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Publication numberUS450923 A
Publication typeGrant
Publication dateApr 21, 1891
Filing dateAug 16, 1890
Publication numberUS 450923 A, US 450923A, US-A-450923, US450923 A, US450923A
InventorsLeonidas G. Wool-ley
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electro-magnetic apparatus
US 450923 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

(No Model.) 2 Sheets-Sheet 1.


(No Model.) 2 Sheets-Sheet 2.



No. 450,923. PatentedApr. 21, 1891.




SPECIFICATION forming part of Letters Patent No. 450,923, dated April 21, 1891.

Application filed August 16, 1890. Serial No. 362,238. (No model.)

To a/ZZ whom it may concern.-

Beit known that I, LEoNiDAs G. WooLLEY, a citizen of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new Y and usefullmprovements in Electro-Magnetic Apparatus; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Myinvention relates to an electro-magnetic apparatus; and my object is to produce an apparatus having a battery, an electro-inagnet, and a primary and secondary coil constructed and arranged in such a manner that the primary current may be available for operating Various electrical appliances, annunciators, alarms, thermostats, ttc., and the induced current for medical purposes.

The object of my invention is to combine in a compact form both a signaling and a therapeutic apparatus, either one of which may be brought into operationindependently of the other, but in which the ringing of the bell is prevented while the therapeutic apparatus is in use.

Figure 1 is a perspective view of a device embodying my invention, with the top and front removed to show construction and arrangement of parts; Fig 2, a front elevation of the same, and Fig. 3 a plat of the electrical circuits.

A represents a box of wood or other suitable material, which is adapted to be placed wherever convenient and is divided by a vertical partition A into two chambers A and A. Within the chamber A is arranged the battery, and within the chamber A are various parts of the apparatus, and upon the outside of the box is secured an alarm-bell B, and the box and partition are perforated at various points to admit the Wires and other parts, as' will be noted. Vithin the chamber A and secured to the upper portion of the partition A, is the electro-magnet, which is of peculiar construction and consists of a central core D, having enlarged/integral pole-pieces D D, having fiattened faces D D arranged upon opposite sides of the magnet in the plane of its axis, and an enlarged neutral central portion D', to which. the armature is pivoted.

The armature E has a central opening Within which the magnet is placed, and has its end portions opposite to the flattened faces D D connected by integral oppositely-curved side portions perforated for the pins, by which they are pivoted to the neutral portion D', and is provid ed with the usual retracting-spring. (Shown in Fig. 1, not lettered.)

The inner primary coil F of coarse wire surrounds the core D and connects with the poles of the battery. though insulated from, the induction or secondary coil F', having loops F F F of various lengths in the induction-circuit for varying the intensity of the current which have their ends attached to posts T T T.

C O are posts attached to the box for the wires of the primary current, which is provided with an outside circuit X X, and an inside, derived, or shunt circuit y y, both of which are normally open. It is obvious that the outside circuit X may be extended, duplicated, and utilized for operating a variety of electrical appliances, as stated. In the plat it is shown open, but adapted to be closed by a push-button X forvoperatingthebellB. The inner circuit y is closed Whenever the apparatus is in use therapeutically, as will be hereinafter explained. The primary current is also broken through the armature to and through the electro-magnet by a circuit-breaker, consisting of a post G, secured to the insulator S, attached to the end of the magnet and a spring H, secured to the opposite end of the armature and moving with it, the end of the spring H engaging the end of the post G periodically in the usual manner. The induced or secondary cur-rent being set up by the primary current, whatever interrupts the latter produces a corresponding interruption of the induced current. Hence the opening and closing of the therapeutic or secondary current is accomplished by the same circuit breaking' mechanism; but for increasing the rapidity of the action of this mechanism, when the induced or secondary current is to be used, additional appliances are provided, as will also be hereinafter explained.

P represents a curved lever, which is horizontally pivoted by a screw C to partition A in such a manner as to have a limited vertical movement, the upward movement This is surrounded by,


being arrested by a stop-pin P and the downward by an adjustable eccentric M, both attached to partition A, and has a laterallyprojecting arm P at its upper end for engaging the rod E', and is provided with hooks Q Q upon its outer end, which is outside the box, and upon which are hung the hand electrodes R R. The long arm being inside the chamber, the weight of the electrodes keeps it normally in a horizontal position. A spring or contact-point N is also attached to the partition A, and has its upper end adapted to engage the lever P for closing the circuit, and the screw C and the spring or contact-point N are within the circuit y, as shown upon the plat. The electrodes R R are connected by conductors U U to the posts T, the conductors U being provided with usual detachable pins, whereby the loops F of varying power may be used. Thus if the posts T T are used, the full strength of the secondary current will be received; but if one of the posts T and one of the posts T are used, the secondary current received will be of lesser power. It will now be seen that whenever the primary current is passing through the circuit F an induced or secondary current is set up in the circuit F', that both the outercircuit X X and the inner circuit fy y are normally open, that the circuit X X may be employed, as stated, for various purposes, and that whenever the apparatus is employed therapeutically the electrodes are removed from the hooks Q Q, whereupon the lever P falls by gravity into contact with the spring or contact-point N and closes the shunt-circuit of the primary circuit, thereby setting up the induced or secondary current which flows through the circuit F', and by means of the conductors U U and electrodes R R the current may be directed to any part of the person. It will also be noted that when the lever P falls, its movement being arrested by the stop M, the arm P is brought nearer to the arm E', which is secured to the end of the armature, and' arrested just above the same sufficiently near to prevent a hammer on the end of E from striking the bell and to limit the vertical movement of the armature, thereby greatly increasing the rapidity of its vibration, whereby a nearly continuous current is produced as in ordinary electro-medical apparatus.

For indicating that the primary circuit has been closed in any part of the system, I arrange upon the outside of the case a pointer V, secured upon the outer end of a shaft K, which is journaled in a boss .I upon an arm I, integral with the magnet. Upon the inner end of the shaft K is secured a bell-crank lever L, having a vertical arm L engaging a projection O upon the bottom of the end of the armature and a weighted horizontal arm L. When the end of the armature is attracted toward the magnet by the closing of the circuit, it is lifted away from the arm L and the weighted arm L falls, causing a partial revolution of the shaft K, carrying the pointer V, therebyindicatingthe closing of the circuit. At the same time the hammer upon the end of E strikes upon the bell B. A sector W maybe placed at the end ofthe pointer, if desired.

I-Ieretofore signaling and therapeutic apparatuses have been made entirely separate and distinct; and my invention consists in the peculiar mechanism whereby the two are combined in a single apparatus and not in the devices which constitute either apparatus alone. It is evident that al1 of the signaling devices may be omitted without in any manner interfering with the therapeutic apparatus; but as it is greatly desirable to have all of the electric apparatus in the house put up in the smallest possible space the two apparatuses are combined as here shown.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

I. The combination, with an induction-coil, of two circuits for the primary coil, a manual circuit-closer in one circuit and a switchlever controlled by gravity in the other circuit, both including a vibrating rheotome, whereby the device is adapted for use either as an ordinary electro-magnet or for the production of secondary currents, substantially as shown.

2. The combination of a box having a partition dividing the same into two chambers, a battery in one chamber and an electromagnet having an armature arranged in the other chamber, a normally-open primary circuit and current breaker, a secondary circuit, loops in the secondary circuit of variable dcgrees of resistance, a pivoted lever adapted to automatically close the primary circuit on the removal of the electrodes, electrodes suspended from the pivoted lever, and suitable conductors.

3. In an apparatus of the class described, in combination with a suitable casing and battery, an electro-magnet having a primary coil thereon, a secondary coil surrounding said primary coil, an armature and circuitbreaker attached to the magnet, a lever adapted to close the primary circuit and limit the movement of the armature for increasing the rapidity of such movement and having the electrodes of the secondary circuit suspended from the free end thereof, whereby on removing the electrodes the primary circuit will be automatically closed and the induced current set up ready for im mediate use, substantially as set forth.

In testimony whereof I afiix my signature in presence of witnesses.






Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4176349 *Dec 5, 1977Nov 27, 1979Fliegel Martin SIntravenous alarm system
US4561426 *Sep 27, 1984Dec 31, 1985Stewart David JMagnetic biological device
US4567477 *Sep 4, 1984Jan 28, 1986Cormier Laurent LSmoke detector switch indicator
Cooperative ClassificationA61N1/32