US1120160A - Hanger for arc-lamps. - Google Patents

Description

Q Wnwassas G. E. POPE & R. S. PHILLIPS. HANGER FOR ARC LAMPS. APPLICATION FILED FEB. 7, 1914.

1,120,160. Patented Dec.8,1914.

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G. E. POPE & R. S. PHILLIPS. HANGER FOR ARC LAMPS. APPLICATION FILED FEB. 7, 1914.

1,120,160. Patented Dec. 8, 1914.

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UNITED STATES PATENT OFFICE.

CHARLES E. POPE AND ROSS S. PHILLIPS, 0F CLEVELAND, OHIO; SAID FI-IILLIPS ASSIGNOR TO SAID POPE.

HANGER FOR ARC-LAMPS.

Application filed February 7, 1914.

T 0 all whom it may concern:

Be it known that we, CHARLES E. Porn and Ross S. PHILLIPS, citizens of the United States, and residents of Cleveland, county of Guyahoga, State of Ohio, have jointly invented a new and useful Improvement in Hangers for Arc-Lamps, of which the following is a specification, the principle of the invention being herein'explained and the best mode in which we have contemplated applying that principle, so as to distinguish' it from other inventions.

The present improvements, relating as indicated to hangers for are lamps and the like, have more particular regard to the construction of a hanger which will not only serve to detachably support such a lamp, but also provide separable electrical connections for the same, so that the use of independent leads to the lamp is obviated, as well as the necessity of providing a switch to control the lamp at some point removed therefrom, as is at present the case.

A further object is to provide a. switch which may not only be thus connected and disconnected with the lamp, but which will also close the circuit upon the lamp being detached from the hanger and thus avoid cutting out the current for the other lamps which may be in series with the particular lamp in question.

To the accomplishment of the foregoing and related ends, the invention, then, consists of the means hereinafter fully de scribed.

The annexed drawings and the following description set forth in detail certain mechanism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawings :Figure 1 is a front elevational view of our improved hanger showing the upper portion of a typical arc lamp suspended therefrom; Fig. 2 is a vertical sectional view of such hanger, the plane of the section being inclicated by the line 2-2, Fig. 8; Fig. 3 is a similar section of a portion of the hanger taken on a plane at right angles to that of Fig. '2, as indicated bythe lines 3-3, Figs. 1 and 2; Fig. 4 is a sectional view of a detail taken on the same plane as Fig. 3, but show- Specification of Letters Patent.

Patented Dec. 8, 1914.

Serial No. 817,121.

ing a different operative position of the parts; Fig. 5 is a horizontal sectional. view taken on the plane indicated by the line 5-5, Fig. 2; Fig. 6 is a bottom plan view of the lower member of the hanger; Fig. 7 is a transverse section taken on the plane indicated by the line 77, Fig. 2; Fig. 8 is a perspective View of a contact member forming one of the features of the invention; Fig. 9 is a side elevational view of a plunger cooperative with such contact member; while Figs. 10 and 11 illustrate certain details of construction.

The main or body member 1 of our improved hanger, which will preferably be made of porcelain is of general cylindrical form with a central aperture 2 extending therethrough and an upwardly extending annular chamber 3 surrounding such aperture. This chamber, together with two oppositely disposed recesses 1 constituting extensions thereof serve to accommodate various operative parts, as will be presently set forth.

Attached to the body member is a cap made up of two shell like parts 5 and 6, the first one directly attached to the upper end of the body, the other secured to such first part by means of the same bolts 7 that secure such first part, but held spaced therefrom by interposed lugs 8. This outer shell 6 of the cap is provided with a clevis 9, or like means, whereby the structure as a whole may be supported from either a hook, bracket, cross wire or the like, as may be required. This cap also carries a spreaderarm 10, to which the lead wires 11 or the like are first attached before being carried into the hanger for connection with the lamp 12. v

The lamp, of which, as previously stated, only the upper portion is shown in Fig. 1, is suspended by means of a suitable clevis 13, or the like, from a second body member 14, preferably composed like the first of porcelain and adapted to be detachably secured to the lower end of such first member. The general form of this second member is clearly shown in Figs. 2 and 6. To detachably secure the lower member 14, from which the light is thus directly suspended, to the upper member 1 of the hanger, such lower member is provided with an upwardly extending tubular stem 15, through which passes the end of a supporting cable 16, that is looped or otherwise detachably secured to a cross-bar 17 in such stem. Said cross-bar preferably is in the form of a pin that is removably held in slots 35 in the tubular stem 15 as shown in Figs. 10 and 11, these slots being open on one side near their lower ends, as at 36, to permit of the introduction of said pin after the cable has been attached thereto. By this construction it is possible to quickly and easily assemble the parts, as also to separate them should that become necessary. From the stem 1:), the cable passes upwardly through a central opening 18 in the lower shell 5 of the cap and thence over a sheave 19 supported in the upper shell 6, to a post, or other point to which access may be conveniently had for raising or lowering the lamp by drawing in or paying out the cable.

To secure the lower member of the hanger to the upper or main member, latching mechanism shown in detail in Figs. 3 and 4 is provided, such mechanism comprising two oppositely disposed, pivotal hooks 20 that are normally pressed inwardly by means of springs 21 so as to engage with a head 22 on the stem 15. The latter has its upper face beveled so as to force the hooks apart as the lower member with its stem is drawn upwardly through the medium of the cable 16. The hooks 20, moreover, are provided with gravity actuated plungers 23, which, although they are displaced by the head of the stem, when thus raised, so as to allow the hooks to engage such head, will nevertheless fall back into place as shown in Fig. 4,

' whenever the head is raised above the hooks.

1f thereupon the head be lowered away, these plungers will effectually prevent reengagement of the head with the hooks.

By virtue of the foregoing construction it will be seen that the stem 15 on the lower member of the hanger may be drawn upwardly from the position shown in full lines in Fig. 8, until the head 22 occupies the position shown in dotted outline in said figure, thereby effecting engagement be tween the head and hooks 20. g If, however, the head be subsequently raised into the position shown in Fig. 4, the hooks will be thrown out of such engagement, the plungers 23 allowed to drop down, and then the head may be lowered away, entirely clear of the hooks.

The lead wires 11 enter the upper or main body of the hanger through oppositely disposed apertures 24 therein, and thereupon branch, the ends of the respective branches of each wire being connected with the outer and inner members, 25, 25 and 26, 26, respectively, of two pairs of contact members. The general form of these is illustrated in Fig. 8, which shows one of the outer memhere 25. The inner members are like such outer members save that the lower ends are beveled in the opposite direction. These contact members are pressed downwardly by means of springactuated plungers 27 of the form shown in Fig. 9, which rest on the upper end of each pair and at the same time serve to keep such contact members properly spaced apart, it being understood that the plungers are composed of insulating material. 'Tr'ansversely disposed pins 28, however, serve as stop-elements to limit such downward movement of the contact members, these pins being constructed of conductive material, whereby, when either pair of contact members rests thereon, a short circuit is established for the lead wires.

The lower, oppositely beveled ends of each pair of contact members 25, 26 are adapted to engage correspondingly beveled contact rings 30, 31, on the upper edge of the lower hanger member 14:, the wires 32 that serve the lamp being connected, one with one of these rings and the other with the other. The disposition of these rings is such that when the lower hanger member is locked in engagement with the upper member, as shown in F 2, the contact members 25, 26 will not only engage therewith, but be raised above the pins 28, so that the 95 current from the leads 11 is obliged to flow through the lamp. This engagement con- 2 tinues while the lower member is drawn still farther upwardly in order to effect the release of the head 22 from the hooks 20 of. the latching mechanism, but upon the lower member being lowered away, following the release of the head from the latching mech anism, the contact members can obviously follow the rings on said lower member only until they rest on the pins. Whichever pair of contacts chances thus to rest on the pins first, by establishing a short circuit, as previously described, cuts'out the current from the lamp, and the latter may thereupon be lowered safely until it is within reach of the operator. By reason of such short circuit being established before the lamp circuit is finally broken, the tendency to are which would otherwise occur upon separat 115 ing the contact rings from the contact members is overcome. At the same time the assurance of a satisfactory electrical'connection between the lamp and the leads is at alltimes had.

The foregoing construction of hanger it will be apparent possesses a number of meritorious features in addition to the contact making and breaking mechanism. Particular attention iscalled to the latch mech- 125 anism whereby the lower portion of the hanger to which the lamp is. directly attached may be readily connected or disconnected from the upper portion of the hanger. At the same time regard has been 130 had throughout the design of the hanger to so fashion the same as to simplify the manufacture and assembly of the parts.

We therefore particularly point out and distinctly claim as our invention 1. In mechanism of the character described, the combination of a main member; a movable member adapted to support a lamp; electrical contacts carried by the members and positioned to be closed when the members are secured together and to be broken whenthey are separated; an upwardly extending stem on the movable member provided with a head; movable hooks secured to the main member and normally in position to engage the head and arranged to be moved to disengaging position by the head during upward movement of the latter; and slidable plungers carried by the respective hooks and tending to slide into position to guard the hooks and arranged to be moved from such position by the head during upward movement of the latter.

2. In mechanism of the character described, the combination of a main member; a movable member adapted to support a lamp; electrical contacts carried by the members and positioned to be closed when the members are secured together and to be broken when they are separated; an upwardly extending stem on the movable member provided with a head having a cam upper surface; hooks pivoted to the main member; springs tending to force the hooks into position to engage the head, the hooks being movable from such position by the cam surface of the head during upward movement of the latter; slidable plungers carried by the respective hooks and tending to slide downwardly to guard the hooks, the plungers being movable upwardly by the cam surface of the head during upward movement of the latter.

3. In mechanism of the character described, the combination of a main member; a movable member adapted to support a lamp; means for detachably securing the members together; a pair of contacts movably mounted on the main member; a conductor secured to the main member and positioned to limit movement of and connect the movable contacts, the latter tending to move into engagement with the conductor; and a pair of contacts secured to the movable member and positioned to contact with the contacts on the main member and move them from engagement with the conductor.

4. In mechanism of the character described, the combination of a main member; a movable member adapted to support a lamp; means for detachably securing the members together; a conductor secured to the main member; a vertically movable pair of contacts encircling the conductor, the latter limiting their downward movement; a spring tending to move the contacts downwardly; and a pair of contacts secured to the movable member and positioned to contact with the contacts on the main member and move them upwardly.

5. In mechanism of the character described, the combination of a main member provided with a body formed of insulating material having a central chamber and an annular chamber surrounding the central chamber; a movable member adapted to support a lamp; means positioned in the central chamber detachably securing the members together; and separable electrical connections for the lamp positioned in the annular chamber.

6. In mechanism of the character described, the combination of a main member; a movable member adapted to support a lamp; electrical contacts carried by the members and positioned to be closed when the members are secured together and to be broken when they are separated; means for detachably securing the members together; and means for raising and lowering the movable member, including a sheave mounted on the main member, a tubular stem on the movable member, a cross-bar removably held in the stem, and a cable secured at one end to the cross-bar and passing upwardly through the stem and over the sheave.

7. In mechanism of the character described, the combination of a main member; a movable member adapted to support a lamp; electrical contacts carried by the members and positioned to be closed when the members are secured together and to be broken when they are separated; means for detachably securing the members together; and means for raising and lowering the movable member, including a sheave mounted on the main member, a tubular stem on the movable member, a cross-bar removably held in the stem, and a cable looped at one end around the cross-bar and passing upwardly through the stem and over the sheave.

Signed by us, this 5th day of February, 1914.

CHARLES E. POPE. ROSS S. PHILLIPS.

Attested by- D. T. DAVIES, A. L. GILL.

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

Washington, D. G.

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