US555706A

US555706A - Erwin la yens

Info

Publication number: US555706A
Authority: US
Publication date: 1896-03-03
Anticipated expiration: 1913-03-03

Description

' (No Model.)

E. LAVENS.

ELEGTRIG ARG LAMP.

No, 555,706. Patented Mar. 3, 1896.

mil-l l' Mmm?? UNITED raras yATENT OFFICE.

FRVIN LAVENS, OF NEV YORK, N. Y., ASSIGNOR TO THE GENERAL INCANDESOENT ARO LIGHT COMPANY, OF. SAME PLACE.

ELECTRIC-ARC LAM P.

SPECIFICATION forming part of Letters Patent No. 555,706, dated March 3, 1896.

Application filed May 2S, 1895. Serial Noi 550,358. (No model.)

To all whom it may concern.-

Be it known that I, ERWIN LAvnNs, a citizen of the United States, residing at the city, county, and State of New York, have invented Improvements in Electric Arc Lamps, of which the following is a specification.

My invention relates to electric-arc lamps; and it consists of the mechanism employed for establishing and maintaining the lightarc between the carbons.

The object of my invention is to simplify the construction of such lamps by decreasing the number of operative parts.

In the accompanying drawings, which will serve to illustrate my invention, Figure I is a side view of a portion of a lamp embodying my invention. Fig. 2 is an end view at the right of Fig. I. Fig. 3 is a plan view and partial section looking down with top plate removed. Figs. 4 and 5 are detail views of the clutch mechanism, taken on the line oc m of Fig. 2.

Similar letters of reference indicate like parts.

A is a base-plate; B, top plate; O and D, side plates. These plates are suitably secured together and serve to support the mechanism of the lamp.

E is a shunt-magnet, which is shown as divided into two parts E F2, connected by means of a yoke F.

G is a shaft mounted on the adjustable pivots H H', located, respectively, in the side plates C and D. To the shaft is secured a wheel or drum I, which is in operative engagement with carbon-support J The carbon-support is, in the present instance, a rod-like support and is adapted to move lengthwise through and be guided by the edges of the openings K in the plates A and B. I have shown the wheel I formed as a pinion and the carbonsupport as a rod provided with a rack J on its inner side.

I wish it under-stood that I do not limit myself to a rack-and-pinion engagement between wheel I and carbon-support J, as I may use a iiexible band or other connection, as more commonly employed in similar lamps, and which are well known to those skilled in the use and manufacture of such lamps.

L is a clutch-wheel mounted on shaft G and having its peripheral edge formed as a flange L. It will be observed that as the wheel I and clutch-wheel L are fixedly mounted on shaft G the weight of the carbon-support J will, unless resisted, rotate the shaft and wheels to the right as it descends or to the left when elevated. Mounted on the pivots I'I H' is the armature M, which is formed of the side arms N O and head I. The arm N, Figs. 2 and 3, is carried upward, and when the armature drops bears against an adjustable screw-stop N, carried in an offset N2 of the side plate, D. By adjusting the stop N the distance which the head P of the armature will drop may be previously determined.

The arm O, Figs. l and 4, carries a dog or dogs Q, which in the present instance consist of a bar slotted transversely at its outer end to include the fiange L of the clutch-wheel L and slotted longitudinally at its inner end to take over a pin R. Fastened at one end to the dog and at the opposite end to an extension O of arm O is a helical spring. This spring, owing to the fact that the dog has a different center of motion from that of the clutch-wheel, tends to cause the end of the dog to describe and arc which would cut the circle described by the periphery of the clutch-wheel. As a consequence the dog or dogs grip the outer periphery of the clutch-wheel. The action of the spring or springs is manifestly aided by the weight of the carbon-support. An upward movement of the carbon-support, it will be seen, tends to slacken the bite of the dogs and a free upward movement will be permitted.

The end P of the armature is arranged to carry weights T, which may be adjusted for variations of electrical pressure.

From the foregoing description it will be observed that the armature M,considered as a whole, forms a lever of the rst order. The carbon-support is carried on the short end of the lever and is overbalanced by the weights of the long arm of the lever. Normally, therefore, the armature raises the carbonsupport and separates the carbons, which is a requisite-mz'. c. lamps of the type described. U represents an arm pivoted at I-I and de- IOO signed to vbe swung upon its fulcrum-point and then secured in the adjusted position.

For this purpose I may provide a clampingscrew U', secured to the arm U and moving in an arc-shaped slot U2 on the side plate C. rlhe free sides of the arm carry stops V V', projecting into the path of J[he dogs Q, and which serve when the dogs bear against them to push the outer end of the dogs backward to release the clutch-wheel Il. Preferably, one of the stops V' is provided with an adjustable screw V2. 'By means of the arm U and screw V2 the feeding movement of the carbon-support may be adjusted and determined.

The operation of the mechanism may be described as follows: XVhen the current is turned on the magnet overcomes the weight of the armature, the shaft Gr is rotated to the right, the dogs Q strike the stops, the clutchwheel is released and the carbon support drops, and the arc carbons are brought into opposition. Immediately the armature drops and the carbon-support is raised to strike the arc. As the resistance of the arc increases the armature is gradually raised, and, as before, the carbon-support is lowered to compensate for consumpt-ion in the are and to maintain the lengt-h of the arc.

I claim as my invention* l. In an arc lamp, the combination of a movable carbon-support, a shaft carrying a wheel or drum from which the carbon-support is suspended, a clutch-wheel mounted on said shaft, a gravitally-acting armature which normally overcomes the weight of the carbonsupport, a dog or dogs carried by said armature and moving with said clutch-wheel, an adjustable stop in the path of said dog or dogs, and a magnet for moving said armature, whereby said dog` or dogs are brought into engagement with said stop and thereby :release the clutch when the length of the are exceeds a predetermined limit, substantially as specified.

2. In an arc lamp, the combination of a movable carbon-support, a shaft carrying a wheel or drum from which the carbon-support is suspended, a clutch-wheel mounted on said shaft, a gravitally-actin g armature which normally overcomes the weight of the carbonsupport, a dog or dogs so pivoted as to move eccentrically to the axis of said armature, a magnet for moving said armature, and a stop against which the dog or dogs strike when the armature in its movement reaches a predetermined point, thereby acting to release the carbon-support, and permit the upper carbon to feed, substantially as specified.

In an arclamp, the combination of a movable carbon-support, a shaft carrying a wheel or drum from which said carbon-support is suspended, a clutch-wheel mounted on said shaft, a gravitally-actin g armature which normally overcomes the weight of the carbonsupport, said armature so pivoted as to have the same axis of rotation as the shaft on which the clutch-wheel is mounted, but arranged to move independently of said shaft, a dog or dogs pivoted upon said armature, and in such position that their pivotal points will, when the armature is actuated, move concentric to the armature-pivot, a magnet for moving said armature, and a stop in the path of said dog or dogs, whereby free 'upward movement of the carbon-support is permitted, a gradual downward movement of the carbon-support is effected to compensate for the consumption in the arc, and a quick downward movement when the length of the arc exceeds a prede termined limit.

4:. In an are lamp, the combination of a movable carbon-support, a shaft carrying a wheel or drum from which the carbol'i-suplmrt is suspended, a clutch-wheel mounted on said shaft, a gravitallyactin g armature which normally overcomes the weight of the carbonsupport, having the same axis of rotation as said shaft, but independent thereof, and a breaking device carried by, and moving with the armature which normally acts upon said clutch-wheel to prevent the downward movement of the carbon-support, but which permits free upward movement of said support, and a magnet for moving said armature and break device.

5. In an arc lamp, the combination of the 9 movable carbon-support J, shaft G, wheel or drum I, clutch-wheel L, armature M, dog or dogs Q, and adjustable stop U, substantially as specified.

In testimony whereof I at'lix my signature in the. presence of two witnesses.

ERW 1N LIXVIGNS. lVitnesses:

GEO. ll. BENJAMIN, PAUL N. ',VURNER.

IOO