Патент USA US2112054код для вставки
March 22, 1938. 2,112,054 ‘ c. THUMIM OPERATING MECHANISM 2 Sheets-Sheet l Filed Nov. 19, 1956 Inventor I Car-l Thurnirn, b9 HiJ‘ MZZ-‘JWI’L all ttor-neg. March22, 1938. c. THUMIM 2,112,054 OPERATING MECHANISM Filed Nov. 19, 1956 2 Sheets-Sheet 2 Inventor“ : Car“! Thumi'm, low/Maw His Attor‘ neg. 2,112,054 , Patented'Mar. 22, 1938 ' UNITED STATES PATENT OFFICE 2,112,054 OPERATING MECHANISM 'Carl Thumim, Lansdowne, Pa., assignor to Gen eral Electric Company, a corporation of New York - Application November-19, 1936,- Serial No. 111,709 6 Claims. My invention relates to operating mechanisms, more particularly ‘to those of the solenoid actu ated type, and has'for its principal object the provision of an improved operating mechanism 5 of the ‘aforesaid type which is simple, compact and rugged in construction, emcient, positive and trip-free in operation and which is adapted to apply the‘ operating force directlyto a member to be actuated reciprocally movable in a direc 10 tion generally transverse to the direction of. movement of the solenoid armature or plunger. My invention will be more fully set forth in the following description referring to the accom~ (Cl. 200—.89) chain linkage in its operative position, a bell crank 5 pivotally mounted at 6 is provided at one end as at ‘I with a roller 8. The bell crank is also provided with a loop-shaped guard member 9 which serves to keep the chain linkage within 5 the groove de?ned by the roller. The bell crank 5 is also provided at its opposite end as at In with a roller ll coacting with tripping or re straining means comprising a latch 12 pivotally mounted at l3. The latch is provided with an 10 offset arm M for coacting with the conventional tripping solenoid l5 and is spring biased for re setting at it in a counterclockwise direction panying drawings, and the features of novelty v against the stop member ll. 15 which characterize my invention will be pointed It will be apparent that actuation of the tripout with particularity in the claims annexed to ping solenoid to elevate the tripping plunger l5’ and forming a part of this speci?cation. causes clockwise rotation of the extension l4 and Referring to the drawing Fig. 1 is an eleva movement of the latch 02 beneath the roller ll. tional view partly in section of a solenoid oper Manual tripping of the latch is suitably provided ated mechanism in the operated or “closed” po by means of a lever l8 independently pivotally 2 sition embodying the present invention; Fig. 2 is I mounted at l3 and coacting with a pin l 9 carried a similar view showing the mechanism in an by the extension arm 1 A manually operable intermediate position during the releasing or link 28 is connected to the lever it for rotating _tripping operation, and Fig. 3 is a similar view the latch clockwise in the manner above de showing the mechanism in the “open” and reset scribed. ‘ .positio .. l In the position shown by Fig. l the switch The operating‘ mechanism ,herein described, member is in the operated or closed circuit posi while generally applicable to reciprocally movable tion and is held in'such position against the bias devices, has particular application to electric cir— of a compression spring 20. The chain linkage 3 c'uit breakers wherein a switch member is movable 3 is held under tension by the solenoid plunger % between open and closed circuit positions. In while the solenoid is energized. When the sole such applications the switch member is generally noid is deenergized a prop member 22 pivotally . moved to the closed circuit position against an mounted at 23 is biased as at ‘24 to block and hold opening biasing“ force, such as a compression the solenoid plunger in its lower or operated posi 35 spring, for example, so that the opening stroke is tion. The prop 22 is adapted to abut at its lower automatically accomplished simply by release of end a guide pin 25 extending transversely of the the switch member. In' circuit breaker mecha plunger within a recess in the central part there nisms it is also desirable that the device be trip of and operable within lateral guide plates 25'. free in operation, that is, free to trip and release‘ The bell crank ii, the pivot 6 of which is offset 40 the ‘switch member during any part of the actu with respect to the bisector of the angle de?ned ating or closing stroke. _ by the chain linkage so that the chain tension Referring more particularly to Fig. 1 there is tends to rotate the bell crank clockwise, is re-' shown an actuating solenoid generally indicated strainedwith respect to clockwise rotation by the at l including a reciprocally movable plunger 2 latch l2 as previously described. In‘ this position which is directly connected through a ?exible the solenoid can be deenergized and the switch tension member 3, such as a roller chain linkage member ll held indefinitely in the closed circuit for example, to a reciprocally movable switch 4 constituting the means to be actuated; In the ‘present instance the direction of movement of position. 15 0 30 3. 40. 45 . The releasing or circuit opening operation is initiated by releasing or tripping of the bell the switch member is substantially at right angles crank by the latch it, either by the tripping sole- 50 to the direction of movement of the solenoid hold or manual operation, so that the spring 2l plunger, so that the chain linkage in applying tensioning the chain linkage 3 causes clockwise the actuating force is guided so'as'to de?ne an rotation of the bell crank to the position shown angle of approximately 90 degrees. by Fig. 2. A comparatively sensitive tripping device can be used if desired since the required ' For the purpose of guiding and restraining the 2,112,054 2 tripping force is directly related to the crank lever arm indicated at “a” through which the resultant reacting force at the chain linkage tends to produce clockwise rotation of the crank. Where the lever arm “a” is quite small, the latch releasing force required is obviously small. During the releasing movement of the bell crank a portion thereof at 5’ serves as a cam member for engaging an extension 26 secured to 10 the prop 22. After predetermined rotation of the bell crank the member 26 is cammed so as to move the prop 22 away from the solenoid pin 25. Accordingly the plunger 2; which is normally biased, in addition to the bias of spring 2|, by a '15 spring 21 towards its upper or reset position, is now free to assume such position. It will be apparent that release of the bell crank 5 causes sumcient slack in the chain linkage _ to permit immediate opening movement of the 20 switch member. In addition, the release of the solenoid plunger in response to release of the bell crank causes immediate resetting of the solenoid so that another reclosing operation is dependent only upon resetting of the bell crank and latch. 26 To this end the bell crank is provided with a re setting spring 28 which is tensioned during the opening operation and which functions imme diately to reset the bell crank as illustrated by Figs. 2 and 3 as soon as there is su?icient slack I 30 in the chain linkage. In resetting the'roller II, the bell crank rides over the edge of the latch l2, thereby effecting resetting of the tripping means. The mecha nism illustrated by Fig. 3 is therefore in the com pletely reset position and can be closed by ener gization of the solenoid causing downward move ment of the plunger 2 to the position illustrated by Fig. 1. During the closing operation the bell crank 5 40 is held in the position shown and the chain link— age is guided by the roller 8 so that the actuating force is applied through an angle of 90 degrees without appreciable friction losses. When the plunger 2 reaches the lower position shown by 45 Fig. l the prop 22 is snapped by its spring 24 over the pin 25 so as to block return movement of the plunger except in accordance with a duly initiated opening operation. _ A It will be noted that the mechanism is trip free in all positions thereof during the actuating or closing stroke. That is, actuation of the trip ping mechanism is effective at any time to pro duce su?icient slack in the chain linkage to permit reverse or opening movement of the switch member. It should be understood that my invention is not limited to specific details of construction and arrangement thereof herein illustrated, and that causing release of said guiding means so that the resulting slack in said ?exible member permits reverse movement of said means to be actuated. 2. Operating mechanism comprising actuating means and means to be actuated, a ?exible tension member interconnecting the aforesaid means and adapted to be tensioned by said actuating means for changing the direction of application of the actuating force, means including a crank coact ing at one end with said tension member for guid 10 ing and restraining the same so that said change in direction is of. the order of 90 degrees, and tripping means for releasing said crank so that the resulting slack in said tension member per mits reverse movement of said means to be actu ated. 3. Operating mechanism comprising an actuat ing_ solenoid having a reciprocally operable plunger, a member to be actuated reciprocally movable in a direction generally transverse to the direction of movement of said plunger, a ?exible tension member interconnecting said plunger and said member, a pivoted element including a roller mounted at one end thereof for coacting with said tension member for guiding and restrainingthe i, same along a path of changing direction, actua tion of said solenoid effecting a pull on said ten sion member to move said reciprocally operable member in one direction, and tripping means for releasing said pivoted member so that the result 30 ing slack in said tension member permits reverse movement of said reciprocally operable member. 4. Operating mechanism comprising an actuat ing solenoid having. a reciprocally operable plunger, a member reciprocally movable in a di 35 rection generally transverse to the direction of movement of said plunger, a chain linkage inter connecting said member and said plunger, a bell crank having a roller at one end for guiding and restraining said chain linkage in tension, the 40 pivot of said bell crank being disposed within the angle through which said chain linkage is ten sioned so that the reacting force on said bell crank tends to rotate the same from its restrain ing position, and latching means coacting with the other end 01' said bell crank for releasing the same so that said chain linkage is slackened and ineffective to hold said reciprocally operable member in its operated position. ' , 5. Operating mechanism of the trip-free type 50 for electric circuit breakers comprising a solenoid having a reciprocally operable plunger, a switch member reciprocally operable in a direction generally transverse to the direction of move ment of said plunger, a chain linkage intercon 55 necting said plunger and said switch member, a bell crank having a roller at one end for guiding and restraining said chain linkage along a path defining an angle of approximately 90 degrees, the tension applied by said plunger to said chain 60 changes and modi?cations may occur to one 00 skilled in the art without departing from the ~ linkage in operating said switch member to the spirit of my invention. closed circuit position tending to rotate said bell ‘ What I claim as new and desire to secure by crank to a non-restraining position, a resetting Letters Patent of the United States is: spring biasing said bell crank toward said posi 1. Operating mechanism comprising actuating means and means to be actuated, a continuous ?exible tension member interconnecting the aforesaid means for changing the direction of 70 application of. the actuating force, said- ?exible member being under tension when said actuating tion, a prop member normally restraining said plunger in its operated position, said bell crank being adapted to cause release of said prop in accordance with releasing movement of said bell crank and tripping means coacting with said bell crank for restraining the same and said chain force is applied, means for guiding and restrain linkage'in an operative position, actuation of said ing said ?exible member for effecting the afore-' tripping means causing rotation of said bell crank said change in direction of actuating force, said ,. so that the resulting slack in said chain linkage guiding and restraining means including av crank permits circuit opening movement of said switch having a comparatively small e?'ective lever arm 75 in the operative position, and tripping means member. . 16 31511232542 6. Operating mechanism '10:‘ electric switches comprising an actuating solenoid having a re ciprocally operable plunger, a switch member reciprocally movable in a direction approximately at right angles to the direction of movement of said plunger, a chain linkage interconnecting said plunger and switch member, a bell crank having a guide roller for said chain for restraining said chain along a path generally coincident with the 10 angle between said directions of movement, the pivot of said bell crank being within said angle \ t 3 and onset with mspeet to the bisector of said angle so that tension applied to said chain by said plunger tends to rotate said bell crank from its restraining pwition, and latching means coacting with said bell crank for holding the same in said restraining position, actuation oi said latching means and the resulting slack in said chain link age permitting reverse movement of said switch members ' CARL THUMIM.