US112883A

US112883A - Improvement in saw-mills

Info

Publication number: US112883A
Authority: US
Publication date: 1871-03-21
Anticipated expiration: 1888-03-21

Description

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EMANUEL ANDREWS, or wILLI'A-Msroar, PENNSYLVANIA.

Letters 'Patent No. 112,883, dated March 21, 1871; antedated March 10, 1871.

IMPROVEMENT iN SAW-MILLS.

'The Schedule referred to'inthese Letters Patent and mldng part of the name.

Figure l is a perspective view of a saw-gate with` my improvement attached. v f Figure 2 is a detached -view of the hook by means of which the lower euds'of the' saws are secured.

Figure 3 is a similar view of the stirrup which secures the upper end of the saws.V A

-Like letters refer to like partsin each figure.

The nature of this improvement relates to the construction of reciprocating saw-hangings in saw-mills,

so that the saws may be readily and accurately gauged to Cut any desired thickness of lumber, and consists in the, arrangement of certain slotted gauge-bars, the sloisof which are designed to engage with the pro' jections heretofore mentioned, thereby gauging the saws to cut any desired .thickness of lumber from the log on the carriage, and holding the saws-firmly in place, as more fully hereinafter described.

In theaccompauying drawingv A represents a saw-sash, lwith two saws, B, secured in place at theirl bottom ends lby means oi' the hoolrssO, while .the upperjends are secured by the stirrups D in the manner fully described in a patent grantedto me on the21st day of April, 1868.

The hooks O and stirrups D are provided with projections d fromtheir front faces, for the purpose hereinafter described.v l

E is a gauge-bar, provided-with slots b, which are cnt into the lower edge of saidbar eqnidistant from each other, This gauge-bar is secured to the front of the sash A by means of any proper device, so that the bar may be easily placed or removed, and, when in piace, held securely.

There should bev a series of these gauge-bars, with slots, as described, at such distances apart as will be coincident with the various thicknesses of I lumber required.l f

The gauge-bar shown in the drawing represents the slots at proper distances for inch lumber, and the saws are held to their position, relative to the thickness of lumber required to be cut, by the projections a upon the stirrups Deuter-ing the slots b in said gauge-bar.

F is another gauge-bar, providedwith similarl slotsV d, which engage with the projections a upon the hooks C, thereby holding the bottom ends of the saws in -place and in line vertically with the tops of .the same,

and keeping the saws parallel with each other.

The gauge-bar F is secured to the sash-A by any suitable device, so that said bar may be removed and replaced readily, and at the same time the bar will be immediately in front of the slide upon which the hooks G are placed and secured in s'uch a manner as to hold the hooks C from disconnecting themselves from said slide.

f G are other gauge-bars, secured to the rear side of the sash so as to be easily detached and replaced, and provided with similar slots coincident with the correspending slots in the gauge-bars E and F, and which engage with the saw backs near the upper and lower ends of said saws and assist in keeping the saws rigidly in place. p

Series of all these gauge-hars should be provided,

with slots to secure the various thicknesses of lumber desired to be cut, so that by changing said gauge-bars the saws may be easily -set and rmly held to do the required work. v v

WVhat I claim as my invention,- and desire to secure by Letters Patent, is Y I The gauge-bars E and Gr, arranged substantially as and for the purposes setforth. l EMANUEL ANDREWS.

Witnesses z H.' S. SPRAGUE, JAs. L DAY.