US1494342A

US1494342A - Saw guard

Info

Publication number: US1494342A
Application number: US428369A
Authority: US
Inventors: Cramer William
Original assignee: Truck Tractor and Manufacturing Co
Current assignee: Truck Tractor and Manufacturing Co
Priority date: 1920-12-04
Filing date: 1920-12-04
Publication date: 1924-05-20
Anticipated expiration: 1941-05-20

Description

w. CRAMER SAW GUARD May 20, 1924.

' Filed Dec. 4 1920 I citizen of the United States, residing at. the,

Patented May 20, 192%.

pa rs star WILLIAM GRAMER, OF ST. LOUIS, MISSOURI, ASSIGNOR TO TRUCK, TRACTOR, AND

earner arise,

Iv'IANUFACTURING COMPANY, OF ST. LOUIS, MISSOURI, CORPORATION OF MIS- SOUR/I.

SAW GUARD.

Application filed December 4, 1920. Serial No. 428,369.

T 0 all whom it may concern;

Be it known that I, WILLIAM GRAMER, a

city of St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Saw Guards, of which the following is a specification,

This invention is a sawguard. The objects sought are to provide .adevice of this kind that is adapted for use with any thickness of material to be cut and that is reliable and effective and that is simple in construction and inexpensive.

In the accompanying drawings forming part of this specification, in which like numbers of reference denote like parts wherever they occur,

Figure 1 is a top plan view;

Figure 2 is a side elevation; and

Figure?) is a vertical sectional view.

The table 1 supports the saw 2 in any suitable manner.

i The guard 3 is composed of the plurality of members 4 and 5, which are tied together by rod 6. Washers 7 and keepers 8 complete the tying.

The band 9 is a safety guard for the guard 3, and prevents accidents by abrasion due to the presence or rotation of guard 3.

The guard 3 being bifurcated, spans or straddles saw 2, and is held in place by. the pair of straps 10 and 11. These straps are pivoted at 12 to rod 13, which is attached by bolts 14 to arm 15 supported by standard 16.

Arm 15 is supported through its collar 19 by rod 17, which is journaled'in a bearing 18 carried by a standard 16.

A brace 20 extends diagonally from rod 17, which it encircles at 21, to a' connection through eyelet 22 fixed in the upper side of the bar or rod 13 at a point between the ends of'a pair of straps 10 and 11 which are secured at the opposite sides of the forward end of the bar or rod 13, substantially as straps 10 and 11, spring normally holding bar 24 down and with it the members 4: and 5 of guard 3 so as to envelop thedangerous part of saw 2, as shown in Figure 2.

Saw 2 is rotated by shaft 26. Table 1 is supported by the main frame 27, upheld by standards 28.

a any thickness of the material 29 that may be passed underneath guard 3 to be sawed by saw 2. Bar 24: is preferably made of spring steel, and is preferably located directly in alinement with saw 2 and acts as a kerf spreader.

Spring 25 and the sp1-ing lil e quality of bar 24 allow automatic adjustment of guard 3, which is thus always held in engagement with the material 29 to be cut. This adjustment for relatively thick or thin ma terial is quite important and a great convenience, as it saves much time that would otherwise be lost in adjusting a guide more or less like guard 3 from one thickness of material 29 to another. In this machine, the thickness of the material determines the. degree of elevation of guard 3 above table 1, and the guard 3 is ready at all times for immediate use regardless of the thickness of material 29, and assists in guiding such material as well as guarding saw 2 and pre venting fragments from flying away from saw 2.

The rod 13 is pivoted at 30 to the rod 17. and this allows the guard 3 to rise or fall as may be required by the thickness of the material 29. The brace 20 prevents wobbling of rod 18, and is itself pivoted at 21 to rod 17. Thereby a slight but sufiicient flexible up-and-down connection is established for guard 3 with rod 17 and the slidable arrangement of rod 20 through eyelet 22 produces a slight flexible lateral arrangement of guard 3. j

The sawdust is caught in chute 31 and carried away by pipe 32 in the usual manner.-

A sawguard that is automatically flexible or adjustable sidewise as well as vertically is a desideratum.

, Having thus described this invention, I hereby reserve the benefit of all changes in form, arrangement, order, or use of parts,

as it is evident that many minor changes may be made therein without departing from the spirit of this invention or the scope of the following claims.

I claim:

1. In a machine of the class described, the combination With a saw table and a circular saw operably mounted thereon, of a supporting rod secured on said table in rear of and at right angles with respect to the saw and extending for a distance to one side of the same, a rod pivoted at one end to said supporting rod and in line with the saw, a guard carried; at the free end of said rod and overlying the saw, an eye carried by said red at a point inwardly from said saw guard, a brace rod pivoted at one end to said supporting rod and having its other end engaged through said eye, said brace rod extending diagonally between its points of connection with said supporting rod and said eye.

2. In a machine of the class described, the combination with a saw table and a circular saw operably mounted thereon, of a supporting rod secured on said table in rear of and at right angles with respect to said saw and extending for a distance to one side of the same, a rod pivoted at one end to said supporting rod and in line with the saw, a saw guard carried at the free end of said rod and overlying the saw, an eye carried at the upper side of said rod at a point inwardly of said saw guard, a brace rod pivoted at one end to said supporting rod and having its other end engaged through said eye, said brace rod extending diagonally between its points of connection with said supporting rod and said eye, and a clamping collar cooperative with the pivoted end of said brace rod for securing the same against lateral movement durin the operation of the machine.

3. K saw guard, comprising a. support, a rod mounted in and projecting from the support, a bar mounted for rotative movement upon the rod remote from the support, means connecting said rod adjacent the support and said bar remote from said support to provide for lateral stability of the bar, a U-shaped frame pivotally connected at the forward end of the bar, spaced guard members rotatably mounted in said frame, a guard band overlying and spaced from said members and having one terminal connected to the U-shaped frame and the other terminal secured to the bar, and spring supported means depending from the bar to permit vertical play of the guard as a whole under tension.

In testimony whereof I hereunto afiix my signature.

WILLIAM CRAMERM