US1220057A - Casting-machine. - Google Patents

Description

J. S. BANCROFT & M. C. INDAHL.

CASTING MACHINE.

APPLICATlON FILED AUG-l3. 1915.

1,220,057. Patented Mar. 20, 1917.

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CASTING MACHINE.

APPLICATION .HLED AUG. [3. 1915- I 1,220,057, Patented Mar. 20, 1917.

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CASTING MACHINE. APPLICATION FILED AUG. 13. 1915.

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CASTING MACHINE. APPLICATION men AUG. 12.1915.

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UNETED STATES PATENT OFFICE.

JOHN SELLERS BANCROFT AND MAURITZ C. INDAHL, F PHILADELPEIA, PENNSYL- VANIA, ASSIGNOES TO LANSTON MONGTYBE MACE-ZINE COMPANY, 0F PHILADEL- PHIA, PENNSYLVANIA, A CORPORATION OF VIRGINIA.

CASTING-MACHINE.

To all whom it may concern:

Be it known that we, JOHN SELLERS BAN- onorr and MAUmTz C. INDAHL, citizens of i the United States, residing at Philadelphia,

in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Casting Machines; and we 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 figures and letters of reference marked thereon.

This invention relates to casting machines and more especially to machines for casting type in accordance with the now well understood Lanston monotype system, the objects of the invention being to provide a means whereby the matrix case and matrix therein which has been brought to posit-ion over the mold will be guarded or protected against any possible accidental disturbing influence, due to the continued or false movements of the positioning mechanism or any movements thereof subsequent to the time when the matrix has been brought into position and prior to the time when the matrix is locked inposition for the casting operation. By so guarding the matrix against any disturbing influence, its cooperation with the centering-pin is made more certain, the life of the parts is prolonged bythe elimination of the possibility of the centering pin failing to cooperate with the matrix in the manner designed, and it becomes possible to distribute the movements of the positioning mechanism more evenly,throughout a working cycle, thereby contributing to the speed and ease with which the automatic functions of the machine may be performed.

In carrying the invention into practice, a. guard or protecting member is provided which is adapted to be primarily positioned in unison with the positioning of the matrix, and, when positioned, is locked and adjusted to form astop or abutment which will prevent the reengagement of the positioning mechanism or aws with the matrix and the latter are therefore free for continuing or subsequent movements, and by no possibility can any vibration or false movement of the positioning mechanism affect the matrix itself during the interval between the time Specification of Letters Patent. Patgnted 20 1917 Application filed August 13, 1915.

Serial No. 45,420.

when it is positioned and the time when the parts are locked up for the casting operation. e

. Referring to the accompanying draw- 1ngs,'-

Figure 1 is a. top plan view of so, much of a Lanston monotype casting machine as is deemed necessary for a complete understanding of the present invention, many of the parts, however, being omitted in order that the mechanism relatingto the present invention may not be obscured.

Fig. 2 is a perspective View of the guard devices with their operating mechanisms, detached from the machine.

Fig. 3 is an elevation of the mechanism shown in Fig. 2, the point of view being from the right hand side of Fig. 1.

Fig. 4 is an elevation looking at one of the guard operating mechanisms from a point of View indicated by the arrow 4 in Fig. 3, with the motor cylinder in section.

Fig. 5 is a sectional plan view of one of the guard devices with its guiding and locking mechanisms.

Fig. 6 is a perspective view showing the under and upper faces of the turntable plates at the left hand side of Fig. 1 on which the pawls are mounted for locking the guard.

Fig. 7 is a perspective view of oneof the guard supports and guides.

Fig. 8 is a vertical section substantially on the line 88 of Fig. 3.

Figs. 9 and 10 are vertical sections through the valve mechanism shown in Fig. 8, taken in planes to show the ports and passages leading from the valve to the motor cylinders of the guards.

Like reference characters .in the several figures indicate the same parts.

The mechanism of the Lanston monotype casting machine for moving the matrices into position over the mold under the control of signal set devices is now well understood and a particular description of the same for a full'understanding of the present nvention 1S not necessary herein, especially as it is fully set forth in the patent heretofore granted to J. S. Bancroft, No. 625,998, dated May 30, 1899, and to which reference may be had for an understanding of those parts of the machine not herein illustrated. In Fig. 1 of the accompanying drawings the tong j aw bell crank indicated at 1, the pin jaw tongs at 2, the matrix jaw tongs at 3, the pin jaws at at, the matrix jaws at 5, and some of the signal set pins at 6, said pins, of course, serving to determine the points at which the pin jaws a will close. The mold is indicated at 7 and the matrices and matrix case in dotted lines at S. The sliding frame in which the matrix case is mounted is indicated at 9, said frame being guided and controlled by the cross slide 10 and the latter is positioned by the cross slide draw rod 11, having a head 1 located between the rear matrix jaws 5. The matrix case is likewise connected with a draw rod 13 having a head 14: located between the front matrix jaws 5.

In operation the pin jaws in closing upon the signal set pins set stop racks 15 and the latter control the position at which the matrix jaws shall close. The pin tongs and matrix tongs operate simultaneously in opposite directions whereby, during the return of t 1e pin tongs and jaws to their outer position, the matrix tongs and jaws close for positioning the matrix, and vice versa. The parts are given motion and connected for simultaneous operation through well known connections which it is unnecessary to describe herein, inasmuch as they form no part of the present invention.

The matrix jaws 5, having positioned the matrix over the mold, should be immediately freed from th matrix and the latter is thereafter accurately centered and locked in position by the usual vertically movable centering pin. During the interval between the positioning of the matrix over the mold and setting of the centering pin and locking of the parts for the casting operation there is liability of the matrix jaws disturbing the position of the matrix, this liability being accentuated when the matrix is positioned with one or the other of the jaws in proximity to the extremity of its outward movement, and in order to overcome this difficulty the present invention provides a means in the form of a guard mechanism which is primarily positioned by the matrix jaws simultaneously with the positioning of the matrix itself, and which guard mechanism is locked when the matrix is positioned and caused to spread, as it were, to form an abutment between the mat ix "aws which will thereafter prevent the re'e'ngagement of the jaws with the matrix so that the latter cannot be accidentally disturbed by movements of the matrix jaws.

Inasmuch as there are two pairs of matrix jaws a guard mechanism is provided for each and a detail description of one will answer for'both. This guard mechanism embodies primarily a head or projection 16 preferably made in two parts 16 and 16, respectively, adapted to project between the matrix jaws 5. Said heads or projections are mounted on slides 17 and 17, adapted to move in guideways formed in guard carriers 18 in the form of brackets rigidly but adjustably mounted on the main frame of the machine as at 19. The slides 17 and 17 a work through the carriers 18 and are provided on their outer faces with ratchet teeth in the form of racks 20. A locking mechanism is adapted to cooperate with these racks for locking the guards 16, 16 after they late been positioned by the matrix jaws, said locking mechanism also performing the additional function of moving the guards 16, 16 with relation to each other, whereby they are spread as it were, between the matrix jaws and may serve, if so desired, to separate jaws and subsequently to prevent the jaws from again coming into engagement with the matrix moving devices or heads 12 and 1 1 of the draw rods.

in the preferred embodiment and as illustrated, the carriers 18 are of annular form, best seen in Figs. 5 and 7 and are adapted for the reception of turntables 0r pawl carriers 21 formed of upper and lower circular members journaled in the carrier 18 and provided with internal pawls 22 adapted under certain circumstances to cooperate with the racks 20. The pawls 22 are normally held out of engagement with the racks 20 by movement of the turntable 21 in a reverse direction, as illustrated, for example, in Figs. 5 and 6, wherein it will be seen that shoulders 23 on the pawls are in engagement with pawl release projections 2 1 on the turntable itself, and although said pawls are spring-pressed toward each other, by a cross spring 25 cooperating with pins 26 projecting through enlarged apertures 27 in the turntable, they cannot come into engagement with the racks until the turntable is turned in a direction indicated by the arrow and the word On in Fig. 5. When the turntable is moved in the direction of the arrow marked On, the pawls will engage the racks and during the continued movement of the turntable the racks and slides 17, 17 will. be moved longitudinally in opposite directions, thereby spreading the two-part head 16, 16 between the matrix jaws. hen the pawls are out of engagement with the racks on the slides, the slides and projections 16, 16 left free for movement under the control of the matrix jaws themselves, the said projections 16, 16 will be collapsed, by the closing of the jaws, and the whole guard will be adjusted in unison with the adjustment of the matrix.

To perform the function of locking the guards and spreading the ends of the guards between the matrix jaws, the turntables are Pl'OVl'ciQd. with a motor mechanism which is under the control of a cam on the cam shaft of the machine. The motor mechanism is preferably a pneumatically operated mechanism, and the function of the cam is to admit pressure and permit of the exhaust of pressure from one side or the other of the motor piston in accordance with the proper timing of the machine, so that the guards will be spread and locked when the matrix reaches its position of adjustment by the matrix jaws.

The motor mechanism for each guard preferably embodies. a simple cylinder,- that for the front guard being indicated at 28 and that for the rear guard being inclicated at 29. One of the cylinders is illustrated in section in Fig. 4, from which figure it will be seen that the cylinder is provided with a double-acting piston 30 and with an adjustable stop 31 for limiting the movement of the piston in one direction. Each piston rod 32 is connected through an adjustable link connection 33 with turntable 21 and the two cylinders are provided with ports and passages in communication with pipes 34 and 35 leading to the front and rear ends of the cylinders respectively. The pipes 34 and 35 lead to a distributing valve mechanism located at the side of the machine in proximity to the cam shaft and preferably mounted on or formed as a part of the bracket 36 which is connected with the machine frame. The distributing valve embodies a casing 37 in which is a vertically moving cylindrical valve 38 adapted to be moved upwardly by a push rod 39 bearing on an adjustable support 40 carried by a swinging arm 41 pivoted at 42 and having its lower end forked for the reception of an antifriction roller 43. The roller 43 bears on the periphery of cam 44 mounted on the cam shaft 45.

Upward movement of the valve 38 serves to admit pressure to the rear ends of the motor cylinders, thereby advancing the pistons and causing the engagement of the pawls with the guard slides, such upward movement of the valve also permitting pressure to exhaust from the forward ends of the cylinders. Downward movement of the valve reverses the. conditions and permits the pressure to exhaust from the rear ends of the cylinders and admits pressure to the forward ends of the cylinders. To accomplish these results the arrangement 'of valve ports and passages illustrated in Figs. 8, 9 and 10, is preferably employed, that is to say, pressure from any suitable source is admitted to the upper end of the valve casing through a. supply pipe 46 and normally tends to hold the valve 38 down. The valve is provided with a central bore at the upper end indicated at 47 and from this bore lateral openings lead into an annular passage 48 which is adapted to register, when the valve is elevated, with the passages 49, in communication with the pipes 35, and when the valve is in its lowered position, the said annular passage 48 communicates with passages 50 in communication with the pipes 34. The lower end of the valve 38 is also provided with a central bore conveniently serving both as the exhaust opening and as a seat for the push rod 39, Said bore is in communication with an annular passage 51, which, when the valve is in elevated position, is in communication with a lower extension of the passages 50, and when the valve is in its lowered position, it is in conimunication with a lower extension of the passages 49, whereby, when the valve is elevated, the pistons in the motor cylinders will be advanced and when the valve is lowered the pistons in the motor cylinders will be retracted, such movements taking place with extreme rapidity. By the proper timing of the cam they can be made'tc take place instantly when the matrix has been positioned over the mold by the matrix jaws and the centering pin has begun to center the matrix socket. The spreading of the guards may exert a pressure tending to open the matrix jaws and said guards will be locked in position until such time as that the parts shall be freed, for the subsequent setting operation of the matrix. The dwell of. the cam is proportioned to give this result, and the matrix will be effectually guarded against any possible disturbance by reason of the continued movement of the matrix jaws or any false movements of said jaws, such as might be occasioned by vibration.

What is claimed is:

1. A casting machine embodying the following instrumentalities, to wit: a mold, a matrix, means for positioning the matrix with relation to the mold, and means for temporarily preventing the accidental reengagement of the positioning mechanism with the matrix after the latter has been positioned.

2. A casting machine embodying the following instrumentalities, to wit: a mold, a matrix, means for positioning the matrixwith relation to the mold, a movable guard positioned in uniso-n'with the matrix, and means for holding the guard in position to temporarily prevent the accidental regagement of the positioning mechanism with the matrix after the latter has been positioned.

3. A casting machine embodying the following instrumentalitiesto Wit: a mold, a matrix, means for positioning the matrix with relation to the mold, operating mecha-' nism therefor, operating connections intermediate the matrix and its positioning mechanism independent of the operating mechanism for the positioning means.

4:. A casting machine, embodying the following instrumentalities, to wit: a mold, a matrix, means for positioning the matrix with relation to the mold, operating connections, means for separating the operating connections between the matrix and its positioning means and for holding such separating means in fixed position to form a guard for preventing the accidental reengagement of the positioning means with the matrix.

5. A casting machine embodying the following instrumentalities, to wit: A mold, a matrix case, means for moving the matrix case to position the matrices with relation to the mold, embodying oppositely movable jaws, means independent or the positioning mechanism for opening the jaws after the case is positioned, and for temporarily preventing the reengagement of the jaws with the matrix case.

6. A casting machine embodying the following instrumentalities, to wit: a mold, a matrix case, jaws movable toward and from each other to position the matrix case, a movable guard interposed between the jaws and positioned thereby, and means for operating the guard to separate the jaws and for holding the guard in fixed position to temporarily prevent the reengagement of the jaws with the matrix case.

7.. In a type casting machine, the combination with means for positioning a matrix with relation to the mold, embodying oppositely movable jaws and operating means for closing and opening the jaws, of means independent of the jaw operating means for temporarily preventing the closing of the jaws after a matrix has been positioned thereby.

8. In a type casting machine, the combination with means for positioning a matrix with relation to the mold, embodying oppositely movable jaws, operating means for closing and opening the jaws, and an adjustable stop for determining the point at which the jaws will close, of a guard positioned by the jaws, and means for locking the guard temporarily in its adjusted position independently of the jaws and matrix, said guard being adapted to form an abutment to temporarily prevent the advance of the jaws into matrix engaging position.

9. In a type casting machine, the combination with the oppositely movable matrix jaws, matrix carrier positioned by said aws, and signal controlled means for determining the point at which the jaws shall close, of a guard positioned by the jaws in unison with the matrix, and means for temporarily locking said guard in adjusted position to prevent the jaws from moving the matrix prior to the subsequent signal controlled movement of the jaws.

10. In a type casting machine, the combination with the oppositely movable matrix jaws, matrix carrier positioned by the jaws, and signal controlled stop for determining the closing position of the jaws, of a guard positioned by the jaws in unison with the matrix, and motor mechanism cooperating with the guard to lock the same in position to temporarily prevent forward movement of the jaws from disturbing the position or" the matrix.

11. In a type casting machine, the com bination with the oppositely movable matrix jaws, matrix carri r positioned by the jaws, and signal controlled stops for determining the closing POSlJlOH of the jaws, of a two-part guard positioned by the jaws in unison with the matrix, and motor mechanism cooperating with the guard to spread the same between the jaws and to temporarily lock the same in fixed position for preventing the reengagement of the jaws with the matrix, prior to the succeeding signal controlled movement.

12. In a type casting machine, the combination with the oppositely movable matrix jaws, matrix carrier positioned by the jaws and signal controlled stop for determining the closing position of the jaws, of a two-part guard, positioned by the jaws in unison with the matrix, a motor cylinder and piston, connections intermediate the A iston and guard, whereby the two parts of the guard may be spread and the guard locked in fixed position, and means for admitting pressure to opposite ends oi the cylinder in timed relation to the movements of the matrix jaws.

13. In a type casting machine, the combination with the matrix case movable in two directions, pairs of jaws arranged to operate in planes substantially at right a11- gles to each other and cooperating with the matrix case for positioning the same, signal controlled stops for determining the closing position of the jaws, and means for operating the jaws of both pairs in unison, of guards positioned between each pair of jaws in unison with the matrix case, locking mechanism for holding said guards temporarily in their set position, and means for simultaneously operating the locking mechanism of both guards.

14. In a type casting machine, the combination with the oppositely movable matrix jaws, matrix case positioned by the jaws, and signal controlled stop for determining the closing position of the jaws, of a two part guard positioned by the jaws in unison with the matrix case, slides on which said guards are mounted, a fixed guide for the slide, a turntable, pawls mounted on said turntable and cooperating with the slides to advance the latter in opposite directions and spread the two-part guard between the jaws, and means for operating said turntable in timed relation to the closing movements of the jaws.

15. In a type casting machine, the combination with the oppositely movable matrix jaws, matrix casepositioned by the jaws and signal controlled stops for determining the closing position of the jaws, of a two-part guard positioned by the jaws in unison with the matrix, slides on which the two-part guard is mounted, said slides embodying oppositely facing rack bars, a fixed guide ,for the slides, a turntable, pawls mounted on said turntable in position to cooperate with the rack bars for moving the slides in opposite directions. to spread the guard, shoulders on the turntable, normally holding the pawls out of engagement with the rack bars, and means for moving the turntable in timed relation to the elosing of the matrix jaws.

JOHN SELLERS BANGROFT. MAURITZ C. INDAHL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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