and easy to construct.

Another important object of the present invention resides in the provision of a switch employing a spring which will hold the movable contacts in engagement with fixed contacts so that as soon as the switch is released, the springs willv disengage the movable contact from the fixed contacts without any further operation of the switch.

Still further objects and features of this invention reside in the provision of electrical switches constructed in accordance with the concepts of the present invention which are capable'of being contained in an insulative plastic housing of simple construction, which employ either push-button or toggle actuators, and which are capable of being manufactured in any desired size and adaptable for varied purposes.

These, together with the various ancillary objects and features of the invention which will become apparent as the following description proceeds, are attained by these switches, preferred embodiments of which have been illustrated in the accompanying drawings, by way of example only, wherein:

Figure 1 is a sectional view of a toggle switch constructed in accordance with the concepts of the present invention illustrating the switch in an initial position;

Figure 2 is a view similar to that of Figure 1 but illustrating the switch in a position after actuation;

Figure 3 is a vertical sectional view as taken along the plane of line 3-3 in Figure 1;

Figure 4 is a vertical sectional view through a pushbutton switch prior to actuation thereof;

Figure 5 is a'sectional view similar to that of Figure 4 illustrating the switch after actuation;

Figure 6 is a vertical sectional view as taken along the plane of line 6-6 in Figure 4; and

Figure 7"is a horizontal sectional view as taken along the plane of line 77 in Figure 6 illustrating in particular details of construction of the actuator and springs.

With continuing reference to the accompanying drawings wherein like reference numerals designate similar parts throughout the various views, and with initial attention directed to the embodiment as shown in Figures 1 through 3, reference numeral 10 generally designates a housing constructed of a suitable insulative plastic material such as Bakelite or the like having pairs of contacts indicated at 12, 14, 16 and 18 secured thereto forming terminals to which conductors may readily be attached. These fixed contacts are arranged on the tapered surfaces 2,923,787 Patented Feb. 2, 1960 20 and 22 of the tapered side walls 24 and 26 of the housing.

' 'The housing 10 may be provided with any desired closure or top 30 which has an opening 32 through which an actuation member 34 extends. The actuation member 34 is pivoted as at 36 to the housing and has a recess 38 in the portion 40 disposed within the housing with the recess 38 forming cam surfaces for engaging the arcuate portion 42 of a spring 44 having complementary bowed portions 46 and 48 as well as an end portion 50 disposed within a notch 52 in the housing 10.

The spring carries contacts 54 and 56 bridged by a bar 58 and insulated as at 60 if desired from the spring portion 46 so as to complete an operative electrical circuit from the contact 12 to the contact 14. Likewise contacts 16 and 18 can be bridged by the movable contacts 62 and 64 joined by bar 66 and insulated as at 68 from. the spring 48. Of course, if desired, the insulation 68 and 60 can be eliminated in some arrangements.

In use, actuation of the toggle-like actuation mem ber 34 will cause the spring to shift from the position as is shown in Figure 1 to the position as is shown in Figure 2. Due to the fact that the spring will be compressed when it is in a center position, the switch will function as a snap action type switch. This is because of the cam like action of the surfaces 70 formed by the recess 38 on the toggle actuation member 34.

Referring now to the embodiment of the invention as is shown in Figures 4 through 7, reference numeral 80 generally designates the housing which may be formed in two portions as at 82 and 84 joined together by suitable fasteners 86. Secured to the housing are terminals 88 and 90 it being noted that another set of terminals shown schematically at 92 and 94 may be employed if such is desired. In order to complete an operative electrical circuit from the contact 88 to the contact 90 there is provided the movable contacts 96 and 98 bridged by a bar 100 which may be insulated by a member 102 from the portion 104 of the spring 106 having a portion 108 complementary to the portion 104. The spring has one end thereof seated Within a notch 110 in the housing 80 while the other end of the spring is seated within a notch 112 in an actuation member 114. Two

construction having a shank 118 forming a push-button outwardly of the casing, the actuation member extending through an opening 120 in the casing. Of course, any suitable number of recesses 112 may be provided in the actuation member 114 as desired and an equal number of notches 110 are formed in the housing. The actuation member 114 is provided with tongues 124 and 126 thereon which seat within grooves 128 and 130 formed in the side walls of the housing 80. Hence, the movement of the actuation member 114 is constrained. Stops are provided by shoulders 134 and 136 for limiting the lowermost position of the actuator. When the actuator is moved from the position as is shown in Figure 4 to the position as is shown in Figure 5, the spring 106 is placed under stress bowing the spring even further and causing the contacts 96 and 98 to engage the contacts 88 and 90 respectively while if such are provided causing the contacts 140 and 142 to engage the contacts 92 and 94. Of course, if pairs of springs are utilized the device may be utilized to complete operative electrical circuits between other pairs of contacts.

The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the invention as claimed.

What is claimed as new is as follows:

1. A switch comprising an insulative housing having an opening therein, an actuation member movably positioned in said housing and extending through said opening, a spring disposed in said housing resiliently engaging said housing and said actuation member, said spring including two complementary outwardly bowed portions, fixed contacts in said housing, and movable contacts on said spring engageable with said fixed contacts, said actuation member being pivoted to said housing and having a recess therein receiving an arcuate upper portion of said spring.

2. A manual switch comprising an insulative housing having an opening therein, an actuation member manually movably positioned in said housing and extending through said opening, a spring disposed in said housing resiliently engaging said housing and said actuation member, said spring including two complementary outwardly bowed portions, fixed contacts in said housing, and movable contacts on said spring engageable with said fixed contacts, said actuation member being substantially T-shaped and having a notch therein receiving an end portion of said spring, said housing having grooves therein, said actuation member having tongues riding in said grooves.

3. A switch comprising an insulative housing having an opening therein, an actuation member movably positioned in said housing and extending through said opening, a spring disposed in said housing resiliently engaging said housing and said actuation member, said spring including two complementary outwardly bowed portions, fixed contacts in said housing, and movable contacts on said spring engageable with said fixed contacts, said housing having upwardly tapering side walls, said fixed contacts being secured to said side walls, said spring being stressed when centrally disposed between said side walls with said movable contacts out of engagement with fixed contacts.

4. A manual switch comprising an insulative housing having an opening therein, an actuation member manually movably positioned in said housing and extending through said opening, a spring disposed in said housing resiliently engaging said housing and said actuation member, said spring including two complementary outwardly bowed portions, fixed contacts in said housing, and movable contacts on said spring engageable with said fixed contacts, said actuation member being substantially T-shaped and having a notch therein receiving an end portion of said spring, said housing having grooves therein, said actuation member having tongues riding in said grooves, said housing being provided with a notch therein, the end of said spring remote from said actuation member being disposed in said notch in said housing, said spring being stressed when said actuation member is moved inwardly of said housing, said movable contacts engaging said fixed contacts only when said spring is under stress.

5. A manual switch comprising an insulative housing having an opening therein, an actuation member manually movably positioned in said housing and extending through said opening, a spring disposed in said housing resiliently engaging said housing and said actuation member, said spring including two complementary outwardly bowed portions, fixed contacts in said housing, means communicating said fixed contacts exteriorly of said housing, movable contacts ailixed to each of said outwardly bowed portions, a conductive bridge member electrically conn cting said movable contacts, said movable and fixed contacts being aligned to contact each other to complete an electrical circuit across said fixed contacts, said housing being provided with a notch therein, the end of said spring remote from said actuation member being disposed in said notch in said housing. I

6. A manually operable switch comprising a closed housing having a singular opening therein, an actuation member manually movably positioned in said housing and having a first portion extending through said opening, a flange portion fixed perpendicularly to said first portion and carried by said first portion in said housing, tongues carried by said flange portion, groove in said housing, said tongues adapted to ride in said grooves, a spring disposed in said housing resiliently engaging said housing and said actuation member, said spring including two complementary outwardly bowed portions, a plurality of pairs of fixed contacts carried by and within said housing, means communicating said fixed contacts exteriorly of said housing, a plurality of movable contacts afiixed to each of said outwardly bowedportions, a plurality of conductive bridge members electrically carried by said outwardly bowed portions, each of said bridge members connected between two of said movable contacts for form ing a plurality of pairs of movable contacts, said pair of movable contacts and said pairs of fixed contacts being aligned to contact each other to complete an electrical circuit across said fixed contacts, said housing being provided with a notch therein, the end of said spring remote from actuation member being disposed in said notch in said housing.

References Cited in the file of this patent UNITED STATES PATENTS 1,501,019 Lippincott July 8, 1924 1,676,155 Pfeifer July 3, 1928 1,680,428 Mottlau Aug. 14, 1928 1,733,085 Thomas Oct. 22, 1929 2,238,621 Bletz Apr. 15, 1941 2,255,330 Platz Sept. 9, 1941 2,583,756 Wahlbert Jan. 29, 1952 2,673,468 lmmel et a1 Mar. 30, 1954

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1501019 *Dec 9, 1919Jul 8, 1924Gen ElectricElectric-circuit protective device
US1676155 *Mar 16, 1927Jul 3, 1928Ellsworth CraigCircuit breaker and closer
US1680428 *Apr 25, 1924Aug 14, 1928WestingHouse electric
US1733085 *Jun 13, 1927Oct 22, 1929Adolph A ThomasElectric thermostat
US2238621 *Aug 27, 1938Apr 15, 1941Westinghouse Electric & Mfg CoSnap acting thermal switch
US2255330 *Jun 5, 1941Sep 9, 1941Bulldog Electric Prod CoSwitch
US2583756 *Nov 16, 1948Jan 29, 1952Electrolux CorpSnap switch
US2673468 *Jul 28, 1951Mar 30, 1954Westinghouse Electric CorpLimit switch operating mechanism
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3067301 *Feb 26, 1960Dec 4, 1962Mititaka YamamotoTumbler switches
US3109901 *Aug 24, 1959Nov 5, 1963Irving StraussSnap acting electrical switch
US3229053 *Oct 15, 1962Jan 11, 1966Rca CorpPrinted circuit push button switch device with cam follower contact actuating structure
US3259710 *Nov 4, 1963Jul 5, 1966Irving StraussElectrical switch
US3261928 *Oct 4, 1965Jul 19, 1966Schlesinger Jr Bernard EdwardReciprocable leaf-type switch with rotatable and compressible leaf spring contacts
US3284594 *Nov 4, 1963Nov 8, 1966Strauss IrvingElectrical switch with extending contact arm
US3297156 *Nov 4, 1963Jan 10, 1967Strauss IrvingElectrical switch
US3488461 *Dec 21, 1967Jan 6, 1970NasaDeflective rod switch with elastic support and sealing means
US3688135 *Oct 9, 1970Aug 29, 1972Clare & Co C PPiezoelectrically actuated lever switch
US3699296 *May 21, 1971Oct 17, 1972IbmCatastrophically buckling compression column switch and actuator
US4002871 *Dec 20, 1974Jan 11, 1977Burroughs CorporationColumn leaf spring push-button switch for use in a keyboard
US4002879 *Aug 26, 1975Jan 11, 1977Burroughs CorporationDouble column leaf spring push-button switch
US4056700 *Jan 19, 1976Nov 1, 1977Western Digital CorporationKeyboard assembly momentary contact push button switch with tactile action
US4336429 *Oct 14, 1980Jun 22, 1982Itt Industries, Inc.Switch unit
US4398070 *Dec 23, 1981Aug 9, 1983Alps Electric Co., Ltd.Two-motion push-button switch
US4405845 *Nov 5, 1981Sep 20, 1983Alps Electric Co., Ltd.Push-button switch
US4514600 *Nov 14, 1983Apr 30, 1985North American Philips CorporationVideo game hand controller
US20100038281 *Aug 29, 2008Feb 18, 2010Chih-Ming LinFront Opening Unified Pod with latch component
EP0001208A1 *Aug 10, 1978Apr 4, 1979Motomu MiyamotoStar-delta change-over switch
Classifications
U.S. Classification200/534, 200/437
International ClassificationH01H13/52, H01H23/00, H01H23/12
Cooperative ClassificationH01H23/12, H01H13/52
European ClassificationH01H13/52, H01H23/12