US272445A

US272445A - jones

Info

Publication number: US272445A
Authority: US
Publication date: 1883-02-20
Anticipated expiration: 1900-02-20

Description

2 Sheets-Sheet 1 Paterlted Peb.20,1883,

(No Model.)

R. B. JONES & G. F. WETHERELL.

RESAWING MACHINE.

Wines Mes.-

N. PETERS, Pmmm m. wmmmm'mc.

PATENT OFFICE.

RICHARD B. JONES AND GEORGE F. WETHERELL, OF CHICAGO, ILLINOIS, ASSIGNORS OF ONE-THIRD TO RANSOM IHOHARDS, OF SAME PLACE.

RESAWlNG-MACHINE.

SPECIFICATION formingpart of Letters Patent 0. 272,445, dated February 20, 1883.

' Application filed November 7, 1882. (No model.)

To all whom it may concern Be-it known that-We, RICHARD B. JONES and GEORGE F. WETHERELL, citizens of the United States, residing at Chicago, in the county of (look and State of Illinois, have jointly invented certain new and useful Improvements in Resawing-Machines; and we do hereby declare the following to be a full, clear, and exact description, sufficient to enable others skilled in the art to which said invention appertains to practice the same, reference being had to the accompanying drawings, in which Figure 1 represents a side elevation of a resawing-machine with our improvements applied thereto. Fig. 2 is a vertical sectional view through the frame-work back of the guiderolls. Fig. 3 is an enlarged detailed view, in side elevation, of the portion of the machine embodying our invention. Fig. 4 is a View partly in section and partly in side'elevation of the mechanism for sustaining the upper cutter-head; and Fig. 5 is a sectional view of the upper portion of the slotted standard which bears the upper cutter-shaft.

Our invention relates to improvements in machines for resawin g lumber, and especially to that class of machines in which the material to be divided. is delivered to the saw through vertically-journaled teed-rollers.

The object of our presentinvention is to so locate and sustain the'cutter-heads by means of which the rough edges of the boards are trimmed that a more uniform and certain planing of the upper edge may be efiected and a greater depth of cut may be made by the upper cutter-head when desired.

In the accompanying drawings the invention is shown applied to a machine of the character set forth in Patent No. 266,997, granted to Richard B. Jones on the 7th day of Novemher, 1882, in which the vertical feed-rolls A are sustained upon a tilting tablejournaled to the main frame B in front of the saw (3, and driven by suitable gear wheels from the source of power. Beyond the saw 0 is placed the usual sWoid,D, and the guide-clampsE and pressureroll F, sustained by a suitable standard on the frame. To the bed of the machine, below the pressure-roll F, is bolted the journal-standard G, by which is carried the shaft of the cutterhead G, by which the lower edge of the boards are'trimmed as they pass from the saw.

It has heretofore been the practice to place the cutter-head by which the upper edges of the boards were planed or trimmed behind the saw and the sword, and great difficulty has been experienced in planing the upper edges by a cutter-head so located, for the reason that the boards, especially when they have left the bite of the feed-rolls, have a tendency to wabble, and thus render the planing uneven. More particularly has this uncertainty and unevenness of action been experienced where the boards have been thin, and where it has been necessary to cuta considerable depth of material from their upper edges. This difficulty we have overcome by sustaining the upper cutter-bead at such position on the main frame that it shall act upon the material before it is divided and while it is still in the bite of the rolls. Another important advantage lies in the greater range of adjustment which may be safely allowed the cutter in the new relation. The rolls and the saw both operate to hold that part of the timber against which the cutter is acting firmly upon the bed-plate. In the old positions of the cutter the tendency of the saw-teeth, in revolving. was to lift the timber away from the bed. Hence to prevent it from riding, or otherwise endangering the machine or operator, the depth of edge which could be trimmed off by the cutter was necessarily very circumscribed. By this change in position the cutter may be given a much greater range of adj ustme'nt with entire impunity, increasing the capacity of the machine to work stuff of varying width, and requiring little care on part of the operator to secure what is of approximately the same width at the outset.

To the main frame B, in substantially the position shown, are bolted the standards H, havingthe brace-arms projecting rearwardly therefrom to a point beyond the arbor of the saw. To the top of these standards is secured the cross-head H, having a central-threaded socket toreceive the adjusting-screw I. This screw I is connected, as shown in Fig. 4, to the adjustable cross-arm K, which is clamped in desired position upon the standards H by means of the set-screws h, passing through the slots h, of any desired length, in the standards. To the beam K, are aflixedjournal-bearings K, of suitable construction to sustain the driving-shaft L of the upper cutter-head, L.

By the above-described mechanism the cutter can be readily adjusted so as to vary as necessary the amount cut from the upper edge of the lumber.

To the standard H, near its top, is bolted the arm m, to which is pivotally hung; the chipbreaker M, pressed constantly downward by the spring m on the rod m which is hinged to the chip-breaker and passes through the standard in", secured to the cross-head H.

By the above-described improvements we are enabled to plane the upper edge of the lumber uniformly to its very end and to vary at pleasure the action of the upper cutter-head.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

RICHARD B. JONES.

GEO. F. VVETHERELL.

Witnesses:

GEORGE E. HIBBARD, CHAS. W. BELDEN.