US1376393A - Reversing mechanism for cylinder washing-machines - Google Patents

Description

r. BALZER. I REVERSING MECHANISM FOR CYI.|NDER WASHING MACHINES.

APPLICATION FILED .IUNE 8,1916- 7 1,376,393. Patented May 3, 1921,

6 SHEETS-SHEET I.

' 7 T/izfen for: fimmer F. BALZER.

BEVERSING MECHANISM FOR CYLINDER WASHING MACHINES.

Patented 1133 3, 1921.

6 SHEETS-SHEET 2.

APPLICATION FILED JUNE 8. I916.

i .|1|m1\M *3 5 M9 5 s Q Min K. w R

3? 3.. Q I!!! mmvq E i -v 7 a... IIIHHLW 3 Q g I I H i HIl|||-="' III-I llllllllmllll F. BALZER.

REVERSING MECHANISM FOR CYLINDER WASHING MACHINES.

APPLICATION FILED JUNE 8, I916.

1,376,393. Patelited M313, 1921.

6 SHEETS-SHEET. 3.

WEN

7Zz Z7z 3 I ,Ziz z/ezzzbr F. BALZER.

REVERSING MECHANISM FOR CYLINDERWASHING MACHINES.

APPLICATION FILED JUNE 8,19l6.

1,376,393. Patentd May3,1921.

6 SHEETS-SHEET 4.

F. BALZERf REVERSING MECHANISM FOR CYLINDER WASHING MACHINES.

APPLICATION FILED JUNE 8, 1916.

1,376,393. Patented May 3,1921.

6 SHEETS-SHEET 5.

V ,ZZZ' LEQZZ 7" F. BALZER.

REVERSING MECHANISM FOR CYLINDER WASHING MACHINES.

APPLICATION FILED JUNE 8, I916. 1,376,393. Patented May 3, 1921.

6 SHEETSSHEET 6.

ll IIll IIIIIII I IIIIII ImI IIIIIIIII UNITED srArEs PATENT OFFICE q.

FBI'IZ'BALZER, or cgica'ao, rumors; ASSIGNOR T0 may mean macnmmnr comrm, mn, or cnrcaeo, rumors, A CORPORATION or new YORK,

' imvnnsme 'M onAmsM roa'cvnmnnn was'nme-macnmns.

To all whom it may concern: 7

Be it known that I, FRITZ BALZER,

ject of the Emperor of Germany, residing at Chicago, in the county of Cook and State-" of Illinois, have invented certain new and useful Improvements in Reversing Mechanism for Cylinder Washing-Machines, of which the following is a specification My invention relates, in general, to mechanism for automatically reversing the direction of the moving part of a, machine, and more particularly to mechanism for preit has come to a stop.

In the operation of various machines it is necessary to periodically reverse the-diin an opposite direction.

'rection of an element, such, for instance, as the cylinder of a washing machine. When the power is applied to drive the moving element in a reverse direction before the element has come to a stop, excessive strain is imposed upon the motor and upon the moving parts whose direction of movement is reversed. For example, in a washing machine in which the cylinder'is driven by an electric motor, the current of -wh ich is periodically reversed in order to reverse the direction of rotation of the cylinder,- the. motor is injured by reversing the'current to it while the cylinder continues 'to rotate.

, One object of m invention is to provide mechanical "contro ling means for electri-.

cally or other power driven machines, which means, when combined with a reversible machine, will control the application of i power thereto in a manner to direct the power alternately in opposite directions at the ends of predeterminedperiods of drive, I

: designate similar andthrough the medium of a power-directing member which is moved alternately to two power-releasing positions through the v and described my inventionas applied to a cylinder washing-machine, the cylinder of mediumfo'f an actuator that has'an initial machine imparted movement, followed by a.- self-pro'pelled actuating movement, by which it drives the power-directing member to, its

however, arrested after the initial movement and prevented from releasing power in the new direction until a machine-driven motion-controlled detent has been permitted to retire by the machine coming to rest,

- Specificationof Letters Patent.

Another object of my invention is to pro-1 vide an organization operating as above outlmed, in which the actuator will drive the power-directing member to its intermediate or arrested position, and do so by the first part of the actuators self-propelled movement, so that the arrest of power in one I direction, for instance, by opening an elec- -practical form, and in which Figure 1' is an elevational view of a cylnder washing machine equipped with my invention;

Fig. 2 an enlarged sectionalview through the portion of the casing which incloses the governor, the latter being shown. in elevas tion; p V p Fig. 3 an enlarged cross-sectional view on line 3-3, Fig.4;

, 2- Patented a 3, 1921. I Application filed June s, 1916. Serial no. 102,564.

simple in construction, efficient in operation,

Fig. 4 a plan vv1ew of the reversing mechanism, the top of the inclosing casing being removed; Fig. 5 a cross-sectional view on line 5-5, Fig.4; r

Fig. 6 a detail view showing the cam,

-..actuated circuit controllers;

Fig. 7 a longitudinal section online 7-7, Fig.4, and.

ig. 8 alongitudinal sectional view on line 8-8,-Fig. 41

Similar reference characters are used to parts in the several figures of the drawings.

For purposes of illustration, I have shown which isrotated alternately in opposite div rections by means of an electric motor, the .current to which is periodically reversed. I

My invention, is not, however, limited in its application to any particular machine, but

is capable of use in connection with other -machines., comprising movingeleme'nts, the

direct movement of which is periodically reversed. 1 i

Reference letter A indicates the shell, or casing, of a cylinder washingJ machine, the ends of which are supported y legs a and a A indicates the cover of the casing A,

which may be opened to permit access to the interior of the casing for the purpose of inserting and removin articles in and from the inclosed cylinder B and B designate the trunnlons of the cylinder which pro- 'ect through and are journaled in the heads of the casing A.- G designates the usual cone duits for supplying water and suds to the casing and for permitting their discharge therelrom. D designates an electric motor suitably mounted upon the washin machine, as by means of a pair of rods and D located above the top of the machine and supported at their ends by suitable brackets secured to the heads of the casing. The shaft of the motor D is connected by suitable gearing with one of the trunnions B or" the cylinder, the gearing not being shown in detail as it is inclosed within a suitable housing E.

he washing machine above described does not in itself embody any features of my present invention, more fully described in detail. It is, however, shown in order that the construction and operation of my improved reversing mechanism may be fully understood.

Supported upon the rods D and prelierably adjacent the opposite end of the cylinder A. from the motor D, is a casing F. Any suitable means may be provided for mounting the casing l5 upon the rods, such for instance, as pairs of brackets f and f projecting outwardly from the sides of the casing and overlying the said rods 13* and D 0 U-bolts f extend around the rods D and D and project through holes in the said brackets f and 75'", the upwardly projecting screw-threaded'ends of the U-bolts having nuts thereon engaging the upper surfaces of the said brackets. In order to tightly secure the casing Fto the supporting rods, clamp screws f extend. through the brackets into engagement with the said rods as clearly shown in Fig. 3. The casing F is provided with a removable cover F detachably secured thereto by any suit able fastening means, such for instance, as

, screws F Extending longitudinally through the easing F is a shaft G located intermediate of, and parallel to, therods D and D The shaft Gr is connected with the gearingthrou h which the motor l) rotates the cylinder When the washing machine isof the type having a driving gear wheel" secured'to both trunnions of the cylinder, the shat-t G'may be the usual shaft, in such machines for connecting'the gear wheels at the two. ends of the n'nmhine Suitable bearings g and g surround. the portions of they and hence need not be tacts K and K are alternately notc es ing transversely within the casinfi F and rotatably supported upon a rod One 'end of the rod H is supported in a recess formed in a removable bearing h fixed to one side of the casing F. The other endiof the rod H is supported within a sleeve 7?, projecting inwardly from, and rigidly secured to, the opposite side wall of the easing-Fv i Loosely supported upon the sleeve H intermediate of the inner end of the sleeve h and worm-gear H, is a tumbler, in the form of a hub 5, having rigidly secured eccentr cally thereto a weight J and a camming arm Supported upon the bottom of the casing F, immediately below the weight d, is a fiat s ring P, which serves as a yielding support or the weight when it swings downwardly during the operation of the mechanism.

Pivotalli:I supported within the casing F is a yoke which surrounds and oscillates transversely to the yoke K is provided at the center thereof with cylindrical bearing upon a stud Z, the latter beingsupported by a lug L projecting upwardly from the bottom wall of the casin F. The inner vertical surfaces of the oke are provided with inwardly projectlng cams k and whichare alternatel engaged by a cam j carried by the hub J, intermediate of the same and the weight J Carried by the opposite sides of the yoke K, and projecting outw ly therefrom, are

wedge-shaped. Supported within the opposite end walls of the casing F are pairs of contacts M and M between which the con forced by the oscillations of the yoke K, in a, manner subsequently to be described.

Pins f 7 Jrojecting from a face of the worm-wheel ,on opposite sides of the center thereof, are adapted to pick up the radially projecting cam j on hub d and move it until the weight J passes vertical position or completes the initial movement of the actu ator and releases said-actuator (J, 5 to its self-propelling actuating movement under the force of gravity by which the cam moves against 'ene of the cams 14 ,10 with ample force to snap the switch contact K K from between theterminal blades M or hit and'present the yoke K, which constitutes the power-directing member into intermediate posit on shown in Fig, R. Here it is arrested by the'detent n, which, as herein after described, is retained in the position of Fig, '2 so long as there is motion l the shaft G within the the hub J. The bottom of driven machine. While the parts are in the position of Fig. 7, cam 7', under the influence of the full load of the Weight J, is resting against the cam "70 ready to complete the throw of the yoke k and close the cirsuit in the new direction, by introducing contact K between terminals M whenever the detent n is withdrawn.

Pivotally supported upon the bracket N,

suitably supported within the casing F, is.

a lever N one end of whichrigidly supports a depending detent n, which in one position of the lever N is projected into the path of a stop is projecting" upwardly from the center of the yoke K, The lever N is connected by a rod n with one end'of a lever O fulcrumed upon a bracket 0 secured to the end wall of the casing A, as

shown in Fig. 2. The opposite end of the of the shaft G, adjacent the ring. is a collar 0 having radial lugs, to which are pivotally connected dpairs of links 0, the opposite ends of sai links being pivotally connected with weights 0, said wei hts being provided with shanks pivotal y connected between pairs of lugso upon a collar O fixed upon the end of the shaft G. A spring 0 surrounds the shaft G, intermediate the fixed collar O and the movable collar 0 the tension of which tends to move collar 0 toward the right in Fig. 2

and thereby oscillate the lever O in a direction to swing the lever N away from the yoke K, and remove the detent ,n from the path of the stop is on the yoke.

The operation of the reversing mechanism'above described is as follows:

The motor D rotates the cylinder B,

within the casing A through the train of gears interposed between; the motor shaft and the trunnion B of the cylinder. The shaft (i, which rotates in synchronism with the motor and cylinder, rotatesthe sleeve H through the engagement of the worm G with the worm-gear. H Assuming that the worm-gear H is being rotated (see Fig.

8) in clockwise direction a pin j on-the worm-gear will be moved into engagement with the radially. projecting portion the hub J, and the further rotation o the worm-gear will lift theweight J until it reaches a position slightly beyond the V61" tical, when it will quickly swing by gravity toward the right, and, through the engagement of the cam j with the cam k of the yoke, will oscillate the yoke into the -posithe right.

tion shown in Fig. 7', in which the stop is, through engagement with the detent a, prevents further oscillation of the yoke toward This movement of the yokehas disengaged the contact K carried thereby from thepair of fixed contacts M thereby interrupting the circuit to the motor. During the rotation of shaft G, the centrifu a1 action of the governor causes the weig ts 0, through the pairs of links 0, to retain the sleeve 0 in a position to the left of that shownin Fig. 2, so that the lever O is in a position to permit the lever N to swing downwardly into the position shown in Figs. 7 and 8, in which the detent n is in the path of the stop is. When the rotation of the shaft G ceases," by reason of the interruption of the circuit of the motor through the disengagement of the movable contact K from the fixed contacts M in the manner above explained, the weights are no longer subjected to centrifugal action, and hence the spring 0 moves the collar 0 toward the right (in Fi 2) and thereby oscillates the lever 0 an throu h the connecting rod 72 swings the lever 1 upwardly so that the detent 'n is lifted out of the path of the stop 70. The weight J is therefore permitted tocontinue its downward movement by gravity, so that the yoke K is swung toward the right through the contact of the cam j with the cam 70 Such further movement of the yoke moves thefixed contact K carried thereby into engagement with the pair of contacts M thereby closing a circuit to the motor D to rotate the same in a reverse direction.

After the cylinderhas made a predetermined number of rotations, by the coinci-i dent rotation of the worm-geard-I in a counterclockwise direction, the pin 7 (see Fig. 7 is brought into engagement with the projection j on the hub J, and the weight lifted to a position slightly to the left of the vertical, when it falls by gravity until the cam y' engages the cam 70 on the yoke and thereby oscillates the yoke to a position in which the stop I: thereon engages the right side of the detent a when further oscillation of the yoke will he interrufpted until the detent hasbeen lifted out 0 en-. gagement with the stop through the action astop. From the foregoing description it will be seen that the circuit to the motor cannot be Y of the spring 0 after the shaft J comes to closed to reverse the motor until the cylin- I der has ceased to rotate. Injury to the mo tor, and to the movable parts connected 1 I therewith, incident to applying power to the motor torotate the same in one direction before it, and its driven to rotate in the other direction 1s therefore avoided. v p

I In the operation, by a common source of arts, cease the worm-gear H (see-Fig. 5) is a sleeve P.

V l a slot in the lever as by means 0 a rod S projecting inwardly power, of a plurality of machines, each comprising a movable member the direction of movement of which is periodically reversed, such for instance, as cylinder washing ma- 5 chines, it is desirable that the reversing of no two of the machines should occur simultaneously, inasmuch as the starting of the movable members requires a maximum con sumption of power, and obviously for economical reasons, the periods of such maximum consumption of power should occur serially, and not simultaneously in the several machines. lln my Letters Patent No, 1,238,082, issued August 28, 1917, l have disclosed a system for controlling electrically driven washing machines in which the cylinders, are periodically reversed in succession, the reversal of the motor of each machine being controlled by all of the other machines, so that no two machines can reverse simultaneously. When my present invention is applied to a cylinder washing machine which forms one o i a group of such machines, all driven by the same source of power, it is desirable that circuit controlling means should be provided at each machine for governing the reversing of the other machines in the group so that no two machines may reverse at the same time. ll accomplish this by addin to the reversing mechanism hereinbefore escribed indetail, automatically operated auxiliary circuit controllers, for controlling the circuits which reverse the motors of the other machines.

. Splined upon the sleeve J at the left of Surrounding and secured to the sleeve P, are rings p p pfland 37 each of which is provided with a radially projecting cam. Loosel 1 surrounding the sleeve P is a ring 1), pre erably located intermediate oftwo of the cam rings in order to be longitudinally immovable upon the sleeve P. Projecting radially from opposite sides of the ring ;o are studs P and P, which are surrounded by slots formed in the ends of levers Q and Q respectively. 'The levers Q and Q? are fulcrumed upon brackets g1 and secured within the end walls of the casing Pivotally supported upon the bottom of the casing F, beneath the lever Q is a bellcrank lever B provided with an inwardly projecting end'terminating in the path of the yoke K; The opposite end of the bellprojecting pin-m which engages within a slot in the lever Q}. Pivotally -mounted upon the bottom of the casing F, below the lever Q is a bell-crank lever R one leg of which terminates in the path of the yoke K, while the shorter leg thereof carries an upwardly projectiig stud 1, which engages Pivotally su ported within the casing F,

crank lever B is provided with an upwardly te races therefrom (see Figs. 3 and 8), are two short levers S v and S each of which is provided with an anti-friction roller resting upon a corresponding one of the underlying cam rings on the sleeve P, The levers S and S have secured to their ends upwardly projecting contacts 8 and. 8 over which are supported fixed contacts 3 and The contacts and 3 may be supported within the casing in any suitable manner, as by means of an extension on the bracket N. The con-- tacts s and t cooperate to control an emailiary circuit, such, for instance, as that of the motor of another machine, while cor.-- tacts s and t control a second circuit, such, for instance, as that of the motor of still another machine.

The sleeve P rotates in synchronism with the rotation of the worm-gear H, and as it rotates the cam on the ring p is moved beneath the roller on the lever S thereby oscillating the same upwardly and lifting the contact 8 into engagement with the contact 29. The rotation of the sleeve"? also causes the cam on the ring 39-" to 'ngage the roller of the lever S and lift t e same so as to raise the contact 8 into engagement with the contact 25 The cams on the rings p and 32 are so related to each other, and also to the pin j on the worm-gear H, that contact is not madebetwcen the contacts 8 and 25 or the contacts .9 and 6 or the contacts K and M ,at the sa e time. Consequently the circuits of no tw of the motors of the machines in the group are closed at the same time.

Where the machine is one of. a group of three in order that the circuits of the motors of the other machines may be closed in proper sequence, it is necessary that when the direction of rotation of the sleeve P is ing of the machines in the circuits of which they are located. This is accomplished by providing the second pair of cam rings p and p, the cams on which are so located.

that when the rotation of the sleeve P is reversed they will be brought beneath the levers S and S and lift them in the same sequence that they were lifted by the cams bn the rings 12 and when the sleeve P was rotating in the first direction. The shifting of the cam rings relatively to the levers S and S upon thereversa of the direction of movement of the yoke K is effected by means of the yoke alternately engaging levers R? and R When the yoke oscillates to the left in Fig. 8, it engages the cry end of the lever B and oscillates the same in a direction to swing the lever Q toward rings 1; and 2 beneath the levers S and S. When the yo e is oscillated to the right in Fig. 8 it engages the lever R and oscillates the same, so as to swing the lever Q awa from the worm-gear H, and thereby so shift the sleeve P as to move the cam rings p and p beneaththe levei's S and S It will, of course, be evident that any number of auxilia circuits may be controlled by merely providing additional pairs of contacts similar to s and t and 8 and t and providing additional pairs of cam rings on the sleeve P. It will be further evident that if the machine is to control, and be controlled by the reversing of only one other machine, it is unnecemary to provide more than one cam for closing the auxiliary circuit.

Inasmuch as my. invention resides in the reversing mechanism and not-in the circuits, or in the reversing switches, I have deemed it unnecessary to illustrate and describe the circuits of the. motor D, or of other m tors ofother machines which may be controlled by the auxiliary controllers. In my said coendin application, Serial No. 27,660, I

ave i lustrated and described in detail, an arran ement of circuits and reversing switches for a plurality of inter-controlling motors, but in order that my present invention may be fullydisclosed, it is not necessary that the circuits and reversing switches v should be illustrated or described.

'- to unduly, or any more than is pointed out.

While I have described my invention with more or less minuteness and as being em-. bodied in certain recise forms, yet it will be understood that do not limit myself therein the claims; on the contrary, I contemplate all proper chan es in form,con'struction, and arrangement, tr e omission of immaterial parts, and the substitution of equivalents, as circumstances may suggest or necessity render expedient. I

I claim: H

1. In a mechanism for reversingthe drive of a power actuated machine, a powerdirecting member movable alternately to two power-releasing positions, an. actuator moving in opposite directions for driving said power-directing member and having, in each direction, a machine-im arted initialmovement and a self-propelled actuating move ment from the end of said initial movement,

' and a machine-motion-controlled stog, arresting the ower-directingmember an the actuator a ter the former has reached an intermediate position and after the latter has completed its initial movement.

2. In amechanism for reversing'the drive of a power actuated machine, a powerdirecting member movable alternately to two power-releasing positions, an, actuator movingi'n opposite directions for driving said ower-directing memberand having, in each 'rection, a machine-i par d itial move- -power-directing member and having, in 63f direction a machine-imparted initial movement and a self-pro elled actuating movement from the end 0 said initial movement,

and a machine-motion-controlled stop, arresting the power-directing member and the actuator after the former has reached an intermediate position and after the latter has com leted its initial movement; said actuator eing arranged to move the powerreleasi ig member to said intermediate posi-' tion.

3. Ina mechanismfor reversing the drive of a power actuated machine, a powerdirecting member movable alternately to two power-releasing positions, an actuator moving in opposite directions for driving said ment and a'self-pro elled actuating movement from the end 0 saidinitial movement,

and a machine-motion-controlled stop, arresting the power-directing member and the actuator after the former has reached an ment from the end 0 said initial movement,

and a machi'ne-motion-controlled stop, arresting the power-directing member and the actuator after the former has reached an intermediate position and after the latter has completed its initial movement; said actuator comprisin a weighted lever developing its self-pro e led movement by gravitation and arrange to move the power-releasing'member to intermediate position by the first part "of its gravitating movement and remaining suspended in opposition to gravity when arrested by the .de'tent. g

5. In a mechanism for reversing the drive of a power actuated machine, a power-directing member movable alternately to two power-releasing positions, an actuator moving in opposite directions for driving said powergdirecting member and hay n in each direction, a machine-im arted initial movement and 'a self-pro el ed actuating movement from the end 0 said initial movement, and a machine-motion-controlled.stop arresting the power-directing member and the actuator after the former has reached an intermediate osi tion and after the latter has complete its initial -movement; said power-releasin' member com risin an oscillating yoke aving roug which to move it in opposite directions, and said actuator comprising a lever acting against said cams.

6. la a mechanism for reversing the drive of a power actuated machine, -a power-di-' recting member movable alternately to two power-releasing positions, an actuator moving in opposite directions for driving said. power-directing member and having, in each direction, a machine-imparted initial movement and a self-propelled actuating movement from the end oi said initial movement,

and a machine-motion-controlled stop, a r-i radially ofiset weight which induces the selfpropelling movement of the actuator, and an arm through which it acts against said cams.

7. In a mechanism for reversing the drive of a power actuated machine, a power-directing member movable alternately to two power-releasing positions, an actuator moving in opposite directions for driving said power-directing member and having, in each direction, a machine-imparted initial movement and a self-propelled actuating movement from the end of said initial movement, and a machine-motion-controlled stop, arresting the power-directing member and the actuator after the-former has reached an intermediate position and after the latter has completed its initial movement; said powerreleasing member comprising a yoke pivoted atone end of its vertical axis and having its intermediate arresting position approximately in'equilibrium upon its pivot and its power-releasing positions on opposite sides of said position of equilibrium.

8. In a mechanism for reversing the drive of a power actuated machine, a power-directing member movable alternately to two power releasing positions, an actuator moving'in opposite directions for. driving said power-directing member and having, in each direction, a machine-imparted initial movement and a self-propelled actuating movement from the end of said initial movement, and a machine-motion-controlled stop, arresting the power-directing member and the actuator after the former has reached an intermediate position and after the latter has completed its initial movement; said power-releasing member comprising a yoke pivoted at one end of its vertical axis and having its intermediate arresting position approximately in equilibrium upon its pivot and its power-releasing positions on opposite sides of said position of equilibrium, and said actuator comprising a lever swingupon a fulcrum above the path oi the 131 yo e and acting against opposite sides of theyolre through the medium of cams.

9. in a mechanism for reversing the drive of a plurality of poweractuated machines,

a powendirecting member movable alter latter has assumed se f-propelling position,

and an independent power-releasing member for a second machine, comp-rising a lever and cam connection between said lever and the actuator, positioned to actuate said lever to afiect the second machine before the first-named power-directing member reaches power-releasing position.

10. The combination with a machine comprising a moving member, of an electric motor connected to said member, a circuit controller for reversing the circuit to said motor, means actuated by a predetermined movement of said member for efiecting a reversing movement of said controller, and means controlled by said moving member for retaining said controller in an inoperative position until said member ceases to move.

1l. The combination with a machine comprising a moving member, of an electric motor connected to said member, a controller for reversing the circuit to said motor, means actuated by a predetermined movement of said member for eliecting a reversing of said controller, means controlled by said moving member for arresting thethrow of said controller in an inoperative position until said member ceases to move, and a controller for a second circuit actuated by said means in predetermined relation to said first controller.

12; The combination with a machine comprising a moving member, of an electric motor connected to said member, a circuit controller for reversing the circult to sa1d'mo-' tor, means actuated by a predetermined movement of said member for effecting a v reversmg movement of said controller,

mechanism operable b her for arresting the throw of said controller in an inoperative position until said member ceases to move, circuit-controllers for other circuits than that of said motor comprising fixed and movable contacts, cams actuated by said means for closing the com 'tacts of said controllers in predetermined said movable mem- 1 cams into operative relation to said movable contacts when the circuit to said motor is reversed.

13. The combination with a machine comprising a moving member, of an electric motor connected to said member, a controller for reversing the circuit to said motor, a weight actuated by a predetermined movement of said member for effecting a reversing movement of said controller, a stop for arresting the throw of said controller in an inoperative position, and a centrifugal governor operated by said member and connected with said stop for moving the same out of engagement with said controller only when said member has substantially ceased to move.

14:. The combination with a machine comprising a moving member, of an electric motor connected to said member, a controller for reversing the circuit to said motor, a weight actuated by a predetermined movement of said member for effecting a. reversing movement of said controller, a stop for arresting the throw of 'said' controller in an inoperative position, means for maintaining said controller against said stop, and means for moving said stop .out of engagement with said controller only when said member has substantially ceasedto move.

15. The combination with a machine comprising a moving member, of an electric motor connected to said member, a controller for reversing the circuit to said motor, a weight actuated by a predetermined movement of said member for effecting a reversing movement of said controller, a stop for arresting the throw of said controller in an inoperative position, and means operated by said member and connected with said stop for moving said stop out of engagement with said controller only when said member has substantially ceased to move.

16. In a power-controlling mechanism for a plurality of reversible machines, a powerdirecting member for one machine adapted to assume, alternately, two power-releasing positions for the first machine, an actuator for said power-directing member, a detent arresting said power-directing member and actuator in intermediate position, a second power-releasing member for a second machine, and cam controlling means interposed between said actuato-r-and said second power-directing member; said cam controlling means comprising a plurality of cams movable alternately into controlling relation with the second power-directing member, and each adapted to time the operation of the second powerdirecting member in particular relation to one of the movements of the first power-directing member, and means for shifting said cams to and from operative relation to the second power-directing member.

17. In a power-controlling mechanism for a plurality of reversible machines, a powerdirecting member for one machine adapted to assume, alternately, two power-releasing positions for the first machine, an actuator for said power-directing member, a detent arresting said power-directing member and actuator in intermediate position, a second power-releasing member for a second machine, and cam controlling means interposed between said actuator and said second power-directing member; said cam controlling means comprising a plurality of cams movable alternately into controlling relation with the second power-directing member, and each adapted to time the operation of the second power-directing member in particular relation to one of the movements of the first ower-directing member, and means for shifting said cams to and from operative relation to the second power-directing member, comprising a lever system controlled by the first power-directing member.

In testimony whereof, I have subscribed my nam Y FRITZ BALZER.

Witnesses C. I. BELKNAP, J. E. HonmcANN.

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