US 1381612 A
Beschreibung (OCR-Text kann Fehler enthalten)
G. A. ANDERSON.
APPLICATION FILED 001.24.19z9.
1,381,612, Patented June 14,1921.
' ATTORNEY PATENT OFFICE.
GEORGE A. ANDERSON, F ENSLEY, ALABAMA.
Specification of Letters Patent.
Patented June 14, 1921.
Application led October 24, 1919. Serial No. 333,844.
T 0 all wiz-0m t may conce/Mt.'
Be it known that I, GEORGE A. ANDERSON, a citizen 'of the United States of America, residing at Ensley, in the county of Jefferson and State of Alabama, have invented certain new and useful Improvements in Saw-Guards, of which the following is a specification.
My invention relates to a guard for rip saws.
Heretofore guards for rip saws have been mounted in various ways so as to give and permit the board or timber' to pass under them to the saw, but all of the saw-guard mountings which I have seen have been of such character as to bind and present some difficulty to the workmen in introducing the forward end of the timber under the guard.
The chief object of my invention is to provide a free working or floating attachment for the guard which is of such character as to avoid any binding or strain on its standard and which is particularly adapted to cause no additional work or annoyance to the operator.
A further object of my invention is to attach the guard to a standard by links of such length that the guard will adjust itself readily for use with all sizes of rip saws without requiring any adjustment.
A further object is to so design the parts so that they may be attached and detached from the saw table with the least possible trouble and in this connection I preferably form the standard and its base as integral members which are attached by bolts passing upwardly through the table.
A further Object is to design the standard which supports the swinging links of the guard so as to enable the guard to be closed overhead close up to the standard so as to avoid upwardly flying splinters. To this end the standard is made dceply'concave on its forward edge.
My invention also comprises the novel details of construction and arrangements of parts, which in their preferred embodiment only are illustrated 1n the accompanying drawings, in which Figure l is a side View of my invention showing the guard in one operating position.
Fig. 2 is a partial plan and 4partial sectional view taken on the line 2--2 of Fig. l.
Fig. 3 is a side elevation showing the guard in dilferent operating positions.
Similar reference numerals refer to similar parts throughout the drawings.
I have shown my invention as a guard for a rip saw l mounted in the customary manner so as to work through a slot in the table 2. A standard 3 is formed narrow enough to be inserted through the saw slot in the table and it has an integral base et adapted to be connected to the underface of the table by countersunk screws 5 and wing nuts (5. The top of the standard is provided with a hole to receive a pivot bolt 7 forming a bearing from which a pair of links 8 are hung, one link being disposed on each side of the standard and each mounted on an overhung end of the bolt T.
The bolt is held in position by a wing nut 9 which is readily removable for the easy attachment of the bolt and links S, thereby permitting the standard to be removed downwardly through the table by removing nuts 6. The free ends of these links are connected by pivot pins 10 to rearwardly extending arms ll of the saw-guard l2. These arms ll. as shown in Fig. 2, pass freely on opposite sides of the standard and are disposed at an upward and rearward inclination from the rear end of the guard proper. The guard is formed of an arcuate hollow casting having its side walls 13 provided with elongated slots to lighten it and having their bottom edges struck on a curve substantially conforming to top curve. The sides 13 are integral with the rear arms ll, being ,drawn inwardly after leaving the guard proper so as to give the arms the desired closer spacing'. The guard has a top 14 which terminates near its rear end and which extends to the tip of the forwardly and upwardly inclined guide extension 15. This extension is closed on its undcrface and has mounted in the hollow interior thereof a plurality of antifriction rollers 1G. the peripheries of which project slightly through slots in the underface of the extension and form antifriction guides to facilitate the passage of the timber under the guard. The arcuate main body of the guard is left open underneath and is of `sufficient depth and length to safely shield the operator from the laterally flying splinters during the sawing operation.
It will be observed from Fig. 1 that the rear end of the top 14 stands juxtaposed to the forward edge of the standard and it will also be seen that the standard has its forward edge above the lower position of the guard cut away on a deep concave at 17 which is projected so as to permit the guard to follow freely the rearward swing of the links 8 without binding against the standard. This is important, as the top 14 of the guard must extend far enough rearwardly to prevent the escape of upwardly and rearwardly flying splinters and at the same time it must not engage or bind against the standard as that would lnterfere with the free mounting or floating suspension of the guard.
In operation, having attached the standard to the table and the guard to the standard in the manner described, the guard will drop freely to the table and present its inclined forward extension with the exposed rollers to be engaged by the oncoming board. As the board strikes the guard it vyields freely rearwardly toward the standard and in doing so it both lifts itself and l is tilted, causing its inclined face to slant more and more sharply toward the on coming board and thus permit the latter, particularly after it engages the rollers, to ride freely and easily under the guard without it being necessary for the operator to touch or ease the guard during the operation. During the sawing operation, the guard slides freely on top of the timber with its top held close to the standard and it is therefore adapted to prevent the upward escape of splinters while the sides of the guard prevent the lateral escape of splinters. The most dangerous time is at the completion of the sawing operation and it will be observed that the ard is so mounted as to drop freely behmd the rear end of the timber the moment the latter passes it and is thus in position to catch any rearward flyin splinters and to prevent a back kick of t e timber. As soon as the timber passes the guard the latter drops freely to the saw frame bed and rests there until the next operation, it
, being observed that the length of the links is such as to adapt the guard without adjustment of its part or of the standard supporting it to be used with all sizes of rip saws and to take care of the maximum range of timber sections to be sawed. The deep concave in the forward edge of the standard enables me to use a guard closed overhead almost up to the standard as it hangs normally which can follow the rearward swing of its supporting links under pressure from the timber without engaging the standard.
This invention is not intended to be restricted in scope to the specific embodiments shown, but contemplates such modifications as come within the spirit and scope of the claims. f
Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is Y,
1. In combination, a standard mounted to project above the saw table in line with the saw, a swinging link pivoted to the top of the standard, and a freely floating sawguard having a rearwardly projecting arm pivotally connected only at its rear end to the free end of said link, said guard being closed in overhead and said standard having its front edge cut away to permit the rear end ofthe guard to follow freely the rearward swing of its supporting link without binding against the standard, substantially as described.
2. In combination, a standard mounted to project above the saw table in line with the saw, swinging links pivoted to opposite sides of the top of the standard, and a freely oating saw-guard having its rear end bifurcated to straddle the standard and pivotally connect to the free end of said links, said standard having its forward edge cut away to clear the rear end of the guard as it swings rearwardly and upwardly in service.
3. In combination, a standard mounted to project above the saw table in line with the saw, a freely floating saw-guard disposed in front of the standard and having a rearwardly and upwardly extending arm, and an upwardly and forwardly projecting link pivotally connecting the rear end of said arm to the top of-the standard, the forward edge of said standard being'cut away to permit the rear end of the guard to follow freely the rearward and upward swing of its supporting link without binding against the standard.
4. In combination, a standard ada ted to be mounted on a saw table in line wit a saw and having an overhanging forward top portion, a pair of links pivotally connected to said overhanging top portion, a freely floating saw-guard. having rearwardly and upwardly extending arms adapted to straddle the standard, and means to pivot the rear ends of said arms to said links, said arms being designed when the guard is at rest on the saw table to support the links at a rearward inclination.
5. In combination, a standard adapted to be mounted on a saw table in line with a saw and having an overhanging forward top portion, a pair of links pivotally connected to said overhanging top portion, a freely floating saw-guard having rearwardly and upwardly extending arms adapted to straddle the standard, and means to pivot the rear ends of said arms to said links, saidarms being designed when the guard is at rest on the saw table to support the links at a rearward inclination of approximately 45.
6. The combination of a standard, means to attach said standard to the saw table, said standard having its forward edge cut away on a deep concave arc, a pair of links, a readily detachable pivot for connecting said links to the top of the standard on each side thereof, a ioating saw-guard curved in side elevation and having rear- Wardly extending arms adapted to straddle i and project substantially to the rear of the forward edge of the standard, and means to pivotally connect the rear ends of said arms to the links with the latter disposed at a rearward inclination, substantially as described.
In testimony whereof I aix my signature. i
GEORGE AANDERSON. W'itness: