US624703A - Electric-arc lamp - Google Patents

Description

Patented May 9, I899. C. TEPEL. ELECTRIOYABC LAMP.

(Application filed Apr. 26, 1898.)

2 Sheets-Sheet I.

(No Model.)

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No. 624,703. Patented May 9, I899. C. TEPEL.

ELECTRIC ARC LAMP.

. (Application filed Apr. 26, 1898.) (NolodeL) 2 Sheets5heot 2.

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ATTOR/VEVJ m: uoams vzwzas co. PHOTO-LITHQ, WASHIN UNITED STATES PATENT OFFICE.

CHRISTIAN TEPEL, or BENNETT, PENNSYLVANIA.

ELECTRIC-ARC LAM P.

SPECIFICATION forming part of Letters Patent No. 624,703, dated May 9, 1899. Application filed April 26, 1898. Serial No. 678,848. (No model.)

To all whom it may concern:

Be itknown that I, OIIRIsTIAN TEPEL, a citizen of the United States of America, residing at Bennett, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Arc-Lamps, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in electric-arc lamps; and it has for its object to provide an arclamp which will be absolutely shadowless and which may be used either for suspending vertically or for supporting by a stand in a horizontal position.

The object of my invention is to provide such an arc-lamp as will produce a constant and brilliant light and to this end to provide improved feed mechanism, which will be hereinafter described.

A further object is to construct an arc-lamp having a shade for reflecting the light of the same.

A still f urtherobj ect is to lengthen the life of the carbons, which is accomplished by means of making the globe surrounding the meeting ends of the carbons perfectly airtight.

A still further object is to construct an arclamp having an improved feeding mechanism which may be operated with either a direct or alternating current and which will also operate without respect to the angle at which the lamp may be placed.

To this end my invention consists in the peculiar features and combination of parts more fully described hereinafter and pointed out in the claims.

In the accompanying drawings, Figure 1 is a side view of my improved electric arc lamp, partially in section. Fig. 2 is a side view of the lamp, showing the same mounted upon a stand, so as to be used in a horizontal or inclined position. Fig. 3 is a detail side View of a portion of the lamp, showing the application of a weighted lever in lieu of the dashpot. Fig. 4 is a perspective view of this weighted lever. Fig. 5 is an underneath plan view. Fig. 6 is a perspective view of a portion of the hood within which the resistancecoils are arranged, showing the switch closed in full lines and open in dotted lines. Fig. 7

- is a perspective view of the feeding mechanism, showing a portion of the carbon-holder and carbon. Fig. 8 is a perspective view of the bracket or support for the feed-lever and which also forms a feed-regulator. Fig. 9 is a perspective view of a portion of thecarbonholder; Fig. 10 is a perspective view of the removable U -shaped yoke through which the carbon-holder passes and which surrounds the lower portion of the feeding mechanism. Fig. 11 is a perspective View of one of the globe-holders. Fig. 12 is a sectional view of the dash-pot. Fig. 13 is a perspective View of the disk which grips and moves the carbon. Fig. 14.- is a sectional View of the same. Fig. 15 is a plan view of the washer employed for forming an air-tight seal around the carbon at its entrance through the globe-holder. Fig. 16 is a sectional View of the same.

Referring to the drawings by referencenumerals, 1 indicates the semicircular-shaped reflector, which is or may be of a casting and has its inner or concave face highly polished, niekeled, or coated with porcelain or like In aterial in order to serve the purposes of a reflector. This reflector has mounted upon its apex a rod or stud 2, which acts as a support for the solenoid 3. The core of this solenoid has connected thereto a cross-head 4:, to the ends of which are attached rods 5, loosely pivoted at their lower ends to the levers 6, forming a portion of the feeding mechanism, one of said levers 6 extending on each side of the rod or stud 2, which supports the electromagnet. The dash-pot for this solenoid is composed of an exteriorly screwthreaded sleeve 7, which is either secured in or formed integral with the apex of the arched yoke, brace, or support 8, the lower ends of which are rigidly secured to lugs 9, formed therefor on the outer wall of the reflector 1. Fitting neatly within the exteriorly-screw-threaded sleeve 7 is a cylinder 9, which is or may be retained in its position by a pin 10, passing through the sleeve and through a stud 11, formed 011 the end of said cylinder. The piston-rod 12 is connected at its lower end to the core of the solenoid. The yoke or sup port 8 also forms the means by which the lamp is either suspended or supported, as well as acting as a support for the resistancecoils and their receptacle. This latter is composed of a semicircular-shaped hood 14, which is or may be provided in its convex face with spirally-arranged grooves 15, within which is arranged the resistance coil or coils 16, where they are retained by a spider 17, which fits over the screw-threaded sleeve 19 and is or may be retained in its position by a nut 18 engaging the said sleeve. To the upper end of this sleeve may also be attached a suspension-pulley, or a nut carrying a ring may be employed for this purpose, as will be readily understood. The specially-arranged walls which are formed by the spiral grooves in the convex face of the hood 14 are or may be provided with notches, within which the projecting arms of the spider will lie in order to hold the resistance-coil firmly in position. The switch by means of which the current may be connected or disconnected may also be arranged in this porcelain hood 14. Said switch may be of any desired form of construction, though in the drawings I have shown the same as composed of the two contact-points 20 and 21,the arm 22,the operating rod orshaft 23,and its handle 24, to which are or may be attached chains or cords, if desired. The feed-wire 26 being attached to the contact-point 20, the current will be off when the arm 22 is in engagement with said contact 20 and with the contact 21. \Vhen, however, the handle 24 is operated so as to move the arm 22 out of contact with the contact-point 20, as is shown in dotted lines in Fig. 6, the electrical circuit will be admitted to the lamp.

The electrical connections are made as fol-' lows: One end of the resistance-coil is connected to the contact 20, thus introducing the current from the feed-wire 26 to the said resistance-coil, the otherend of the resistancecoil being connected by the current-wire 27 to the upper end of the solenoid. The action is completed by the wires 28 and 29, the former of which connects the solenoid with the terminal 30 on the one side of the lamp and the latter of which connects the terminal 31 on the other side of the lamp with the contactpoint 21.

I will now describe the improved feeding mechanism and also the manner in which the same is operated to keep the carbons constantly in feed.

The levers 6 are each connected to the sleeve 32, which is journaled between brackets 33 and provided with a tongue 34, which engages in a groove 35, provided therefor along the two top edges of the U-shaped supporting-bracket 36. This latter is adapted to be inserted through the side of the reflector 1 in openings which are provided therefor in the said reflector. The levers 6 are formed integral with the sleeves 32, or they may be rigidly connected thereto in an y suitable manner, so that when these levers are operated by their connection through the levers 5 and cross-head 4 with the magnet they will operate the sleeve 32 and cause the same to move the lever 37, which is also formed integral is moved within its holder 39 by means of the lever 42, which is pivotally attached to the lever 37, the upper end of the same engaging in and being supported by the end 43 of the standard 44, said standard being provided with a bifurcated lower end 45, which may be secured to the lug 46 provided therefor on the convex or outer wall of the reflector 1. The carbon-rod 41 is moved by means of the disk 47, through which it passes eccentrically, the aperture in said disk for the carbon-rod having its edges beveled, as shown in the detail and sectional views in Figs. 13 and 14, so as to form the gripping-faces 48, which engage the said carbon-rod. to the disk 47 and is pivoted to thelowerend of the lever 42. The inclosing globe 50 is supported between two supporting plates 51, which are formed with ears or lugs 52, by means of which the same are supported from the brackets 33, said plates 51 being provided on their inner face with two circumferentiallyextending flanges 53 one within the other and between which the ends of the globe fit. In order to make the globe perfectly air-tight, a suitable gasket may be placed within the annular chamber formed between these two flanges 53 and against which the end of the globe will abut.

In order to regulate the throw of the levers controlling the feeding mechanism, I may provide the standard 44 with an extending lug 44, in which may be placed an adjustingscrew 44, said screw being directly over thelever 6 and limiting the movement of the same.

In Fig. 2 of the drawings I have shown the application of my improved arc-lamp for suspension purposes, where it is desired to have the lamp placed horizontally or at any required angle. For such a purpose I have shown an extension composed of a base 54 and standard 55, secured thereto and provided on its upper end with a ball 56 to receive the socket 57, which is or may be fastened to one of the standards of the arch 8. When used in this manner, I have found that a weighted lever will better perform the functions desired than the dash-pot, as shown in Fig. 12, and the application of this lever I have shown in detail in Figs. 3 and 4. I provide one of the standards of the arch S with lugs 58, in which I procure an angle-shaped lever 59, the horizontal extending portion of which I connect to the core of the solenoid and the vertical extending portion of which I provide with an extending arm 60, upon which is se- A log 49 is secured IIO cured an adjustable weight 61, and also provide a light weight 62 on the lower end of the vertical portion of said angle-shaped lever. These weights being therefore oppositely disposed upon the lever control the same and perform the same functions through the lever as are performed by such a dash-pot as is common in electric'arc lamps.

The operation of the aforedescribed mechanism may be given as follows: Upon the switch being moved to the position shown in dotted lines in Fig. (3 of the drawings, so that the current will be turned on, the consequent energizing of the solenoid 3 causes the core thereof to be drawn downwardly, moving the cross-head 4, the rods 5, and the levers 6 in the same direction. This movement of these parts of the mechanism causes the portions 37 of the lever to be forced outwardly, thus forein the carbon-holders also in the same direction. Upon the return upward movement of these portions, caused by the suction of the dash-pot, the parts 37 of the carbon-holders 39 will be moving inwardly, and consequently move the carbon-rod 41, gradually feeding the two rods'together to retain the constant arc.

During the outward movement of the parts 37 the levers 42 are also moved outward, but

-at a slower speed, on account of their greater length, thus causing the carbon-rods to attempt to slide outward through the disks 47; but these disks are so slanting that their sharp ed gesbite and hold the carbon-rods while the carbon-holders slide over them to take up their engagement at a point farther to the rear. Du ring the forwardmovement the parts 37 again move faster than the levers 42; but this time the disks 47 slant in such a position as to freely slide over the carbon-rods and take up their engagement nearer the carbonholders.

Among the advantages of my construction is that of obtaining by the horizontal position of the carbon-rods a perfectly-shadowless lamp and the retention at all times of a perfect and equal feed, which will retain the points of the carbons in engagement with each other.

The feeding mechanism,as will be observed, is extremely simple in its construction and will be more durable than a spring and considerably less liable to become disarranged or out of order.

The advantages of such'a construction for a stand arc-lamp will be readily apparent,

as it will be observed that the same may be placed at a perfectly-horizontal position or inclined to reflect the light in any direction desired.

In Figs. 14 and 15 I have shown a concaveconvex flexible washer 63, which is provided with a central aperture 64 to receive the carbon-rod. This Washer 63 is attached to the 1. In a device of the character described, a

lever suitably fulcrumed, a carbon-holder carried by the lever, a second lever fulcrumed to the first-named lever and having one end slidably supported beyond the fulcrum of the first-named lever, a clutch on the other end of the second lever adapted to engage a carbon-rod carried by the carbon-holder when moving in one direction, substantially as described.

2. In a device of the character described, a lever suitably fulcrumed, a second lever fulcrumed thereto, a carbon-holder carried by the first-named lever, a clutch on the second lever and means for causing the carbon-holder to move faster than the clutch, as and for the purpose described.

3. In a device of the character described, a frame, lever suitably fulcrumed therein, carbon-holders carried by the levers, clutch-1evers fulcrumed to said levers, standards on the frame through which the upper ends of the clutch-levers are slidably supported beyond the fulcrums of the levers, clutches on the lower ends of the clutch-levers adapted to engage carbon-rods carried by the carbonholders and a solenoid in an electrical circuit with the carbon-rods and adapted to operate the levers, as and for the purpose described.

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

CHRISTIAN TEPEL. Witnesses:

J OHN NOLAND, H. ,H. PATTERSON.

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