US131225A

US131225A - Improvement in machines for sawing veneers

Info

Publication number: US131225A
Authority: US
Publication date: 1872-09-10
Anticipated expiration: 1889-09-10

Description

F. H. PLUMMER.

lmpr0vem ent in Machines-for Sawing Veneers.

Patented Sep. 10, 1872.

M. PHWU'LITHOGIMF/IIC 027-. K (USEORNEL PROCESSJ A ()FFIG FRANK H. PLUMMER, OF PLYMOUTH, NEWILAMPSHIRE.

IMPROVEMENT IN MACHINES FOR SAWING VENEERS.

Specification forming part of Letters Patent No. 131,225, dated September 10, 1872.

Specification describing certain Improvements in Machines for Sawing Cylindrical Sheets from Logs, &c., invented by FRANK H. PLUMMER, of Plymouth, in the county of Grafton and State of New Hampshire.

Nature and Objects of the Invention.

My invention consists in certain novel coinbinations and arrangements of parts which have for their object to greatly facilitate the sawing of continuous sheets of wood from a log, to be used in the manufacture of boxes, carriage-bodies, 850., as will be fully set forth hereafter.

Description of the Drawing.

Figure l is a top view of my improved machine. Fig. 2 is an elevation taken from the left-hand side of Fig. 1. Fig. 3 is a vertical General Description.

The machine represented in the accompanyin g drawing operates to cut or saw a continuous sheet of wood from a log by the action of an endless-band saw, the log being continually fed up to the saw and rotated at the same time by proper mechanism. The saw is strained around two horizontal flanged disks, and the log-carriages (one upon each side) are arranged upon the frame in the best position to present the logs to the operation of the saw upon their circumference.

A represents the frame of the machine, supported at suitable height from the floor upon the standards. B B are the log-carriages traveling upon the frame. 0 is the bearin g for the vertical shaft E, upon which the saw-disk D turns. The other disk, D, is driven by a belt from the driving-shaft E, to which motion is given by a belt from its main driving-shaft; this shaft, and also the one to which the disk D is secured, being provided with cone-pulleys F F to regulate the feed of the logs. G

is a bevel-gear secured upon the end of the shaft E. It turns the shaft I through the medium of the bevel-gear H, and gives a continuous rotary motion to it. This motion is transmitted to the logs through the worms J J, feathered to the shaft I and sliding upon it, and the worm-wheels K K on the log-carriages. L L are weights attached to the end of cords N N, secured to the carriages B, one to each side of the carriages. These four cords pass over the grooved pulleys M M and act to draw the carriages forward and keep the logs in contact with the saw. 0 O are adjustable slides that support the centers upon which the logs P P rotate. It R are two pressure-rollers, one in front of each log. They are held in bearings immediately overv the saw, and adjusted by means of the screws Q Q. (See Fig. 5.) They operate to govern the depth of the cut of the saw, and, consequently, the thickness of the sheet produced. The logs are held by the cords and weights always in contact with the rollers, and the relation of the circumference of the log with the plane of movement of the saw-teeth is controlled by the adjustment of the roller more or less back of the saw, the thickness of the sheet being greater as the roller is moved further from the line of the movement of the saw. This is illustrated in the detail view, Fig. 5. U U U U are grooved rollers held in bearings on the frame beneath the saw, which act as supports for the saw and as guides to keep it in a true plane of movement. The means for straining the saw and keeping it at the propertension consists of the bolt and nut V, the head of the bolt being secured to the journal-box of the shaft of the disk D, and the end projecting through the bearing 0, and fitted with a nut, as shown in Fig. 2.

The device shown in detail in Fig. 6 acts to guide the saw and keep it straight in the out. It is strained between the frames, and lies between the log and the board being cut, immediately under the saw, and is formed of a rod,

, X, with a series of pins projecting from it, with grooves in their ends to guide the lower edge of the saw. These parts act to feed and pre sent the log automatically to the saw, so that the operation of the saw upon the circumference of the log is continuous until it is cut up into a sheet or sheets of the required thickness.

and its vibrating support with the temperscrew Q and spring T, when arranged with relation t0 the band-saw S and 10g R, in the manner substantially as described.

FRANK H. PLUMMER.

Witnesses:

E. J. DURANT,

G. E. DURAN'I.