Патент USA US2117171код для вставки
May 10» 1933~ 2,117,171 G. A. JoVHNsoN ì l UNIT TYPE TUMBLER SWITCH Filed May l1'?,v 1955 ' l G ,E R om, œm AA...m NV. ws s N attentati annui l@ iranl STATES UNIT ma 'rUMBLr-:n s George A. Johnson, Trumbull, Genn., ignor to The Bryant Electric Company, Bridgeport, Conn., a corporations! Connecticut Appunuon _May 1v, lets, sei-iai No. 22,090 7Claims. as my invention is described in connection with This invention relates to electric switches. More particularly it relates to electric snap the accompanying drawing. switches of the unit type. Switches of the type to which this invention relates are commonly used In the drawing:--- ` Figure 1. Figure a solid back. ‘ Another object of my invention is to Aprovide a unit type flush snap switch with a, solid back s0 casing and a cover which engages with the cas ing and is held in‘ position upon the casing with out the use of screws, rivets or other metallic se curing members. 2. s _ . Figure 4 is a detail view in elevation of one of the stationary contact assembly plates. 1I Figure 5 is an elevation ‘viewof the opposite side oi' the plate shown in Figure 4.' Figure 6 is a side elevation view of my inven tion. likelihood that the back plate might be pushed It is an object of my invention to provide a unit type flush snap switch with a casing which has :o invention with the section taken on line 1_4 of Figure 'ï is an end elevation view oi' my inven- go 20 away from the casing or might be loosened sum 25 v - Figure 3 is a transverse section view oi’ my was exerted upon the switch handle there was \ .. Figure ilA is a longitudinal~ section view of my invention with the section taken on line 2--2'01 upon a supporting bridge of length just suiiicient to bridge across the opening of a single gang 10 switch box. Heretofore switches of this type have had their mechanism inserted in the switch casing from the rear, and the mechanism has been held in place by a iibre or metal back plate which in turn is held by a metallic securing mem 15 ber engaging with the sides or _top of the casing. These prior constructions have been disadvanta geous for the reason that when undue pressure " . tacts in place but with the movable parts of the i The switches are mounted usually in openings ` switch mechanism removed. operation of the switch. ' ¿ . ‘of the switch casing’with the stationary con- g switch box behind a single gang flush or wall plate. contacts or other parts and of the switch mecha nism and inthat way interfere with the proper` . Flgurel is a plan view looking into the interior ` 5 singly or in pairs or in threes in a single gang ciently to permit undesirable movement of the . ' tion.' . Referring to the drawing it will be noted that the switch mechanism of my invention ishoused' within a one-piece-hollow casing il oi’ insulating material which has plane side walls Ils and a solid g5 back wall Nb, and end walls lle which are each provided with lower and upper apertures for bind- i ing screws of wire terminals I2a, l2b, |2c, and l2d. , In the side walls los adjacent the end walls there are provided pairs of opposed slots I I and Il into 30 which may slide from the front of the casing sta_- tionary contact assembly plates il, Il oi' insulat « ing material such as nbre. "These assembly plates , I8, i9 are or may be substantially alike for each end. The plate I8 has upper and lower metallic 35 the switch mechanism is held-in the casing by _ terminal plates 22 and 20 respectively, secured to one face thereof, with terminal screws |2a> and I2b engagement of the cover therewith. Another object of 'my invention is to provide a respectively screwed therein. Mounted on the insulating plate I8 are spaced stationary contacts snap switch of the above type with a switch mech 40 anism that may quickly and easilybe assembled 24 and 26 of U-shape with lateral extensions from 40 their arms passing through the insulating plate Il in the casing by insertion from the front. Another object of my invention is to provide a adjacent the top corners and into and through extensions or branches of the terminal. plates 2l switch of the above type in which the switch mech anism and contacts are insertable in the front and 22 respectively. To secure these contacts to 45 and are held in position by the engagement of their-respective terminal plates the ends of their 45 Another object oi my invention is to provide a 35 snap switch of the above mentioned type in which the cover which in addition to its function of se curing the switch parts in position also shields them from any metallic or current carrying party at the front of the switch. . extensions may be peened over. The stationary ` contact assembly plate I9, although of similar construction to the assembly I8, has the sta tionary contacts 28 and It at the bottom of the Another object of my invention is to- provide a ' plate instead of at the top in order that the blades 50 snap switch of the above type in which the cover of the mutually insulated movable contact mein automatically secures itself to the base when the bers 32, 34 may engage with contacts 26, 30, and 24, 28 respectively in closed circuit position loi! the cover is seated in its assembled position. Other objects and advantages of my invention 55 will become apparent to those skilled in the art i -These movable bridging contact members 32. 55 50 switch. ' ` ’ 2,117,171 34 may be made up from thin sheet metal stamp therefore I do not nmit myself to the specific ings so as to possess resilience and engage the iorm oi the'invention as- disclosed in the accom stationary contacts with spring pressure. These movable bridging. contacts are mounted upon lateral ~outward extensions "e from the arms of a -panying drawing. ‘ 1. In a snap switch, an insulating casing, hav- ` U-shaped switching member ll which may be ing integral bottom and side walls,'a swinging 1 oscillated by a switch spring, 38 one end of which U-shaped switching member, a pair of parallel is engaged with the transverse portion oi' the ' plate-like formations of insulating material ex switching member while the other end is engaged tending up from said bottom wall and providing with a manually movable lever Il oi shape as shown in Fig. 2, which is pivotally mounted upon a transverse pin 42 passing through >the cover 44 bearings for the ends oi' the legs of said switch ing member and supporting said switch member in inverted position. a cover for said casing, an for the switch casing. operating member pivotally mounted in said cov 'This cover may be made of insulating material er and extending therethrough, and snapping mechanism between the legs of said switch mem 16 ber for actuating said switching membei. and may have a portion “a iitting within the top :of the switch casing Il to completely close the upper end of the casing except for an aperture pro vided for the insulating handle Il of the manually 2. In a snap switch', an insulating casing hav- . ing integral bottom and side walls, stationary switch contacts at opposite ends of said casing movable lever lll. This handle and the cover form a completely closed front for the switch to prevent access oi any tool through the cover to having wire terminals with screws extending into « 'said casing, a swinging switching member, a pair ' the switch mechanism or current carrying parts. of parallel plate-like formations of insulating ma 'I'hus the cover and handle provide a "dead” terial extending up from said bottom wall and iront for the switch. The cover also has a cen having V-notch bearings for said switching mem tral upstanding rectangular neck 44h which is‘ ber, the edges of said formation being spaced adapted to iit` in a complementary aperture in a from the ends of said casing to provide roomiîorV conventional ilush or wall plate (not shown) .Y said screws, a cover for said casing, an operating For rockably supporting the switching member member pivotally mounted in said cover and ex 36, there are formed in the bottom of the switch tending therethrough, and snapping mechanism casing a pair of parallel platelike hearing mem for actuating said switching member. " „ f _ bers 5U which are provided with V notches 52 3. In a snap switch, an insulating casing hav into which the legs of the switching member bear. ing integral bottom and side walls, ‘a‘ pair of By reference to the drawing it will be noted spaced plate-like insulating members parallel that the lower end of the actuating lever 40 to one side wall, a swinging U-shaped 'switching moves in the lower Dart of the switch casing. It member supported in inverted position by the may now be observed that by movement oi'the ends of its legs engaging in notches in said plate switch handle 4i and the actuating lever 40 like members, an insulating cover i'or said cas about the pivot 42 of the handle-and lever, the _ ing, snapping mechanism for actuating said con line of action of the switch spring 38 will be tacts,- and insulated operating means pivotally 40 carried through the piane of the switching mem mounted in said cover and having :a portion mov ber 36 and thereby cause movement of lthe switch ing below said switching member, ïsaid cover and ing. member from one side of its V notch bear ’ operating means forming a "dead‘r’ front for the , ings to the other, and corresponding movement oi the movable switch contacts with a snap ac 4. In a snap switch, an insulating >casing with tion. = integral- back and side walls, a cover fitting vwith One of the novel features of my invention is in the. front oi said casing, operating mîeans piv the means ior securing the cover to the switch otally mounted in -said cover, notched bearing casing. 'I'his means will now be described. In members integrally formed with the bottom of the side walls ills oi _the switch casing adjacent said casing, a U-shaped swinging switching mem i the top thereof and centrally positioned are co ber supported by said bearings in inverted posi axial apertures ,54 vwhich are adapted toreceive tion by the ends- of its legs engaging in Asaid bear coaxial lugs 56 formed integrally and extending ings, and a spring connected to said operating» laterally from the sides of the cover M. These means and said switching member, the travel of lugs or extensions may be- substantially circular said switching member under the iniiuence of 55 but beveled downwardly as illustrated in Figure 3. said spring being limited by its legs abutting the When applying the cover to the casing there is sides of said bearing notches. suflicient resiliency of the walls- its to permit the A5. In a snap switch, an insulating casinglhav- ' beveled surfaces of the projections to act as ing integral back and side walls, a cover iitting wedges to force the walls apart until the lugs are within the iront of said casing, switching mech seated in the apertures il. Thus upon applying - anism' within said casing, an «iper-ating member the cover to 'the casing. the cover will snap into placeA and be maintainedïthere permanently or of said switching mechanism extending through ' until special tools are used to'. permit the remov said cover, notched bearing members formed in tegrally with the bottom of said casing. and a . al »oi the cover. AU-shaped switching member of' said switching ` -. I have found that insulating materiels suen es mechanism supported by said bearing members, condensation products of phenols and formalde-- _the travel of said switching member'under the hyde,~ and phenolic resins, although‘substantially inñuence ot said spring being limited by its legs rigid for most purposes ~suiiicient resil abutting the sides o! said bearing. notches,- the iency4 for use in making the cover and the casing edgesV of said bearing member being spaced from of my invention. Obviously any other insulating the ends of the casing to 4provide room. for ter material u l t . »cui l 1 - _characteristics be used for making .the-casing invention. . V- :f ~` ' could ' screws extending in i'rom the .ends of said andcoverof my 4casing 6. In'a snap ' ,- ' ` _Many modiiications within the _scope oi my in 751 vention will .occur to those. skilled in the' art, an »insulating casing hav ing integral bottom and side walls, stationary switchcontacts at .opposte ends of said casing 70. 9,117371 in the front of said casing, operating means piv having wire terminals with screws extending into said casing. a swinsinil switching member,V a pair oi parallel plate-like formations of insulating extending therethrough. snapping mechanism for said casing. a >U-sl'iaped swiniiing switchinß member supported by said bearings in inverted position by the ends o! its legs engaging in said bearings, a spring connected to said operating means and said switching member, the travel oi said switching member under the influence oi said springs being limited by its legs abutting _the actuating said switching member, and means on said cover and casing to automatically lock said casing and cover together when said cover is in ing and cover together when said cover is in material extending up from said bottom wall and V.having V`-'notch bearings for saidv switching mem 5 ber, the edges of said formation being spaced from the ends of said casing to provide room tor said screws, a cover tor said casing, an operating member pivotally mounted in , said cover and 10 otaiiy mounted in said cover. notched bearing members integrally formed with the bottom oi serted in the front of said casing. 7. In a snap switch. an insulating casing with integral back and side walls, a cover ntting with sides of said bearing notches, and means on said cover and casing to automatically lock said cas- _ serted in tlm iront oi said casing. GEORGE A. JOHNSON.