US1718031A - Saw handle - Google Patents

Description

G. N. CLEMSON SAW HANDLE June 18,1929.

. Filed April 28, 1928 V, A RNEYS Patented June 18, 1929.

v UNITED STATES 1,718,031 PATENT OFFICE.

GEORGE NATHAN CLEMSON, 0F MIDDLETOWN, NEW YORK, ASSIGNOR T0 CLEMSON BROS, INC., OF MIDDLETOWN, NEW YORK, A CORPORATION OF NEW YORK.

SAW HANDLE.

Application filed April 28,

My invention relates to a saw handle, especially a hand-saw, and my object is to provide a construction which will hold the saw blade from movement in the handle more securely than has been done heretofore.

I am aware that my invention may be embodied in various forms.

In the drawings, I have shown an illustrative example in which Figure l is an elevation of one side;

Figure 2 is an elevation of the other side;

Figure 3 is an edge view; I

Figure 4: is an elevation showing the blade in place, but the clamping block removed;

Figure 5 is an enlarged section on line 5-5 of Figure 1, the'main portions of the studs 5 and 6-being shown in elevation;

Figure 6 is a plan view of a portion of the back plate, and two forms of blade-holding projections; and

Figures 7 and 8 are modifications.

A wooden hand-saw handle heretofore has been formed of two parts between which the blade is received, such as a mere slot in the handle or a seat such as indicated by 1 in Figures 3 and 4 for the blade 2 and a removable block 3 between which the blade is clamped. The means for drawing the parts together onto the blade has been a plurality of exteriorlythreadedbrass bolts, carried by the seat portion, which extend through somewhat larger holes in the blade and into the block or opposite portion of the handle, and are held by nuts on the block which screw onto the bolts. The clamping pressure of the block, and the fit of the blade in the seat (as indicated by the curved line 4: in Figure 4:) has been relied on to prevent working of the blade in its seat; but these expedients have failed fully to accomplish that object. When the nuts loosen somewhat in use, the clamping pressure exerted by the block is lessened or lost, and then the blade is free to more in its seat, around one of the bolts as a pivot for example, with the result that the tempered blade comes in contact with the soft threads of the brass bolts and ruins them. The edge of the blade also chews into the wood seat and no longer fits. Even if the owner then tightens the nuts, the blade is held from movement only by the friction between the flat surfaces of the seat and block. This necessitates such a tightening of the nuts that the soft threads length of time.

1928. Serial No. 273,481.

1y fit corresponding holes in the blade and so prevent it from pivoting around any one projection or moving lengthwise even if the clamping block becomes somewhat loose. These projections may be arranged in a variety of ways, but in the preferred embodiment shown in Figures'l to G'of the drawing I have shown four (5, 6,- 7, 8) formed of brass and integral with a brass plate 9, which may be located in a recess 10 in the handle if desired. This plate also provides a convenient place to present the nameor trade-mark of the maker on its outer face.

These projectionsor studs may be of various forms. Instead of providing them with exterior threads, which are likely to be ruined, I prefer to make their exterior surface smooth axially, as illustrated by the cylindrical projections 6 and 7 or the squared and tapered projections 5 and 8.

The latter are smooth axially, and are also circumferentially non-circular where in contact with the blade.

The blade may be located in its seat and the four projections then inserted through their holes in the handle and through the holes in the blade which are shaped to fit.

If the studs are cylindrical, they will hold the blade securely; but if merely tapered, as at 12 in Figure 7, or both tapered and squared as at 13 in Figure 5, and if the holes in the blade are correspondingly shaped, round for the round studs and square for the squared ones,-and made a trifle small, the hard edges of the blade-holes will, when forced into place by the pressure of block 3, cut somewhat into the soft brass and result in an. exceedingly close fit. as indicated in Figures 4, 5 and 7. This tapered construction also serves to take care of any slight inaccuracies in dimensions which may occur, due for example to Wear of the tools which form the studs or the blade-holes or both.

In order to draw the clamping block firmly down on the blade, various expedients may be utilized, but I prefer to have the studs or projections formed with female threads, which bolts such as 14, 15, carried by the block 8 may engage. I have shown this arrangement in the drawings as the preferred form.

Of course, it unnecessary to carry the studs on the plate 9. They may be independent, if desired, as indicated in Figures 7 and 8. The former shows a stud 1t; having a frustrum-of-a-cone taper at 12. The one in Figure 8 is cylindrical throughout.

The above construction is very efficient in action and yet not expensive to carry out as a manufacturing proposition.

I am aware that my invention may be embodied in constructions other than the preferred one shown in the drawings. I therefore do not in the claims limit myself to the specific forms above described as illustrative examples.

What I claim is:

1. In combination, a saw blade, a handle formed of two parts adapted to receive between them a saw blade, one of said parts being provided with a plurality of soft metal projections having, axially-smooth, but tapered, exterior surfaces closely fitting corresponding holes in the saw blade, and screw-threaded means serving to draw the two parts of the handle together in bladeclamping relation.

2. In combination, a saw blade, a handle formed of two parts adapted to receive between them a saw blade, one of said parts having a plurality of soft metal projections having axially-smooth, cireumferentially noneircular, and tapered exterior surfaces closely fitting corresponding holes in the saw blade, and screw-threaded means serving to draw the two parts of the handle together in blade-clamping relation.

3. In combination, a saw blade, a handle formed of two parts adapted to receive between them a saw blade, one of said parts having a plurality of softmetal projections having axially-smooth but tapered exterior surfaces closely fitting corresponding holes in the saw blade, said projections having female threads engaged by bolts on the other part and serving to draw the two parts of the handle together in blade-clamping relation,

1-. In combination, a saw blade, a handle having a cut-away seat and a removable blade-retaining block, one ofsaid parts having a plate carrying a plurality of soft metal projections having axially-smooth exterior surfaces closely fitting corresponding holes in the saw blade, said projections having female threads engaged by bolts on the other part and serving to draw the seat and block together in blade-clamping relation.

Signed at l diddletown, New York, this 18th day of April, 1928.

GEORGE NATHAN CLEMSON.

Images