US2005961A - Pull and drag-saw machine - Google Patents

Description

June 25, 1935. T TELESKY 2,005,961

' PULL AND DRAG SAW MACHINE Filed Oct. 25, 1953 Patented June 25, 1935 HULUAND-BBAG-SAW MACHINE 'TfiumniAmsterdamy' N.- Y. --Application October-r25, 1933, SeriaLNo: 695,147?

r Claim. (-Cli 143---61) Unis:- invention. relates to -ithe -actioniof sawingu and cutting; substances andlmaterialsr The ob. jects of the mechanism-andrfeamres:areethatsaw bladesof: diftenentrvlen'gths, widths, and thicknesses may be used, and may be pulled or dragged in both directions. More than one saw-blade may be secured or attached to the same pins or bolts, and more than one saw-cut may be performed at one time.

This machine may be operated by any motive power, by belts, chains, cables, gears and reciprocating rods or bars; in the shop, on the yard, on the field and in the woods; on a bench, movable frame or on any convenient vehicle; it saws and cuts horizontally, vertically or at any angle; the stroke of the saw-blade may be adjusted to any length.

The form of the invention is illustrated in the accompanying drawing, in which Figure 1 is a vertical section of the entire machine; Figures 2, 3, 4, 5, and 6 are operating details; Figure 7 is a plan view of a movable frame; Figure 8 is a vertical section of the movable frame; Figure 9 shows an apron; and Figure 10 shows a cover or hood.

The girder I 'is bolted and secured to the legs or standards 2, 2. The ascending and descending curved lever 3, (a straight lever could be used), is secured by a pin 4, to both sides of the girder I, and is operated up and down by a lever bar 5, and push pull rod 6, which simultaneously raises or lowers the saw-blade 1 to the position as indicated by the dotted lines. The rod 8 is adjustable into a spherical nut in the lever 3. The pins or bolts 8, 8, that connect the saw-blade I to the stroke chain 9, by links 30, 30, may be of sufficient lengths to receive more than one sawblade at a time. The endless chain II) is connected or pinned parallel to the stroke chain 9 by a pin II, (see Fig. 2).

The sprocket I2 secured to a shaft I3, (see Fig. 3) may be rotated in either direction, pulling the endless chain II) over the sprocket I4, reversing the stroke chain 9, over the sprockets I5, I5, and I5, simultaneously reciprocating the saw-blade I, which performs the sawing or cutting through the material or substance that is to be out.

A rod II, threaded on one end, may be adjusted through a link I8, secured by a pin I9, to the eccentric or cam on the hand operated lever 5, the other end being secured to a crank 20 on the cam shaft 2|. A yoke 22 supports an axle 23 upon which is mounted the sprocket IS. The yoke 22 is inserted in holes in plates 24, 24, which have bores or holes in their centers; and coil springs: 25, 25;,t-ravelior; slide back and forthsonthe: round bars or rods 26, 2.6-, simultaneously carrying theyoke 22 and-sprocket lfi. The-bars or. rods26,,25, at-their-endsare fastened or boltedto the standard 2, the other ends together with the plates 21, 21, that receive the cam shaft 2I, being bolted to the end of the girder I.

When the lever bar 5 raises or lowers the lever 3, and the saw-blade 1, to the position as shown by the dotted lines, simultaneously the rod II operates the cam 28, which adjusts and regulates the necessary even tension for the sawblade I. The coil springs 25, 25, and the bend or curve of the lever 3, absorb all the jarring that occurs when the endless chain I0 reverses the stroke chain 9, that performs the stroke for the saw-blade I, and they also sustain the lever 3, and saw-blade I, in upward position.

The arms or guides 29, 29, are employed to guide and keep the saw-blade I perpendicular to the log or other material.

These guides are secured to the links 30, 30, at each end of the saw-blade by bolts or pins 3 I, 3 I, so that the saw-blade may be adjusted to the proper angle. The other free ends of the guides are attached by pins or bolts 32, 32, one to the standard 2, while the other one may be attached or pinned through holes provided on the lever 3, according to the length of the saw-blade used.

The pulley 33 and the spocket I2 are fastened to a shaft I3, which may be operated by an electric motor, or gas-engine or any similar power.

A shaft I3 revolves in the ball-bearings in the plates 34, 34, which are bolted to the girder I by bolts 35, 35, and to the bar 36, by bolts 31. The bolts 38, 38, keep the shaft plates 34, 34 parallel one to another. The bar or shaft 39, with a crank on one end, is connected to the lever bar 49 by a rod or bar 4I.

The idle or belt tightener pulley 42, (see Fig. 4), turns on the axle 43, which is secured to the bars 44. The bars 44 are secured to a shaft or bar 39, fastened by a set screw 45. The lever bar 48 operates on a pin 46, while the bolt 41, with a cam thereon may be so adjusted that it rests on the bar 36, and keeps the lever bar 48 in any position required so that the pulley 42 tightens and loosens the belt. When it is necessary to replace the pulley 33, by a sprocket and endless chain employed instead of belt then the lever bar 40 may be used to operate the clutch. The plate 48, (see Fig. 5), is bolted to the girder I. The axle 49, on which the sprocket I4 is mounted may be adjusted by a bolt 50 in the slot 5I The plate 48 may be reversed and moved back and forth on the girder I, bolted or fastened through the holes provided, thus extending or shortening the length of the endless chain Ill, hence the stroke of the saw-blade I.

By adding or subtracting links to or from the stroke chain 9, various lengths of saws may be employed.

The log holder 52, and its mechanical assembly are bolted and secured to the girder I and base 53, and it is operated by a foot pedal, looking itself mechanically as shown in Figure 6, so that the spikes 54 clear the log or other material when the machine is moved from one cut to another.

Figure 7 is a plan view of the movable frame, the bar 55 being a part of the log holder mechanism, and the wheels 55, 56, being wide enough to run upon planks or skids as well as over the floor. The holes 57 are provided to boltand fasten the engine or motor to the frame; the bolts 58, 58, fasten the base 53 to the frame. Figure 8 is an end elevation of the movable frame, the spikes 54, under the base 53, preventing the entire machine from sliding from the log or other material. The bolt 59 fastens, tightens and holds the girder I to the standards 2, 2, and the bar 36 simultaneously serves as a pin for the lever bar 5. The braces 60, 60, are to keep the girder I, and the standards 2, 2, rigid with the frame bars 6!, 6|, and to an axle 62. The handles 63 may be raised and lowered, bolted and secured to standards 2, 2, by the bolts 64.

Figures 9 and 10 are drawn to a smaller scale; they are the apronvand cover or hood to cover the revolving and-"moving' parts for protection and safety for the operator of this machine.

I claim:

In a drag saw machine, a frame, a member rigidly secured thereto and extending therefrom,

a sprocket mounted at each end of the member, a beam pivoted at its one end near the extended end of the member and supporting a sprocket at its free end, a chain trained over the sprockets and having its ends connected to the ends of a. drag-saw blade, means to pivot the beam to adjust its angular relation to the member, and means to reciprocate the chain.

" THOMAS TELESKY.

Images