US885836A - Insulated canopy-collar. - Google Patents

Description

PATENTED APR. 28, 1908.1

T. H. BULLOCK, JR. INSULATED CANOPY COLLAR.

APPLICATION FILED AUG. 24, 190 6.

ivil memes UNITED STATES PATENT OFFICE.

THOMAS H. BULLOCK, JR, OF NEW YORK, N. Y., ASSIGNOR TO JOHN DALE, OF

' NEW YORK, N. Y.

INSULATED CANOPY-COLLAR.

Specification of Letters Patent.

Patented April 28, 1908.

To all whom it may-concem:

Be it known that I, THOMAS H. BULLOCK, Jr., a citizen of the United States, residing at the city of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Insulated Canopy-Collars, of which the following is a full, clear, and exact description.

My invention relates to electric fixtures, the same residing particularly in a novel construction of canopy collar adapted to secure the canopy to the usual metallic tubing of the fixture and to insulate the same there from. v

The invention consists of a canopy collar comprising a ring and a cap, having screwthreaded connections with each other and formin the two parts of a clamp, and a contractibTe insulatingsleeve contained within said collar and cap, adapted to embrace the metallic tubing of the "fixture and to be forced into frictional contact therewith by said clamp.

The invention also consists in certain features and details of construction'w'hich will be hereinafter more fully described and claimed.

In the drawing forming part of this specification: Figure 1 is a face view of a canopy showing the application of my invention thereto, the fixture tubing being shown in section; Fig. 2 is a central sectional view through the canopy and collar Figs. 3 and 4 are detail, views of the screw-threaded ring forming part of the collar, and Fig. 5 is a detail view of the contractible insulating sleeve.

The canopy land the metallic tubing 2 of the fixture may be of any suitable or usual construction. A v

My improved canopy collar consists of a ring 3, preferably of metal, a metallic cap l an a c he ontractible insulating sleeve 5. ring 3 has been shown as extending through the usual opeing in the contracted portion of the canopy and is provided with anfupwardly extending flange 6, said flange being pro- I vided for the purpose of facilitating the con nectionnof the ring 3,-w'iththe'cano yrw'lhe said ring has beenshown at7 as so dered to -the canopy 1, but of course it may be connected therewith in any other suitable way. The ring 3 has also been shown as provided with an inwardly extending flange 8, and with external screw threads 9. The cap 4 is provided with internal screw threads corresponding to the threads 9 on the ring 3 and adapted to mesh therewith. The outer end of the cap 4 is formed with an inwardly extending, referably'beveled, ledge or flange 10. Wit in the clamp formed by the ring 3 and the cap 4 is located. the contractible insulating sleeve 5. This has been shown as made in two semi-cylindrical, separated halves, the inner bore of which is adapted to receive the metallic tubing" 2 of the fixture.

The inner end of the insulating sleeve 5 is slightly reduced in diameter sothat it extends rearwardly through the opening in the flange 8 of the ring 3 and forms a shoulder 11 which bears against said flan e. This engagement of the shoulder 1.1 with the flange 8 is designed for the purpose of preventing the bodily movement of the sleeve 5 toward the wall. The outer surfaceof the sleeve 5 is formed with an inclined or beveled wall 12 which is ada ted to be engaged by the inner edge of the ange 10 on the cap 4.

In 0 eration, the cane y 1 is placed over the tu ing 2 in the usua manner with the two parts of the contractible sleeve 5 separated so as to ,permit the free movement of the canopy on the tubing 2, and with the cap 4 either entirely disconnected from the ring 3 or moved on said ring to its outermost position. The canopy is now moved on the tubing 2 until the inner edge thereof fits snugly against the wall. The cap 4 is then screwed u onto the ring 3 with the result that the. ange lO thereof bears against the inclined wall 12 of the insulating sleeve 5 and contracts said sleeve to force the two'members thereof into frictional engagement with the tubing 2. The canopy 1 is thus locked in. place upon the tubing 2 and is efiectually insulated therefrom by the sleeve 5. No protruding screws orother exposed securing devices are employed as is common with the. canopy collars now in use, and, when finally applied, the vcanop is much more securely sustained than by t e use of the usual screws referred to, by reason'of the fact that a broad 'ande ensive insulating surface is obtained between the sleeve 5 and the tubing 2. It will be evident thath'as the cap 4 is being screwedup onto the ring 3, it is im ossible for p the sleeve 5 to bemoved therewit as longitudinal movement of said sleeve independently of the ring.3 is prevented bythe engagement of the shoulder 1 I with the flange 8.

It will be apparent from the foregoing description that my improved canopy collar may be used in connection with any of the usual forms of canopy and that the ring 3 may be secured to the canopy in any desired manner. In fact it is not necessary that the connection between the ring 3 and the canopy 1 be a permanent one, the only essential being that the sleeve 5 be held in frictional engagement with the tubing 2.

Having described my invention, I claim 1. In a cano y collar, a split sleeve of insulating materia adapted to be applied to a tubing and having an inclined or beveled surface, a two-part clamp embracing said sleeve and of greater interior diameter than the bore of the sleeve, one of the parts of said clamp preventing the independent longitudinal movement of said sleeve, and the other acting upon said inclined surface for forcing the sleeve into frictional engagement with the tubing, and a canopy carried by said clamp.

2. In a canop collar, a split sleeve of insulating materia adapted to be applied to a In witness whereof, I subscribe my signature, in the gresence of two witnesses.

' HOMAS H. BULLOCK, JR.

Witnesses:

H. S. SALT, E. E. BAYNORE.

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