USRE3101E - Improvement in circular-saw mills - Google Patents

Description

UNITED STATES PATENT OFFICE.

GEORGE. PLACE AND CHARLES PLACE, OF NEW YORK, N. Y., ASSIGNEES 0F CLARK I. HAYES AND MARTIN NEWMAN.

IMPROVEMENT IN CIRCULAR-SAW MILLS.

Specification forming part of Letters Patent No. 36,150, dated August 12, 1862,' Reissue No. 3,101', datedl August 25, 1868.

vState of New York, did inventcertain new and useful' Improvements in Machine for Edging and Slitting Boards; and we, GEORGE PLACE and CHARLES PLACE, of the city, county, and

State of New York, assignees ot' said CLARK I. HAYES and MARTIN NEWMAN, do hereby declare that the following is a full, clear, and

exact description thereof, which will enable others skilled in the art to Inake and use the same, reference being had to the accompanying drawings, forming a part of this specification,'in which- Figure l is a view looking down upon the top ot' the machine, showing the arrangement of pressure-rollers. Fig. 2 is a view of the side of the machine, showing the arrangement of pressure-rollers. Fig. 3 shows a plan view of the adjustable yielding box that supports the upper set of pressure-rollers. Fig. 4 is a ver.- tical section of the saw-arbor and sliding hub and collars which hold one of the saws a a.

Similar letters of reference indicate correspending parts.

The nature of our invention consists of two circular saws on one mandrel or arbor, so constructed as to be adjustable, for the purpose of edging boards of all widths, taking olf both edges at the same time, and making 'both edges parallel to each other; also, for the purpose of slitting boards of all widths, that their edges maybe parallel. Furthermore, there is anl arrangement of adjustable pressure-rollers with yielding boxes,'whereby the rollers can be adjusted to suit any thickness of lumber, and the yieldingy box will allow the rollers to accommodate any inequalities that might be in the thickness of the lumber, insuring a con- -stant uniform pressure of the feed-rollers, and

is more fully explained, as follows:

Q is the saw mandrel or arbor, mounted with two circular saws, aa, as seen in Fig. 1. The saw of hub H, Fig. 1, is secured in the usual manner'by the screw-nut K K and the collars. The hub H, withits saw mounted as seen .inthe figure, is made to slide on` the mandrel by Y meansof the arm N and the screw O, acting upon the nuts or boxes L L.. The end of arm Nlits in a groove in the hubH, as seen at 1t. The hub H is provided with a tongue or projection, which lits a corresponding groove in the saw-mandrel, which admits of the saw and hub sliding from one end of the mandreljto the other perfectly free, and yet thesaw is made to revolve with the mandrel. This tongue and groove can be seen best in the vertical section of Fig. 4. Motion is givento'the same inandrel through pulley b. l I:

Motion is given to the screw O by turning crank-shaft S, which communicates its motion through the bevel-gears P.

M'I M are rests or supports, for the lumber to rest upon when the saws are cutting. Ml is attached to arm w and nuts L L, so as to move with the saw as it is made to slide on the mandrel Q.

F F is a frame, on which the several parts constituting the machine are mounted. W W W Win Fig. 2 show anr end view of the pressure-rollers. c is a drivin g-pulley, and motion is transmitted to the lower set of feed-rollers WV W through the intermediate gears d d and the pinion attached to the driving-pulley c, as

shown by the dotted lines on pulley c. X X are to represent the adjustable boxes which mount the upper set of rollers NV, its lower part being slotted. The box can be elevated or depressed at pleasure, and secured at any point by means ot' set-screws T T in Fig. 2. g g are caps on boxes X X, which are removable.

Fig. 3 represents a plan of the box X. B represents a rubber spring, or its equivalent, with its upper. end resting against the cap g and its lower end pressing down upon the box V, as shown by the shading of small dots. f The case containing the box V and the rubber B is slotted, so as to allow the journals of the feed-rollers to move freely with the rubber and box V. Z representsthe groove i'n the sawqnandrel Q. Y v

The operation of this machine is as follows: p

Motion is-given to the saw-mandrel by applyin'ga belt driven by any suitable power to pulley b. The screw O is turned by turning the crank-shafts either'to the right or left until the saws are broghuo the desired distence apart. A board, of the thickness that is intended to operate upon, is plaoed uponI the front and lower roller; then the upper roller is brought downv rmly upon the board, and the upperroller held firmly in this positionv by turning up the set-screws T. The box X represents the rollers, being `much farther apart than X on the right-hand side of Fig. 2.

We do not limit our claim to the use of the screw 0 and bevel-gear P, for a. rack and pinion may be substituted for them.

We do not elai'm the movable and statioary saws upon one mandrel, nor the screw and gear moving them, of themselves; but

sire to secure by Letters Patent,

What we claim as' this invention, and de- 1. In n machino fox-'edging and slitting lun1' ber, where the saw or saws are made adjustable on the mandrel, the combination of said saw or saws with feed-rollers constructed and arrangedwto opmte in'the manner and for the purposespeeiiied.=v

2. The construction of the saw-mandrel and hub which moves upon i as described. l

- G BGE PLAGE. J v CHAS. PLACE. -W1tnesses: i

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