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Publication numberUS2521 A
Publication typeGrant
Publication dateMar 28, 1842
Publication numberUS 2521 A, US 2521A, US-A-2521, US2521 A, US2521A
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
And in the construction of insulated conductors
US 2521 A
Abstract  available in
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Description  (OCR text may contain errors)


Nol 2,521- Patented Mar. 28, 1842.




Specication forming part of Letters Patent'No. 2,52 l, dated March 28, 1842.

To all 'whom t may concern/ Be it known thatI, PATRICK COAD, ot' the district of Southwark, in the countyof Philadelphi-a and State ot' Pennsylvania, have invented a new and useful Improvement in the Construction of the Galvanic Battery for Medical and other` Purposes, which is described as follows, reference being had to the annexed drawing of the same, making part ot' lthis specification.

'The nature of this invention and improve ment consists in combining a graduated cell or trough with the battery, so that by depressing or elevating the latter the intensity ot' the effect produced may be varied, having a scale on the frame which contains the trough,

or on any other convenient part of ythe apparatus,J and an index on the top of the battery pointing to said scale, by which the part of* the battery sufficient to be depressed in the dilute sulphurc acid orany liquid to be used may always be known, and consequently the intensity or quantity of the electric fluid suf-H' icient to suit the patient or any other pur pose that may be required. The top. of the weight in the present model forms the index, and making use of any ofthe known 4inechanical means, such as` weights, cords, and pulleys, or rack and pinions or screws 5. also, in the mode of insulating the wires by means of metallic cylinders provided with glass handles,

F F, turning on horizontal axles in said top o'f the frame. IA weight,E, is appended to the extremity of the said'cord, which acts as a couliter-balance to the battery.

A vertical scale, C, of inches and parts of inches is attachedto one of the uprights ot' the frame or to the outside of the trough, by 4which the position of the battery in the trough and theiguantity of the surface of the battery acted on by the dilute snlphnric acid are exac tly measured and the strength of the electric `fluid arising therefrom then ascertained and thereby brought under the control of the operator. When the battery is depressed so that quantity or intensity ot' the electric iluid 1s Just enough for the patient to'bear, then by noting the degree that the index coincides with lontneisealc that depression will be known tp answer at another time for-the same patient, so that any person can be taught to vuse the apparatus with accuracy and perfect safety to the patient, there being a pointer, lK, xed to the top of the battery for indicat ing the degree on the scale; or the topvot the battery will answer the same purpose, the strength of the electric iiuid Ybeing increased ,by immersing more surface of lthe battery and decreased by a contrary operation. A vertical scale, S, which is attached to the frame, by which the position of the battery may be ascertained from that of theweight, the bottom or top of which serving as the pointer; or a a brass pointer may be screwed to the top or bottom of the weight forpointing out the degree on the scale.

Shouldthe cord lengthen or shorten by a change of temperature or other cause, it may be adjusted by a screw in the weight, or a screw between two parts ot` the cord, or by the cord itself', so that the graduation of the battery. may'alway's be kept perfectly true. The scale may be divided into degrees and applied to any convenient part of the frame or trough.

The improved insulated electro-magnetic poles are made as follows: They consist of two metallic cylinders, each one being reduced in diameter at one end, forming a neck, which is perforated to admit the wire, which is secured 'by a screw inserted into theend of the neck till it intersects the aperture intowhich the Wire is inserted,and in which aperture it is held fast by said screw orother similar means, said cylinders being made convex at the large ends, and provided at the sides -with glass handles, which completely insulate the wires and give' the operator complete control over the electric fluid, enabling him to apply it to any part of hisbody, in conjunctionwith the graduated battery above described at any strength of shock required.

The glass handles are fixed to the metallic cylinders by means of metallic screws or spindles inserted into the cylinders and extending into the glass handles, but not through them. The dotted lines indicate the form and position of these screws or spindles.

It frequently may happen that the metallic cylinders cannot be conveniently or at all applied to the part affected to communicate the electric iiuid to the patient. -In such-cases any forms may be substituted, these forms terminating in balls, points, disks, or plates, or any other forms required. In these forms the glass handles may be soldered or screwed on at or near the other ends. These forms may be used to great advantage to operate on the ear, the eye, the tongue, the gums, or any part to which the metallic cylinders cannot heapplied. The ends L L of the metallic cylinders aremade conveX,'to convey the electric fluid more conveniently from their central part-s to any particular parts or points of the patient. If these ends be found too large or inconvenient, a pair of the other forms may be used.

The glassv handles may be of any shape to suit the hands, and the screws in them may be soldered, screwed, or in any otherway attachedhto the metallic cylinders to suit the operator.

Operation: The weight, Ste., being properly adjusted, fill theltrough with water, thenimmersethebattery therein, which will displace a quantity of water equal in magnitude to it; self. Then removethebattery and mark the lheight of the water in the trough, on the inside thereof. This will show-the quantity of dilute sulphuric acid or any other liquid th at may be used in the trough. In order to have the whole surface of the battery acted on when completely immersed, empty the water and put in its place dilute sulphuric acid 3 bring down the battery into the trough to the degree required, the strength of the electric fluid being ascertained, and the patient intending to operate on himself will hold a glass handle in cach hand and apply the metallic cylinder to the part of the body to receive the shock or stream of uid.

If a child is to be operated on, the battery must be raised until the pointer indicates on the scale the degree required for the strength of shock to be given. The metallic cylinders are then to be applied to the part to be galvanized by means of the glass handles held in the hands of the operator, which will give the shock required. It will thus be perceived that the operator will have sucha control over the electric fluid by means of this conjoint apparatus that he will be able to operate .on an infant of a day old with perfect safety, or on an ox of the largest size so as to deprive him instantly of life. It will also be perceived that these improved insulated electro-mag'- netic poles areY perfectly stable, the patient being able to hold them himself in his hands and to operate agreeably to his own feelings 0n any part of his body within his reach, producing any required pressure, nothing being seen but the b est conductor (metal) and the best non-conductor, glass, (which may be of any form,) as before stated. Under such complete control will the electric fluid be brought .that the brain of man itself can be operated c on with perfect safety, which has aiready repeatedly been' done by the inventor.

The apparatus will be found peculiarly serviceable in many diseases which are very prevalent in this country, such as rheumatism and nervous affections, to the cure of which it has recently been applied bythe inventor with great success.

The insulators heretofore used for electromagnetic purposes having hollow glass cylinders run on the wires or poles and cemented, with metallic balls attached to their extremities, were liable to .severalobjectionsnamely,

from the cement interfering with the passage of the electric fluid, the wires bending, the apparatus being unstable, and the operator not being able to give the pressure requiredon the part to be galvanized.

I do notclaim to bev the inventor ot' the metallic cylinders or the screws by which the wires are attached to said cylinders 5, neither do I claim to be the inventor of t-helglass handles with metallic screws partly through; but

I do claim as my inventionl. The attaching of the glass handles to the metallic cylinders, in the manner and for the purposes speciiied.

2. The modes of depression and elevation of the galvanic battery, and the graduation of said battery and galvanic trough, so thatthe intensity of the effect produced may be varied.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4681112 *Oct 1, 1986Jul 21, 1987Physio-Control CorporationMedical instrument including electrodes adapted for right and left-handed use