Патент USA US2405679код для вставки
G. lA. wAHLsTRöM PUSH BUTTON-SWITCH Filed Sept. 1l, 1944 ' n' ,405,679 * Patented Aug. 13, 1946 2,405,679 ",¿~UN`1TE5D STATES PATENT OFFICE Gustaf Adolf Wâhlström, Akeshov, Sweden, as signor to Telefonaktiebolaget L. M. Ericsson, Stockholm, Sweden, a company of Sweden Application September 11, 1944, Serial No. 553,609 In Sweden July 30, 1941 4 Claims. The invention relates to a push button switch provided with an operating finger pivoted in the push button, said linger being adapted upon de pression of the button alternately to operate a cradle to two different positions, said cradle being pivoted in the base. It is an object of the inven tion to provide a switch of the present type giving an effective, momentary closing and interruption (C1. 200-67) 2 position. The rollers I ‘I thereby press against the left portion of the lever I3 and the contact device I4 takes the making position II. If the button is now pressed down, the cradle 6 is turned round the pivot 'I to the left as shown in Fig. 3 and the rollers I'I thereby roll on the lever I3, pressing against the part of the lever I3 lying to the right of the pivot I2 in such a way that this part of the lever gets a turning moment l0 directed downwards. The contact member I4 on of the current and preventing the stationary con tacts from being burnt when the current is inter rupted. the lever I3 thereby has been brought from the The invention will be more closely described making position II to the breaking position I6 with reference to the enclosed drawing. as appears from Figs. 2 and 3. This displace Fig. 1 is a vertical section through the push ment happens immediately before breaking of the button axis. 15 circuit. When the different elements have ob Figs. 2_4 are vertical sections along the line tained the positions shown in Fig. 3, the part of A-A in Fig. 1 showing the elements of the switch the lever I3 lying to the right of the pivot I2 in different positions. Fig. 5 is a front View of will suddenly be turned downwards thereby caus the contact arms and the stationary contacts ing the interruption of the current. The cradle when the arms are in the position shown in Fig. 2. 20 6 is thereby turned to the position shown in Fig. A push button I is movably arranged in two 4. Said displacement of the contact member I 4' standards 2, a two-armed operating finger 3 of from making-to breaking position is very advan insulating material being pivoted in the push but tageous since the contact plate I5 then can not ton. Upon depression of the push button the two be burnt in the making position. The lever I3 arms of the operating finger cooperate with the 25 thus performs an angular movement in relation cradle 6, said cradle being mounted to oscillate to the contact plate at the breaking of the cir on the pivot 'I in the base 5. The cradle 6 con cuit. On account of this movement it is possible sists of two sector-formed plates 6a, 6b and a to provide the contact plate with the above men cross-piece 8. The plates are each provided with tioned swell I6 inthe breaking position. The cams 9, I0. The cradle is turned in a known 30 contact springs are thereby more tensioned in this manner per se from one end position to the other position and the breaking of the circuit will occur upon depression of the button I, A double, two more quickly. Upon repeated> depression of the armed lever I3 is mounted on the pivot I2 in the push button the arm 3 will cooperate with the cradle 6, the arms I3a., I3b thereby being pro edge I0 of the cradle thereby turning the cradle vided with contacts I4 cooperating with station 35 to the position shown in Fig. 2. The rollers I‘I ary contacts I5, each of said contacts being pro are thereby rolling along the lever I3 from the vided with a plane surface II for making the position shown in Fig. 4 until they occupy such circuit (“making-position”) and a surface for a position on that part of the lever I3 lying to breaking the circuit (“breaking-position”), said last mentioned surface being provided with a swell 40 the left of the pivot I2, that a turning moment is obtained which is su?licient to turn the lever I6. The lever I3 is operated by a device I'I con I3 and the cradle 6 to the positions shown in sisting of two rollers I'Ia and I'Ib fastened on a Fig. 2. pivot I8. The pivot I8 is mounted in an arm Through thefcombination of the sector-formed I9 being movable in the direction of the depres cradle 6 and the lever I3 which is carried by a sion of the button in notches 20 in the base. 45 pivot I2, mounted in the upper part of said cradle Said arm I9 also carries a bar 23 of insulating and being moved on the turning of the cradle 6, material, a coil spring 25 being arranged around it also is rendered possible to make the base very said bar’and ñxed between the cross-piece 26 of low through maintaining the remaining ordinary the arm 3 and a flange 24. The rollers I'I con dimensions. ~ sequently engage the lever I3 under spring ten I claim: sion and on movement of the arm 3 the roller I'Ia 1. A push button switch comprising a base, a will roll on the lever I3a and the roller I'Ib on push button, a cradle pivotally mounted in the the lever I 3b. base, stationary contacts on said base, means Fig. 2 shows the lever I3 in the making posi tion, the cradle 6 thereby occupying its right end Ylus operable during successive actuations of said but ton to alternately turn said cradle into two dif 2,405,679 3 ferent positions, a two armed lever, contact mem bers carried by said lever and engageable with said stationary contacts, means mounting said lever to pivot in said cradle about an axis dis placed from the pivotal mounting of the cradle, spring means exerting pressure on and tending to turn >,said lever about its pivot, the point of 4 3. A push button switch as claimed in claim 1 wherein said spring means includes a bar mov able in the direction of movement of the push button, a roller on said bar engaging said lever, and a spring operable to apply said roller to said lever and to restore the push button to its initial position. y 4. A push button switch as claimed in claim 1 application of pressure of the spring means on wherein Vat least said stationary contacts are pro said lever shifting along the lever from one arm vided with raised portions coacting with the con to the other arm thereof as said cradle is turned Y10 (from one position to the other. tact members at the moment the contact between 2. A push button switch as claimed in claim 1>- ' Y-saicl‘contacts and contact members is broken. wherein said spring meansnormally tends to re-> store the push button to its initial position. GUsTAF ADOLF WÃHLsTRöM.