US980742A - Adjustable drop-light attachment. - Google Patents

Description

F. K. BARTHOLOMEW.

ADJUSTABLE DROP LIGHT ATTACHMENT.

APPLICATION FILED MAR. 15, 1910.

Patented Jan. 3, 1911.

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ATEN ti r OF CAMPBELL, CALIFORNIA.

ADJUSTABLE DROF-LIGHT ATTACHMENT.

Specification of Application filed March 15 To all whom it may concern:

Be it known that I. FLEI'RY K. BARTIXOLO- new. citizen of the United States, residing at Campbell. in the county of Santa Clara and State of California, have invented new and useful improvements in Adjustable Drop-Light Attachments, of which the following is a specification.

This invention relates to a drop-light at taclnneut for ordinary'cl'iandeliers and gas fixtures and the like.

The object. of this invention to provide a simple. cheap and practical drop-light attachment for fixtures and chandeliers, by means of which the light may be adjusted to various positions.

A further object is to provide a drop-light attachment. which can be applied to any vertical support, and which will be suiticiently rigid to sustain the suspended parts and retain them securely in position.

The invention consists of the parts and the construction and combination of parts as hereinafter more fully described and claimed. havingv reference to the accompanying drawings. in which- Figure' 1 is an el'evational view showing the invention as applied. Fig. 2 is an enlarged detailed view of the invention, with parts broken away. Fig. 3 is a cross-section on the line XX, Fig. 2.

In the drawings. A represents an ordinary gas chandelier or pendant suspended from vention is designed to be attached.

The invention residesin a bifurcated compound clamp which is substantiallvot' Y- shape. with the stem of the Y adapted to grasp the pipe A of the fixt.nre, and the arms ot' the Y having clamp members to adjust ahlv grip the drop pipe at. As here shown, this Y-elamp comprises a pair of fiat plates 2-3 placed face to face and detachably secured together by means of wing-nuts and threaded spindles. as later described.

The terminations of the bifurcated or forked plates 23 are bowed orhoolt-slniped, so as to conform to the periphery of the drop gas pipe 4, these bowed terminations forming the jaws of oppositely disposed clamp members-5 G. arranged in axial line and through which the drop pipe t is adapted to slide; these clamps 56 being widely v separated so as to form a substantial fric Letters ent- Patented Jan a, tan.

, 1910. Serial 110.549.506.

The jaws of the clamps 5-6 are adj listed so as to frictionally grip the. pipe by means of threaded studs 7'8 secured to the plate 2 andpassing through perforations in the plate 3 and having Wing-nuts 9-40 screwed on the out 1' ends thereof. These studs .7-8 'and wing-1 uts 9-'-1O are disposed adjacent to the clamps 5-6 respectively, in such manner that when the nuts 91O are tightened on the studs 78, the terminations of the friction-ally grip the pipe 4 in the jaws of the clamps 56. A packing ring 10* of felt, rubber or other suitable material may be interposed between the jaws of the clamps 5.-6 and the pipe 4, so as to form a. cushion or soft contact at this point to prevent marring of the finished surface of the pipe at as the latter slides up and down in the grips 56.

The plates 23 are extended at right angles to the juncture of the bifurcated portions and midway between the clamps 56, as at 111l, Fig. 3; this part 1111 forming the stem of the Y. The extended portion 11 of the plate 2 is bowed outwardly plates 23 will be drawn together so as to to form a rigid jaw- 12 of a clamp; and the portion 11 of the plate 3 is terminated at the inner edge of the jaw 12, as shown in Fig. 3. An adjustable clamp -jaw 13 is hinged at 14to the outer end of the jaw 12, and is adapted to coact with the jaw '12 so as to grip the pendent pipe A which passes between the jaws 1213. The free end of the jaw, 13 is slotted at'15 to pass over a threaded stud 16. This stud 16 is mounted on the plate 2 and extends through a perforation in the plate A wing-nut 17 is adapted to be screwed on the stud 16 so as to clamp the pipe A securely between the jaws 12 13. A packing ring 18 may be inserted between the jaws 12-13 and the pipe A. so as not to mar the latter.

- To apply this invention. the pair of plates 2-3 are separated sufliciently, by loosening the nuts 9lO 17 on their respective studs 7- -S-16. to permit of the clamps 5-6 being placed over the pipe 4 which carries a drop-light burner 4' at its lower end; and the hinge jaw 13 is opened by removing the nut 17. so as to permit of the jaw .12 being placed against the pipe A. whereupon the jaw 13 is closed upon the pipe A and clamped thereon by screwing the nut 17 on tion support for the pipe the stud l6. as before described. By loosening the nut 1'2 theattachrnent may be moved to any desired position on the pendant A and clamped thereon.

The drop gas pipe at is suitably connected. "with the gas supply, as by means of the flexible tubing 19, as shown in Fig. 1 By this attachment the elevation of the drop-light can be changed at Will by simply sliding the pipe 4: up or down in its grips 5-6.

The. lates 23 are reinforced by means oi ribs or Webs 26 so as to stifien the plates and prevent buckling or twisting, thuspen mitting of the use of thinner plates than could otherwise be used.

The importance of making the clamp attachment Y-shaped is to afford, first, a neat mode ot'attachment to the fixture, and second to provide a neat, simple and substantial means for frictionally supporting the drop pipe gripping it at two co1nparatively-Widely separated points, as by the clamp members 56.

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

1. A substantially ii-shaped clamp memher, the stem portion otthe Y having means for clamping it to a fixture, said means including a stationary jaw member and a 1nemher hinged thereto, and the branches of the if spread and formed of a pair of plates and terminating in a pair ofclamping mem bers Whose axes are substantially in line.

2. A substantially rshaped clamp memher, the stem portion of the Y having means for clamping it to a fixture, said means in eluding a stationary jaw member and a member hinged thereto, and the branches of the t spread and formed of a pair of plates which terminate in a pair ot'clamping members Whose axes are substantially in line,

said i clamp split centrally in the plane of its clamping means, and screw devices for holding the parts together and manipulating the clamping menibers.

In testimony whereof I have hereunto set my hand in the presence of two subscribing Witnesses.

FLEURY K. BARTHOLOMEVV. vVitnesses ROY ARCHIBALD,

HARLOW M. PLIMPTON.

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