US1959475A

US1959475A - Band resaw

Info

Publication number: US1959475A
Application number: US653306A
Authority: US
Inventors: Edward W Hutchings
Original assignee: Individual
Current assignee: Individual
Priority date: 1933-01-24
Filing date: 1933-01-24
Publication date: 1934-05-22
Anticipated expiration: 1951-05-22

Description

May 22, 1934. E. w. HUTCHINGS BAND RESAW Filed Jan. 24, 1933 2 Sheets-Sheet l .17 1L fiul cizz'zajdf sum May 22, 1934. E. w. HUTCHINGS BAND RESAW Filed Jan. 24, 1933 2 Sheets-Sheet 2 13'- JM a aicfign s.

Patented May 22, 1934 UNITED STATES, PATENT OFFICE.

BAND RESAW Edward W. Hutchings, Perry, Fla. 4 Application. January 24, 1933,. Serial No. 653,306

4' Claims.

This invention relates to band resaws, and more particularly toattachments for the. same; and has for an; object. to provide novel guides for directing boards; abutting. each other, ac-

curately to and past the saw: in a continuous stream. to. simultaneously produce two machine rived shingles of' the type described in. my pending application filed September- 21, 1932, Serial Number: 634,228..

10 A further object is to providenovel' guide. plates that may be adjusted toward. or from the feed rolls: to accommodate various widths of shingles to be. sawed'.. w

A further: object is to provide novel. brackets which perform the. dual function of securing the the guide plates to the vertical stationary posts located between the feed rolls, and disposing. the workingzfaces. of-the guide plates in alinement with the work engaging surfaces of the feed rolls; Y

A further object is to produce novel guide ribs on the guide plates and also on said posts for accurately directing the. boards through the. saw with minimum friction.

A- further object isto' provide attachments of the class described which: will be strong and durable, will not easily get out of order, and which will be inexpensive to manufacture.

With the above and: other objects in view the invention consists in certain novel details of construction and combinations of parts illustrated in the accompanying drawings: and hereinafter fully described and claimed;

In the accompanying drawings forming'part of this specification,

Figure 1 is a front elevation of a conventional vertical resaw equipped with my improved guides,

Figure 2 is a longitudinal section of the vertical resaw taken on the line 2-2' of Figure 1, showing the guides in side elevation,

Figure 3 is a horizontal section through the vertical resaw taken on the line 3-3 of Figure 2', showing the guides partly inplan,

Figure 4 is a detail perspective view showing one of the guide plates, the attaching brackets and the ribs on. both the guide plate and the post, and

Figure 5 is a perspective view of a board sawed toproduce two shingles.

Referring now to the drawings in which like characters of reference designate similar parts in the various views, a conventional vertical resaw is shown by way of example, although a horizontal resaw may be substituted if desired.

The resaw comprises a bed or frame on which a table 11 is supported by means of a pivot 12;. whiclris mounted in bearings'13' on the underneath face of the table and in a bearing. 14 integral. with the frame, as shownbest in Figure 2; The. table is tilted on the pivot by ed means of a feedscrew 15 and a, hand wheel 16, aSJShOWIr. best invFigure 1. Feed rolls; I'lare mounted on the tableand whenrthe table is tilted the feed. rolls are canted as aunit to advance. the material: atv anoblique angle to the vertical plane of the saw. 7

The feed rolls are power driven to rotate in the direction of the arrow heads shown in Figure. 3 by means-of gear trains 18, common to each: pair of feed rolls onthe same side of the 74p longitudinal center line of the resaw. Each pair of feed rolls is mounted on a slide 19 which is moved: transversely of the table 11 by means of a hand wheel 20 and feedscrew21, as shown in. Figure 3. The axles 22 of each pair of feed 75, rolls are journalled. at the top in a block 23 which is supported by a rigid post 24 which is fixed upon the slide and' risesbetween. the feed rolls, as best shown in Figures 2 and 3.. r

The band saw 25 is. disposed beyond the feed rolls, as shown best inwFigures. 1 and. 3,. and the. working. reach of the saw extends through the frame. in a vertical. plane, as best. shown. in Figure 1.

The features, above described, are common. to all resaws. -Whether vertical or horizontal all have. feed rolls mountedron a tiltable support, and movable laterally towardjand away from each other. The tilting feature positions the rolls, to feed material at an. angle to the plane of the saw while the transversely adjustable feature permits of. the rolls being moved closer together orfurther. apartto receive various thicknesses of material.

For resawing boards 28 on the vertical resaw just described by way of example, to produce a pair of tapered rived shingles from each board, in accordance with the process described in my copending application, heretofore mentioned, it isdesirable that'the board's be caused to travel in a continuous uninterrupted stream to and past the saw'25'. It is essential that, while traveling in a continuous uninterrupted stream and while passing the saw, the boards be supported accurately andfirmly in order to prevent-jumping up of the boards-or other displacement such as would cause damage or would produce other than a smooth even out.

To attain the above end, I dispose above the frame, and laterally of the saw 25, a pair of upright plates 26, one of which is shown in Figure 4. These plates are formed preferably of sheet metal of sufiicient rigidity to resist vibration. The plates are of sufiicient width and height to receive the largest sizes of boards from which shingles are to be made.

The inner face of each plate is provided with a plurality of transversely disposed ribs 27 which are preferably alsofformed of metal and are spaced substantially equidistant apart from near the top edge to near the bottom edge of the plate. Preferably the ends of each rib project beyond the front and rear edges of the plate. These ribs may be secured by rivets, spot welding, or other method of fastening, and preferably are substantially square in cross section. The ribs engage the finished side face of the board 28 while it is passing the saw and offer minimum obstruction by friction to the passage of the boards past the saw under impulse of the feed rolls.

Each plate is equipped with a pair of superposed Z-bars 29, best shown in Figure 4, which are of sufficient length to pass around the foremost feed roll and be terminally secured by lag screws 30, or otherwise, to the outer vertical edge of the post 24,- as best shown in Figure 3. Each Z-bar preferably is provided with a pair of slots 31 which are disposed in alinement and receive bolts 32 carried by the plate. Wing nuts 33 are threaded on to the bolts and advanced up tight against the bar to hold the plate 26 in each adjusted position. By loosening the wing nuts the plate may be moved on the bars toward or away from the feed rolls to accommodate various widths of boards corresponding to the width of shingle to be produced.

It will be particularly pointed out that the intermediate portion 29 of each Z-bar, between the offset end portions of the bar, is of sunicient length'to dispose the working faces of the ribs 27 in the plane of the work-engaging surfaces of the pair of feed rolls 1'? on the same side of the longitudinal center line of the resaw as the Z-bar. The purpose of this is to maintain the ribs in alinement with the points of contact between the boards and the feed rolls and thus promote the unobstructed easy travel of the boards past the saw.

In further carrying out the invention, as will be seen by referring to Figure 4, I dispose a plurality of transversely disposed parallel guide ribs 34 on the inner edge of the post 24 and preferably these ribs are disposed out of alinement with the ribs 27 on the corresponding guide plate 26 and in alinement with the spaces between the last named ribs. Screws 35 or other suitable connectors may be employed to secure the ribs to the inner edge of the post 24. The ribs 34 are of suchlength that the ends of the ribs project beyond the post so that the ribs bridge the space between the feed rolls 1'7, as shown in Figure 3. The tips 36 of the ribs are beveled to conform to the contour of the feed rolls. The ribs 34 are preferably square in cross section and are of sufficient thickness to permit of their working faces touching or extending in the plane of the inner faces of the ribs 27 carried by the corresponding plate 26, and also in the plane of the work-engaging surfaces of the feed rolls 1'7, as shown best in Figure 3.

It is desirable in practice that a pair of guide plates 37 be disposed on the table 11 to guide the boards to the feed rolls and these guide plates may simply be formed of wood and secured by screws 38, or otherwise, to the table.

In operation, boards 28 having their grain entirely longitudinally of the board, and dressed on both sides, are cut to lengths of 14" to 30" and from 4" to 12 wide, according to the length of shingle to be manufactured. These boards are pushed along the table in upright position, abutting each other at their long edges, between the guide plates 37, and are directed by the plates to the feed rolls 17, Which, as above stated, are power driven and serve to feed the boards in a continuous uninterrupted stream forward past the saw. The table 11, having been previously tilted and set to the desired angle with respect to the vertical plane of the saw, an oblique cut 39 will be produced, as shown best in Figure 5, and

two

shingles

40 and 41 of substantially identical taper will be simultaneously sawed from a single board. These shingles will exhibit longitudinal saw markson the sawed face parallel with'the grain to form drip channels, as described in the above mentioned pending application.

The guide ribs 34 on both posts 24 and the guide ribs 27 on both plates 26 engage the dressed side faces of the boards'while the boards are supported at the bottom edge by the frame during passage to and by the saw, as shown in Figures 2 and 3. The boards are thus supported firmly and steady by the ribs and the frame so thatan accurate clean cut will be assured. The ribs offer sufiicient friction tothe passage of the boards to prevent the same jumping up or wobbling but at the same time do not exert sufficient friction to retard travel of the boards under impulse of the feed rolls. r

While I have described the invention as includ ing bars 29 secured to rigid posts 24 carried by the table, it is conceivable that wherehousings are provided on the table for the feed rolls that the plates 26 may be secured to such housings in any suitable manner and it is intended to include such modificationas are within the spirit of the invention, it merely being essential to the practice of the invention that the plates 26 be disposedat op posite sides of the saw and so mounted on the frame as to present their working faces in alinement with the work-engaging surfaces of the feed rolls andto be also so mounted as to be capable of being canted at an oblique angle with respect to the plane of the saw.

From the above description it is thought that the construction and operation of my invention will be fully understood without further explanation.

What is claimed is: g

1. In a resaw, a band saw, a pivoted table, feed rolls on the table, posts fixed upon the table, guide plates disposed at opposite sides of the saw beyond the table, and brackets secured to the posts and passing around the feed rollers and supporting the guide plates at their free ends in alinement with the work-engaging surfaces of the feed rolls.

2. In a resaw, a band saw, a pivoted table, feed rolls on the table, posts fixed upon the table between the feed rolls, guide plates disposed at opposite sides of the saw in alinement with the workengaging surfaces of the rolls, brackets secured to the posts, and means adjustably securing the guide plates to the free ends of the brackets for movement toward and from the feed rolls.

3. In a resaw, a band saw, a pivoted table, feed rolls on'the table, posts fixed upon the table, transverse guide ribs on the inner faces of the ends to the posts and projecting forwardly beyond the feed rolls, and guide plates carried by the free ends of the brackets and disposed at opposite sides of the saw, the intermediate portions of the brackets passing across the foremost feed rolls and disposing the guide plates in aline ment with the work-engaging surfaces of the feed rolls.

EDWARD W. HUTCHINGS. [L.S.