US922840A - Sawdust-catching attachment for circular saws. - Google Patents

Description

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Y LYLIOTIOI HLBD API-.11, 01. Y 922,840. r mendmayz, 1909.

Alianza (not shown), the lower portion of the vsaw ex- DANIEL J. BEMILLER, Ol." BUTLER, OHIO.

To atl whom it may com-em:

Beit known that I, DANiEL J. Brummen, a citizen of the United States, residing at Butler, in the county of Richland, State of Oliio, have invented certain new and useful Improvements in Sawd ust-Catching Attachments for Circular Saws; and i do hereby deelare the following to be a. lull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to improvements in sawdust catching attachments for circular saws, and it aims to provide a device of that natni'e consisting of a receptacle having a discharge spout projecting from its bot tom wall and connected with an exhaust pipe, which is in turn connected with a suction fan, the end walls of the receptacle tapering toward the discharge spout to direct the sawdust thereinto.

Vith the above and other ends in view, the invention consists in the construction, combination, and arrangement of parts, all as hereinafter more fully described, speciieally claimed, and illustrated in the aecompanying drawings, in which like parts are designated by corresponding reference numerals in both views.

Ol" the said drawings-Figure 1 is a l'ront elevation of tlie'coni plete sawdust removing,r apparatus. Fig. 2 is a .transverse vertical section on the line 2-2 of Fig. l..

Referring more particularly to the drawings, the numeral 5 designates a circular saw of conventional type, mounted upon its shaft G, which is diiven from any source of power tending into the sawdust-catching receptacle, generally designated 7. This receptacle coniprises a pair of semi-circular wooden sidepieces S, which are arranged in spaced relation to each other, and are connected at their cuived edges by a metal strip 9. Through the strip 9 intermediate its ends is formed a discharwe opening, which communicates with one en of a discharge spout 11, which extends tangentially from the receptacle, as shown, the up er side edges 10 of the s out being extende directly across the outer aces of Vhe sides 8, and secured thereto, as shown n Specification of Letters latent. Application led April 11, 1907. Serial No. 367,618.

in Figs. 1 and 2. To the opposite Vend of curved to form a continuation of the curved rear riin and the u iper edge being substantially tangent to t ic path ol' the saw teeth whereby suction is obtained entirely below the path of the saw teeth and the lull opening to the suction pipe is brought closely adjacent to the deepest part of said receptacle.

Patented May 25, 1909.

the discharge spout is connected one end of an exhaust pipe 12, whose opposite end is fitted in the inlet opening 13 of an exhaust 55 fan 14. Y

'hile the sideiieces 8 of the receptacle 1 have been above( escribed as approximately semi-circular, it will be observed from Fig. 1 that the right-hand curved edge of the side shown therein forms an arc of a circle, whose diameter is slightly greater than that of the left-hand are, the connecting strip 9 being correspondingly bowed. Owing to this construction and to the fact that the under face. of the spout 11 forms a continuation of the, right-hand are, it will be apparent that the sawdust thrown against the. strip t) by the -,saw will be directed into t-lie discharge. spout. Itwill be likewise obvious that by reason of suoli construction, it is correct to say that the receptacle 1s provided with end walls which converge toward the discharge openmff when power is applied to the drive-shaft of the fan and the saw is ruiming, all sawdust will be d rawn through the discharge opening and spout into the exhaust pipe and through the latter into the f an, whence it is discharged through the outlet pipe 15 thereof.

The; sides of the receptacle are preferably formed of wood to prevent any injury to the saw teeth from contact therewith, in the. event of the saw becomingloosened and wabbling on its shaft.

Further description of the invention and its operation is deemed unnecessary in view of the foregoing.

W'hat is claimed, is-

In a device of the kind described, the com bination with a rotary saw; of a sawdust catching receptacle into which the lower portion of the saw extends, said receptacle coinprising a pair of spaced sides with the front portion concentric with the saw and the rear portion forming substantially au iuvolute curve, a rim extending between said sides and cach of the curved portions, said rims terminating with said curved portions at the 100 the rear bottom portion of the spout beine` D. l n

lt will be apparent from the foregoing that ln testimony whereof, I all'ix my signature,

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