US2594216A

US2594216A - Electric switch of the snap action type

Info

Publication number: US2594216A
Application number: US208634A
Authority: US
Inventors: John O Roeser
Original assignee: EXHIBIT SUPPLY Co
Current assignee: EXHIBIT SUPPLY Co
Priority date: 1951-01-30
Filing date: 1951-01-30
Publication date: 1952-04-22
Anticipated expiration: 1969-04-22

Description

J. o. ROESER 2,594,216

ELECTRIC SWITCH OF THE SNAP ACTION TYPE April 22, 1952 Filed Jan. 30 1951.

IN VEN TOR.

.JMJ: d Zaeser BY %MZ%// 111's AI'J'oRA/Ex Patented Apr. 22, 1952 ELECTRIC SWITCH OF THE SNAP ACTION TYPE John 0. Roeser, Chicago, Ill., assignor to The Exhibit Supply Company, Chicago, 111., a corporation of Illinois Application January 30, 195i, Serial No. 208,634

2 Claims. 1

This invention relates to certain new and useful improvements in electric switches of the snap action type and has for its principal object the provision of an improved construction of this character which will be highly efficient in use and economical in manufacture.

Among the several objects of the invention is to provide a simple and reliable snap action switch of the character hereinafter describedwhich is especially adaptable to be produced in a smaller size and one which is composed of a minimum number of parts without in any way minimizing the reliability and durability of the switch.

Other objects will appear hereinafter.

The invention consists in the novel combination and arrangement of parts to be hereinafter described and claimed.

The invention will be best understood by ref erence to the accompanying drawings showing the preferred form of construction, and in which:

Fig. l is a vertical sectional detail view of the switch embodying my invention and taken substantially on line l--l of Fig. 2;

Fig. 2 is an end view of the same; 1

Fig. 3 is a sectional detail view similar to Fig. 1 by showing the switch blade thereof in a different position;

Fig. 4 is a perspective view of the switch blade and its mountings;

Fig. 5 is a plan view of the switch blade;

Fig. 6 is a plan view to enlarged scale of the blank from which a leaf spring embodied in the invention is formed.

Preferably my improved snap action switch comprises a housing 10 including a removable cover H detachably connected to the housing II) by suitable screws l2. Within this housing is confined the major and principal parts of my switch. In this connection I provide a fixed post 13 to the exterior end I4 of which may be attached a conductor wire (not shown). This post 13 provides at its interior end portion a forkshaped head I 5 providing parallelly extending spaced apart legs l6 and l1.

A switch blade is indicated at I8 and has oneend portion provided with a U-shaped slot I! to provide an inwardly extending tongue 20. The end of this tongue engages a notch 2| formed in the leg IS. The blade at its opposite end portion is provided with an elongated slot 22 through which the leg I 1 projects. In a notch 23 formed in the leg I! is projected an angled end portion 24 of a semi-circularly formed leaf spring 25. The opposite end portion of this leaf spring 25 projects through the slot 22 and provides a 2 T-shaped retaining head 26 engaging the under side of the blade iii.

The blade I 8 at its outer end is provided on opposite sides thereof with contact discs 21 and 21' adapted to engage respectively contact heads 28 and 28'. These contact heads are carried by fixed arms 29 to which conductor wires (not shown) are adapted to be attached.

Separating the U-shaped slot 19 from the slot 22 is a cross bar 30. Bearing upon the cross bar 30 is the end 3| of a slidable plunger 32.

Normally the leaf spring 25 functions to flex the blade l8 in a direction to engage the contact disc 2'! with the contact head 28 as shown in Fig. 1. Pressure of the plunger 32 upon the blade 18 at the point between the legs l6 and I! will flex the blade [8 against the action of the leaf spring 25 so as to bear with snap action the contact disc 21 into engagement with the contact head 28 as shown in Fig. 3. When the: pressure is removed from the plunger 32 the leaf spring 25 biases the blade I8 back to its normal position shown in Fig. 1 with like snap action.

From the foregoing description it is apparent that my improved snap switch comprises relatively few parts and that it is positive and accurate in its operation of momentarily engaging the contact disc 21 withthe contact head 28'. The

arrangement for mounting .the switch blade l8 upon its supporting post I3 is unique and relatively simple, permitting expeditious assembly with the result that the switch may be manufactured at an economical cost.

While I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variation and modification without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as some within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to protect by Letters Patent is:

1. A snap switch comprising a fixed post having a forked-shaped end portion providing spaced apart parallelly extending legs having notches formed in their opposite non-confronting edges, a spring blade having an end portion providing a U-shaped slot to provide a tongue, one of said legs projecting through said slot, said tongue projecting into the notch of said one leg, the opposite end of said blade having an elongated slot form therein through which the other leg pro "j 2,594,216 I Y jects, a semi-circularly formed springleaf having one end portion projected into the notch of said other leg, the opposite end of said spring leaf providing a T-shaped retaining head projected through said elongated slot at the end thereof farthest away from said other leg and engaging the underside of said blade, fixedcontact heads spaced from each other and between which the said opposite end of the blade projects for alternate engagement with said heads, and a plunger having bearing engagement with the blade at a point between the legs.

2. A snap switch comprising a fixed post having a forked-shaped end portion providing spaced apart parallelly extending legs having notches formed in their opposite non-confronting edges,

a spring blade providing a tongue projected into 4 V the notch of one of said legs, the opposite end of said blade having an elongated slot formed therein, a semi-circularly formed spring leaf having one end portion projected into the notch of the other leg and the opposite end portion projected through said slot, said opposite end portion of said spring leaf providing a, retaining between which the said opposite end of the blade projects for alternate engagement with said heads, and a plunger having bearing engagement with the blade atv a. point between the legs.

JOHN O. ROESER.

7 No references cited.