US109146A - Improvement in sawing-machines - Google Patents

Description

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Letters Patent No. 109,1i6, dated November 8, 1870.

IMPROVEMENT IN SAWlNG-MACHINES.

Th Schedulereferred to in these Letters Patent and making part of the same. j

description thereof, reference being had to the accompanying drawings and' 'to the letters of reference marked thereon which form a part of this specifica- Brion.

The nature of my invention consists in the construction and arrangement of a sawing-machine, as will be hereinafter fully set forth.

In order to enable others skilled in the art to which my invention appertains to make and use the same, I will now proce-ed to describe its construction and operation, referring to the annexed drawings, in which-' Figure l is a fro'nt elevation g Figure 2 is a plan view; and

,Figure 3 are enlarged views of the device, by which the saw is tightened. v

Figure 4t shows the upper saw-connection.

A represents the frame-work, which supports the saw-table B.

An additional frame-work, C, is attached to the main frame A, and extends from above .one end of the table to the point where the saw is to pass.

In lthe lower portion ofthe frame A is hung the treadle,l D, which, bythe usual means of a pitman and crank, operates the shaft E and driving-wheel G on the same. v

The wheel G is, by a belt, connected with a pulley on the shaft H, which has its bearings in suitable boxes in the frame A, and runs under t-he table above and parallel with the main shaft E.

0u the outer end of the shaft H is a crank or crank-wheel, connected by a pit-man, a, with an arm, D, extending .from a shaft, l, which is placed in suitable journal -boxes on the top of the upper frame C.

This shaft, by the motion .of the machine, obtains a rocking motion.

From the inner end of the rocking shaft l extends another arm,"d, in the same direction, and parallel with the arm b. l

The outer end of thefarn'i d is forked, and in the saule is pivoted a small block, yi, through which a screw-rod, e, passes.

Thelower end of this rod is attached to the upper saw-connection f, while the upper end, above the block i, is provided with a crank or thumb-uut, h'-, by means of which the saw I is tightened or loosened at will, as may be necessary, the same as for an ordinaryjwoodsaw.

The lower end of the saw J 'is attached to a head or coiuiection, f', under the table, and this lower saw- -connection is, by a pitman, 7c, connected with a crank ou the inner cud of the shaft H.

The various shafts, cranks, and pitmen are so arranged that the motion of the pitman It and arm fl widA correspond; that is, both will move up and both downxtogethen and operate the saw from both ends thereof.

The saw-connections f f' more in guides y g and g y', respectively, arranged on the frames C and A, as shown.

These saw-connections consist of a block which ,has a pin, lm, on its outer side.

'This pin is passed through a hole in the end of the saw, aml then a face-plate att-ached to the ontside of the block covering the end of the saw, by means of a set-screw, n., the pin m passing through a hole in the face-plate.

p is a guide for the saw, attached to the end of` the frame C. Thus constructed the machine can he used for sawing scroll-work, or other similar work.

For sawing eordiwood I place upon the table a slotted frame, K, provided at its ends with downward-projecting flanges s s, the outer one of which fits over the end 'ot' the table, while the inner one is placed in a groove or slot made across-the table,

and the saw moving in the slot on the frame.

On this frame K are small posts or standards t t, against which the wood is placed.

'lo the rear side of the frame K is attached a cord, 1', so arranged over a pulley, w, on the rear edge of the table, and with a weight, L, as to push the frame forward. y

The operator, standing in front an'l working the treadle, pushes-the frame K with the wood toward the rear until the saw has passed through the wood, when the weight L moves it forward again.

Having thus fully described my invention, i

XVhat I claim as new, and desire to secure by Letters Patent, is

1. The rocking-shaft I, with its arm d, block f, screw-rod 'e, and nut h, all constructed and arranged to operate, substantially as anl for the purposes herein set forth.

2. The arrangement of the treadle D, shaft E, wheel G, shaft H, pitrnen a lf, and shaft I with its arms b d., all substantially as shown and described.

.In testimony that I claim the foregoing as my own, I affix my signature in presence of two witnesses.

' D. S. SHANABROOK.

Witnesses T. H. ALEXANDER, C. ALEXANDER.

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