US984687A

US984687A - Hanger for electric lamps.

Info

Publication number: US984687A
Application number: US35437407A
Authority: US
Inventors: Junius Emmett Mayo
Original assignee: NAT SEWING MACHINE CO
Current assignee: NATIONAL SEWING MACHINE CO; NAT SEWING MACHINE CO
Priority date: 1907-01-28
Filing date: 1907-01-28
Publication date: 1911-02-21
Anticipated expiration: 1928-02-21

Description

l J. E. MAYO. HANGER FOR ELEGTRIG LAMPS. APPLICATION -IILED STAIL-28,1907. v 984,687, Patented 11611.21, 1911.

3 SHEETS-SHEET 1.

J. E. MAYO.

HANGER FOB. ELECTRIC LAMPS. APPLICATION FILED 1.111.211,1907.

Patented Feb.21, 1911.

3 SHEETS-SHEET 2.

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J. E. MAYO. HANGER POR'ELEGTRIG LAMPS. APPLIGATION FILED JAN.28,1907.

984,687. .Patented Feb.21, 1911.

go M UNITED STATES PATENT OFFICE...

Jn'UNIUS EMMETT MAYO, OF BELVIDERE, ILLINOIS, ASSIGNOB, TO NATIONAL SEWING MACHINE CO., OF BELVIDERE, ILLINOIS, A CORPORATION OFILLINOIS.

HANGER FOR ELECTRIC LAMPS.

'o all whom it may concern.:

Be it known that I, JUNIUS E. MAYO, a citizen of the United States, residing at Belvidere, in the county of Boone and State of Illinois, have invented certain new and useful Improvements in Hangers for Electric Lamps, of which the following is a full, clear, and exact specification.

This invention relates to that class ot hangers for suspending electric lights from an overhead support, in which provision is made for lowering the lamp from its elevated position and automatically cutting it out of the circuit without opening the circuit through other lamps in the circuit, and it has, for its primary object, to provide an improved and etticient construction ot lamp hanger of this character, which shall be appropriate for use with a metallic cable tor raising and lowering the lamp supporting member of the hanger without danger to the operator.

Another object of the invention is to provide an improved form of joint connection between the hanger proper and the pulley bracket, whereby the hanger proper will be given freedom of movement in all directions without interfering with the free run ot the cable.

IVith a view to the attainment of these ends, and the accomplishment of certain other objects which will hereinafter more fully appear, the invention consists in certain features of novelty which will now be described with reference to the accompanying drawings and more particularly pointed out in the claim.

In said drawings Figure 1 is a vertical sectional View, partly in elevation, of a lamp hanger with the pulley bracket thereon, showing the lamp supporting plunger locked in place with the lamp in circuit. Fig. 1a is an enlarged detail view showing the manner of connecting the conductor to one of the contact rings on the plunger.`

Fig. 2 is an enlarged side elevation of the pulley bracket showing the same open. Fig. 3 is a vertical sectional view of the lamp bracket showing the plunger lowered with the lamp cut out. Fig. 4 is a transverse sectional view on line 4 4, Fig. 1. Fig. 5 is a similar view on line 5-5, Fig. 1. Fig. 6 is a similar view on line 6 6, Fig. 1. Fig.

Specification of Letters Yatent.

Application filed January 2S, 1907.

Patented nel. ai, 1911.

Serial No. 354,374.

7 is a side elevation with the casing broken away showing the plunger' in place with the lamp in circuit. Fig. 8 is a detail perspective view ot the plunger and connected parts on an enlarged scale. Fig. 9 is a detail side elevation ot the cut out switch showing also the connections between one of the conductors and the upper contact ring, and Fig. 10 is an enlarged detail view of the opposite member of the cut out switch showing also the connection between theA other conductor and the lower contact ring.

This invention is designed more especially as an improvement upon the hanger for electric lamps shown in my U. S. Patent No. 614,484 ot November 2Q, 1898, and to which reference may be had tor a more detailed description of parts which are common to both devices.

In my former construction it will be seen that the lamp supporting plunger marked K in my former patent and 1 in my present invention, is directly in circuit with the lamp and the hoisting rope which is connected directly to the plunger cannot, ot course, be composed of anything excepting a material ot an insulating or non-conduct ing character. Formerly this hoisting member has been composed ot hemp or cotton rope, but even this becomes saturated with moisture and in time affords a tair passage for the current which not only is thereby communicated to the body ot the operator handling the hoisting rope, but to other parts of the device, and through it to the building. Furthermore, the use ot hoisting rope composed ot cotton, hemp or other vegetable fiber, is objectionable for the reason that these ropes are desirably of small'diameter and are liable to break and permit the lamp to tall.

In my present invention the hoisting rope which is shown at 2 may be composed of a metallic cable. Its lower end issecured by nut 3 to the upper end ot the plunger 1 and this plunger is provided with a locking device 4 ot' the usual or any suitable construction adapted to engage in a recess 5 in the inverted socket piece 6, all as described in the aforesaid patent. The upper end of the socket piece G is supported in a hood 7 on a suitable block 8 ot' insulation and its lower end is provided with an insulating sleeve or jacket 9 on which are mounted two conducting plates or rings 10-11, the upper ring 10 being mounted on a flange or enlargement 12 ot the insulating sleeve 9 and is of greater diameter than the lower ring 11 so that the elastic contact clips 13-141 which are adapted to engage with rings 10-11 respectively, and will not engage the wrong ring. Any suitable number of these contacts 13-1Ll may be employed. ln the present exempliiication of the invention two of each are used, those for the upper ring 1() being longer than those which engage the lower ring 11. These contact clips are mounted upon the plunger 1 and are insulated therefrom by means of a sleeve or jacket 15 of any suitable insulating material. rllhe clips 13 have their lower ends connected to a conducting ring 16 and the clips 14: are secured to a similar ring 17 but which is prete 'ably ot larger diameter than the ring 16 and is mounted upon an enlarged shoulder of the insulating sleeve 15 so that the clips 111 will not touch the ring 1G but will pass thereby and engage their proper contact ring 11 above. The lips 13, 14: being arranged in different vertical planes, the lip 13 will pass a ring 11 as the plunger is being inserted into or withdrawn from the socket and will engage only their respective ring 10.

18-19 are the main line conductors which pass into the hood 7 through suitable entrances such as 2O containing insulating linings 21. The conductor 18 is secured to binding post 22 and this post is connected to the lower contact ring 11 by a conductor 23 which is in the torni of a thin plate or strip and passes through the flange or shoulder 12 as shown in Figs. 3 and 10, the upper and lower ends ot the strip being enlarged for the passage ot the binding post or screw 22 and a screw 211 respectively which secures its lower end to the ring 11. From the ring 11 the c rrent takes its course to the lamp 25 via contact clips 14, ring 17 and the conductor 2G secured to ring 17 by screw 27 or other suitable means, and leading to the lamp and from the lamp it returns to its source via the conductor 28 connected to ring 16 by means of screw 29, or other suitable device. and from ring 1G to the ring 10 along contact clip 13, the ring 10 being connected to the conductor 19 by a short connection 30 which is similar to the connecti on having its ends enlarged for the passage ot two screws 31-32 which connect it to the ring 10 and to the conductor 19. The binding screw 32 also serves as a means of connecting the plate 30 and conductor 19 to a plate 33 which is mounted upon a block of insulation 314C on the side of the socket piece t5 and which forms part of a switch Contact see Fig. (l, the companion contact 36 being attached to the spring 37 which is mounted upon a` similar block of insulation 3S on the side of the socket piece (3, the binding screw 22 betore described serving also to connect the conductor 18 to the switch spring 37.

Mounted in the side of the socket piece 5 and directly behind the spring 37 is a stud 3f) adapted to project into the. cavity ot the socket piece and having a head l0 at its outer end to hold it against inward displacement. This stud 39 is composed oi insulation or nonconducting material or any other provision may be made tor preventing the stud from conducting the current 4from the spring 37, so that when the plunger 1 is forced into the socket and engages with the stud 3f) the cut-out switch members 36 will be forced out of engagement with each other and the current will be compelled to pass through the lamp without any oi the currentl being counnunicated to the plunger 1 or metallic parts oli the device eX- cepting the .regular electric conductors. lhen the plunger 1 is withdrawn, the spring 37 forces the stud inwardly and the contacts H36 are brought together for com pleting the circuit or shunting it around the lamp. i

The upper side oi the hood 7 .is provided with a hollow stem l1 through which the cable 2 passes upwardly overla pulley 42. The sides of this stem L11 are formed with trunnions or pivots d3 which are journaled in bearings 4t-i5 produced in two halves 46h17 respectively ot a pulley casing or bracket which are connected together by hinge i8 and adapted to told together and inclose the pulley il-2 and that portion of the cable immediately contiguous to the pulley, thereby affording a convenient means for readily placing the cable in position on the pulley as well as mounting the lamp hanger proper with its trunnions 43 in the pulley bracket. The upper side of the pulley bracket on one or" the members iti-117 is provided with an elongated sleeve or bearing 19 which receives journal 50 looped downwardly from a ceiling plate 51 adapted to be secured to the ceiling` or any other suitable overhead support in the usual or V any appr ipriatc manner, the journal being at an angle to the trunnions so that the two together constitute an ellicicnt oint connection for the hanger, permitting treedom of movement in directions atl substair tially right angles to each other, while the lamp itself as it hangs from its usual supporting pulley 52 on the lower end of the plunger 1 is capable oli rotating with said plunger on a vertical axis without interfering with the electrical connections.

In order that those skilled in the art may understand the invention an exemplification thereof has been thus specifically described, but

What I claim as new and desire to secure by Letters Patent is In a device for the purpose described, the combination with an apertured socket provided with two conducting rings of different diameters coaXia-lly arranged and insu- 4 lated therefrom and from each other7 said rings being adapted to have conductors from the main line of an electric lighting circuit secured thereto, of a plunger for mounting an electric lamp, a wire cable secured to said plunger and movable through the aperture in said socket for lowering and raising said lamp, and contacts for connection with the terminals of the lamp, said contacts being be moved into and out of Contact with said f conducting rings by the movement of said plunger.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 24th day of January A. D. 1907.

JUNIUS EMMETT MAYO.

fitnesses z JOHN W. ELDREDGE, FRo TURRELL.