US1981584A - Form shaping device for woodworking machines - Google Patents

Description

1934- J. o. CREEK ET AL FORM SHAPING DEVICE FOR WOODWORKING MACHINES Filed March 24, 1933 Julian/01 5' Juhn U. Urea/1 [z/al[ yMK Er Maud Patented Nov. 20, 1934 FORM SHAIING DEVICE FO woon- I WORKING MACHINES John Oliver Creek and Walter Wood, Hamilton Ontario, Canada 5 Application March 24, 1932, Serial No. 662,481

F 2 Claims.

Our invention relates to improvements in the production of the shaper forms as are used in machine wood working for the production of a plurality of similar pieces of work from a master pattern.

In general practice the wood worker takes the master pattern, clamps it upon a piece of board called the shaper form and then manually cuts away one edge of the shaper form board until it conforms with the outline of the side face of the master pattern positioned thereabove. This is a lengthy and tedious operation as the wood workor has, to be particularly careful to make the edge of the shaper form of the exact formation of the side of the master pattern. When the wood worker has completed this operation, which is done by hand, the shaper form is then, ready for use in reproduction work, and in making the duplicate pieces of work he clamps a roughly formed piece of wood onto the shaper form in lieu of the master pattern and utilizes the formededge of the shaper form as a-guide in milling or shaping the face of the piece of wood in conformity therewith.

The object of our invention is to obviate hand work in forming the side edge of the shaper form board and to do this we have provided a guide member adapted to be used in conjunction with the rotary cutter of a spindle wood shaping machine wherein the face of the master pattern mounted upon the shaper form can be brought to bear against the guide whereby the cutter-head mills away the edge of the shaper form in conformity with theside face of the master pattern.

A still further and particular object of our invention is to provide our guide, which is of stationary vertical cylindrical form, of a height at least equal to the total face depth of the contacting side face of the master pattern, and another object of our invention is to adjustably secure the cylindrical guide upon a'bracket which is adapted to be attached to the table of a wood shaping machine.

Another object of our invention is to furnish a ring member adapted. to be adjustably secured upon the cylindrical-guide for increasing the diameter thereof, which is necessary in certain types of reproduction work as shall be hereinafter explained.

Our invention consists of a guide of the character set forth all as hereinafter more particularly described andillustrated in the accompanying drawing in which: I

Fig. 1 is a perspective view of arotary cutterhead projecting upwardly from the face, of a fragmentary portion of a shaper table in accordance with standard practice, the standard type of guide ring being shown in conjunction therewith.

Fig. 2 is a similar figure to Fig. 1 showing the cutter-head partially lowered throughthe orifice in the table, our guide member being shown positioned thereabove.

Fig. 3 is a perspective view of a shaper form, showing the master pattern clamped thereon, before the edge of the shaper formis cut away to conform with the side face of the master pattern. Fig- 4' is a perspective view of a roughly shaped piece of wood before having its side face shaped to conform with the side face of the master pattern. r

Fig. 5 is a vertical cross'se'ctional view through our cylindrical guidemember showing 'a detachable rin-g positioned on the lower portion thereof for use for certain classes of work, and

Fig. 6 is a side elevational view of the cutterhead as shown in Fig. .1 wherein the blades there-' of are inclined for cutting a sloping face.

Like characters of reference indicate corresponding parts in the different views in the drawing.

The standard type of spindle wood shaping machine comprises a fiat table top 1 upon which the work to be machinedis placed together with a vertical cutter-head 2' projecting upwardly through an orifice 3 in the top, the cutter-head being adjustable in height, that is, it can be fully raised as shown in Fig. 1 or moved downwardly as shown in Figs. 2 and-5. The standard type of machine is also provided with a ring 4 adapted to be contained within the orifice 3 and having an upwardly extending guidetcollar 5 of the same outer face diameter as the diameter of the path.

of rotation of the edgesof the cutter blades 6 carried uponthe head .2. The work to be cut or milled is clamped upona shaper form as illustrated 3 and the shaper form moved across the surface of the table until the knives of the rotating cutter-head engage the work car-' ried thereon. In Fig. 3 we have shown the cut away or formed edge '7 of the shaper form, in the dotted lines, and it will be understood that when such edge 7 is brought to bear against the guide collar 5 that the cutter-head will mill the face of the piece of work into conformity with. the outline of the edge '7.

As explained in thepreamble of our specification, the object of our invention is to provide a means whereby the edge 7 of the shaper form can be-machine cut in conformity with the side face of the master pattern.

To achieve, this object we provide a cylindrical guide. member8 of a height'not less than the height of 1 the cutting face of the milling cutter head and ofthe same diameter as the diameter of the guide .collar 5 andtherefore also of the same diameter 'as the diameter of the cuttingv path of the blades 6, and by the provision of an upwardly extending bracket 9 mount the cylindrical guide 8 above the lowered cutter-head.

the reception of a lock screw 13 which extends through the slot and is threaded into the orifice 14 in the cylinder 8. By, loosening the screw 13 the cylinder can be moved relatively to the bracket through the distance of length of the slot and if j it is desired to secure a further adjustment we furnish a second threaded orifice 15 into which the locking screw '13 can be fitted. As the face'of-the bracket 'i-n contact with the face of the cylinder 8' is curv'edto conform with the ournature of the cylinder face asingle screw 13 will rigidly retain the cylinder in place;

' In using our guide a master'pattern such as indicated at 16 is clamped upon the shaper form board 1'7 in. any suitable manner such as by clamps 18, the clamps being of any suitable type to rigidly hold the master pattern in place against longitudinal movement and also to retain the master pattern against rear movement when pressed against the cylinder 8. The lower end of the cylinder 8 is positioned above the face of the table 1 a slightly greater distance than'the thickness of the board 17 and the cutter-head 2 is moved upwardly to a position just underneath the bottom face of the cylinder 8. The machine isthen started to rotate'the cutter-head and the edge portion 20 of theshaper form board 17 pressed against the rotating knives 6 until the face 21 of the master pattern makes contact with the face of the cylinder "8 and as the board 1'7 is moved to and fro the edge portion 20 will be cut away in conformity with the'face 21 of the master pattern, as shown by the dotted lines in Fig.

3. It will be understood that the top cylinder- 8 is at least as high as the highest point of the face 21 'of the master pattern. When the edge of the shaped form has'been cut the master pattern is removed andthe shaper form is then ready for the reception "of arough cut piece of the materialto be shaped, such as indicated by the numeral 30 in Fig. 4.

The bracket 9 and cylinder 8 are removed from the table and thefiller ring 2 2'also removed;

The spindle '23 carrying the cutter-head is thenmoved to the uppermost position above the face of the table and the cutter-head moved there from. The ring 4 with its guide collar 5 is then inserted into the orifice 3 in lieu of the ring 22 and the cutter-head 2 repositioned upon the spindle above the guide collar 5 as illustrated in'Fig' 1. The machine is then ready for reproduction work, wherein the face of the work clamped upon the shaper form is brought into contact with the cutter-head, and the formed edge '7 of theshaper form into contact with the guide collar 5 y Intheshaping of certain pieces of'work -wherein one .or more of the faces is sloped upwardly and inwardly, as'for example the piece of work 24 illustrated in Fig. 6, in which the side 25 is inclined,we furnisha ring 26 which is adapted to be slid over the cylinder 8 and locked in its adjusted position by a set screw 27threaded therethrough: e

the contour of theform.

to engage the cylinder. The ring is so positioned upon the cylinder that it is engaged bythe inclined face 28 of the master pattern 29- when the edge of the shaper form is being cut. If the ring were not provided, onlythe lower edge of the inclined face of the master pattern would engage the cylinder, and this, of course, would possiblyinjure the master pattern, render the operation hazardous to the wood worker, as well as making it nearly impossible to achieve a true reproduction of the face outline upon the edge of the shaper form. 1

In the cutting of. the pieces of work from the master pattern, the blades 6 are adjusted upon the cutter-head so that they are angularly inclined at thesame inclination as the face 28 of the masterpattern, as shown in Fig. 6, so that the correct face inclination is achieved as well as the correct outline from the formed edge of the shaperform.

From the foregoing description it will be seen that we have provided a simple and yet very useful device by means of which the edges of shaper forms can be machine cut in accordance with a master pattern, and although we have shown our guide 8 of complete cylindrical form'it is to be understood that it is not necessary to have the guide in the form of a complete cylinder as long as there is sufficient face area to give adequate contact when the shaper form is being cut, and therefore we do not limit our invention to the specific construction shown and described but may make such changes and alterations as we may at anytime deem necessary without departing from the spirit of our invention as set forth in the ap pended claims.

What we claim as our invention is:

1. A wood working machine for finishing an irregularly shaped rough piece comprising a table top having an opening therethrough, a stationary guide detachably mounted above said opening, a rotary cutter passing through said opening and extending above the top adjacent the bottom of the guide whereby'sa'id guide and cutter'will cooperate with an irregularly shaped master pattern and a board to produce ashaper form, an auxil iary attachment comprising a guide collar and a cutter thereabove replaceable in said opening upon removal of the'guide and first mentioned cutter, said collar'and cutter of the attachment operable to reproduce a face on said irregularly shaped rough piece from the shaper form.

2. A wood working machine for finishing an irregularly shaped rough piece comprising a flat table'top having anopening therethrough, a substantially cylindrical'guide having its lower edge spaced fromthe table and positioned above said opening, a rotary milling cutter passing through the opening into position adjacent the lower edge of the guide whereby said guide and cutter will cooperate with an irregularly shaped master pattern and" a board to produce a shaper form, an annular guide collar of a height corresponding to the thickness of the board adapted to be posi-' tioned in and extending above said opening upon removal of the cylindrical guide said cutter being adapted to be repositioned with its lower edge adjacent the upper edge of the annular guide whereby said irregularly shaped rough piece carried by the shaper form may be brought-into position adjacent the annular collar and the cutter in its last named position and a face thereof fashioned to

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