US1126074A - Suspension device for lamps. - Google Patents

Description

G. M. PITEL. SUSPENSION DEVIGE FOR LAMPS. APPLICATION FILED MAR.21, 1914.

1,126,074. Patented 5241.26, 1915.

THE NORRIS PETERS 60., PHOTO-LITHOY. WASHINGTON, D. C

CONRAD M. PITEL, OF MEBIDIEN, CONNECTICUT.

SUSPENSION DEVICE FOR LAMPS.

Specification of Letters Patent.

Patented Jan.26,1915.

Application filed March 21, 1914. Serial No. 826,415.

To all whom it may concern:

Be it known that I, CONRAD M. PITEL, a citizen of the United States, residingat Meriden, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Suspension Devices for Lamps; and I do hereby declare the following, when taken in connection with the accompanying drawings and the characters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this application, and represent, in-

Figure 1 a side view of a suspension device constructed in accordancewith my invention. Fig. 2 a front view of the same. Fig. 3 a plan view of one of the wedges, detached. Fig. 4 a top or plan view showing the engagement of the suspension device with the crowfoot. Fig. 5 a side view of the same.

This invention relates to an improved suspension device for lamps, and particularly that class in which a spring drum is employed on which a cord or cable is wound and from which the burners are suspended, and so as to be raised or lowered.

The object of this invention is a simple arrangement of suspension devices adapted to fixtures of various styles, and in which the tension of the spring-drum is regulated 1-:1 a large degree by the weight of the lamp.

A further object is to provide means for supporting the suspension devices so that the fixture will hang true; and the invention consists in the construction hereinafter described and particularly recited in the claims.

In carrying out my invention, I employ a spring drum 2 mounted on a horizontal shaft 3 which is supported in a frame 4 adapted to be connected to the upper end of a fixture pipe, not shown. The drum 2 is provided with flanges 5, 6. and between the flanges and the sides of the frame are bearing-plates 7 and 8. Between these bearingplates and the flanges are disks 9, 10 of paper, leather or other suitable material. The opposite ends of the shaft 3 are slotted to receive wedges 11 and 12 which are coupled with the shaft bv pins 13 and 14 passing through slots 15 in the wedges so that the wedges may have a certain amount of lateral play, thesewedges extending through vertical slots formed in the sides of the frame. The outer edges of these wedges are of cam shape. The slots in the shaft 3 also ceive levers 18, 19, which are pivotally connected with the frame at their lower ends and which are formed with slots 20, 21, at their upper ends for the clearance of rivets 22 and 23 by which the ends of the levers are movably connected with the lower ends of a yoke 24. This yoke is connected at its upper end with the shank 25 of a head26, and the yoke is formed with a clearance slot 27 for a nut 28 mounted on a screw threaded post 29 at the upper end of the frame 4. In the case of electric fixtures or fixtures for oil lamps, the suspension device instead of being connected with a gas pipe nipple, is frequently coupled with a crowfoot 30 which, as shown in Fig. 4 of the drawings,

-may consist of three arms adapted to be secured in place and formed with a notch 31 to clear the shank 25, and the head 26 will be provided with downwardly projecting prongs 32, 33, which straddle the arm 34 of the crowfoot and so that the device will be hung in the crowfoot and allowed to rock therein suiiiciently to allow the fixture to hang in a vertical position. The cord or cable 35 which is wound upon the drum. is connected in the usual manner with the movable portion of the fixture and is unwound from the drum as the fixture is pulled down in the usual manner. and rewound u on the drum when the fixture is raised. The weight of the fixture drawing down u on the frame 4. draws with it the levers 18 and 19, and these levers in turn bear a ainst the wedges 11 and 12 and crowd them against the disks 7 and 8 so as to create friction against the dances of the drum; and the heavier the fixture the greater the friction. and vice versa. the lighter the fixture. the less friction will be ap lied. To limit the extent of friction which may be applied. the nut 28 on the post 29 may be moved up or down so as to form a stop to limit the movement of the fixture. and it follows that the greater the weight of the fixture the more friction will be ap lied. as the pressure of the levers 18 and 19 on the wedges 11 and 12 will be increased or diminished by the weight of the fixture and limited in either direction by raising or lowering the nut. When the fix ture is raised the pressure upon the suspension device is released, so that all tension is removed from the spring drum which is allowed to move to wind the cord or cable thereon.

I claim 1. A suspension device comprisinga frame, a spring drum mounted'upon a shaft supported by; said frame, the ends of said shaft formed with slots, wedges passing through said slots, levers connected with the frame and bearing on said wedges, and a yoke connecting the upper ends of said le- W .i a

2- A suspension" device comprising a frame, a spring drum in the frame mounted upon a horizontal shaft, said shaft formed in its ends with slots, wedges. passing through said slots andbearin'g against-said drum, levers pivoted to opposite sides of the frame andeXtending through saidslots and resting upon said" Wedges, said levers formed at their upper ends with inclined slots, a-yoke'coupled' with the upper endsof said levers through said slots,an d means fo'r suspending said yoke. i

A suspension device; comprising a frame, a spring drum mounted in said frame upon a horizontal shaft, said shaft formed in oapositeends with slots, wedges extending hrough said slots and adapted to bear against said drum, said frame formed in its upper end with a threaded post, a nut on said post, levers connected with opposite sides of the frame and extending through the slots/iii tlieshaft and bearing upon said Wedges, a yoke connected with the upper ends of said levers, said yoke formed with a clearance slot for the nut onsaid post, and means for supporting said yoke;

l A suspension device comprising a frame, a spring drum mounted in said frame, a head adapted tosupport said frame, said head comprising a shank and formed at one side with two downwardly extending prongs adapted to engage with the arms of a crowfoot.

Thecomh'inationwith a suspension device having a suspending head including a shank and two downwardly projecting prongs at one side, of a Crowfoot formed with a clearance notch for such shank, whereby the said prongs may straddle one of the arms of the Crowfoot.

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

CONRAD M. PITEL.

Witnesses:

CLARA L. WEED, M. P. NICHOLS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, I). 03

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