US521362A - Electric-arc light for magic lanterns - Google Patents

Description

(No Model) I G. BESELER. ELECTRIC ARC LIGHT FOR MAGIC LANTERNS. No. 521,362.

Patented June 12, 1894.

l/VVENIOH A TTOHNE YS.

UNITED STATES PATENT OFFICE.

CHARLES BESELER, OF JERSEY CITY, NEW JERSEY.

ELECTRIC-ARC LIGHT FOR MAGIC LANTERNS.

SPECIFICATION forming part of Letters Patent No. 521,362, dated June 12, 1894.

Application filed March I6, 1894 Serial No. 503,865. (No model.)

To aZZ whom it may concern:

Be it known that I, CHARLES BESELER, of Jersey City, in the county of vHudson and State of New Jersey, have invented a new and Improved Electric-Arc Light for Magic Lanterns, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved electric arc lightfor magic lanterns, which is simple and durable in construction, and arranged in such a manner as to enable the operator to conveniently and accurately adjust the light relative to the condenser of the magic lantern, to produce the best results on the screen.

The invention consists of certain parts and details, and combinations of the same, as will be hereinafter described and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming apart of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figurel is a side elevation of the improvement as applied. Fig. 2 is an enlarged side elevation of the improvement. Fig. 3 is an enlarged end elevation of the raising and lowering device for the casing. Fig. 4 is a sectional side elevation of the same. Fig. 5 is an enlarged sectional side elevation of the adjusting device for the upper carbon; and Fig. 6 is a plan View of part of the casing.

The magic lantern A of any approved construction, is mounted in the usual manner on the standards B erected on a base 0, and the said standards support rearwardly extending guide rods D on which are fitted to slide the cross heads E, connected with each other by the usual cross bar E, as plainly shown in Fig. 3. The cross heads E support posts E on which are fitted to slide vertically the sleeves F connected with each other by a cross bar F on which is pivoted the are light casing F containing the usual compensating mechanism for the carbons, the saidoasing being also provided with binding posts for making the necessary connection with the conducting wires for the electricity. The compensating mechanism is provided with the usual rack G mounted to slide in the easing F and carrying at its upper end a tube H, in which is fitted to slide longitudinally a rod I, by means of a screw rod H mounted to rotate in the said tube H and screwing in the inner end of the said rod I. The outer end of the rod I is provided with a clamp I for the upper carbon J, and the said rod is prevented from turning bya pin I projecting from the rod, and engaging a longitudinallyextending slot H formed in the tube H, as plainly illustrated in Fig. 5. V

In alignment with the upper carbon J is the lower carbon J held in a socket K by means of said screws K, the said socket being provided with an arm K mounted to swing loosely on a stud K projecting downwardly from the front end of the casing F, as plainly shown in Figs. 1 and 2. g

In order to raise and lower the casingF on the posts E I provide a bell crank lever L havingthe front end of its arm L curved and forked to engage the under side of the cross' piece F carrying the casing F, as previously described. The bell crank lever L is fulcrumed at L on a projection E supported by arms E from the cross heads E, and in the said projection E screws a screw rod N engaging the other arm L of the bell crank lever L, see Fig. 4. Now, it will be seen that by turning the screw rod N in one direction it screws inward and presses on the arm L of the bell crank lever, so as to swing the latter upward in the direction of the arrow a whereby the other arm L on account of engaging the cross piece F of the casing F causes the latter to slide upward on the standards E By turning the screw rod N in the opposite direction or rearward, the bell crank lever L will swing downward in the inverse direction of the arrow at, by the weightof the casing F then sliding on the posts E The casing F, as previously mentioned, is pivoted on the cross piece F and on the said casing near one rear corner is formed a projecting lip F (see Fig. 6) having a segmental slot F the center of which is the pivot connecting the casing F with the cross piece F Through this segmental slot F passes a set screw 0 screwing in a projection F forming part of the cross piece F so that by screwing up the set screw the lip F is clamped to the projection F so that the casing F cannot turn on its pivot on the cross piece F By unscrewing the set screw the casingF may be swung to the right or left, so that the contacting point of the carbons J, J is brought into a central position relative to the condenser A' of the magic lantern A. On the front end of the casing F is held a shield P made of asbestus or other suitable material so as to shield the casing F and also form a sort of reflector for the are light produced between the carbons J, J, directly in front of the said shield.

It will be seen that by the arrangement described, the casing F may be readily raised or lowered and turned sidewise, so as to bring the contacting point of the carbons J and J into the proper central position relative to the center of the condenser A. It will also be seen that the upper carbon J can be 1ongitudinally adjusted so as to hold it in proper relative relation to the lower carbon J fixed in the socket K, as the latter being mounted on the arm K swinging from the stud K enables the operator to adjust the said carbon J relative to the center of the condenser A whenever necessary.

By having the entire are light arranged in such a manner that it can be longitudinally adjusted on the rods D, the contact point between the carbons J,J, can be moved nearer to or farther from the condenser A, as the case may require.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. An electric are light for magic lanterns, comprising a casing mounted to slide vertically and supporting the carbons, a bell crank lever engaging with one arm the said casin g,

and means for imparting a swinging motion to the said bell crank lever to raise or lower comprising longitudinallyadjustable posts,

connected sleeves fitted to slide on the said posts, a casing pivoted on the cross bar connecting the said sleeves with each other, a

bell crank lever engaging the said cross bar,

and a screw rod engaging the said bell crank lever to raise or lower the said casing, substantially as shown and described.

3. An electric are light for magic lanterns, comprising sleeves fitted to slide vertically, a cross bar for connecting the sleeves with each other, a casing pivoted on the said cross bar and provided with a lip having a slot, and a set screw screwing in a projection from the said cross bar and engaging the said slot in the lip, substantially as shown and described.

4. An electric are light for magic lanterns,- provided with a carbon carrier, comprisinga tube supported on a rack,a rod fitted to slide in the said tube and provided with a clamp for the carbon, and a screw rod turning in the said tube and screwing in the said rod, substantially as shown and described.

5. An electric are light for magic lanterns, provided with a carbon carrier, comprising a tube supported on a rack, a rod fitted to slide in the said tube and provided with a clamp for the carbon, a screw rod turning in the said tube and screwing in the said rod, and a pin projecting from the said rod and engaging a longitudinal slot in the said tube to prevent the rod from turning,substantially as shown and described.

CHARLES BESELER.

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