US1762890A - Typographical casting machine - Google Patents

Description

June1 0, 1930. R ROGERS 1,762,890

TYPOGRAPHICAL CASTING MACHINE F Filed Feb. 4. 1929 I 4 Sheets-Sheet- 1' %B i VENTOR ATTO EYI June 10, 1930. J RbGERS 1,762,890

TYPOGRAPHICAL CASTING momma Filed Feb. '4, 1929 4 Sheets-Sheet 2 Jun 10, 1930.

' J. R; ROGERS TYPOGRAPHICAL Filed Fe CASTING MACHINE b. 4,v 1929 4 Sheets-Sheet 5 W MWATTORNEYS June 10, 1930- J. R. ROGERS Q TYPOGRAPHICAL CASTING MACHINE Filed Feb. 4, 1929 4 Sheets-She et 4 Patented June 10, 1930 dorm. a. means, on BROOKLYN;

. TYPE coMrimY, ncoRroRAr oivforf'NEw onK-f rrrroeanrnioar casrrive M CHIN Application filed iebruary '4, 1929. .Seria1.No.337,207. a

This invention relates totyipographical" casting machines, suchlas linotype machines of the general organization represented in- S. Letters Patent to O. Mergenthaler,

436,532, wherein a melting pot is arranged to deliver molten metal into a slottedmold and Lip-against a composed line oi'inatrices to type baror-slug bearingx'on ts produce .a

to the 1nj-.

edge type characters corresponding tagliocharactersof the matrices. In these machines, the molten metalis introduced into the mold by means of a spring-actuated pump piston or 1 plunger arranged Within the pot and controlled in its action by a rotary cam,

which makes one complete revolution for each "cycle oi operation of the machine. The, cam is usuallymade of cast iron and is concentric thruout except at. one point in-its circumferi so iisconnectedidi'rectly ence, depression, which at the proper time permits the plunger to descend under the influence otfitsractuatingspring to fillthezmold with molten metal :Eor the cast; iNormally,,however, the plunger is s'ustainedby the cam in raised or, inactive-position against 'theftension of its: actuating spring thru: the medium of a so-called fpump leverjZTone'arm' of which is providedwi'th anlanti-iric'tion roller bearing against the cam, and the other arm of which the parts are thus arranged, the roller is causedto ride idly upon the camvunder thethe pump actuating constant? pressure of spring for approximately :five-sixths of? each cycle of operation ofv the machinej-(the in-, active period of the-plunger) andjthereb-y subjects the cam toexicessive wear; Thus, in jlinotype machines as ordinarily constructed, the axisyof the anti-friction roller is seldom absolutely true or in parallelism with the cam shaft, and even though it should happen to be accurately positioned at the time of as semblying, normal shrinkage and expansion of the metal in the supporting bracket and adj acent parts, as well as the strains set up therein: .by the pump. spring, .frequently;pre'-- event the proper rollingcontact between the"- thru which molten metal :is forced upwardly by a reciprocating during the casting fille i Q C i -J A a r su h ii u edges of the cast iron cam chip? and break 0E, the tracking surface of the cam often becomes deeply scored, a noisy, and otherwise objectionable;

where, it isformed :with ,Zrecess or tothe' plunger rod. As i V casting me The present invention 1s intended toob-viate these and other difficulties by relieving h 'o h -Pre u e of h rum -a atin 1 spring while the -plunger is inactive. T Q this NEW Y RK, Assamhammer.we

ndv the operation is end, it is proposed to lockrsaid springnon mally out of momentarily, so that it may function-as heretote-re, .at the time of casting ferred embodiment illustrated, the

a m a mployed consists of a trip device stru'ction and arrangement of the parts Will tion to follow 11 pre-i arranged directly beneath-the pump spring lever and The exact conaction and -to;- release it" be best understood from the detaileddescrip-e In the accompanying drawings, the invene tion has been shown merely in preferred form and. by way of example, but obviously many changes and variations may be made. there n and in its Vmodej of application,. which will therefore be understood that the invention 'ment, except 'n so vfar as specified in tlie claims. 4 g Referring tothe drawings 1 is arver'tical section takenjthi u equipped with the present improvements Figs. 2,

lan view ofFig. AL ,and v Fig; 6 is a detailfperspectiveview',showing still be comprised within itsspirit; ns o' di r not limited to any. specific form or embod such limitations are chanismr of a linotype 'machine 3 and tare similar views, showing the parts-1n different relative positions l 7 Fig. 5is a top "the improved trip device on an fenla'rg'edscale.

' In Fig. 1,'the parts are shownirrt'herela- J 'tive position they occupy *after "a composed been justified and lire of matrices has just prior to the commencement of the; casting operation, the slotte'd mold A being closed V thereto by -a so-ca'lled B, and

pot C is formed with a'throatl or passage C I closed-at the rear by 'J of a melting:potGif'Tliej atthe front by the matrix line, whicli is pre- 'sented momentarily fi r'i-J elevator aid '1 i the mouth-piece O G. during the time the horizontal member H operation. The plunger D is connected by means of a rod or link D to the front or free end of a fore-and-aft rocking lever E, which latter is formed at its opposite end with an elongated bearing sleeve E loosely mounted on a transverse rock shaftF. This shaft F is j ournaled in a fixed supporting bracket F and is provided with two arms E E the former carrying an anti-friction steel roller 6 arranged to track upon the periphery of a rotary cam Gfast to the main shaft G and the latter being extended laterally beneath an-. other fore-and-aft lever E keyed or otherwise secured to the rock shaft F. I At the front, the lever E is connected to a long pull spring E which is powerful enough to depress the plunger D and force a charge of metal under high pressure into the mold. Withthis known arrangement,the cam G, being formed with the usual recess G in its periphery, and by reason of its engagement with the roller 6, is capable of controlling the operation of the plunger thru the lever E; and the spring E thru the engagement of the lever E with the arm E is capable of depressing the plunger to carry out the slugcasting operation, the latter operation being permitted when the recess G is brought opposite the roller 6. It will now be seen that, except at the moment of casting, the cam G sustains the pump plunger thruout each machine cycle of operation in its raised or inactive position against the tension of the spring E and since the recess G takes up but a comparatively short section of the cam track, the major portion thereof is constantly subjected to the wear and grind of the pump lever roller 6 under the heavy pressure of the pump spring.

In order to remedy this condition and overcome the difficulties arising therefrom, the present invention provides automatic means for relieving the pump lever of the tension of its actuating spring until just prior to the casting period, so as thus to remove the pres sure of the pump lever roller upon the cam pump plunger is inactive. Such means (as best shown'in Fig. 6) comprises an angular trip dog H, which in the present instance is arranged beneath and in operative relation to the spring-actuated lever E The dog H is centrally pivoted in a fixed supporting bracket J and presents a and an upright member H the latter in the normal position of the dog being adapted to sustain the lever E against the tension of the spring E and when the dog is rocked about its pivotal axis to move out of the path of said lever to permit itS operation. The-rocking of the trip dog H is efi'ected thru its horizontal member H by means of a bell crank lever K'pivotal'ly connected to a rearwardly projecting portion J of the bracket J and arranged to operate in a plane disposed at right angles to the trip do 6ne arm K of the lever K extends forwardly and terminates directly beneath the free end of the horizontal member H of the dog H, where it is confined and restrained against vertical displacement by a lug J formed on the bracket J. This lug is in no way essential to theoperation of the device, but it insures a predetermined position'of 'the'lever K, which is important for reasons .lever K at the proper time. When the lever K is thus actuated, its forwardly projecting arm K is forced upwardly and rocks the trip dog H so as to locate the upright member H clear of the spring lever E the return movement of the dog as well as that of the lever K being effected, after the shoe L passes the finger 72, by a light pull spring H anchored to the frame work and connected ,to the free end of the horizontal member H To facilitate the rocking movements of the trip dog H, the spring-actuated lever ET is raised at the time out of contact with the upright member H this being accomplished by making the customary anti-wear shoe G (employed to form and define the leading end of the recess G slightly higher than here-"' tofore and by adding at the following end of said recess a second anti-wear shoe G of corresponding height. 'Accordingly, immediately before and after the descent of the plunger D (shown respectively in Figs. 1 and 3), the roller 6 will be in contact with first one and then the other of these shoes and, thru the pump lever arm E will support the lever E momentarily clear of the dog H, thus permitting the latter to be rocked out of the path of the lever E while the roller is in contact with the first shoe G and later returned to its original position beneath said lever when theroller is engaged by the second shoe G It is frequently necessary in practice to back up the machine, that is, to turn the cam shaft G by hand in the reverse direction to that in which it normally rotates, and if onsuch occasions the finger It should be engaged by the cam shoe L ,'it would merely be raised about its pivotal axis without disturbing the bell crank lever K. The parts are in this way insured against possible breakage which might otherwise occur while the inc The operation of the parts is, as follows;

In Fig. 4, the machine isshown at rest with v 1 the lever E supported against the tension of the spring E by the trip dog H and the pump lever roller a sustained clear of the cam G by the buoyancy of themolten metal in the pot thru the pump lever E and the intervening connections. This relation ofthe parts remains unchanged until the shoeGr, by rotation of the cam shaft G is brought into contact with the roller 6 (see Fig. 1). By such contact, the rock shaft F is turned a few degrees in a clockwise direction and raises the lever E out of contact with the L on the cam'L engages the finger k on the depending arm K of the bell crank lever K and, as the cam" shaft continues to rotate, pushes the arm K forwardly. The other arm K of the lever K is thus swung upwards 1y against the tension of the spring H I and rocks the uprightmember of the trip dog out of the path of the lever E (Fig.2). The latter is now free, and immediately the recess G is brought opposite the'roller e, the spring E acts thru said lever to depress the pump plunger D in the manner before described. As the cycle of operation progresses, the pump lever E, as well as the spring-actuated lever B are rocked upwardly by the cam track of the recess G and the roller 6 is then .engaged by the shoe G (seeFig'. 3), whereupon the lever E thru the lateral arm E of the lever E, is again lifted slightly further to clear the trip dog H and allow the spring H to return the dog to its original active or looking position beneath thelever E -When the shoe Gr passesbeyond the roller 0, the

lever Etwill come to rest upon the upright member H of the, dog H and thereby relieve the pump lever E, and hence the cam G, of the pressure from the spring E The pump cam G, as herein shown, is'substantially the same in form as the one now used in the standard li'notype machines, but

with the present improvements, it will be obvious that it could be made in the form only suflicient area to embody the recess G v or the other of the camsimme'diately adjacent. In such. case, however, the pump leverE and the spring lever E should preferably be connected in a positive manner so that p the former will be sup-ported by the latter in their raised or inactive positions.

Having thus describedmy invention, what I claim is: I 1. In a typographical casting machine,the

combination of a metal pot, a plunger ar-" ranged to reciprocate therein, a spring or equivalent means for actuating the plunger, and automatic means for locking the spring for actuating said-lever. 1 a r l "ZzjIna typographical casting machine, the

normally out of action and for releasing. it

equivalent meansfor actuating the plunger, a'canl shaft, a rotatable cam mounted thereon for'controlling the operation'of the-plunger,

and means controlled from said shaft for 1 locking the spring normally out of action and 1 forreleasing it momentarily during each rotation of'the cam."-. I 3. In a typographicalcasting machine, the

"combination of 'a metal pot, apump plunger V p. 7 therein, anoperatinglever therefor, a'spr'ing trip dog H. At or about th1s time, the shoe orjequivalent means cormected to the lever for-actuating" the plunger, a rotatable cam for controlling the operation of -said'lever, I and autolnatic ineansfor locking the spring t5 normally outof action and'for-releasing it momentarily during each rotation of the cam. l. In a typographicalcasting-machine, the combination of" a 'metal pot," a plunger ary ranged to reciprocate therein,- a springor' o equivalent means for actuating the plunger, a

cam for controlling the operatiolr-of the plunger,a trip dog movable into and outsof ranged toreciprocate therein, a' springcon- 9 tro'lled lever for; actuating the plunger, a

caIn -for controlling the operation of the 'plungerthru said 1eve'r,-a tripdog-movable into and out of operative position for looking 'said'levernornially out of action, autoimatic 'means for operating the trip dog, and

Y means cooperating therewith for providing --clea ranc ebetweenthe lever and the trip dog toi 'facilit'ate operation of the latter. p g 16. In a typographical casting machine, the -1 {combination 'of a metal pot, a plungerj-arranged to reciprocate therein, a'spring or equivalent means for actuating the plunger,

of a segm nt or segmental Section having I rotatableream forvcontrolhnethe. p w

ofthe'plunger,'a trip dog movable into and f s and might therefore be cast integral with one of Operative 'posrmon for lockmg spring normally out of action, a,leverff or mounted adjacent theplunger control cam,

combinationof'a metal pot, a "'plunger ar-.

ranged? to reciprocate therein, a spring-cone .trolled lever fora'ctuatingthe plunger, a rotatablecain for controlling the" operation '1 25 Y ofthe plunger thrusaid lever, a trip dog movable into and'out of operative position for locking said lever normally out of action, and automatic means for operating the trip I dog, said plunger control cam being provided with a pair of shoes or. lugs arranged to cooperate with said means and adapted during each rotation of the cam'to raise the plunger actuating lever clear of the trip dog to facilitate its operation.

8. In a typographical casting machine, the combination of a metal pot, a plunger arranged to reciprocate therein, a spring-actuated and cam-controlled lever for operating the plunger, and automatic means serving normally to relieve the cam of spring pres sure but operative at each cycle of operation of the machine to release the spring for the casting operation. 9. In a typographical casting machine, the combination of a metal pot, a plunger ar-' ranged to reciprocatetherein, a spring or equivalent means for actuating the plunger to effect casting, an automatic trip device :ggjadapted normally to lock the spring out of act-ion, and means actuated at each cycle of the operation of the machine for releasing the spring for the casting operation.

-10. In a typographical casting machine,

the combination of a metal pot, a plunger arranged to reciprocate therein, a spring for actuating the plunger, a rotary cam to control the operation of the plunger against the tension of its actuating spring, a trip dog for looking the spring norm-ally out of action, a lever for operating the trip dog, a rotary cam for actuating said lever, and intermediate means whereby the latter cam is allowed to actuate said lever only while turning in one 7 1 direction.

11. In a typographical casting machine, .the combination of a metal pot, a plunger arranged to reciprocate therein, a spring for actuating the plunger, a rotary cam to control 401 the operation of the plunger against the tension of its actuating spring, a trip dog for locking the spring normally out of action, a lever for operating the trip dog, a rotary cam for actuating said lever, and a pivoted finger Q carried by thelever and arranged to engage the second cam whereby the latter-is allowed to actuate the lever only while turning in one direction. p c 12. In a typographical casting machlne,

. the combination of a metal pot, a plunger arranged to reciprocate therein, a spring for actuating the plunger, a rotary cam to control the operation of the plunger against the ten- .sion of its actuating spring, a trip dog for looking the spring normally out of action,

and means actuated at each cycle of operation of the machine for operating the trip dog to release the spring for the casting operation. In testimony whereof, this specification has been duly signed by: JOHN R, ROGERS.

Images