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Publication numberUS2029716 A
Publication typeGrant
Publication dateFeb 4, 1936
Filing dateJun 1, 1933
Priority dateJun 1, 1933
Publication numberUS 2029716 A, US 2029716A, US-A-2029716, US2029716 A, US2029716A
InventorsHartmann Povl D
Original AssigneeBeaver Mfg Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electric fitting
US 2029716 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

Feb. 4, 1936 P. D. HARTMANN 2 ,0 9,7 6

ELECTRIC FITTING Filed June 1, 1953 V INVENTOR 1%! fl fl arz mmzn bis ATTORNEYS the fittings.

Patented Feb. 4, 1936 UNITED STATES PATENT OFFICE ELECTRIC FITTING Application June 1, 1933, Serial No. 673,806

5 Claims.

This invention relates to improvements in electric fittings and more particularly to improvements in electric fittings of the type commonly employed in wall outlet boxes.

Heretofore when it has been found desirable to provide more than one fitting in a single outlet box, it has been necessary to make use of a specially manufactured unitary structure to be located in the box. In some instances, it is desirable to have a combination of fittings, such as for examplega'receptacle' for a plug and switch combined in the same box. In other instances it may be desirable to have two receptacles for plugs combined in the same box. In still other cases it may be desirable to combine a fitting of the character known as a bulls eye, with another fitting of different character in the same outlet box. Such combinations of fittings havebeen supplied to the user in the finished unit form for installation with the result that the combination could not be changed without substituting an entirely different unit.

An object of the present invention is to provide a retaining member for electric fittings of such character that fittings of different types can be secured thereto or removed therefrom at will.

Another object of the invention is to provide a retaining member for electric fittings of such character that various combinations of fittings can be secured thereto.

A further object of the invention is to provide a retaining member of the character set forth so constructed that the fittings secured thereto will be arranged to register with the openings of an ordinary duplex flush receptacle plate.

In the present invention use is made of a metallic strap of such size and shape as to be capable 'of being secured in an ordinary duplex outlet box. The strap is provided with a pair of openings therein of such size as to receive fit-- tings of different types, the" bodies of which are preferably made up of some molded insulating material; The wall of each opening near the ends of the strap are provided with offset portions which serve to engage shoulders on the bodies of The openings in the strap are of slightly greater length than the length of part of thefittings so that such part of each fitting can be passed through an opening and then moved longitudinally an amount sufficient to permit engagement of one of the shoulders on the fitting with the ofiset part of one of the strap-opening walls. When a pair of fittings have been introduced in the two openings, it will be seen that one end of each fitting will beheld in engagement with the offset parts of the strap while the other ends of the fittings would be free for movement. To prevent such movement, use is made of a plate which is positioned substantially centrally of the strap and which engages shoulders on the fittings opposite to those previously engaged by the offset parts of the strap. This plate has a central threaded aperture which can be moved into register with an unthreaded aperture in the central part of the strap, the threaded aperture in the plate serving to receive the customary screw with which a duplex flush receptacle plate is secured to the strap. The two fittings will be of such configuration in their exposed parts as to fit within the usual openings provided in such duplex flush receptacle plate. 7

The fittings can be of any desired character, that is, they may be receptacles for electric plugs; switches; the so-called bulls-eyes; orfittings of any other character, the only requirement being that the bodies of the fittings be of substantially uniform size and configuration regardless of the type of the fitting. With these requirements met,

. it will be seen that any desired combination of fittings can be assembled for mounting in a single outlet box. Furthermore, with this type of strap the combination of fittings can be made up at the time of installation, thereby reducing the number of unitary assemblies that the user would ordinarily have to provide.

Other features and advantages of the invention -will become apparent by reference to the following detail description read in the light of the accompanying drawing, wherein Fig. 1 is a plan view of a strap of the present invention with a pair of electric fittings secured thereto.

Fig. '2 is a section taken substantially on the line 2-2 of Fig. 1, and indicating in dotted lines the manner in which a fitting can be installed in the strap.

Fig. 3 is aplan view of the strap of the invention.

Fig. 4 is an end view of one of the fittings used in the practice of the invention; and

Fig. 5 is a perspective view of the locking plate employed in the invention.

Referring now to the drawing, l0 indicates generally a metallic strap of such size and shape as to be capable of being secured in an outlet box of conventional character. This strap is provided with the customary openings I l in the ends thereof, through which screws may pass to fasten the strap in the box. The strap is provided intermediate the ends with a wid p t and this wide portion has a pair of openings I2 therein. The wall of each opening l2 adjacent the end of the strap is provided with an offset portion l4 depressed an amount sufficient to cause the top of the part M to be in substantial alignment with the bottom of the rest of the strap.

The adjacent walls of the openings are provided with cutaway parts l5, the purpose of which will be explained hereinafter. The central web of the strap is provided with an unthreaded aperture l6.

In conjunction with a strap of the character just described, use may be made of a pair of electric fittings of any desired type. These fittings which are indicated at 20 and 2| in Fig. 1,-

are respectively a receptacle for a plug and a switch. Other types of fittings of course can be employed. Each fitting, regardless of the type, will be of the same general exterior construction, having a top part 22 in the nature of a 'fiange so shaped as to correspond to the shape of the openings in a duplex flush receptacle plate of conventional character. Inasmuch as such plate does not form any part of the present invention, it is not illustrated herein. Extending downwardly from the upper part 22 is a body part 24, within which can be mounted contacts, etc. The fitting may be made of two parts if desired and clamped together in any suitable fashion. These parts are preferably molded from some suitable insulating material.

Extending from opposite edges of the fitting and below the part 22 are flanges 25. The overall dimension of the fitting from one edge of a flange 25 to the other edge thereof is slightly greater than the length of the apertures from one end wall to the other thereof. The flanges, however, are of width substantially corresponding to the extent across the strap of the offset part [4 and the cutaway part l5.

The remaining element in the combination consists of a fiat metallic plate 30, the length of which is approximately equal to the width of the strap. This plate 30 is wider however than the central web 3| of the strap. The plate is provided with a .central aperture 32 which is threaded if desired. 'The area immediately surrounding theaperture may be made of increased thickness to provide walls of increased depth.

The threaded aperture 32 is of such size that a bolt engaged therewith may pass freely into opening IS in the web of the strap.

When it is desired to assemble a combination of fittings in conjunction with the strap ll] of the invention, a fitting is moved into position shown in dotted lines in Fig. 2 (the plate 30 being moved out of obstructing position). The fitting can then be moved downwardly through the aperture and then shifted slightly toward the end of the strap until one shoulder 25 is engaged by an offset portion l4. During the assembly, one shoulder 25 passes through the cutaway part l5,'thereby permitting the fitting to be introduced as shown, such cutaway part l being necessary due to differences in dimensions of the fitting and the strap opening. Another fitting of the same type, or of different type, may then be introduced in the other strap opening and moved to cause one of its shoulders 25 to engage the other ofiset part I4 of the strap. In this position the bottom edges of the parts 22 V of the fitting rest on the side edges of the strap with the circular part of the fittings slightly overhanging the side edge of the strap.

The two fittings can then be locked in place by sliding a plate 3!] into position to fit over the adjacent shoulders 25 of the two fittings. When the strap and fittings have been thus assembled, the electric conductors can be attached to the fittings and then the assembly secured in the box in the usual fashion. Once positioned in the box and with a duplex flush receptacle plate positioned thereover, the fittings are locked against movement due to the fact that the screw which attaches the receptacle plate to the assembly engages the threaded aperture 32 of the plate 30.

From the foregoing it will be seen that the present invention provides an arrangement whereby any desired combination of electric fittings can be assembled for installation in a single outlet box. Furthermore, the invention is of such character that the fittings are interchangeable at will, so that various conditions and requirements can be readily met. An advantage in the invention resides in the fact that when installing fittings, the installer can be provided with a collection of various types of fittings and can assemble these fittings into the desired combinations on the job. This ready assembly eliminates the necessity for providing the installer with aconsiderable number of various permanent assemblies as has been customary in the art heretofore. Moreover, if conditions at any time change, the combination can be likewise changed by merely reversing the order of assembly and then reassembling any suitable combination of fittings.

It will be apparent from the foregoing that the invention is capable of considerable modification, in View of which it is to be understood that the illustrated embodiments are not shown for purpose of limiting the invention, but are shown only as illustrative of the preferred form. The invention therefore is to be limited only by the scope of the following claims.

I claim:

1. The combination of a metallic strap having an opening therein, an electric fitting casing having external stop members adjacent the top thereof and having external shoulders below said stops, said casing being passed through said opening until said stops contact with the top of the strap, one of said shoulders engaging under the bottom of said strap when said casing is shifted laterally in the opening, and a plate secured beneath said strap in position to decrease the size of said opening and to engage over another of said shoulders on said casing, whereby said casing is substantially locked against movement in the opening.

2. The combination of a metallic strap having a plurality of openings therein, a plurality of electric fitting casings having external stop members adjacent the tops thereof and having external shoulders below said stops, said casings being passed through said openings until said stops contact with the top of the strap, one of said shoulders on each casing engaging under the bottom of said strap when said casings are shifted laterally in the openings, and a plate secured beneath said strap in position to decrease the sizes of said openings and to engage over another of the said shoulders on each of said casings whereby said casings are substantially locked against movement in the openings.

3. The combination of a metallic strap having a plurality of openings therein separated by a web, a plurality of electric fitting casin s having external stop members adjacent the tops thereof and having external shoulders below said stops, said casings being passed through said openings until said stops contact with the top of the strap, one of said shoulders on each casing engaging under the bottom, of said strap when said casings are shifted laterally in the opening, and a plate secured beneath said web, said plate being of such width as to decrease the size of said openings and to engage over another of the said shoulders on each of said casings to prevent Withdrawal of the casings from the openings.

4. The combination of a metallic strap having a plurality of substantially rectangular-shaped openings therein separated by a web, a plurality of electric fitting casings having external stop members adjacent the tops thereof and having oppositely disposed external shoulders below said stops, said casings being passed through said openings until said stops contact with the top of the strap, one of said shoulders on each of said casings engaging under the bottom of said strap when said casings are shifted toward the ends of the strap; and a plate secured beneath said web in position to decrease the size of said openings and to engage over another of the said shoulders on each of said casings to lock said casings to said strap.

5. The combination of a metallic strap having a plurality of substantially rectangular-shaped openings therein, a part of the end wall of each of said openings adjacent the respective ends of the strap being depressed, a plurality of electric fitting casings having external stop members adjacent the tops thereof and having oppositely disposed external shoulders below said stops, said casings being passed through said openings until said stops contact with the top of the strap, one of said shoulders on each of said casings engaging under the bottom of said depressed parts of the end walls of the openings when said casings are shifted toward the ends of the strap, and a plate secured beneath said strap between said openings in position to decrease the size of said openings and to engage over another of the said shoulders on each of said casings to lock said casings to said strap.

POVL D. HARTMANN.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3432611 *Jun 30, 1966Mar 11, 1969Sierra Electric CorpElectrical device moduline
US4459736 *Apr 26, 1982Jul 17, 1984Judkins Milton WShim for electrical receptacle or switch
US7614889 *Nov 14, 2008Nov 10, 2009Premier Manufacturing Group, Inc.Utility receptacle apparatus for use with a work surface or similar article
Classifications
U.S. Classification439/538
International ClassificationH02G3/18
Cooperative ClassificationH02G3/18
European ClassificationH02G3/18