US2707549A - Typographical casting machine - Google Patents

Description

May 3, 1955 L. ROSSE'ITO TYPOGRAPHICAL CASTING MACHINE Filed Aug. 29, 1952 5 Sheets-Sheet 1 Q INVENTOR ygwM L'wqAWArron/wfi May 3, 1955 L. ROSSETTO TYPOGRAPHICAL CASTING MACHINE 5 Sheets-Sheet 2 Filed Aug. 29. 1952 Z /A V ENTOR I W ATTORNEYS May 3," I955 L. RQSSE'ITO TYPOGRAPHICAL CASTING MACHINE Fi led Aug. 29, 1952 5 Sheets-Sheet 3 NVE/VTOR A 44 WATTORNEVS May 3, 1955 L. RossETro TYPOGRAPHICAL CASTING MACHINE 5 She'ets-Sheet 4 Filed Aug. 29. 1952 INVENTOR J flvwr'n non/m3 May 3, 1955 ROSSETTO TYPOGRAPHICAL CASTING MACHINE 5 Sheets-Sheet 5 Filed Aug. 29, 1952 2 INVEN ran er MMWA Tram/Eng distribution.

United States Patent TYPOGRAPHICAL CASTING MACHINE Louis Rossetto, Kings Point, N. Y., assignor to Mergenthaler Linotype Company, a corporation of New York Application August 29, 1952, Serial No. 307,132

26 Claims. (Cl. 199-50) This invention relates to quadding and centering devices for typographical casting machines and more particularly to devices of the type disclosed in the Frolander Patent No. 1,971,400, the Hilpman Patent No. 2,255,254, and the Turner application Serial No. 80,887, filed March 11, 1949, now U. S. Patent 2,639,027. in these patents and application, the quadding and centering devices are designed to be built in new machines and hence are not available to the trade except by the purchase of new machines. There is a growing demand for quadding and centering devices which may be applied as attachments to old or existing machines, and the present invention is intended primarily to meet that demand. However, many of the features of the instant device are equally applicable to devices of the built-in variety.

The exact construction and operation of the present device will best be understood from the detailed description to follow.

Referring to the drawings:

Fig. 1 is a front elevation of the casting portion of a Linotype machine with the present invention applied thereto;

Fig. 2 is a side elevation of the improved parts;

Fig. 3 is a perspective view showing the details of the connection between the quadding lever and the link leading to the right hand jaw;

Fig. 4 is a section taken along the line 44 in Fig. 1, showing in side elevation the locking device for one of the pawl carrying levers which operate the jaw control rod;

Fig. 5 is a rear perspective view showing the improved banking arrangement between the left hand jaw and the wedge block;

Fig. 6 is a top plan view of the parts shown in Fig. 5;

Fig. 7 is an isometric view of part of the jaw closing mechanism;

Fig. 8 is a sectional view taken along the line 8-8 of Fig. 1; and

Figs. 9, and 11 are top cross-section views of the control rod, showing the different settings thereof for quadding and centering.

A line of matrices is composed in the usual manner and transferred into 'a vertically movable line transporter or first elevator 2 slidably mounted in the vise frame 3. Upon receiving the line, the first elevator immediately descends to position it between a left hand jaw 4 and a right hand jaw 5 and in front of a slotted mold, which latter then advances from the rear into contact with the line and the two clamping jaws for the slug casting operation, the line prior to the casting operation being aligned with the mold and properly justified when the machine is operating under the usual conditions. After the slug has been cast, the mold is carried from its horizontal casting position to its vertical slug ejecting position by a three-quarter turn of a mold disk 6 and the first elevator in the meantime raised to the upper transfer level where the composed line is shifted therefrom for The first elevator then is lowered and finally 2,707,549 Patented May 3, 1955 comes to rest in its original or line receiving position just before the machine cycle is completed.

The line clamping jaws 4 and 5 are operable to cooperate with lines of less than full length so as to cast slugs with blank spaces at either end, as for quadding or at both ends for centering. For this purpose, the two jaws 4 and 5 are movable toward and from each other by a vertically movable rod 7 which may be connected at its upper end to the respective jaws through the medium of two similar oppositely disposed bell crank levers 8 and 9 pivotally mounted in the casting 10. The casting 10 and, for that matter, most of the operative parts of the present quadding and centering device, are built into a housing 11 adapted to be attached to the left-hand side of the vise frame 3. The longer arm of the lever 9 is connected by means of a long horizontally disposed link 12 to the right hand jaw 5, while the longer arm of the lever 8 is connected by means of another long horizontally disposed link 13 to the left hand vise jaw 4. The left hand vise jaw 4 is capable of adjustment with respect to the link 13 by means of a rotatable setting device 14 (Fig. 1), to provide for the proper handling of composed lines of different lengths in the normal or regular operation of the machine.

In providing for the connection and disconnection of the rod 7 with and from the jaws 4 and 5, it is equipped at its upper end with an annularly grooved collar 15 formed for engagement with diametrically opposed pins 16 and 17 protruding inwardly from the extremities of the shorter arms of the jaw actuating levers 8 and 9, respectively. The under side of the collar 15 is adapted to bank against the top surface of the casting 10 when the rod is in its lowermost position of rest. The rod 7 is mounted to slide in suitable bearings in the upper casting 10 and in a lower casting 18, and just above the latter is provided with a cylindrical rack 19 formed with a plurality of circular teeth or serrations 20. In the present instance, the rack 19 is made integrally with the rod 7, but it could, of course, be made as a separate part and keyed or otherwise secured to the'rod.

As heretofore stated, the bell crank levers 8 and 9 can be selectively connected to the vertical rod 7 to elfect the movement of either or both of the jaws 4 and 5. The inward movement of the jaws during a quadding or centering operation is effected by the upward movement of the rod 7, whereas the outward or return movement of the jaws is eflected by the downward movement of the rod. Since the justification of composed lines in regular operation (which involves no quadding or centering) takes place during each machine cycle immediately after the line has been positioned between the vise jaws, a member of the justifying mechanism is used advantageously, in the present instance, to eifect the upward movement of the rod 7. Generally speaking, there are two separate operations included in the justification of a composed line, the first operation involving the upward movement of a long fore-and-aft spring-actuated (so-called second) justification lever 21, and the second operation also involving the upward movement of the justification lever 21 in synchronism with another (so-called first) justification lever 1. Such justifying mechanism and the operation thereof are well known in the art and require no further explanation, except to point out that the upward movement of the justification lever 21 is accomplished by a powerful spring under the control of a cam on the main cam shaft of the machine. It should, therefore, be clear that during each complete machine cycle, the lever 21 operates twice, and in accordance with the present invention, the first operation is utilized to close the jaws on the line and the second operation is utilized to supply an additional or line squeeze pressure during quadding or centering.

As always, the justification lever 21 has a forked or bifurcated front end portion presenting two arms, one arm 21 serving to operate the justification bar 22 through a rod 22 and the other arm 21* serving to control a spring-actuated rod 24 which operates, in a well known manner, a wedge-shaped clamping member 23 (Fig. for the left hand jaw. The arm 21* also has connected to it an extension casting 25 presenting a lower cam surface 25 and a top cam surface 25 (Fig. 2). The cam surface 25 is adapted to engage an antifriction roller carried by a lever 26 pivotally mounted at 26 in the casting 1.3 and to thereby control its operation; while the cam surface 25 is adapted to engage another antifriction roller carried by a U-shaped lever 27,1ikewise pivotally mounted in the casting 18 at 27 (see also Fig. 8). ways urged upwardly by a long but not too powerful tension spring 28, but when the justification lever 21 is held in its normal or downward position of rest by its control cam, the cam surface 25 maintains the lever in a downward or inoperative position against the tension of the spring.

The levers 26 and 27 control the upward jaw closing and pressure applying movements of the vertical rod 7, and they do so through the medium of a series of pawls The lever 26 is al- 29, 30, 31 cooperating with the rack 19. The operation I? of the pawl 29 is controlled from the lever 26 through motion multiplying links 29 and 29", the former link being pivotally connected at one end to the lower end of the pawl 29 and pivotally mounted at the other end in the casting 18, and the latter link being pivotally connected I to the lever 26 and the link 29 near their pivots. A spring 29 normally serves to urge the pawl 29 into engagement with the rack 19 but, in its normal position of rest, the pawl is held out of engagement therewith by a guard plate 32 attached at its lower end to the casting 18.

As best shown in Fig. 7, the pawl 31 is set into a hollowed out portion of the pawl 30, and both are pivotally connected to the U-shaped lever 27 adjacent its pivot 27 so as to be moved bodily upward by the rise of the lever 27. More specifically, the pawl 31 is fast to a short shaft 33 journaled in the arms of the lever 27, and the pawl is pivotally mounted on this same shaft. A spur 34 on the shaft 33, actuated by a spring 34*, serves to rock the pawl 31 into engagement with the rack 19 but the spur is provided with a set screw 34* which, in the normal position of rest of the parts, is adapted to seat on a ledge 18 of the casting 18 and prevent such engagement. Similarly, a spur 35 protruding from the pawl 30, and actuated by a spring 35 serves to rock the pawl 30 into engagement with the rack 19 but this second spur is also provided with a set screw 35 which, in the normal position of rest of the parts, seats upon another ledge 18" of the casting 18 and prevents such engagement.

Pivotally mounted on a downward extension itl" of the casting 10 (Fig. l) is a three arm lever 40, one arm thereof garrying an anti-friction roller adapted to bear against the upper surface of the rack 1.9. The arm 40 thereof, more or less diametrically opposite the arm 40, is connected to a light spring 41 which serves to keep the roller in contact with the rack. The arm 4-9 is also connected, by means of a vertical link 42, to a dash pot 43.

The operation of the jaw closing rod 7 will now be clear: with a line of matrices in position for a quadding or centering operation, the cam-controlled spring-actuated lever 21 is permitted to rise, said rise corresponding to the upward movement for first justification in regular machine operation. As the lever 21 begins to ascend, the lever 26, under the tension of the spring 28, is also caused to rise, lifting the pawl 29. As soon as the pawl tooth passes above the upper end of the guard plate 32, the pawl 29 comes into engagement with the rack 19 and serves to effect the closing of the jaw or jaws against the composed line, the dash pot 43 regulating the speed with which this sure that can be exerted on the line by the action of the pawl 29 at this time is determined by the residual tension of the spring 28 after it has completed the jaw closing action. The further upward movement of the lever 21 brings the upper surface 2S into contact with the lever 27, and as the lever 27 moves about its pivot, it imparts an upward movement to the pawls 30 and 31 mounted thereon. These pawls come into engagement with the rack 19 the instant the respective spurs 35 and 34 unseat from the ledges 18 and 18 The full pressure of the justification spring is thereupon brought into action against the composed line to supplement the pressure of the spring 28.

The reason for employing two separate pawls 30 and 31 for the same operation should perhaps be stated. Ideally, the distances between the successive teeth or serrations 20 of the rack 19 should be very slight so that as much of the upward movement of the lever 27 as is possible can be utilized for the purpose of exerting pressure on the composed line. Actually, however, a compromise is necessary so that the individual teeth 20 may be of suffieient strength to insure against stripping. By employing two pawls, spaced in staggered relation to each other so that one will engage one of the rack teeth 20 before the other, it is possible to achieve adequate pressure on the line before too much of the movement of the lever 27 is lost.

After the above described operation, the long fore-andaft justification lever 21 is forced downwardly by the control cam on the main shaft preparatory to the second justification. The jaw closing rod 7, however, and of course the rack 19, although relieving the force initially exerted on the composed line, remain in their upward or operated position due to the balance of the system of levers and the weight of the jaws. Now, once again the lever 21 is permitted to rise, this second rise corresponding to the second and final justifieation in regular machine operation, and the pawls 29, 30 and 31 are operated in the same manner above described. At the beginning of this second operation, however, the vertical rod 7 and the rack 19 are already in raised position, as just explained, so that the full pressure of the fully tensioned spring 28 as well as the full pressure of the justification spring are brought into play against the composed line before casting.

After the casting operation, the justification lever 21 is depressed again by the further rotation of its control cam and the mold disk 6 is rotated through a three-quarter turn to the slug ejecting position; meanwhile, as before explained, the first elevator 2 lifts the matrices to the transfer channel for distribution. The present invention makes use of the ascent of the first elevator to restore the jaws to their original position of maximum separation. Toward this end (see Fig. l), the first elevator carries a cam plate 44 having an inclined surface 44 and a vertical surface 44*, which surfaces, during the ascent, engage an antifriction roller on the lower extremity of a lever 45. The lever 45 is pivotally connected to another lever 46, by means of a hinge pin 47, which pin is mounted in the vice frame 3 of the machine. A take-up spring 48 is positioned between the two longer arms of the levers 45 and 46, and an adjustable screw 49, which serves to keep the spring 48 under compression and to regulate the amount of compression, is positioned between the two shorter arms. At its lower end, the lever 46 is pivotally connected to the free end of the arm 40 of the beforeaetion takes place. It is evident that the maximum pres- '1' 3 mentioned three-arm lever 49 by means of a long link 50. It can be seen at once that when the first elevator 2 makes its ascent, the inclined surface 44 will quickly move the link 50 in a leftward direction, imparting a clockwise rotation to the lever 40, and the arm 40 will thereby be depressed to effect the downward movement of the vertical rod 7; any resulting shock caused by such return action will be absorbed by the spring 48 and the dash pot 43.

As before stated, the vertical rod 7 is equipped at its volves no quadding or centering), the vertical rod is not required to function, hence (as shown in Fig. 8) the teeth or serrations 20 of the rack 19 are cut away at diametrically opposite sides to leave vertical grooves which, by rotation of the rod, may be brought into line with the pawls 29, 30 and 31 to render them completely ineffective. When the right hand jaw is to be connected alone to the actuating rod 7, the collar 15, by a partial rotation of the rod, is set in the position shown in Fig. 9 so as to locate one of its two notches 15* in line with the connecting pin 16 for the left hand jaw but both out a of line with the pin 17 for the right hand jaw. When both jaws are to be connected to the rod 7 for centering. the collar 15, by another partial rotation of the rod, will locate its two notches out of line with both pins 16 and 17, as shown in Fig. 10. Finally, when the left hand jaw is to be connected to the rod 7 for left jaw quadding, the collar 15, by a further rotation of the rod, is set in the position shown in Fig. 11' to bring one of its notches in line with the pin 17 for the right hand jaw but both out of line with the pin 16 for the left hand .jaw. In order to prevent accidental rotation of the rod 7 during its upward and downward movements, the lower segment of the collar 15 is also provided with three smaller notches 15 one of which is adapted, in each of the three positions for quadding or centering, to be aligned with a guide formed in the casting 10.

The means employed to set the collar in its different angular positions, in the manner above stated, include pulleys 52 and 53 connected by a flexible band or wire 54 (as shown in Fig. 1) and a guide roller 55 therefor. The pulley 52 is mounted in the casting 10 and keyed to the rod 7. The pulley 53 is mounted on the right-hand side of the housing 11 and is adapted to be rotated by a hand lever 56 through a long shaft 57 and a gear set 58. The hand lever 56 is equipped with an indicator to be used in association with a'dial 60 to aid the operator in making the various settings of the control rod 7.

The connecting link 13 is pivoted directly at one end to the operating lever 8 and directly at its other end to the sliding carriage 4 (later to be described) for the left hand jaw 4, whereas the link 12, while pivoted directly at one end to the right hand jaw 5, is pivoted at its other end to the operating lever 9 through the medium of an eccentric 9 attached to a pivot pin 9 journaled in the upper end of the lever 9 and rotatable within a circular sleeve 12' formed on the end of-the link 12 (see Figs. 1, 2 and 3). The pivot pin 9 has fast thereto a crank arm 9 connected at its free end to the upper end of a relatively long link 9 pivoted atits lower end at 9* to the housing 11. According to this arrangement, when the lever 9 is rocked in a counterclockwise direction in effecting a quadding or centering movement of the right hand jaw 5, the crank arm 9 will be moved upwardly to rotate the eccentric 9' in a counterclockwise direction; whereas, when the lever is rocked in a clockwise direction'in restoring the right hand jaw to its original position of rest, the crank arm will be moved downwardly to rotate the eccentric in a clockwise direction. The purpose and elfect of this arrangement are to equalize thelinear movements of the two vise jaws in performing a line centering operation. The point is that, if the two links were both pivoted directly to their respective operating levers, the extent of linear movement of the vise jaws would vary somewhat, due to the difference in length of the two links and to the fact that one (the right jaw link 12) is a pushing element while the other (the left jaw link 13) is a pulling element during a centering operation. The eccentric 9 is so proportioned that it will eliminate this variation in linear movement of the two jaws notwithstanding the conditions stated. A similar result could be accomplished by making the links rigid with the vise jaws or their bearing blocks and forming them with straight vertical slots to receive the pivot pins of the operating levers.

As above indicated, the link 13 is not pivoted directly to the left hand jaw 4 but, rather, to a sliding carriage 4 which in turn is connected to the left hand jaw by means of a rotatable screw rod 14 which is operated by the jaw setting device 14 before referred to. At its left end, the screw rod 14 has a plain bearing portion journaled in the carriage 4 and at its other end is telescopically connected to a rotatable sleeve passing through a bore in the right hand jaw and connected for rotation to the handle 14, all as more fully described in the Brandenburg Patent No. 2,247,986.

When the sliding carriage 4 occupies its fully retracted position, as shown in Figs. 5 and 6, either for a regular machine operation or for quadding with the right hand jaw, the projecting head portion 14 of the screw rod 14 will bank against a cross-head 4 on a slide 4, which latter is attached to the vise frame 3 by a pair of pins and slots 4 for a limited movement lengthwise of the left hand jaw. The cross-head 4 in turn banks against the customary plunger 23 which is actuated in the usual way from the wedge bar 23 through the cooperating sliding block 23 As is well understood in the art, the wedge bar 23 is raised by the justification lever 21 through the rod 24 during line justification in order to set the left hand jaw 4 (when the machine is conditioned for a regular operation or for quadding with the right hand jaw) in its proper position, that is to say, with its matrix engaging face in accurate alignment with the end wall of the mold slot. Ordinarily, or when the machine is not equipped with a quadding and centering attachment, the left hand jaw will bank directly against the plunger 23, which, as will be noted from Fig. 6, is substantially in line with the jaw. However, in the instant construction, due to the use of the sliding carriage 4 and its connection with the left hand jaw through the adjusting screw rod 14 the sliding cross-head 4 is needed to transmit the thrust of the plunger 2. to the sliding carriage and thence to the jaw. The cross-head 4 and its carrying slide 4 are made sturdy or massive enough to perform their required function notwithstanding the offset or out-ofline relation of the plunger 23 and the head portion 14" of the screw rod 14 In other words, the left hand jaw will be moved precisely the same distance, through the sliding cross-head interponent, as it would if it banked directly against the plunger 23*, thus avoiding any bleeding which might occur if the jaw failed to move the required distance for accurate alignment with the end wall of the mold slot. And it may be noted here that the presence of the cross-head interponent does not in any way interfere with the quadding and centering operations or with the parts asssociated therewith.

When the machine is conditioned. for a quadding or centering operation (see Fig. l), the justification bar 22 is locked out of action by means of a lever 70 pivoted at its upper end, as at 71, to the viseframe 3 and formed at its lower end with a latch 72 for engagement with a sleeve 73 secured to the right hand rod 22 which is operated by the first justification lever 1, before referred to. This locking of the lever 1 does not prevent the second justification lever 21 from operating the control rod 7 in the manner before described, since there is ample lost motion between the lever 21 and the sleeve 73 on the left hand rod 22. The lever 70 is rocked to and from its locking position by a cam wheel 74 attached to the left end of the long shaft 57, before alluded to, this cam wheel having a shoe 75 (see also Fig. 4) for engagement with a pin 76 projecting forwardly from a lever 77 pivoted at 78 to a supplemental housing 11 mounted on the right side of the main housing 11. At its upper end, the lever 77 is pivotally connected to the locking lever 7t) by a long link 79; and near its pivot 78, it is formed with a short arm 80 which is connected to a tension spring 81 anchored at 32 to the housing 11. The Spring 81 tends normally to hold the lever 70 in its locking position, as shown in Fig. l, at which time the cam shoe 75 is out of engagement with the pin 76 (see also Fig. 4), but when the shaft 57 is rotated by the handle 56 to condition the machine forregular operation, the shoe 75 will be brought into engagement with the pin 76 and rock the lever 77 in a counterclockwise direction, against the tension of the spring 81, and thereby rock the lever '70 to its unlocking position.

While the control rod 7 is not operated when the machine is conditioned for regular operation, due to the fact that the rack teeth 20 are cut away at opposite sides to avoid engagement with the pawls 29, 3t and 31 in that position of the control rod, nevertheless the pawls themselves would still be operated by the justification lever 21, which must of course be actuated during each machine cycle to perform its required functions. Hence (see Figs. 1 and 4), it is proposed to lock the lever 26 and its actuating spring 28 out of action at the time stated, that is to say, whenever the machine is conditioned for regular operation. To this end, the lever 77 is connected by means of a horizontal link 83 to the upper end of a vertical lever 84 intermediately pivoted, as at 85, to the casting 18 and formed at its lower end with a latch 86 for engagement with the leved 26. According to this arrangement, the locking lever 70 and the locking lever 84 are both controlled from the machine conditioning handle 56. Thus, when the machine is set for quadding or centering, as in Fig. 1, the locking lever 70 will be active and the lever 84 inactive; whereas when the machine is set for regular operation, the locking lever 84 will be active and the locking lever 7t) inactive. Hence, the locking lever 84 not only prevents what would otherwise be an idle movement of the pawl 29 and the connected parts but, in addition, it relieves the main cam shaft of the burden of retensioning the spring 28 during each machine cycle ferred form, but obviously many variations and modifications may be made therein and in its mode of application which will still be comprised within its spirit. It is to be understood, therefore, that the invention is not to be limited to any specific form or embodiment, except insofar as such limitations are specified in the appended claims.

This application is a continuation-in-part of application Serial No. 183,033, filed September 2, 1950.

What is claimed is:

1. In a typographical casting machine, the combination of a pair of line clamping jaws movable one toward the other in quadding, a power-operated member operable twice in the same direction during each machine cycle, means controlled by said member in its first operation in one direction for effecting the quadding movement of the jaw and in its second operation in the same direction for applying a line squeeze pressure to the jaw, and additional means actuated by said member in each of its operations in the same direction for applying a line squeeze pressure to the jaw.

2. The combination according to claim 1, wherein each of said means comprises a reciprocable pawl which is returned to starting position after the first operation of the power-operated member, and a toothed rack connected to the quadding jaw and with which the reciprocable pawl cooperates.

3. In a typographical casting machine, the combination of a pair of line clamping jaws movable one toward the other in quadding, a power-operated member operable twice in the same direction during each machine cycle, means controlled by said member in its first operation in one direction for effecting the quadding movement of the jaw and in the second operation thereof in the same direction for applying a line squeeze pressure to the jaw, and

. additional means actuated by said member in each of its operations in the same direction for applying a line squeeze pressure to the jaw in its quadding position.

4. In a typographical casting machine, the combination of a pair of line clamping jaws movable one toward the other in quadding, a vertically movable rod connectable to the jaw for effecting its quadding movement, a toothed rack on said rod, said rack presenting a series of teeth arranged at different levels, a reciprocable pawl to cooperate with said rack, a power-operated member operable twice in the same direction in each machine cycle, and a spring-actuated lever system controlled by said member in its first operation in one direction for actuating the pawl to efiect the jaw closing-movement of the rod and in the second operation of said member in the same direction for actuating the pawl to apply a line squeeze pressure to the rod in the quadding position of the jaw.

5. The combination according to claim 4, wherein the reciprocable pawl is returned to its starting position by the power-operated member after its said first operation while the jaw is left in its quadding position and whereby said pawl in the said second operation of the power-operated member is caused to exert its full line squeezing pressure on the jaw closing rod, and including means distinct from the power-operated member for returning the vertically movable rod and the toothed rack thereon to their original position after a quadding operation.

6. In a typographical casting machine, the combination of a pair of line clamping jaws movable one toward the other in quadding, a vertically movable rod connectable to the jaw for effecting its quadding movement, a toothed rack on said rod, said rack presenting a series of teeth arranged at different levels, a reciprocable pawl to coopate with said rack, a power-operated member operable twice in the same direction in each machine cycle, and a lever system actuated by said member in its first operation in one direction for applying through said pawl a line squeezing pressure on the jaw closing rod and in the second operation thereof in the same direction for rebuilding through said pawl 21 greater line squeezing pressure.

7. The combination according to claim 6, wherein the reciprocable pawl is returned to its starting position after the said first operation of the power-operated member while the jaw is left in its quadding position, whereby said pawl in the said second operation of said member is caused to exert its full line squeeze pressure on the jaw closing rod, and including means distinct from the power-operated member for returning the vertically movable rod and the toothed rack thereon to their original position after a quadding operation.

8. In a typographical casting machine, the combination of a pair of line clamping jaws movable one toward the other in quadding, a vertically movable rod connectable to the jaw for effecting its quadding movement, a toothed rack on said rod, said rack presenting a series of teeth arranged at different levels, a reciprocable pawl to cooperate with said rack, a spring-actuated lever system for operating the pawl to effect the jaw closing movement of the rod, and means for controlling such operation of the lever system.

9. In a typographical casting machine, the combination of a pair of line clamping jaws movable one toward the.

other in quadding, a vertically movable rod connectable to the jaw for effecting its quadding movement, a toothed rack on said rod, said rack presenting a series of teeth arranged at different levels, a reciprocable pawl to cooperate with said rack, a power-operated member operable twice in the same direction in each machine cycle, and means actuated by said power-operated member in each of its operations in the same direction for operating said pawl, to apply a line squeeze pressure on the jaw closing rod.

10. In a typographical casting machine, the combination of a pair of line clamping jaws movable one toward the other in quadding, a vertically moable rod connectable to the jaw for effecting its quadding and return movements, a toothed rack on said rod, a reciprocable pawl to engage said rack in elfecting the jaw closing movement of the rod, an operating member for said pawl, means for normally holding the pawl out of engagement with the rack and means released by the initial movement of the operating member for engaging the pawl with the rack.

11. The combination according to claim 10, wherein the means for normally holding the pawl out of engagement with the rack comprises a relatively stationary guard plate to cooperate with the upper end of the pawl.

12. In a typographical casting machine, the combination of a pair of line clamping jaws movable one toward the other in quadding, a vertically movable rod conneetable to the jaw for effecting its quadding and return movements, a toothed rack on said rod, a reciprocable pawl to engage said rack in the jaw closed position of the rod to apply a line squeeze pressure thereto, an operating member for said pawl, means for normally holding the pawl out of engagement with the rack, and means released by the initial movement of the operating member for engaging the pawl with the rack.

'13. The combination according to claim 12, wherein the means for normally holding the pawl out of engagement with the rack comprises a spring biased spur connected to the pawl, and a relatively stationary ledge to cooperate with said spur.

14. In a typographical casting machine, the combination of a pair of line clamping jaws movable one toward the other in quadding, a vertically movable rod connectable to the jaw, a spring for actuating the rod in one direction to effect the quadding movement of the jaw, a line transporter, and means controlled by said transporter for actuating the rod in the opposite direction to effect the return movement of the jaw, said means comprising two independently mounted levers, a link connecting said levers, one located in the zone of action of the transporter and the other located remote from said zone and in the vicinity of the vertically movable rod, and a cam plate carried by the line transporter to engage one of the levers.

15. In or for a typographical casting machine, a quadding and centering mechanism comprising, in combination, a pair of upright pivoted levers movable in opposite directions to each other in centering, a corresponding pair of links connecting the upper ends of the levers to their respective vise jaws, one link being longer than the other and one acting as a pull link and the other as a push link in operation, and means forming part of the operating connections between the long pull link and its corresponding pivoted lever to equalize the linear movements of the two jaws during centering.

16. A combination according to claim 15, wherein the equalizing means comprise an eccentric connection of one link with its operating lever, and a device actuated by the pivotal movement of said lever for rotating the eccentric, said device being pivoted at one end to a fixed part of the machine and pivotally connected at its other end to a crank arm fixed to the eccentric shaft.

17. A combination according to claim 8, including means for rotating the toothed rack into or out of engaging relation to the reciprocable pawl for quadding or a regular machine operation, and automatic means for locking the spring-actuated lever system against action during a regular machine operation.

18. A combination according to claim 8, including means for rotating the toothed rack into or out of engaging relation to the reciprocable pawl for quadding or a regular machine operation, and a locking device operated from said rack rotating means to prevent or permit the action of the spring-actuated lever system, according to the conditioning of the machine.

19. A combination according to claim 8, including means for rotating the toothed rack into or out of engaging relation to the reciprocable pawl for quadding or a regular machine operation, a justification bar, and a locking device operated from said rack rotating means to prevent or permit the operation of said bar, according to the conditioning of the machine.

20. A combination according to claim 8, including means for rotating the toothed rack into or out of engaging relation to the reciprocable pawl for quadding or a regular machine operation, a locking device operated from said rack rotating means to prevent or permit the action of the spring-actuated lever system according to the conditioning of the machine, a justification bar, and a locking device also operated from the rack rotating means to prevent or permit the operation of said bar according to the conditioning of the machine.

21. In a typographical casting machine equipped with a quadding and centering mechanism, the combination of a left hand vise jaw, a sliding carriage for operating the jaw during quadding or centering, a rotatable screw rod connecting the jaw adjustably to the carriage, a vertically movable wedge bar, a horizontally slidable block cooperating with the wedge bar, a plunger carried by the slidable block, said plunger being arranged out of line with the sliding carriage, and means for transmitting the inward movement of the plunger to the sliding carriage.

22. A combination according to claim 21, wherein the last-mentioned means comprise a slidable cross-head banking at one side against the plunger, and a pin projecting from the sliding carriage and banking against the opposite side of the cross-head.

23. In a typographical casting machine, the combination of a pair of line clamping jaws movable one toward the other quadding, a vertically movable rod connected to the jaw for effecting its quadding movement, a toothed rack on said rod, a reciprocable pawl to cooperate with said rack, a lever system connected to the pawl, a spring connected to said lever system and acting constantly to actuate the pawl for a jaw quadding movement, a springactuated cam-controlled justifying lever operable both upwardly and downwardly twice during each machine cycle, and a cam element carried by the justifying lever and engaged with the lever system, said cam element in the first upward movement of the justifying lever permitting the tensioned spring to actuate the pawl for a jaw quadding movement and in the first downward move ment of said lever to restore the pawl to its starting position and re-tension the spring, and said cam element in the second upward movement of the justifying lever permitting the tensioned spring again to actuate the pawl for a line squeeze pressure on the jaw in its quadding position and in the second downward movement of said lever to restore the pawl again to its starting position and re-tension the spring.

24. The combination according to claim 23, including a second reciprocable pawl to cooperate with the toothed rack on the vertically movable rod, a second lever system connected to the pawl, and a second cam element carried by the justifying lever and engaged with the second lever system, said cam element in the first upward movement of the justifying lever actuating the second pawl through the second lever system to apply a line squeeze pressure on the jaw in its quadding position and in the first downward movement of said lever to restore the pawl to its starting position, and said cam element in the second upward movement of the justifying lever again actuating the second pawl through the second lever system to re-apply a line squeeze pressure on the jaw in its quadding position and in the second downward movement of said lever to restore the second pawl again to its starting position.

25. The combination according to claim 23, wherein the motion of the cam element carried by the justifying lever is substantially multiplied by the lever system in actuating the reciprocable pawl.

26. The combination according to claim 24, wherein the motion of the second cam element carried by the justifying lever is substantially reduced by the second lever system in actuating the second reciprocable pawl.

References Cited in the file of this patent UNITED STATES PATENTS 678,310 Vinton July 9, 1901 958,530 Pickett May 17, 1910 1,124,180 Sperry Jan. 5, 1915 1,958,335 Gilbert May 8, 1934 2,035,078 Kingsbury Mar. 24, 1936 2,051,804 Albrecht Aug. 25, 1936 2,092,211 Hilpman Sept. 7, 1937 2,255,254 Hilpman Sept. 9, 1941

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