US1565568A - Drop weight for pattern mechanism - Google Patents

Description

Dec. l5,1925- 1.565.568

E. R. HOLMES DROP WEIGHT FOR PATTERN MECHANISM Filed Sent. 22, 1925 Patented Dec. 15, 1925.

UNITED STATES 1,565,568 PATENT OFFICE.

ELBRIDGE It. HOLMES, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMPTON &: KNOWLES LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

DROP WEIGHT FOR PATTERN MECHANISM.

Application filed September 22, 1925. Serial No. 57,905.

v specification.

This invention relates to improvements in drop weights for the pattern mechanism of so-called Knowles looms and it is-the general object of the invention to provide improved means whereby said-weights'may be moved to and held in inoperative position.

In the well-known Knowles head the vibrator connector has a slotted connection with the harness lever and in order to maintain operative contact therewith it is necessary to provide some yielding device which will hold the two members together but permit relative movement of the same as the vibrator lever rises and falls due to the motion of the gear to which it is conif nected. It is occasionally necessary to remove a defective vibrator and under such conditions it is desirable that the drop weights be moved to and held in inoperative position to facilitate removal. It is a more particular object of my invention to accomplish this result by providing each drop weight with a spring plunger having a reduced portion thereof to cooperate with a slotted frame which serves normally to guide the plunger but which'is so arranged as to receive the reduced portion of the latter to hold the same together with the drop weights in raised position.

It is a more specific object of my invention to connect the spring for the plunger to the drop weight to cause the latter to move with the plunger.

'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 forthin the claims.

In the accompanying drawings wherein a v convenient embodiment of'my'invention is set forth,

Fig. 1 is a vertical longitudinal section through a Knowles head motion showing my invention applied thereto,

Fig. 2is an enlarged horizontaljsection on line 22of Fig.1, a a

Fig. 3 is a section on line 33 of Fig. 2,

Fig. 4; is a section on line 1- 1 of Fig. 2, A

and

Fig. 5 -is an enlarged fragmentary elevation of the lower end of the Plunger and spring therefor showing the way in which these parts are connected to the drop weight.

Referring to the drawings it will be seen that I have provided a loom 10 having a head frame 11 on which are mounted upper and lower oppositely but constantly rotating mutilated gear cylinders 12 and 13, respectively. Disposed between said cylinders is the usual gang of vibrator gears 14 one of which is shown in Fig. 1, and each of said gears is mounted on a vibrator lever 15. A pattern chain 16 controls the vertical position of the vibrator levers and the latter move under control of the chain about a heel pin17. Vibrator connector 18 has one end attached as at 19 to the vibrator gear and the other end slotted as at 20 to engage a gudgeon 21 carried by each harness lever 22. Said harness levers are pivoted on the cross'rod 23 and are operatively connected to the harness of the loom. A plurality of drop weights 24, one for each connector 18, are pivoted on a rod 25 extending between the arches of the loom. The matter thus far described is of well known construction and in the operation thereof the vibrator levers 15 will be raised or lowered to bring the vibrator gears into operative contact with one or the other of the oppositely rotating mutilated gear cylinders to the end that the connectors 18 and the harness levers connected thereto may be reciprooated under control of the pattern chain to determine the weave.

My improvements relate more particularly to the plunger rod associated with each drop weight 24 and the manner in which the same is connected to the drop weight and also to the manner-in which it may be moved to inoperative position. In carrying out my invention I provide a plunger rod 30 for each drop weight and the lowerend of each rod is provided with an enlarged rounded head 31 to be received by a depression in cup 32 formed on eachdrop weight 24. The cup has at one side thereof an upstanding lug 33 through which extends the lower end of compression spring 34 which surrounds the plunger 30. The upper end-of each spring 34 presses against a frame 35held in fixed position with respect to the loom and having therein a plurality of openings each provided with a circular portion 36-and a slot 37 communicatingtherewith. Each rod has aslabbed or reduced portion 38 formed intermediate the ends thereof proportioned to be received by the slots 37. The body of the rod is of such diameter as will pass freely through the circular opening 36 but will not pass through the slots 37.

Under normal conditions the springs 34 will press the drop weights 24 against the vibrator connectors 18 but when it is desired to remove the vibrator the corresponding drop weight will be moved into the associated slot 37. That-part of the rod which lies above the slabbed or reduced portion 38 will then engage the top of'the frame 35 and hold the drop weight in raised position. Because of the fact that the lower end of the spring 34 passes through the'lug 33the drop weight will be held in raised position. I find it convenient to so proportion the upstanding tail 39 of the drop weight as to engage the plunger rod and move the j same to the dotted lineposition shown in Fig. 1 with the reduced portion 38 lying in the slot 37. When the vibrator lever is being removed the connector 18 will be raised to the dotted line position shown in Fig. 1 so that it will be free from thegudgeon 21 and be movable endwise out of the head. After a new lever has been inserted in the head the corresponding plunger will be moved away from the slot 37 and will again be operative to hold the connector 18 in proper position.

From the foregoing it will be seen that I have provided a very simple device for raising and holdingthe drop weights of the well-known Knowles head in inoperative position without requiring constant attention on the part of the operator. It will further be noted that the connection be tween the spring and the drop weight is such that the raising of the plunger 30 also raises the drop weight 24 and that-each tail '39 proportioned to move-the plunger associated therewith to inoperative position. Furthermore each plunger is freely rotat able with respect to'its drop weight to permit registry of the slabbed portion-thereof with the slot 37.

Having thus described my invention it will be apparent 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 hereindisclosed but what I claim is:

1. In a-loom pattern mechanism having a harness lever and an operating connector removably attached thereto, a drop weight operating normally to hold the connector and lever in operative relation, yielding means to hold the weight againstthe connector, and a support to hold said yielding means temporarily inposition to relieve the pressure between said drop weight-and-the connector.

2. In a loom pattern mechanisinhaving a harness lever and an operating connector removably attached thereto, a drop weight operating normally .to hold the connector and lever in operative relation, yielding means to hold the weight againsttheconnector, a support 'to hold said yielding means temporarily in position to relieve the pressure between said drop weight and'the connector, and connections between the weight and yielding means to cause said weight to move away from theconnector when said yielding means is moved to relieve pressure on the connector.

3. In a loom pattern mechanism having a harness lever and an operating connector removably attached thereto, a drop weight operating normally to hold the connector and lever inoperative relation, a plunger for the drop weight, a head formed onithe plungerand received by a depression in the drop weight, .a spring surrounding the plunger and extending through a portion of the drop weight, and meansto hold the plunger in position to relieve ,pressure on the connector, the portion of the spring which extends .through the drop weight holding the latter away from the connectors.

4. In a loom pattern mechanism having a harness lever and an operating connector removably attached thereto, a drop weight operating normally to .hold the connector and lever in operative relation, a plunger for the drop weight having a portion of re duced cross-section, a supporthaving a slot located above the normal position of the reduced part of the plunger and-positioned to receive said reduced part of the plunger when the latter .is raised, and yielding means surrounding'theplunger and engaging a portion thereof to hold said plunger against the drop weight, said means being operatively connected to'the drop weightto cause said weight a to, move with i the I plunger.

5. Ina loom pattern mechanism having a harness lever and an operating connector removably attached .thereto, a drop iweight operating normally to hold the connector and lever in operative relation, a plunger for the drop weight having a portion of reduced cross-section, .a support having a slot located above the normal position of the reduced part ofthe plunger'and positioned to receive said reduced part of the plunger when thelatter is raised, and yielding means surrounding the plunger and'engaging a portion thereof to hold said plunger against the drop weight, said means being operatively connected to .the

drop weight to cause said weight to move with the plunger, said plunger being freely rotatable with respect to the drop weight, thereby permitting movement of said plunger to cause the reduced part thereof to register with the slot of the support.

6. In a loom pattern mechanism having a harness lever and an operating connector removably attached thereto, a drop Weight operating normally to hold the connector and lever in operative relation, a spring plunger connected to the drop weight and holding the same against the connector, said plunger having a portion of reduced crosssection, a giveway support for the plunger having an opening therein to receive the plunger and a lesser opening connected to the first opening to receive the portion of the plunger having a reduced cross-section, and a tail projecting from the drop Weight and proportioned to engage the plunger when the same is raised andmove the reduced portion of the plunger into the lesser opening of the support.

In testimony whereof I have hereunto aflixed my signature.

ELBRIDGE R. HOLMES.

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