US1625882A

US1625882A - Conduit switch box

Info

Publication number: US1625882A
Application number: US64730A
Authority: US
Inventors: Charles D Converse
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-10-26
Filing date: 1925-10-26
Publication date: 1927-04-26
Anticipated expiration: 1944-04-26

Description

il 1 Apr 927 c. D. CONVERSE connuxw swmcn BOX Filed Oct. 26, 1925 a a i 5 10 Ira/enforc- (War/e17. film/P166.

fliarney,

Patented Apr. 2c, 1927.

UNITED, STATES CHARLES D. CONVERSE, OF LOS ANGELES, CALIFORNIA.

CONDUI'I' SWITCH BOX.

. x. Application filed October 26, 1925. Serial No. 64,730.

This invention particularly pertains to a conduit switch-box of the type employed in encasing side wall switches in the electr1cal wiring systems of buildings. Switch-boxes of this character are ordinarily nailed to studding with their outer open portions projecting beyond the plane of lath earned by the studding and arranged Wl'th' thelr margins extending substantially flush with the surface of plaster applied to the lath, and accordingly, it is necessary to provide some means for supporting the ends of lath terminating adjacent the side of the switchbox facing away from the studding to WlllCh it is applied. This is accomplished by forming the side wall of the switch-box with a 8.11 of spaced arallel vertically extendmg flanges arranged to extend astride-the terminatlons of lath to hold the latter against lateral displacement.

' The primary object of the present invention is to nrovide'a construction whereby the switch-box may be formed of sheet metal and the lath-holding flanges formed integral therewith and without forming the switch-box with objectionable side opemn s.

A further object is to provide a switc box including lath-engaging flanges whlch is formed in one piece from a sheet metal plate.

With the foregoing objects in view, togather with such other objects and advantages as may subsequently appear, the mvention resides in the constructlon and arrangement hereinafter described and claimed and illustrated in the accompanying drawin in which: I

ig. 1 is a perspective view of the switch- Fig. 2 is an enlarged detail in vertical section, as seen on the line 22 of Fig. 1;

Fig. 3 is a plan view of the sheet metal blank from which the switch-box is fabricated; y

Fig. 4 is a detail in section as seen on the-line 4-4 of Fig. 1;

Fig. 5 is a plan view illustrating the application of the invention.

Referring to the drawings more specifically, 4 indicates generally the switch-box which embodies a back wall 5, side walls 6 and 7, and

end walls

8 and 9, and which walls are formed integral from a blank of sheet metal as shown in Fig. 3; the blank embod g a central rectangular portion mdiea by the dotted lines a, b, c and d,

which portion constitutes the back wall 5 v and from the margins ofwhich project rectangular portions adapted on being bent perpendicularly to the portion 5 to form the side and end walls of the box. The

end walls

8 and 9 are formed with side tongues to determine the extent of the projection ofthe box beyond the studding, as shown in Fig. 5.

The essence of the present invention resides in providing the box with integral lath-engaging flanges on the outer face of the wall 7, and is carried into effect by forming the

end wall portions

8 and 9 of the sheet metal blank with lateral extensions as indicated at 14 and 15, each. of which embodies an elongated central portion defined by the dotted lines e, f, g and 71. and includes side

marginal portions

16 and 17 spaced from the uncture of the extensionswith the end panel portions, and includes an end tongue 18. The

lateral extensions

16 and 17 are bent to extend parallel to each other at right angles to the central portions of the extensions, and the latter are bent to extend over and abut against the outer face. of the side wall'7 so that the

flanges

16 and 17 will project outwardly therefrom at right angles thereto, as clearly shown in Fig. 1. The tongues 18 on the outer ends of the extensions are bent to engage margins of openings 19 formed in'the side wall 7, as particularly shown in Fig. 2, thus firmly holding the

extensions

14 and 15 in their overlap ed positions on the outer face of the we 7 and at the same time effecting a connection between the

end walls

8 and 9 and the side wall 7 and tying these walls to gether. t

It will be seen that when the switch-box is completed the

extensions

14 and 15 will pro ect toward each other, and that their respective outturned flange portions 16 and 1 V will be arranged in alignment. The side wall 7 is thus formed with two pairsof spaced outwardly projecting flan es, which flanges are laterally spaced such stance as to form a gap to receive lath C with the flanges extendin in close roximity to the opposite sides 0 the lath .isposed therebetween, as shown in Fig. 5.

In order to inset the lath-engaging members relatively to the outer margin of the box the point of 'unctures of the

extensions

14 and 15 with

t e end panels

8 and 9 are s aced inwardly from the end mar ms of tgepanels, as particularly shown in ig. 3.

I claim:

' 1. In a switch-box, an end wall, a side wall, an extension projecting from said end wall overlying the side wall and spaced out-turned flanges on said extension projecting substantially at right angles from the side wall forming a lath-receiving member, said extension being formed with an end tongue and said side wall being formed with an opening to receive said tongue.

2. In a switch-box, an end wall, a side wall, an extension projecting from said end wall overlying the side wall and spaced out-turned flanges on said extension projecting substantially at right angles from the side wall formin a lath-receiving member, and means or connecting the end portion of said extension to said side wall. 3. In a switch-box having a bottom wall, side walls and end walls; said walls bein Y formed of sheet metal; extensions former on the side margins of each of said end walls projecting over the outer face of one of the side walls having end tongues engaging said side walls, and a pair of spaced parallel flanges formed on each of said extensions and projecting outwardly from the outer face of said side walls with the flanges on one of said extensions arranged in alignment with the flanges on the other extension.

In testimony whereof, I have afiixed my signature.

CHARLES D. CONVERSE.