US1172229A - Electric fixture. - Google Patents

Description

J. G. TURNBULL ELECTRIC FIXTURE.

APPLICAHON FILED SEP[. 12. I934 1 172 229 Patented Feb. 15, 1916.

5 SHEETS SHEET L I. G. TURNBULL.

ELECTRIC FixTURE.

mwucmon mm saw. :2. :914

1,172,229.. Patented Feb 19w.

5 SHEETS SHEE'I' 2 l. G. HJ'RNBULL. ELECTRH) HXTURE APPLICAHON FILED SEPT. 12. mm,

ljaten'ted Feb. 15, 1916.

5 SHEETS--SHEET 3.

.l. G. TURNBULL.

ELECTRIC FIXTURE.

APPLICATION FILED SEPT. 12. l9l4.

Patented Feb. 15, 1916.

5 SHEETS-SHEET 5 UNITED STATES JOSEPH GEORGE TURNBULL, OF NEW PATENT OFFICE.

YORK, N. Y., ASSIGNOR T0 TURNBULL ENGINEERING COMPANY, INC., A CORPORATION OF NEW YORK..

ELECTRIC FIXTURE.

Specification of Letters Patent.

Application filed September 12, 1914. Serial No. 861,374.

To all whom it may concern:

Be it known that I, JOSEPH Gnonon TURN- BULL, a citizen of the United States, residing in New York city, in the county of Bronx, State of New York, have invented certain new and useful Improvements in Electric Fixtures;

My invention relates more particularly to thatv class of electric fixtures which are known as outlet blocks or base blocks and the ground plate therefor.

The objects of my invention are to provide an outlet block which is easily, cheaply and simply made and constructed and which permits of its use and adaption in an economical and ready manner to more forms and uses than those today known, furthermore to;

made to the drawings in which like letters of reference indicate corresponding parts.

In-the drawings, Figure 1 is a plan view of the outlet block Fig. 2 is a section along lines 2-201 Fig. 1, and Fig. 3 is a section.

along lines.3--3 of Fig. 1. Fig. 4 is a plan view of the supporting or ground plate. Fig. 5 is a section on lines-55 of 4. Fig. 6- is a section of the clamping .nipple, and Fig. 7 is a section of the lock-nuttherefor. Fig. 8 shows in section the application of the ground plate and outlet block toa combination gas and electric fixture. Fig. 9 is a section view of the metal molding, and Fig. 10 is anend view thereof. Fig. 11 is a sectional view of the outlet block and ground plate applied to a straight electric outlet box. Fig. 12 shows an application of the outlet block when applied to a tap for a' drop or portable light. Fig. 13 is a plan view of the base block, and Fig. 14 is a sectional "i e w' of the base block in use.

. In the. drawings A is the outlet. block which may be ma de of porcelain, fiber, glass,

metal, glazed metal, or any non-conducting Patented Feb. 15,- 1916.

or glazed metal alloy of any shape desired.

Preferably the shape is in ponformity with.

that of the canopy to whi i'it may be attached. I have shown it circular only as a matter of convenience. Y

In Figs. 1 and 2, B are channels through whichthe cables are inserted, the cables being preferably protected by metal molding.

It is believed the use of metal molding, such as is commonly known as the hational metal molding, is quite well known in the art, but for the sake of clearnessv I have shown in Fig. 9 a sectional view, and in Fig- 10 an end view of such molding, B desig' nating the upper and B the lowerstrips;

The cables may be inserted through the channels B and out through the center opening C of the block. A, or vice versa. 'Ghannels B-have inwardly sloping bottom portions D, and the inner corners arev rounded so as to permit of themore ready insertion of the cables. .When the strips of metal molding are inserted in the channels, the edge of lower strip Bf, comes in contact with the edge E whichacts as a stop, the upper strip B .comes in contact with-the edge F which similarly act as a stop and. a consequent tight fit between the upper and lower strip is obtained. The stops Ev andF, by

insuring a tight fit between the strips of metal molding, obviate the use of -.a bushing and permit of a smooth surface through.

which the cables are run.

Vw hen it is desired to attach the ground plate M directly to the ceiling or wherever else it is to be attached, the same is access.

plished by use of screws inserted through the assages G. These passages Gare par- I ticu arly designed to permitof greater leeway in finding a purchase for. the screws H;

when they are inserted therethroughv as Will appear hereafter. In Fig. 3;it will be noted that these passages are shown to taper inwardly toward the lower portion of the block, thereby permitting of the movement of the screw point in an area equal to that of the area of passage G at that end of the block and so permitting of the greater possibility of the screw finding a suitablepurchase somewhere within that area, .the screws, of course, being inserted at any angle to the vertical without shifting the block.

The plate M may be called a ground plate 7 I the screw point to find a purchase.

, combination fixture.

The amount of space provided for finding a purchase for the screw H as shown for instance in Fig. 12 depends only on the amount of taper oi the sides of passage G;

the heads of the screw H being countersunk at J, in orderto prohibit any grounding on the canopy, Fig. 8. I

The exterior sides K of the channels B are ordinarily closed, but these closed portions are adapted to be readily and easily'knocked out and the cable inserted through one or more channels as desired.

When it is desired to fit a crowfoot, or similar form of fixture, to the outlet block, the same is fastened to block A by means of suitable bolts and nuts H inserted through holes L, located in the channels B. The heads of said nuts are countersunk so as to give free slot movement and prohibit the possibility of any scraping along the channels B.

The ground plate M, shown in Fig. 4, is used particularly when it is desired to make connections to a concealed outlet box or when the block is used with a straight or Inthis instance 'the plate M is secured to thegas pipe M, Fig. 8, which passes through the outlet box as is usual. x

The nipple N, employed to attach the ground plate, (Fig. 6) is threaded on its exterior side and is slotted at suitable places as at 0, so as to allow contraction for binding,

and tapered so that when the lock-nut P is screwed thereon the inner side of the nipple will bind upon whatever itcircumscribes. Ground plate M, when .in/use, is held between the head N of the nipple and the lock-nut P, as showni'i Fig. 8, and the outlet block is attached to the ground plate by screws inserted throughthe passages G into suitable screw-threaded openings Q, in the ground plate. One of the advantages of the passages G is thus readily seen from the convenience with which the screws H ma be inserted therethrough and up through the holes Q, of plate M.

Near the edge of the late M are punched up portions R,-throug the upper strip B of the metal molding until it hits the turned up portion which acts as a stop therefor. The sides of the upper strip B are cut away as also shown in Fig; 9 so that only the top piece of the strip is forced beneath the punched up portions R in the plate M and lie on top of the latter against the turned n edge of the openings T. The positipn'o the strips B and B which is inserted in Fig. 9 corresponds to the-positionsof the and spliced as desired. These splices may be in the outlet box S, concealed in the plaster W, or below it, as shown in Fig. 8. lVhen it is desired to use the block in connection with a straight electric outlet box,

the ground plate M is secured between the in connection With a tap for a drop. or portable light, no ground plate is needed, as is also-the case in exposed wiring, and the rosette cap V is suitably secured to the block A by the bolts and nuts in the passages L, and the block itself is attached to the plaster or rafter W by means of the wood screws H. As shown inFig. 12, the screws H are in an inclined position, as heretofore described. In Fig. 1.2 I have shown in dotted lines the well known arrangement, in arosette cap, by which any strain or pull on the portable light is not transmitted to the cables above.

,When, it is desired touse'theblock as a base block, itis preferably made smaller. In such an arrangement, the block A has chan nels b which, however, areconstructed to connect with. channels a which run through the block; of course, a single central channel, as in Fig. 1, may be employed, but in this instance I prefer the construction shown in Fig. 14. The upper strip B of metal molding abuts against a stop f and the lower strip B against a stop e wheninserted, and

should it bedesired to carry the cables through two ormore channels the pieces K areaccordingly knocked out.. The block is fastened to the wall W" by means of suitable Wood screws H, and switches or other devices are attached to the block by means of screws H in the hole 2 in Figcl3.

From the foregoing description taken in connection with the drawings, the-operation of my invention will be radily understood and the advantages in obviating the use of a large number of small parts, such as single clamp bushings, set screws in the base plate, in the clamp bushings and in the case cover,

insulation of canopy, insulating joint,

bodiments of my invention, what I claim and desire to protect by Letters Patent is:-

1. In a li hting fixture, the combination of an outlet lock, cable and molding therefor, said outlet block comprisin channel portions through which the cable is readily insertible, groves in said channel portions adapted to act as stops to the cable molding, closig means for each channel which are adap I to be easily knocked out so as to permit the use of one or more channels and means for permitting the ready attachment gf sacid block as desired without shifting the 2. In a lighting fixture, an outlet block comprising channel portions having downwardly sloping bottoms, groves in said channel portions, closing means for each channel portion adapted to be readily knocked out, tapered holes and screws adapted to be in serted in said holes, the tapered holes permitting of the insertion of the screws in numerous positions so that the block may be attached as desired without shifting.

3. In a lighting fixture, the combination of an outlet block, cable and cable molding, a ground plate therefor comprising bent up portions for holding strips of the said molding, turned-up portions adapted to act as stops for said strips of molding, openings for running the cable through the plate and means for readily attaching said plate to said block.

4. A lighting fixture, of the class deand box, means for fastening said plate to said box comprising a nipple having an externally tapered threaded slotted body portion, means attached to said box to which said nipple may be attached and a lock-nut for said nipple.

5. A lighting fixture, of the class described, comprising in combination a cable, cable moldings, an outlet block, a ground plate therefor and an outlet box, means for attaching said outlet box to said ground plate, said ground plate having a turned-up portion adapted to act as a stop to strips of said molding, said outlet block having groves to act as stops to the other strips of said molding and said plate having a punched up portion adapted to have inserted therethrough strips of said molding, channels in said outlet block and openings in said ground plate for running the cable through threaded screw holes in said ground plate and means for readily attaching said outlet block to said ground plate through said threaded screw holes.

In testimony thereof, I have signed this specification in the presence of two subscribing witnesses.

JOSEPH GEORGE TURNBULL.

\Vitnesses:

SELMA HIRTENSTEIN, Josrrn L. YOUNG.

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