US576802A - blurlin - Google Patents

Description

3 Sheets-Sheet; 2.

(No Model.)

H BAURLIN ELECTRIC ARU LAMP.

No. 576,802. Patented Feb. 9,1897.

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ELECTRIC ARC LAMP. N0. 576,802. Patented Feb. 9, 1897.

' filial-nay UNITED STATES PATENT OEEIcE,

HERMANN BAURLIN, OF AARBURG, SWITZERLAND.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent N0. 5'? 6,802, dated February 9, 1897.

Application filed May 11, 1896. Serial No. 691,120. (No model.)

To all whom, it may concern.-

Be it known that I, HERMANN BAURLIN, a citizen of Switzerland, and a resident of Aarburg, in the canton of Aargau, Switzerland, have invented certain new and useful Improvements in Regulators for Electric-Arc Lamps, of which the following is a specification.

My invention relates to an improved mechanism for regulating electric-arc lamps, and especially to that kind of regulating mechanism where the regulating electromagnet is excited by a shunt-current. The arrangement provided for this purpose is fully and clearly described in the accompanying drawings, in whichv Figure 1 is a central vertical section through a complete arc-lamp provided with the new regulating device. Fig. 2 is a central vertical section at right angles to that of Fig. 1. Fig. 3 is a plan view of the lamp with the cap removed, and Figs. 4 to 13 are details of various parts of the lamp.

The cylindrical sheet-metal casing A carries at its lower end the reflector B, and is also fixed by screws to to a ring-shaped bottom 0, having a diametrical cross-piece C, said ring being connected by the strips 0 with the plate D, upon which the regulating mechanism is mounted and which is covered by a cap E, fastened to the circumference of plate D by screws 6.

Upon the plate D is mounted a horseshoe electromagnet F, whose armature G consists of two metal plates g g, connected by staybolts g g g and a cross-piece 9 said armature being pivoted between two centeringscrews d d, supported by the pins d (1. Each of the plates g has at its extremity opposite to the cores of the magneta soft-iron piece f, serving as the armature proper, to be acted upon by the electromagnet. The pieces ff are connected by a cross-bar f, carrying in its middle part a rod f jointed to the piston 7L, which fits into a cylinder 7t, this arrangement serving as an air-cushion brake or damper. To the other extremity of plates 9 g is attached a spiral spring L by means of the pin 9. Said spring, being fastened also to the fixed plate D, tends to keep the other extremity of the plates g g and the armaturepiecesffat a distance from the-electromagnet.

Between the side plates g g, forming a rocking lever, is placed a clockwork operated by the weight M, suspended on a cord m. This cord passes over the larger pulley m and a smaller one m and connects to the end of the rod N, guided by a tube N which is fastened to but insulated from the cross-piece O of the ring 0 by means of abushing 0 This rod N serves as holder for the lower carbon of the arc-lamp, for which purpose it is provided with a clamp N, fixed to the lower end of rod N. The top of this rod is guided by a cross-head N insulated from the rod N by a bushing N and passing by means of the slots n n between the guiding-bars n M, connecting the base-ring O and the plate D. In the same manner are provided parallel to the vertical axis of the weight M, to the right and left, the guiding-bars M M, passing through suitable holes or slots of the pins M M in the weight M, which latter carries a clamp M secured in an insulating-bushing M therein to hold the upper carbon and insulate it from the mechanism for regulating the feed adjustment of the carbons.

To the clamp M" and to the top of the bar N are attached the insulated conducting-Wires 0 0 in a suitable manner and are also affixed to the terminals o 0 from which also the shunt-circuit branches 01?, passing around the coils of the electromagnet, as will be hereinafter described. This circuit is indicated by the wires 1) 19, Fig. 3. The terminals 0 0 serve also for connection with an external circuit, from which the lamp is to derive its current. For engagement of the clockwork there is provided on the axis of rope-pulley m a pinion Q, geared to a train of gear-wheels, the last one having an escapement-wheel L, which gears into the escapement-wheel Q fixed on the axis R, the latter being provided with a double horizontal pendulum R, the said axis R also having a friction-disk R to which the brake is applied.

To the angular cross-piece g is fixed another cross-plate g upon the horizontal part of which is screwed an auxiliary armature S, composed of the strip 8 and the soft-iron cross-piece S. This auxiliary armature is not rigidly fixed to the plate g but an inclination of the end upon which S is fixed, caused by attraction of the magnet F for the soft-iron piece b", is made possible by the elasticity of the cross-piece 9 which elasticity tends to keep the auxiliary armature at a dis tance from the electromagnet. The other extremity of the auxiliary armature is provided with a set-screw T, whose point is pressed down upon the friction-disk R The set-screw point T, iixed in a support U, attached to the one side plate 9, serves to limit the upward motion of the armature The apparatus works as follows: The carbons being normally separated, as described, the current is sent into the two wires 0 o. The potential dil'ierence between the two carbons being su iiicientlygreat. the magnetic coils will be strongly excited by the shunt-circuit, so that the armature, by means of its pole-pieces or its ends ff, is attracted an d turned around its fulcrum-points (Z (I, by which means the carbonmints are brought together; butas the softiron pieces ff now form part of the magnetic cores they will also attract the auxiliary armature S, whose opposite extremity will thereby be lifted, the set-screw T raised, and the :iriction-disk it released. lhe weight M will therefore be allowed to sink down like an ordinary clock-weight and its descending movement exactly regulated by the escapement and the pendulum R, above described. At the same time the lower carbon is raised by the eloclnvork, and the upward pull of cord m and their two ends will approach n11- til they will come in contact with one another. The potential dillerence between the carbons will new fall oil and the shunt-current in the magnetic coils of I will also be diminished, in consequence of which the spring L will draw back the armature and turn it around the fulcrum (Z (l, and the auxiliary armature S will also again press with its extremity against the friction-d isk R and hold the clockwork and carbons steady.

\Vhen the armature G is turned by the spring L and the top carbon is raised, the are will appear between the carbons. Consequently the shunt-current is increased again and the main armature is attracted by the magnet; but at first the shunt-current will not be strong enough to attract the auxiliary armature. Moreover, the attraction of the main armature will not be a sudden one, but

the approach of the armature to the cores will take place gradually and proportionally to the length of the are and the increase of potential difference and ot' sluint-cnrrent hereby caused. 11, finally, the lat-tor becomes intense enough, the auxiliary armatu re is also attracted, the clockwork is released, and the distance between the carbons hereby regulated until the potential difference, and there fore also the shunt-current, is diminished.

The clockwork is wound up by drawing down the carbon-holder N, whereby the weight M is lifted, which is done "whenever carbrms are put into the holders.

It is obvious that many slight alteraiitms may be made in the parts and combinations of parts hereinbelore described, and hence .i would have it understood that I do not strictly confine myself to the specific construction shown.

I claim as my intention and desire to so cure by Letters Patent- 1. In an electric-are lamp the combination of an clectromagnet included in a shunt-circuit of a main armature having side plates and a clockwork supported thereon carrying a ribbon from which the carbon is supported, a horizontal pendulum, a .Lriction-disk upon the axis thereof, and an auxiliary armature elasticallysupported upon the main armature controlled by said electromagnct and having an adjustable break-screw to press upon said friction-disk, substantially as described.

2. In an electric-arc lamp, the combination with the lamp-frame comgrising a reflector ring-shaped bottom C, an. upper plate I), a shunt-magnet armature and gear supported upon said plate, a gem-operating weight M, insulated from carrying the upper carbon and guided by wires M, a rod N, supporting the lOWGF-Cttl'lDOh holder and insulated from the frame and guide-wires )l and '12? extending between the bottom 0 and plate 1), substan tially as described.

In testimony that I claim the foregoing as my invention I have signed my name in pres ence of two subscribing witnesses.

IIERMANN llrtllftlplh'.

Witnesses:

ROBERT ANes'r, A. OnwIx MEYER.

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