US108296A - Improvement in miter-machines - Google Patents

Description

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Letters Patent No. 108,296, dated October i1, 1870.

IMPROVEMENT'IN MITER-NIACHINES.

The Schedule referred to in 'these Letters Patent and making part of the same To all whom 'it may conoci-nf:

Beit known that I, LnANnEn W. Rosacea, of Marshalltownyin the county of Marshall and in the State of' Iowa, have invented certain new and useful Improvements in Guide for Hand-Saws and do hereby declare that the following is a `full, clear, and exact description thereof', reference being had to the accompanying di'awing and to the letters of reference marked thereon, making a part of this specification.

The nature of my invention consists in the construction and arrangement of a hand-saw guide, intended to guide the 'saw while cutting a board or plank at any one or two angles at the same time, the saw-guide being so arranged that it can be turned either to the right or left, raised up and down, and placed at any angle with the bed desired. v

In order to enable others skilled in the art to which my invention appertains to 'make and use the same, I will now proceed to describe its construction and operation, referring to lthe annexed drawing, in whichi Figure 1 is a side view, and

Figure 2 is an end view of my machine.

Figure 3 is a plan view of a cylinder-frame used in the machine, and

Figure 4 is a side view ot' a degree-scale, also used with my machine.l

A represents the bed-frame of my machine, at one end ot' which is hinged a cylinder-frame, B. This cylinder is, at its lower end, provided with a tenon, a, anda circular shoulder or bearing on either side. At the top it is provided with an indicator-plate, d, which is plainly shown in tig. 3.

A. cylinder, G, passes through the -frame B, its lower end being fastened to the tenen a by means of a pivot-screw, and its upper end'extcndiug a suitable distance above the indicator-plate fl. This cylinder may be .rotated 011 its pivot either to the right or left, and held at any point desired by means of a thumb-screw, E, passing through the cylinderframe. v

Through the cylinder C to the bottom thereof runs a rod, D, which is provided with a longitudinal groove, f, whose sides converge toward its center, and receives the frustnm of the thumb-screw g, which passes through the cylinder, and keeps it from turning in the cylinder C, and allows it, to be, raised and lowered at will.

At the upper end of the rod D is an arm, E, provided at its outer end with a cross-head, G, having two bars, 1I H, extending downward parallel with the rod I), said bars being slotted longitudinally, as shown in fig. 1.-

The cylinder C is, immediately above the indicator-plate d, proyided with a needle-point or iiner, 1f.

g Ou the side ot' the cylinder-frame B, at its upper end, is attached a graduated or scale-brace, I, which passes through an inclined projection, h, on a post or standard, J,'and is there secured by a thumbscrewl At the other end of the frame A is another post or standard, M, and under the frame at this end is placed a board7 N, crosswise, as shownin iig. 2.

-The cylinder-frame B and posts J and M are so arranged that a board or plank placed alongside of theframe will touch the side of all three.

K is a degree-scale, the use of which will be presently explained.

rIhe frameA is screwed to a plank, as shown by dotted lines in iig. l, the board N bearing against its edge. Then set the bevel-tool to the required angle, apply the haft or handle against the base of the degree-scale K, with its blade across the face. Loosen the thumb-screw E, turn the cylinder O, with the necdle-pointi, at the corresponding point indicated by the bevel-tool on the degree-scale, then tighten the screw' E again. Proceed in the same manner with the scale-brace I il'1 a diagonal cut is wanted; that is, loosen the thumb-screw in the projection lt, move the brace with the cylinder down to the left to the required point, and then tighten the screw.

Then take the timber; place its edge on the plank to which the frame A is secured, with the edges ot' the timber against the posts J M and the cylinderframe B; then loosen the thumb-screw g, and raise the rod D until the lower ends of the guide-bars H H will be about one-half vor three-fourths 0f an inch above the timber; vthen tighten the screw, insert the back of the saw in the slots in the guide-bars H H, and saw it down.

Having thus fully described my invention,

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

1. lhe cylinder-frame .13, provided with the tcnon a and circular shoulders or bearings b l1, said frame being hinged to the bed or frame A, and braced by/ the scale-brace I, substantially as andy fonthe purposes herein set forth.

2. 'lhe combination of the hingedcylinder-frame B with indicator-plate dfpivoted cylinder G, with needle-point t, longitudinally-grooved rod D, having the slotted guide-bars H' H attached to its upper end, all substantially as and for the purposes herein set forth.

3. The frame or bed A, provided with posts J M and board N, substantially as and for therrpurposes In testimony that I claim the foregoing, I have herein set forth.

4. The combination of the bed A, cylinder-frame 1870.

1S, cylinder O, rod D, guide-bars H H, scale-brace 4 LEANDER, \V. ROSECRANS. 1posts J M, :md board N, all constructed and ar- Witnesses:

ranged to operate substantially in the-mzmnner and WM..H. SUMMEBS,

for the purposes herein set fort-h. T. W. HART.

hereunto set my hand this 8th davy of March,

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