US2173348A

US2173348A - Saw

Info

Publication number: US2173348A
Application number: US162318A
Authority: US
Inventors: Clyde I Welch
Original assignee: Individual
Current assignee: Individual
Priority date: 1937-09-03
Filing date: 1937-09-03
Publication date: 1939-09-19
Anticipated expiration: 1956-09-19

Description

C. I. WELCH Sept. 19, 1939.

SEW

Filed Sept. :5, 19;?

Patented Sept. 19, 1939 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to improvements in saw handles.

The general object of the invention is to provide an improved saw handle having meansthereon whereby the back of the saw may be used as a straightedge for marking various angles on pitches.

Another object of the invention is to provide an improved saw handle having thereon a pivoted angle plate and coacting pitch scales whereby when the angle plate is set to various indicia on the scale the back of the saw may be used to mark off plumb cuts on common rafters, hip and valley rafters, and plumb and check marks on jack and valley rafters.

Other objects and the advantages of this invention will be apparent from the following description taken in connection with the accompanying drawing, wherein:

Fig. l is a fragmentary side elevation of a saw having my improved handle construction thereon;

Fig. 2 is a top plan view of the device shown in Fig. 1;

Fig. 3 is a section taken on line 3-3 Fig. 1; and

Fig. 4 is a section taken on line 44 Fig. 1.

Referring to the drawing by reference characters I have indicated my improved saw handle generally at Iii. As shown the handle Ill includes a body portion I2 and a grip portion I3 which are of conventional design.

The body portion I2 has a slot I4 therein to receive a saw blade I5 which is secured to the handle It by the usual countersunk bolts I6. The front face of the body I2 is divided into two surfaces, one surface I'I being formed at 90 to the back or edge I8 of the blade I5 and the other surface I9 being formed at 45 to the blade back I8. Similarly the bottom surface 20 may be formed at an angle to the blade back I8 and in the drawing it is shown as at an angle of 15 to the blade back.

Mounted on one side of the body I2 I provide a metal plate 2I which is shown as secured to the body I2 by a plurality of screws 22. The

plate 2i is shaped to conform to the angle faces II, I9 and 20 of the body l2.

Mounted on the plate 2I I provide a quadrant or angle plate 23 which is pivotally secured to the plate 2I as at 24 adjacent the intersection :5 of the angle faces I! and I9. The quadrant plate 23 includes an inwardly extending flange 25 which in one extreme position of the quadrant plate 23 is in a position at 90 to the blade back I8 (as shown in Fig. l) and in the other extreme position engages the 45 face I9 of the body I2.

The quadrant plate 23 has an elongated arcuate" slot '26 therein which is coaxial with the pivot 24. Mounted on the plate H I provide a bolt 2'! which may be immovably secured to the plate 2| 'as by welding, brazing or otherwise securing it thereto. The bolt 2'! is positioned in the .elongated aperture 21 of the plate 23 and has a clamping nut 28 positioned thereon.

On the plate 2| and coaxial with the edge 29 I provide an outer indicia table 30 and an inner 1G indicia table 3|. The outer indicia table 31] is divided into a plurality-of degrees to indicate the pitches of plumb cuts for common and jack rafters from naught to twelve pitch and the inner table M is similarly divided to indicate the 15 pitches of plumb cuts for hip and valley rafters.

The portion 32 of the upper edge of the quadrant plate 23 is used as a gauge to be set at the various pitch indicia of the tables 30 and 3i to set the flange 25 at the desired degree to the 20 blade back I8.

In operation when the operator desires to mark a line on a plank at right angles to one edge thereof he places the 90 face ll against the edge of the plank and draws a line along the blade 25 back I8. When the operator desires to mark a line at 45 to one edge he places the 45 face I9 of the body on the side opposite the plate 2| against the edge of the plank and draws a line along the blade back I8. Or he may swing the 30 quadrant plate 23 to its innermost position and place the flange 25 thereof against the edge of the plank. If the operator desires to mark a 15 or line on a plank he places the 15 face 20 against the edge of the plank and draws a line 35 along the blade back I8.

When the operator desires to mark a plumb cut pitch on a common rafter he swings the quadrant to a position wherein the edge 32 thereof is in line with the desired pitch mark on the 40 table 30, he then tightens the nut 28 to firmly clamp the quadrant plate 23 in the adjusted position. Thereafter the operator places the quadrant flange 25 against the side of the rafter and draws a line along the blade back I8.

When the operator desires to mark a plumb cut pitch on a hip or valley rafter he, swings the quadrant to a position wherein the edge 32 thereof is in line with the desired pitch mark on the table 3|, he then tightens the nut 28 to firmly 5 clamp the quadrant plate 23 in the adjusted position, thereafter the operator places the quadrant flange 25 against the side of the rafter and draws a line along the blade back I8.

The plate 2| adjacent to the open edge thereof 55 is provided with a scale 33 shown as divided into twelfths of an inch and which may be used for general scaling purposes.

The outer face of the plate is provided with a data table 34. This table includes a number of columns. Column A designates the roof pitch or rise in inches per foot of run. Columns B and C indicate the diagonal lengths in inches and twelfths of an inch, respectively, for common and jack rafters while Columns D and E give the length in inches and twelfths of an inch, respectively, of hip and valley rafters. The table may be used for determining the rafter lengths and may also be used in figuring brace lengths and may be used for such other purposes as foundation layouts, etc. 1

From the foregoing description it will be apparent that I have provided a novel saw handle including angle finding means thereon and other,

data which is simple in construction and highly eflicient in use.

I claim:

In a device of the class described, a blade having a straight edge thereon, a supporting body secured to and extending above the blade, said body having a first straight edge thereon arranged at right angles to the said straight edge of the blade, said body having a second straight. edge thereon intersecting the first body straight edge and inclined to the first body straight edge, said body having a third straight edge thereon inclined at an angle to the second body straight edge, a plate member secured to said body, said plate member having straight edges aligned with the said first, second and third body straight edges, a quadrant member mounted on said plate member to pivot over the plate member about an axis disposed adjacent to the intersection of the first and second body straight edges, said quadrant member having a flange thereon directed towards said blade and adapted in one position to engage the second body straight edge to limit the movement of the member, said flange in another position being in alignment with the first mentioned body straight edge, said plate member having a data table thereon, said table including common and hip and valley rafter lengths for various pitches, said quadrant member including a portion alignable with said data table and means to hold said quadrant member in adjusted position.

CLYDE I. WELCH.