US1582376A - Switch for electric circuits - Google Patents

Description

A ril 27, 192

V. BREEZE v swncn FOR EL'ECTRIC cmcun's Filed June 1, 1922 2 Sheets-Sheet 1 April 27, 1925.

V. BREEZE SWFI'CH FOR ELECTRIC CIRCUITS Filed June 1. 1922 2 Sheets-Sheet 2 I I, i v '37 8 27 ll I If g3 )A'bfilV/YIM Qz/ q v Z5 v6 :5 I I 1. T- 19 I Patented Apr. 27, 1926.

sszsze VICTOR BREEZE, F BRIGHTON, ENGLAND.

swrron ron nnncrnrc CIRCUITS.

Application filed June 1,

T 0 all whom it may concern:

Be it known that I, Vroron Bnnnzn, a subject of the King oi Great Britain, and resident of Brighton, in the county of Sussex, England, have invented certain new and useful Improvements in or Relating to Switches for Electric Circuits, of which the following is a specification. V

This invention rclatesto electric switches more particularly of the push-button type, and has for its object to provide aswitch of simple construction applicable for use with inductive currents and wherein the injuriouseliiects of arcing are prevented or reduced to a minimum.

The present invention comprises an electric circuit switch having fixed and movable contacts, wherein the contacts are mounted in a tubular section of insulating material.

u'eierably provided with covering plates consisting of sheets oi insulating material.

Two embodiments of the invention as applied to a start and a stop switch res )ectively are'illustrated by the accompanying drawings, wherein Figure 1 is a front elevation of a-start wit-ch having a. removable cover, Figure 2 the same with the cover removed, Figure 3 an inverted sectional plan of the same, while Figure 4 is a. front ele ation of a stop switch, Figure 5 an inverted plan of the same, Figure 6 a sectional plan of the same, and Figure? a side section of the same.

In these drawings 2 is the tubular section of insulatin material, 3, 3, the fixed stops or contacts and 4t, 4t the movable stops or contacts. 7 and 8 are respectively the front and rear sheets of insulating material, 9 and 10 are respectivelythe frontand rear portions of acasing, the portions being bolted together by screws and nuts 11.

The tubular section 2 of insulating mate rial is of semi-circular shapedesignated to fit-easily in the parts 9 and 10 of the casing and its lower portion is in the form of a diametrical wall adapted to rest at each side on ledges 12," 12 formed in the casing. The upper portion of the tubular section 1 1s flattened at 13 to clear the screws 11, while the centre of its lower portion is troughshaped to receive a bearing bracket 15 for a switch plunger 16, the. bracket being fixed in the trough by a screw and nut 17. The bearing bracket 15 consists of a sheet f n etel bent up and drilled to forn a bear ng The open ends of the tubular section are 1 22. Serial No. 565,177.

forthe slidable plunger 16. The plunger 16 is provided atitsfront end with a push piece 18 of insulating material. In the rear end of the push piece l8 also bears one end oi a spring 19 the other end thereof bearing against the upright portion of the bracket The inner end. of the plunger 16 has afeixed thereto a cross piece or bridge 20 on the ends of which are rotatively mounted contact stop rollers i, 4, arranged in slots in the ends oi the cross piece 1 20 and mounted on pins 21 oi which the ends are secured to the cross piece at each side of the slot. plunger 16 between washers 22 of insulating material. r I

-The fixed contact rollersflS, 8 are rotatively mounted on pins 23 passing through the lower wall of the tubular section 2 oi insulating material. and securing thereto terminal blocks 2e, 241, having screws 25, 2 5 for connecting thereto the ends ofthe leads. The ends of the leads are introduced through a cable carrying tube or boss screwec into the opening 26 provided in the bottom of the casing: 10. The back of the casing 10 is, proi-idedn'ith holes 27 whereby it can be fixed by screws to any-suitable fiXt-ure. A boss 28 is provided in the front portion 9 of the casing in which the push piece 18 is arranged to slide freely.

t will be seen that the tubular. section 2 extends into both the front and back portions 9 and 10 of the casing which hold it between the front and rear sheets 7 and 8 of insulating material. It willalso be seen that as the insulating material is notsecured to the walls of the casing, the tubular section in which the fixed and movable con tacts are mounted independently can be removed completely from the casing with thetubular sect-ion, this is facilitated by the lead terminals on the outside ot the tubular section being arranged to extend freely into a space provided in the lower portion ot the casing. K p

In the start switch, the spring 19 is arranged to hold the movable contacts 4, 4: normally out of engagement with fixed contacts 3,3, arranged behind themes in Figure 8, while in the stop switch the spring 19 is arranged to hold the movable contacts l, l normally in engagement with fixedcontacts 3, 3 arranged in front oi them as in Figure 7,

it The cross piece 20 is secured to the In order to facilitate a slightly rotatable contacting action between the milled surfaces of the rollers 3, 3, and l, 4, the dis ances apart of the centres of each pair is made sutliciently dilierent to facilitate such rotary action.

lVhat I claim and desire to secure by Let ters Patent is A 1. An electric circuit switch comprising fixed and movable contacts and circuit lead connec ing terminals, an open ended sect-ion of a tube of insulating material, a divided casing consisting of two detachable tubular portions each open at one end and closed at the other and adapted when secured together with their open ends in contact to enclore and support in position the section of the tube of insulating material, the movable contacts being opcratively supported independently of the casing by he sides of the section of the tube oft insulating material and the lead connecting terminals extending through the sides of the tube of insulating material into the casing.

2. an electric circuit switch comprising fixed and movable contacts arranged in an open ended section of a tube of semi-circular cross section oi insulating material, a casing for enclosing and supporti g the tube of insulating material and provided at its inner sides with oppositely disposed supporting ledges and terminals for connecting the contacts to the circuit leads, the tired contacts,

extending through the base of the tubular section of insulating material between the supporting ledges in the casing where they are provided with lead connecting terminals the supporting ledges also operating to support the tubular section in the'casing and prevent it rotating therein.

3. An electric circuit switch having in combination, a laterally divided casing consisting of two tubular portions each open at detachably held thereon in the casing by the two portions.

l. An electric circuitswitch comprising a casing, fixed and movable contacts operatively arranged within an open ended section of a: tube of insulating material, associated circuit connecting terminals, the tube of insulating material being mounted in the cusing, a spring returned movable contact op erating plunger extending through an open ing in the front of the casing and provided at its inner end with a pair of contacts having contacting surfaces consisting of the rims oi? rotatable wheels arra red to bridge the tired contacts which a v,.o have contacting surfaces consisting of the rims of rotatable wheels.

5. An electric circuit switch comprising a casing-fixed and movable contacts operatively arranged within an open ended section of a tube of insulating material, associated circuit connecting terminals, the tube 01" insulating material being mounted in the ing, a sprii'ig returned movable contact opcrating plunger extending through an opening in the front of the casing and prmxided at its inner end with a pair of contacts having contacting surfaces cons ing or the milled rims of rotatable wheel arranged to bridge the fixed contacts which also have contacting surfaces consisting ot the milled rims of rotatable wheels.

6. An electric circuit switch comprising a casing, tired and movable contacts operatively arranged within an open ended section of a tube of insulating material, associated. circuit con resting tern'iinals, the tube of insulating material being mounted in the casings, a spring returned movable contact operating plunger extending through an opening in the front of the casing and provided atits inner end with a pair of con tacts having contacting surfaces consisting of the rims oi rotatable wheels arranged to bridge the fixed contacts also having contacting surfaces consisting of the rims o't ro tatable wheels, the distance apart of the axes of wheels of the lixed and movable contacts being slightly diflerent.

In witness whereof I atfix my signature.

VICTOR- BREEZE.

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