US 2135312 A
Description (OCR text may contain errors)
NOV. 1, P. MUCKLE I ELECTRIC VIBRATOR AND HEATER Filed April 4, 1938 FIG! PAUL ATMUCKLE 'INVENTORI ATTORNEYV Patented Nov. 1, 1938 UNITED STATES PATENT OFFIQE ELECTRIC VIBRATOR AND HEATER Paul Adrian Muckle, Denver, Colo.
Application April 4, 1938, Serial No. 199,852
3 Claims. (Cl. 128-242) This invention relates to improvements in elecflange 8 that fits against the wall 6 and the two tric therapeutic apparatus and has reference more parts when assembled form a round box of usual particularly to a combined vibrator and heater. construction. The metal of which it is made is In many instances various discomforts and ailpreferably soft steel or iron, and it must be made ments may be alleviated and sometimes remedied of magnetic material. Secured to the inner surby the application of gentle vibrations, especially face of the bottom 5 is a core 9 of soft iron. This if these are accompanied by a suitable amount of core may be spot welded to the bottom or seheat. Vibrators of difierent kinds have been incured thereto in any other suitable way. Sur- Vented and sold, but in many cases they leave rounding the core is a solenoid ID formed from is much to be desired, and as far as I am advised, a lar n m r f ns f enameled W i 10 no vibrator has been produced that also genersolenoid is wrapp Withsllitable insulating p ates heat. II and is so proportioned that it will fit snugly In practically every part of our country, the about the outside of the core. Wallli is provided commercial lighting and power systems emp1 with an opening which contains a metal bushing l5 alternating current, usually sixty cycles per se l2 through which the electric conductor 53 passes. 0nd, and this can be considered as th t d Conductor 13 contains a pair of wires l4 that are frequency and type of electrical distribution sys- Connected the ends o e S eno d n. The tems. conductors M are connected with a suitable Alternating current, as is well known, reverses Source Of alternating Current a d O e O t e its polarity periodically and during each cycle t conductors is provided with a switch l6. Secured 2O voltage passes through zero and t voltage curve to the inner surface of the cover is a ring I! is generally as near as possible to a sine curve. which is preferably made of copper or some good When an electroma t is energized by an electric conductor. This ring may be spot welded alternating current, th flux i reversed each or otherwise secured to the cover and is so posi' cycle. If an arm t r i mated near one pole tioned that it is concentric with the core 9. 25 of an alternating ur t magnet and has the Let us now assume that the apparatus described proper period of vibr ti it 111 be vibrated m and illustrated is connected with the alternating response to the flux i ti current source I5. A current will flow through It is also well understood that if a closed circuit, the 00h and this will Set up a magneto motive as for example, a metal ring, is so positioned that force which Produces a magnetic flux that flows t the flux from an lt ti current magnet through the core and through the material of the passes through it, elctrical currents will be set box ih the manner indicated by arrows in up in the ring hi h function as a closed At each reversal of the magnetizing current, the ondary of an ordinary transfor direction of the flux will reverse. It will be ob- Thi i ti briefl described, is a device for served that the major portion of the flux passes 3' producing heat and electric vibration by the use thmhgh the Opening in Ting and therefore sets of an alternating current magnet properly posi up in the ring an electromotive force proportional tioned with respect to a resilient magnetic cirto the rate of Chahge of the Due to the Quit and a Closed Secondary circuit electromctive force thus produced, a heavy cur- 40 In order to describe the invention so that it can rent will circulate in ring and this current be readily understood, reference will be had to will produce heat in a proportion that Varies as the accompanying drawing in which the invem the product of the resistance and the square of the tion has been illustrated in its preferred form current. Since magnetic lines of force will attract and in which: magnetic material, it is evident that the cover Figure 1 is a top plan view of the device which W111 subtected during each cycle to an forms the subject of this invention, parts being filtmcnveiorce S K tend j i wg gz e opposmg en 0 e core. e cover w1 gggg g g i 2 2535 gi g g fiisgf g j set in vibration by the action of the alternating flux and the frequency of this vibration will cort respond to the frequency of the alternating cur- 5O plghre 1S afldlagrammatlc Vlew Showmg the rent unless the natural period of vibration of the lhvehtloh m slmphhed formcover is greater than that of the flux, but the In th draw reference numeral 5 designates size of the box is so proportioned that it can vithe bottom of a round iron box having a circular brate t the required frequency. wall 6. A cover I is provided with a circular Due to the heat produced by the current flow- 55 ing through the coil l and by the secondary current flowing through the ring H, the whole assembly becomes hot, but since the heat is mostly due to the induced current in the ring I! it is limited and there is therefore no danger of the apparatus becoming so hot that it will cause burns or start fires.
In Figure 3 the several elements have been indicated in a diagrammatic manner and the box bottom and cover have been shown as connected by a single wall 6a. It is evident that if the magnetic circuit is resilient, the cover part 1a will vibrate at a rate corresponding to the current frequency.
From the above it will be apparent that the device described is extremely simple and compact and well adapted to produce both vibration and heat. The boxlike member can be enclosed in a suitable fabric bag and used for the alleviation of pain and Wherever vibration and heat are indicated.
Having described the invention what it claimed as new is:
1. An electric therapeutic apparatus for producing heat and vibration, comprising in combination, a magnetic circuit formed in part of a resilient member, an air gap in the circuit, one side of the air gap being formed by the resilient member, a solenoid surrounding the magnetic circuit, and a closed ring of non-magnetic conductive material surrounding the flux path, whereby when the coil is energized by a variable electric current the resilient portion of the mag netic circuit will be vibrated and whereby an alternating current will be induced in the ring for producing heat.
2. An electric therapeutic apparatus comprising a box formed from resilient magnetic material, the box having a removable cover, a core of magnetic material attached to the bottom of the box, a solenoid surrounding the core, the inner surface of the box cover being spaced a short distance from the free end of the core to form an air gap, and a ring of non-magnetic conductive material positioned in the box and enclosing the flux path, said ring forming a closed secondary of low resistance, whereby a large current will be caused to flow in the ring, and the sides of the box to vibrate when an alternating current is flowing through the solenoid, thereby producing heat and vibration.
3. A combined electric vibrator and heater, comprising a round box-like magnetic circuit having a removable cover formed from resilient magnetic material, a soft iron core attached to theinner surface of the bottom and terminating a short distance from the inner surface of the cover whereby an air gap is formed, a magnetizing coil surrounding the core, and a closed ring of non-magnetic conducting material attached to the inside of the cover and positioned to surround the flux path whereby an electric current will be induced in the ring when the coil is traversed by an alternating electric current.
PAUL ADRIAN M'UCKLE.