US1461942A - Switching apparatus - Google Patents

Description

July 17, 1923. 1,461,942

.W. M. SCCBTT SWITCHING APPARATUS v Filed may 21 1920 5 sheets-sheet 1 INVENTOR.

4 ATTORNEY July 17, 1923. 1,461,942

. W. M. SCOTT SWITCHING APPARATUS Filed May 21 1920 5 Shoets-Shee t 2 IN VEN TOR. 6

BY ammfi (53% 1 ATTORNEY 5 Sheets-Sheet 3 W: 7 M W 4 W w, m MM 5 July 17, 1923.

W. M. SCOTT SWITCHING APPARATUS Filed May 21 1920 51 ATTORNEY Patented July 17, 1923.

UNITED STATES WILLIAM SCOTT, OF .TREDYFFRIN TOWNSHIP, CHESTER COUNTY, PENNSYLVANIA.

SWITCHING APPARATUS.

Application filed May 21, 1920. Serial No. 383,031.

To all whom it may concern:

Be it known that I, WILLIAM M. Soon, a citizen of the United States, residing in Tredyifrin Township, in the county of Chester and State of Penns lvania, have invented a new and useful Witching Apparatus, of which the following is a specification.

My invention relates to automatic switch or circuit breaker structure of the so-called non-closable type of which it is characteristic that an actuating member is controlled, as to its engagement or coaction with the movable switch structure, by a latch or equivalent under control of the electro-responsive means, as a tripping magnet responsive to predetermined electrical condition during existence or continuance of whichthe switch cannot be closed because of actuation or control of the latch or. equivalent.

My invention resides in switch or circuit breaker structure of the character referred to having novel features of construction relating more particularly to the actuating means and the latch connection with the movable switch member.

My invention resides in switch or circuit breaker structure of the character referred to in comb nation with an enclosed housing, with operating and tripping means operable from the exterior of the housing.

My invention resides in features of structure and combination hereinafter described and claimed.

For an illustration of one of various forms my invention may take, reference is which:

Fig. 1 is a side elevational view of the switch mechanism with parts of the housing structure in section.

Fig. 2 is a front elevational view ofthe structure illustrated in Fig. 1, with the door or front wall of the housing removed.

Fig. 3 is a fragmentary side elevational view, on enlarged scale, illustrating the operating and tripping mechanism.

Fig. 4 is a front elevational view of part of the structure shown in Fig. 3.

Figs. 5 and 5 are top plan and side elevational views, respectively. of structure for limiting the movement of the operating member.

Figs. 6 and 6" are side elevational and plan views, respectively, of members comprised in the switch operating mechanism.

Figs. 7 and 7 are plan and side elevational views, respectively, of a member comprised in the latch actuatingmechanism.

Figs. 8, 8 and 8 are plan, side elevational and end views, respectively, of an operating member.

Figs. 9 and 9 are front and edge views, respectively, of stop structure.

Figs. 10 and 10" are side and edge views, respectively, of a member comprised in the latching and operating mechanism.

Figs. 11 and 11 are side and edge views, respectively, of a co-acting latching and operating mechanism.

Figs. 12 and 12 are side and end views, respectively, of housing or bracket structure.

Fig. 13 is a side elevational view of the switch restraining latch.

Referring to the drawings, Figs. 1 and 2, upon a base 1, preferably of slate or other suitable insulating material, are secured the three similar switches A, B and C, each controlling one pole of a three-wire direct current system, three phase or three wire alternating current system, or the like, it being understood, however, that as to many aspects of my invention the number of switches is of no import.

The switches are in general similar, and a description of one will suflice for all. Each comprises main terminal blocks 2 and 3 secured upon the base 1. The upper terminal blocks.2 are held to the base and electrically communicate with the studs 4, extending to the rear of the base 1 within the box or housing 5 to which'the base 1 is secured and by which the base 1 and the parts carried thereby are secured to any suitable support, as a wall, pillar or the like.

Through the conduit or pipe 6 extend the insulated conductors 7, 8 and 9 constitutin service or supply conductors and communlcating, respectively, with the studs 4 of the switches A, B and C.

The lower terminals 3 of switches A and C connect by conductors 10, 10 with terminals of the electro-magnet windings 11, 11, whose other terminals connect, respectively, by conductors 12, 12 with the studs 13, 13 connecting, respectively, with conductors 14, 14. The lower terminal block 3 of the middle switch B is held to the base by and connects with the stud 15, with which connects the v of each switch is the laminated bridging member 18 carried by the arm 19 pivoted at 20 to the bracket or housing 21 carried by the base 1. At 22 the arm 19 is pivoted to the member 23, to which latter there is pivoted at 24 the link 25, pivoted to the base or other stationary member at 26, the link 25 and member 23 forming a toggle structure which is under travelled when the switch is in the circuit closing position indicated in Fig. 1. The members 23 of the three switches are positively mechanically connected to each other by the bar 23 The switches are locked in circuit closing position by the latch 27, pivoted at 20 and engaging and holdin the pin 28 carried by the member 23 of mi dle switch B, andhaving the tail 27, Fig. 13, adapted to be engaged by the latch actuator hereinafter referred to.

Pivoted concentrically with the latch 27 at 20 is the latch actuator 29, comprising, as shown in Fig. 7, two members connected by the cross piece 30, one of the members having pivoted thereto at 31 the roller or equivalent member 32, preferably of fibre or other suitable insulating material, the cross piece 30 being positioned to engage the tail 27 of the latch 27. The latch actuator 29 has tails 29 adapted to be engaged and actuated by the clips or lugs 33 carried by the transversely extending tripper bar structure 34 carried by brackets 35 pivoted to the base 1 at 38; "a

Associated with each magnet winding 11 is a core having pole pieces 36, with which cooperates the armature 37 pivoted at 38. Pivoted to each armature 37 at 39 is the downwardly extended rod 40 having pivoted at 41 at its lower end the sucker element 42 coacting in well known manner with the bottom of the chamber 43 suitably moistened by oil or the like to produce a start-delaying device when the armature 37 is attracted upwardly by the magnet pole pieces.

Secured to the cross bar'23 are the two bracket members 44, to which are pivoted by the ivot pin 45 the ends 46, Fig. 4, ofa rod or ink 47 pivoted at its lower end at 48 to the bar or lever 49 pivoted at 50 and rigidly attached by cross piece 51 to the offset member 52, Fig. 6, which is also concentrically pivoted upon the pivot pin 50 carried by the bracket or housing 53 secured upon the base 1. Secured at the forward end of' the bracket 53, Fig.12, is the plate 54 hav- ,aeneaa ing at its upper end the laterally turned lug 55 and at its lower end the lug 56, lug 56 limiting clockwise movement of the arm 49, by engagement of cross piece 51 with lug 56, as viewed in Fig. 3.

Pivoted to the member 52 at 57 is the arm 58, Fig. 10, having the lugs 59 and 60. The lug 59 limits counter-clockwise movement of the arm 58 with respect to the arm 52, as viewed in Fig. 3, under influence of the tension spring 61 secured at its one end at 62 to the arm 58 and at its other end at 63 to the arm 52. The free end 64 of the arm 58 is operated by the latch actuator 29 through the roller 32.

Independently pivoted on the pin 50 is an arm 65, Fig. 11, having the offset portion 66 having in its lower edge the notch 67 and on the opposite side of the pivot the perture 68. Upon the arm 65 is a laterally "tending lug 69 adapted to engage lug 55 bracket 53 to limit clockwise rotation Qty he arm 65, as viewed in Fig. 3; and on t 1e opposite side is lug 69 to limit movement in opposite side of lug 55. At its lower end the arm 65 has the latching and engaging or operating surface 7 0 adapted to co-act with the transversely extending lug on the aforesaid arm 58.

- Engaging in the notch 67 and aperture 68 in the arm are the lugs 71, 71 on the flattened end 72 of the rotatable tubular member 73, Fig. 8, whose axis coincides with the axis of the pivot 50. Through a hole 74 in the member 73 extends a pin 75 which secures to the member 73 the stop member 76 and also the pivotal shaft? 7 the member 76 having the laterally extending lugs 78, 78 adapted to engage the lugs 79, 79 upon the bearing plate 80', Fig. 9,- secured upon the inside of the wall 81 of the metal housing H carried by or secured to the base 1 and onclosing the switch and circuit breaker mechanism and its control and operating parts. The tubular member 73 terminates at the plate 80, but the shaft 77 has a bearing in the plate 80 and also in the plate 82 on the outside of the wall 81. To the free end of the shaft 77, outside the housing H, is secured. by in 83 the operating lever or crank 84 having the hand grip 85. The lever 84 may be locked in neutral or inoperative positlorf by a padlock embracing the lever 84 and extending through the hole 86 in the member 87 secured to the wall 81, as by the same rivet 88 which secures the plate 80.

The housing H has for its front wall the door 89 pivoted at 90 and adapted to be locked closed by a padlock co-acting with the,inember 91.

Carried by and movable with respect to the door 89 is the push rod 92 for actuating the rod 93, carried bybracket 94 on the bot.- tom wall of the housing H, a spring 95 op- .direction by engagement with the opposite lug 100 guided in a hole in the trip bar structure 34, upward movement of the bar 99 raising the tri bar structure.

Sliding vertica ly on the inner side of the 1 door 89 is the indicating or signal member 101, a portion of which is'viewable through a suitable aperture in the door 89. The member 101 carries the member 102 extending inwardly into the downward path of travel of the pivot pin 45, which accordingly moves the member 101 downwardly, in opposition to spring 103 when the circuit breaker structure is moved to circuit closing position.

Due to the aforesaid motion of the mcmher 101, the aspect of the signal device through the aperture in the door 89 changes, giving an indication of the position of the switches;

If an attempt is made to close the door 89 when the switch is in the closed position, the pin will be found to be disposed in the path of member 102 which is carried by member 101, thus preventing closeure of door 89 until the switching mechanism is first tripped open, as by pushing in on rod 93. With the switching mechanism open, the door may be closed and locked, and the switching mechanism may then be closed by lever 84.

The operation is as follows:

With the parts in circuit closing position as indicated incFig. 1, upon energization of either or both of the magnet windings 11 to or in excess of predetermined degree, as in the case of over load, either or both of the armatures 37 'will be attracted upwardly and engageth'etripping bar structure 34, causing the lugs 33 to engage the tail 29 of the latch actuator 29, causing the same to rotate in clockwise direction, as viewed in Figs. 1 and 7*, its cross piece 30 then engaging the tail 27 of latch 27, causing the latch also to rotate in clockwise direction to free the pin 28, whereupon the switches move in unison to open circuit position under the influence of gravity or suitable spring means biasing them toward open circuit position.

Or the structure may be tripped manually by pushing in uponthe rod 92, whereupon the tripping bar structure 34 is similarly actuated through member 99 first to actuate the latch actuator 29 and then the latch 27.

To reset or close the switches, the crank or lever 84 is rotated in counter-clockwise direction, as viewed in Figs. 1 and 3, from its vertical or neutral position, thereby rotating the tubular member 73 and arm 65 in like direction, bringing the latching and engaging face 70 of member 65 into position indicated in dotted lines, Fig. 3, engagement, upon subsequent clockwise movement of lever 84, with the lug upon the arm 58, which by its lug'59 causes member 52 to partake of like clockwise movement about pivot 50, and the attached arm 49 pulls downwardly upon the link 47, which forces the connecting bar 23*" downwardly and therefore the members 23 of all the switches, causing extension of their toggle structures and movement of their laminated bridging members 18 toward their stationary contacts 2 and 3. This movement is continued until the parts attain'their circuit closing position as indicated in Fi 1, whereupon the latch 27 again engages pin 28 and locks the switching mechanism in circuit closing position.

If, during the closing movement above described, an overload or similar condition should exist upon the circuit, upon close approach to ful circuit closing position the circuit will be closed, as at shunt carbons 0 and 0 before latch 27 engages and locks the structure. One or both of the tripping magnets will then be energized, effecting actuation of the latch actuator 29, which then causes its roller 32 to press upon the curved end 61 of the arm 58, in opposition to spring 61, thereby rotating the arm 58 about its pivot 57 on arm 52 and thereby withdrawing the lug 60 from engagement with the latching-operating face 70 on member 65, permitting lug 60 to rotate past member and its face 70, the members 58, 52 and 49 rotating counter-clockwise, as viewed in Fig. 3, to dotted line position, while the actuating structure, comprising member 65, is still held'by the operator in position similar to full line position. of member 65 in Fig. 3. This tripping of the arm 58 therefore in cffeet unlatches the actuating mechanism from the switch mechanism, and the switch mechanism again flies to open circuit position, the operator being unable to close the switching mechanism, due to the aforesaid non-closable action.

In a struzture of the character herein described, there are, in addition to the op erating means for the movable contact member or structure, a plurality of operating levers, as main operating lever 65 and secondary operating lever 52 disengageable therefrom.

The nonclosable circuit breaker mechanism hereinbefore described comprises, in effect, a switch or circuit breaker unit and a non-closable unit. connected by the link 47. p The switch or circuit breaker unit comprises the movable contact member, the operating means therefor, and the restraining means. The non-closable unit comprises the members or main and secondary operating levers 65 and 52 and the disengageable operating connection between them, whereby when a predetermined electrical condition 4 LILSLQQZ to by the link l7. Such detachment of the non-closable structure or unit is desirable or essential when the circuit breaker operating member, as member 44, does not rotate about a fixed axis. The member 4A, or the pin 45 thereof, does not move in the arc of a circle about any fixed center, but partakes of a more complex movement, as curvilinear but non-circular, due to the arrangement of the links 23 and 25. It will be understood, however, that whatever the nature of the operating structure for the circuit breaker unit, the non-closable unit may be detached therefrom and connected thereto by link 47 or equivalent.

What I claim is:

1. Circuit breaker structure comprising the combination with a movable switch member, of operating means therefor comprising a movable member, an arm pivoted thereon, a latch for locking said switch member in normal position independently of said arm, an actuating member detached from and adapted to thrust against said arm to actuate said operating means, and electro-magnetic means controlling said arm to remove it from the path of said actuating member.

2. Circuit breaker structure comprising the combination with a movable switch member, of operating means therefor comprising a pivoted member, an arm pivoted thereon, an actuating member adapted to thrust against said arm to actuate said operating means, and electromagnetic means controlling said arm to remove it from the path of said actuating member to prevent actuation of said switch member upon occurrence of a predetermined electrical con-' dition.

3. Circuit breaker structure comprising the combination with a movable switch structure, of operating means therefor comprising a movable member, an arm pivoted on said member and having a lugengaging said member for actuating the same, an ac tuating member adapted to engage said 'arm and move the same in one direction only to actuate said operatingmeans, and electromagnetic means for actuating said arm to withdraw the same from the path of movement of said actuating member.

4:. Circuit breaker structure comprising the combination with a movable switch member, of operating means therefor comprising a movable member, an arm pivoted on said movable member and having a lug engaging said movable member for actuate ing the same, a spring biasing said lug toward said member, an actuating member adapted to engage said arm and move the same in one direction only to actuate said operating means, and electro-magnetic means for actuating said arm to withdraw the same from the path of movement of said acuating member'.

5. Circuit breaker structure comprising the combination with a movable switch member, of operating means therefor comprising a movable member, an arm. pivoted thereon, an actuating member pivoted concentrically with said movable member and adapted to thrust against said arm to actuate said operating means, and electromagnetic means controlling said arm to remove it from the path of said actuating member.

6. Circuit breaker structure comprising the combination with a movable switch member, of operating means therefor comprising a movable member, an arm pivoted thereon, an actuating member pivoted concentrically with said member and adapted to thrust against said arm to actuate said operating means, electro-magnetic means controlling said arm to remove it from the path of said actuating member, and rotary means co-axial with said actuating member for rotating the same.

7. Circuit breaker structure comprising the combination with a movable switch member, of operating means therefor comprising a movable member, an arm pivoted thereon, an actuating member pivot ed concentrically with said member and adapted to thrust against said arm to actuate said operating means, electro-magnetic means controlling said arm to remove it from the path of said actuating member, rotary meansco-axial with said actuating member for rotating the same, and means for limiting the extent of rotation of said rotary means.

8. C-ircuit.brcaker structure comprising the combination with a movable switch member, of operating means therefor comprising a movable member, an arm pivoted thereon, an actuating member adapted to thrust against said arm to actuate said operating means, electro-magnetic means controlling said arm to remove it from the path of said actuating member, and a latch controlled by said electro-magnetic means for locking said movable switch member in normal position.

9. Circuit breaker structure comprising the combination with a movable switch member, of operating means therefor com prising a movable member, an arm pivoted on said member andhaving a lug engaging said member for actuating the same, an actuating member adapted to engage said arm and move the same in one member, said arm operable by said latch actuator for withdrawing said arm from co-action with said actuating member, and electro-magnetic means controlling said latch actuator.

11. The combination with a movable contact member of a switch, of operating means therefor, an actuating member for actuating said operating means and dis engageable therefrom, means for restraining said contact member in normal position, electro-responsive means for actuating said. restraining means and for disengaging said operating means from said actuating member, an enclosing housing, means on the exterior of said housing for actuating said actuating member, and means independent of said last named actuating means for actuating said restraining means and operable from the exterior of said housing.

12. The combination with a movable contact member of a switch, of operating means therefor, an actuating member for actuating said operating means and disengageable therefrom, means for restraining said contact member in normal posi tion, e-leotro-responsive means for actuating said restraining means and for disengaging said operating means from said actuating member, an enclosing housing, means on the exterior of said housing for actuating said actuating member throu h a wall of said housing, and means in ependent of said last named actuating means for actuating said restraining means and operable from the exterior of said housing through a different wall thereof.

13. The combination with a movable contact member of a switch, of operating means therefor, a rotatable actuating mem ber for actuating said operating means and disengageable therefrom, means for restraining said contact member in normal position, eleotro-responsive means for actuat ng said restraining means and for disengaging said operating means from said actuating member, an enclosing housing, rotatable means on the exterior of said housing for rotating said actuating member,

and longitudinally movable means operable from the exterior of said housin for actuating said restraining means independently of said eleotro-responsive means.

14-. The combination with a movable contact member of a switch, of operating means therefona rotatable actuating member for actuating said operating means and disengageable therefrom, means for restraining said contact member in normal position, electro-responsive means for actuating said restraining means and for disengaging said operating means from said actuating member, an enclosing housing, rotatable means on the exterior of said housing operative through a wall of said housing for rotating said actuating member, and longitudinally movable means operable from the exterior of said housing through a different wall thereof for actuating said restraining means independently of said electro-responsive means.

15. The combination with a movable con= tact member of a switch, of operating means therefor, an actuating member for actuating said operating means and disengageable therefrom, means for restraining said contact member in normal position, electro-responsive means for actuating said restraining means and for disengaging said operating means from said actuating member, an enclosing housing, means on the exterior of said housing for actuating said actuating member through a wall of said housing, said housing having a pivoted door, and means independent of said last named actuating means carried by said door and operable from the exterior thereof for actuating said restraining means independently of said electro-responsive means.

16. The combination with a movable contact member of a switch, of operating means therefor, a rotatable actuating member for. actuating said operating means and disengageable therefrom, means for restraining said contact member in normal position, electro-responsive "means for actuating said restraining means and for disengaging said operating means from said actuating member, an enclosing housing, rotatable means on the exterior of said housing operative through a wall of said housing for rotating said actuating member, said housing having a pivoted door, and longitudinally movable means carried by said door and operable from the exterior thereof for actuating said restraining means independently of said electro-res ponsive means.

17'. The combination with a base, of a contact member of a switch movable in a plane normal to said base, operating means for said contact member, an actuating member rotatable about an axis parallel to said base for actuating said operating means and disengageable therefrom, electro-responsive means for disengaging said operating means from said actuating member, an enclosing housing, and rotatable means on the exterior of said housing coaxial with said actuating gieember for actuating said actuating mem- 18. The combination ,with the movable member of an electric switch, of an operating member therefor, an arm pivoted thereto and having a lug engaging said operating member to move the same in one direction only, an actuating member independent of said arm for engaging said arm by movement in one direction only to move said operating member, and electro-magnetic means for moving said arm in a direction to remove said lug from said operating member and to remove said arm from the path of said actuating member.

19. The combination with the movable member of an electric switch, of an operating member therefor, an arm pivoted thereto and having 2. lug engaging said operating member to move the same in one direction only, a second lug on said arm, an actuating member independent of said arm for engaging said second lug by movement in one direction only to move said operating member, an extension on said arm, and electro-magnetic means for actuating said extension for withdrawing said second lug from the path of said actuating member.

20. Circuit breaker structure comprising the combination with a movable switch member, of operatin means therefor comprising a movable member, an arm pivoted thereon, an actuating member adapted to thrust against said arm to actuate said operating means, andtripping mechanism comprising a movable member, said arm having a portion extending into the path of said movable member of said tripping mechanism, whereby said arm is moved to position in which it is free from said actuating member. 21. Circuit breaker structure comprising the combination with a movable switch member, of operating means therefor comprising a movable member, an arm pivoted thereon, an actuating member adapted to thrust against said arm to actuate said operating means, and tripping mechanism comprising a movable member, said arm having an arcuate portion extending into the path of said movable member of said tripping mechanism, whereby, said arm is moved to position in which it is free from said actuating member.

22. Circuit breaker structure comprising the combination with a movable switch member, of operating means therefor comprising a movable mem er, an arm'pivoted thereon, an actuating member adapted to thrust against said arm to'. actuate said operating means, and tripping mechanism comprising a movable member and a roller thereon, said menace means, and tripping mechanism comprising a pivoted member and a roller thereon, said arm having an arcuate portion extending into the path of said roller, whereby said arm is moved to position in which it is free from said actuating member.

24. Circuit breaker structure comprising the combination with a movable contact member, of operating means therefor comprising a movable member, an arm pivoted thereon, means for restraining said contact member in normal position independently of said arm, an actuating member moving independently of said arm and detached therefrom and adapted to thrust against said arm to actuate said operating means, and elcctro-magnetic means controlling said arm to remove it from the path of said actuating member. I

25. Circuit breaker structure comprising the combination with a movable contact member, of operating means therefor comprising a-movable member, an arm pivoted thereon, means for restraining said contact member in normal position independently of said arm, an actuating member moving 1n-v dependently of said arm and detached there from and adapted to thrust against said arm to actuate said operating means, and el'ectro-magnetic means for actuating said restraining means and for removing said arm from the path of said actuating member.

26. Circuit breaker structure comprising the combination with a movable contact member of a switch, of operating means therefor comprising a movable member, an arm pivoted thereon, means for limiting pivotal movement of said arm in both directions with respect to said movable member, an actuating member detached from and adapted to thrust against said arm to move it in one direction to engage and actuate said operating means, and electro-magnetic means for actuating said arm in opposite directionto remove it from the path of said actuating member.

27. Circuit breaker structure comprising the combination with a movable contact 'member of a switch, of operating means therefor comprising a movable member, an arm pivoted thereon, means for limiting pivotal movement of said arm in both directions with respect to said movable member, an actuating member detached from and adapted to thrust against said arm to move it in one direction to engage and actuate said operating means, electro-magnetic means for actuating said arm in opposite direction to remove it from the path of said actuating member, and means for restraining said contact member in normal position and operable by said electro-magnetic means.

28. Circuit breaker structure comprising the combination With a movable contact member of a switch, of a pivoted member for operating the same, an arm pivoted on said operating member and adapted to engage and actuate said operating member, an actuating member pivoted concentrically with said operating member and detached from and adapted to thrust against said arm to actuate said operating member, and electromagnetic means for actuating said arm to remove it from the path of said actuating member.

29. Circuit breaker mechanism gomprising the combination with a movable contact member, of operating means therefor comprising a movable member, an arm pivoted thereon, means for restraining said contact member in normal position, an actuating member adapted to thrust against said arm to actuate said operating means, an actuator for said restraining means, said arm having a portion extending into the path of said actuator whereby said arm is actuated by said actuator to position in which it is free from said actuating member;

30. Circuit breaker mechanism comprising the combination with a movable contact member, of operating means therefor comprising a movable member, an arm pivoted thereon, means for restraining said contact member in normal position, an actuating member adapted to thrust against said arm to actuate said operating means, an actuator for said restraining means, said arm having a portion extending into the path of said actuator whereby said arm is actuated by said actuator to position in which it is free from said actuating member, and electro-responsive means controlling said arm and said restraining means through said actuator.

31. Circuit breaker mechanism comprising the combination with a movable contact member, of operating means therefor com-v prising a movable member, an arm pivoted thereon, a latch for locking said contact member in normal position, an actuating member adapted to thrust against said arm to actuate said operating means, a latch actuator, said arm having a portion extending into the path of said actuator whereby said arm is actuated by said actuator to position in which it is free from said actuating mem- 32. Circuit breaker mechanism comprising the combination with a movable contact member of a switch, of a toggle for actuating said contact member, a rotatable member connected to said toggle for actuating said toggle, an arm pivoted on said rotatable member, an actuating member detached from and adapted t thrust against said arm to actuate said toggle through said rotatable member, and electro-magnetic means for effecting movement of said arm from the path of said actuating member.

33. Circuit breaker mechanism comprising the combination with a movable contact member of a switch, of a toggle for actuating said contact member, a rotatable member connected to said toggle for actuating said toggle, means for restraining said contact member in normal position, an arm pivoted on said rotatable member, an actuating member detached from and adapted to thrust against said arm to actuate said toggle through said rotatable member, an actuator for actuating" said restraining means and for efiecting movement or said arm from the path of said actuating member, and electro-responsive means controlling said actuator.

34:. The combination with a movable contact member of a switch, of operating and restraining means therefor, an actuating member for actuating said operating means and disengageable therefrom, electro-responsive means for effecting actuation of said restraining means and disengagement of said operating means from said actuating member, an enclosing housing, means carried by said housing and operable from the exterior of said housing for actuating said actuating member, and manual tripping means carried by said housing and operable from the exterior thereof independently of said actuating means for tripping said con tact member.

35. The combination with a movable contact member of a switch, of operating and restraining means therefor, an actuating member for actuating said operating means and disengageable therefrom, electro-responsive means for effecting actuation of said restraining means and disengagement of said operating means from said actuating member, an enclosing housing, means carried by said housing and operable from the exterior of said housing for actuating said actuating member, and manual tripping means carried by said housing in detached relation to said restraining means and operable from the exterior thereof independently of said actuating means for tripping said contact member.

36. The combination with a switch unit comprising a movable contact member and operating and restraining means therefor, of a non-closable unit comprising an actuated member, an actuating member for actuating said actuated member and disengageable therefrom, means connecting said actuated member with saidoperating means of said switch unit, and electro-responsive means for effecting actuation of said restraining means and for effecting disengagement of said actuating member from said actuated member.

37. The combination with a switch unit comprising a movable contact member and operating and restraining means therefor, of a non-closable unit comprising an actuated member, an actuating member for actuating said actuated member and disengageable therefrom, a link pivoted to said actuated member and to said operating means of said switch unit, and electro-responsive means for effecting actuation of said restraining means and for effecting disengagement of said actuating member from said actuated member.

38. The combination with a switch unit comprising a movable contact member and operating and restraining means therefor, said operating means comprising an operating member movable in'a non-circular curvilinear path, of a non-closable unit comprising an actuated member, an actuating member for actuating said actuated member and disengageable therefrom, means connecting said actuated member with said operating member of said switch unit, and electro-responsive means for effecting actuation of said restraining means and for effecting disengagement of said actuating member from said actuated member.

39. The combination with a switch unit comprising a movable contact member and operating and restraining means therefor, said operating means comprising an operating member movable in a non-circular curvilinear path, of a nonclosable unit comprising an actuated member, ,an actuating member for actuating said actuated member and disenga-geable therefrom, a link pivoted to said actuated member and to said operating member of said switch unit, and electro-responsive means for effecting actuation of said restraining means and for effecting disengagement of said actuating member from said. actuated member.

40. The combination with a switch unit comprising a movable contact" member and operating and restraining means therefor, of a non-closable unit detached from said sWitch unit comprising an actuated member, an actuating member for actuating said actuated member and disengageable therefrom, means connecting said actuated member with said operating means of said switch unit, and electro-responsive means for effecting actuation of said restraining means and for effecting disengagement of said actuating member from said actuated member.

41. The combination with a switch unit comprising a movable contact member and operating and restraining means therefor, of a non-closable unit comprising an actuated member, an actuating member for actuating said actuated member and disengageable therefrom, means connecting said actuated member with said operating means of said switch unit, electro-responsive means for effecting actuation of said restraining means and for effecting disengagement of said actuating member from said actuated member, a housing enclosing said switch and non-closable units, and means carried by said housing on the exterior thereof for controlling said actuating member.

42. The combination with a switch unit comp-rising a movable contact member and operating and restraining means therefor, of a non-closable unit comprising anactuated member, an actuating member for actuating said actuated member and disengageable therefrom, a link pivoted to said actuated member and to said operating means of said switch unit, electro-responsive means for effecting actuation of said restraining means and for eifecting disengagement of said actuating member from said actuated member, a housing enclosing said switch and non-closable units, and means carried by said housing on the exterior thereof for controlling said actuating, member.

4:3. The combination with a switch unit comprising a movable contact member locked in normal position, a toggle link pivoted to ,said contact member, a second toggle link pivoted to said' toggle link and to a fixed member, of a non-closable unit comprising an actuated member, an actuating member for actuating said actuated member and disengageable therefrom, a link pivoted to said actuated member and to said first named link of said switch unit, and electro-responsive means for unlocking said contact member and for effecting disengagement of said actuating member from said actuated member.

4A. The combination with a switch unit comprising a movable contact member and operating and restraining means therefor, of a non-closable unit comprising an actuated member, an actuating member for actuating said actuated member and disengageable therefrom, a link connecting said actuated member with said operating means of said switch unit, and means for effecting disengagement of said actuated member from said actuating member comprising coacting members one of which has an elongated arcuate surface disposed adjacent to and adapted to engage with the other, and electro-responsive means for controlling said restraining means and for effecting engager eer eee g ment of saici (Bo-acting members disengage abie connection betyveen said operating 1esaid actuated member from said actuating vers, and; a pivotal operating connection w member. between said. secondary operating lever and 45. Circuit breaker mechanism oomprissaid toggie.

5 ing a movable contact member, a plural link in testimony whereof I have hereunto toggle co-actin with said contact member afiixedl my signature this 19" day of May, for operating t e same, main and secondary 1929. operating levers, means forming a detach- WILLIAM M. SCQTT.

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