US1193606A

US1193606A - Klatt

Info

Publication number: US1193606A
Authority: US
Publication date: 1916-08-08
Anticipated expiration: 1933-08-08

Description

C. D. PLATT.

SNAP SWITCH.

APPLICATION FILED SEPT- 10, i915.

Patented Aug. 8, 1916.

these parts is effected in the present disclogage 'in bearing openings 43 in the lower ends of the side portions 26. One of the bearing openings a3 is shown provided with an entrance slot 4% opening thereinto to .admit one of the lugs 42 after the other lug 4:2 has been engaged in the other bearing opening. The contact-making lever cooperates with suitable contact devices, said devices consisting in the present disclosure of two relatively spaced apart contacts 45 which are bridged by the contact-making lever.

The snap action is secured by a spring 47 having its lower end engaged with a loop 48 formed on the lower or free end of the contact-making lever and its upper end anchored at a point above the pivotal connection between the two levers. In the illustration the upper end of the spring is hooked over the pivot pin 29. This spring, thus connected constitutes the two levers of a spring toggle as will be evident from Fig. 3.

The contact-making lever, swinging as it does below the stop bars 16 and 17 is limited in its movement by engagement with the lower edges of these stop bars.

The operation will be clear from the-fore going. lVhen the push button 33. in Fig. 3 for instance, is depressed the switch operating lever will be rocked to straighten out the toggle constituted by the two lever members and as soon as the central point is reached the spring will act to throw the contact-making lever overtoward the left with a quick snap movement and into forcible engagement with the relatively stationary contacts. 'hen the other switch button is depressed an opposite movement will be effected and the circuit will be broken with a quick movement. It will be noted that in breaking the circuit the spreading action of the toggle will have the effect of causing the contact-making lever to slide over the surface of the contact and thereby wipe the contact free i any foreign matter. In this sliding action the contacthas a compound movement embodying first a con'lparatively straight forward or outward movement and then a partial rotary movement which tends to free the contact lover of the stationary contacts and give it a start on its swinging movement. This is due to the fact that as the operating lever rocks on its pivot, the pivotal connection between the two levers swings in a circular path, first forcing the contact-making lever outward, causing it to slide over the stop bar and then rocking the lever on the stop bar as a. fulcrum. As the lever fulvrums on the stop bar the contact end ofine lever swings in a substantially circular path tending to free it of the contactsrand to give it a start preliminary to I i the snap movement given it by the spring.

The switch parts are preferably protected by a cover. 50 closing the open end of the hollow switch base and held in place in the illustration by being seated on a shoulder 51 on the base beneath the supporting bar 8. TIPS cover is provided with opening 52 for the push buttons.

It will be evident that the invention may, be embodied in different kinds of switches. In Fig. 6 for instance the switch movement is shown applied to a pendant type of switch. Here the support is designated 55,

the oscillating switch lever 56, and the contact-making lever 57, the parts operating as before described, except that in this case. the

switch operating lever is provided with a projecting lug 58 at the center thereof which engages at '59 with a double-ended push button 60 extending through the shell 61 of the switch.

.What I claim is 1. In a quick throw switch, an insulating base, a support mounted on said insulating base, a rocking switch operatihg lever pivoted on said support having side arms extending in opposite directions from the point of pivotal support and angularly extending arms dependent from the point of pivotal support, stops carried by the support on opposite sides of the pivotal center of the operating lever and disposed beneath the side arms of said operating lever to be engaged thereby and limit the throw of said operating lever, a contact making lever pivoted to the dependent arms of the switch operating lever and swinging to opposite sides into engagement with the stops on the support, a spring connected on its lower end to'the free end of the contact making lever and anchored on its upper end at a point above the pivotal connections between the levers and push buttons connected to the respective side arms of the switch operating lever.

2. In a quick throw switch, a support having pivot lugs and spaced apart stop bars disposed at opposite sides of the pivotal axis of said lugs, a rocking switch-operating lever pivoted on said lugs and limited in its rocking movements by engagement with the upper sides of said stop bars, a dependent contact-making lever pivoted to said switchoperating lever below the pivotal support of said switch-operating lever and limited in its swinging movements by engagement with the under sides ofthe stop bars and a spring connection between the free lower end of the swinging contact-making lever and a point above the connection between the two levers to thereby constitute said two levers a spring toggle.

3.*In a quick throw switch, a support having attaching lugs at the ends thereof, spaced upstanding pivot lugs between the attaching lugs and dependent arms at opposite sides of the pivot lugs carrying stop bars, a rocking switchoperating lever pivotally ,supported between the pivot lugs and limited in its rocking movements by'engagement with the upper sides of said stop bars, a dependent contact-making lever pivoted to said switch operating lever below the pivotal support of said switch-operating lever and limited in its swinging movements by engagement-with the under sides of the stop bars and a spring connection between the free lower end of the swinging contactmaking lever and a point above the connection between the two levers to thereby constitute saidtwo levers a spring toggle.

4. In a quick throw switch, a support hav ing spaced apart pivot lugs and spaced stop bars disposed at opposite sides of the pivotal axis of said lugs, a rocking switch-operating lever having spaced side portions pivotally engaged. between the spaced pivot lugs and oppositely extending arms engaging the upper sides of the stop bars to limit the rocking movements of said lever, a dependent contact-making lever having spaced sides pivoted to the spaced side portions of the switch-operating lever and a spring connection between the free end of the contact- 1 making lever and a point above the pivotal connec ion between the two levers.

5. in a quick throw switch, a support having spaced apart pivot lugs and spaced stop bars disposed at opposite sides of the pivotal axis of said lugs, a rocking switchoperating lever having spaced side portions engaged between the spaced pivot lugs and oppositely extending arms to engage the upper sides of the stop bars, a pivot pin passed through the pivot lugs and the spaced side portions of the switch-operating lever, a dependent contact-making lever having spaced sides pivoted to the spaced side portions of the switch-operating lever and an attachment loop on the lower end thereof and a spring connected to the pivot pin at its upper end and to said attachment loop at its lower end.

6. In an electric switch, a support, a switch operating lever pivoted on said support and provided with spaced dependent side portions, a*contactmaking lever having spaced sides pivotally engaged with the side portions of the switch operating lever, one of said levers having bearing openings in the side portions thereof and the other of said levers having angularly projecting lugs for engagement in said bearing openlngs, one of said bearing openings having an entrance slot out thereinto from the edge of the member in which it is formed to receive the angular lug on the other member, and a spring connection between the free end of the contact-making lever and a point above the pivotal connection between the two levers. CLARENCE D. PLATT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

- Washinzton, D. G. a