US2202195A - Adjustable joint - Google Patents

Description

May 28, 1940. M. J. 'DRACHMANY ET AL 2,202,195,

1 ADJUSTABLE JOINT v Filed Oct. 10, 1936 ZSheets-Sheet 2 ISnnentor arm.

Patented May 28, 1940 PATENT OFFICE ADJUSTABLE JOINT Myron Drachman and Kurt Stoye, New York, N. Y., assignors to Peerless Laboratories Inc.,

New York, N. Y.

Application October 10, 1936, Serial No. 105,060

1 Claims. (61.282-14) This invention relates to improvements in electrodes for use in short wave therapeutic treatments. The term short wave is used to designate electrical currents of frequencies from ten million cycles per second and higher as applied to medical treatment or uses. The invention applies particularly to waves of a frequency of thirty million cycles per second or higher cor-- responding to awave length of ten meters or less.

-More specifically the invention consists of a convenient and practicable means for supporting condenser type short wave electrodes so that 7 these may be readily adjusted to any part under treatment and retained in their proper positions during treatment, in relative security. Another function of the invention is to provide a relatively fixed but adjustable-distance of the elect'rode from the surface of the part being treated, substantially without the interposition of any solid substance, so as to avoid any distortion of the electric field by changing the dielectric values between the patient and condenser electrodes;

for this purpose the electrode is provided with a guard, the latter being designed to permit positioning of the condenser electrode in the very plane of the edge of the guard.-

The invention is illustrated in the accompanylng drawings, showing a preferred embodiment of the invention, in which: Figure 1 is an assembled view of a supporting arm and the electrode carried thereby, parts of the arm and the electrode being in longitudinal section.

. Figure 2 is a view of a joint between relatively 35 movable parts of the supporting arm, the joint being shown in longitudinalsection.

I Figure 3 shows-another type of joint with parts thereof insection. This joint is intended primarily for anchoring the electrode arm \to a base- 40 of any suitable form, or a wall. v

Figure 4 shows another type of jointto be used between relatively movable parts of the'electrode Figure 5 shows a pair of electrode supporting i5 arms mounted upon a pedestal.- I

In Figure 1 are shown supporting members I and 2- provided with frictionally controlled swivels I, I, and 5, the extreme swivel having a supporting member or flange which may be se-' 0 cured to a relatively rigid body such as a wall, tripod, base or cabinet. At the other extremity a form of bail and socket universal. Joint 6- is mounted and permits freedom of motion inany direction to the electrode I which is located at 55 the extremity of-a hollow dielectric-shaft 8 passing through the ball. This nal portion of 22.

more apertures in its circumference and between shaft contains a conductor through which current passes from the treatment cable originating at the terminal of the short wave generator tothe insulated me-. tallic condenser plate 9. The adjustable treat- 5 ment spacer or guard consists of a ring I0 mounted on extension members II and sliding member. l2 which may be secured by a locking device l3. If the ring be placed against the surface to be treated and the locking device clamped against the shaft, the electrode will not. approach the surface closer than the predetermined rela-.j tive positiona For the frictionally controlled swivels and-- joints in the am, we elect to employ a type unique in the art, three forms of which are illustrated sectionally in Figures '2, 3, and 4. In Figure 2, the swivel elements 22 and 23 contain sockets for securingthe shaft of the arm, and circular portions which are clamped together by bolts '14 and i5. Attached to a circular portion of 23 but capable of some relative axial motion is friction plate or means 16 and elastic washer or means which may be of rubber. When the bolts l4 and lSare tightened, the' swivel element 25 is clamped between friction plate l8 and swivel results in a smooth and readily adjustable friction between the two elements of the swivel. A retainer" l9 is'provided for the elastic washer ll. InFigure 3,22 is, a smooth ring suitably se-.

cured at oneend and carrying avertical slot on the'other. I screw [4 passes thru this slot and with its nut. secures sliding portion 23 which contains a socket for supporting an arm. 22 is I thus permitted a circular motion in the vertical plane of the ring. Screw I 4 withits nut. further 40 .compresseselastic member I 1 between retainer I! and afriction facing thereby causing an easily regulated frictional force between 23 with attached parts and ring 22. v

In Figure 4", swivel portions or arms 22 and 23 bear on one another thru cylindrical bushing or shell 2| which fits smoothly within a hollow jour- Thebushing 2| has one or its ends, in each of which, is fitted a friction member forming friction means. Two such friction members it and II are ,shownin the sec-1.7g

tional view of Figure 4, but'obviously any sultable number may be provided. Elastic bushing cular portion of 23 thereby causing friction members I 6 and I8 to be pressed outwardly against the inside cylindrical surface of the hollow portion of arm 22. The amount of friction is easily adjusted by means of screw ll. Bushing or tube prevents H from pressing against the screw M which would tend to cause binding.

In all of designs above the elastic member must be provided with a suitable retainer to prevent expansion 'or frictional pressure except where needed to cause friction.

In Figure 5, a pair. of electrodes, with their supporting arms are swivably mounted on a commonsupport 2|.

The invention described herein is intended for use with the short wave therapeutic apparatus shown and claimed in a copending application Serial Number 105,059, filed October 10, 1936.

What we claim as novel and desire to secure by Letters Patent is:

1. An adjustable swivel joint comprising two members one of which is movable relatively to the other, a friction surface upon one member, rubber-like elastic means, and means to completely enclose and confine the rubber-like elastic means including a friction means engaging the friction surface and the rubber-like elastic means, and means to compress the rubber-like elastic means in one direction whereby the friction means is pressed against the friction surface laterally with respect to the direction of compressionof the rubber-like elastic means.

2. An adjustable swivel joint comprising two members one of which is movable relatively to the other, one of said members having a bore therein to provide a cylindrical friction surface, a cylindrical shell within the bore and having at least one aperture therein, a friction means within each aperture and engaging the friction surface, a rubber-like elastic means within the shell and engaging the friction means, and means including the other relatively movable member to compress the rubber-like elastic means axially whereby the friction means is pressed radially against the friction surface.

3. An adjustable swivel joint comprising two members one of which is movable relatively to the other, one of said members having a bore therein to provide a. cylindrical friction surface,

a cylindrical shell within the bore and having at least one aperture therein, a friction means within each aperture and engaging the friction surface, a tubular rubber-like elastic means within the shell and engaging the friction ineans, a boss upon the other relatively movable member received within one end of the shell and engaging the rubber-like elastic means, a washer having a boss received within the other end of the shell and engaging the rubber-like elastic means, a tube received within the tubular rubber-like elastic means, and a bolt passing through the tube and engaging the second member and the -member, friction means engaging each friction surface and having a boss received within the bore, rubber-like elastic means engaging one of the friction means, and means to compress the rubber-like elastic means whereby the friction means are pressed against the friction surfaces.

5. An adjustable swivel joint comprising a first member having a cylindrical bore therein and a flat friction surface upon opposite faces of the member, a second member having a boss swivably received in the bore of the first member and engaging a friction surface, friction means engaging the other friction surface, rubber-like elastic means engaging the friction means, and means including a washer to enclose and compressthe rubber-like elastic means whereby the friction means and the second member are pressed against their respective friction surfaces.

6. An adjustable swivel joint comprising two overlapping members one of which is movable relatively to the other, a hole through one of said members, bolt means adjustably carried by one of said members and passing through said hole for adjustably connecting said members together, and elastic rubberlike means carried by and its compression selectively adjusted by said bolt means to operatively vary the friction between said relatively movable members. v

'I. An adjustable swivel joint comprising two overlapping members one of which is pivotally movable relatively to the other, a cylindrical hole through one of said members, means carried by the other member engaging the hole so that the axis of the hole is the axis of the pivotal movement between the members, bolt means adjustably carried by the next aforesaid 'means and passing through said cylindrical hole for connecting said members together, and elastic rubberlike means carried by said bolt means and operative to vary the friction between said relatively movable members.

' KURT STOYE.

MYRON J. DRACHMAN.

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