US2201132A - Typographical slug casting machine - Google Patents

Description

y 17940- c. A. ALBRECHT El AL 2,201,132

TYPOGRAPHICAL SLUG CASTING MACHINE Filed Oct. 22, 1938 2 Sheets-Sheet 1 May 21, 1940; c. A. ALBRECHT ET AL 2,201,132

I TYPOGRAPHICAL SLUG CASTING MACHINE Filed Oct. 22, 1958' .2 Sheets-Sheet Patented May 21, 1940 UNITE rare PATENT FFiCE TYPOGRAPHICAL SLUG CASTING MACHINE Application October 22, 1938, Serial No. 236,463 In Germany March 7, 1938 10 Claims.

This invention relates to typographical slug casting machines, and is applicable to machines of the kind known under the registered trademark Linotype.

In known machines, a mould disc carrying the moulds is intermittently rotated by a mechanism operated from the cam shaft of the machine, and for this purpose a toothed segmlent is provided on the cam shaft and the intermittent rotation lasts so long as the toothed segment is in engagement with the pertinent pinion. During the periods when the mould disc is at rest, the connection with the cam shaft is interrupted. In order to locate the mould disc properly in opera- 0 tive position, it is secured in that position by means of pins located in the machine frame. It may happen, however, that during its rotation the mould disc becomes turned beyond the required extent, and in order to prevent this, it is customary to fit the mould disc driving shaft with a brake.

It has been found that trouble arises through the unusual wear and tear to which the brake is subjected and it is dificult to adjust it in a proper manner in order to obtain on the one hand the correct braking action and to prevent on the other hand excessive wear and tear.

The present invention is intended to overcome these difiiculties, and to this end there is provided according to the invention, a locking mechanism operated from the main cam shaft of the machine whereby the disc is located in operative position.

The drawings illustrate by way of example one construction form of the invention and in the said drawings:

Figure 1 is a diagrammatical side elevation of the pertinent parts of a typographical slug casting machine according to the invention partly in section;

Figurev 2 is a front elevation of Figure 1; and

Figure 3 is a portion of Figure l drawn to a larger scale.

In carrying the invention into effect in one convenient manner as shown in the accompanying drawings, a mould disc a mounted on a fore-andaft movable mould slide a and carrying the mould b in the usual manner, is provided with four bushings c two of which, in the operative position, are adapted to engage two pins (riot illustrated in the drawings mounted on the vise frame and capable of determining accurately the position of the mould disc. The mould disc is rotated by a pinion d adapted to engage an external toothing on the mould disc a, and mounted upon a shaft e. The hub of the pinion f is outwardly bevel-shaped.

A double lever h, n is pivotally mounted about a stud 9' on the mould slide a. The upwardly extending arm it of the said lever carries at its extremity a tooth 1' adapted to engage in the position illustrated in Figure 2 the toothing of the mould disc a, and thereby lock the latter. The said lever is pressed into locking position by a spring is mounted between the lever and a bracket m fast to the mould slide a. The second arm n of the lever which, as shown in Figure l is cut away in the rear, is located beneath the front end of a lever 72 pivotally mounted about the stud 0 on the machine frame, said front end of the lever 1? extending horizontally for a sufficient dis tance to maintain its engagement with the arm n in either the forward or the retracted position of the mould slide (1 The extremity of the second arm of the said lever 10 is provided with a roller q running upon a cam disc s mounted on the main shaft 1' of the machine. The cam disc .9 is of general cylindrical shape and is provided with two recesses. The roller q is held against the by means of a spring t.

Further, the arm; n of the angle lever is provided with a lug u adapted to bear against the bevel-shaped hub f of the pinion.

The mode of operation of the mechanism described is as follows:

When the mould disc 0; is at rest, it is locked by the tooth 2' which is held in engagement with the toothing of the mould disc by the spring is. At the beginning of the operative cycle the roller q is forced out of the recess 8 of the cam s, r

and the forward extremity of the lever 1) thus acts against the lever arm n and forces the latter downwards against the action of the spring is. The angle lever 71, n is thus swung anti-clockwise and the locking tooth i is lifted out of engagement with the wheel teeth. It is now possible for the mould disc to rotate in the customary manner, but at the end of the first partial rotation the roller q drops into the second recess 3 of the cam a. The tooth i is brought once more into the locking position and the mould disc is locked in its proper position wherein the bushings c are directly opposite the pertinent pins on the vice frame and are able to engage them when the mould slide 0. moves forwardly to press the mould into contact with the composed line prior to the slug casting operation. After the pins have brought the mould disc into alignment and the casting has taken place, the continued rotation of the main shaft causes the locking action of the tooth i to be again released and the mould disc is able to continue its rotation until it is once more locked by the tooth i at the end of the second partial rotation.

When it is desired to pass from one mould to another, the mould disc must be turned by hand to the required extent, viz. deg, deg, or 270 deg. For this purpose, as in known machines, the pinion d is pulled forward by means of the handle 11 in order to disconnect the pinion from the main driving mechanism of the machine, the pinion d remaining in mesh with the mould disc and being turned by means of the said handle until the mould disc reaches its fresh position of adjustment.

When the pinion d is pulled forward by means of the handle 0 in the embodiment of the invention being described, the bevelled portion 1 of the pinion slides over the lug u. on the lever arm n, and causes the said lug and therefore the lever arm n to be depressed. The tooth z is thus lifted out of engagement with the mould disc (1 and so long as the pinion d is pulled forward, the rotation of the mould disc can be effected in the customary manner. When the pinion d is pushed back into its initial position the spring 10 again locks the mould disc by means of the tooth i. The locking tooth i is preferably so constructed that when it engages the toothing of the mould disc, it simultaneously adjusts the latter relatively to the pins engaging the bushings c, in case the mould disc after being turned has failed to reach its proper position.

It should be understood that the invention is not restricted to the particular constructional details illustrated, but may be carried into effect with other constructional means. Thus the mould disc may be provided with a locking abutment adapted to come into engagement with a lug on the locking lever h or the control of the locking lever h, 77, instead of being carried out by a special cam, may be performed by any other periodically actuated part of the machine.

These and various other modifications may be introduced in order to carry the invention into effect under different conditions and requirements which have to be fulfilled without departing from the scope of the invention.

Having described our invention we declare that what we claim and desire to secure by Letters Patent is:

l. A typographical slug casting machine comprising a mould carried by an intermittently actuated mould disc and means controlled from a periodically actuated part of the machine for positively locating and locking said disc directly in operative positions.

2. A typographical slug casting machine comprising a mould carried by an intermittently rotatable mould disc and means controlled from the main cam shaft of the machine for positively locating and locking said disc in operative positions.

3. A typographical slug casting machine comprising a mould carried by an intermittently rotatable mould disc having a toothed periphery and a pawl, controlled by a periodically actuated part of the machine, to engage directly with said disc teeth and thereby positively locate and lock said disc in operative positions.

4. A typographical slug casting machine according to claim 3 wherein said pawl is moved about its pivot by a lever actuated by a cam on the main cam shaft of the machine.

5. A typographical slug casting machine according to claim 3 comprising a spring urging said pawl into tooth engagement with said disc, and a lever system operated from the main cam shaft of the machine adapted to release said pawl from engagement, against said spring action,

when the said disc is being rotated, and to allow reengagement under said spring action when the disc has rotated to the desired operative position.

6. A typographical slug casting machine comprising a plurality of moulds carried by an intermittently rotatable mould disc, means for locating and locking said disc in operative positions suitable for one of the moulds carried thereby, manually operable means for adjusting said disc in order to bring any one of the moulds therein into use, and means for automatically releasing said disc-locking means when said disc-adjusting means are brought into operation.

'7. A typographical slug casting machine comprising a plurality of moulds carried by an intermittently rotatable mould disc, power-driven means for transmitting an intermittent drive to said disc, which power-driven means are manually disconnectable from the power drive while remaining in driving connection with said disc, in order to allow manual adjustment of said disc to bring any one of the moulds thereon.

into use, and means for locating and locking said disc in operative positions in respect of the mould in use, which locking means are automatically released from locking engagement when said power-driven means are disconnected from the power drive.

8. A typographical slug casting machine comprising a rotatable toothed mould disc carrying a plurality of moulds, a pinion having toothed engagement with said disc and being normally connected to a power drive but releasable therefrom, when desired, while remaining in toothed engagement with said disc, a pawl adapted to engage said disc teeth in order-to locate and lock the disc in operative positions and means for releasing said pawl from locking engagement with said disc when said pinion is disconnected from its drive. A

9. A typographical slug casting machine according to claim 8 wherein said pinion is axially movable for disconnection from its drive and has a cam surface whereby, upon such axial releasing movement, it efi'ects disconnection of said pawl from said locking engagement.

10. A typographical slug casting machine according to claim 8 wherein said pawl is normally controlled in its disc-locating and locking functions by the main cam shaft of the machine.

' CHRISTIAN AUGUSTUS ALBRECHT.

HERMANN BRANDENBURG.

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