US2447795A - Picking cam and mounting therefor - Google Patents

Description

Aug. 24, 1948.

B. w. BROUWER ET AL PICKING CAM AND MOUNTING THEREFOR Filed May 29, 1947 IN VENTORS BENJAMIN w BROUWER v/cro lg F. SEPAV/CH ATTORNEY Patented Aug. 24, 1948 I Benjamin W. Brouwer, Auburm and Victor F." Sepavich, Worcester, Mass, assignors toC'romp ton & Knowles Iioom Works, a corporation-of Massachusetts Worcester, Maser,

Application May 29, 1947,'se1-ial No. mps

I. Thisinvention relates to improvements in picki-ng' mechanisms for looms and'i't is the general object ofthe invention to provide an improved picking cam and mounting thereforfor the purpose of making the cam: operate more smoothly whenforceis applied'thereto by an actuator;

The picking mechanism for some looms includes a-roelzable shaft carrying/a picker cam the workingsurface of which lies' in the path of a rotating" aotuatororpfcking roili The shaft carries a picking arm which is connected by a sweep stick to thepiclser stick and rocking of the shaft causes the picker arm to operate the pickerstick. As made heretofore the'shafts have" been so mounted that they bend somewhat at the beginning of the picking operation with the result that the first part of the movement of thepi'cking roll along'the camis-inefiective to move. the picker stick.

It is an important object; of the present invention to provide a picking cam so made that it can accommodate a'bearing forthe picking shaft and prevent bending of the shaft incident to engagement of the picking roll with the picking ca m! The entire" time during whichthe picking roll engages the cam" is therefore available for acceleration of the shuttle;

In the type ofpi'cking mechani'sm'already mentioned it is frequently a, difficult matter toreplace.

a broken or worn pickingfcamv dueto the. manner in which the picking shaft is mounted in its. bearings. Itis' another objectof thepresent invent-ion to provide a picking cam including a shoe which can: be readily removed" to permit. easy replacement without removing the picking.

shaft from the. loom. 1 v

It is a further object of the invention to provide a picking cam so. formedthat it can accommodate a. picking shaft bearing, between its ends.

With these and other objects in view which will" appear as the description proceeds, our invention resides in the combinationancl. arrange-.

It supports top and bottom shafts II and I2, re--.

sclaims. (01. 139-147) spective1y,. which are connected by the usual gears l3 and 142' A l'ayl5" is reciprocated backwardly and' forwardly by means of connectors one of which is shown at lfi. A- shuttl'e Sis picked hackrand forth across the lay by. picker sticks one ofwhich is shown at IT. Eachpicker stick is con nected' by asweep stickuliljto a picker arm 19" mounted. on th'e corresponding picker shaftQZO which. extends backwardly .andlforwatdly in the loom. Each shaft ZD'is preferably of rectangular cross section and may have front andback bearings 2ft 'and'lZZj although as will appear. herein; after we are not necessarily limited totheof bearings for the picking shaft shownin Fig.1. Bottom shaft f2 is usually provided with two. oppositely extending. actuator. on sweep arms, but herein we show only one pump arm at. 23' in Figs-1 havingrotatably mounted, thereon a picking, roll. or ball 2'4". The roll moves in av vertical path;and completes a Revolution every secondlpi'ck of the Thorn. Inthe usual type of loom the picking. rolls are alternately operative to pick the shuttle. The matter. thus. far described. is of. common construction. but We. do. not wish to be limited tothebearings. of. the picking shaftor thev particular position'shown for the. bottom shaft l2.

In carrying our present invention into effect we provide an improved pickingcam. designated generally atC and an. auxiliary. bearing Bfor the. picker. shaft. ,2ll'.v Both sides of the 1mm, are. equipped with a cam Clandbearihg B, butthe following. description. will be limited to onesideonly of},the'loom. The bearing 13 has a foot 311 provided with horizontalslots 31. whiehreceivebolts ;32rby means of whichthe bearing istsecurelyfastened. to the. loom. frame; .The slots permita limited amount of horizontal. adjustment of. thebearing- B in;- the; direction of. the lengthoi shaft. 20.; The-bearing. has a. hub, 33 within which is rotatablymount: ed a bushing 34 having a rectangular hole 35 therethrough to fit the shatt 20.. i

. As shown more particularly in Fig. 3' cam G.-

' comprisesthree-parta which are. the cant shoe iitvand two-endplates or collarsikl and. 4-2... shoe is provided with the cam surface 43 which engages the picking roll 24 and extends along a vertical wall 45 provided with a shelf or ri-b 46 formed as shown for instance in Figs. 2 and 5. e Wa l and rib are substantially parallel to the shaft Z0.v

The end plates 4! and 42 are alike and are located on opposite sides of the hub 33. Each end plate has a square hole 41 therethrough which fits the shaft 20, and screws 48 and 49 pass through the wall 45 and into the end plates 4| and 42, respectively, to hold the shoe firmly in position on the end plates. Each end plate has a notch 50 which receives the adjacent part of the angular rib 46. The latter is held tightly in the notches 5B of the two end plates by the bolts 48 and 49. Set screws 5| hold the end plates on shaft 20 with the plates spaced slightly from the bearing and bushing.

In operation, the roll 24 will move in the direction of arrow a, Fig. 1, and after engaging the low side 52 of the cam will ride therealong to the high side 53, thereby depressing the cam. and rockin shaft 20. Because of the fact that hub 33 is located as indicated in Fig. 3 there will be no appreciable downward deflection of that part of the shaft 20 on which the cam C is mounted and as a result picking arm I'9 will move continuously and at the desired accelerated rate to impart correct movement to the shuttle from the time the roll 24 first engages the low point 52 of the cam until it leaves the high point.

, In previous picking motions of this general type the cam has been between the bearings for the shaft 20 with the result that upon initial engagement of the roll 24 with the low point 52 the shaft 20 has deflected downwardly and the first part of the movement of the roll 24 has been lost so far as effective movement of the shuttle is con cerned. By having the, bearing B related to the cam substantially as shown for instance in Figs. 1 and 3 angular movement of the shaft 20 is continuous througihout engagement of the cam with the picking roll.

Continued use is likely to produce wear on the cam necessitating replacement thereof. Under these conditions the bolts or screws 48 and 49 are removed, after which the wall 45 is lifted until rib 46 clears notches 50, whereupon the shoe can be entirely removed from the end plates. By a reverse process a new shoe is attached to the end plates and the cam is ready for use. This operation does not require removal of shaft 20 from bearin 33, nor is it necessary to loosen the end plates. If the bushing becomes worn, one of the end plates is removed to permit endwise sliding of the bushing out of bearing 33.

While we have shown the end plates 4| and 42 as being separate from the shoe 40 it is within the spirit of certain features of the invention to make these three parts in one piece which they in effect are when the screws 48 and 49 are tight. In any event,'the cam 43 or shoe 40 has parts rigid therewith which lie on opposite sides of a bearing for the picker shaft. I

From the foregoing it will be seen that we have provided simple means by which the picking cam can be made to accommodate a bearing for the picking shaft. The bearing is preferably within the limits of the picking cam, or at least between its ends measured in the direction endwise of the shaft 20. As a result of this constrwction the shaft 20 is held against downward deflection at the beginning of a picking stroke and the whole period of engagement of the picking roll 24 with the loam 40 is effective for rocking the shaft 20.

III

4. It will also be seen that when the end plates 4| and 42 are made more particularly as set forth herein they permit removal of the shoe 4!! for replacement purposes without disturbing the bearing 33 or the shaft 20.

Having thus described our 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 we do not wish to be limited to the details herein disclosed, but what we claim is:

1. In a loom provided with a picking shaft, a picking cam on said shaft comprising a cam shoe and spaced end plates rigid with respect thereto secured to the shaft, and a bearing for the shaft between said end plates and secured to the loom.

2. In a loom. provided with a picking shaft, a picking cam on said shaft comprising spaced end plates secured to the shaft and a picking shoe secured to the plates, and a bearing for the shaft between said plates and secured to the loom.

3. In a loom provided with a picking shaft, a picking cam on said shaft comprising spaced end plates secured to the shaft and interlocked with a picking shoe secured thereto, and a bearing for the shaft between said plates and secured to the loom.

4. In a loom provided with a picking shaft, a picking cam on said shaft comprising spaced end plates secured to the shaft, a picking shoe, removable means securing the shoe to said plates, and a bearing for the shaft between said end plates and secured to the loom.

5. In a loom provided with a picking shaft, 2. picking cam on said shaft comprising spaced end plates, removable means normally holding said plates secured to the shaft, a bearing for the shaft between said plates and secured to the loom, and a picking shoe secured to said end plates.

6. In a loom provided with a picking shaft of non-circular cross section, end plates spaced from each other longitudinally of the shaft, removable means normally securing said plates to the shaft, a bushing surrounding said shaft between the plates, a bearin between-the plates for the bushing mounted on the loom, and a picking shoe secured to said end plates.

'7. In a loom provided with a picking shaft of non-circular cross section, end plates spaced longitudinally on the shaft and having non-circular holes fitting the shaft and secured to the latter, a picking shoe secured to the end plates, a bus hingbetween the plates having a hole of non-circular cross section therethrough fitting the shaft, and a bearing for the bushing between the plates and secured to the loom.

8. In a loom provided with a picking shaft, a picking cam on said shaft comprising a cam shoe having a rib thereon extending longitudinally of the shaft, spaced end plates secured to the shaft and having aligned notches receiving said rib, removable means securing the shoe to the end plates, and a bearing for the shaft between said end plates and secured to the loom.

BENJAMIN W. BROUWER. VICTOR F. SEPAVICH.

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