US1764092A - Shaper feed mechanism - Google Patents

Description

June 17, 1930.

w. F. ZIMMERMANN SHAPER FEED MECHANISM Filed March 5. 192a 4 Sheets-Shet 1 @31 WWW June 17, 1930. w, zm E M N 1,764,092

SHAPER FEED MECHANISM Filed March 5 1 4 Sheets-Shee 2 W 6 n I T N .3 U) t H H Q u an I "I W I E l L :3 N I H E! w w w F i v I N H I I 0 I i x- 7%! June 17, 1930. w. F. ZIMMERMANN I I SHAPER FEED MECHANISM 4 Sheets-Sheet 3 Filed March 5, 1926 -June 17, 1930. w. FQZIMMERMANN 1 764,092

SHAPER FEED MECHANISM Filed March 5, 1926 4 Sheets-Sheet ,4

Patented June 17, 1930 UNITED SATES WILLIAM F. ZIMMERIi/IANN, 0F IlIAPLEWOOD, NEW JERSEY, ASSIGNOR 'iO GOULD &'

EBERHARD'I, OF NEWARK, NEW JERSEY, A CORPORATION OF NEW JERSEY SHAPER FEED MECHANISM Application filed March 5, 1926. Serial No. 92,561.

This invention is devoted to the organization of shaping-machines with special rela tion to the means for feeding the work. As the work on the table may be narrow or wide and, as the portion to be machined may be near to or far from the main frame, it is customary to provide the ram with corresponding adjustments, 1. e. (l) to vary its overhang, (2) to vary its length of stroke and (3) to vary its frequency of stroke. It is likewise desirable to be able to adjust the length of the feed-stroke of the table so that the tool may take heavier or lighter cuts according to the material and the finish, and it is desirable that the direction of feed may be reversible. It is also necessary that the advances of the work-table shall be made whi e the tool is out of the work and, to attain the utmost smoothness of action, it is desirable that the 'feed'stroke shall start not too long after the tool leaves the work and be completed ust before the tool, again engages the work; this being especially desirable when the strokes of the ram are short in length but rapid in frequency a *e: "are leave only yery short non-cutting oll Jds for accomplishing the advance of thetablc.

The regulation of the length of the feedstroke should be possible without disturbing the timing of the feed with the rain, and to enable the user to attain the maximum feed safe for the work in'hand, he should be able to make the regulation while the machine is running and the hand-grasp should at all times be .free from movement or oscillation. And for structural reasons, the mechanism for converting the continuous motion into the intermittent feed mo tion (as well as its regulating means) should be simple, compact, quiet and in the nature of a self-contained unit. These are within the objectives of this invention.

To keep the pawl always in contact with the ratchet wheel, and to avoid.- starting its advance when not already in tooth-engagement, is an aim of the invention; the regulation or" the length of the feed-stroke being now accomplished, not by swinging the pawl through a fixed len th of arc and lifting it out of engagement during an adjustable portion of its swing, but by regulating the length of its arc of swing yet always keeping it against the ratchet wheel. in the present form, a stationary or inert stop is shiftable into dillerent fi xed positions and it thereby limits the return-stroke of the pawl and thus regulates the extent of the lost-motion between the pawl and an actuator which periodically oscillates through a fixed arc. When the actuator retreats, it is quietly and smoothly followed by the pawl to the extent permitted by the station to w ich the inert stop has been adjusted; vhereupon the actuator continues its retreat unaccompanied and there isno noisy snap-back of the pawl. When the actuator advances,it goes alone until the adjustable lost-motion has been taken up, and

it then pushes the pawl forward to the end of the advanced stroke. The limit of the advance stroke of the pawl always occupies an invariable position, but the limit of the return of the'pawl occupies whatever posi- 'tion has been selected by the adjustment.

This principle, involving an inert stop (adjustable into various positions) cooperating with an actuator to hold a pawl-shifting spring always under restraint, is the basis of one of the objects of the present invention; the spring being-never able suddenly to shift the pawl but restrained to move it no faster than the travel of the actuator. Thus is avoided the objectionable snapback and the action is correspondingly quieted.

In point of general"organization, this invention aims to loeateat the cross-rail (a) a converter for deriving oscillatoryniotion from continuous motion (b) a stationary regulator for determining the amplitude of oscillation and (0) a stationary directional control. Also, it aims, through the agency of a single uni-directional' shaft (extending from the main-frame to the cross-rail) which rotates once for each tool stroke, to convey the motion to the converter.

In a feeding mechanism constructed in accordance with my invention a swivel and spline, shaft has one end thereof connected fixed arc.

to the crank gear mechanism and has the other end. thereof supported on the crossrail. shaft operates a crank mechanism on the cross-rail in accordance with the reciprocating movement of the ram. The crank mechanism in turn oscillates a lever through a The oscillating lever is mounted on a feed shaft adjacent to a pawl lever and 'a stop member. The pawl lever has a portion thereof extending into the path of' movement of a projection from the oscillat- *ing lever so as to be moved by the oscillating lever. A spring member is provided for ex- 5 erting a force tending to'hold the pawl lever in engagement with theprojection from the oscillat ng lever. The stop member, which is"a dju'stable to various positions, serves to limit the movement of the pawl lever with the oscillating lever. The position of the stop member serves to determine the rate of feed as will be explained hereinafter. The pawl lever, through a pawl and ratchet mechanism and a friction clutch, effects intermittent rotative movement of a feed shaft. The feed shaft is connected to the feed screw through a gear mechanism which may be controlled to vary thedirection of rotation of the feedscrew and accordingly to vary the direction of the feeding movements of the table on the rail. The direction. of the feeding movements effected by the table is fcontrolled by a hand grasp having a stationary pivot on the rail :and therlfite. of feeding is controlled by a hand grasp which;

may be operated when'the machine is in operation. 1 V I 7 Other objectsand advantages will bein 7 part indicated in the following description parts throughout all the views, of which:-

I.Figure 1 is an elevationalview of as iaper having a lfeedjniechanism constructed in ac- CQIClance with my invention. Fig.2 is a sectional view along the line 22.of Fig, 1. Fig. 3i's a sectional view alongthe line 8-3 of Fig. 2. Fig. 4 is a sectional view along 'the line H of Fig. 2. Fig. 5 is a sectional view along the line 5-5 of Fig. 2. Fig.- 6

is an isolated view of the oscillating lever looking in a direction opposite to Fig. 5. Fig. 7 is a detailed view of the stop member. Fig. 8 is a detail View of theoscillating lever,

' stop member and the pawl lever.

' Referring to the accompanying drawings and particularly to Fig. 1, ashaper 1 is illus- I The continuously rotating universal movement of the shaft.

trated comprisinga main frame 2, a reciprocating rain 3, and a work-carrying table 4. The rain 3 is reciprocated on suitable ways by means of a rocker arm 5 which is operated in a conventional manner by means of a crank gear wheel 6. A tool-head 7, which is mounted onthe ram 3, carries a suitablecutting tool 8 for operating on the work carried by the table 4. The work-carrying table 4 is mounted on a cross rail 9 and is moved along the cross rail in a horizontal direction by means of a feed screw 10. The cross rail 9 is vertically movable on the main frame of the machine in a conventional manner.

Referring to Fig. 2 of the drawings, the crank wheel 6 is journaled in a hub 12 projecting from the main frame 2 of the machine. gear wheel 6 by bolts 14, one only of which is illustrated, carries a bevel-gear wheel for operating the table feed mechanism. The bevel-gear wheel 15 is secured to the plate 13 by bolts 16, one only of which is shown in Fig. 2 of the drawings. A shaft 17, which controls the stroke of the ram 3 in a conventional and well-known manner, projects through the bevel-gear wheel 15 and the plate 13 and is provided with a bearing in a bracket or housing 2 which is secured to the hub 12. A squared end 18on the shaft 17 is adapted to be engaged by a crank handle for controlling the throw of the rocker arm 5, and accordinglythe stroke of theram 3. A bushing 19 on the shaft 17 and a hand-grasp 20 are provided for preventing longitudinal The bevel-gear vheel 115, which is secured to the plate 13, meshes with a bevel-gear wheel 21 which is connected to a universal shaft 22. A hub portion 23 0f the bevel gear wheel 21 is supported by, a bushing 24 in the housing 2. A suitable" washer or collar 5 l 1. L, J a a 2' 1s provlded between the beve g ar whee 21 and the housing 2 as shown inFig. 2" of allow for the vertical movement'of the crossrail 9 with respect to themain frame 2; An end link 27 of the universal shaft 22 sup- A plate 13,; which is secured to the ported in the casing 26 by means of a bushing 28 and-a crank ar1n29 is secured tothe link 27 by means of a pin 30. The crank I arm 29" is connected to an oscillating lever 31 by means of two pins 32 and 33 and a-link 3i. -:The pin 32 is fixedly secured tothe crank arm 29 by means ofa pin355 'Axbushing 36 is provided for rotativelysupporting the link 34 on the pin 32. Thepin 33 is fixedly mounted in the oscillatinglever 31 and permits free rotative movement of the:

link 84: thereon. The pin 33 not only conf nectsthe'link 34 of the oscillating lever 31" The projecting portion 38 is provided VVlL a suitable cushion 40, preferablyconstru t ed ofleather, for engaging the pawl lover. The oscillating lever 31 is'provided with a bearing in a wall 41 of the casing 26 and the pawl lever 39 is rotatively mounted on a feed shaft 42. The feed shaft 42 projects through the oscillating lever 31 for operating the feed screw in manner to be hereinafter set forth.

Referring particularly to Figs. 3, 5, 6 and 8, the operation of the pawl lever 39 by the oscillating lever 31 will be described. The oscillating lever 31, as above set forth, ries the pin 33, which has a leather cushion for engaging the pawl lever 39. The leather cushion 40 engages a surface 44 on the pawl lever as best shown in Fig. 5 of the drawings. A spring member 45, which has one end connected to the pawl lever and the other end thereof connected to 2. lug 46' on the casing 26, serves to exert a force tending to hold the pawl nember 39 in engagement with the pin 33 on the oscillatin lever 31. The oscillating lever 31 ow through a fixed arc by reason of the continuous rotation of the crank arm 29. The crank arm 29, as above set forth, i co rotated by means of the unive 'al shaft Thus, if the pawl lever 39 is held in engage ment with the oscillating lever 31 at all times by the spring member 45 such pawl lever will effect oscillations through the same are as the oscillatinglever 31. lf-iowever, a stop member 46 is provided for limiting the movement of the pawl lever ith the oscillating lever.

The stop member 46 is rotatably mounted on a hub portion 47 of the pawl lever 39 and worm teeth 48 are formed on the perimeter of the stop member 46, as shown in Figs. 3 and S of the drawings. The worm teeth 48 mesh with a worm 50 which is formed on an adjusted shaft 51. The shaft 51 and the worm 50 serve to adjust the position of the stop member 46 and accordingly to vary the rate of feeding effected by the worlr table 4.. The shaft 51 is journaled in the casing 26, as shown in Figs. 4 and 5 of drawings. and is held against longitudinal movement by means of a shoulder 52, which is formed on the shaft, and a collar 53 which is pinned to the shaft. Ahand grasp 54whichis proided with a knurled end is splined to the shaft 51 and serves as a means for adjusting the rate of table feed. A spring member 526, which surrounds the shaft 51 as shown in Fig. 4 of the drawings, is positioned between a shoulder 57 formed on the hand grasp 54 and a shoulder 58 which is formed on the shaft 51. Such spring 56 serves to exert a force tending to hold the hand grasp in engagement with the side of the casing 26. A pin 59, which is secured to the casing 26, is adapted to enter holes 60 which are formed lated,

through which the pawl lever 39 is in flan e 61 of the hand grasp 54.. The pin oilcooperating with holes 60 serves. to hold the feed adjusting mechanismin any set position. The holes 60 are positioned, in

the, flange 61 to effect. any predetermined rate.

of feed and a scale 62 is formed on the poli neter of the flange 61 to. indicate the rate at which he feed will be effected.

The stop member 46 is provided with a projection 64 for engaging the pawl lever 39. The, pawl lever 39 is provided with a surface 65 having a cushion of any suitable material, such for example as leather 66, for engaging the projection 64. The leather cushions40 and 66, on the pin 33 and the pawl lever 39 are not absolutely essential but serve to insure'more silent operation of the various levers and prevent the clicking noise which otherwise would be produced. The pawl lever carries a, pawl member 67 which is adapted to engage ratchet teeth- 68 formed on the perimeter of a, clutch member 69. Theclutch teeth 68 form a well-known one-way ratchet so that the pawl member 67 only operatively engages the teeth in one direction of movement of the pawl lever 39. Thus, the clutch member 69, is only moved. with the pawl lever 39 when the pawl lever is moved in a counter-clockwise directionas Viewed in Figs. 4 or 5 of the drawings.

A plunger 70, which is mounted in an orifice 71 formed in the pawl lever 39 is held in engagement with the end of the. pawl 67 by means of a spring 72 to hold the pawl member in engagement with the ratchet teeth 63. The clutch member 69 is rotatively mount ed on the feed shaft 42 and is connected by friction means to a driven clutch member 7 6 which is keyed to the shaft 42. A plate 77 is held in engagement with a shoulder 78 on the feed shaft 42 by means of spring members 79 located in holes formed in the clutch member 69. The plate '2'"? is compelled to rotate with the clutch member 69 by means of a pin 80 which is best shown in Fig. 3 of the drawings. The spring members 79 engaging the plate 77 force the clutch member 69 into a cup-shaped orifice formed in the driven member 76 and into f engagement with a leather friction plate The amount of friction produced between the driving and driven members controlled b means of the nut 33 which is threadablv 7 connected to the end OI the shaft 42.

Br1efly revlewing the o eration of the parts so .far described, which are' mount-ed 1n the casing 26, it will be noted the lever 31 is continuously oscillated through fixed are by means. of the constant rote n of the crank lever 29. The constant oscilla the oscillating lever 31 effects oscn' movement of the pawl lever Tl lated,-is determined in accordance with the position of the stop member 46. The stop I member may be so set as to permit the pawl I lever to be held in engagement with the oscillating lever at all times. Insuch case the pawl lever would be oscillated through the same are as the oscillating lever31. Re-

ferring to Fig. of the drawings the operation of the stop member 46 in controlling the arc through whichthe pawl lever 39 is vibrated will be described. In this description it will be assumed the crank-arm 29 is constantly rotated in a counter-clockwise direction as viewed in Fig. 5 of he drawings.

' wheels 91 and 92 on'the feed screw'lO.

bevel gear wheel 90 is fixedly mounted on The counter-clockwise rotation of the crank lever 29 will first cause a movement of. the oscillating lever 31 in a counter-clockwise direction to engage the pawl lever 39 and movesuch pawl lever in a counter-clockwise 7 direction against the tension ofthe spring WVhen the oscillating lever 31 reaches the extreme end of its counter-clockwise movement and starts its return movement in a clockwise direction, the spring member 45 holds the pawl lever 39 in engagement with it. However, the stop member 46 may. be

P set by means of the hand grasp 54; in a position to stop the movement of the pawl member 39 before the oscillating lever 31 has reached its extreme travel in a clockwise stroke of the ram 3. The amount of movement of the pawl lever 39 during the return stroke of the ram is determined in accordance with the position of the stop member 16. In very small feeds the pawl member 39 would only be engaged by the oscillating lever 31 at the extreme end of the return stroke of the ram. i

The feed shaft 42 carries a bevel gear Wheel which meshes with two bevel gear The the feed shaft 42 and the bevel gear wheels 91 and 92 are rotatively mounted on the feed screw 10. FA clutch .member 93 1s splined to the feed screw 10, as shown in Fig. 2 of the drawings, and is provided with clutch teeth 9% and 95 which are respectively adapted to engage clutch teeth 96 and 97 on the bevel gear wheels 91 and 92. Thus, the clutch member 93 may s moved into engagement with'the teeth 96 on the bevel gear wheel91 for rotating the feed screw 10 in one direction and maybe moved into engagement with'the clutch teeth 97 on'the bevel gear wheel 92 for. rotating the feed screw in an opposite direction, The clutch member 93 is shifted on the feed screw 10 by meansof a shaft- 99. An eccentric pin 100, secured to one end of the shaft 99, is

fitted to a groove l01formed in the clutch member 93. The shaft 99 is provided with opening formed in the casing 26, as shown in Fig. 7 3 of the drawings and engages notches 104 formed inthe shaft 99 for bold ing the clutch member 93 in a neutral or an operative position. 1

Reviewing the operation of the feed mechanism it will be noted continuousrotative movement is supplied'from the crank gear wheel 6 to the feed mechanism in the casing 26 by means of the universal shaft 22. Such shaft 22 is rotated directly in accordance with the movement of the reciprocating ram 3. The universal shaft 22 through the crank 29 oscillates the lever 31 through a fixed arc. The oscillating lever '31 oscillates the pawl lever 39 through an arc which isvaried according to the positionof the stop member 46. The stop member 46,-which is controlled by the hand grasp 54, serves to determine the rate of feeding by the work table.

pawl member 67 and the clutch mechanism The pawl lever 39 by means of the COllIPllSlllgllllB driving and driven members 69 and 76 effects intermittent movement of the feed shaft 12. The feed shaft 42 is connected to the feed screw 10 through the bevel gear wheels 90, 91 and 92 for operating the feed screw 10 according to the position of the clutch member 93. Thus, the rate of feed effected by the feed screw lOis controlled by the hand grasp 54 and the direction of feed effected by the feed screw 10 is controlled by the handle 102. Both the hand grasp 54 and the handle 102 are mounted on the cross rail 9.

I Without further analysis, the foregoing will so fully reveal the gist of this invention, that others can, by applying current knowl-' I edge, readily adapt it for various utilizations by retaining one or more of the features that, from the standpoint of the prior art, fairly constitute essential characteristics of either. the generic or specific aspects of this invention and, therefore, such adaptations should be, and are intended to be, comprehended within the meaning and range of quivalen'cy of the following claims 'Having thus revealed this invention, I claim as new and desire to secure the following combinations and elements,;or equivalents thereof, by Letters Patent of the United States 1 1. A shaper a crank-gear wheel; feed means comprising a shaft rotating once for each stroke of the shaper ram and having one end geared'to feed mechanism comprising said crank 'gear wheel and the other e'nd thereof supported on the shaper cross rail; a lever on the cross rail; means operated by said rotating shaftfor oscillating said lever through a fixed arc; a pawl lever mounted on the cross rail and oscillated by said oscillating lever; means mounted on the cross rail for varying the are through which said pawl lever is oscillated; a feed screw for mov the shaper table along the cross net-wheel for intermittently rod d feed at ew in accordance with the movement of the pawl lever; and a bevelgear reverser between said ieet'l-screw and said ratchet wheel.

2. A feed mechanism for a shaper havin a cross-rail; a ram reciprocated by a rotating crank gear wheel, feed means connected thereto and comprising a shaft extending to said cross-rail. and continuously rotated in accordance with the rotation of the crank gear wheel; a lever mounted on said crossrail; means operated by said shaft for oscillating said lever through a fixed arc; pawllever oscillated by said oscillating lever; means for varying the are through which said pawl lever is oscillated; a feed screw; a pawl and ratchet-wheel for operating the feed screw in accordance with the movement of the pawl. lever; and a motion reverser between said ratchet-wheel and said feedscrew.

3. A shaper feed mechanism comprising a crank-gear wheel; continuously rotating shaft having one end thereof geared thereto and having its other end supported on the shaper cross rail; an oscillating lever mounted on the shaper cross rail; a crank mechanism operated by the rotating shaft for oscillating said lever through a fixed arc; a pawl lever mounted on the cross rail and oscillated invariably to the same forward position by means of said oscillating lever; a stop member for limiting the arm through which the pawl member may return; a feed screw for feeding the shaper table along the cross rail; and means for operating the feed screw in accordance with the movement of the pawl lever.

4. A feed mechanism for a shaper having a ram operated by a crank gear wheel and comprising a shaft continuously rotated by.

said gear wheel once for each stroke of the ram; a lever; a cross-rail carrying said. lever; means operated by the rotating shaft for positively oscillating said lever to and fro through a definite arc; a pawl lever moved positively by the oscillating lever during the return stroke of the ram; a spring for causing said pawl-lever to return with said other lever; a stop mounted coaxially with said pawl-lever for limiting the return-movement of the pawl lever; a stationary hand-grasp for shifting said stop about its axis; a feed screw for moving the shaper table along the cross rail; and means comprising a constantly engaged pawl and ratchet-Wheel for operating said feed screw ver mounted on the shaper cross rail; means operated the rotatn'ig sl aft for oscillating the lever through a efinite arc; a pawl lever advanced always to the same foremost station by the oscillating lever during the return stroke of the ram; a spring for keeping said levels in contact during the first por-v tion of the return-strol't'e of said lever; a feed screw for moving the shaper table along the cross rail; and means for operating said feed screw by the pawl lever during the latter part of the ram return stroke.

6. A shaper feed mechanism comprising a ram; a cranlr-gear wheel; a cross-rail; a rotating shaft driven by said wheel and having one end thereof supported on the cross rail; a lever on said cross-rail oscillated through a fixed are by said rotating shaft, a pawl lever rotatably mounted concentric with said oscillating lever and having a portion thereof in the path of movement of a projection from the oscillating lever; resilient means for exertii'ig a force tending to hold said pawl lever in engagement with said oscillating lever; adjustable stop member for limiting the period contact between the pawl lever and the oscillating lever during its return stroke; and a feed shaft intermittently operated by said pawl lever.

7. A shaper feed mechanism comprising a crank-gear wheel; feed means geared thereto and including an unidirectional rotating shaft having one end thereof supported on the cross rail; a lever mounted on the cross rail; means operated by said shaft for oscillating the lever through a fixed arc; a pin projecting from the side of the lever; a rotatable pawl lever mounted concentric with said oscillating lever and having aportion thereof in the pathof movement of said pin; an adjustable stop member also mounted concentric with said oscillating lever for limiting the movement of the pawl lever in one direction; a resilient member for exerting a force tending to hold the aid wheel and rail and connected to said table; a universal shaft rotated in a uniform direction by said crank gearwheel; a feed shaft mounted on the cross rail and adapted to be connected 'to said feed screw; a lever mounted concentric with said feed shaft and oscillated through a given are by means of said universal shaft; a pawl lever rotatably mounted on said feed shaft and oscillated through various arcs by means of said lever; a stop rotatably mounted on said pawl lever for controlling the oscillating movement of the pawl lever; resilient means for exerting a force tending to hold the pawl lever in engagement with the stop and in position to be engaged by the oscillating lever; a worm and worm-wheel for shifting said stop; and means controlled by said pawl lever for op erating the feed shaft to effect feeding movement by the feed'screw.

9. A shaper feed mechanism comprising a shaft continuously rotated in one direction once for each stroke of the shaper ram; means for converting said rotary movement of the shaft into oscillatory movement at a point on the cross rail; stationary means comprising a worm on the cross rail for varying the arc of said oscillatory movements to vary the feeding rate; and means operated by said oscillatoryumovements for effecting feeding movements of the work table in either direction.

V In witness whereof, I have hereunto subscribed my name. I

7 WILLIAM F. ZIMMERMANN.

CERTIFICATE OF CORRECTION.

Patent No. 1, 764,092. Granted June 17, 1930, to

WILLIAM F. ZIMMERMANN.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 5, line 40, claim 3, for the word "arm" read are; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed thi s 9th day of September, A. D. 1930.

M. J. Moore, (Seal) Acting Commissioner of Patents.

(Seal) CERTIFICATE OF CORRECTION. Patent No. 1,764,092. Granted june. 17, .1930, to WILLIAM F. ZIMMERMANN.

It is hereby certified that error appears. in the printed specification of the above numbered patent requiring correction as follows: Page 5, line 40, claim 3, for the Word "arm" read are; and that the said Lette erein that the same may conform in the Patent Office.

This certificate supersedes Certificate of Correction issued Sept-ember 9, 1930. Signed and sealed this 23rd day of September, A. D. 1930.

M. J. Moore, Acting Commissioner of Paten'ts.

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