US269794A - And emerson w - Google Patents

Description

(No Model.)

J. KIDDER, Deod.

F. M. KIDDER & E. W. KEYES, Administrators.

ELEGTRO MEDICAL INDUCTION COIL.

No. 269,794. Patented Dec. 26, 1882.

WITNESSES:

\IEKM ATTORNEY N. Pucks Pmmmw. Minn, n c.

UNITED STATES FRANCIS M. KIDDER, OF NEXV YORK, AND EMERSON WV. KEYES, F BROOK- LYN, N. Y., ADMINISTRATORS OF JEROME KIDDER, DECEASED.

SPECIFICATION forming part of Letters Patent No. 269,794, dated December 26, 1882,

Application filed August 9, 1882. (No model.)

To all whom n3 may concern:

Be i t known that we, FRANCIS M. KIDDER and EMERSON W. KEYES, citizens of the United States, residing at New York city, county of 5 New York and State of New York, and at :irooklyn, in the county of Kings and State of New York, respectively, administrators of the estate of JEROME KiDDER, M. 1)., late a citizen of the city, county, and State of New York, I a deceased, (as by reference to the duly certified copy of letters of administration hereto an nexed will more fully appear,) state that the said JEROME KlDDER, M. D., invented new and useful Improvements in Electro-M agnetic Machines, of which the following is a specification.

This invention relates to electromagnetic machines for remedial or other uses or purposes; and it consists in certain novel combi- 2o nationofparts,hereinafterdescribed,operating to automatically produce an intermittent or other current from a battery or other source of electricity.

This invention is illustrated in the accom- 2 panying drawings, in which Figure l is a perspective view, showing it applied to a machine containing also various other features now in general use. Figs. 2, 3, and 4 are a detail view of parts.

Similar letters of rel'eience indicate corresponding parts.

The letterA designates a case inclosing the operative parts of the machine, consisting, among other things, of binding-posts B, for receiving the electrical conductors.

The letter C denotes a lever, which has its fulcrum on pivots D, arranged in an insulated post, E, and which forms a commutator, as hereinafter explained. This lever carries a 40 spring, F, constituting a circuit-closer. such spring being fastened by rivets orother suitable means, and opposite to the free end of the spring is located an electrode, Gr, consisting of a screw arranged in a post, G, as clearly shown 5 in Fig. 4. To one end of the lever, moreover, is fixed an armature, H, which is concomitant to an electro-magnet, I, while at the opposite end of the lever is arranged a weight, J, acting thereon, with a tendency to bring the circhit-closing spring F in contact with the electrode G, which is the normal position of the lever.

When the machine is applied to use the positive pole of the battery or other source of electricity is connected to the post B and the nega 5 tive pole to the post B, the complete circuitot the current being as follows: From the post B the current passes to the posts G and O, and from G to the electrode Gr; thence to the spring F, to the lever 0, to the post E, to the magnet I, to the post L, and through the switch-arm M to the post N, to the post P, and the post B. As the armature H is atattracted by the electro-magnet I, the spring F is brought out of contact with the electrode G and the current is broken, causing the release of the armature and allowing the lever O to return to its normal position. The current being thus again established, the armature is attracted as before, the current is again broken, the armature is released, and so on. The lever 0 thus Obtains an oscillating motion, which continues as long as the charge or supply of electricityis kept up, and it follows that an intermittent or pulsating current is produced.

The functions of the posts 0 P are to receive the connections ot'thchandles of the apparatus.

Provision is made for adjusting the weight J on the lever O in a longitudinal directionas, for example, by a screw-thread, Jso that the motion of the lever and the ensuing pulsations can be regulated by that means-that is to say, when the weight is set outward the motion of the lever is quickened, while, when it is set inward, such motion is lessened, the Weight acting in a similarmanner to the pendulum of a clock. I

On the pivot-shafts of the lever O are arranged spiralsprings K, (one or more,) one 0 end of each spring being fastened to the post E, Fig. 2, while its other end is fastened to the pivot-shaft, and which is coiled in a direction away from the weight J, so that such spring co-operates with the weight to return 93 lever O to a normal position in a similar manner to the spring of a watch. An important function of the springs K is to prevent oxidation of the bearing ends of the pivot-shaft D- namely, by conducting the electrical current Ioc from the lever O at once to the post E without allowing it to flow to the pivot ends due to the connection of the springs to the inner or intermediate portion of the pivot-shaft and to the post, so that said pivot ends are left entirely out of the curient.

If desired, the springs K may be coiled or otherwise arranged to act in opposite directions, thus operating to produce the oscillating motion of the lever, and in that case the weight may be omitted. A wheel or segment, moreover, may be substituted for the lever if found expedient.

hat we claim as new, and desire to secure by Letters Patent, is

1. The combination, substantially as hereinbefore set forth, of an oscillating commutatorlever, O, carrying the circuit-closing spring F, the spiral spring or springs K, connected at one end to the pivot-shalt and at the other to the posts E, arrangedon the pivot-shaft of the lever for the purpose of preventing oxidation of the bearing ends of such shaft, the post- E and its connections, the armature H, fixed to one end of the lever, the return-weight J, arranged at the opposite end of the lever, the electrode G, and electro-magnet I, for the purpose specified.

2. The combination, substantially as hereinbefore set forth, of the commutator-lever or its substitute, the spiral springs K, arranged on the pivot-shaft ot' the lever to act thereon in opposite directions for producing or equalizing the oscillating motion of the lever, the circuitclosiug spring F, electrode Gr, armature H, and electro-magnet I, as specitied.

In testimony whereof we afiix our signatures in presence of two witnesses.

FRANCIS M. KIDDER, EMERSON W. KEYES, Administrators of J. Kidder, Ill. 1)., deceased.

Vitnesses:

O. H. CRAWFORD, E. 0. DEMING.

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