US533100A - Electric-arc lamp - Google Patents

Description

(No Model.) 3 Sheets-Sheet H. O. SWOBODA.

ELECTRIC ARC LAMP.

No. 533,100. Patented Ja,11:29,1895,

3 SheetsSheet 2.

(No Model.)

H. O. SWOBODA.

ELECTRIC ARC LAMP.

Patented Jan; 29, 1895.

(No Model.) 3 Sheets-Sheet 3.

H. O. SWOBODA.

ELECTRIC ARC LAMP.

No. 533,100. Patented Jan. 29,1895.

INVENTOR A; ATTORNEY UNITED STATES PATENT QFFICE.

HANS OTTO SWOBODA, OF NEIV YORK, N. Y., ASSIGNOR TO THE GENERAL a INOANDESOENT ARC LIGHT COMPANY, OF NEW YORK.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 533,100, dated January 29, 1895. Application filed March 2, 1894- Serial No, 502,047. (No modeL) To all whom it may concern;

Be it known that I, HANS Orrro SWOBODA, a subject of the Emperor of Germany, residing in the city of New York, in the county and State of New York, have invented a certain new and useful Improvement in Electric- Arc Lamps, of which the following is a specification.

I will describe a lamp embodying my invention and then point out the novel features in claims.

In the accompanying drawings, Figure 1 is a side elevation of alamp embodying my improvement. Fig.2 is a side view of the lamp in a plane at right angles to Fig. 1. Fig. 3 is a side elevation of certain parts on the opposite side of the lamp to that which is illustrated in Fig. 1. Fig. 4 is a vertical section of an armature or core of modified construc tion. Fig. 5 is a side view of certain'parts of the lamp illustrating a modification. Fig:6 is a side view of certain parts of the lamp illustrating a modification. Fig. 7 is a top view of the body piece of a spool for a solenoid. Fig. 8 is a plan of a detachable flange for said spool. Fig. 9 is a perspective View illustrating the manner in which the detachable flange may be engaged with the body piece of the spool.

Similar letters of reference designate corresponding parts in all the figures.

As my improvement does not relate to the circuit of the lamp or to the construction of the frame, I shall not describe these features except incidentally in explaining other parts.

A A designate two rods extending from a plate A down to a holder for the lower carbon. As the latter may be of any suitable construction, I have not shown it. One of the rods A A may be hollow to receive a circuit wire B, covered with insulating material.

C designates another plate which is connected to the plate A, by means of intermediate rods, or otherwise. It is shown as hav ing a central hub in which a rod D, is fitted. The rod D may serve as a support for the lamp. I have shown the plate 0 as provided with binding screws 0' o for the.connection of the circuit or line wires leading to and from the lamp. I may add that both these binding screws are insulated from the plate 0. The wire B. is connected with the binding screw 0.

I will now particularly describe the form of lamp illustrated by Figs. 1, 2, 8 and 4.

E designates a rod which is to be provided at the lower end with a holder for the upper carbon, its office being to supportsaid carbon. It will be seen that this rod is provided with a rack e on one side and that it moves upwardly through a hole in the center of the plate A. It may be guided by a bearing in a plate F, which is mounted upon the plate A, and also by a bearing in a plate F which is supported above the plate F and connected with it by means of two vertical plates or pieces F F. This rod may also pass upwardly through the plate 0 and into the rod D, providing the latter is made tubular, which will preferably be the case. The downward movement of the rod may be limited by a stop-pin arranged in its upper portion, so that it may contact with the plate F.

\Vith the rack e of the rod E, engages a gear wheel G, which is supported in bearings with which the side pieces F F are provided. As here shown these bearings consist ofscrews passing through the side pieces and engaging with the ends of a shaft g, upon which the said gear wheel is affixed.

The shaft 9 forms a support for an oscillating frame H, here shown as consisting of two angular or L-shaped side pieces h 71 and intermediate cross-pieces or stretchers 7L3. As here shown, these side pieces are loosely mounted upon this frame and loosely mounted upon the said shaft g.

G designates a pinion affixed to a shaft g journaled in the side pieces of the frame H. On the same shaft is affixed a gear wheel G hen the rod E is moved in either direction, it will rotate the pinion G, and consequently the gear Wheel G The gear wheel G engages with a pinion G affixed to a shaft 9 which is journaled in bearings in the side pieces of the frame H. On the shaft 9 is affixed a brake wheel G and with this I combine a brake lever G having one arm which is curved to conform to the periphery of the brake wheel. If desired, one of these parts may be grooved and the other constructed to enter such groove. The brake lever G is fulcrumed by a screw or pin g to one of the side pieces of the frame H. One of the arms of the lever is connected to a spring 9 which is 5 also connected to the frame H. Of course, if

the lever is properly weighted the spring may bedispensedwith. Thespringisso combined with the lever as to apply it to the brake wheel when the frame H is in that position which it occupies when there is no current on the lamp and at such times as there is a great resistance in the arc. That end of the brake lever which acts upon the brake wheel, is shown as provided with a projection 9 which may be made in the form of an adjustable screw, engaging with a tapped hole in the end portion of said lever. The stationary frame F F F F is provided with a projection f. When the frame H rocks forward, the projection g impinges against the projection f, and thus the brake lever will be operated so as to release the brake wheel, whereupon the upper carbon may feed downwardly. W'hen the frame H is oscillated in the reverse direction, the projection will leave the projectionf, and the spring will apply the brake lever again to the brake wheel.

The frame H is connected with the core or armature J of a solenoid or magnet J. \Vhen made for an alternating current lamp this core J is composed of a number of iron wires j, insulated from each other in any snitable manner, as, for instance, by being coated or oxidized. If desired, these wires may all be surrounded by a single glass sleeve. These wiresj are fitted at their ends into cappieces j'j which may be made of insulating material or metal, but if metal is employed and the lamp is intended for an alternating current, there should be a split in each of the cap-pieces lengthwise of the core and to the center. I do not want to be limited, however, to the use of a core made in this manner, as I may use a solid iron core, or a laminated iron core. If a solid iron core is used and the lamp is employed for an alternating current, the core should be split lengthwise.

The core J works within the solenoid or magnet J, which may have a series or differential winding. This winding will be connected in the lamp circuit in any suitable manner. As here shown, one of the wires extending from the winding connects with one of the side pieces F F of the frame F F net, instead of the solenoid form, maybe em F Obviously, the horseshoe form of mag be allowed to move downward so as to lower the upper carbon. On moving down far enough, it will cause the gearing to be released, so that the rod E may feed downward.

Preferably a dash-pot K will be combined with the frame H and some stationary part of the lamp frame. 111 the present instance its cylinder is connected to an appurtenance of one of the side pieces F F of the frame F F F F, and its piston to a lateral extension on the frame H. The purpose of this dashpot is to prevent too sudden movements of the frame H.

In the form of lamp shown by Figs. 1 and 2, the circuit extends through the frame F F F F and from such frame, by means of a metal brush L, to the rod E, which carries the upper carbon.

The frame H while, generally speaking, being L-shaped as in the first described example of my improvement, may have its arm h, which extends in the main horizontally, adjustable relatively to the other arm h As here shown, both arms are loosely mounted upon the shaft g and the side pieces of the frame constituting the arm h, lap over the side pieces constituting the arm 71,2, and where the lap occurs, the side pieces constituting the arm 7i have arc-shaped slots 72. that are concentric with the shaft 9 and are combined with clamping screws 7L5. By this construction of the L shaped frame ll, provision is afforded for adjusting its two arms relatively to each other at different angles, and thus the lamp may be varied to suit different currents, for, obviously, the more the upright arm on the L-shaped frame H is adjusted outwardly, or, in other words, toward a horizontal position, the greater effect will its weight have in opposing the magnet or solenoid J.

For connecting the frame H, with tho armature or core of the magnet or solenoid, I use a link L, having a pivotal connection at one end with the frame H, and provided with a longitudinal row of holes which afford provision for engaging the link at different points in its length, with the armature or core, by means of a transverse pin passing through a hole in the armature or core and one of the holes in the link. By changing the point of connection between the link and the core, provision is afforded for tilting the frame II more or less, to vary the opposing force which its weight offers to the magnet or solenoid.

It is not necessary to make the frame H adj ustable in itself, if provision is afforded for adjusting its connection with the armature or core.

Turning now to Fig. 5, it is only necessary to say that it illustrates the substitution for the rack bar and gear wheel E, G of a spring barrel M, having its periphery constructed on the principle of a fusee barrel, or, in other words, with a groove of varying diameter, so as to equalize the varying action of the spring, and a cord or strap wound upon said spring IIO barrel and connected with a carbon support or carrier, which will be provided with the holder for the upper carbon. This carrier is fitted to any suitable frame Work, so as to be properly guided in its movements. It is intended to be heavy enough to overcome the tension of the spring barrel, so that whenever it is unrestrained it will descend.

In Fig. 6, I have shown two movable carbon supports or carriers N N which will be provided with holders for upper and lower carbons. These carriers are fitted to any suit able frame-work N, so as to be properly guidedin their movements. N is a guard or equivalen t device, connected at the ends to the two carriers N N and intermediately passed around a wheel N The upper carbon carrier N is intended to be heavier than the lower, so that whenever it is unrestrained it will descend and by its descent raise the lower carbon. The Wheel N is intended to be mounted upon a shaft corresponding to the shaft 9 in the lamps already described, and to be controlled in its movements by a train of wheels such as I have illustrated in the two different examples of my improvement shown by Figs. 1, 2, 3 and 4, in connection with a magnet or solenoid with an armature or core.

The drum which I have described in connection with Fig. 6, is to all intents and purposes, a wheel which is connected with a movable support for a carbon and hence it corresponds in effect with the wheel G, illustrated in the first and second examples of my improvement. The wheel of Fig. 7 also corresponds with the said drum and with the said wheel G, in the sense of being a wheel which is connected with a movable support for a carbon. Each of these devices may be designated as a device for controlling a movable support for a carbon.

I have shown the solenoid as provided with a spool S, having a body 8 made of metal, with flanges s, s at the top and bottom. When the lamp is intended for an alternating current the body of this spool will be split lengthwise from end to end, in the manner represented at the lower portion in Fig. 2. In addition to the flanges 8' the spool may have large flanges of insulating material 8 s, and these may he slipped over the up per flange 8, if such upper flange be notched in the manner represented in Fig. 7 and the flanges are notched in the manner represented in Fig.8, for then each flange may be slipped over the flange s in the manner indicated in Fig. 9.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In an arc lamp, the combination of a movable carbon support, stationary supporting pieces, a tilting frame pivotally supported in said stationary supporting pieces, a pivoted arm for moving said tilting frame, ad justably attached thereto and having its pivotal axis identical with the axis of movement of said tilting frame, a brake and brake wheel carried by said tiltingframe and moving with the latter when the same is moved, mechanism connecting the brake wheel with the movable carbon support, a magnet or solenoid for moving said tilting frame by means of said adjustable arm, and a fixed stop for coacting with an adjustable extension of said brake, substantially as specified.

2. In an arc lamp, the combination of a movable carbon support, a device for controlling the movement of such support, a tilting frame, and a solenoid whose core controls the movement of the tilting frame, said solenoid including a spool having a body portion and removable end flanges, said body portion be ing so formed as to permit the suitably notched flanges to he slipped on, and locked on a partial rotation of the same, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

IIANS OTTO SWOBODA.

Witnesses:

EDWIN H. BROWN, ANTHONY GREF.

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