US1703429A - Combination saw, try-square, and miter square - Google Patents

Description

A. A. OTTOSON Feb. 26, 1929,. 1,703,429

cdualmnou SAW, TRYSQUARE, AND MITER SQUARE Filed Oct. 51, 1927 INVENTOR jLA, Oil-0 son BY @wwgxmsr;

ATTORN EY l mented Feb. 26, 1929.

AUGUST A. OTTOSON, OF SACRAMENTO, GALIEORN'IA,

COMBINATION SAW, TRY-SQUABE-AND MITER SQUARE.

.Application filed October 31, 1-927. Serial No. 228,905..

This invention relates to carpe ters tools, my principal object being to provide as a single unit a handsaw having a try-square and a miter square attachment permanently mounted thereon.

Such a tool will conserve considerable time and labor in avoiding the need of having the saw and square as separate tools. Such tools must of course, be carried separately and as a result the workman frequently forgets to move the square to different points in the length of a piece of wood upon which he may be working. In such cases, therefore, the workman loses considerable time in the aggregate in walking back and forth to retrieve the square. With my improved tool the square is always at hand wherever the saw is and the saw does not need to be laid down when the square is to be used, and vice versa. As a consequence operations as a whole are considerably facilitated and expedited. At the same time the square attachment is not in the way of proper manipulation of the saw and need never be removed.

A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly effective for the purpose for which it is designed.

These objects I accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims.

In the drawings similar characters of reference indicate corresponding parts in the several views.

Fig. 1 is a fragmentary side elevation of a saw showing my square attachment mounted thereon, and

Fig. 2 is an enlarged cross-section of the saw and attachment taken on the line 2-2 of Fig. 1.

Referring to the numerals of reference on the drawings, 1 denotes the blade of a handsaw of ordinary character. whose back edge 2 opposite the teeth 3 is straight from end to end so as to serve as a straight edge. A handle 4 of suitable character is connected to the back end of the saw as usual.

My square attachment which is mounted on such saw comprises a pair of metal bars 5 applied to the opposite sides of the blade in transverse alinement with each other and securely connected to the blade by rivets 6. The longitudinal edges of the bars which face the front end or point of the saw are disposed at an angle of exactly 90 degrees to the edge 2. The bars are set slightly ahead of the handle in spaced relation thereto as shown in Fig. 1, so that the handle will never contact with the bars even if looseness of the handle develops, as is frequently the case.

The bars terminate short of the straight edge 2 of the blade and at such end have permanent hinge or pivot connection as at 7 with an extension bar 8, whose portion adjacent the hinge is slotted as at 9 to straddle the blade; the bar extending beyond the saw edge and slot a certain distance. WVhen the bars 5 and 8 are in straight relation to each other the forward longitudinal edges are both in common longitudinal alinement. The bar 8 is capable of being turned only forward on its hinge from such longitudinal alined position to a 45 angle with the blade edge 2 as shown in dotted linesin Fig. 1. The inner end of the slot 9 is cut diagonally of the bar so that it will then rest snugly against the blade edge; and the adjacent end edges of the bars on both sides of the blade are cut away as at 10 so as to then also snugly engage each other.

To hold the bar 8 in either position relative to the blade and the bars 5, a holding screw 11 is mounted in the bar 8 on one side of the blade, the inner end of this screw being arranged to be projected through either one of a pair of holes 12 disposed in the blade apart and of course concentric with the hinge 7.

The bars'when in longitudinal alinement together form a try-square in combination with the edge 2 of the blade; and when the upper bar 8 is angled relative to the blade it serves as a miter square in connection with said blade. Since the upper bar projects outwardly from both sides of the blade the tool is usable for squaring purposes when turned to face in one direction or the other, and the weight of the saw as a whole remains properly centered relative to the handle.

From the foregoing description it will be readily seen that I have produced such a device as substantially fulfils the objects of the invention as set forth herein.

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described my invention what I claim as new and useful and desire to eecure by Letters Patent is:

1. A square attachment for a saw blade 5 having a straight back edge, comprising a bar, means for pivoting the bar at one end onto the blade intermediate the back an toothed edges thereof, another bar inin'iovably secured 011 the blade in connection with 10 the pivoted bar and projeetin away from the pivoted end oi the same toward the toothed edge of the blade, and shoulders formed on the adjacent ends of the bars arranged to limit the movement of the pivoted bar to a predetermined are.

2. A structure as in claim 1, with means for holding the pivoted blade at either end of its limit of movement.

In testimony whereof I afiix my signature.

AUGUST A. OTTOSON.

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