US531241A - Dovetaltlng-machine for preparing edges of parts of electrotype or stereotype - Google Patents

Description

m0 Model.) 2 sneetpsheet 1.

E. G. WILLIAMS. I DOVETAILING'MAGHINE FOR PREPARING ED'GES 0P PARTS OF ELBGTROTYPE 0R STEREOTYPE PLATE .BLOGKS. N ik 531,241. Patented'Dec. 18

(No Model.) 2 Sheets- Sheet 2.

E. o. WILLIAMS. DOVETAILING MACHINE FOR PREPARING EDGES 0F PARTS OF ELEGTROTYP B 0R STEREOTYPE PLATE BLOCKS.

' No. 531,241. Patented Dec. 18, 1 94.

UNITED; STA PATENT OFFICE.

EDWARD o. WILLIAMS,

OF CHICAGO, ILLINOIS.

DOVETAIIING-MACHINE FOR PREPARING EDGESCOF PARTS Of ELECTROTYPE OR STEREOTYBE PLATE BLOCKS.

SPECIFICATION forming part or Letters ma No. 531,241, dated December 18 1894.

Application filed May 29, 1893.

To all whom it may col Learn.-

Be it known that I, EDWARD C. WILLIAMS, 7 of Chicago, Cook county, Illinois, have invented certain'new and useful Improvements in Dovetailing-Machines' for Preparing the Edges of the Parts of Electrotype or Stereotype Plate Blocks, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, and to the letters and figures of reference thereon.

My invention relates to a machine used more particularly for preparing wooden bases for mounting stereotype plates, and its object is to accomplish a saving of labor and timein the manipulation of the machine, and to make the adjustment of the parts therefor positive and not liable to the inaccuracies of eye measurements: substantially as hereinafter more fully described, and as illustrated in the drawings, in which- Figure 1, is a plan view of my invention, showing the corners of the bed-plate nearest the bottom of the sheet broken away. Fig. 2, is a vertical longitudinal section of the same,

taken on dotted lines 2,- 2, Fig.1. Fig. 3,-is a plan view of the gage adjusting devices, with all of the bed-plate except that supporting said devices, broken away. Fig. 4, is a vertical longitudinal sectionof the same, taken on dotted line 4, 4, Fig. 3, looking in the direction indicated by the arrows. Figs. 5'and 6, show, respectively, a side and plan view of the burr used in connection with my invention. Fig. 7, is a detail view of the dove-tailing burr, and Figs. 8 and 9, are detail views showing the construction of the block.

In the drawings A represents the tableframe which supports the devices of my invention, and which consists of four legs, that are connected at their tops by the rectangular frame A, which about its center of width has its end rails connected by a cross-bar (1.. Passing vertically up through a tapped portion of the cross-bar a near its junction with the rear rail is a screw B, and projecting forward from the corners'of the frontend rail of the rectangular frame A are lugs 12, b, to which the lugs c, 0, depending down from the bed-plate O, are pivotally connected by means of a sta tionary shaft (1. By manipulating the screw B the bed-plate may be inclined at an angle of naled.

Serial No. 475,915. (No model.)

a greater or less degree according as desired. Made longitudinally in the bed-plate at about its center of length, and a distance removed from the right hand side edge ofthe bed-plate equal to about one-third the width thereof, is a slot 2, up through which a circular saw D revolves. This saw is secured to the end of a shaft D, which is j'ournaled in one of the side rails ofthe rectangular frame A and crossbar a, and is drivenby' means of a belt 2 from the main shaft; said beltbeing directed downward, around an idle pulley 3, and around a pulley 4, so as to clear other mechanism, and so as to. impart motion to the drive-shaft 5 upon which said pulley 4 is mounted and secured, as shown inthe drawings.

Secured by means of a set-screw 6 to, and depending down from the shaft d are corresponding arms 1'', the ends of which are connected to a suitable spindle 7, on which lat-.

ter a couple of idle sheaves 8 are loosely jour- These pulleys 8, guide the belt 9, which is driven by the pulley 10, on shaft 5, to the sheave 12 on the lower end of the burr spindle 13, and this burr spindle 13, is journaled in the bearings in the bracket E. Its

construction, with reference to the latter, will be explained hereinafter more fully. Suffice it to say that it carries in its upper end a burr F, which passes through a suitable opening in the bed-plate located in longitudinal alignment with the slot e.

The wooden blocks which are to be operated upon by the saw and burr, consist of a main slab 15, which has its end edges secured in, and reinfor'cedby' the transverse strips 16 of the same thickness. The strips 16 are united to the slab by a dove-tail mortise, which,in order to bring the broad surfaces of the slab and strips on the same plane must be made very accurately; the tenons on the end edges of the slab and the grooves in the contiguous meeting edges of the transverse strips. To make the groove the strip '16 is fed longitudinally to and over the saw, so that the kerf made thereby will be in the edge thereof between the broad sides of the same, and then to and over the burr, which entering the kerf made by the saw completes the groove into the shape required. It would be almost impossible for these blocks to be fed by hand so as to obtain satisfactory results, without having some means of guiding them. I have therefore provided a longitudinal fence or guard plate G which is placed alongside and parallel with slot e so as to form a straight longitudinal guide against which the operator keeps one edge ofthe block whilemoving the same over the saw and burr. The slab 15 is fed endwise to the saw so as to provide an initial rabbet in the edge next the side farthest from the guard plate, and then fed to and past the burr which gives the rabbet an under cut shoulder. The slab is then turned so as to bring its opposite broad side next the saw, and an under cut rabbetis made in the other side of said end edge in the same way, thus leaving the dove-tail tenon in relief. Instead of doing this, however, the guard-plate may be adjusted so that the saw and burr would operate in the edge nextthe side bearing against the guard-plate, and thus permit the block to be fed in one position, and the grain of the wood cut in the same direction all the time. This would require the lateral adjustment of the guard-plate in such manner as to bring the edge ofthe said block which it was desired to operate on in proper register with the saw. I accomplish this ad j ustment of the guard-plate by securing it-to the contiguous end of the longitudinally shifting bar g, which is journaled in andguided by the split guide bearings h secured to and arising from the plate G, which rests upon and is secured to the bed-plate, substantially as shown in the drawings. Arising from this plate G, preferably, nearest the end farthest from the saw isapivotal stud I-I upon which is fulcrumed the lever I. The long arm ofthis lever projects toward the front of the machine to within convenient reach of the operator, and terminates in a suitable handle so as to afford him an easy grasp thereon. The short arm of said lever extends to and over the shifting bar 9 and is provided with longitudinal guides 1', i, on its upper surface, between which is placed and adjusted the block J. This block is capable of a slight longitudinal adjustment commensurate with thelength of a longitudinally elongated opening it down through which a set-screw K passes to-secure the same to the short arm of said lever. The block J has connected to its upper surface near its inner end the longitudinal rod 101., the other end of which latter extends through a suitable eye in a lug projecting from the collar M, which is securely mounted upon said shifting bar at a point'nearer the guardplate. The eye through which this bar at passes is slightly greater in diameter than the said rod, which latter is provided with a tudinally so as to move the guard-plate toward or from the slot 6. As stated heretofore there are practically three positions in which it is necessary for the guard-plate to be moved to, namely: first, the position necessary to make the longitudinal central groove in the transverse end strip of the block; second, the position which will enable a rabbet to be made in the end edge ofthe main slab of the a block farthest from the guard-plate; and, third, the position which will enable the saw to make a rabbet in the edge of said block nearest the guard-plate. The position of the lever as shown in Fig. 1, would enable me to place the guard-plate in. the position necessary to make the central groove in the edge of the transverse strips. lever as shown in dotted lines indicated by m in Fig. 3, would enableme to place the guard-plate in such position as to make the rabbet-in the edgeof the main slab farthest removed from said guard-plate; and the position indicated by the dotted lines y in Fig. 3, would place-the gnard-plate in sucha position as to make therabbet in the edge of said slab next said guard-plate. As it would be inconvenient to hold the lever I in any of the positions indicated by hand,I have provided three openings at, 01', M, in the jbed-platainto any one of which I shoot a vertical bolt N, when the said lever is in such position that thesaid bolt registers with any one of said openings. Thisvertical ibolt extends vertically down through a suitable passage made in said lever and in a foot idepending downward from said lever and resting upon the bed-plate, and has its upper end suitably engaged by the short arm of a thumb lever o, the trunnions of which are ijournaled in suitable bearing lugs arising from the neck of the handle, and the longer arm of said thumb lever extends out overthe handle of thelever I and has a spring 7' under it, the tendency of which is to keep said thumb lever in such positionas to insure the bolt shooting into any one of the openings '11, n, 01 when it comes in register therewith. This bolt holds the lever in any one of the three positions it may beplaced in, and leaves the operator free to use his hands in manipulating the work.

I11 order to insure the perfect relative adjustment of the saw D and the burr F, so that when the bed-plate is inclined so that the saw will make buta shallow incision, the said burr will not out too deeply into the electrotype block, I have given to saidburr a slight vertical adjustment. This I accomplish by tapping the squareshank of the burr centrally and longitudinally, and then setting it into thesquare socket in the upper end of the burr spindle 13, ma'dewith reference thereto.

through the longitudinal central opening in The position of the the said spindle to' and into the tapped opening in the shank of the burr. The spindle is provided near its upper end with a circumferentia-l flange which rests in a suitable seat in the upper end of the longitudinally adjustable sleeve R, and it has secured to its lower end a sheave 12. The sleeve R has, preferably, a circumferential flange on or near its lower end, the edges of which are milled so as to afford a suitable hand grasp, and it is screw-threaded a suitable distance up from this flange so as to mesh and engage with the female screw-threaded portion of the opening in the bracket E, up through which said spindle passes. By adjusting this sleeve adjustment the burr is given a slight vertical up or down as desired.

I have shown in Figs. 5 and 6 a construction of the burr, but 'as I lay no particular In a stereotype block dove-tailing machine,

the combination with the cutting devices, of

the bed plate, the guard-plate, bar g, collar M having a lug projecting therefrom which is provided with a suitable rod 0%, lever I, the

short arm of which is provided with guides i, 2', block J adjustable longitudinally between said guides, and having a longitudinally elongated opening therein, and set-screw K, said rod m connecting said collar M, and block J, as set forth.

EDWARD O. WILLIAMS.

Witnesses:

HARRY G. BROWNELL,

FRANK D. THOMASON.

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