US2706553A - Typographical casting machines - Google Patents

Description

April 19, 1955 RossE'rTo TYPOGRAPHICAL CASTING MACHINES Original Filed Sept. 2, 1950 5 Sheets-Sheet l /VVE/V TOR Br m/MWA VORNE April 19, 1955 L, ROSSETTO 2,706,553

TYPOGRAPHICAL CASTING MACHINES Original Filed Sept. 2, 1950 3 Sheets-Sheet 2 i /NVENmH er c ,c WA WOR/V555 l.. RossETTo 2,706,553

April 19, 1955 TYPOGRAPHICAL CASTING MACHINES I5 Sheets-Sheet 5 Original Filed Sept. 2, 1950 /NVENTOR United States Patent O j 2,706,553 TYPoGRAPnIcAL CASTING MACHINES Louis Rossetto, Kings Point, N. Y., assignor to Mergenthaler Linotype Company, a corporation of New York Original application September 2, 1950, Serial No. 183,033. Divided and this application August 21, 1952, Serial N0. 305,621

2 Claims. (Cl. 199-53) This application is a true division from application Serial No. 183,033, filed September 2, 1950, which relates to an improved quadding and centering device for typographical casting machines.

The present invention is directed to a dual pump stop control for such quadding and centering devices. When the machine is conditioned for regular operation, the pump stop is controlled as usual by a mechanical element actuated by an outward yielding movement of the right hand jaw. When, however, the machine is conditioned for a quadding or centering operation, the pump stop is controlled by an electrical element mounted in the left hand jaw and actuated by an inward or quadding movement of either one or both of the jaws. Means are provided for automatically disabling the electrical element when the machine is conditioned for regular operation, the purpose being to rely alone upon the mechanical element at such times because of line justifying and other problems. The exact arrangement and operation of the parts will best be understood from the detailed description to follow.

Referring to the drawings:

Fig. 1 is a side elevation of the casting mechanism of a Linotype machine as equipped with the present pump stop control;

Fig. 2 is a front view of the left-hand vise jaw, partly in section;

Fig. 3 is a top plan view of the pump stop control device;

Fig. 4 is a detail view of the hand lever for the machine conditioning mechanism; and

Fig. 5 is a circuit diagram illustrating the operation of the pump stop control device.

A line of matrices X (Fig. 3) is composed in the usual manner and transferred into a vertically movable line transporter or rst 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 distribution. The first elevator then is lowered and finally 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 coopcrate 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 are movable toward and from each other by a vertically movable control rod, not shown herein but which is fully shown and described in the parent application above identified. This control rod may be connected to either or both of the two vise jaws or disconnected from both by the operation of a hand lever 56 attached to a long shaft 57 forming part of the machine conditioning mechanism. The hand lever 56 is equipped with an indicator 59 to be used in association with a dial 60 to aid 2,706,553 Patented Apr. 19, 1955 thei operator in making the various settings of the control ro Inasmuch as quadding with the right-hand jaw and regular machine operation are the settings most used, the hand lever 56 is provided with a slidable stop member 61 which can be conveniently actuated by the thumb. When the stop member 61 is in the up-position (as shown in Fig. 4), it is adapted to limit the movement of the lever 56 between two outstanding pins 62 (one of which is shown in Fig. 5) so that th-e operator can shift the lever from one setting to another by a flick of the finger. The stop member 61 can be moved to the down or inoperative position when centering or left-hand jaw quadding is to be performed.

In the regular operation of the machine, the jaws 4 and 5 are relatively immovable and the line of matrices justified therebetween by expansible spacebands. Inasmuch as the molten metal from the melting pot 51 is forced into the mold under considerable pressure by means of a pump plunger 63 (see Fig. 1) through a spring-operated cam-controlled bell crank lever 64, it is extremely important that the line be fully expanded between the jaws to prevent squirts As a conventional safety measure to prevent the above-mentioned condition, the more or less horizontally disposed arm of the bell crank lever 64 is provided with a projection 64a (see Fig. 3) under which a pivoted pump plunger stop 65 is normally adapted to rest. If the line has been sufliciently expanded during justification, the right-hand vise jaw 5 will yield slightly and, through a contact set screw 66, actuate a pivoted lever 67 to withdraw the stop 65 from the path of the projection 64a. While this safety attachment is satisfactory for regular machine operation, it is not entirely satisfactory for quadding and centering operations, and particularly quadding and centering operations involving the closing movement of the right-hand jaw which leave the pump plunger stop active. For these latter operations, therefore, an electrical safety device controlled from the left-hand jaw is provided. Thus, the stop 65 is adapted to be released by the operation of a rotary solenoid or equivalent electrical element 69. For this purpose, as shown in Fig. 5, a voltage supply is tapped off a transformer 72 and converted into direct current by a rectifier 73. The left-hand vise jaw 4 has a spring-pressed plunger 68 built into it (Fig. 2), and when sufficient pressure is exerted by the jaw on the line of matrices, the plunger is caused to yield to close a switch 74 (also built into the jaw 4) to complete the necessary circuit for the energization of the solenoid 69 to release the pump plunger stop. Obviously, if the pressure exerted by the jaw 4 against the line is not sufficient to close the switch 74 it would be unsafe to cast and, consequently, the circuit is not completed.

As shown in Fig. 5, a switch 70, normally open for regular machine operation, is interposed in the circuit for the left-hand jaw safety device. Said switch is adapted to be closed by the rotation of a cam 71 mounted on the long shaft 57 which is operated by the hand lever 56. When the control rod is set for quadding or centering, the switch 70 will be closed, thereby conditioning the circuit to effect the energization of the solenoid 69 when the switch 74 of the left-hand jaw is closed. On the other hand, when the control rod is set for regular machine operation, the switch 70 is opened and the release of the pump plunger stop 65 will be effected by the right-hand jaw 5, the left-hand jaw safety device being rendered inoperative.

The invention has been shown and described in preferred 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.

What is claimed is:

1. In a typographical casting machine equipped with a pump stop, the combination of a pair of line clamping operation, a mechanical element controlled from the right-hand jaw for releasing said stop when the machine is conditioned for regular operation, an electrical element controlled from the left-hand jaw during quadding for releasing said stop, and means actuated by the machine conditioning means for disabling said electrical element when the machine is conditioned for regular operation.

2. In a typographical casting machine equipped with a pump stop, the combination of a pair of line clamping jaws movable one toward the other in quadding, means for conditioning the machine for quadding or for regular operation, a mechanical element controlled from the righthand jaw for releasing said stop when the machine is conditioned for regular operation, an electrical element for releasing said stop, an electric circuit for the elec- 15 2,035,076

trical element including two control switches, an actuating member carried by the left-hand jaw for closing one o said switches during a quadding operation or a regular machine operation, and means actuated by the machine conditioning means for closing the other of said switches during a quadding operation and for opening said switch during a regular machine operation.

References Cited in the le of this patent UNITED STATES PATENTS 989,943 Bedell` Apr. 18, 1911 1,534,710 Hopkins Apr. 21, 1925 2,029,952 Stouges Feb. 4, 1936 Kingsbury Mar. 24, 1936

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