US2618300A - Stop for cut-off saws - Google Patents

Description

Nov. 18, 1952 J. P. FREUDENTHALER 2,518,300 I STOP FOR CUT-OFF SAWS Filed Nov. 5, 1943 ad ma/er Patented Nov. 18, 1952 STOP FOR CUT-OFF SAWS John P. Freudenthaler, Montgomery, Ohio Application November 5, 1948, Serial No. 58,582

2 Claims.

(Granted under the act of March 3, 1883, as amended April 30, 1928; 370 0. G. 757) The invention described herein may be manufactured and used by or for the Government for governmental purposes, without payment to me of any royalty thereon.

The present invention provides improvements in gauges or stops adapted to be used in conjunction with saw tables upon which boards, lumber or timbers are being sawed to a definite predetermined length.

The invention more particularly relates to saw tables, and still more particularly to the cut-off stop for the same and the means for adjusting it.

In cutting lumber such as boards or timbers into pieces of any desired length, it is necessary to set the cut-01f stop at the proper distance from the saw, and it is very desirable that this be done without the necessity of measuring it every time or resorting to graduations upon the table top.

This is accomplished in accordance with the present invention by providing a notched or serrated angle bar that may be clamped to the saw table top, with stop-mounting guide members adjustably mounted on the said angle bar, there being provided means for locking the stop in predetermined position of adjustment and means enabling both coarse and fine adjustment of the stop.

The invention will be understood more readily by reference to the accompanying drawings, wherein:

Fig. 1 represents a perspective view of a construction embodying the improvements of the present invention;

Fig. 2 is a longitudinal sectional elevation of the device of Fig. 1;

Fig. 3 is a diagrammatic plan view of the device of Fig. 1 applied to a saw-table top;

Fig. 4 is a transverse sectional elevation taken on the line IV-IV of Fig. 2, looking in the direction of the arrows;

Fig. 5 is an enlarged fragmentary detail of the left-hand mounting as viewed in Fig. 1, taken on line VV of Fig. 1.

Referring more particularly to the drawings, the illustrated embodiment of the invention comprises an angle bar I or other member having a planar web, which is adapted to be secured by screws 9 or equivalent fastening means, to a saw-table top H, the angle bar 1 being provided along its upstanding edge with equally spaced serrations or teeth I3, which have a uniform, known spacing, and which slope correspondingly, as is indicated at l5. Any conveniently formed member having an elongated planar portion and means for attaching the member to a supporting surface to allow the planar portion to extend normally therefrom may be used as an equivalent of the angle bar 1.

Slidably mounted on the angle bar 1 is a channel member l1, the sides IQ of which engage the sides of the upstandin web of the angle bar, the channel member |1 being slidable along the top of the teeth l3. The top 2| of the channel member I1 is recessed or cut away to receive a pawl or dog 23 that is maintained yieldably pressed into the teeth |3 by the action of a spring '25 secured at 21 to the top of the channel member, and which fits into a slit provided therefor in the pawl 23, as will be apparent from the drawings. The pawl 23 may be locked in position by a thumb-actuated locking screw 29 for preventing any possibility of accidental displacement of the pawl from its adjusted position.

Projecting laterally from the channel member H are parallel guides or guide flanges 3|, 33 through which holes are provided for slidably passing guide rods 35, 31 that are secured in the stop member 39. The guides 3|, 33 are also provided with registering holes for receiving the shank 4| of a micrometer screw that is operated by turning a knurled head 43 therein. The shank 4| of the micrometer screw is provided with threads 45 of small pitch, the end guide 33 being correspondingly internally threaded to allow for movement of the micrometer screw. The end of the shank 4| is freely turnable in the stop member 39, the end of the shank 4| being provided with an annular groove 41 in which a locking ball 49 is maintained by pressure of a compressed coil spring 5| secured in place against a machine screw 53.

The parallel guides 3|, 33 prevent lateral turning of the stop member 39, the guide rods 35 and 31 being spaced in diagonal relation relative to the stop 39, the shank 4| of the micrometer screw being mounted intermediate the guide rods 35 and 31.

In opera-tion, in order to assure the sawing oii of a definite predetermined length of a piece of work 55 by a saw blade 51, the channel member I1 is adjusted coarsely by moving it and its pawl 23 along a requisite number of notches or teeth l3, the pawl 23 then being locked against accidental displacement by tightening the locking screw 29. It is convenient to have the teeth l3 spaced equally an inch apart, fractions of an inch being obtained by actuation of the knurled head 43 of the micrometer screw, which effects a fine adjustment of the stop member 39 against which the work-piece 55 is brought for sawing oif the desired length of lumber by the saw 51.

It will be seen that the device of the invention is rugged, but easily manufactured and operated and enables accurate repeating of desired sawed ofi lengths of lumber, as all movable parts are guarded againstaccidental displacements evenof small magnitudes; When desired, removal of the screw 53 releases the coil spring 5| and the locking ball 49, thereby permitting removal of the shank 4! of the micrometer screw fromthe stop.

It will be understood that theillustrated-embodiment of the invention is illustrative only of one form of construction which the invention may take without departing from the inventiveconcept, and that many structural details may be modified in manners readily apparentto one skilled in the art. Accordingly, it will be understood that it is intended and desired to embrace within thescope of'theinvention such modificationsand changesv as may-.benecessary to adapt it. to varying conditions. and uses, asdeflned by the appended claims,

Having thus. described my-invention, what I claim as. .nevrand wish tosecure by Letters Patent is:

1. A stop for cut-ofi saws comprising. acsupport; an elongate.d"angle.- bar secured to the support-with'one web projecting. normal to the sup?- po'nt; said .webhaving a serrated free edge forming a, plurality of equally. spaced teeth, an-elonated channel member mounted. astride the serratedifree. edge. of. theangle barforlinear sliding movement therealong, a pawl extending through the. bight-of the channel. member and removably engaged in .the teeth of the angle-bar, a. leaf spring attached to. both the pawl and the channelrmember for biasing. the pawl 'towardthe angle bar, a thumb actuated locking screw threaded through the channel member-and frictionally engaging the pawl, said =channelmemher having. integral parallel guide flanges pro..- jectingi normally. therefrom, said guide flanges having; spaced. aperturesinthe. same-relative positions therethrough, parallel gu-idesrods jour naled in apertures in the. guide flanges for-longitudinal slidingi motion parallelzto the channel member and totheangler bar,- a micrometer screw. extending: through apertures-mtheeguide flanges parallel .to the guide rods, one-aperture in one guide flange being threaded and meshing With-the micrometer-screw, a saw stop positioned adjacent and normalto-the angle bar, attached to ends of the. guide rods and rotatably receiving one-end of (the micrometer screwwhereby coarse adjustment of the saw stop may be efiectedby movement of the channel member relative to the angle bar and fine adjustment may be effected by rotation of the micrometer screw to cause movement of the saw stop relative to the guide flanges of the channel member.

2. A stop for cut-ofi saws comprising an elongated planar member adaptedto besecured to a surface and project normally therefrom, said elongated member having a serrated free edge forming a plurality of equally spaced teeth, an elongated channel member mounted astride the serrated free edge of the elongated member for linear sliding movement therealong, a pawl attached to the channel member by means of a spring and engaged in the teeth of the elongated member, said spring biasing the pawl into the teeth, means for locking the pawl in a predetermined position, said channel member having parallel guide flanges projecting therefrom normal to the channel member and to the elongated member, said guide flangeshavin spacedaperturestherethrough in the same relative positions, one of said guide flanges having an integral thread in one aperture, 9, saw-stop member positioned adjacent said .channel member, saidstop member being provided with spaced guide rods extending parallel to thechannel. member-and being journaled in one aperture in, each guide flange, and a micrometer screw havin one. end pivotally secured to the stop member and extending therefrom parallel: to the. guide rods 'andthrough one aperture. in each guide flange including the threaded aperture in which it engages .the threads whereby coarse adjustment of the saw stop member maybe effected by. movement of .thechannel member alongithe elongated member and whereby fine adjustment of the'saw stop member may be effected by rotation of the micrometer screw to cause movement of the saw stop member relative to the channel member.

JOHN B. FREUDENTI-IALER.

REFERENCES CITED.

The following referencesare-ofrecord-in th'e fl-le ofthis patent:

UNITED STATES. PATENTS,

Garrett: -Oct.;:

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