US2990861A

US2990861A - Mechanism for beveling planks or the like

Info

Publication number: US2990861A
Authority: US
Inventors: Macks Elmer Fred; Wilbert M Burgett
Original assignee: Marine Dev & Res Inc
Current assignee: Marine Dev & Res Inc; Marine Development & Research Inc
Priority date: 1959-04-16
Filing date: 1959-04-16
Publication date: 1961-07-04
Anticipated expiration: 1978-07-04

Description

July 4,1961 E. F. MACKS ETAL 2,990,861

MECHANISM FOR BEVELING PLANKS OR THE LIKE Filed April 16, 1959 2 Sheets-Sheet 1 10, 19A 3, QL/ i f/5IATZ 0 INVENTOR5 ELMER FRED MACKS WILBERT M. BURGETT L/Mm ATTORNEYS y 1961 E. F. MACKS ETAL 2,990,861

MECHANISM FOR BEVELING PLANKS OR THE LIKE Filed April 16, 1959 2 Sheets-Sheet 2 w cm? II 6/ IO FIG. 5

INVENTORS ELMER FRED MACKS ATTORNEYS United S at s. Pa e F 2,990,861 FOR BEVELING PLANKS OR THE LIKE Elmer Fred Macks and Wilbert M. Bnrgett, Vermilion,

Ohio, assignors to Marine Development & Research, Inc., a corporation of Ohio Filed Apr. 16, 1959, Ser. No. 806,961

a 19 Claims. (Cl. 144-136) Thisyinvention pertains to tooling, and more particu larly to amethod of, and apparatus for, beveling planks, orthe like.

In lap-strake-boat construction, as one example, the planks which. form the strakes have beveled surfaces. These-beveled surfaces are normally spiral-like or what may be referred to as compound curves. The curves are compound both in that a plank for lap-strake-boat construc'tion is normally curvilinear before it is beveled, and in that the angle between the beveled surface and the face of a plank will vary from one end of the plank to the other.

In the past, beveling of curvilinear planks for lap-strake construction has normally been accomplished in one of two ways. The first of these is by a hand technique where the craftsman individually bevels and fits each plank. This results in each boat, or other article using compound beveling, being a custom built object. The second better known technique utilized in production has been to provide a series of jigs. Two jigs are designed and. built for each plank to be beveled for each boat design. Thus, if a boat manufacturer made, as an example, two sizes of lap-strake boats of, say 16 and 20 foot lengths, he would have two or more jigs for each plank of each boat. Thus, this sample manufacturer might have forty or fifty jigs to permit quantity production of boats of only two lengths. Yet, any change of boat designcan result in a complete obsolescence of an entire set of jigs.

This invention overcomes the disadvantages of the discussed and other prior techniques for beveling curvilinear planks through the provision of an adjustable jig. A. bed is provided for holding a plank. First and second adjustable guides are positioned on either side of the plank. The guides are positioned through the use of suitable gauges. A router is moved along the guide rails after they have been positioned. An infinite variation in plank beveling is obtainable with a single jig.

A further advantage is obtained by providing a plurality of gauge blocks of various sizes. A mechanic can set the jig for a given plank by selecting appropriate gauge blocks from the provided group of gauge blocks. Thus, it is not even necessary to provide a set of gauge blocks for a given plank design. It is only necessary to knowwhich of a standard assortment of gauge blocks should he used to compile a set for a given plank.

Accordingly, one of the principal objects of this inven- 2,990,861? Patented .Iuly 4,v 1961 2 gauge block when the adjustable are being located for beveling a given plank.

Still another object of the invention is to provide a novel and improved adjustable jig having two adjustable guides, one of which is adjustable in a single plane, and the other of which is adjustable along a pair of paths, one of which paths is parallel to and the otherof which is transverse to such single plane. Y

A more special object of the invention is to provide a novel and improved jig having a bed and supported guides which are adjustable together, within predetermined limits, to any angle with the horizontal, thereby being posi tionable to suit the comfort'of the operator.

Another more special object of the invention is to provide a novel and improved router for use with an adjustable and tiltable jig, in which first and second rolling contact bearings are provided to follow one of the guides, and a slide bearing is provided to follow the other of the guides.

A still further object of the invention is to provide a novel and improved method of beveling planks for boat construction.

A related object of the invention is to provide a novel and improved method of beveling planks for lap-strakeboat' construction wherein all of such planks are beveled on a single adjustable jig.

I Yet another object of the invention is to provide a novel and improved method of adjusting a jig.

Other objects and a fuller understanding of the invention may be had by referring to the following description and claims, taken in conjunction with the accompanying drawings, in which:

FIGURE 1 is a top plan view of one of the novel and improved adjustable jigs;

FIGURE 2 is a sectional .view as seen from a transverse plane of cross section and on an enlarged scale with respect to FIGURE 1 and showing a router in position on the jig;

FIGURE 3 is a fragmentary top plan view, on an en-' larged scale with respect to FIGURE 1, and as seen from a plane indicated by the line 3--3 of FIGURE 2, of a portion of the jig and a router on that portion;

FIGURE 4 is a sectional view of the device on an enlarged scale with respect to FIGURE 1 and as seen from a transverse plane of cross section showing the use of gauges to position the adjustable jig; and,

I EIGURE 5 is a fragmentary sectional view of a selectable stop used to locate a selected plank on the bed.

tion is to provlde a novel and improved adjustable jig for beveling planks.

A related principal object of this invention is to provide a novel and improved adjustable jig for use in beveling curvilinear planks or the like.

1 Another object of the invention is to provide a novel and improved jig which is adjustable to a predeterminedcontour through the use of gauge blocks.

Another related object of the invention is to'provide a novel and improved adjustable jig wherein the gauge thereafter usedasan indexing guide for a transverse L 1 particular contour.

Referring to the drawings, a jig bed is shown generally at 10 in each figure. A plank 11 is located on the bed 10 on a work station. In the preferred and disclosed arrangement as disclosed in FIGURE 1, the bed 10 and the structure supported thereon are symmetrical about the longitudinal center line of the bed such that each side is. a mirror image of the other. For clarity of illustra tion one-half of the jig will be described in detail with the mirror image parts being designated by a corresponding numeral plus the letter A. Thus, a port plank 11A is shown which is the mirror image of the starboard plank 11. The advantages of this construction will subse quently be described in detail.

The plank is positioned in the selected work station by afixed stop 12 and removableseleoted stop 13. The removable stop 13 is referred to as a selected stop, because it is a particular stop designed to coact with the fixed stop 12 to locate a plank of a predetermined and. One such removable stop is provided for each plank to be beveled. I

- Whenthe jig is being set up for a given plank, an appropriate removable stop-13 is selected from a group f of-assorted of stops and fixed to thebed 10. The: removable stop'1-3 serves as a gauge stop for a given planks" The removable stop 13 has suitable locating dowels 60, FIGURE 5, which are positioned in matching holes formed in the bed 10. The selected removable stop is suitably held in position as by .threading a wing nut 61 ontoa threaded'stud 62. V p

A plurality of clamps 14 are'fixe'd to the bed 10. The c1arn'p's'14 fix the plank 11 in position after the plank has beenlocated by the

stops

12, 13. The clamps '14 have a substantial transverse dimension to permit them to hold any plank having any one of a wide variety of contours. As will be apparent to a mechanic skilled in the art, other suitable manual or powered clamp means may be employed. 7

The bed is preferably supported by front and

rear supports

15, 16 which are mounted'on a base 17. The supports 15, 16 are pivotally connected to the bed 10. The supports 15, 16 are vertically adjustable topermit the bed 10 and the parts connected to the bed to be adjusted to any desired angle with the horizontal. The adjustment for the front support is comparable to the rear support 16, but not shown. This permits the entire jig to be placed in a position which is comfortable for the operator.

Front and rear

flexible guides

19, 20 are provided and supported above. the bed 10. The

guides

19, 20 provide guides for a router support 21. The router support 21 has a slide bearing 22 of nylon, Teflon or other suitable low friction material for facile guide slide movement of the support 21 along the guide 20.

In the preferred and disclosed arrangement a pair of rolling

contact bearings

23, 24 are carried at the front of the router support 21. The bearing 23 may be referred to as a vertical bearing, since it normally receives the major portion of the vertical load'imposed on the front guide 19 by the router assembly. The other bearing 24 may be referred to as a lateral support roller, since it provides lateral positioning of the router support 21 and the remainder of the router assembly. The

bearings

23, 24 are preferably positioned with'their axes normal to one another and in a common plane which is longitudinal of the support 21. The axes of the

bearings

23, 24 are also substantially normal to the axes of the front guide 19 when the device is in operation.

The router assembly has a router motor which includes a housing 25 mounted on the router support 21. A shaft 26, driven by the motor, carries a routing tool 27.-

As will be seen in the drawings, the fiont guide 19 is preferable curved and will normally have an elevation, with respect to the bed 10, which varies from one end to the other. In the preferred and disclosed arrangement, the rear guide 20is straight but may also have a varying elevation along its length with respect to the bed 10. Through a technique which will subsequently be. described in detail, the guides 19, 20'rnay be positioned to provide predetermined guide paths for the router.

When the plank 11 is clamped in position, the router support 21 may be moved along the guide paths to bevel a front edge of the plank 11. Beveling of the front edge 30 forms a beveled surface 31-which is best seen in FIGURES 2 and 3. With one or both of the

guides

19, 20 defining a guide path which is other than parallel with the bed 10, the finished beveled sunface 31 is a surface which may be referred to as a compound curve. By this it is meant that the normally obtuse angle between the beveled surface 31 and face 32-of the plank varies from one end of the plank to the other. Stated another way, the bevel angle varies along the length of the plank. In addition, since the plank is curved (laterally speaking) or curvilinear before beveling as best seen in FIGURE 1, the beveled surface 31 will follow this plank curve.

A plurality of rear clamp rods 35 are connected to the rear guide 20 at spacedintervals. The rear clamp-rods 35- eachproject through one of a series of bores 36 formed transversely through the guide 20. Each of the rear clamp rods 35 has an enlarged partially spherical head 37 which is positioned in one of a series of guide counterbores 38. The heads 37 coact with shoulders 39 in a self-aligning action. Each of the shoulders 39 is formed between one of the bores 36 and the corresponding one of the counter bores 38. The coaction of the heads 37 and the shoulders 39 pulls the guide 20 down against the plurality of rear gauge blocks 40 when the mechanism is tightened.

In the preferred and disclosed arrangement each of the rear clamp rods 35 extends through one of a series of longitudinally extending apertures or openings preferably in the form of slots 41. The slots 41 are formed longitudinally along each of the rear guage blocks 40. Coaction of the surfaces defining the slots 41 and the rear clamp rods 35 provides transverse positioning of the gauge blocks 40. I

Each of the rear clamp rods 35 extend through an aperture 43 in the bed 10. A suitable clamp means is provided to pull down on the rear clamp rods 35 to urge the guide 20 against the gauge blocks 40, and in turnto urge the gauge blocks 40 against the bed 10. In the disclosed arrangement the clamp means takes the form of a plurality of wing'nuts 44, one of which is threaded onto each of the rear clamp bars 35.

A plurality of transversely extending feet 45 may be provided on each of the gauge blocks 40 to give the gauge blocks and the connected rear guide bar 20 transverse stability.

The front guide 19 is positioned vertically by a plurality of front gauge blocks 50. The front gauge blocks 50 are interposed between the front guide 19 and the bed 10. A plurality of transversely extending slot-like apertures 51 are formed in the front portion of the bed 10. The slot apertures 51 receive a plurality of front clamp rods 52 which may, as disclosed, be at least partially formed of wire. Each of the front clamp rods 52 has a head 53 which engages one of a plurality of shoulders 54 in the front guide 19. The shoulders 54 correspond to the shoulders 39.

The front clamp rods 52 are fixed in position to tension the front guide 19 against the front gauge blocks 50 by wing nuts 55. Each of the wing nuts 55 acts against one of a series of bridging spacers 56. The bridging spacers 56 extend longitudinally with respect to the bed and transversely with respect to the slot apertures 51. Each bridging spacer transmits forces from one of the front clamp rods 52 to the bed on either side of each of the slot apertures 51.

The front guide 19 has sufiicient flexibility to assume the curvature of any plank to be beveled. Preferably, the slot apertures 51 are of suflicient size so that the front clamp rods 52 are normal to the bed 10 in any position of jig adjustment. The use of wire as a part of the clamp rod minimizes the slot required to obtain this desired objective and also places less dependency on the self-alignment feature of the head counter bore arrangement.

The front gauge blocks 50, like the rear gauge blocks 40, each has a plurality of feet 57 to give the front guide 19 transverse stability. The front gauge blocks 50 pref erably each has a bar receiving aperture preferably in the form of a longitudinal slot 58. The slots 58 correspond in function to the slots41of the rear gauge blocks 40.

In the preferred and disclosed arrangement the rear guide 20 is disposed along the center line of the bed 10; The rear guide is used both for beveling the starboard plank 11 and the mirror image port plank 11A. This center line, mirror image construction permits each pair of planks to be beveled with only one set of gauge blocks 40 and one rear guide bar 20.

The principal beveling is on the outboard face of each plank. Some inboard, or reverse, beveling is often required. For inboardbeveling the starboard plank 11-is 5 turned over and beveled on the portsid of the jigand the port plank 11A on the starboard side of thejig.

The method of ddjusting the jig When the jig is set up for a given plank such as a plank for a lap-strake-boat, the

guides

19, 20 are positioned in preselected locations to provide guiding'which will permit the attainment of a desired bevel curvature even though the bevel angle varies gradually along the entire length of a plank.

First, sets of both the front gauge blocks 50 and the rear gauge blocks 40 are selected. 'These sets of gauge blocks 40 may either take the form of a plurality of matched gauge blocks made to comprise a particular set, or a predetermined collection of gauge blocks selected from an assortment. It will be seen that with the latter technique it is not even necessary to build a new set of gauge blocks when a boat is redesigned. Rather, one merely determines which blocks of the assortment should be used to make a set for a given new plank.

The rear clamp rods 35 are each passed into a slot 41 of the appropriate one of the rear gauge blocks 40. The clamp rods 35 are then passed through the bed apertures 43 and the wing nuts 44- are threaded into position to draw the rear guide 20 down against the blocks 40. Alternately and preferably, the wing nuts are threaded onto the clamp rods 35 before the gauge blocks are positioned. They are merely tightened after the positioning. With this construction it is only necessary to loosen the Wing nuts to permit changing of sets of gauge blocks. 7 The gauge blocks 40 may be of a uniform height, or they may vary in height to position the guide 20 at any preselected height above the bed 10. In the preferred and disclosed arrangement adjustment of the rear guide 20 is confined to a plane transverse to the bed 10. The front guide 19 is adjusted both in a path paralleling the adjustment plane of the rear guide 20 and in a path transverse to the rear guide plane and the bed 10. The vertical adjustment of the front guide 19 is accomplished by essentially the same technique as is used in providing the vertical adjustment of the rear guide'20.

Suitable gauging is necessary to provide transverse location. In the preferred and disclosed arrangement transverse location is obtained by gauging from a plank fixed mthe work station. Therefore, before the front guide 19 is located, the appropriate removable stop 13 is chosen and positioned. The removable stop is clamped in place,

FIGURE 5, by tightening the wing nut 61.

After the removable stop 13 has been positioned, the i plank 11 is located in its work station by positioning it against stops 12, 13. The clamps 14 are then tightened to hold plank '11 in position. A transverse gauge block 64 is then positioned between plank 11 and one of the gauge blocks 50. The clamp rod 52 for the transversely positioned front gauge block 50 is then tightened down to lock that gauge in the selected transverse position and to locklthe front guide rail 19 against that gauge. This process is then repeated with'each of the front gauge blocks 50 at each gauging station. Normally, the process will be started at one end and the transverse gauge block then. moves sequentially from one gauge block to the next until the gauge block at the opposite end is positioned. 'Similarly and obviously the transverse gauge block 64may be formed to provide spacing between the plank 11 and the front guide 19.

1 One of' the advantages of the invention is that one transverse gauge block 64 may be used for all planks. This gauge block serves to provide a location for the front guide 19 at a uniform distance from the front edge 30 of the plank 11.; Thus, the front guide: 19 assumes a transverse curvature which is identical to the curvature of'the front edge 30 of the plank to be beveled.

Once the jig is set up, one ormore plans of the-selected I size and curvature are positioned sequentially on the bed '6 10. They are sequentially beveled by passing the router along the guides to bevel the front edge 30 of each plank '11. After the desired numbers of a selected size plank have been beveled, the jig is readjusted and the next plank, or series of planks, are sequentially beveled.

With the described invention one jig is all that is required for mass production of an infinite variety of lapstrake-boats. Further, one assortment of gauge blocks and one assortment of removable stops may be provided which will permit redesign of the boats being manu factured without any new tooling being required. All that is needed is a new list of what gauge blocks comprise the new sets. While the invention has been described with a great deal of particularity and detail, it is believed that it essentially comprises an adjustable jig having first and second guides, each of which are adjustable relative to a work bed, and to a method and apparatus of adjusting such guides, as well as a method of using such jig.

Although the invention has been described in its preferred form with a certain degree of particularity, it is understood that the present disclosure of the preferred form has been made only by way of example and that numerous changes in the details of construction and the combination andarrangement of parts may be resorted to without departing from the spirit and the scope of the invention as hereinafter claimed.

What is claimed is: Y

1; A jig comprising a bed, first and second meansto' locate and fix first and second planks respectively on the bed and thereby define first and second work stations, first, second and third guides, means adjustably securing the first guide to the bed between the first and second stations, and other means adjustably securing the second and third guides to the bed on opposite sides of thefirst guide to respectively define compound paths of tool travel and with the first station between the first and second guides and the second station between the first and third guides, said second and third guide each being adjustable to thecurve of the contour of the respective planks to be beveled.

2. -A jig for beveling planks comprising, a bed, meansto locate and fix a plank on the bed and thereby define a1-work station, and first and second spaced adjustable guide means connected to the bed and selectively posi-' tionable on opposite sides'of said station to define a compound path of tool travel along said station, said first guidemeansbeing adjustable to the curve of the contour of a plank to be beveled.

3. A jig for beveling planks comprising, a bed, means to locate and fix a plank onthe bed and thereby define a work station, first and second spaced adjustable guide means connected to the bed and selectively positionable on opposite sides of said station to define a compound path of tool travel along said station, each of said guide means being adjustable toward and away from said bed, and said first guide means being adjustable transversely of the bed.

' 4. The device of claim 1 wherein the bed and each of the mentioned means are supported by a base and tilt-- in position on said portion and thereby define a work station, a straight guide and a curved guide positioned on opposite sides of said station, a first set of gauge blocks interposed between the straight guide rail and the bed top spacing the straight guide from the bed top, straight guide clamping means holding said straight guide and said first set of gauge blocks in position relative to said bed, a second set of gauge blocks, the bed having a plurality of spaced slots formed therein and extending transversely with respect to said portion, and. curved guide clamp means extending through said slots" "7 and fixing said curved guide and said second set ofgauge blocks to the bed. 6. A jig for beveling planks comprising, a work bed having a top including an elongated plank support :portion, clamp means carried by the bed adjacent said portion to hold a plank in position on said portion and thereby define a work station, a straight guide and a curved guide positioned on opposite sides of said station, a first set of gauge blocks interposed between the straight guide rail and the bed top spacing the straight guide from the bed top, straight guide clamping means holding said straight guide and said first set of gauge blocks in position relative to said bed, a second set of gauge blocks, the bed having a plurality of spaced slots formed therein and extending transversely with respect to said portion, curved guide clamp means extending through said slots and fixing said curved guide against said second set of gauge blocks and said gauge blocks against the bed, and said curved guide clamp means including a flexible portion to facilitate adjusting movement of the curved guide.

I 7. A jig for beveling planks comprising, a work bed having a top including an elongated plank support portion, clamp means carried by the bed adjacent said portion to hold a plank in position on said portion and thereby define a work station, a straight guide and a curved guide positioned on opposite sides of said sta tion, a first set of gauge block interposed between the straight guide rail and the bed top and spacing the straight guide from the bed top, straight guide clamping means holding said straight guide and said first set of gauge blocks in position relative to said bed, a second set of gauge blocks each having an aperture, a plurality of flexible strands fixed to said curved guide, each of said strands extending through one of said passages, the bed having a plurality of spaced slots formed therein and extending transversely with respect to said portion, each of said strands extending through one of said slots, said slots having a width substantially greater than the diameter of the strands to facilitate adjustment movement thereof, each of said gauge blocks of the second set at least partially straddling one of said slots, and curved guide clamp means connected to said strands and fixing said curved guide and said second set of gauge blocks to the bed.

a 8. A jig for beveling planks comprising, a work bed having a top including an elongated plank support portion, a plurality of clamps carried by the bed adjacent said portion to hold a plank in position on said portion and thereby define a work station, a straight guide and a curved guide positioned on opposite sides of said station, a first set of gauge blocks interposed between the straight guide and the bed to space the straight guide from the bed top, straight guide clamping means holding said straight guide and said first set of gauge blocks in position relative to said bed, a second'set of gauge blocks each having an aperture, a plurality of flexible strands fixed'to said curved guide, each of said strands extending through one of said apertures, the bed having a plurality of spaced slots formed therein and extending transversely with respect to said portion, each of said strands extending through one of said slots,- each of said gauge'blocks of said second set at least partially straddling one of said slots, and curved guide clamp means connected to said strands and fixing said curved guide and said second set of gauge blocks to the bed.

9. The device of claim wherein the gaugeblocks of each set are of varying length.

10. The device of claim 5 wherein a curvilinear plank is clamped against said portion and wherein the curved guide is a uniform transverse distance from the longitudinal edge of the plank nearest the curved guide.

11. A jig for beveling curvilinear planks comprising a bed having a work face, locators connected to the face of the bed to position a plank thereon and thereby de finea workstation, clamps connected to the work face of the bed for securing a positioned plank thereon, a first straight guide, a first set of gauge blocks disposed in spaced relationship along one side of the station, each of the gauge blocks of the first set being generally normal to the work race of the bed and each having a first end in .abutment with the work face of the bed, each of the first set of gauge blocks having a second end in locating abutment with the first guide, first releasable clamp means connecting the first guide and the first set of gauge blocks to the bed and maintaining the first guide and the first set of gauge blocks in position along said one side of the station, a second guide, a second set of gauge blocks disposed in spaced relationship along the other side of the station, each of the gauge blocks of the second set being generally normal to the work face of the bed and each having a first end in abutment with the work face of the bed, each of the second set of gauge blocks having a second end in locating abutment with the second guide, and second releasable clamp means connecting the second guide and the second set of gauge blocks to the bed and maintaining the second guide and the second set of gauge blocks in position along said other side of the station, said second set of gauge blocks and said second guides being adjustable laterally of the bed when the second clamp means is released to adjust the second guide to the curve of the contour of a plank to be beveled.

12. A jig for beveling curvilinear planks comprising, a bed having a work face, first and second spaced sets of locators connected to the face of the bed to position first and second planks thereon and thereby define first and second spaced work stations, clamps connected to the work face of the bed for securing positioned planks thereon, a first straight guide, a first set of gauge blocks disposed in spaced relationship between said stations, each of the gauge blocks of the first set being disposed generally normal to the work face of the bed and each having a first end in abutment with the work face of the bed, each of the first set of gauge blocks having a second end in locating abutment with the first guide, first releasable clamp means connecting the first guide and the first set of gauge blocks to the bed and maintaining the first guide and the first set of gauge blocks in position between said stations, a second guide, a second set of gauge blocks disposed along a side of the first station and with the first station between the first and second sets of gauge blocks, eachof the gauge blocks of the second set being generally normal to the work face of the bed and each having a first end in abutment with the work face of the bed, each of the second set of gauge blocks having a second end in locating abutment with the second guide, second releasable clamp means connecting the second guide and the second gauge blocks to the bed and maintaining the second guide and the second set of gauge blocks in position along said one side of said first station, said second set of gauge blocks and said second guide being adjustable laterally of the bed when the second clamp means is released to adjust the second guide to the curve of the contour of a plank to be beveled, a third guide, a third set of gauge blocks disposed in spaced relationship along one side-of the second station and positioned with the second station between the first and third guides, each of the gauge blocks of the third set being disposed generally normal to the work face of the bed and each having a first end in abutment with the work face of the bed,each of said third set of gauge blocks having a second end in locating abutment with the third guide, and third releasable clamp means connecting the third guide and the third set of gauge blocks to the bed and maintaining the third guide and the third set of gauge blocks in position along said other side of the station, said third set of gauge blocks and said third guide being adjustable laterally of the bed when the third releasable clamp means is released to adjust the third guide to the curve of the contour of a 76 plankto bebeveled.

13. The device of claim 11 wherein each of the gauge blocks has an opening extending from its first to its second end, and wherein said clamp means comprises a plurality of elongated members each secured at one end to a guide and each disposed in one of said gauge block openings and projecting through the bed, and wherein a nut is threaded on to the lower end of each of said members and in abutment with a lower face of the bed to hold the guides against the gauge blocks.

14. The device of claim 11 wherein each of the gauge blocks includes a plurality of outwardly directed stabilizing feet at its first end.

15. A mechanism for beveling planks comprising, a bed, clamp means to fix a plank to the bed and thereby define a work station, and first and second adjustable guide means selectively positionable on opposite sides of said clamp means to define a compound path of tool travel along said station, and a router, said router having a support selectively positionable against both of said guide means, a slide bearing carried by said support to facilitate guided movement along one of said guide means, and a pair of roller bearings carried by said support and engageable with the other of said guide means, said rollers having axes of rotation normal to one another and to the axis of the said other guide means.

16. A router for use with a jig having spaced guides comprising, a support having spaced slide support areas and a motor mounted therebetween, a slide bearing carried by said support in one of said slide support areas to facilitate guided movement along one of said guides, a pair of roller bearings carried by said support in the other slide support areas and engageable with the other of such guides, said rollers having axes of rotation normal to one another and disposed in a common plane transverse to the support, and a router tool and tool shaft mounted on and driven by the motor.

17. The device of claim 1 wherein each of the guide means include a metal guide rod and at least one of the guide rods is sufliciently flexible to assume the curvature of -a plank to be beveled.

18. The device of claim 1 wherein the second and third guides and the bed are disposed symmetrically on either side of the first guide.

19. The device of claim 1 wherein each of said means securing one of the guides to the bed includes a plurality of gauge blocks and guide clamping means connecting each of said guides to the bed with a plurality of said gauge blocks between each such guide and the bed maintaining each of the guides in predetermined spaced relationship with the bed.

References Cited in the file of this patent UNITED STATES PATENTS 41,034 Vrooman Dec. 22, 1863 485,156 Hoopes Oct. 25, 1892 534,661 Parmelee et al. Feb. 26, 1895 584,854 Crane June 22, 1897 1,099,692 Carroll June 9, 1914 1,476,666 Williams Dec. 4, 1923 1,770,032 Gruber July 8, 1930 2,525,712 Neighbour Oct. 10, 1950 2,635,655 Linstead Apr. 21, 1953 2,752,961 Melgaard July 3. 1956 2,759,773 Wilmer et a1, Aug. 21, 1956