US642911A

US642911A - Electric-lamp support.

Info

Publication number: US642911A
Application number: US73265499A
Authority: US
Inventors: Harry Long
Original assignee: Individual
Current assignee: Individual
Priority date: 1899-10-05
Filing date: 1899-10-05
Publication date: 1900-02-06
Anticipated expiration: 1917-02-06

Description

No. 642,9". Patented Feb. 6, I900.

H. LONG. ELECTRIC LAMP SUPPORT.

(Application filed Oct. 5, 1899.)

(No Modal.)

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(Application filed Oct. 5, 1899.)

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(Application filed Oct. 5, 1899.)

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ELECTRIC-LAMP SUPPORT.

SPECIFICATION forming part of Letters Patent No. 642,911, dated, February 6, 1900.

Application filed October 5,1899. Serial No. 732,654. (No model.)

To all whom it may concern:

Be it known that I, HARRY LONG, of Greentown, in the county of Howard and State of Indiana, have invented a new and Improved Electric-Lamp Support, of which the following is a full, clear, and exact description.

This invention relates to improvements in supports for electric lamps, especially lamps used for street-lighting; and the object is to provide a simple means for supporting a lamp and for raising and lowering it and so arranged that upon lowering the lamp the electric current will be automatically out off and so that a person may change or insert carbons without danger.

I will describe an electric-lamp support embodying my invention and then point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a sectional elevation of a support embodying my invention. Fig. 2 is a section on the line 2 2 of Fig. 3. Fig. 3 is a section on the line 3 3 of Fig. 2. Fig. 4 is a section similar to that of Fig. 3, but showing the parts in a different position. Fig.5 is a section on the line 5 5 of Fig. 3, and Fig. 6 is a partial elevation and partial section showing a modification.

Referring to the drawings, 1 designates a hollow post having at its upper end a horizontally-disposed arm 2, from which a tube 3 extends downward. Arranged in the lower portion of the post 1 is a sprocket-wheel4 and a sprocket-pinion 5. The shaft of the pinion 5 is extended outward through an opening in the post and is adapted to receive a crank 6, and on the pinion is a ratchet-wheel 7, engaged by a dog 8 to prevent a backward rotation of the pinion. The base of the post is provided with a door 8, so that access may be had to the interior to adjust the parts, if found necessary. Engaging with the pinion 5 and also with the sprocket-Wheel 4 is a sprocket chain 9, which extends upward through the post and over idlers 11, 12, and 13 and thence through the tube 3 to a con nection with the head or upper portion 14 of an arc-lamp.

Bigidly connected to the downwardly-ex tended tube 3 is a receiving-frame comprising a top plate 15 and a bottom ring 16, the top plate 15 and the ring 16 being connected by posts 17. The

parts

15, 16, and 17 are preferably made in one casting, and the part 15 has an interior screw-thread to engage with the screw-thread of the tube 3.

Attached to the lamp and movable into and out of the receiver is a head for the lamp, comprising a ring-shaped plate 18, a ring-shaped bottom plate 19, and segmental blocks 20, ar-

ranged between the two ring-shaped plates.

Fastening bolts 21 pass through the ringshaped platelS, the blocks 20, and the ringshaped plate 19 and engage in the portion 14 of the lamp, as plainly indicated in Fig. 3. Between thezblocks 20 and the plate 18 is a ringplate 22, and between this plate 22 and the plate 18 I preferably place an insulating material 23, consisting, preferably, of mica, and a mica insulation 24 is placed between the lower ends of the blocks and the top of the plate 19. It will be noted that the plate 19 has a downwardly-extended flange 2,5, the purpose of which will be hereinafter described.

Movable radially between the blocks 20 are stop-blocks 26. For the sake of lightness these stops are preferably made hollow. The inner surfaces of the stop-blocks are inclined downward and inward, as plainly indicated in Figs. 3 and 4, and these inclined surfaces are provided with channels 27, having undercut side walls to receive a dovetail rib 28,

formed on the lower end of the conical portion 29 of a tubular spreader 30. Upon a certain movement of the spreader, as will be hereinafter described, it is designed to engage friction-tight with a clamping-ring 31, supported from the top plate 15, but having a vertical movement relatively thereto. As here shown, bolts 32 extend from the clamping-rin g upward and at their upper ends through openings in the plate 15. The bolts 32 are provided with heads to prevent them from passing entirely through the contracted lower ends of the openings in the plate 15. The ring 31, as shown, is a split ring, so that it may yield to receive the upper end of the spreader.

Mounted to swing on the ring 16 are supporting-

latches

33, 34, and 35. Each latch is supported between lugs 36, cast integral with the ring 16, and the pivot is so arranged that the inner end will overbalance the outer end, causing the inner ends to swing downward under certain conditions. The outer ends 37 of the latches are beveled to engage a bevel portion 38 of the ring 16 to prevent the latches from being swungtoo fa-routward. Main couducting-wires 39 40 lead through the post 1 and connect with the ring 16. The wires are insulated from the ring, as clearly shown in Fig. 3, and the ends are embedded in the ring, so that the upper surfaces of the wires are flush with the uppersurface of the ring. Preferably this portion of the wires will be flattened, as indicated in the drawings, and of course the bare wire will be exposed. This exposed portion of the wire is designed to be engaged by circuit-closing wires 41 42, passing, respectively, through the

latches

33 and 34. Then the latches are in their horizontal position, the lower ends of the circuit-closing wires 41 42 will engage, respectively, with the wires 39 and 40, and the upper ends of these circuit-closing wires will engage with exposed portions of the wires 43 and 44, attached to the plate 22, but insulated therefrom. These wires 43 and 44 lead into the lamp to supply a current to the carbons. A hood 45 may be connected to the tube 3 to protect the lamp from rain or snow.

In operation when the lamp is suspended the parts will be in the position indicated in Fig. 3-that is, the latches will be in a horizontal position, with the ring 22 resting thereon. Therefore it will be seen that these latches form the support for the lamp. The current will pass through the wire 39, the wire 41, and the wire 43 into the lamp and then out through the wires 44, 42, and 40. Of course this order may be reversed. It will be noted that when the lamp is suspended the stop-blocks 26 will be moved inward, so as to permit the ends of the latches to engage with the under side of the plate 22.

When it is desired to lower the lamp, it is first drawn upward by means of the chain 9, and by this upward movement the upper outer edge of the ring 19, engaging with the

latches

33, 34, and 35, will swing said latches upward, immediately cutting out the current. This upward movement is to be continued until the latches engage with the flange 25 of the ring-plate 19, and during this movement the upper end of the spreader 30 will engage with the clamping-ring 31, forcing the same upward until it engages with the under side of the plate 15. As the parts are moved still farther upward the upper end of the spreader will engage within the clamping-ring and come to a stop, so that upon further movement of the carrying-head the stop-blocks 26 will be moved outward, so that their outer surfaces will be in vertical alinement with the edges of the plates 18 and 19. Now upon turning the gearing to lower the lamp the several parts will move downward, the frictional engagement of the spreader 30 with the ring 31 causing said ring to also move downward. During this downward movement the latches will be prevented from turning downward or inward by engaging with the outer surfaces of the stopblocks. When, however, the parts shall have been moved sufficiently downward to engage the latches with the top ring 18, the ring 31 will be stopped by the heads of the bolts 32, and when the ring 31 comes to a stop the spreader 30 will also come to a stop, so that by a farther downward movement of the lampcarrying head the stop-blocks 26 will be moved inward to their normal position, and their inward movement may be limited by suitable stops or pins. Then the lamp is again raised, the top of the plate 18, coming in engagement with the inner ends of the latches, will swing said latches upward, where they will remain until the blocks 26 are opposite the latches. At this time the latches will swing downward by gravity and support the lamp, as before mentioned. A lug 46 on the edge of the plate 18 is designed to engage in a channel 47, formed in one of the posts 17. This will guide the lamp into the supportingframe and also prevent any rotary movement of the lamp or its carrying-head while in position.

In Fig. 6 I have shown a socket 48 for receiving an incandescent lamp 49. Supported in the socket are the supporting-latches 50 and 51, similar to the supporting-latches before described and also serving as circuitclosersthat is, wires extend through these latches for connecting the contact-plates of the socket with the contact-plates connecting with the filament in the lamp. To remove the lamp from the socket, it is to be raised in the socket, so that the latches by pressing upon their outer ends may be swung with their inner ends sufficiently lifted to clear the flange 52 of the lamp. When it is desired to insert the lamp, it is only necessary to push it upward against the inner ends of the latches to swing the latches upward, and then by slightly lowering the lamp the latches will engage with the under side of the flange 52, as indicated in Fig. 6.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent 1. An electric-lamp support, comprising a suspended frame, latches mounted to swing on said frame, a lamp-carrying head with which a lamp is designed to be connected, the said lamp-carrying head being movable into and out of the frame, stop-blocks radially movable in said head, and means operated by vertical movements of the head for causing the movements of said blocks, substantially as specified.

2. In an electric-lamp support, a suspended frame or receiver, comprising a ring-shaped plate at its lower end, latches mounted to swing on the said ring-shaped plate, conducting-wires connecting with the plate, a lampcarrying head comprising a ring-shaped lower latches for closing the circuit between said lamp-wires and the main conductors when the latches are in supporting engagement with the head, substantially as specified.

3. In an electric-lamp support, a suspended frame or receiver, a head movable into and out of said frame or receiver, latches on the frame or receiver for engaging with the head to support a lamp, blocks mounted to move radially in the head and adapted when in their outer position to hold the latches in an upward position when the head carrying the lamp is moved downward, a spreader having sliding engagement with the inner portions of said blocks, and means for operating the spreader, substantially as specified.

4. An electric-lamp support, comprising a suspended frame or receiver, a lamp-engaging head movable in the frame or receiver, stopblocks movable radially in said head, latches for engaging with the head and also for engaging with the stop-blocks, the inner surfaces of said blocks being inclined downward and inward and provided with channels having undercut opposite walls, and a spreader having a conical portion provided with ribs for engaging in said channels, substantially as specified.

5. An electric-lamp support, comprising a head adapted to be secured to the lamp, a chain or the like extended from said head and connecting with a lifting-gearing, a frame for receiving said head and having a ring-shaped lower portion, latches mounted to swing on said lower portion, the inner ends of said latches overbalancing the outer ends, circuitclosing wires carried by certain of the latches, lamp-wires connecting with the head, and main conductors connecting with said ringshaped lower end of the frame, the wires carried by the latches serving to place the con duetors and lamp=wires in electrical connection, substantially as specified.

6. In a lamp-support, a frame or receiver for the head portion of a lamp, latches mounted to swing on the frame or receiver, the said latches being adapted to support the lamp, and circuit-closing wires extended through the latches, substantially as specified.

7. In an electric-lamp support, a suspended frame, a lamp-carrying head movable into and out of said frame, blocks mounted to move radially in said head, latches on the frame for engaging with said blocks when in their outer position, a spreader engaging with the inner ends of said movable blocks, and a clamping-ring for said spreader, supported by the outer portion of the frame but adapted to slide relatively thereto, substantially as specified.

HARRY LONG.

Witnesses:

AUBURN E. LoNe, CHARLTON BULL.