US 285963 A
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Description (OCR text may contain errors)
Patented Oct. 2, 1883.
llhvirnn ST TES PATENT @rricn.
JAMES BRANNEN, OF PHILADELPHIA, PENNSYLVANIA.
EPECIFICA'IIONforming part of Letters Patent No. 285,963, dated Cctober 2-, 1883. Application filed March 15, 1883. (No model.)
C 0 represent two metal bars,which are piw To all whom it may concern:
Be it known that I, JAMES BRANNEN, aciti- 1 zen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Sliding or Extension Chandeliers and Drop-Lights; and I do hereby declare the following to bea full, clear, and exact description of the invention, reference being had to the accompanying drawings,
which form part of this specification, in which- Figures 1 and 2 are side views. Fig. 3 is a cross-section, and'Fig. 4 is a modification.
My invention has relation to sliding drop-' lights, and has for its object the provision of means whereby the moving portion or harp may be readily and easily moved either up or down and caused to remain at any desired height, being retained in an adjusted position by friction on the sliding pipe, which friction is relieved, wholly or in part, when said harp is elevated or moved upwardly.
In Letters Patent granted to me dated July 1, 1873, No. 140,459, is shown and describeda device for supporting the sliding pipe of a drop- 1ight,consisting of a spring-actuated eccentric that pressed upon said pipe and held it in position, being caused to release its grasp by pulling a cord attached to the periphery of said eccentric, the harp being then raised or drawn down, as desired.
My present inventiomwhich is an improvement upon said patented invention, consists of means whereby a sliding pipe is sustained in position by grooved rollers which are pressed against the said pipe by springs attached to pivoted bars arranged in such manner that a downward movement of the pipe increases the pressure or tension of the springs and the friction of the rollers, while an upward movement of said pipe diminishes such pressure and friction.
Referring to the accompanying drawings, A represents the stationary pipe of a chandelier or other fixture, and B the extension'or droplight pipe, fitted and adapted to slide up and down in the same. The extension-pipe B is preferably square in cross-section, and is designed to support a harp or other like device at its lower end. To the lower end of the stationary pipe A is attached a rectangular frame or body, A, having the top a, bottom I), and sides 0 c.
otally attached to the top a of the frame A, having pins (2 at their lower extremities, to which are secured the ends of two spiral springs, e 6, one 011 each side of the extension pipe 13. The tendency of the springs c cis to draw the lower ends ofthe bars CC together, and the inward movement of said bars is limited by stops f f on the bottom I) of the frame.
D D represent friction-rollers having each a V-groove in their periphery, that press against and partly embrace the eXtension-pipeB. The
rollers D D are located between the extensionpipe B and the pivoted rods 0 G 011 either side, and are of such size that when they are at their highest point, as shown in Fig. 1, they will fit loosely in position, and will only lightly bear upon the extension-pipe. When, however, the pipe is drawn downward ,the rollers spread or move the rods 0 O outwardly against the influence of the springs c (a, and are pressed strongly against the extension-pipe by the tension or pressure of said springs. \Vhen the rollers meet the stops f f theirfurther rotation is thereby prevented or retarded while the pipe 13 is descending, thus increasing the friction upon said pipe.
In Fig. 4 I have shown a slight modification of my invention, wherein the bars 0 O are pressed inward by flat springs g g, secured to the sides 0 c of the frame, said flat springsbeing substituted for the spiral springs e c.
The operation of my invention is as follows: WVhen it is desired to lower the harp or droplight, it is drawn downwardlyby hand or otherwise. The friction of the pipe B upon the rollers D D causes them to revolve and descend until they come in contact with the stops ff, spreading the rods 0 O apart, thereby increasing the tension of the springs and causing said rollers to bear with increasing pressure on the pipe B. YVhen the rollers meet the stops ff,their revolution is thereby prevented or retarded. Any further downward draft upon the extension-pipe will cause the same to move upon the rollers with considerable friction, and said pipe will be retained by such friction at any desired place where the downward pull thereon is suspended. \Vhen the extension-pipe is raised,by pushing it upwardly, the rollers move to their. upward position, where the friction is slight, thus permitting the harp or drop-1i ght to be elevated with ease.
After raising the harp and letting go of it, its weight and that of the pipe causes it to drop slightly until the rollers meet the stops ff, in which position the friction is sufficient to sustain the pipe and its appendages. The square form of pipe is preferable, as in such case it passes through a hole of similar shape in the frame and keeps the harp or other fixture in a uniform position, and for the further reason that it affords a better grip to the friction-rollers.
\Vhile I have described the invention as being applied to a gas-fixture, it is equally applicable to a drop-light of any description, whether gas be used or not, and where it is not desired to use it inconnection with a gas-fixt'u re a soli (1- rod may be substitu ted for the pipe.
\Vhat I claim as my invention is as follows:
1. In an extensionchandelier, the combina;
oted bars 0 O, and the springs c ,0, connecting said pivoted bars together, substantially as described.
2. The combination,'with the stationary pipe A and frame A, attached thereto, of the pivoted bars 0, extensioirpipe B, rollers D D, and suitable springs for pressing said bars against the rollers, substantially as described.
In testimony that I claim the foregoing I have hereunto'set 'my hand this 9th day of March, 1883.
M. D. CoNNoLLY, J 0s. B. OoNNoLLY.