US544502A

US544502A - Support for incandescent lights

Info

Publication number: US544502A
Authority: US
Publication date: 1895-08-13
Anticipated expiration: 1912-08-13

Description

(No Model.) 2 SheetsSheet 1.

O. A. OARMANY. SUPPORT FOR INGANDESGENT LIGHTS.

No. 544,502. Patented Aug. 13, 1895;

v (No Model.) 2 sheets sheet 2.

, G. A. CARMANY.

SUPPORT FOR INGANDESGBNT LIGHTS.

No. 544,502. Patented Aug. 13, 1895.

UNITED (STATES l PATENT OFFICE.

CHARLES AUGUSTUS OARMANY, OF MIDDLETOW N, PENNSYLVANIA.

SUPPORT FOR INCANDESCENT LIGHTS.

SPECIFICATION forming part of Letters Patent No. 544,502, dated August 13, 1895. Application filed September 8, 1894. Serial No. 522,454. (No model.)

' To all whom it may concern.-

Be it known that I, CHARLES AUGUSTUS OARMANY, a citizenof the United States, residing at Middletown, in the county of Dauphin and State of Pennsylvania, have in vented certain new and useful Improvements in Supports for Incandescent Lights; and I do declare the following to be a full, clear, and

exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has relation to supports for incandescent electric lights; and it has for its object, among others, to provide a simple and inexpensive support whereby an incandescent electric light may be suspended from a ceiling in any desired position, the adjustment of the light being effected by simply sired position.

Other objects and advantages of the invention will be apparent from the following description,when taken in connection with the accompanying drawings; and, with the various objects in view, my invention consists in the novel construction, arrangement, and combination of parts, as hereinafter fully described. Y

In the drawings, Figure 1 is a plan view of my device complete. Figs. 2 and 3 are opposite side elevations, Fig. 2 showing in dotted lines the pawl 41, engaging the notch in the hub of the drum. Fig. 4 is a verticalsectional view. Fig. 5 is a face view of the intermeshing revolving pinion and internallytoothed gear. Fig. 6 is an opposite view thereof. Figs. 7 and 8 are opposite face views of the rotating drum upon which the electric wires or tapes are adapted to wind. Fig. 9 is a face view of the colle't or ring to which one end of the main operating-spring is secured. Fig. 10 is a plan'view of the block by which the devices are supported from the ceiling. Fig. 11 is a bottom view thereof.

In carrying out my invention I provide a suitable block or support 1, which is constructed of porcelain, lava, or other non-conducting material, and which is adapted to be secured to a ceilinghy screws 2 orotherwise. Said block is recessed'at opposite sides to receive metallic plates 3, to which the leadingin wires of the lamp are adaped to be secured by binding-screws 4, and said plates carry de pending screws 5, which are connected by wires 6 with bindingscrews 7, carried by spring-plates 8, screwed by screws 9 to the upper face of the block. The plates 8 carry at their inner free ends contact points or pins 10, which project through the block for apurpose presently explained. The upper face of the block is recessed, as at 11, also for a purpose presently apparent.

12 12 indicate suitable standards or supporting-pieces,which are of annular shape and provided with rectangular slots 13, through which are adapted to pass projections 14 on clamping-plates 15, which are provided with slots 16, through which securing-screws 17 pass into the block 1. It will be seen that when the plates 15 are adjusted inwardly to cause their projections 14 to enter the slots of the standards the latter will be firmly held in position, and. by loosening the screws 17 and moving the plates 15 outwardly the projections will free the slots and permit the standards tobe removed from the block. The supports 12 12' are provided with a series of cars 19, perforated to receive the clampingbolts 20, presently more fully described. The supports 12 12' are centrally perforated, as at 21, and 22 indicates a shaft,one end of which is loosely mounted in the perforation of support 12, while its opposite end is squared, as at 23, and is fitted in a square opening 24 in a collar or bushing 25, which is rotatably mounted in the perforation of the support 12'.

26 indicates a collet or ring which is pro- Thus, by rotating the Ininished. By fitting a key into the socket of the collar the shaft may be readily turned in either direction, as required. Against the ring 26 is adapted to be fitted a paper, wooden, or other insulating-disk 3l,which is provided with perforated cars 32, corresponding in position with the cars 19, and through which pass the bolts 29. The disk 31 is provided with a central opening 33*, through which the shaft 22 freely passes.

Secured at one end upon the inside of the collet or ring 26-is a leaf-spring 33, whose opposite end bears upon the outermost convolution of the spring 30, and said bearing-end of the spring 33 is broadened and projects through an opening 34 in the disk 31 and engages with one arm of a lever or pawl 35, which is pivoted upon one of the bolts 20. The opposite end or arm of the pawl lies clear of the path of a pin or lug 36, carried by the winding and unwinding drum 37, which is rotatably mounted upon the shaft. the position of the pawl when the parts are in their normal operative positions; but in case the spring should break, then the stress of the same would force the spring 33 toward the inner face of the ring, and this would cause the free end or arm of the pawl to be thrown into the path of the pin or lug 36, and thus prevent the rapid rotation of the drum 37 and consequent descent of the lamp.

The drum 37 is provided with the two outer flanges 38, of metal, and the hub 39, of nonconducting material, said hub being provided in its circumference with a recess or notch 40, into which is adapted to take one end of a pawl 41, of non-conducting material, secured at its opposite end upon a metallic sleeve 42, pivoted upon one of the securing-bolts 20. I would state that the engagement of the pawl with the notch or recess occurs only when the conducting-wires for the lamp have been nearly unwound from the hub, (such engagement being shown in Fig. 2,) the object in view being to prevent the continued rotation of the drum when the said wires are pulled upon and thus prevent breakage or detach- -ment of said wires from the binding-screws.

For securing the conducting-wires to the flanges of the drum I recess the hub, as at 43, and also slot the flanges'and loosely insert therein contact-sleeves 44, which lie within the recesses in the hub, and against which sleeves the ends of the conducting-wires are adapted to be clamped by binding-screws 45, which work within the said heads.

46 are spring-arms, secured to the flanges and bearing against the projecting ends of the sleeves 44 to hold the same firmly in place. By pressing the arms 46 outwardly to clear the head of sleeves 44, the latter can be removed and the conducting-wires conveniently and securely fastened in place. The hub of the drum 37 is integral with or has secured to it a gear-wheel 48, which is adapted to mesh with a pinion 49, rotatably mounted This is upon a stud50, carried by a disk 51, loosely mounted upon the collar 25. Said pinion 49 meshes with an internally-toothed wheel or disk 52, which is provided with pins 53, which are adapted to snugly fit within sockets 54 in the support 12, thus holding the disk or wheel 52 incapable of rotation at all times.

In orderto increase the tension of the spring when necessary without disturbing the drum or lamp, I secure a ratchet-wheel 55 upon the collar 25, with which ratchet engages a suitable pawl 56, secured on one face of disk 51 and projecting-through a slot 57 therein, and held in engagement with the teeth of the ratchet by a spring 58, secured to the opposite face of the disk 51. It will be seen that by fitting a key into the squared socket 24 of the collar 25 the shaft 22 may be turned to effect the winding up of the spring, and at the same time the revolution of the collar 25 causes a rotation of the ratchet-wheel 55, the teeth of which, however, will ride beneath the pawl during such rotation. Then the winding is discontinued, the pawl and ratchet again engage, transmitting the increased tension through the disk 51, pinion 49,and pinion 48 to the drum.

The drum when mounted on the shaft makes contact with the lugs or pins 10 through the medium of its flanges 38, and inasmuch as said pins are carried by spring-arms, the contact is maintained atall times during the operation of the device.

The stress of the main spring should be such that the same will about counterbalance the weight of the lamp and maintain the same in any desired position to which'it may be adjusted,and so that at the same time said lamp may be either drawn down by gently pulling downwardly upon the same or raised by simply pushing upwardly on thelamp. If it be found that the stress of the spring, be not sufficient to accomplish the described results, the shaft may be turned to increase the stress of the spring to the desired extent.

The conducting-wires, which serve to suspend the usual lamp 59 from the device and at the same time conduct the current to the incandescent filament thereof, may be the usual wires employed for this purpose suitablyinsulated, though I prefer to employ conducting-wires constructed in the form of a flat tape 60, insulated and having a width to adapt it to wind snugly between the flanges of the drum.

In the operation of the device, when the lamp is drawn downwardly the drum 37 will be rotated, and, by reason of the gear-wheel 48 meshing with the pinion 49, the'latter will be caused to revolve within the disk 52 and at same time effect the rotation of the disk 51 and the collar 25, whereby the shaft 22 will also be rotated and effect the winding of the spring. When the lamp is to be raised in its position, the same will be assisted in its upward movement by the stress of the previously- 1. In a device of the character described, the

combination with a block, of supports carried thereby and having slots therein, clamping plates having slots, securing screws passing through said slots and into the block, and projections on said plates adapted to enter said slots in the supports, a shaft mounted on said supports, and a drum rotatably mounted on said shaft as and for the purpose specified.

2. In a device of the character described, the combination with a block, of supports carried thereby, spring arms carried by the block, contact pins or lugs carried by the said arms and projecting through the block, a shaft mounted on the supports and a drum rotatably mounted on the shaft and in 'contact with said pins or studs, as and for the purpose specified. p

3. In a deviceof the character described, the combination with a block, supports carried thereby, a shaft mounted on said supports, a drum rotatably mounted on the shaft and having a hub provided with a notch or recess, a pivoted pawl adapted to engage with said recess, and conducting wires secured to flanges on the drum and upon which wires said pawl is adapted to bear until the said wires have been unwound from the hub, as and for the purpose specified.

4. In a device of the character described, the combination with a block, supports carried thereby, a disk secured to one of said supports, a convolute spring secured at one end to said disk, a shaft to which the opposite end of the spring is secured, a drum rotatably mounted upon the shaft, a leaf spring secured at one end to the disk and bearing at its opposite end upon the convolute spring, a pivoted pawl or lever engaged by said leaf spring, and adapted to be tilted thereby as described, and a drum rotatably mounted upon the shaft and having a pin lying normally out of contact with the said lever and adapted to be struck by the latter when tilted as described.

5. In a device of the character described, the combination with a block, of supports carried thereby, a shaft, a collar loosely mounted upon said shaft, a disk loosely mounted on said collar, an internally toothed gear wheel secured to one of the supports, a drum rotatably mounted upon the shaft, a pinion carried thereby, an intermediate gear wheel loosely carried by the said disk and meshing with the said pinion and internal gear wheel, and a spring operating upon the parts, for the purpose specified.

6. In a device of the character described, the combination with a block, of supports carried thereby, a shaft, a collar loosely mounted upon said shaft, a disk loosely mounted on said collar, an internally toothed gear wheel secured to one of the supports, a drum rotatably mounted upon the shaft, a pinion carried thereby, an intermediate gear wheel loosely carried by the said disk, and meshing with the said pinion, and internal gear wheel, a spring operating upon said parts as described, a ratchet Wheel on the collar, and a pawl carried by the disk and engaging said ratchet, as and for the purpose specified.

7. In a device of the character described, the combination with a block, of supports carried thereby, a shaft rotatably mounted. at one end in one ofsaid supports, a collar at the opposite end of the shaft rotatably carried by the other support, said collar having a square opening into which a squared end on the shaft fits,'a disk secured to one of the supports, a convolute spring secured at one end to said disk and at the opposite end to the shaft, an internally toothed gear wheel secured to the other support, a disk rotatably mounted on said collar, a drum rotatably mounted on the shaft, a pinion carried by said drum, an intermediate gear wheel loosely carried by the said disk and meshing with the said pinion and internal gear wheel, a ratchet Wheel on the collar, and a pawl pivoted to the disk carrying the intermediate gear wheel and engaging said ratchet.

In testimony whereof I afiix my signature in presence of two witnesses.

. CHARLES AUGUSTUS CARMANY.

. Witnesses: E. M. RAYMOND, S. L. YETTER.