US1235970A - Universally-adjustable and folding saw-guide. - Google Patents

Description

L. GUTH.

UNIVERSALLY ADJUSTABLE AND FOLDING SAW GUIDE.

APPLICATION FILED MAY 27. 1916.

1,235,970. Patented Aug. 7, 1917.

2 SHEETS-SHEET 1.

L. GUTH.

UNIVERSALLY ADJUSTABLE AND FOLDING SAW GUIDE.

APPLICATION FILED MAYZI. I916.

Patented Aug. 7, 1917.

2 SHEETS-SHEET 2.

LOUIS GUTI-I, 0F PORTLAND, OREGON.

UNIVERSALLY-AIDJUSTABLE AND FOLDING SAW-GUIDE.

Application filed May 27,1916.

To all whom it may concern:

Be it known that LoUIs GUTH, a citizen able and Folding Saw-Guides, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to devices which may be applied to a piece of wood to be sawed, and which are provided with a saw-guide adjustable to any desired angle or cut.

What constitutes my invention will be hereinafter specified in detail and succinctly set forth in the appended claims.

In the accompanying drawings,

Figure I is a perspective plan view of my device in preferred form of embodiment as applied to a piece of wood to be cut, the handle end of the saw being broken away.

Fig. II is a diagrammatical end view showing the guide flange adjusted to different sides of a strip of wood to be sawed.

Fig. III is a side elevation of the subject matter of Fig. I partially in section, showing the saw guide proper set at right angles to its base plate.

Fig. IV is an end elevation of the device alone as shown in Fig. III.

Referring to the numerals on the drawing, 1 indicates a base plate which is preferably of oblong shape, terminating in a head 2, that may be of any suitable and preferred form as, for example, that of rounded contour clearly indicated in Fig. I.

Pivotally secured to the head 2 and working against its face upon a screw 3 is a swivel-head 4. The swivel-head 4 is preferably of a generally circular shape shown andis provided with peripheral notches 5 with which a spring actuated latch 6 may engage. The notches are placed to correspond in position with certain graduatlons indicated upon the face of the swivel-head.

The graduations in practice are made to the degrees of a circle and may be as many as the range of adjustability of the member 4 demands.

The latch is provided with convenient means of manipulation, for example, a handle 7 and is movable upon a pivot pin 8, within a slot 9 against the resistance of a spring 10 into and out of engagement with the notches 5. The notches are located at Specification of Letters Patent.

Patented Aug. '7, 1917.

Serial No. 100,217.

regular intervals and mark the points of adustment of the swivel-head 4 which are most frequently used. For finer or intermediate adjustments I prefer to provide in the swivel-head a segmental slot 11 concentric to the screw 3 in cooperation with a screw bolt 12 introduced preferably from below through the head 2 into said slot, and provided above with a wing nut 13. For ordinary adjustments the bolt 12 may be loosened sufiiciently to permit its free play in the slot, the latch 6 being relied upon to hold the swivel-head 4 to desired adjustment. WVhen finer or intermediate adjustments are desired, the use of the bolt 12 may be called into requisition.

At its pivoted end the member 4 carries a rock bar 15, mounted in sockets in lugs 16 and 17, and pivotally secured therein as by counter sunk screws 18. The pivotal swing of the bar 15 is adjustable as by engagement with notches 20 in the lug 16 of a latch 21 mounted preferably in a longitudinal recess 19 in the transversely enlarged end of the bar. The latch 21, pivoted at 22 between the side walls of the recess 19, is normally actuated by a spring 23 into engagement with a selected notch 20. The notches 20 are of any number desired and are located at regular intervals apart, which may be indicated by graduations, not illustrated, on the face of the lug 16.

Preferably at or near the middle of the rock bar 15, I provide a swinging arm 24 whose longitudinal axis preferably coincides with that of the screw 3. It is preferably bifurcated at its end adjacent to bar 15 which it straddles, and to which it is pivotally secured. by a pin 25. The arm 24 is yieldingly urged toward parallel relationship with the bar 15, by suitable means such, for example, as a tensile spring 26 operatively interposed between its depending leg 27 and the opposing face of the lug 17.

The free end of the arm 24 carries a pivoted crank shaft 28, which, extending through the arm 24, is fastened, as by an .arm 29, to one member 30 of a saw-guide proper, which is preferably disk shaped as clearly shown in Figs. I and IV. Upon a bushing 31 pivotally-carried by or secured to the member 30 is revolubly mounted a disk roller 32, and through the bushing about a stud bolt 33 projects a coiled spring 34. A disk 35 corresponding to the member 30 is secured, as by a wing nut 36, to the threaded end of the stud bolt 33 against the resistance of the spring 34. The members 30 and 35 and the intermediate roller 32 constitute a guide proper to an ordinary hand saw 39 whose thickness is enough less than that of the roller 32 to permit only of its free reciprocatory movement between the members 30 and 35. By aid of the spring 34, the disk 35 may be, by the mere loosening of the nut 36, made to shift its position on the stud bolt 33 to facilitate the introduction of the saw 39 into place.

The crank shaft 28 is characterized by a crank arm 40 which terminates in a wrist pin 41 pivoted to one end of a controlling bar 42 whose other end is pivoted as indicated at 43 to a lug 45 projecting from the rock. bar 15. The effect of the movement of the arm 24 under impulse of its spring 26 is to hold the roller 32 of saw guide proper against the back of the saw 39 for the purpose of steadying the action of the saw and preventing it from leaving the saw cut at any time. The bar 42, acting upon the crank shaft 28 controls the action of the saw guide proper so as to impart to it the movement required of it in properly following the saw.

In operation the base plate having been properly adjusted against a straight edge of a strip of wood indicated by the numeral 47, the swivel-head 4 and rock bar 15 are adjusted, respectively, to desired angles and the saw 39, inserted between the guide members 30 and 35, follows the direction of cut imparted by them.

The saw 39 may work horizontally or vertically on bench or on horses, and to adapt it equally to all uses I prefer to provide upon the bottom of the base plate 1 a guide rail 48 transversely movable in determined parallel relationship longitudinally to the axis of the plate 1. To that end, I prefer to provide transverse parallel slots 49 in the plate 1 through which, with snug slip fitment, screws 50 enter the rail 48 and secure it snugly but slidingly against the bottom face of the plate 1. r

In Fig. II the adjustability of the rail 48 is shown by contrast of positions. The rail 48 and wood to be sawed are shown in relative positions in full lines, and in transposed positions in construction lines wherein for distinction the wood is indicated in the respective positions by the numerals 54 and '55. To facilitate adjustment of the rail 48 it is preferably made of a strip of angle iron or other metal. The wood as indicated by 55 is shown as applied against the rail 48 below that portion of it that slides against the bottom of the plate 1.

It should be added by way of observation that the lugs 16 and 17 are shown as integral parts of the swivel-head 4. Such illus- .tration is diagrammatical only, since it is obvious that one of the lugs must be made movable in order to admit of the introduction between them into sockets in the rock bar 15. This however is a mere structural detail to which it is not my purpose in any wise to restrict myself.

Again, the means for adjustably securing the disk 35 in cooperative relationship to the disk 30 is shown as a stud bolt 33 and a wing nut 36 threaded thereto. For this a countersunk screw passing through the disk 35 and threaded through the disk 30 into the arm 29 is an obvious substitute and for some purposes may be preferable.

In cutting rafters, or the like for example, my device may be used to advantage by setting the base plate 1 directly uponone framing member and setting the complementary framing member in place against the flush face of the disk 35 in order to determine, immediately, the required angle of adjustment of the two framing members. This operation may be effected by use of the clevice as shown, but the wing nut 36, by reason of its projection beyond the face of the disk 35 might be objected to for this particular use although preferable for other uses. The substitution of an ordinary countersunk screw for its equivalent bolt and wing nut is a simple and obvious mechanical variation which does not appear to require illustration.

When the device is not in use the swivelhead 4 having been adjusted to the medial position on the head 2 the arm 24 with the bar 42 and disks 30 and 35 mounted on the rockbar 15 may be turned back against the face of the swivel-head, and in that manner the device may be folded into such small compact compass as will permit of its being carried for example, in the pocket.

What I claim is:

1. A miterbox comprising a base plate, a swivel-head adjustable thereon, a rock shaft adjustable upon the swivel-head, a spring actuated arm pivotally mounted on the rock shaft adapted to swing longitudinally of said rock shaft, and a saw guide on said arm adapted to bear lightly. upon the back of the saw.

2. A miter box comprising a base plate, a swivel-head adjustable thereon, a rock-bar on the swivel-head, a spring actuated'arin fastened at one end to the rock-bar'so as to swing longitudinally thereon, a controlling bar pivoted to the rock-bar so as to'swing longitudinally thereon, and means movably uniting the ends of the arm and the controlling bar whereby a saw-guide proper, carried by said means may be actuated to follow a saw to its work.

3. A miter box comprising a base'plate, a swivel-head. adjustable thereon, an adjustable rock-bar on the swivel-head, an arm bifurcated at one end to straddle the rockbar and pivotally fastened to the rock-bar near its bifurcated end, a spring disposed about the rock-bar to engage one lug of said bifurcated end and thereby yieldingly to actuate said arm, and a saw-guide proper on the free end of said arm.

I. A device for guiding saws when cutting miters and the like, comprising a base; a guide rail mounted upon said base and transversely slidable thereon; a head pivotally mounted upon said base and adjustably secured thereon; a rock shaft mounted within said head substantially transversely of said base and adjustably secured in said head; an arm pivoted to said rock shaft and adapted to swing longitudinally thereof; a controlling bar pivoted to said rock shaft adjacent said arm and substantially parallel thereto; a lever pivotally mounted in the ends of said arm and said controlling bar a saw guide mounted upon said lever and ad justed to bear upon the back of the saw; and a spring adapted to operate said arm for the purpose of causing said guide to follow the saw and to steady the same.

5. In a device for guiding saws when cutting miters and the like, a base; a blade adjustably secured to said base to form therewith a square or guide for the material being cut; a pair of substantially parallel arms; a saw guide pivotally mounted upon the ends of said arms; means to mount said arms upon said base so that said arms may be simultaneously rotated upon said base, swing longitudinally of said base, and swing transversely of said base; means to adjust and secure said arms-rotatably upon said base; means to adjust and secure said arms longitudinally upon said base; and means to cause said arms to swing transversely of said base for the purpose of following the saw durin its out.

6. n a saw guiding device having a base; means for applying said base to the material to be cut, a saw guide, means for rotatably adjusting and securing said saw guide relatively to said base, and means for swinging and adjustably securing said saw guide longitudinally relatively to said base; a pair of substantially parallel arms pivotally mounted upon said last mentioned means and pivotally attached to said saw guide; and means whereby said arms are operated to cause said saw uide to follow the saw in its work.

7 n a device for guiding saws when cutting miters and the like, a base adapted to receive the material to be cut; a saw guide adapted to receive and guide the saw; means to set and secure said saw guide in any desired angular relation to said base; and means to swing said saw guide transversely of said base while maintaining said angular relation with said base, into a position to one side of and below said base for the purpose of following and guiding the sawafter the saw has entirely entered the Work.

8. In a device for guiding saws applicable to the material to be sawed, and adapted to be set to guide the saw at any desired angle relatively to said material; a saw guide adapted to receive and guide the saw; and means to cause said saw guide to follow the saw in its Work and to swing clear of said material in so following said saw.

In testimony whereof, I have hereunto set my hand in the presence of two subscribing witnesses.

LOUIS GUTH. Witnesses:

HOWARD 0. ROGERS, MABEL NEVILLE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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