US371524A - Elias smith - Google Patents

Description

(No Model.)

E.- SMITH.

INDUGTIUN ooIL.

Patented Oct. 11, 1887.,

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UNITED STATES PATENT OFFICE.

ELIAS SMITH, OF PEORIA, ILLINOIS, ASSIGNOR OF ONE-HALF TO FRED KIMBLE, OF SAME PLACE.

INDUCTION-COIL.

.SPECIFICATION forming part of Letters Patent No. 371,524, dated Cctober l1, 1887.

Application filed July 1, 1887. Serial No. 243,109.

To aZZ whom t may concern.;

Be it known that I, ELIAS SMITH, a citizen of theUnited States, residing at Peoria, in the county of Peoria and State of Illinois, have invented certain new and useful Improvements in Electrical Apparatus for Dental Purposes; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an electrical apparatus and its application to dentistry, and has for its object to produce means whereby a current of electricity may be'used with advantage to deaden the pain caused by dental operations. s

The invention further has for its object to produce means whereby the current readily may be regulated, and whereby, also, the current may be cut oft' instantly by the operator when desired.

Vith these objects in view the invention consists in the aggroupments of parts now to be described, and particularly pointed out in the claims.

I have illustrated the invention in the accompanying drawings, in which Figure I is a perspective view ot the exterior of thev case which I employ to hold the batteries, 85e., employed in my invention. Fig. 2 is a side elevation ofthe interior ot the case, showing the `parts in position, one side of the case being broken away. Fig. 3 is a detail View showing the manner of mounting and adjusting the armature of the induction-coil. Fig. 4 is a view showing the inner face of the board or plate upon which the induction-coil is mounted, illustrating the connections between the induction-coil and the discharges; and Figs. 5 and 6 represent modified forms of tightening devices designed to be applied to the spring carrying the armature of the induction- (No model.)

B. l/Vithin this case A is mounted one or more cells, O C, which may be the well-known carbon or any other desirable cell. The elements of these cells are, for convenience in raising them from the jars, connected to a transverse bar, D, which is provided with a vertical rod, E, projecting through the top of the shell or ease, so that by raising or lowering the rod the elements are Withdrawn from or lowered into the liquid in the jars. The cells are connected to the binding-posts E F, Xed to aboard, G, upon which the inductioncoil is mounted. The post F is connected by means of the wire H to the adjustable contactscrew I, against which bears the spring J, and the binding-post E is suitably connected with the primary of the induction-Coil. The purpose of this screw I is, in connection with the spring J, to break and make the primary circuit, andthe frequency ofthe impulsesis regulated by the tension ot' spring J.

The armature K of the y induction-coil is mounted at approximately the center ot' the spring J, so that the vibrations of the armature are varied by the tension of the spring. The spring is mounted in projecting arms L M, projecting from a plate or bar, N, mounted in suitablerelationtotheinduction-coil. Oneend of the spring is connected vpermanently to the arm L, and the other end is connected toa lever, O, mounted on the arm M.

The lever O is movable and is manipulated yby the screw P, which passes through the lever O and bears against the arm M, so that by turning the screw the lever is moved away from the arm and any desired amount of tension is imposed upon the spring, and thus the rapidity with which the armature vibrates is regulated.

Instead of the means for tightening the spring shown in Fig. 3, I' may employ one of the devices shown in Figs. 5 and 6 of the drawings.

In the form of tightener shown in Fig. 5 one end of the spring is permanently connected to the arm L, and the other end is attached to a screw which passes through the arm M, so that by turning the screw bac-k and forth tension may be put upon or taken off the spring.

In the form shown in Fig. 6 the free end of 1. In an 'electrical apparatus for dental purthe spring passes through the arm M, and is poses, a generator, an induction-coil having connected by a pin to an eccentric which bears against the arm, and by which the spring may be tightened in an obvious manner.

The wires from the secondary of the ind uctioncoil are connected, respectively, tothe' binding-posts Q and R, and the post Q is connected to the post S on the top of the case.

The core Sl of the induction-coil projects through the shell of the apparatus, as shown, for convenience in manipulating it.

The post R :is connected with a spring, U, ixed, preferably, at about the bottom of the case. One end of this spring is fixed permanently, andthe free end bears, when in its normal position, against a metal plate, V. To the outside of the case is pivoted alever, W, provided with a knob or projection which projects through an opening in the side of the case the box or case rests upon the loor it may be pressed by the foot of the operator, whether he be standing on the ooror on a stool. Pressure on the lever W will separate the spring U and metal plate, and thus break the circuit. The plate V is connected to a post, T, fixed to the outside of the boxor case.

The cylindersor electrodes, designed to be held in the hands of the person tobe operated upon are connected, respectively, to the binding-posts T and S. The postT is connected with a binding-post, Y, by means of a wire, Z, and to this postis connected a pair of forceps or other instruments to be used in operating upon the patient.

In using the apparatus the electrodes are grasped by the patient and the elements of the batteries are lowered into the jars, thereby generating a current of electricity whichpasses through the circuit completed by the person holding the electrodes. When the forceps which are connected, asA described, with the post 'Y are brought into contactwith the tooth, a circuit through the forceps and tooth is completed, thus causing a portion of the current formerly passing through the hands holding its armature mounted on a spring fast at 011e/y end and secured at the other to a lever and set-screw, whereby the rapidity of the elec,`

' trical impulses allowed to pass through the iuduction-coil is regulated, and the electrodes, substantially as described.

4. In an electrical apparatus for dental purposes, a generator, au induction-coil, the electrodes, and the Wire from one of the dischargeposts connected with a pair of forcepsbr the like, substantially as described.

5. In an electrical apparatus for dental purposes, the elongated spring U, forminga portion ofthe circuit, and the elongated lever W, mounted on the exterior of the case, and having a projection extending through the case and bearing against Vthe spring, substantiallyd as described.

6. The combination, in an electrical apparatus for dental purposes, of one or more batterycells, an 4induction-coil having its armature mounted on a spring supported at bot-h ends and provided with a tension device, the electrodes, and the forceps or other instrument attached to one of the electrodes, substantially as described.

7. The combination, in an electrical apparatus, of one or more cells, an inductioncoil having its armature mounted on a spring supported at both ends and provided with-a tension device, the elongated spring forming Vtnesses:

DAVID H. MEAD, A. KEITHLEY.

ELIAS SMITH.

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