US2029976A - Pump stop mechanism for typographical line casting machines - Google Patents

Description

Feb, 4;, 1936. P. WUNSCH 2,029,976

PUMP STOP MECHANISM FOR TYPOGRAPHICAL LINE CASTING MACHINES Filed May 5, 1934 lllllllllllllln Patented Feb. 4, 1936 UNETE STATES PATENT FFICE PUMP STOP MECHANISM FOR TYPOGRAPH- ICAL LINE CASTING MACHINES Application May 5, 1934, Serial No. 724,042 In Germany May 19, 1933 11 Claims.

This invention relates to pump stop mechanism of typographical line-casting machines. In mechanism of this kind it has already been proposed to lock the pump lever by means of a pump stop lever, controlled by a member of the machine, such as one of the vice jaws or justification rods, actuated during justification of the line, so that actuation of the pump is prevented when the composed line is not properly justified. It has also been proposed to prevent the actuation of the pump when the metal-pot mouthpiece is not bedded closely against the mold, so as to avoid so-- called squirts or splashes which would otherwise occur.

The object of the present invention is to provide improved means for preventing the actuation of the pump either when the line is not properly justified or the metal-pot mouthpiece is not properly bedded against the mold.

To this end the invention 'provides a simple attachment which can be used conveniently in conjunction with existing pump stop levers controlled by the justification mechanism, said attachment constituting secondary control means for the pump stop lever actuated by the movement of the metal-pot mouthpiece, thus making the actuation of the pump dependent upon the close bedding of the metal-pot mouthpiece against the mold.

The invention may be applied conveniently to a. pump stop lever which is normally held in active position to lock the pump, and is moved to inactive position to release the pump when one of the line-clamping or so-called vice jaws, during justification, contacts with the free end of the pump stop lever. In so applying the invention, the secondary control means include a spring loaded lever adapted to hold the pump stop lever in active position, through a preferably adjustable stop, and a slide actuated by the movement of the metal-pot mouthpiece which withdraws the stop against the action of its spring, said spring being stronger than a'spring which is interposed between the vice jaw and the pump stop lever. Consequently the pump stop lever can be pushed into the releasing position by the pressure of the vice jaw only when the said adjustable stop is withdrawn as the metal-pot mouthpiece is bedded closely against the mold.

the metal-pot mouthpiece a The pump stop mechanism comprises a projection b on one side of the pump lever 13 and a pump stop 0 which is in the form of a lever pivotally mounted at c on the machine frame. One arm of the said lever c is adapted to engage beneath the projection 17 and its other arm is operatively engaged by a lever d (hereinafter termed the pump stop lever) which is pivotally mounted on the machine frame at al At the free end of the pump stop lever d is mounted a laterally projecting abutment e, which is in the form of a plunger having a rod which passes through an opening in the lever d. A spring 1 tends to push the abutment away from the lever d and a nut g is used to limit its stroke. When a line of matrices M, held between the vice jaws h, h is justified, the right-hand vice jaw 71. comes into engagement with the abutment e in the manner heretofore proposed. If the line has been sufficiently justified, the abutment e is pressed 20 outwardly, thereby rocking the pump stop lever d anticlockwise and the lever c clockwise (as viewed in the drawing) into the position shewn, for releasing the pump lever b. If, on the other hand, the line is not sufiiciently justified the pump will remain looked, as the levers c, at will be kept in the locking position by the action of the spring 0. The spring 1, throughwhich the outward movement of the abutment e is transmitted to the pump stop lever d, must be suificiently powerful, without being com-pressed, to overcome the pull exerted by the spring c when the pump lever b is released.

According to the invention, the customary stop 01 provided on the pump stop lever d is adapted to rest against an adjustable stop It provided on one arm of a lever i. The lever i is adapted to rock about the pivot i which is affixed to a part of the machine, preferably the vise frame, which is stationary during the casting operation. In the constructional form illustrated, this lever, and the parts connected thereto are carried by a plate 111. which is attached to the vice frame, for example by screws: such as m The second arm of the lever i is connected by a link nto one arm of a lever 0 which is pivoted at o to the plate m. The second arm of the lever o bears against a slide p mounted in a guide q on the plate m. The angularly bent front end of the slide 10 carries an abutment screw T, which bears against the metalpot mouthpiece, or against a stop which is provided thereon or on the pot itself. A spring 8 acting between the lever i and the plate m normally holds the stop is in contact with the stop d on the pump stop lever d.

The spring 8 is stronger than, the spring 1, and the stop is is so adjusted that the spring s holds the lever d in the pump-locking position.

The device above described operates as follows:

At the commencement of the operative cycle of the machine, the pump lever b is locked by the lever c. When the line is justified in the first elevator, the vice jaw h presses against the abutment e and endeavours to unlock the pump lever. As, however, the spring 8 is stronger than the spring no unlocking movement takes place and the vice jaw it merely compresses the spring When the metal pot comes to bear against the mold just before the casting operation, the pot will act against the abutment screw 1".

When the metal pot reaches its forward terminal position the clockwise turning movement imparted to the lever 2' by the slide p through the lever 0, against the action of the spring 8, will have been sufficient to release the lever d which is then rocked by the spring f to unlock the pump.

Consequently the pump will remain locked either when justification is not properly effected or when the metal pot fails to reach its foremost position. In the latter case, proper justification which would otherwise release the pump, merely compresses the spring 1. The proper bedding of the metal-pot mouthpiece when the line is not properly justified, will cause the lever i to release the lever d which will nevertheless be held by the spring 0 in the locking position, as the abutment c and spring 1 do not become operative.

The constructional form of the invention above described and illustrated in the drawing is taken as a convenient example, and it is to be understood that variations therein may be made without departing from the invention. For instance, the slide and leversmay be replaced by other motion transmitting devices such as gear wheels, rack bars and the like.

Having described my invention, I declare that what I claim and desire to secure by Letters Patent is:

1. In a typographical line-casting machine having a metal-pot mouthpiece movable into and out of contact with the mold, the combination with a. pump stop lever and means actuated during justification of a composed matrix line adapted to control said lever to release the pump stop, of secondary control means for the said lever actuated by the mold contacting movement of the metal-pot mouthpiece to release the pump stop.

2. In a typographical line-casting machine having a metal-pot mouthpiece movable into and out of contact with the mold, the combination with a pump stop lever normally held in position to lock the pump, and a member movable during justification of a composed matrix line adapted to actuate said lever to release the pump, of a locking device for said lever, and means controlled by the movement of the metal-pot mouthpiece towards the mold adapted to release said locking device.

3. In a typographical line-casting machine having a metal-pot mouthpiece movable into and out of contact with the mold, the combination with a pump stop lever yieldingly held in pumplocking position, a vice jaw movable by the justiiication of a composed line to actuate said lever to release the pump, a yielding abutment on said lever adapted to be engaged by the vice jaw, a stop member normally locking the pump stop lever against actuation, and means actuated by the movement of the metal-pot mouthpiece towards the mold to withdraw said stop member.

4. In a typographical line-casting machine having a metal pot mouthpiece movable into and out of contact with the mold, the combination with a pump stop lever, a spring constantly tending to hold said lever in pump-locking position, and a vice jaw movable by the justification of a composed line to actuate the pump stop lever, of an abutment carried by the pump stop lever adapted to be engaged by the vice jaw, a spring interposed between the abutment and the lever of a strength greater than that of the pump-stop lever spring, a stop-member normally preventing actuation of the pump-stop lever by the vice jaw, a spring of a strength greater than that of the abutment spring adapted to hold said stop member in active position, and a lever actuated by the movement of the metal-pot mouthpiece towards the mold adapted to move the stop member to inactive position against the action of the last-named spring.

5. In a typographical line-casting machine having a metal-pot mouthpiece movable into and out of contact with the mold, the combination with a pump stop lever, a spring constantly tending to hold said lever in pump-locking position, and a vice jaw movable by the justification of a composed line to actuate the pump stop lever, of an adjustable abutment carried by the pump stop lever adapted to be engaged by the vice jaw, a. spring interposed between the abutment and the lever of a strength greater than that of the pump-stop lever spring, an adjustable stopmember normally preventing actuation of the pump-stop lever by the vice jaw, a spring of a strength greater than that of the abutment spring adapted to hold said stop member in ac tive position, and a lever actuated by the movement of the metal-pot mouthpiece towards the mold adapted to move the stop member to inactive position against the action of the last-named spring.

6. In a typographical line-casting machine having a metal-pot mouthpiece movable into and out of contact with the mold, the combination with a pump stop lever normally active to lock the pump, and means actuated during Justification of a composed matrix line adapted to move said lever to inactive position to release the pump, of secondary control means for the pump stop lever comprising a stop member normally held in active position against the pump-stop lever, a slide actuated by the movement of the metal-pot mouthpiece, and motion-transmitting connections from the slide to the stop member adapted to move said member to inactive position when said slide is actuated by movement of the metalpot mouthpiece towards the mold.

'7. In a typographical line-casting machine, a combination according to claim 6 and wherein the secondary control means are mounted on a plate attachable to the machine frame.

8. In a typographical line-casting machine, the combination with a pump stop lover, a spring constantly tending to hold said lever in pumplocking position, and a vice jaw movable by the justification of a composed line to actuate the pump stop lever, of an abutment carried by the pump stop lever adapted to be engaged by the vice jaw, a spring interposed between the abutment and the lever of a strength greater than that of the pump-stop lever spring, a stop-member normally preventing actuation of the pumpstop lever by the vice jaw, a spring of a strength greater than that of the abutment spring adapted to hold said stop member in active position, and a lever actuated before the casting operation by the movement of a periodically operated part and adapted to move the stop member to inactive position against the action of the last-named spring.

9. In a typographical line-casting machine, the combination with a pump stop lever, a spring constantly tending to hold said lever in pumplocking position, and a vice jaw movable by the justification of a composed line to actuate the pump stop lever, of an adjustable abutment carried by the pump stop lever adapted to be engaged by the vice jaw, a spring interposed between the abutment and the lever of a strength greater than that of the pump-stop lever spring, an adjustable stop-member normally preventing actuation of the pump-stop lever by the vice jaw, a spring of a strength greater than that of the abutment spring adapted to hold said stop member in active position, and a lever actuated before the casting operation by the movement of a periodically operated part and adapted to move the stop member to inactive position against the action of the last-named spring.

10. In a typographical line-casting machine, the combination with a pump stop lever normally active to lock the pump, and means actuated during justific'ation of a composed matrix line adapted to move said lever to inactive position to release the pump, of secondary control means for the pump stop lever comprising a stop member normally held in active position against the pump-stop lever, a slide actuated before the casting operation by the movement of a periodically operated part of the machine, and motiontransmitting connections from the slide to the stop member adapted to move said member to inactive position when said slide is actuated by the movement of the periodically operated part.

11. In a typographical line-casting machine, a

combination according to claim 10 and wherein 20 the secondary control means are mounted on a plate attachable to the machine frame.

PAUL WUNSCH.

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