US2075632A - Plug electric switch - Google Patents

Description

March 30, 1937.

M. ZUCKERMAN 2,075,632

`PLUG ELECTRIC SWITCH Filed Nov. 26, 1935 2 Qt in! /U ATTORNEY;

Patented Mar. 30, 1937 .PATENT ori-ICE PLUG ELECTRIC SWITCH Milton Zuckerman, New York, N. Y., -assignor to Irving' Haas, New York, N. Y.

Application November 26, 1935, Serial No. 51,666

2 Claims.

'Ihis invention relates to electric switches and particularly to an improved plug electric switch, and has for an object to provide a structure which may be quickly applied and removed and when applied may be locked in position.

Another object of the invention is to provide a plug for electric sad irons and for other devices using cylindrical terminals,the structure being such that the plug may be applied from either' oftwo 'directions and then locked in place. A furtherobject, more specifically, is to provide a plug switch structure for round terminals wherein the contacts engaging the terminals are moved toward and from the terminal so that at one time they will grip `the terminals and at another time they will release the terminals.

In the accompanying drawing:

Fig. 1 is a plan view of a plug switch disclosing an embodiment of the invention;

Fig; 2 is a longitudinal sectional view. through Fig.3 approximately on the line 22;

Fig. 3 is a sectional View through Fig. l approximately on the line 3-v3;

Fig. 4' is a. transverse sectional view on an enlarged scale through Fig. 1 approximately on the line 4 4; and- Fig. 5 is-a'n enlarged view similar to the left hand end of Fig. 2 but showing the plug applied from `the end. e

Referring to the accompanying drawing by numeral, I indicates the plug as a whole andl though this is not essential to a lgood contact.-l

Thesegroov'es areprovided so that they plug I may be locked to the terminals 2 andA 3. The

40` plug I is provided with a casing having a body 6v and a cover 1 which,may be held in place' in any desired manner, as'- for instance by the bolt 8. This casing is made from insulating material and encloses the respective gripping 'terminals 9 and I0. .As these terminals are identical the same description will apply to both.

As shown in Fig. 2, terminal 9 is formed from a piece of wire or other metal having a loop II for accommodating the bolt I2 which connects the wire-I3 to the terminal or contact 9. From the loop II the wire is formed into bars I4 and I5 which diverge to points vI6L and I1. From points I6 and I1 -to the points I8 and I9 the bars converge and then merge into a rounded socketstructure 20. The Wire is bent upwardly at right angles at the outer end of the socket structure and is then bent into a second socket structure 2|. The socket structure 20 is adapted to grip the posts or terminals 2 and 3 when the plug is applied as shown in Fig. 4, while the socket 2| grips the terminals when the plug is applied vfrom the end asshown' in Fig. 5.

When the parts are in the position shown in Fig. 2, the plugmay be slipped over the terminals 2 and 3 readily and then the thumb or hand member 22 is moved to theri'ght from the position shown in Fig. 3. This thumb or hand member is connected bya'bolt 23 to a cam bar 24. Guide pins 25 and 26 are carried by the cam bar and extend into the respective slots 21 and 28. For each of the terminals or contacts the cam bar 24 is pr vided with cam surfaces 29 and 30, whereby ast e bar 24 is moved to the right as shown in Fig. 3 the camsurfacesjust men-l tioned will act on the inclined partscf the terminal and cause the socket 20 to squeeze the terminal posts 2 and 3. This squeezing action takes place in the respective grooves 4. In this way a good electrical contact is vsecured and also the plug I is locked tothe terminal posts 2 and. 3. When the plug I is applied from the end as shown in Fig. 5, the same action takes place, except that the sockets 2| engagethe posts 2 and 3 in the respective grooves 5. By.y reason of the construction just described the plug may be easily applied. and easily removed, but when applied presents a locked construction and agood contact between the respective terminals.v

I claim:

1. A plug electric switch including a plug formed `with a casing having a pair of openings in one side and a pair of openings in one end, said openings being adapted to receive plug terminals at diierent times, ai pair of terminals arranged in saidl casing, eachof said terminals being formed with a pair of resilient'bars merg ing into an inner structure presenting apair of socket formations, said inner structure including a pair of barsinclined toward each other and at their point of nearest approach merging into a pair of facing arc-shaped socket ends, one socket formation normally positioned on e "h ,side of the aperture in the side of the casing.`

2. A plug for an electric switch comprising a hollow rectangular casing having a pair of openings in one side near one end for-the reception of a pair of plug terminals, anda pair of openings in one end spaced the same distance apart as the :first mentioned openings, a pair of terminals arranged -in said casing, the terminals be- A ing arranged with one end adjacent the respec-l tive openings in the casing, each of said termi- 10 nals comprising a pair of bars extending longitudinally of the casing having a tapering structure merging into arc-shaped ends having varc-

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