US 2676624 A
Description (OCR text may contain errors)
April 27, 1954 A. c. cslczlvn-:Ny 576,624V
GUIDE` CARRIAGEFOR POWER-DRIVEN HAND TOOLS Filed July 28, 1951 F15 2 H15 ATTORNEY.
Patented Apr. 27, 1954 UNITED STATES PATENT OFFICE GUIDE CARRIAGE FOR POWER-DRIVEN HAND TOOLS 9 Claims.
The present invention relates to a tool guide, and pertains more particularly to a guide carriage for a power driven hand tool. A
In present day woodworking practice, such as carpentry, cabinet making and pattern making, many of the older type hand tools such as, for example, saws, planes and Sanders, have been supplemented, and in some cases almost supplanted by electrically driven counterparts.
For general use these hand held power tools require no accurate guiding beyond that which a skilled operator is capable of giving, but at times it is desirable to be able accurately to guide such tool from an established edge of a work piece upon which the tool is to be used.
The present invention contemplates the provision of an improved guide carriage for a power driven hand tool. It is also an object of the invention to provide a roller supported guide for hand tools wherein supporting rollers are mounted on portions of an adjustable guide element.
In accordance with one feature of the invention, there is provided a frame adapted to receive and retain the power tool to be guided, the frame having a supporting roller mounted 'at each end thereof upon shafts which comprise portions of a laterally extending, adjustable guide :element adapted to engage an edge of a work piece for guiding the tool supported in the frame 0 along a path a predetermined distance from, and parallel to said edge.
A device embodying the invention is illustrated in the accompanying drawings, wherein:
Fig. 1 is a perspective View of a tool guiding device embodying the invention as it would appear in operative position on a board, the position of a power driven hand saw when mounted in the device being shown in broken lines, asis also an alternately adjusted position of a guide Fig. 5 is an enlarged fragmentary exploded perspective View of a front end portion of a frame corner portion, the transverse front frame member being disconnectedY from the side angle member.
Referring to the details of theaccompanying Lli) . drawings,l the rectangular frame A has parallel longitudinal side members i0 and il of angle metal secured in laterally spaced relation by U- shaped front and rear transverse frame members l2 and i3 respectively. The side frame members l0 and H are mounted with lower flanges i4 thereof extending inwardly into the frame A. The front portion of each bottom flange lll is severed from the vertical side flange I5 of its angle member (Figs. 1, 2 and 5) and is bent first upwardly at right angles at Il (Figs. 2 and 5) and then rearwardly at I8 to form a hook-shaped, reversely bent portion i9. This reversely bent portion i9 is adapted to receive therebeneath, a portion of the tool to be mounted in the frame A, such as the upwardly bent forward end of a skid plate 20 of a power driven hand saw B. The side frame members lll and il are spaced apart to receive the skid plate 2i! therebetween so as to support the skid plate on the bottom flanges I4 of the angle metal side members i0 and Il. The distance between the hook-shaped retaining portions i9 and the rear U-shaped end members i3 is such as to receive the skid plate 20 closely therein.
A pair of supporting rollers 2l and 22 are mounted within end recesses in the frame A provided by the U-shaped end members i2 and i3. The rollers are mounted to rotate freely co-axially of parallel rod portions 23 and 24 of a laterally extending guide frame C. The parallel rod portions 23 and 24 of the guide frame C are inserted through aligned pairs of holes 25 in the sides of the recessed front and rear portions, respectively, of the frame A. The rod portions 23 and 24 are connected together by a downwardly and inwardly bent guide shoe portion 2S. The shoe portion 26 is continuous with the rods 23 and 24, and is disposed at right angles thereto. The guide shoe portion 26 is adapted to ride along the edge of a work piece, such as a board D, to guide a tool in the frame A along a path secured to the frame A to provide hollow axles for supporting the rollers 2! and 22 when the guide frame C is removed from the frame A.
For holding the rod portions 23 and 24 in axially adjusted position, a pair of clamp assemblies 28 and 29 are provied at the front and rear ends, respectively, of the frame A. Each of these clamp assemblies, as 'cest shown in Fig. 3, comprises a plate portion Se xedly secured by rivets Si, 3i to a side of the frame side rnernher lil. An internally threaded bushing 32 is provided on the cuter end of the plate 36. The outer end portion or the plate Se is reduced in width at Sila to slightly less than one-half the width of the vertical flange of the angle member lil upon which it is mounted.
A swiveled clamping plate 33 is pivotally mounted, by means of a rivet Sri, on the side of the plate it alcove the reduced forward portion Sta of the plate 3G. A bushing 35 is welded to the outer end of the plate 3S to receive the shank of a thumb screw Si' therein. The lower portion of the thumb screw shank is threaded, and is screwed into the internally threaded 'bushing 32. Notches Sii and are provided in the plates Sil and respectively, to receive the rod portions 23 and therein. Loosening the thumb Ascrew Si frees the rod portion 23 and El?. for
movement to axially adjusted position so as to locate the guide shoe 2e a required distance from the side or the fra-:ne A. Screwing down the thumb screws 3i draws the pivoted plates 33 toward the plates and thereby clamps the rod portions 23 and 2'?, in adjusted position.
In using the device, it is simply necessary to insert the power tool B in the :trarne A as shown in Fig. 1. This is accomplished by tilting the forward end of the power tool downwardly to introduce the up-curved forward end of the skid plate Eil or" the power tool beneath the reversely bent forward portions is or" the lower nanges li of the side frame rnernhers le and i I.
Upon lowering the rear end of the tool to the position shown in Figs. l and 2, the upturned forward end of the skid plate Ztl is engaged he neath the reversely leent portions is of the lower flanges it to clamp the tool to the frame.
Thel rollers 2l and 22 are mounted at a height to support the frame A. slightly clear of the work piece so that the guide frame with the tool supported therein is free to roll along the work piece D. By adjusting the guide C so that the shoe portion 2@ is at desired distance from the plane of the cutting blade lc of the tool B,
and then securing the guide frameC in such ad- U justed position by tightening the thumb screws 3l', the frame will guide the blade along a path at a predetermined distance from, and parallel to, the edge of the work piece D.
For locking the frame A to the tool B in the event that it should he desired to make several cuts in succession without removing the tool B from the carriage frame A, a thumb screw 4l (Fig. 4) is screwed into an inwardly and dov/nwardl-y sloping, threaded hole provided axially through a lug t2 welded to a side of the frame member li near its rear end. By screwing the thumb screw e! inwardly and downwardly to have its inner end hear on the rear end of the skid plate 2Q of the power tool B (Fig. 2) the tool will he rrnly clamped in the :frame A.
While l have illustrated described a preferred embodiment of the present invention, it will he understood, however, that various changes and mo'diilcations may he made in the details thereof without departing from the spirit and scope of the. invention as set forth in the appended claims.
Having thus described the inventioitwhat I' pair i claim as new and desire to protect by Letters Patent is as follows:
l. fin accessory guide carriage for a portable power driven hand tool having a rotary cutting element adjustahly mounted on a skid plate, said carriage comprising a frame, a marginal seat formed therein to receive opposite edges of the skid plate therein, said frame having an opening to receive the cutting element of the tool for free rotation with the tool mounted in said seat, means for releasalcly securing the skid plate in the seat, support means mounted on said frame tor transverse adjustment on said carriage trarne, a guide on said support means disposed to engage an edge ci a work piece upon which said frame is mounted, and a supporting roller rotatably mounted on said support means in position to provide rolling support for the carriage having a tool portieri mounted thereon.
2. An accessory guide carriage for a portable power driven tool having a rotary cutting element adjust'ably mounted on a sind plate, said carriage comprising a trarne, a marginal seat formed therein to receive opposite edges of the skid plate therein, said iframe having an opening o receive the cutting element ci the tool for ree otation with the tool mounted in said seat, neans, for releas ily securing the skid plate in the scat, a pair of parallel support elements mounted for transverse adjustment on said trarne, means for retaining said support elements in adjusted position, a guide shoe on said support elements disposed to engage an edge of a work piece upon which said trarne is mounted, and a oi carriage supporting rollers rotatably mounted one on each of said support elements, said rollers 1oeing positioned to provide rolling support for said carriage with the tool skid plate mounted in said seat.
3. An accessory guide carriage for a portable power driven hand tool having a rotary cutting element adjustaol-y mounted on a skid plate, said carriage comprising a traine, a marginal seat formed therein to receive opposite edges of the skid plate therein, frame having an opening to receive the cutting element of the tool for free rotation with the tool mounted in said seat, means for releasa'cly securing the skid plate in the seat, support means mounted for transverse adjustment on said carriage frame, a guide shoe on said support means disposed to engage a side of a work piece upon which said frame is mounted, a supporting roller rotatably mounted on said support means, and a clamp for securing the support means in transversely adjusted position on the frame.
4. An arrangement according to claim 3 wherein the-support means comprises a'rod slidahly inserted in aligned holes in opposite sides of said frame, said clamp comprising a first clamp portion mounted on the frame on one side of a hole for said support rod, a second clamp portion pivotally mounted on said frame on a diametrically opposite side of said hole from said irst clamp portion, and means mounted to draw the pivotally mounted second elarnp portion toward the rst clamp portion. to grip the rod in adjusted position therebetween.
5. A guide carriage for a power driven hand tool, said carriage comprising a rectangular` frame having spaced apart side portions and spaced Vapart iront and rear portions arranged to enclose an opening to receive a tool element therein, recessed means in said carriage frame forreceivling a marginal edge portion `oi"l the tool element, a rod portion mounted transversely of said carriage frame endwise beyond the tool receiving opening therein, a roller journaled in carriage supporting position on said transversely extending rod portion, means for axially adjusting the rod portion in said roller and in said carriage frame, and a guide portion on said rod portion for adjustment therewith, said guide portion being positioned for guiding engagement with a side of a work piece upon which said carriage frame is adapted to be mounted for rolling support by said roller.
6. A guiding device for a power driven hand tool having a skid plate with up-turned forward portion, said device comprising a carriage frame having an opening therein formed to receive and to support a skid plate of a power tool therein, means for receiving the up-turned forward end of the skid plate of a power driven hand tool inserted in said frame to retain said skid plate against displacement, a guide member mounted transversely of and extending laterally from said frame, a roller journaled in frame supporting position on a transversely disposed portion of said guide member within said frame, means for adjusting said guide member transversely of said frame, and an element on said guide member disposed laterally beyond said frame in adjusted position to engage a marginal edge of a worl: piece when said frame is supported on such worn piece by said roller.
7. An accessory guide carriage for a portable power driven hand tool having a rotary cutting element adjustably mounted on a skid plate, said carriage comprising a frame, a marginal seat formed therein to receive opposite edges of the skid plate therein, said frame having an opening to receive the cutting element of the tool for iree rotation with the tool mounted in said seat, means for releasably Securing the skid plate in the seat, a guide member mounted to extend laterally from said frame, a roller journaled in frame supporting position on said guide member, means for adjusting said guide member transversely of said frame, and a guide shoe mounted on a laterally extending portion of said guide member and positioned to engage a marginal edge of a work piece when said frame is supported thereon by said roller.
8. A guide for a, power driven hand tool comprising a frame, said frame comprising a pair of parallel side members of right angle cross sectional shape mounted with a flange of each thereof disposed on the lower side and facing inwardly, an end portion of one of said lower flanges being bent reversely upon itself, to form a tool retaining recess, end members connecting said side members to form a tool receiving enclosure, a pair of rods adapted to be mounted transversely of the front and rear ends respectively of said frame; a pair of rollers mounted for rotation one on each of said transversely extending rod portions between said frame side members, said rollers extending below said frame to provide rolling support therefor, and a laterally adjustable guide portion mounted on said rod portions laterally beyond said frame, said guide portion extending below the level of the bottoms of said rollers to engage a marginal edge of a work piece upon which said frame is supported to guide a tool in said frame along a path disposed a predetermined distance from said marginal edge.
9. A guide carriage for a power driven hand tool; said carriage comprising a frame adapted to mount a power tool thereon, a pair of open end hollow axles mounted to extend transversely of said frame endwise beyond a tool mounted thereon, a roller rotatably mounted on each axle to provide rolling support for said carriage with a power tool mounted thereon, a guide support rod telescopically inserted in the bore of each hollow axle to extend laterally beyond said frame, means for axially adjusting said rod portions in said hollow axles, means for clamping said rods in axially adjusted position in said axles, and a guide portion mounted on said rod portions for adjustment therewith, said guide portion extending below said carriage frame in position to engage a marginal edge of a work piece upon which said carriage frame is adapted to be mounted for rolling support by said rollers.
References Cited in the file of this patent UNITED STATES PATENTS Number Name Date Re. 17,087 Billingsley Sept. 25, 1928 1,206,461 Nickelson Nov. 28, 1916 1,377,961 Drabenstott May 10, 1921 1,706,115 Hannah Mar. 19, 1929 1,885,087 De Witt Oct. 25, 1932 2,519,526 Wilber Aug. 22, 1950 2,589,554 Killian Mar. 18, 1952