US1511094A - Low-quad-operating mechanism for typographic molds - Google Patents

Description

Oct. 7 1924. 1,513,094

F. H. PIERPONT LOW QUAD OPERATING MECHANISM FOR TYPOGRAPHIC MOLDS Filed Feb. 8 1922 r 2 Sheets-Sheet. 1

I'NVENTOR.

b 11 an film a-? 2f% HIS ATTORNEY? Oct 7, 1924. 1,511,094

F. H. PIERPONT LOW QUAD OPERATING MECHANISM FOR TYPOGRAPHIC MOLDS Filed Feb. 3, 1922 2 Sheets-Sheet 2 "fl/5 ATTORNEY.

Patented Oct. 7, 1924,

UNITED STATES PATENT OFFICE.

FRANK HINMAN PIERPONT, O1? SALFORDS, HOBLEY, ENGLAND, ASSIGNOR TO LANS- TON MONOTYPE MACHINE COIiIPANY, OF PHILADELPHIA, PENNSYLVANIA, A

CORPORATION OF VIRGINIA.

LOW-Q'UAD-OPER-ATING MECHANISM FOR TYPOGRAPI-IIC MOLIDS.

Application filed February 8, 1922.

To all whom it may concern:

Be it known that I, FRANK HINMAN PIER- roN'r, a citizen of the United States of America, residing at S-alfords, Horley, in the county of Surrey, England, have invented certain new and useful Improvements in Low-Quad- Operating Mechanisms for Typographic Molds; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, and to the characters of reference marked thereon.

This invention relates to type casting or type casting and composing machines and particularly to such machines equipped with low quad molds and operating mechanism therefor, in which the mold is provided with a split blade comprising an upper or cutoff blade or section and a lower, main blade or section, so that such mold is capable of producing normal or full-height type bodies and also low quads or spaces short of full height.

The mold blade operating mechanism in commercial machines of this kind is usually controlled by mechanism operatively connected with the matrix clamping mechanism of the machine, the relativemovements of the main and supplemental blades to produce short type bodies being brought about by the presentation over the mold of suitably shaped matrices which produce a variation in the travel of the matrix clamping mechanism as described for example in United StatesLettersPatentNo.828,450,No.1,061,559 and No. 1,198,420. In these patents the matrix for operating the low quad mechanism is of such form as to lack the deep conehole or cavity present in matrices for full type high bodies. In certain constructions, as for example, those shown in the second and third patents above mentioned, the main and cut-off blades are not coupled together but are moved by separate or independent mechanism and the pressure acting to hold the main and cut-off blades back to dimension the mold for full-height or normal type bodies is different from that which acts on the main blade when it alone is moved back Serial No. 535,016.

to dimension the mold for low type bodies, the cut-off blade being meanwhile retained in its forward position to close the top of the mold cavity.

Then full height bodies are being produced, both blades are moved back to dimension the mold by their respective operating mechanisms and as in this position the rear end of the cut-off blade of the mold butts against a shoulder or olfset on the main blade, as shown, for example, in the first patent above mentioned, the force acting to hold. the diminishing blades in open, dimensioning position is the combined force exerted by the two operating mechanisms.

When low quads or spaces are being cast, the cut-off blade is held forward and the main blade forced back by its operating mechanism to dimension the mold, so that the force acting on the dimensioning blade is only that exerted by its own operating mechanism.

Under these circumstances there is a tendency for the mold to be setwise dimensioned slightly less for lowbodies than for high bodies of the same set dimension. It will be understood that the mold blade dimensioning pressure acts against an abutment backed by a plurality of wedges and not against an absolutely unyielding buffer: the difference in pressure above referred to has the effect, therefore, to produce under commercial operating conditions variations in the set dimensions of high and low bodies and these variations, though extremely ininute in. any single instance, have a tendency to produce measurable variations in the relative lengths of lines of type and thus interfere with the production of properly justified matter.

The present invention has for its principal object to provide a construction including an equalizing device or mechanism by which the force or pressure acting on the mold blade to dimension the mold is the same whether high or low type bodies are being produced.

Referring to the accompanying drawldig. 1 is a side elevation showing the present invention applied to or embodied in a mold and a matrix centering and clamping mechanism of a well known form of type casting and composing machine.

Fig. 2 is a plan view of the mold and the equalizing mechanism of the present invention.

:Fig. 3 is an end elevation of the mechanism of Fig. 1 showing the parts in po sition for dimensioning the mold for producing low quads or spaces.

Fig. l is'an elevation of part of the mechanism shown in Fig. 3, the parts being in position for dimensioning the mold for full height type bodies, and p Figs. 5 and 6 are plan views of a modified construction of the equalizing mechanism of the present ilwel'lti'oii.

The invention will be described herein as applied to mold dimensioning mechanism of the kind shown and described in United. States Letters Patent 1,198,420, above mentioned, and in connection. with a type-casting and composing machine such as is well known as manufactured by Lanston Monotyp'e Machine Company and is generally shown and described in United. States Letter's Patent 625,998. It is therefore deemed sufficient for the understanding of the present invention to designate the parts of the mechanisms of the earlier inventions most intimately connected with or cooperating with the mechanism of the present invention; for example, the mold A; the matrix case B; the eros's head C to which the matrix case and its supporting frame are coupledythe matrix case lever D; the matrix centering pin E; the main actuating or centering pin lever F, coupled by a link F with the matrix case lever D, and by a head E and springE with the centering pin E; the rod or slide G and its operating cam lever G and spring G reciprocating the main mold blade H against a variably positioned step, all these parts being substantially as described in United States Letters Patent 625,998. As to parts shown in United States Letters Patent 1,193,420, men tion may be made of the lever K for operating the cut-off or supplemental blade H; said lever K being pivotally connected at one end to the centering pin lever F and being forced down by said lever F through the spring coupling L; the interponent M carried by the lever K so as to be capable vof horizontal movement on its pivotal connection at M with the lever K, and being normally held in one horizontal position by the spring M?; the projection N on the head N carriedby the centering pin E to control the position of the interponent M in a well known manner so as to operate one or the other of the two power actuated members 0, O; the lever P acted upon by the members 0, O and pivoted to the mold A to operate the upper or out--off mold blade H.

As hereinbefore stated, full height type matrices have cavities or cone-holes in their upper ends for the reception of the centering pin E and when in connection with the patented mechanism referred to such a matrix is presented under the centering pin the latter travels down to its full extent and therefore the projection N does not operate the interponent if; so the latter is maintained by its spring M in a position over the member or actuator 0 (Fig. 4). As the arm K descends pressure is applied to the actuator O and operates the cutoff blade operating lever P to withdraw the cutoff blade H until the rear end of the latter engages a shoulder on the main blade H which has been retracted by the cam operated lever G acting on the power actuated member or rod Gr-throngh the spring WVhen both blades are thus retracted to dimension the mold the force acting to hold them retracted while a full height type is being cast is the force exerted by the rod G added tothat exerted by the lever P.

The low quad or space matrices, on the other.

hand, have no cavity or bone hole to receive the centering pin so that. when such a matriX is presented under the pin E, the travel of the latter is interruptedand the projection N acts .on the interponent M to position. it over the member or actuator 0. TV hen the lever F descends, the actuator 0 acts on the lever P to move the cut-off blade H forward and retain it in its forward position, the main blade H is retracted, as in the case for full height type bodies, but is maintained in its retracted positien only by the force ekerted by the rod Ch Thus it will be seen that the force exerted in dimensioning the mold differs as between high and low type bodies of the. same setwise dimension; this results in sli htly dif ferent type dimension, as previously eX- plained, and tends toward inaccuracies in justification.

The present invention contemplates a con struction comprising an equalizing mechanism whereby not only in making type high bodies including t-ype-shonlclerhigl1 bodies but also in making low bodies, both the force exerted through the rod G and that exerted through the lever P act to hold the blades retracted. In the latter case, after the cut-elf blade has been positioned to close the upper portion of the mold, the force exerted by its operating mechanism acts through said equalizing mechanism to add itself to the force exerted by the main blade operating mechanism th hold said main blade retracted; thus in either low or high body casting the forces acting upon the main blade to dimension the mold. are the same. i

The above mentioned equalizing mechanism will now be described. The lever P is pivotally supported on a pressure equalizing lever Q at R, and the lever Q is pivoted at S on the mold body in the construction shown in Figs. 1 to 4 inclusive. One endof the lever P is embraced by the lower ends of the actuators O, 0 while the other end enters an opening in the cut-off blade. The lever P has an opening T through which the pivot S of the lever Q passes, the opening T being large so that the lever P can act without being interfered with by the pivot S. The free end U of the lever Q, rests in the path of movement of the main blade operating rod G and the latter is connected to the main mold blade by the pin J (Fig. 2).

hen the blades are moved forward to eject a type body from the casting cavity of the mold the forward end G of the rod G is a little distance away from the free end U of the lever Q. The lever Q has a lat-- erally extending shelf Q to engage as shown in Fig. 5 with a hump P on the lever P.

Then a full height type body is to be cast, the centering pin E travels its full or nor- ,mal distance and the interponent M is in position over the actuator O as shown in Fig. 4;. As the matrix case lever F descends, the lever K is forced down carrying with it the interponent M and causing the actuator O to turn on its pivot V and operate the lever P. In this case the lever P turns on its pivot R until its hump P strikes the shelf Q of the lever Q; or the construction may be such that at this point the edge of the opening T bears on the pivot S of the lever Q. Thereafter with the levers at their least angular separation both the lever P and the lever Q, turn on the pivot S so that the lever P moves the cut-off blade H backward to dimension the mold. Meantime the main mold blade H has been moved back against its stop by the rod G. As already stated, when the cut-off blade H has been moved back its rear end butts against a shoulder on the main blade H; in this retracted position the blades have their ends in alinement and the pressure exerted on the lever P and by it to the mold blade H is added to the pressure exerted by the rod G.

\Vhen a low quad or space is to be cast the interponent M, as above stated, is moved over the actuator O as shown in Fig. 8. As the lever F descends, the actuator O is turned on its pivot V and the lever P is operated in a direction reverse to that for high type. The lever P turns first on its end which engages the blade H thus causing the lever Q to turn on its pivot S forcing the free end U of the lever Q, against the forward end G of the rod Gr; thus the pressure applied to the lever P is distributed to the levers P and Q, causing them to swing open, the reverse pressure of the lever Q. on the levers to a bracket such as W which can be 7 screwed, riveted or otherwise fastened to the mold body, as shown in Figs. 5 and 6, the levers in this construction being the same in function but having slightly ditterent shape, as shown, to facilitate the application of the device to mechanism already in commercial use.

I claim 1. The combination with a typographic mold comprising main and cut-off blades, and separate mechanisms for operating these blades, of an equalizing device between the main and cut-off blades whereby the pressure acting on the main blade to dimension the mold is substantially the same when a low quad or space is being cast as when a full height type body is being cast.

2. The combination with a. typographic mold comprising a main and a cut-off blade, of separate mechanisms for operating each blade, one of said mechanisms: provided with an equalizing device acting on the blade operated by the other of said mechanisms whereby the force holding the cut-off blade in its forward, position acts to help hold the main blade in its retracted position.

3. The combination with a. typographic mold comprising main and cut-ofi blades, of a power actuated member for retracting the main blade, a separate power actu ate-d member for operating the cut-off blade, a pressure equalizing lever pivoted to a stationary support and a cut-off blade operating lever pivoted to the pressure equalizing lever.

A. The combination with a low-quad mold provided with main and. cutoff blades, of means for retracting the main blade, means separate from. said first named means for advancing said cut-off blade, whereby said mold is adjusted for casting a low quad, and an equalizing device connected with said cut-off blade advancing means and applying to the main blade retracting means an assisting force substantially equal to the force exerted to advance the cut-off blade.

5. The combination with a low quad mold provided with main and cut-off blades, of separate, power-actuated members for operating each blade and an equalizing device interposed. between said members, whereby in the position of the blades for casting a 10W quad, said device applies to the 11min blade an assisting fdrce to maintain it retracted which force is substantiallyequal to that applied to maintain the but-0E blade 5 a'dvz mced. I Y

6. The combination with a 10W quad mold v I v prm'idd with inhin and Gut-01f blades ind FRANK HINMAN PIERPONT.

actuating means therfor "of ni e'ans {literposed vbehvn' the bl z'l'des for distributing act'uixt'ing pofwer in opposite ch-factions to a dvziiic'e One blade and retract. the other with ,slf1l1flhmtia11y equal pressure.

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