US461100A - Casper d - Google Patents

Description

(No Model.)

0. D. WALLACE. DIE FOR MAKING TYPE WRITER TYPE BARS. No. 461,100. Patented Oct. 13,1891.

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C915. Ina 15W w a?" V UNrTnn STATES PATENT OFFICE.

CASPER D. .VALLACE, OF BROOKLYN, NE\V YORK, ASSIGNOR TO CLARENCE W. SEAMANS, ERNEST R. BARRON, AND DANIEL C. ROUNDY, OF SAME PLACE, EXECUTORS OF JAMES DENSMORE, DECEASED.

DIE FOR MAKING TYPE-WRITER TYPE-BARS SPECIFICATION forming part of Letters latent No. 461,100, dated October 13, 1891.

Application filed March 28, 1887. Serial No. 232,723. (No model.)

To all whom it may concern: mon die and punch a, the main tapering Be it known that I, CASPER D. VVALLAOE, body of said blank A; a, a projection exof Brooklyn, Kings county, New York, have tended from the narrow end of said blank A; invented Improvements in Mechanism for (F, a slit or bifurcation in the projection to;

Folding Sheet-Metal Blanks and Producing a a like slit or bifurcation in the wide end 'lherefrom Type'Bars for TypeJVriting Maof said blank A; a a projection on each side chines, of which the following is a specificaof the bifurcation a at the wide end of said tiollblank A; of, another projection on each side The nature of the invention is in the mechof and extended laterally and longitudinally IO anism for making type-bars for type-writing from each inner projection a at the wide end machines out of light sheet metal; and it is of said blank A; a, a circular socket at the illustrated by the accompanying drawings narrow end of the body ct at the,completion of .and the following description thereof. the type-bar, and a7 a type in the socket a of In the drawings, Figure 1 represents a top the completed type-bar from said blank A.

15 view of a sheet-metal blank for a type-bar in In the drawings, also, B represents a die to accordance with the invention; Fig. 2, a perfold slightly the two straight edges of the spective View of abed-plate and die and plunbody a of said blank A; B 2. bed-plate to ger to fold slightly the long straight edges of hold the first die B; b, a shallow longitudinal said blank; Fig. 3, a perspective View of groove in the first die B, slightly narrower 20 another bed-plate and die and plunger to fold than the body a of said blank A; ('2 a key to the long straight body 'of said blank in the fasten and hold the first die B in its bed-plate middle on its longitudinal axis into a trough- B Uta recess in the narrow end of the groove like hollow bar; Fig. i, a sectional View of b of the first die B; C, a plunger to work in the second bed-plate and die and of the inthe groove 1) of the first die B, and c a protu- 2 5 closing case, spiral springs, and holdingberance on the narrow end of the first plunblade; Fig. 5, a perspective view of another ger C to work in the recess b of the groove 1) bed-plate and die and plunger and working of the first die B. lovers to fold the hollow trough-like bar into In the drawings, also, D represents a die in a tubular form and to fold the bifurcated protwo parts to fold the body a of said blank A 0 jection from the narrow end into a circular into a narrow bar with a trough-like hollow 8o socket; Fig. 6, a top view of the third bedlongitudinally through it; D a bed-plate to plate and die and plunger; Fig. 7, a top view hold the two parts of the second die D; (Z, a of said blank after the first folding, after series of screw-bolts to fasten the second die folding the long straight edges slightly; Fig. D to its bed-plate D The screw-bolts pass 3 5 8,a side and sectional view of said blank after through holes larger than the bolt-bodies to 8 5 the second folding, after folding it in the allow the die to beadjusted to position. (1', is middle on its longitudinal axis into a hollow a set-screw extending laterally through each trough-like bar; Fig. 9, a perspective view of end of each shoulder of the second die D to said blank or bar after the third and final adjust the die to position; (Z aspace or open- 40 folding, after folding it into tubular form; ing between the two parts of the second die Fig. 10, a side and sectional View of the tubu- D; E, a round vertical case or tube attached lar type-bar with its type in place; Fig. 11, a to the bottom of the second bed-plate D at perspective and sectional view of the hollow each end of and across the opening d be trough-like bar after only two foldings, after tween the two parts of the second die D; E

5 one folding of the body of said blank and aspiral spring within each case E; E ,aspin- 5 after folding the bifurcated projection into a dle passing through the coil of the spiral circular socket; and Fig. 12, a View of the spring E within each case E IE a cap on holding-blade used with the second die. the bottom of each case E; e, a collar on each In the drawings, also, Arepresents a sheetend of each spindle E and against the spring 50 metal blank, in form desired, made by a com- E each upper one tight on the spindle and I00 each lower one loose and resting on its re-- spective case-cap E 6 a slot through the upper end of each spindle E a a stiff blade on' the two spindles E within the slots 6 to work up and down in the opening (Z between the two parts of the second die D, and e a hollow set-screw up against each loose collar 6 within each case-cap E to regulate the tensions of the springs E and thereby that of the stifi blade a In the drawings, also, G represents two side plates; G a bed-plate on and across the two side plates G; H, a die or pair of dies in a lateral groove in the front part of the bed-plate G to fold the hollow bar a of said blank A into a tubular form; h, a wearing shoulder or r 1 a cam on each end of the axle I to work against the contiguous part of the die H; K, a lever attached to the cam-axle I to work up and down between the side platesG under the bed-plate G K a handle on the outer end of the cam-lever K; L, a plunger in a 1011- gitudinal groove in the rear part of the bedplate G Z, a circular slot vertically through the front end of the plunger L; m, a link pivoted to the rear end of the plunger L; m a forked support attached near the bottom to the bed-frame G directly under the upper link on; M, a vertical lever hinged to said support m and pivoted to the upper link m at the rear'of the bed-frame G G n, a vertical pin in the top of the bed-plate G on each side of the longitudinal groove of the plunger L and in rear of the groove of the die H; M, a like pin in the top of each part of the die H, and N a stiff spring-wire looped around each rear pin 72, wit-h a loose end pressed against the inner side of each front pin m The operation of the invention may be described as follows: The sheet-metal blank A is made by a common die and punch, an old and familiar device, and the term blank in this specification means a fiat thin piece of metal, of any desired form, cut out of a larger sheet of such metal by a common die and punch. Then to' form said blank A into a tubular type-bar the first operation is to lay it on the first die B longitudinally over its groove b, drive the plunger 0 against it, force the body ainto the groove, and thus fold the long straight edges slightly, as shown in Fig. 7. The second operation is to lay said blank A, thus slightly folded, on the second die D longitudinally over the opening d and blade 6 therein, drive the second plunger F against it, force the body a into the opening, and thus fold it into a trough-like hollow bar, as shown in Fig. 8. The function of the blade 6 with the springs E under it, comfirmly and securely in position, and the third hollow bar with its edges slightly folded inwardly on the third bed-plate G between the two parts of the third die H, drive the two parts of said die together, force the body a close int-o the groove h and thus fully fold it into the round or elliptical tubular bar, as shown in Figs. 9 and 10.

In the'last operation at the same time that the two parts of the third die H are driven together drive the third plunger F against the narrow end of the body a, force the bifurcated projection of into the circular slot Z, and thus fold the two parts into the round socket a, as shown in Fig. 9.

- The first and second operations are better done with the aid of a power-press; but the third operation can be done conveniently by hand. With one hand lift the cam-lever K K which will turn the axle I and cams I and thereby drive together the two parts of the third die H, force the body a into the groove 71 andthus fold it into tubular form, and with the other hand at the same time pull forward the vertical lever M, which will drive the third plunger L against the end of the bar a, and thereby force the two parts of the bifurcated projection ct into the circular slot Z and thus fold them into the socket (1. Then reverse these movements, push the vertical lever M back to place, which will draw the third plunger L with it, drop the cam-lelike hollow type-bar, the first operation herein described is dispensed with, and what is herein called the second operation becomes the first, and the third becomes the second, which latter in that case is confined simply to folding the two'parts of the bifurcated projection a of the bodya into the socket a. Simply, in that case, the first die and plunger B C and first operation herein described are not used, and the second die and plunger D F become the first, and the third die and plunger G L, modified to the requirements, become the second, which are all that are needed.

And now, having thus fully described the invention I claim 1. For the manufacture of type-writing-maing resting on springs so as to make a tight vise with the plunger and yet to yield to the greater force of the latter.

3. For the manufacture of type-Writing-machine type-bars, the combination of a die in two parallel parts adapted to move laterally and provided With an elliptical or circular groove longitudinally in the inner edges thereof, half in one and half in the other, a

IO plunger adapted to move in the line of such groove and provided with avertical. circular groove in the working end thereof, cams and mechanism to drive the die parts together to form a blank, and mechanism to press them apart when released.

Brooklyn, New York, March 17, 1887.

CASPER D. XVALLACE. lVitnesses' WILLIAM H. BRIGGS, HARRY W. CoLLoM,

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