US2503409A - Multipole switch - Google Patents

Description

April 11, 1950 E. T. PLATZ ETAL MULTIPOLE SWITCH 3 Sheets-Sheet 1 Filed Oct. 9, 1944 3? INVENTORS.

7T BY 4 {WW 51m JMJ urn/11111111111111! April 11, 1950 E; T. PLATZ E\TAL MULTIPOLE SWITCH 3 Sheets-Sheet 2 Filed Oct. 9, 1944 p 11, 1950 E. T. PLATZ EIAL 2,503,409

MULTIPOLE SWITCH Filed Oct. 9, 194-4 5 Sheets-Sheet 3 w m C as F1 INVENTORS Patented Apr." 11, 1950 UNITED STATES PATENT orrlca Elwood '1. Plat: and Lawrence Mich, alsignors to Bulldog Company, Detroit, Micln, a Virginia E. Fisher, Detroit. Electric Products corporation of West Application October a, 1944, Serial No. 557,883 4 Claims. (or. 200-116) I This application relates to multipolar circuit controllers.

Two diflerent multipolar circuit controllers are disclosed herein and these will now be described upon reference to the appended drawings. In these drawings,

Fig. 1 is a top plan view of one multipolar circuit controller wherein two single pole circuit controller units are arranged side by side; the interior parts are not shown, but the casings and exterior parts of the units are shown;

Fig. 2 is a back view as if in the direction of the arrow 2 of Fig. 1, showing the parts in the on or closed circuit position;

Fig. 3 is an end view as if in the direction of the arrow 3 of Fig. 1;

Fig. 4 is a view like Fig. 2, but showing the parts in the off" or open circuit position;

Figs. 5 and 6 are illustrative views, with the casings removed, showing the parts in the "on" and oiI" positions respectively;

Figs. 7 and 8 are additional illustrative views,"

with the casings removed, showing the parts in the on andfoflf" positions respectively;

Fig. 9 shows a tie-bar per se;

Fig. 10 is a top plan view of a second multipolar circuit controller, wherein two single polecircuit controller units are arranged back to back; the interior parts are not shown, but the casings and exterior parts of the units are shown;

Fig. 11 is a view as if in the direction of the arrow ll of Fig. 10;

Fig. 12 is a view as if in section on line |2-l2 of Fig. 10, but showing the parts in the on or closed circuit position; and

Fig. 13 is a view like Fig. 12, but showing the parts in the "01? or open" circuit position.

Fig. 14 shows a single pole unit, an outside view; i

Fig. 15 is an interior view, in "01! position;

Fig. 16 is an elevation view, in section on line l6l 6, Fig. 15, in "off" position;

Fig. 17 shows a casing, per se;

Fig. 18 shows a. handle, per se;

Fig. 19 is an elevation view in section, on line l9|9, Fig. 15;

Fig. 20 is a view like Fig. 16, in on position;

Fig. 21 is a transverse section view on line 2|-2l, Fig. 15.

In each of the two embodiments shown herein there are a plurality of single pole circuit controller units 8 combined for multipolar operation. In the embodiment of Figs. 1 to 9, the units happen to be side by side, as illustrated best in Fig. '1, whereas in the embodiment of Figs. 10 5c 2 to 13, they are arranged back to back, as illustrated in Fig. 10.

The single pole controller units of the two embodiments are identical and the two embodiments diiler merely in that the units are side by parts which interconnect the units to provide multipolar operation.

We will first describe unit ing and particularly Figs. 14-21. Each unit is practically the same as the switch shown in a prior patent, No, 2,385,727 of September 25, 1945, difiering only in that to the switch of the patent there are added an operating part or pin I02 and an opening I03, both of which will later be described more in detail;

Each unit comprises a cup-shaped casing Ill whose open back is closed by a plate i I. Through the casing project line and load terminals i4 and I5. In the top Of the casing in slides an exposed handle or actuator ll, biased outwardly by spring 3|, and having cams, 62 and H. Within the casing, and secured to the line contact I4 is a stationar contact 44. adapted to be engaged by a contact 48 on the end of a movable contactor 49 to the body part of which is secured, by a pivot pin 5| formed as a rivet, a holding means in the form of a bimetal strip 52 forming a relatively movable part of the contactor. Pin 5| pivotally connects the contactor to a holding plate 53 of insulation. An operating spring 56 engages a lug 58 of the contactor to bias the hook end 60 of the bimetal strip against a holding means for the contactor, namely edge 6| of the holding plate, for latching, and also to bias the contactor to the open circuit or off position when the hook end of the bimetal strip moves from the holding means, the edge portion of the holding plate, as by warping of the strip on overload, or as by being moved manually away from the holding means by movement of the handle downwardly. The operating spring also closes the circuit by moving the contactor upwardly, after the contactor is manually moved clockwise by handle I! so that its hook end once more engages the holding means.

A cam 62 on handle I! may move hook end 60 away from the holding means 6|, the contactor then being rocked in a plane normal to the cover I I, and thereafter being swung by spring 56 on pivot 5|, for circuit opening, moving at that time in a plane parallel to cover I I.

Another cam 1| on handle I! may move plate side in one case and back to back in the other, and in the construction and arrangement of the a single pole controller" per se with particular reference to the drawcontactor which rocks clockwise back to the position wherein its hook end 60 is once more held by the holding edge SI of plate 53, after which, i. e., as soon as handle I 'I is released, spring 55 can move both the plate 53 and contactor 49 to circuit closing position.

A flexible connector 65 connects the bimetal strip 52 to the load terminal I5 to complete the circuit.

As previously stated, the contactor 49 of each unit is provided with a pin I02 arranged to extend through a cutout or opening I03 in the back or cover II of the unit. Parts I02 and I03 are the only parts of the units hereof not found in the unit of Patent No. 2,385,727.

In the embodiment of Figs. 1 to 9 inclusive, the

seat themselves in notches I23 of the enlarged portion or head I24 of the tie-bar I20. When either of the pins I02 moves vertically, as on movement of its contactor to orfrom its holding means, it will cause a corresponding movement of the tie-bar I20 and a corresponding movement of the pin I02 01' the other unit for the same purposes ,that have previously been described with reference to the embodiment shown in Figs. 1 to 9.

The handles II of the two switches of Figs. 10 to 13 are connected by a bridging member I20, fastened by screws I21 to these two handles II, for common manual actuation.

Now having described the circuit breakers herein disclosed, reference should be had to the claims which follow.

two units I are shown as mounted side by side their two pins I02 projecting through the openings I03a of the plate IN and will seat themselves in slots I04 of a tie-bar I05, extending across the covers II of the two units. The tie bar is guided by an appropriate guide I06 and its movement is limited by appropriate stops I06a.

Thus, movement 01' one contactor will move the tie-bar I05 to cause a corresponding movement of the other contactor, efiected in the following manner. Each contactor is mounted, not only to pivot on' the axis of the pin 5|, i. e., swing in a plane parallel to cover II, but also to rock toward or away from cover II in a manner to release the end 6.0 of the bimetal strip 52 from the holding edge 6| of the holding plate 53. Thus, when the hook end 60 of one contactor is moved from its holding means 6|, and subsequently begins to move, under the influence of its spring 56, the free end of its pin I02 will move downwardly and this will lower the tie-bar, whereupon the free end of pin I02 of the adjacent contactor will also be lowered, so as to cause the contactor of that unit to rock in a manner to free its hook end 60 from the holding edge SI of its holding plate 53. Thereupon the spring 56 of the second unit will move its now released contactor rapidly to open circuit or off position.

For manual actuation of the two handles I! in common, there is provided a common manual actuation. lI'hus hinged at I01 to mounting plate I 0| is a handle I08, having a plurality of roller cams I09, each arranged to engage a handle II of a unit whereby all the unit handles I! may be moved down simultaneously by moving down the handle I08 for causing or initiating simultaneous open or closing movement of the contactors of the various units.

It is noted that the tie-bar connects the contactors so that the movement of one from its holding means 6| causes similar movement of the other.

When the units are mounted back to back, as indicated in Figs. 10 to 13, the tie-bar is arranged to slide between the two units. This tie-bar, referenced I20, is mounted to slide in a T-shaped opening I2I of a plate I22, disposed between the backs of the units. The lower or enlarged portion of the opening I2I is in the form of a clear hole through which the pins I02 of the two units project, but from opposite directions. These pins We claim: 3

1. In a multipole automatic circuit controller arranged for opening on all poles when any one opens, several switch contactors, several-operating springs, one for each contactor, several holding means, one for each contactor, and a tie-bar directly connecting the contactors, arranged so thatmovement of one contactor from its holding means automatically moves the other contactors likewise from their holding means, directly through the tie-bar.

2. A multipole circuit controller comprising a plurality of complete and self contained, casing enclosed, assembled single pole circuit controller units, each having its own contactor, its own operating spring, its own and independent contactor holding means, and its own and independent automatic means for moving its contactor from its r holding means, the multipole circuit controller having a means outside of the several single pole circuit controller units for mechanically and directly interconnecting the several contactors of the several units, constructed so that automatic movement of any one contactor from its holding means, in response to a circuit abnormality in the pole controlled by it, will cause a similar movement of the remaining contactors from their holding means by mechanical transmission of that movement of the first contactor to'the remaining contactors, each contactor, as it moves from its holding means, being then moved to open circuit position by its own operating spring.

3. In a multipole automatic circuit controller arranged for opening on all poles when any one opens, several switch contactors, several operating springs, one for each contactor, several holding means, one for each contactor, and a tie-bar directly connecting the contactors, arranged so that movement of one contactor from its holding means automatically moves the other contactors likewise from their holding means, directly through the tie-bar, the controller also having several manual operators, one for each contactor, and a common actuator for moving the several manual operators, simultaneously, each manual operator having a means for moving its contactor from its holding means.

4. A multipole circuit controller comprising a plurality of complete and self contained, casing enclosed, assembled single pole circuit controller units, each having its own contactor, its own operating spring, its own and independent contactor holding means, and its own and independent automatic means for moving its contactor from its holding means, the multipole circuit controller having a means outside of the several single pole circuit controller units for mechanically and directly interconnecting the several contactors oi 5 the several units, constructed so that automatic movement of any one contactor from its holding means, in response to a circuit abnormality in the the pole controlled by it, will cause a similar movement of the remaining contactors from their holding means by mechanical transmission of that movement of the first contactor to the remaining contactors, each contactor, as it moves from its holding means, being then moved to open circuit position by its own operating spring, the controller also having several man ual operators, one for each contactor, and a common actuator for moving the several manual operators, simultaneously, each manual operator having a means for moving its contactor from its holding means.

ELWOOD '1. PLATZ.

LAWRENCE E. FISHER.

. 6 REFERENCES CITED I The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 970,600 Atwood Sept. 20, 1910 1,790,689 Wood Feb. 3, 1931 2,077,321 Harrison Apr. 13, 1937 2,099,585 Von Hoorn Nov. 16, 1937 2,107,246 Jackson Feb. 1, 1938 2,182,864 Frank Dec. 12, 1939 2,343,612 Frank Mar. 7, 1944 2,362,850 Platz Nov. 14, 1944 2,367,382 Taylor Jan. 16, 1945 2,385,727 Platz Sept. 25, 1945

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