US533434A - buffinton - Google Patents

Description

(No Model.)

B. W. BUPI'INTON. ROSETTE FOR ELECTRIC LIGHTING.

No. 533,434 Patented Feb 5, 1895.-

NEEEEE moved by the screw as it is turned up.

Mirna STATES Z. ATENT OFFICEQ ONE-HALF TO ALBERT F.

ROSETTE'FOR ELE DOW, OF SAME PLACE.

CTRIC LIGHTING.

SPECIFICATION forming part of Letters Patent No. 533,434, dated February 5, 1895.

Application filed October 6. 1894:,

To aZZ whom it may concern.-

Be itknown that I, ELISHA W. BUFFINTON, a citizen of the United States, residing at Fall River, in the county of Bristol and State of Massachusetts, have invented new and useful Improvements in Rosettes for Electric Lighting, of which the following is a specification.

This invention relates to rosettes or cutouts, (usually made of porcelain,) especially to that class which are intended to be secured to the ceiling of a room, where electric lights, more particularly incandescent lamps, are employed, and the invention relates to the novel construction and arrangement of parts hereinafter described whereby the lamp-cord is held and secured without the use of screws, whereby the fastening screws are protected from forming electrical connections with the lamp-cord, and whereby the Wiresare secured without danger of being slackened by being The nature of the invention, in detail is fully described below and illustrated in the accompanying drawings, in which- Figure 1 is a plan view of the under side of my improved rosette. Fig. 2 is a central vertical section of the same, taken on line on, Fig. 1. Fig. 3 is a perspective view of a clamp detached.

Similar letters of reference indicate corresponding parts.

A represents the walls, and A the central or main portion of a porcelain cup, said walls being provided with opposite grooves or passages a. for the clamps, and said central portion being provided with a central vertical passage a for the lamp-cord, which extends down to and supports the incandescent lamp.

B B represent the clamps secured to the rosette by means of the screws I). These clamps are located as usual in the passages 11 and are provided near their outer ends with binding screws 0 adapted to hold the electric wires D, which are naked at that point. The upper surface of each clamp is provided near its outer end with a groove E (see Fig. 3) said groove being formed with numerous serrations E extending transversely across "it. The wire I) is held down against the serra- Serial No. 525,066. (No model.)

tions in said groove by the head ofthe clamping screw O, and thus the wire is prevented from being moved by the screw as the latter is being turned, and hence from slackening.

The under surface of the rear end of each clamp B is provided with a protuberance E, and the upper side of the body A of the rosette is provided with a corresponding depression or concavity H, and the naked ends I of the lamp-cord I are held tightly between said protuberances F and depressions H, being pressed down into the latter, by means of the fastening screws 1). Thus it will be seen that a single screw, namely the fastening screw, not only holds the clamp in position but holds the ends of the lamp-cord in electrical contact, the ordinary contact screws being entirely done away with.

K represents the screws which extend through the perforations L up into the ceiling and hold the rosette in place. It is found in practice that an electrical connection is often formed, especially, in case of the existence of moisture, between the lamp wire and the screws K. In order to prevent this I provide protecting walls P which extend from the inner side of the walls A and up from the upper surface of the portion A, filling the space between said portion A and the ceiling and surrounding the screws K.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In a rosette of the character described, in combination, the cup comprising the central or main portion A and oppositely grooved walls A, the clamps B each secured at a point between its ends to said main portion within a groove by asingle screw 12, the outer ends of said clamps being grooved atE, binding screws (3 in said clamps having their heads overlap said grooves E whereby the electric wire is held therein, the lamp cord clamped between the inner ends of said clamps and the main portion of said rosette, substantially as described.

2. In a rosette of the character described, in combination, the cup comprising the central or main ortion A and o positel rooved P P- y s walls A, the clamps B each secured at a point between its ends to said main portion by a on the upper surface of the main portion of single screw 1), the outer ends of said clamps the rosette, substantially as set forth. being grooved at E, binding screws 0 whose heads overlap said grooves whereby the elec- ELISHA BUF F1 N1 5 tric wire is held therein, and the lamp cord Witnesses:

clamped between the protuberances F on the L. ELMER 'WOOD,

inner ends of said clamps and the recesses H FRED W. BUFFINTON.

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