US500167A - Resawing-machine - Google Patents

Description

(No Model.) 5 Sheets-Sheet 1.

A. SURERUS & W. P. GREENHILL. RESAWING MACHINE.

No. 500,167. Patented June 27, 1893.

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(No Model.) 5 Sheets-Sheet 2.

A. SURERUS & W. -P. GREENHILL. RBSAWING MACHINE.

No. 500,167. Pa-tented June 27, 1893.

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RESAWING MACHINE.

Patented June 27, 1893.

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5 Sheets-Sheet 4. A. SURERUS & W. P. GREENHILL. RESAWING MACHINE.

Patented June 27, 1893.

- (No Model.) 5 Sheets-Sheet 5.

A. SURER'US & W. P. GREENHILL. RESAWING MACHINE.

No. 500,167. Patented June 27,1893.

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PATENT RESAWlNG-MAQHINE.

SPECIFICATION forming part of Letters Patent No. 500,167, dated June 27, 1893.

Application filed November 10, 1891. Serial No. 411,469. (No model.)

To all whom it may concern.-

Be it known that we, ALBERT SURERUS and WILLIAM P. GREENHILL, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Resawing-lvlachines; and we do hereby declare the following to be a full, clear, and eX- act description of the'invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference markedthereon, which form a part of this specification.

Our improvement relates to a machine for sawing blocks of wood into relatively small strips of uniform thickness. Our machine is automatic in its operation. It is designed specially for sawing strips of wood to be usedin the manufacture of lead-pencils and other like purposes requiring a precise thickness of the pieces of wood.

The machine comprises a saw, a carriage reciprocating automatically parallel to the plane of the saw, and automatic feed-mechanism supported by said carriage for feeding the block of wood forward into the path of the saw.

In the accompanying drawings-Figure 1 is a plan of the machine embodying our improvement. Fig. 2 is afront elevation. Fig.

' 3 is a vertical section in line a-b of Fig. 1.

Fig. 4 is a plan of the carriage with a portion of the feed mechanism exposed. Fig. 5 is a section in the line ac of Fig. 4:. Figs. 6, 7, and 8 show details of the flexible lever which constitutes a partof the feed mechanism. Fig. 9 illustrates the pawl for progressing the follower. Fig. 10 showsa modification ofthe mechanism for progressing the follower.

In said drawings, A is the main frame, and B is the supplemental or carriage-supporting frame. Said supplemental frame is shown supported by the main frame A and provision is made for a vertical adjustment of the supplemental frame on said mainframe. A vertical member B constitutes a part of the supplemental frame B and is applied fiatwise to one side of the main frame A and secured thereto by bolts B extending through slots B A screw B may extend through a portion of the frame A below the middle of the memberB' of the frameB and in contact with said member, by means of which the frameB may be raised or lowered when the bolts B are loose. Thus all the mechanism supported by said supplemental frame maybe raised or lowered with reference to the frame A and the mechanism supported by said frame A.

C is the saw. This is supported upon the shaft C which is in turn supported in bearings A A. A band-wheel C is mounted upon the shaft C to receive a band for the rotation of said shaft and saw.

13 B are ways on the supplemental frame B parallel to each other and the plane of the saw 0.

D is the carriage. This is provided with feet D D extending downward into the ways B so that said carriage may be reciprocated upon said supplemental frame in a direction parallel to the plane of the saw C. This reciprocation is effected automatically, as follows: An arm D is hinged by its upper end to the bottom of the carriage D and by its lower end to a roller D which latter is confined in a vertical way D A pitman D is jointed by one end to the middle of the arm D and by the other end to the wrist-pin d on the crank-wheel D Said crank-Wheel is mounted on a shaft D which is supported in the frame B and which supports at its end opposite the Wheel D a spur-gear D which spur-gear meshes into a spur-gear D on the driving-shaft D also supported by the frame B. Upon the drivingshaft D are mounted a fixed band-wheel D and a loose bandwheel D for receiving a belt for driving the carriage D and the feed-mechanism supported by the carriage. The rotation of the shaft- D will obviously lead to the rotation of the crank-wheel D and the reciprocation of the pitman D and, since the shaft D is hinged to the carriage D in the manner described, it follows that the upper portion of the shaft D and the entire carriage D and the parts supported thereby will be reciprocated upon the ways B through a distance greater than the diameter of the circle described by the wrist-pin d Upon the carriage D are fixed two guides which are vertical, parallel to each other, and at right angles to the plane of the saw and far enough from each other to receive between'them the blocks which are to be resawed. F is such a block.

G is a follower arranged to move along above the face of the carriage D behind the block F to advance the latter after each cut made by the saw.

G is the follower-stem. dove-tailed channel, G in the upper face of the carriage D.

G is a frictional presser finger'secured by one end to the carriage D and bearing with its other end upon the upper face of the follower-stem G, in order that said stem and follower may not shift unless acted upon positively by the feeding mechanism or by theattendant. But, since the upper face of said follower stem is a plane surface, the followermay be moved in either direction by applying positive force, without lifting the presser finger.

H is a stop arranged parallel to the saw at the side of the latter opposite the table D away from said saw a distance equal to the thickness of the strips to be cut from the block F. Said stop'is supported on a standard H rising from the frame A. A vertical adjustment for said stopmay be. provided by applying to said standard l-I'a piece H by means of a bolt H extending through relatively large openings h3 in said standard H and said piece H A horizontal adjustment of the stop H may be afforded by providing the piece H and the stop with horizontal meeting faces and a bolt h extending through relatively large openings h in said stop and said piece 11*. By means of this vertical adjustment, the stop may be made to conform. to the height of the carriage D when the latter is varied by a vertical adjustment of the supplemental frame B, as already explained. By means of the horizontal adjustment of the said stop, the machine may be set for sawing thin or thick strips from the blocks F.

The mechanism for automatically progressing the follower toward the stop H is located in and beneath the carriage D. At the front of the follower-stem G, the carriage D is provided with a recess d, as shown in Figs. 4 and 5, and covered with a plate (1, as shown in Fig. 1. Said recess extends below the level of the follower-stem sufficiently to receive a block I with its upper face below a portion orall of the side of the follower-stem, so that a portion or all of the side of said follower-stem is exposed above said block. Upon said block is mounted one or more pawls I on a vertical post i, so that the pawl or pawls will turn in a horizontal plane. The point of said pawl is directed forward toward the follower and the adjacent sideof the follower-stem and pressed again st the latter by means of a spring I secured to said pawl by one end and bearing by the other end against a post i rising engagement with said teeth. Said block I is "This rests in a shorter than the recess d but fills the latter transversely excepting toward the top, as already stated, so that said block may be reciprocated longitudinally. From the foregoing it will be understood that the reciprocation of said block I will cause a forward movement of the follower G,*for when said block is pushed forward toward the follower, said pawl will engage theteeth gand cause said follower and follower-stem to move toward the saw, while on a reverse movement of said block I the pawl will drag over the teeth 9 'without sufficient engagement to move the follower and follower-stem in the reverse direction. This reverse movement is the more certain] y precluded by the pressure of the prcsser-' justing-screw I extending through the left end of the carriage into the recess cl and into the path of the block I. The teeth g extend only far enough toward the left end of the follower to insure themovement of the latter only to but not intothe path of the saw.

it is a rocking member securedbetween its ends flatwise beneath the follower to a relatively fixed portion of the carriage at a point 1 and one end ofsaid rocking-member is hinged to the block I at I and the other end is hinged to a reciprocating shaft 1 at I Said reciprocating shaft 1 extends into the path of one end of a rocking member 1 which is pivoted'at its middle to a relatively fixed portion of the supplemental carriage at I", and the opposite end of'said member reaches into the path of a cam-face l on the crank-.

wheel D. When said cam-face passes-the lower end of said member 1 said lower end is thrown toward the right or head of the machine and the upper end of said member is thrown toward the left or foot of the machine and against the reciprocating shaft 1, so that the latter turns the member I upon the pivot at 1 whereby the block I and pawl l are thrown forward. When said cam-face I has passed said member 1 the coiled-spring 1 presses the block I backward or toward the left and reverses the movement of the member I and the reciprocating shaft 1". The cam face I is so timed as to operate the pawl or pawls I immediately upon the completion of the forward movement of the carriageD in response to the action of the crank-wheel D and the pitman D for at this time the block F is forward out of the range of the saw so that it may be moved against the strip H with out touching the saw. The distance to which the shaft 1 and the rocking member I are adapted to throw the pawl I is a little in excess of what is required to progress the block F for cutting the thickest strips, so that the follower will always tend to push the block Ffarther than required for the desired thickness of cut and fartherthan permitted by the attached against the spring S so as to bend sooner stop H. But the train of connection between the wheel D and the pawl I is made yielding atany suitable point to such a degree as that when the blockF has been driven against the stop 11 so that the follower G can progress no farther, said connection will yield in response to the power, transmitted from the wheel D all the parts between said yielding pointand the pawlI' remaining stationary and the parts between said point and the wheel D moving as before. Figs. 6, 7, and 8 show said yielding point in the locking member 1 said member being divided transversely into two sections 2' hinged to each other by the bolt 1. The spring S secured by one end to the side of one of the sections i opposite the reciprocating shaft 1 and hearing by its opposite end against the corresponding end of the other section i normally keeps said sections 2' in line, as shown in Fig. 6. But when the follower meets the resistance of the stop H, the reciprocating shaft 1 forces the section 1' to which said reciprocating shaftis directly the latter and permit the movement of said sections i and said. reciprocating shaft without moving the other sections i and the pawl 1'. Thus the reciprocating shaft 1 may always make a stroke which is slightly in excess of what is required for shifting the followerthe desired distance, and if the strips cut from the block F are to be thin,only a limited portion of the stroke of the reciprocating shaft l willbe actuallyused. The same result may be accomplished by making said reciprocating shaft yielding. Such a modification is shown in Fig. 10, in which said reciprocating shaft is divided into two sections 1;, one of which is hollow and opens toward the other and contains an expanding spring .9 and receives the end of the other section. Ordinarily said spring 8 will be expanded so that said reciprocating shaft will be of full length, but under excess of pressure said spring will become compressed so that the section 2' which is toward the head of the machine will progress toward the foot of the machine while the other section i remains motionless. Thus it will be seen that we use an automatically disengageable means for progressing the follower G.

It will be observed that the drawings show no attachment between the reciprocating shaft 1 and the rocking member 1 On the contrary, one only abuts against the other. This construction is adopted for the reason that the rocking member 1 is relatively stationaryupon the supplemental frame B, while the reciprocating shaft 1 travels back-andforth in a horizontal plane with the carriage D, the relative position of these parts being such as to bring said reciprocating shaft and said rocking member opposite each other into proper relation for engagement only when the out has been completed and the carriage D has been shifted forward to its full limit. On reflection, it will be understood that no engagement between said rocking-member and said reciprocating shaftis required excepting when the carriage D is at its forward limit;

eration, but becomes entirely disconnected during each reciprocation of the carriage D.

O is a key extending into the recess at through the end of the carriage D the farther from the saw 0 in close proximity to the pawl I at the side of the latter opposite the follower-stern G. When said key is pushed inward it comes intocontact with the adjacent end of the said pawl and forces said end toward and the opposite end from the followerstem, so that said stem is no longer engaged by said pawl and may be retracted by the hand of the attendant to make room to set the follower to receive a new block F.

In addition to the guides E E and the follower G for controlling the block F, we have provided automatic, intermittent means for pressing and clamping said block F down upon the upper surface of the table D.

JJ are fingers resting with their front ends upon the block F and secured by their rear ends to the shaft J which is mounted in bearings J on the guides E E.

. J is a rod arranged parallel to the rod J and extending through or attached to the fingers J J and projecting at the front through the adjacent finger J and resting above the adjacent guide E. A'coiled spring J surrounds the shaft J and is engaged by one end with the guide E or other relatively fixed part of the carriage and by the other end I with the shaft J and bears downward upon said rod J sufficiently to turn said fingers J downward and clamp them upon the upper surface of the block F. Under these conditions, the block F is engaged at all sides, This clamping of said block by the downward pressure of said fingers is particularly helpful in maintaining the fixed position of said block while the saw is making a out. It will be seen that a strip cannot be accurately cut from said block unless the latter is maintained in a fixed position with reference to the carriage D. But this clamping must cease after a out has been made by the saw, in order that the follower G may progress said block into new contact with the stop H, and must then be resumed. VVehave provided automatic means for raising said fingers J immediately after each cut is completed and before the pawl I is set into motion for progressing the follower G. For this purpose a train of mechanism is arranged between said fingers and the crank-wheel D.

J is a vertical post extending loosely through the laterally-directed flange E at the top of the front guide E, the bearing end of said post being directly beneath the end of ITO the rod J while the other end is directly above a horizontal lever J free at the end which is below said post and hinged by the other end to the side of the guide E at J J 8 is another vertical post located below the lever J and extending loosely through the carriage D to a point a little above the sup-- plemental frame B.

J 9 is a vertically-reciprocating shaft resting upon the periphery of the crank-wheelD and arranged to be engaged by a cam-face J on said periphery, and preferably provided at its lower end withan anti-friction roller 7' and confined by a plate J which is secured to the supplemental frame B. At its upper end said shaft J extends to the level of the lower end of the post J 8 and stands directly beneath the latter when the carriage D stands at its forward limit of movement. Consequently, the post J lever J post J arm J and fingers J are raised when the carriage D has arrived at its forward limit of movement and at the time when the follower G progresses the block F into contact with the stop H. The length of the cam'face J is sufiicient only to cause said fingers J to be raised during the interval required for such progression of the block F. It is to be noted that there is no permanent connection between the post J 8 and the shaft J and such a connection is not desired, for the post J 8 travels back-and-forth horizontally with the carriage D, while said shaft J is relatively stationary. Thus saidpost and said shaft come into line with each other only once during each reciprocation of the carriage D.

L is a finger secured to the upper portion of the guide E and extending toward the stop H and thence downward past the end of the guide E in a plane between the plane of the saw and the adjacent face of the stop H, so that said finger may rest in contact with, the portion of the block F which is being cut from said block. The purpose of this finger is to avoid the strip being cut from the block from breaking or splitting 0d before the saw has quite completed the cutting. Said finger also serves to insure the delivery of the strip beyond the saw at the rear of the-machine.

We claim as our invention- 1. In a re-sawing machine, the combination with a saw supported from relatively stationary bearings, of a stop located at one side of the saw in a direction perpendicular to its axis andin a plane parallel to the plane of the saw, a carriage arranged to automatically reciprocate in adire'ction parallel to the plane of the saw at one side of the latter opposite said stop and provided with automatic yielding feeding mechanism forintermittently progressing the block to be re-sawed against said to said main frame, a carriage mounted upon said supplemental frame and provided with automatic mechanism for reciprocating it in a direction parallel to the plane of the saw, and automatic feed mechanism for intermittently progressing the block to be re-sawed toward the saw, substantially as shown and described.

3. In a machine for re-sawing, the combination with a main frame supporting a saw, of asupplemental frame secured adjustably to said main frame,acarriage mounted upon said supplemental frame and provided with automatic mechanism for reciprocating it in a direction parallel to the plane of the saw, and automatic feed mechanism for intermittently progressing the block to be re-sawed toward the saw, and a stop for limiting the progres-- .sion of said block, substantially as shown and described.

4. In a re-sawing machine, the combination with a saw supported from relatively stationary bearings, of a stop located at one side of the saw in a direction perpendicular to its axis, a carriage arranged to automatically reciprocate in a direction parallel to the plane of the saw at one side of the latter opposite said stop, guides located upon said carriage,

5. In a re-sawing machine, the combination with a saw supported from relatively stationary bearings, of a carriage arranged to automatically reciprocate in a direction parallel to the plane of the saw, a follower G having a stem G provided with teeth 9, a shiftable pawl I normally in engagement with said teeth, and automatic yielding mechanism for reciprocating said pawl, and a stop H arranged in due relation to said saw and said follower, substantially as shown and described.

6. In a re-sawing machine, the combination with a relatively movable saw and support for the block to be re-sawed, of a follower confined in a way at right angles to the plane of the saw, a movable pawl for progressing said follower, a key for forcing said pawl out of engagement with said follower, yielding mechanism for reciprocating said pawl, and a stop arranged in suitable relationto said saw and said follower, substantially as shown and described.-

IIO

7. In a re-sawing machine, the combination with a saw supported from relatively stationary bearings, the carriage D for carrying the bTock to be re-sawed, a stop arranged in suitand said stop during the movements of said carriage, substantially as shown and described.

8. In a re-sawing machine, the combination with the saw 0, and stop H, and a support for the block to be re-sawed, of a follower G arranged in suitable relation to said support in a way perpendicular to the plane of the saw, and a yielding automatic reciprocating pawl for progressing said follower, of a frictional device for pressing upon said follower in order to prevent the movement of said follower without the application of positive force thereto, and yet permitting movement of the follower in either direction perpendicular to the plane of the saw when positive force is applied, substantially as shown and described.

9. In a re-sawing machine, the combination with a support for the block to be re-sawed of the follower G, and yielding follower-progrossing mechanism arranged in suitable relation to said follower and comprising a reciprocating shaft 1, a rocking member, 1 arranged in suitable relation to said reciprocating shaft, and mechanism for actuating said rocking member, substantially as shown and described;

10. In are-sawing machine, the combination with the carriage D supporting the block to be re-sawed and the follower G and a yielding follower-progressing mechanism comprising a reciprocating shaft, 1 and a rocking memher, 1 arranged in suitable relation to said reciprocating shaft and mechanism for actuating said rocking member, substantially as shown and described. 1

11. In a resawing machine, the combination with the carriage D arranged to be reciprocated in a direction parallel to the plane of the saw and for supporting the block to be remember, 1 arranged to stand in opposition to said reciprocating shaft, 1 when the carriage is at one side of the saw in a direction perpendicular to the axis of the saw, and mechanism for at such time actuating said rock- .ing member,.substantially as shown and described.

12. In a re-sawing machine, the combination with the carriage D for supporting the block F, and carrying it parallel to the plane of the saw, a follower for progressing said block perpendicularly to the plane of the saw, and yielding mechanism for periodically progressing said follower, of pressing mechanism located above the position for said block and normally bearing toward the carriage D, and lifting mechanism also supported by said carriage in such relation to said pressing mechanism as to lift the latter when said lifting mechanism is raised, and movable mechanism located upon the frame of the machine independent of said carriage in such position as to adapt it to lift said lifting mechanism when said carriage is in the position requiring the progression of said block F toward the plane of the saw, substantially as shown and described.

13. In a re-sawing machine, the combination with the guides E and a support for the block to be re-sawed, of pressing mechanism located above the space for said block, and the camfaced crank-wheel D and reciprocatable mechanism between said crank-wheel and said presser, and suitable mechanism for rotating said crank-wheel.

In testimony whereof we atfix our signatures, in presence of two witnesses, this 4th day of November, in the year 1891.

ALBERT SURERUS. WILLIAM P. GREENl-IILL.

Witnesses:

D. FRANCES SEELEY, CYRUS KEHR.

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