US291187A - Joseph g - Google Patents

Description

(No Model.) A J. G. GROEP.

SAW GUARD.

Y Patented Jam. 1, 1884.

VNo.1.291.187..

MRM

NiTnn STATES PATENT Trice..

JOSEPH GROFF, OF OONNERSVILLE, INDIANA.

SAW-GUARD.

SPECIFICATION forming part of Letters Patent No. 291,167, dated January 1, 1884,

i l Application filed October 15, 1F83. (No model.) A

To @ZZ whom it 771,661/ concern:

Be it known that I, JOSEPH G. GRoFr, of Connersville, in the county of Fayette and State of Indiana, have invented certain new `and useful Improvements in Guards for Circular Saws; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, and to the figures and letters of reference marked thereon. l

This invention relates to that class of sawguards in which the hood normally rests upon the saw-table or near to it, rises automatically upon the approach of the board to be sawed, bears upon the board while being sawed, and drops back to normal position after the board has passed the saw.

The particular improvements which form the subject of the present patent will be understood from the following specification and claims,tak.en in connection with accompanying drawings.

Referring to said drawings, Figure l represents a side elevation-of a saw-guard embodying my improvements, the saw-table being shown in section. Fig. 2 is a sectional view taken on the line a' x of Fig. 1, and Fig. 3 is an enlarged view of a portion of the hoodi frame and its connection.

Similar letters of reference in the several figures denote the saine parts.

The hood proper consists of an arched metal portion, A, having the removable sides B attached by screws or otherwise, as shown. An upwardly-inclined projection, O, is formed upon or secured to the forward portion of the part A, while rearwardly-extending arms D D' are formed upon or secured to said part A at therear thereof, as shown in Fig. l. The said rearwardly-projecting arms D D embrace a vertical plate, F, and are connected at their rear extremities by a cross bolt or screw, Z. The plate F is formed with a backwardly-inclined shank, which ts within a corresponding socket, G, secured to the saw-table, and its upper part passes up between the arms D D', and extends forward and partially over the hood, the latter being slotted, as shown by the dotted line, to receive it. The plate is provided with a long Vertical slot, or preferably with two vertical slots, S S', separated by a solid portion, I, and in these slots rollers q g, mounted in the arms D D', respectively, are adapted to work. The construction of these rollers and the manner of mounting them are best illustrated in Figs. 2 and B-t-hat is to say, each roller is provided with a peripheral groove to receive the edges of the plate F,and is secured by :means of a screw-bolt, j", passing through the arms D or D', as the case may be, and through said roller. One end of the screw-bolt has a milled head, e, and the other end provided with a screw-nut, e'. The apertures in the upper arms, D, are round, while those in the lowerarins, D, (marked g,) are oblong and extend horizontally, as shown clearly in Figs. 1 and 3. Each roller is also preferably provided with a hub, d, of a smaller diameter on each side, which hub projects within the opening through the arms D or D', as the case may be. Instead ofthe hubs, small rollers may be arranged upon the bolts with the same results. The upper portions of the slots S S' are enlarged, as shown in Fig. l, to enable the rollers to be inserted in said slots. In front of the slots S S the plate F is provided with another slot, S2, in which is arranged a clamping set-screw, T, the office of which is to regulate the normal height of the hood with respect to the saw-table. The sides of the hood at the bottom are formed into inclines o and w, and are re-enforced by a rod of metal, m, to give additional strength, and pivoted to the projection C, at the forward end of the hood, isaserrated or toothed dog, E, which is pushed up out of the way when the material to be sawed is advancing, but automatically resists any backward movementof the material by catching into the same. In Fig. l the hood and connected parts are shown in their normal position ot' rest. Upon the advance of the board to be sawed, the forward end of the board, striking against the upturned projection C, causes the hood to turn on the upper bolt, f, as a pivot, the horizontal slot g permitting this movement. rIhen, as the board further advances, its forward end strikes the incline c and raises the rear end of the hood, and causes the rollers q q to travel up the vertical slots S' S', as will be readily understood.

Vhile the board is being acted upon by the Ico j saw any tendency to a backward movement is l 2. The combination ol' the plato having the i5' resisted by the dog,` E, and as the board passes two vertical slots for the rollers, and the third from under the hood its rear end7 passing' along slot for the adjusting set-screw, with the hood the inelines w r, allows l'he hood to again rehaving the rearwardlywextending arms prov 5 suine its normal position, as will be nndervided with the horizontal slots7 the rollersearstood. I ried by said ar1ns,and the adjusting set-screw, 2o

Havingthns dcseribedinjv invention, Iolaiin i substantially as described. as newl. The plate havin` the Vertical slol's7 the JOSEPH (i. HRUFI. 1o hood having the rearwardly-extended arms embracing the plate, The lower arlns having' j Witnesses: the horizontal slots, in combination with the WILLLUI. Sxinisn, rollers carried bysaid arins and workingin the Josnrn L. Sarina. slots ofthe plate7 substantially as described.

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