US2071099A - Rotary electric switch - Google Patents

Description

Feb. 16, 1937. M. zUcKERMAN ROTARY ELECTRIC SWITCH Filed NOV. 26, 1935 www .V ATTORNEYS JiZDn Zuckerman BY WMA/7 WITNESS ES Patented Feb. 16, 1937` 2,071,099

UNl'rED STA'll-:sv PATENT oFFlcE ROTARY ELECTRIC SWITCH Milton Zuckerman. New York, N. Y., alaignor to Irving Haal, New York, N. Y.

Application November 26, 1935, Serial No. 51,685 3 Claims. (Cl. ZIN-155) This invention relates to electric switches and there extend auxiliary bores I and l so that the particularly to an improved rotary switch, an respective wires I and II may extend thereobject being to provide asimple construction through andbeconnected by the clamping screws wherein a ring may be grasped and partly ro- I2 and I3 to the ears Il of the respective statated to close or open the switch according to tionary fixed contacts Il and Ii, These conthe direction of rotation. tacts are identical in construction and have their Another object of the invention is to provide contact faces extending into the groove 5 as a rotary switch wherein the switch mechanism shown in Fig. 3. is connected to only one of the wires of a circuit. When the parts are in the position shown in lo A further object is to provide a rotary electric Fig. 3 with the wires I0 and II connected to the 10 switch having a tubular body for receiving a screws I2 and I3, it is only necessary to eleccable carrying a pair of conductors, the same trlcally Connect the two Contacts I5 and I6 in being associated with a rotary switch structure order to close the circuit. This is done by a permanently 'associated with the body and movable contact or closure contact I1 which is formed to rotate in one direction or in either substantially elliptical in shape as indicated in 1;,

of two directions and at certain points of rotadotted lines in F18- 5- Preferebly the movable tion to close en electric circuit. Contact l1 is e comparatively heavy piece of In the accompanying drawing; metal and is provided with an aperture through Fig. 1 is a, vertical sectional view through a which the reduced end I8 of the Screw I9 exrotary electric switch disclosing an embodiment tends. The end portion or extension I8 is upset 20 of the invention; but preferably the movable contact I1 is freely Fig. 2 is a sectional view through the switch rotatable on the extension I8. This permits a shown in Fig. 1, the same being on the line person to use a screw driver in rotating the screw 2 2; I9 to the position shown in Fig. 2 so that the Fig. 3 is an elevation of the body of the switch movable Contact Il willbe engaging the station- 25 shown in Fig. 1; ary contacts I5 and I6. If it is desired to re- Fig. 4 is a perspective view of one of the stamOVe the hand 11D8 4 iS it only necessary to tionary or fixed contacts shown in Fig. 3; rotate screw I9 in a reverse direction and this Fig. 5 is a view similar to Fig. 3 but with the will pull the movable contact I1 upwardly into 3 rotary ring mounted thereon and with a modithe notch 20 of ring 4, whereupon the ring' may 30 ed structure associated therewith; be Sld Off Of the body l. It Will be understood Fig. 6 is a sectional view through Fig. 5 on that the body l may be made from any desired line 6 6; insulating material and also the ring may be Fig. '1 is a sectional view through Fig. 5 on line made from any desired insulating material, aS

1 1; for instance rubber, wood, bakelite, porcelain, or 35 Fig. 8 is a View similar to Fig. 1 but showing the like.

a slightly modiiled construction; When the parts are in the position shown in Fig. 9 is a view similar to Fig. 8 but showing Figs. 1 and 2 the circuit is closed. If the ring a Second modified construction 4 is rotated for a quarter of a revolution or 40 Referring to the accompanying drawing by slightly more, the movable contact I1 will move 40 f numeral, I indicates the body of the switch and out of engagement With the stationary contacts 2 a cable having portions extending into the and thereby the Circuit Will become broken. bore 3 of body I. A rotary ring 4 is rotatamy When it is desired to again close the contact, mounted on body I and positioned centrally ring 4 may be moved book to its former posithereof as illustrated in Fig. 1. When the switch tion or the original rotation may continue until 45 is connected up to be in operative position and the movable contact I1 engages the stationary the current is turned on, it is only necessary to contact from the opposite ends. grasp the ring 4 and move the same to one po- Under some circumstances it may be desirable sition to open the circuit and to move the same to have more than one pair of stationary conto a second position to close the circuit. As tacts in groove 5. This may be done without de- 5o shown in the drawing the ring 4 and associated parting from the spirit of the invention as clearly parts are illustrated with the circuit closed. illustrated in Figs. 5 to 7. In these figures it Body I is not only provided with the bore 3 but will be observed that there are two stationary with an annular groove 5 with notches 6 and 1 contacts I5 and two stationary contacts I6.

offset therefrom. From the notches 6 and 1 The two contacts I5' are connected by a con- 55 ductor 2| vas shown particularly in Fig. l. The contacts II' are likewise connected by a conductor 22. The remaining parts ot the device are the same as the preferred form. vIt will, however, be understood that the movable contact l1 and in fact all parts are proportioned so that contact l1 may be moved completely out of engagement with any oi' the stationary contacts or into engagement with either pair. This structure permits theecircuit to be opened with a comparatively short movement of the'hand ring 4 and also permits it to be closed by a comparatively short movement.

In Fig. 8 a slightly modiiied structure is shown to that illustrated in Fig. 1, wherein a double pole switch formation is presented instead oi a single pole formation. In this form o! the invention there are diametrically opposite movable contacts I'l' so that the circuit( is closed and opened at two points when the ring l is moved to two diilerent positions.

In Fig. 9 a selective pole switch is shown wherein there is provided a common return 23 and two sets of stationary contacts I6". As shown in Fig. 9 one circuit is closed, but ii' the ring l was rotated for a'half revolution the other circuit would be closed and the ilrst circuit opened. This form of switch is good for heating pads and other electrical devices where diii'erent circuits are adapted to be switched on to a given article.

I claim:

1. A rotary switch comprising a tubular body having a peripheral groove in the outer surface, oppositely positioned notches also in the outer surface merging into said groove and an independent auxiliary bore extending from each of the notches to the interior of the body whereby a conductor may extend into the body from each end and then through said auxiliary bores to said notches, a stationary contact having a portion iltting into each of said notches and positioned to engage conductors extending into the notch and portions extending into said groove, a ring surrounding part of said body and covering said groove, and a movable contact carried by said ring positioned to be moved into said groove to prevent displacement of the ring with respect to said body, said movable contact being adapted to be moved along said groove to a position between said stationary contacts to electrically connect the same.

2. A rotary switch comprising a hollow body having an annular groove in the outer surface and passageways extending from the interior to the groove, a pair of contacts arranged in the groove and positioned opposite each other with portions extending into said passageways, a rotatable ringy having a bore of slightly greater diameter than s aid body normally covering said groove. a movable contact adapted to be moved by said ring into and out of engagement with said stationary contacts. and a screw member carried by said ring for moving said movable contact into and out of said groove. said screw normally suspending said movable contact in said grooves so that the contact may act to hold said ring against displacement in respect to said body.

3. A rotary switch for electric wires comprising an elongated body circular in cross-section formed with a longitudinally positioned bore ex.- tending from one end to the other for receiving the ends of electric wires, an annular groove substantially midway between the ends of said body in the outer surface merging into a notch on each side of the groove and diagonally extending auxiliary bores extending respectively from said notches to said longitudinallypositioned bore, a stationary contact positioned in said annular groove on each side thereof, each of said contacts having an extension, the respective extensions projecting into the respective notches, a clamping screw for each of said extensions for connecting conductors to said extensions and for clamping said contacts rmly to said body, a ring having a bore of greater diameter than said body positioned to surround part of said body and cover said annular groove and said notches, and a movable contact carried by said ring and positioned to project into said groove for preventing longitudinal displacement of the/ring on said body, said movable contact being of a size .to move between said stationary contacts and engage the saine when the ring has been rotated to a predetermined position.

MILTON ZUCKERMAN.

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