US701185A - Electrotherapeutic apparatus. - Google Patents

Description

Patented May 27, I902.

G. W. EUKER. ELECTROTHERAPEUTIC APPARATUS.

(Application filed Feb. 26, 1902.)

(No Model.)

attomwng iiL'Wllllllll "IWIIIIIH UNITED STATES: PATENT OFFICE.

GEORGE WILLIAM EUKER, OF RICHMOND, VIRGINIA, ASSIGNOR TO EDWIN O. MEYER, F RICHMOND, VIRGINIA.

ELECTROTHERAPEUTiO APPARATUS.

' SPECIFICATION forming part of Letters Patent No. 701,185, dated May 27, 1902.

Application filed February 26, 1902. Serial. No. 95,728. (No model.)

To all whom, it may concern: ing-posts l and 2. The binding-post l is con- Be it known thatI, GEORGE WILLIAM EU- nected by wire 3 to a terminal 4 of the alter- KER, a citizen of the United States, residing hating-current circuit-breaker c, and thence atRichmond, in the county of I-Ienrico and through the carbon-breaks c o and coil 0 of 55 5 Stateiof Virginia, have invented certain new cut-out, thence to terminal 5, no-arc fuse 6, and useful Improvements in Electrotherathence by wire 7 to one of the lower points of peutic Apparatus; and I do declare the folthe main switch d. The main binding-post 2 lowing to be a full, clear, and exact descripis connected by wire 8 to one of the terminals tion of the invention, such as will enable oth of the no-arc fuse 30, and thence by wire 10 6o 10 ers skilled in the art to which it appertains to the other lower point of the main switch (1.

to make and use the same, reference being One of the upper points of this switch d conhad to the accompanying drawings, and to the nects by wire 11 to one of the terminals of a letters and figures of reference marked therechoking-coil rheostat or cycle-regulator e, the on, which form a partof this specification. other terminal of which connects by wire 12 65 I 5 This invention relates to improvements in to one of the field-terminals of the motor a.

electrotherapeutic apparatus, and more espe- The other field-terminal of this motor is concially to the converting and controlling of alnected by wire 13 to one of the lower middle ternating currents of high pressures, such as points of j a three-blade switch f and thence usually furnished for commercial use, and through the switch to wire l-l, which con- 70 2o rendering the same available for thearapeunects to the motor-brush a. The other mo tie and other medical or surgical purposes. tor-brush a connects by wire 15 to one of the The principal object of this invention is to upper central points of the switch f and then supplant the crude, annoying, and expensive through the central blade of said switch by battery hitherto considered the only practiwire 16 to the main switch cl. The object of 7 5 2 5 cal source of therapeutic current by current this cycle-regulator is to render the motor at derived from ordinary electric-light serviceadaptable to any of the commercial alternatmains and to so govern the current as to ining-current systems. Many such systems resure absolute safety to the patient, and, furquire motors to be wound and constructed ther, to render the apparatus for utilizing with especial reference to the periodicity of 8'0 this current operative on an alternating-curcurrent that they employ. Ilencea motor conrent circuit of any of the commercial frestructed to operate upon a one-hundred-andquencies. forty-cycle system would not ordinarily work To these ends the said invention comprises upon a twenty-fiveor fifty cycle system. My the combination and arrangement of parts invention by the use of the cycle-regulator 85 3 5 hereinafter more fully described, and particherein shown overcomes this difficulty.

7 ularly pointed out inthe claims. The operation consists simplyin adj ust-ing Referring to the accompanying drawings, the handle e of the cycle-regulator 6 until Figure l is a front elevation of a switchboard the desired amount of impedance 6 is in the with the apparatus and connections embodymotor-circuit to produce the required freo 40 ing this invention mounted thereon and conquency.

nected thereto, and Fig. 2 is a bottom plan The motor a is started by closing the view of the foot-rheostat. switch d.

The apparatus constituting my invention The direct-current dynamo b is preferably is mounted upon a switchboard A of anysuitshunt-wound and provided with a field-rheo- 5 able insulating materialsuch as slate, marstat g, the terminals of which are -connectedin ble, or porcelainand comprises, among other the field-circuit of said dynamo by wires 17. parts, an alternating-current motor a, direct The armature-brush b of this generator concoupled through a shaft b with a direct-cue nects by wire 18 to one of the binding-posts of I rent shunt-wound dynamo Z), the two together a milliampere-meter, while the other-binding 100 i constituting a rotary converter. The alterpost of this meter is connected by wire 19 to l natingcurrent mains are connected to bindono of the terminals 7' of a shunt-rheostat 9'.

The circuit then passes out of the terminal of said rheostat and enters the left-hand blade of the reversing-switch .2, passes through said switch into the wire 20,'and passes into the plus binding-post. The dynamo-brush b is connected by wire 23 to the carbon-contact of the direct-current circuit-breaker 7c. The circuit then passes through the other carbon-contact N, then by wires 24 25 to a binding-post of the coil of the voltmeter I, thence out of the other binding-post of said voltmeter by wire 26, which connects to one of the binding-posts of the shunt-rheostatj. The circuit then passes by wire 26 to the blade of the reversing-switche', crossing over to the lower left-hand point of said switch, and by wire 27, terminatingin binding-post 22. It will therefore be seen that the dynamo I), together with the shuntj and voltmeter Z, is connected in shunt across the binding-posts 21 22, while the milliammeter 7L will bein series with the object connected to said binding-posts. The shuntj, however, is provided with a stop 7' at the lowest point of resistance, (two hundred and twenty-five ohms,) so thatnever more than half of an ampere at one hundred and twenty-five volts ever passes said resistance. The reversingswitch 2 is connected, as shown, in such manner that when in the up position current will flow in one direction through the object connected to binding-posts 21 and 22 and in the opposite direction when the said switch is down. Therefore to furnish direct current to any object connect to the binding-posts 21 and 22.

The voltmeter Z is of peculiar construction, being adapted to cooperate with the circuitbreaker 7tand automatically break the directcurrent-dynamo circuit when the voltage exceeds a predetermined amount. To this end I provide the voltmeter with an adjustable contact-point m, carried by an arm pivoted, as at m, and provided with a knob m by which the said contact-point may be adjusted to any desired position on the voltmeter-scale and is so mounted as to lie in the path of the index or pointer Z The contact m is connected through its pivot and a binding-post to a wire 28, which connects to one of the terminals of the coil of the circuit-b1'eaker7.;, while the voltmeter-pointer is connected, as by wire 29, to the lower point of the no-arc fuse 30. When the voltage rises to such an extent as to send the pointer Z into engagement with the contact m, current from the alternating-current-motor circuit will flow through the coils of the circuit-breaker 7;, causing it to break the circuit of the directcurrent dynamo. The circuit of the alternating current will be from the lower point of fuse 29 to voltmeter-pointer, contact m,

all times strong enough to actuate the circuitbreaker, whereas the direct current may at times be too feeble, though any increase therein might be fatal or injurious to the patient.

An alternating-current voltmeter to indi cate the voltage of the service-mains maybe connected to them at any suitable point.

I employ also a static alternating-current transformer n, comprising a primary coil 01 and three secondaries n a and 91 the secondary n being the cautery coil and is provided with very coarse or heavy winding. The secondary it produces the sinusoidal current and is much finer, as is also the coil a. The circuit of the primary of said transformer is from the left-hand upper point of the main switch, through the said coil to a single-b1ade switch 0, thence back to the upper right-hand point of said main switch. The secondary coils of this transformer are shown removed from the primary, but in practice are Wound on cores and slipped over said primary. It a cautery current is desired, connect to binding-posts If it is desired to use small lamps of half a volt or upward, connect to binding-post 34, and to obtain a sinusoidal current connect to binding-posts 35. These binding-posts are connected to their respective secondaries by the wires 36, 37, and 38, as clearly shown. A pulsatory current may be obtained by connecting to the bindingposts 40 41. These binding-posts connect by wires 42 43 with the primary of the inductioncoil 23 of a pulsator having one terminal of its secondary connected, as by wire 44, with one of the brushes of the direct-current dynamo, while the other terminal connects by wire 45 through a single-blade switch q with a pendulum contact-maker having an adjustable weight p by which the period of its oscillation may be varied. The oscillating contact-maker engages a fixed contact 29 which connects by wire 46 to the other brush 1) of the direct current dynamo. To obtain a faradic current, connect to binding posts 4748. These binding-posts are connected by wires 49 50 with the secondary of a faradic induction-coil 0, one terminal of the primary of which is connected to the brush b of the dynamo and the other through the wire 51, single-blade switch .9, vibrator r, and contact r with the other brush b of the said dynamo. For charging storage batteries connect to binding-posts 52 These bindingposts are connected to the double-throw reversing-switch t by wires 54, the said switch being connected to wires 44 and 46, leading to and from the brushes of the dynamo. By throwing this switch 25' up the current from the binding-posts 52 53 passes in one direction, while if the switch is thrown down the current from said binding-posts is reversed. As it is often useful in charging storage batteries to reverse the current, this arrangement affords means for doing this without the necessity of disconnecting the batteries.

For the purpose of operating drills, saws and the like I provide a flexible shaft u, having a handpiece 1; at one end and at the other connected to a rotatable disk '0 which by means of an adj usting-nut 11 may be brought into contact with and receded from a small power-pulley r mounted on the shaft connecting the motor and dynamo. The pulley o is provided with a peripheral rubber band '0 I also provide for use with the flexible shaft attachment a three-speed reversible alternating-current foot-rheostat w,from which leads a cable 10, containing four wires, which connect,respectively,to the four bindin g- posts 55, 56, 57, and 58, the said binding-posts being connected, as shown, to the three-blade reversing-switchf, and thence to the motor a, as shown. This rheostat is operated by foot by means of the lever 10 which may be held by the locking device w in any of the three operating positions on either side of the central point.

Located above the meters are two pilotlamps 00 so, which are connected in the alternating-current main circuit through the single-blade switch y.

Finally, the whole apparatus on the board A may be inclosed in a glass or other suitable casing to protect it against injury from the outside.

Having described a form of my invention, it is obvious that I may make changes and alterations therein without departing from the spirit of the same; but

What I claim, and desire to secure by Letters Patent of the United States, is

1. In electrotherapeutic apparatus,the combination with a pair of alternating-current service-mains, of a rotary converter connected to said mains, and a combined voltmeter and automatic cut-out for limiting the voltage of the direct current from said converter.

2. The improved means for limiting the vol= tage of a source of electricity for therapeutic purposes, comprising a voltmeter measuring the voltage of the direct therapeutic current, an adjustable contact operated by said voltmeter, and a circuit-breaker operated through said contact.

3. In electrotherapeutic apparatus, the combination with a main alternating-current circuit, of a rotary converter operated by the current in said circuit, and means for automatically limiting the voltage of the direct current produced by said converter, said means comprising a voltmeter connected in said direct=current circuit, an adjustable contact operated by said voltmeter, and a circuitbreaker located in said alternating-current circuit and operated by the contact of said voltmeter.

4. The combination with a pair of alternating-current service-mains, of a rotary converter connected thereto, a cycle-regulator connected in the alternating-current circuit of said converter, and electrotherapeutic apparatus connected inthe direct and alternating current circuit of said converter.

5. The combination with a pair of alternating-current service-mains, of a rotary converter connected thereto, a cycle-regulator comprising an adjustable choking-coil connected in the alternating-current circuit of said converter, and electrotherapeutic apparatus connected in the direct and alternating current circuit of said converter.

6. In electrotherapeutic apparatus, the combination with a pair of alternating-min rent service-mains, of a rotary converter con nected to said mains, and a pulsator operated by the direct current from said converter and adapted to produce pulsations of varying periods.

7. In electrotherapeutic apparatus, the combination with a pair of alternating-current service-mains, of a rotary converter connected to said mains, and a pulsator operated by the direct current from said converter and adapted to produce pulsations of varying periods, said pulsator comprising aninductiom coil provided with a circuit-interrupter consisting of an oscillating contact-maker having an adjustable weight attached thereto.

8. In electrotherapeutic apparatus, the combination with a pair of alternating-current service-mains, of a rotary converter connected thereto, a flexible shaft and a coupling for connecting said shaft to said rotary converter.

9. In electrotherapeutic apparatus, the combination with a pair of alternating-current service-mains, of a rotary converter connected to said mains, and a rheostat connected in multiple with the direct-current terminals of said converter, substantially as and for the purposes herein specified.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE WILLIAM EUKER.

Witnesses:

S. S. P. PATTESON, O. C. CoUsINs.

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