US 615833 A
Description (OCR text may contain errors)
, No. (5,833. Patented Dec. I3, I898.
G. A. FISHER. SAW GUARD.
(Application filed Oct. 7, 1898.)
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UNITED STATES PATENT OFFICE.
GEORGE A. FISHER, OF I-IARTFORD,'CONNECTIOUT.
SPECIFICATION forming part of Letters Patent No. 615,833, dated December 13, 1898.
Application filed October 7,1898. Serial No. 692,933. (No model.)
$0 at whom it may concern:
Be it known that I, GEORGE A. FISHER, a
citizen of the United States, residing in Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Saw-Guards,of which the following is a specification.
This invention relates to saw-guards of that class including aguard proper or blade disposed at the rear and substantially in the plane of a circular saw, and which guard or blade serves to enter the opening formed by the saw for separating and holding apart the two sawed sections of a board or plank, and consequently preventing such sawed portion from being taken upby the teeth of the saw and subsequently released, as this last-mentioned action usually causes the board or plank to buckle and injure or maim the person feeding the Work.
My improved saw-guard includes, in connection with a slotted base-plate, which is adapted to be secured to a saw table or bench adjacent to the saw, a carrier havinga slotted horizontal portion in sliding engagement with the base-plate and a vertical portion, a longitudinally-slotted blade fitting against said vertical portion, and the latter having means for preventing lateral movement of the blade, and said blade being longitudinally slotted, and independent devices for adjustably connecting the horizontal portion of the carrier to said base-plate and for adj ustably connecting said blade with the vertical portion of the carrier.
,1 also employ, in combination with the guard, alongitudinal bar connected with said guard and having its forward or free end disposed over the front or entering end of the circular saw, and from this bar a second or auxiliary guard is suspended, said auxiliary guard serving to prevent dust which flies from the saw from entering the eyes of the attendant. The auxiliary guard usually consists of a sheet or piece of cardboard, leather, or other suitable material adjustably attached to the free end of the bar, while the latter is detachably united to the main guard. The
bar usually has a transverse or angular or;
tension at one end, which loosely fits in a socket formed near the upper end of the main guard, the latter preferably having an opening communicating with said socket into which a tool may be inserted to force such transverse extension out of its seat.
In the drawings accompanying and forming part of this specification, Figure 1 is a longitudinal central section of a saw table or bench and a circular saw, and also illustrates my improvements in connection therewith. Fig. 2 is a plan View of the same. Fig. 3 is a side elevation, on an enlarged scale, of a portion of the table, the blade orguard, and the means for connecting the same to the table; and Fig. 4 is a front view of the same.
Similar characters designate like parts in all the figures of the drawings.
My improved guard is adapted to circular saws, and in the drawings Ihave represented a saw bench or table A, having a longitudinal slot or opening through which the circular saw 6 works, and the direction of rotation of said saw and the line of feed of the board or plank are indicated by the arrows in Fig. 1.
My device involves in its construction a guard, as B, mounted at the rear of and in the plane of the saw, said guard consisting in the present case of an elongated blade adaptedto enter the opening formed by the saw in a board after the same leaves the saw and to hold the two sections sufficiently far apart as to prevent the same being taken up by the teeth of the saw at the discharge or rear end thereof.
The guard or blade B is disposed in proximity to the saw, as indicated clearly in Fig. 1, and is slightly beveled along its front edge and is made of a thickness substantially agreeing with that of the saw, whereby it is prevented from unnecessarily widening the saw-cut, and said guard is adjustably connected with a base-plate, as 7, through the intervention of a carrier, as 8. lhe plate 7 is usually connected to the under side of the saw-table A, adjacent to the slot 5, by means of screws 9, and is longitudinally slotted at 10, said slot being substantially T shapein crosssoction to receive the similarly-shaped bolt 12', which bolt passes through the open ended longitudinal slot 13 in thehorizontal portion 1t of the blade-carrier 8, this construction permitting an adjustment of the carrier transversely of the plate '7, and said carrier being held in an adjusted position by the nut 15 in threaded engagement with the bolt 12. It will be apparent also that by this construction the carrier 8 may be removed without detaching the nut 15, it simply being necessary to loosen the latter for this purpose.
The guard or blade B, which may be curved slightly, as represented in Fig. 1, projects through the slot 5 and is adjustably fitted to the vertical portion 16 of the carrier and is longitudinally slotted, as at 17, and through this slot the bolt 18, mounted upon said vertical portion 16, is adapted to pass, this construction permitting of the up-anddown movement of said blade, which is held in its adjusted position by the nut 19 on said bolt.
By the two adjustments hereinbefore described it will be evident that the bar B can be moved in different directions, either vertically or toward and from the base-plate, to adapt the same to saws of difierent diameters and' sizes, and said bar is preferably held against edgewise or lateral movement by the flange or rib 20 along one side of the vertical portion 16 of the carrier and against which said blade is adapted to bear, as represented in Figs. 1 and 3.
In connection with the guard B, which constitutes a main guard, I provide a second or supplemental guard which is located over the front or entering end of the saw and which serves to prevent dust and chips which fly from the saw from entering the eyes of an attendant, and said supplemental guard consists in the present case of a sheet of pasteboard, leather, or other light material suspended from the free end of the bar or wire 26, said bar being connected at its opposite end to the blade B and preferably having at said last-mentioned end the transverse extension 27, loosely fitting in the socket 28 near the upper extremity of the blade, and said socket communicating with the opening 29.
In Fig. 1 the parts are shown in their assembled relation, and should any difficulty be experienced in dismounting the bar a tool can be inserted in the opening 29 to bear against the angular extension 27 and force the same from its seat. That end of the bar 26 near the angular extension 27 lies in a short groove 30, leading from the socket 28, and the walls of the groove serve to prevent sidewise movement or swaying of the bar. The supplemental guard 25 is held in place by the nuts 31 and 32 on the threaded end of the bar and one of which serves as a check for the other to maintain said supplemental guard in an adjusted position.
The saw-guard proper or blade B is of differential thickness, it being thicker between The blade B is reversibly supported by thecarrier 8, and in Fig. 1 the thicker portion of the blade is represented as being uppermost, and should it be necessary to utilize said thinner portion the position of the blade may'be readily reversed by removing the nut 19. When the blade is in position, the nut can be turned on its bolt to aid in holding the same.
Having described my invention, I claim- 1. In a saw-guard, the combination, with a slotted base-plate, said slot being of T shape in cross-section, of a carrier provided with a horizontal portion having an open-ended slot, and said horizontal portion being in sliding engagement with the base-plate, and said carrier also having a vertical portion provided with a flange along one end thereof; a longitudinal blade fitting flatwise against said vertical portion and bearing against the flange; a T-shaped bolt fitted in said T-shaped slot and passing through said open-ended slot and provided with a nut; and a second bolt supported by the vertical portion of the carrier and passing through the slot in the blade and provided with a nut.
2. The combination, with a saw guard adapted to be disposed in the plane, and at the rear, of a saw, said guard having, respectively,a socket near its upper end and a groove running lengthwise of said guard, of a longi* tudinal bar provided with a transverse extension at one end removably fitted in said socket, and said bar also lying for a portion of its length in the groove, and the forward or free end thereof being disposed over the front or entering end of the saw; and a second guard suspended from the free end of said bar and serving to prevent the dust which flies from the saw from entering the eyes of an attendant.
3. The combination, with a saw A guard adapted to be disposed in the plane and at the rear of a circular saw, said guard having, respectively, a socket near its upper end, an opening communicating with said socket, and a groove leading from the latter, of a longi tudinal bar provided with a transverse extension at one end fitting in said socket, and that portion of the bar adjacent to said trans verse extension lying in said groove, and the forward or free end of said barbeing disposed over the front or entering end of the saw, and a second guard suspended from the free end of said bar and serving to prevent dust which gitudinal saw-guard attached substantially I of its middle and adapted each to enter a saw midway of its length to said carrier, and of kerf or cut, and one of said working portions diiferent thicknesses, respectively, at oppobeing of a different thickness than the other. IO
site sides of its point of attachment to adapt GEORGE A. FISHER. 5 the same to saws of different thicknesses. Witnesses:
5. A saw-guard having two Working por- 'HEATH SUTHERLAND,
tions located, respectively, at opposite sides HENRY BIssELL.