US1793175A - Controller for driving mechanism - Google Patents

Description

Feb. 17, 1931. E, R. HOLMES 1,793,175

CONTROLLER FOR DRIVING MECHANISM Filed Jan. 14, 1930 O 0 mm B 3) m mnmu o I s5 f/v l/E/VTUH ELBR/DGERHUL M55 ATTDFPNE Y5 Patented Feb. 17, 1931 UNE'FF.

SiTfitTES ELBRIDG-E R. HOLLIE3, (3F .R QRCESTER, FIASSACHUSETTS, ASSIGNGR 'ZO CROMPTON KNOWLES LOOEE EVQRKS, 03E \VUECESTER, ldIASSAGl-LUSETTS, A GURPORATION OF MASSACHU$ETTS Application filed January 14, 1930. Serial No. 420,789.

of looms which employ the socalled forward pull shipper handle. In looms of this type it has been customary heretofore to employ a jointed connection operating somewhat after the manner of toggle joints, being so con- 'structed as to hold the driving and driven elements together by means of a yieldable lock. Because of this arrangement stopping of the machine brings about first a straightening of the toggle which temporarily increases the pressure between the driving and driven surfaces, this pressure, however, be-

relieved as soon as the jointedconnections move to stopping position. There is, however, an interval at the beginning of the knocking-oil stroke when the pressure is increased rather than relieved. It is an important object of my present invention to provide mechanism of this general class but so arranged that the toggle lock will become immediately effective to lessen pressure between the driving and driven surfaces without the objectionable delay due to the increase mentioned.

It is a further object of my present inven-- tion to provide a shipping or control lever with a pivoted member having inclined surfaces which cooperate with a fixed operating or stop element such as a stud to move the member to lever lockin osition when ower 2-.

is to be transmitted, and effective by aslight pressure on the lever to bring about unlocking when the driving members are to be disconnected. V

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

Fig. 2 is a top plan view taken in the di rection of arrow 2, Fig. 1,

Fig 3 is a fragmentary view similar to Fi on an enlar ed scale showing certain parts hereof on an enlarged scale and with the arts in stopping position, and

F d is a view similar to Fig. 3 but with the parts in driving position.

Referring to Figs. 1 and 2, I have shown a machine frame such for instance as a loomside 10 which supports a driving shaft 11. lhe latter h as secured thereto a gear 12 having a friction surface 13 to coo aerate with a corresponding surface 1 1 provided on the driving gear 15 loose on the shaft. A bracket 16 secured to the loomside has pivoted there to a rocking lever 1'? operatively connected to the gear 15. The la ter may be rotated in any approved manner as by an electric motor pinion not shown and is capable of sliding int driving engagement with the surface 13 action of the lever 1'? A small hellcranlr lever 18 is pivoted to the bracket 16 and has a forwardly extending rod 19 which when moved forwardly or to the left operates to disengage the driving surfaces.

The forward portion of the 100111 is provided with a shipper shaft 20 to which is secured a shipper lever or handle 21 pivotally connected as at 22 to the forward end of said rod 19.- The shipper handle has a depending arm 28 carrying the pivot 22 and adapted for engagement with a fixed stop 24.

order to illustrate the manner of actuating the shipper handle so "as to effect stopping of the machine automatically Ihave set forth a lay 25 from the lower forward portionof which projects a dagger 26. The latter is adapted for engagement with a knockoff lever 2'? having a portion extending in front of the shipper lever. Under certain conditions, such for instance as failure of the shuttle to be properly boxed or breakage Inthe accompanying drawings, wherein a of the filling laid by the shuttle, the dagger 26 will be moved into position to engage the lever the lay moves forwa'dly or to the left, thereby causing the lever 27 to move the shipper handle from the left position shown in Fig. 1 to the right or in a clockwise direction around the shipper shaft 20. When this motion on the part of the shipper handle talies place the rod 19 will be moved forvardly, thereby moving the driving gear 15 away from the friction surface 12.

The matter thus far dos ribed is of common construction in looms more p rticularly of the sill: or worsted type and forms no part of my oresent invention, except as hereinafter oescribed.

In carrying my invention into effect I provide the lower part of arm with a stud 30 around which a control member 31 may swing as a pivot. The member is provided with a stop car 32 adapted to engage the stud 22 to limit angular movement of the member 31 in a counterclocl:wise oircction with respect to the shipper handle. A pivot 33 is provided on the member for t 10 left hand end of a push rod Set having a collar 35 to receive the for-- ward thrust of a compression spring 36. The rod passes through an adjustable but n rmally fixed guide bracket 3'2.

Lying between the stud 30 and the pivot is a slot having substantially parallel sides which are oblique with respect to a line joining the centers of the stud 30 and pivot 33. An operating or stop element 38 which is nor mally linen and mounted on stand 39, which can be adjusted as to position as set forth is positioned to enter the slot. The left side of the slot has a surface 4:0 while the opposite side of the slot has a preferably parallel sur face 4-1. the slot terminating the upper CDC thereof in a surface l2 which may engage element 33 to limit angular movement of control. member 31.

ll hen the d iving and driven members disconnected or in stopped position, the parts will be in the posi ion shown in Fig. 3 with the operating element or stop 38 out of the slot but positioned to engage surface 4.0. [is the shipper handle is pulled forwardly arm 23 and control member 31 will move as a without relat've angular motion this position or condition of balance being maintained by the spring 36. is soon as the surface 40 the fixed operating element the iiLiu however, the member 31 will begin to rote ab .ut the stud 30. Up to this time the ring has had control over the shipper lever dete mine the position of the latter, but the t. pivot starts to move downwardly orce exerted by the spring will more ear v approach the center of the stud 30.

its the shipper handle continues to be moved, forwardly or to the left the angular rlation between the surfaces 40 and 41 and the n 23 and also the aforesaid line changes. its soon pivot passes below this line of force the spring 36 will start to expand, causing urface ll to slide over the operating element 38. As the pivot moves down the line of force will pass below the stud 3 ii. time no in this movement of the member 31 '11: force of the spring will be balanced by our opposing force developed .1 between surface and the stop The stop surface 41:2 may engage the ttlll 38 to limit movement of the c mtrol member, but 1 1nd in experience that the suri ace 1" L 1- al vs in engagement with the ssh i 3 s om ruining. hen in this posi- G will act as a yielding loclr to 1e several )arts in the balanced rela ion .hown in 4, which corresponds to "be running position.

he ceg'ree of loclt n'iay be varied by changlocation of the operating); member 38,

i also the friction bee itud and surfac ll. When the s arsed the lock 0 :omes more sensi- 1 it be lowere the loclc is more amount of motion of the shipper the horizoni secure. ilie handle or lever is controlled by tal position of the stud i -Then it is red to stop he machine the operal will per or d of the ship- -.-.'ard push, or to the it should be noted with respect to 41 1s obl que 1 ssingiirom the center or the .gtrd l the ,euide and for this rea on ett or so mgto l pivot llf'fOS it will oi d the oppoi'n assume 1 1 tore, which are unab to turl'he' rest am the 1. l 36. whereupon the latter will spring swing: the opei g member around t :e stud 30 to move the same the position shown Y 3.

i its motion until c 21., after which the 1 I .n clocltwis l m emei eiilect t'orwaro o. 1

From the torcgomp; 1-1 will be seen tha l l whereby a have provided a sirri i e means slight rearward movement of the shipper handle wil disturb the existing co idition oi balance of forces and thereby permit the 36 to start the shipper lever on its .nent toward stoppin position. It will be noted that this action takes place without a temporary tightening of the friction surfaces 13 and M- as has been the case in existing constructions of this type. It will further be seen that the spring 36 which acts to hold the shipper lever in normal. running position is the means which also moves the lever to stopping position and that the line of force ted by thisspring, not normally being directed to one side of the pivot 30, "rea-tes a balanced condition with the shipper lever either in running or stopping position, It will also be seen that the inclined surface 41 plays an important part in the movement of the shipper lever to stepping position witl out causing the previously referred to temporary increase in pressure between the drivfriction surfaces.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. In a control device for driving mechanism, a shipper member to be normally in running position and movable to stopping position, a device exerting aforce in the direction in which the shipper member moves when moving from running to stopping position, a fined stop exerting an opposing force to overpower the force exerted by the device and retain the member in running position, an element pivoted to the member and receiving the thrust of the force exerted by the device, and a surfaceon the element, said first named force holding the surface against the stop and said surface being inclined relatively to a line joining the pivot of the element and the point of application of the first named force to the element and away from the pivot of the element, the operator when giving the member a slight movement toward stopping position thereby adding a small force to the first force so that these two forces overcome the second force and'move the memher to stopping position.

2. In a control device for driving mechanism, a shipper lever movable about a fixed,

center, driving means controlled thereby, a control member pivoted to the shipper lever, a yielding pressure element, a pivotal connec tion between the pressure element and the control member, a guide for the pressure ele ment through which the latter slides as the control member moves, fixed operating ele ment, and means on the control member defining a surface cooperating with the element and oblique with respect to line j oinin g the pivot of the pressure element and the pivot of the control member, the pressure member exerting its force along a line passing to one side of the pivot of the control member under normal running conditions, the pressure member, yielding as the shipper lever starts its movement toward stopping position because of the cooperation of the inclined surface and the operating element.

3. In a control mechanism for driving devices, a pivoted shipper lever, a control device pivotally mounted on the shipper lever, a pivotal connection between the control member and the shipper lever, a fixed stop,

approach thepivotal connection, said pres sure element thereafter moving the control member and shipper lever to stopping position and causing the inclined surface to slide along the fixed stop.

4;. In a control mechanism for driving clevices, a pivoted shipper lever, a control device pivotally mounted on the shipper lever, a

pivotal connection between the control memher and the shipper lever, a fixed stop, apressure element acting on the control member and exerting thereon a force which passes to one side of the pivotal connection, stopping surfaces carried by the control member and held in engagement-withthe fixed stop under normal running conditions by the pressure element, said surfaces including a portion inclined with respect, to a line joining the pivotal connection and the point at which the force of the pressure element is exerted on the control member, the shipper lever when moving slightly from running toward stoppingposition causing movement of the control member due to coaction of the inclined surfaceof the fixed stop to cause the line of force exerted bythe pressure element to approach the pivotal connection, thereby causing said inclined surface to slide along the fixed stop under action of the pressure a condition of balance with the shipper lever in running position, said surface being inclined with respect to a line oining the pivotal connection and the point at which the force of the pressure element is exerted on the member, said force being directed in a direction to one side of the pivotal connection, said stop and inclined surface being so related that a slight movement of the shipper lever from running toward stopping position causes a movement of the inclined surface along the stop to produce pivotal movement of the member and cause the line of force exerted by the pressure element to approach the pivotal connection, thereby destroying the previously referred to balance and causing the inclined surface to slide along the stop and effect movement of the shipper lever in a direction toward stopping position.

6. In a control mechanism for driving devices, a pivoted shipper lever, a control device pivotally mounted on the shipper lever, a pivotal connection between the control iember and the shipper lever, a fixed stop, a pressure element to exert a force on the control member, means defining a pair of substantially parallel stop engaging surfaces which are oblique with respect to a line joining the pivotal connection and the point of application of the force of the pressure element, the stop under normal running conditions engaging one of said surfaces to hold the control member so that the line of force of the pressure element passes to one side of the pivotal connection and holds the control member and shipper lever in driving relationship and in a state of balance, movement of the shipper handle toward stopping position causing relative movement between the stop and one of the inclined surfaces to rock the control member against the action of the pressure element and move the line of force of the latter toward the pivotal connection, said element thereafter moving the control member and shipper lever to stopping position with the member and lever in a diiferent relation corresponding to stopping position, said shipper lever when being returned to running position from the stopping position causing engagement of the other of said surfaces with the stop to effect return of the control member to a position relative to the lever which corresponds to running position, this returning movement of the control member causing the line of force exerted by the pressure element to pass from one side to the other side of the pivotal connection.

In testimony whereof I have hereunto affixed my signature.

ELBRIDGE R. HOLMES.

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