US1894598A - Electric terminal - Google Patents

Description

Jan. 17, 1 933. o sH 1,894,598

ELECTRIC TERMINAL Filed April 25, 1927 /1910 a-Iv I INVE/V Tax 7W; Wm'M Z I L (11') to be Patented Jan. 17 1933 YOSBIITOSHI NOISHIKI, OF KOJ'IIACHI KU, TOKYO, JAPAN ELECTRIC TERMINAL Application filed April 25,

The present invention relates to improvements in an electric terminal, consisting of a casing to be mounted on an apparatus for electric connection, a jack fixed to the interior of the casing, a plug to be plugged into said jack through a hole of said casing and the means for connecting one end i to an electric cord. Theprincipal object of this inyention is to simplify electric connection between electrically-connected means and to prevent the injurious distortion" of-a cord by making the terminal free to rotate in either direction without losing electric contact. It

is also to prevent the cord from being damaged and save the necessity of joining one cord to another by surrounding the cord with coil of flexible wire in the neighborhood where it is connected with the plug.

Referring to the accompanying drawing, Fig. 1, an elevation of this invention showing a section of the casing provided with a l Fig. 2, a cross section on line 2-2 of Fig. 1; Fig. 3, a front view of this invention showing the means for connecting a plug with a cord;

Fig. 4 a modification of this invention; Fig. 5, an elevation of this invention ap- 30 plied to a thermotologic electrode;

Fig. 6, a plan of the same.

Figs. 1-3 show clearly the construction of the jack and the plug which constitute the terminal of the present invention. 1) is a. tubular casing, and (2) is a bottom plate fixed thereto. To the center of this bottom is fixed a jack (3) of elastic metal plate bending in U-shape. The confronting leaves of the jack are corrugatediwith their tops and bottoms facing each other'venly so that they may form necks (4) (5) (6) and swells (4) (5). A screw (7) which fixes the jack (3) to the bottom plate extends to the outside of the casing through said bottom and serves as the means for attaching the casing to an electrical apparatus. The casing (2) has a round hole at the top through which to insert the plug (9) The plug (9) is provided at one end with necks (10) (11) and globular parts (10,) fitteelinto the necks (4) (5) and the swells (4) (5) of the jack respectively 1927, Serial in. 186,198, and a Japan October 6,

of the plug and at the-other endwith a collar (12 a screw (13) and aconnecting'pole (14). 15) is a bent tube made of ebonite or other suitable insulating material and has in its one end a thread 16) through which to receive a screw (13) of the plug (9) It has also a dilated recess (17) in the other end into which to insert coil (19) of the flexible wire which surrounds the end of the cord 18) The end of the cord (18) is connected with the plug (9) by a loop (20) and the above connecting pole (14) or the proper known means.

In the electric terminal of' this invention, the casing (1) and the jack (3) are fixed-by the screw (7) to an electrical apparatus, and afterconnected with the cord (18) by the above means, the plug('9) is inserted into the jack (3) through a hole (8) of the casing (1). In this case the globular (11) of the plug (9) open the necks (4) (5) in orderand are inserted into the jack until the collar (12) touches the top of the casing 1), when, as shown in Fig. 1, the globular parts (10) (11') and the necks (10) (ll) of the plug are fitted into the swells (4) (5) and the necks (4) (5) of the jack (3) and thusthe plug and the jack are brought into contact with each other by the spring action of the leaves of the latter. However, the connection of the plug (9) with the jack (3) being an elastic contact of the globular parts of the plug with the corrugated parts of the leaves of the jack, it is evident that the plug can be rotated freely without losing the contact with the jack. This is very important as an electrical connecting means for an electrical apparatus such as a thermatologic elec-v trode, etc. which always change the position of the use.

Further, as in this 7 invention the cord in one end ofthe bending tube, remaining half is outside the tube, we have only to pull the cord in order' to rotate the plug, and as the cord is protected by flexible wire where it is connected with the tube, there is no fear of its being .damaged by Figure 4 shows a modification oftlns nparts (10').

vention, in which although a plug and the means for connecting the same with co are similar to those shown in Figs. 1-3, a tubular casing which holds a jackis not employed, but a recess (21) is made in an aparatus for electric connection so that the similar jack to the above may be fixed therein, and a hole (22) is made for the plug through the above apparatus.

10 Figures 5 and 6 show an example of applying this invention to a thermatologic electrode. In it the modification as shown in Fig. 4 is used, and a recess is made in a casing (23) so that a jack as shown in Figs. 14:

15 may be fixed therein. Throu h the casing (23) a hole is made for a p ug, the other constructions being similar to those stated before. If an ordinary fixed terminal connection is used 111 a thermatologic electrode which 'has its one end connected with an electrical instrument for medical treatment and the other end with an electrode, it is not only inconvenient to handle when one wants to use it in a desired place, because 25 of a reaction produced by the twisting o the cord, but also it is easy to be damaged. However, in the electric terminal of this in-' vention the twisting of a cord can be avoid and accordingly the distortion can. be prevented. Moreover, as the end 0 a cor which is most liableto be damaged is protected, the cord is strong and durable.

I claim: In an electric terminal, a casing, a jack comprising corrugated leaves fixed therein, a plug rotatably mounted in said jack and having a plurality of spherical surfaces for engagement with said jack, a tubular casing mounted on said plug, and a conductor, an 40 end of said conductor being formed in a loop to engage with a portion of the plug within said tubular casing.

In testimony whereof I have aifixed my signature. YOSHITOSHI NOISHIKI.

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