US1250803A

US1250803A - Casting or molding device.

Info

Publication number: US1250803A
Application number: US11897516A
Authority: US
Inventors: Edward G Cook
Original assignee: COPPER PRODUCTS Co
Current assignee: COPPER PRODUCTS Co
Priority date: 1916-09-08
Filing date: 1916-09-08
Publication date: 1917-12-18
Anticipated expiration: 1934-12-18

Description

E. G. COOK.

CASTING 0R MOLDING DEVICE.

APPLICATION FILED SEPT. 8.191s,

Patented Dec.18,19 '17.'

2 SHEETS-SHEET 1.

W aw .m 2. m

E.'G. COOK.

CASTING .QR MOLDING DEVICE. APPLICATION man SEPT- 8. 191s.

Patented Dec. 18, 1917 2 SHEETS-SHEET 2.

[nuenior [dward 6'. C006.

.cthis; so far as ED STATES OFFIC- f I EDWARD- e. 000K, or LONG Ismnn OITY, New YORK, 'AssIeNon, BY 'MESNE assummnnrs, To corrnn rnonuc'zrs COMPANY, A conromupmn or MAINE.

1,25o,s03. I

To all whom it may concern: 7

Be it known that .I, EDWARD G. COOK, a residing in in th e'c'ounty of Queens ing or Molding Devices, of which the fol-v lowing is a specification.

This invention relates tomolding devices,

for use in the forming from fluid metal of hollow articles of any form without the use of cores, and practically applies to the art of slough-molding, wherein the mold is first completely filled, and when the chilling effect of the 'mold' has solidified the outer surface sufficiently to form a chill or shell while the center is still filled with the fluid metal, this surplus still fluid central portion of the metal is allowed to flow out, and

I am aware, has been heretofore only brought about either by inserting a trochar through the mold and the chillf,

ice the 'still fluid central portion of the article being foimed, and allowing-the surplus-metal to, flow out through the puncture S0 made; or in some cases, by inversion of v the mold so as to permit such surplus to drained off, through a tom. 7 v When one solid casting of lead, etc was; 'used for such mold, certain serious disadvanby making the flow out through the sprue. In my im-' proved form of molding apparatus,*herein shown, there is no trocharing, or-inversion the mold beingstationary, and the flui metal. enters, and the central surplus is tages'were presented, among which were theamount of the metabused for a mold, theresuch an extent that the shell castthereon harden and cool the mold after it has been formed, and then also on account of .the extra time required topour the 'great' quan-T .tity of-lead both when formin and 'when supplying the origina source". .v

In view of the foregoingdisadvantagesif one of the main objectsof the presentin-,;-"

} Specification ofLetters Patent. 1 Application filed september 8, 1916, I Serial N o.

, of comparatively sprue at the .bot-

' even-when 1n their solid state proposition a rather expen *sive one; the fact-that. the solid metal cast-. ing on being melted out would'expand to metal wax, or

fmaterial, capable of beingflusedinany case ;v '95 I a I I n F I 1 l I vent1on-1s to prov de an easily fus ble mold of electro-conductive materiahsuch as lead, I

or its alloys, etc.,' that is comparatively inexpensive to manufacture on account of its light weight and the short length of time -necessary tog make, and that will very effectively serve'for. producing light shells formed thereon by electro-deposition .without any" dangerwhatever of fracturing or destro ing the shells being produced.

To his end I have provided an. appara? tus ofla new-and improved type, whereirr a65, hollowmale mold, is quickly molded from lead, or a'lloysthereof, etc., upon which, metal of higher fusion point may 'be electrolytically deposited, after which, the mold of lead, etc,., .may be easily removed-bysubmitting-the same to a fusive heat.

Broadly considered, my improved apparatus herein, shown, described and claimed, comprises means-wherebyfa cast-iron, or

other suitable female-mold, .receives the L5 I molten lead ,'or other metal, alloyor mate-. I rial; chills the portion coming in contact with the walls of the mold cavity to :form a thin shell; and'whereby the. remaining still molten centralmetal portion is quickly 3 removed from the. cast-iron female m0l'd,. thereby leaving a. thin shell of lead, etc.

My said apparatus is more especially adapted and desi ed for use in the formav tion of articles 0 low fusion point, that,

at ordinary v temperatures, they are somewhat soft; and; while metalslike lead or its al1oys,by reason of low fusing point are particularly adaptable for the purpose of making such hollow articles,

my apparatus may be used with advantage in forming the same of any like suitable substance-or such or Instance; as casting .art1cles o f' metals'fusible at lowtemperatures such, as

'thatoffboiling water, (212 F .),as do the alloys used in thermostatic-trips inautoA.

niatic fire extinguishing apparatus, fusing i at 15 fallo sjof' s' milar; character, of low fusion y a p rticularly'adaptable for use in forming male v :niolds used asbases for electrogdeposition to 'formacompl'etedfarticle; and. 1 1 e etc. T Lead and-other metals, or

point, and electric conductivity,

thereon,

Patented Dec ls, 19 17.. I

metals or other materials 85 disclosed, I have not described herein, as the same is fully shown, describedand claimed in my co-pending application Serial No. 118,974, filed September 8th, 1916, simul{ taneously herewith.

The present invention further contemplates the provision, of means whereby only.

" the better grade -of molten lead is conveyed I i he I t0"the mold, also means whereby the opera- .tor' is immediately notified. when the cast iron mold is filled with the required amount of molten lead; means whereby the lead can be quickly shut ofi when the ne qhired amount has been supplied; and means whereby the active conduits. can be quickly drained of their contents when the operation is to cease,

thereby to prevent the constipating of the apparatus by the hardening of the lead in such conduits'during the time that the apphratus is ,not'in use. I

When making lead molds a factor to be considered is the great shrinking qualities of lead, and-the shrinkage would, of cburse, be

'more pronounced the greater the mass of.

metal used, In view of this characteristic, due to" the small quantity of lead used for the large stmolds, the present invention sets forth the manufacture of amold in which distortion, due to shrinkage, is a negligible quantity. a V

It is also to be noted that when Very large molds are 'made, if these should be -made ofa 'solidlumpfof metal," great difliculty would be experienced in retaining the shape ofthe same. The foregoing difficulty is entirely overcome by the present shell formed mold.

\ The present invention further contemplates the provision of a mold makingdevice in which, the supplybfmetal and the withdrawal of the surplus metal from the i mold forms is entirely dependent upon the .force of gravity, no exterior force being i .which forming moldQwill be removed from the supply source of moltenlead and be of '60 suflicient thickness so that heat received from required, whereby the manufacture of such molds is kept down to"a minimum. The present invention still further contemplates the provision of a cast iron form--- ing mold for receiving the molten lead,

the molten lead will be comparatively small I and quickly dissipated thereby to present a comparatively cool forming mold forsu'ccessive operations.

neaosoe These and other features, capabilities and advantages of the invention will appear from the subjoined detail description 'of one specific embodiment thereof illustrated in the accompanying drawings, in which- Figure'l is an elevational view partly in section showing the apparatus in positionfor supplying the mold forming mold.

Fig. '2 is a similar elevational view partly in sectionillustratingthe apparatus, in pos1-.

tion for permitting the discharge of the surplus metal after the shell has been formed.

Fig. 3 is a fragmental sectional view' showing the resulting shell formed by the present apparatus still positioned in the appa- "ratus. A

Fig. 1 183, fragmental elevational view on the line 44 of Fig. 1. v

Fig. 5 is an enlarged sectional view on the line 5-5 ,of Fig. 2.

Fig; 6 is a-perspeotive view of one form of shell detached from the apparatus after having been formed thereby. I

' In the embodiment illustrated there is provided a suitable lead melting pOt lO haV ing anannular housing 11 for the reception of the molten metal and a central fire passage 12 at the bottom of which the combustion bed ortorch 13 is disposed. To the -outer wall ofthe housing 11, and secured to the upper portion thereof, is formed the hood 14 terminating at its upper end the flue or chimney 15. The housing 11 1s supported in any desired manner, usually by being bolted or htherwise secured to a bracket 16, by bolts or other means not shown, which bracket'is usually secured to the annular downwardly and inwardly inc-lined bottom-plate 17, through the center of which passes the vertical fire-passage or heating-flue 12, below which is located the burner 13, which flue ,12 communicates at the top with the escape chimney- 15. Ex-

tending downward from the annular bottom-plate 17, and in communication with the interior of the melting-pot so formed, is the molten metal feeding conduit 18, forming the initial portion of the conduit for conveying the molten metal to the mold hereinafter to be described. The conduit 18 preferably conveys the metal from the housing '11 to the mold hereinafter to be described. The conduit 18 preferably extends downward a considerable distance in.

a straight vertical line and then turns oif at an angle, preferably 90 degrees to said straight portion, terminating in the portion 19 which is externally and internally screw threaded. Engaging the internal screw "threads of the portion 19; and thereby secured to such. portion 19'. is the, bushing 20 which has a seat 21 for the reception of the bearing '22. Engaging the external screwthreads of the portion 19 is a collar portion 1,25o,eos

23 which engages the bushing 20 and extendsover the bearing 22, thereby reinforcing the several parts to properlyv support the bearing 22. The bearing 22 has a bore in alinement with the bore of the bushing and has a semi-circular flange 24 on its lOWer side to receive the free end 25 of-the goose-neck pipe connection 26, the bore of which two end 25 is in alineme'nt with and substantially of the same dimension at its free end as the bores of the conduit 18, bushing 20, and bearing 22. The free end 25 has a loose connection with the bearing 22 to permit its ready removal when desired, and also to permit its ready'rotation relative to and on such bearing 22. The

pipe connection 26 isprovided with an angle jusbbeyond the free end 25, continulng for.

a considerable 'distance from such angle in the substantially straight'downwardly extending-portion 27 which terminates in the large-belly portion 28 at its lower end, and which pipe connection 26 maliesanothen turn terminating in the upwardly rising portion 29' which extends upward a comparatively short distance to terminate in the short'end port-ion 30 secured to the pivotal block 31.' The

portions

25, 27, 29 and 30 of thepipe connection 26 are substantially of the same here: dimension as the bore dimension of the conduit 18, but the belly portion 28 ,is of considerably greater di-, mension to-form a reservoir for the recep- 'tlon' of the heavier and: better grade of metal, this belly portionv 28 forming the lowest 'level of the system to which the moltenrnetal can flow before reaching the mold. Since dross and the inferior grades of mtals se'ek the highest levels, the belly portion 28 will thus form the depository of 4 the finally refined metal and in addition by itsconformation afford a final-opportunity for the dross to'separate out before themetal is permitted to rise up through the

portions

29 and 30 to the mold, the greater diameter of the belly portion 28 tending to retard the flow of the metal and thereby permitting any dross that may have been carried to this mold level to separate out and rise before passing into the portions 29 a and 30. 3

The pivotal block -31, as shown in Fig.

I 4, is substantially pear-shaped in outline,the"

portion '30 of the pipe-connection 26 being secured to the enlarged p0rtion 32 of theblock 31, and the upper diminished portion 33-of the block 31 being provided with a Y pivotal pin opening 34for the reception of the pivotal pin 35, which is provided with a head 36; against which the spring 37 will be strained for mz'tintaini ng,the pin 35 infplace; The'spring 37 is p votally connected 'to such block'3l to P61911111? the same to.be-

' swung away from the head-\36 to facilitate the remov'aljofthe, pin 35 when desired. 7

connection. 26 when such pipe connection 26 :is disposed with its" belly portion 28 extendoperating with the fixed portion 38 of the .above' the extension 48.

55 is provided one end of which'is may beactuated with facility.

The opening 34, and the pin 35 when disposed therein, are axially in aline'ment with the portion 25 of the pipe connection 26.' i As forming the forming mold for the ap-' paratus, there is provided the fixed cast iron portion 38' provided-with the standard 39. by I means of which the portion'38 is disposed to; approximately the same level as the hearing 22. I The outer portion of the mold half 38 is provided with an orifice 40 which is axially in alinement with the bearing '22 and adapted to receive the pin 35. When the pipe connection 26 and block '31 arethus positioned, they will be free to rotate about a line passing through the axis of the. bearing 22 andorifice 40. The portion 38 is pror vided with a diminished passageway or sprue 41 horizontal in diiction and disposed in alin'ement with the portion 30 of the pipe ing downwardly. The passageway orsprue 41 'formsa communication through the portion 38 to the mold depression 42'formed in the-inner side'of said portion 38. For co-.

forming mold is the "movable portion {43 which is provided

wit ribs

44 and 45 extending into the guide'ways46 and 47 formed in the

extensions

48 and 49, respectively, of the portion 38', the extension 48 being the upper portion of the standard 39 andthe extension 49' being spaced therefrom and The portion 43 is movably mounted between the extensions 48' and 49',and is provided with'a mold depression 50 forming the "other half for the depression 42 and 'coiiperating therewith to riseror guide; opening 54 passing through v,the upper portion of the mold portion 38,

with one. another.

For actuating the portion 43, the screw ed to the portion. 43 and the body portion of the portion 38 and portion 43 cooperating which meshes with the screw threaded opening 56 :formed' in the cross piece 57 extending from the extension '48 to the extension 49'. .The screw 55 is provided with acrank- 58 at its -outer-free endwhereby the same I For draining oil the contents of duit 18-, pipeqconnection 26, and

formlng mold portions

38 and 43 when the work is to be stopped for'a'ny length of time, the stop 1 2 5' cock'59 is providedin theconduit 18, there,

by firstto .cut off any further supplv of metal to the conduit lS and connection 26, and the stop-cock 60 is vided in the.

consequently the pipe.

p'rothe ,coni i elly portion 28, m that is 1111116 lee i lower portion of the belly portion 28 when such belly portion 28 extends downward, by

' means of which stop cock 60a ,discharge may be provided through which the contents of the conduit pipe 18, pipe connection 26 and

mold forming portions

38 and 43 may flow into the receptacletil' disposed below such discharge for receiving such contgnts.

The diameter of the bores of the conduit 18 and pipe connection 26 is much greater than the diameter of the bore of the assage way or sprue 41. It has'been f0 nd that muchthe purer and better grade of metal when molten, especially molten lead, will be carried in the core or central part of a flowing stream. By the foregoingarrange- 7 the mold, phonograph horn elbows efliciently, quickly, and cheaply; and one of such fiIl-' merit, the-central portion or core of the molten lead will thus be drained from the.

ished electro-deposited horns is shown in v1? 6 at 62; and the same differs from. the male-molds formed in this device, only in thatf in the molds the orifice 62 is closed by a web.

The. operation of the present device is substantially as follows: Assuming that the lead pot 10 is \filled with metal, and the burner has been started and the lead molten,

-the pipe connection 26 positioned with its portion 25 seated in the bearing 22, its belly 28-exte1rding downwardly, and the pin 35 spring pressed in the openings 34 and- 40, the portion 43 driven in tight against the portion 38 by the screw and the stop cock shut ofl,then uponopening the stop cock 59 the molten lead will flow down through the conduit 18, pipe connections 26,- 27 and 28 and throughthe sprue passageway;

'41-up into the forming mold-cavity 4250,

formed by such depressions in the mold por-'

tions

38 and 43 until the operator notices,

through the riser 54, that the

mold portions

38 and 43 are entirely full, whereupon the operator 7; immediately swings up the pipe,

connection 26 about bearing22' and the pin 35, whereby the opening from the :portion 30 wilYbe cut ofl, this by the face of the -mold portion 38, as illustrated in Fig. 2, and the free end of the passageway 41 exposed so that the still fluid contents ofthe central I portion of the mold willflow outand discharge into the receptacle 61. The lead flowing out, of course, is only that port-ion which has not beenchilled to form the shell desired, it being understoodthat only a Very to cut of]? the metal between successive operations.

form L g molds.

molds 38-and 43. Then the operator, while the pipe connection 26 is still in its raised position, will quickly draw the mold portion. 43, from the mold portion 38 and when so drawn away a sufiicient distance by the ass'istance of a hook or other means suitable for the purpose, the resulting shell may quickly be removed from the portion-38;

The stop cook 59, after the operation has i once been commenced, and for successive op:

erations, will not be turned until it is desired to stop the operation of the apparatus for any length of time, the cut-off occasionedby the cooperation of the mold portion 38 with the pipe portion 30 sufficiently serving 30 When, however, it isdesired to stop the operation of the apparatus forany length of time then the stop cook 59 is turned to cut off the supply of metal thereto and the pipe connection 26'swung down, and then the stop cook 60 opened 'to permit the metal contained in the conduit, pipe connection 26 and

mold portions

38 and 43 to flow there- Q from into the receptacle 61.

The length of the conduit 18 and pipe 'I I connection-26 is determined according to the length of drop required from the meltingpot 10 to produce the best grade of metal required, the drossand inferior metal seeking the highest level and thus the greater the drop the better the grade of metal produced at the'lowest level.-- v

For disconnecting the pipe connection 26 from the apparatus for the purpose of clean ing, repair or the like, it is only necessary to swing the spring 37 out of the way'of the pin 35, remove such pin 35 and then raisethe pipe connection 26 upwardly.

From the foregoing arrangement it will be seen that the present system of lead pot 10, conduit 18 and pipe connection 26 readily adapts itself to feed any size mold desired,-

and that all that would be necessary for 3 As appears from the illustrat1on,ca1e must be exercised to locate the forming molds at a level considerably lower than the lead melting pot, this for the purpose of obtaining a great drop from the lead melting pot to the belly portion to facilitate the effective rise 'of the dross and inferior metal, and the differ ence in level also being conducive to obtain a, high velocity of the, molten metal when, flowin from the lead melting pot to the erever 1n, the description or in the claims l; have frequently used the word 'leadf Ido' not intend in any case to limit myself-strictly to such 'nleta l, but intend to -cover thereby, any fusible metal, alloy or material suitable to be used incasting articles of the type described. J It is obvious that various changes and modifications ma} be made to the details of" construction. without departing from the 'generalspiritof the invention,

I clalmz 1. A leadf'mold making device comprising we source of molten-metal or lead supply, .a forming mold, a conduit from the source of supplyto the forming mold, the source of supply being disposed ata level abovethe forming mold so that the lead may flow '15 from said source of supply to said forming,

mold and the dross and lower grades of metal bepermitted to rise and separate from the; higher grade of metal before the lead reaches the forming mold, means for indieating to the operator when the forming mold has been filled, and cut-ofi means for.

. cutting pfi' the feed of lead to saidforming mold when the forming mold ha s'been' filled to permit the discharge from said forming "mold of. all of the lead'that has not been 'chilled'in the forming mold. l

2. A lead mold making device comprising a source of molten-metal or lead supply a forming mold, a conduit from the source of 89 supply to the forming mold, the source of supply being disposed at a level. above the formingmold so that the lead may flow from said source of supply to said 'sforming mold and .the dross and lower grades of metal be permitted to rise and separate from the higher "grade of metal before 'the lead reaches the forming mold. means. for indi-.

eating to the operator when the forming mold has been filled, and means for cutting go off the feedof lead to'said forming mold and forming adischarge from saidformin mold whereby the surplus'lad not chilled therefrom. v I

3. A lead moldmaking device comprising a source of molten-metal or lead supply, a forming mold, a conduit sectionfixed to said source of'supply and extending downwardly therefrom, and a pivotally connected pipe i0 connection pivoted between said fixed con-' duit section'and said forming mold, the pipe connection in one position forming a com- ,munication from said fixed conduit to said forming-mold to permit the lead to fiow i5 from the source of supply to said forming mold and in another passage of lead. r 4. A lead mold making device comprising a lead vmelting pot, a forming mold, a con- 0 duit section fixed to'said melting pot and" extending downwardly therefrom, 'a-p iv-- otally connected pipe connection pivoted between said fixed conduit section and said forming mold, there being a passage said a source ofcmolten-metal or lead supply, a

position cutting off the forming mold, the pipe connection in one position forming-a communication from said fixedconduit to said passage to permit the lead to flow from said lead pot to said forming mold and in another position to cut oil the passage of lead to said passage and open said passage so that the'surplus lead in said forming mold may discharge therefrom. 5. A lead mold making device comprising a lead melting pot, a forming mold, a con: duitf section fixedto said-melting pot and "extending .d6wnwardly therefrom, a ivotally connected pipe connection 'pivote between' said fixedconduitsection and said forming,mold,.tliere being a passage in said forming mold, the pipe connection in one position forming acommuncation from saidfixed conduit to'said passage to permit the lead'to flow fro'm'said lead ,pot to said form-' ing moldand in another position to cut ofl the passage of lead to said passage and open said passage so that the surplus lead in said forming mold may discharge therefrom, the' passage in said forming mold being of less diameter than the bore ofsaid pipe connec-j tionan'd conduit section so that only the high grade m tal which seeks the center-or core of the bdl e will be conveyed into said forming. mold.

6. "A lead mold making device comprising a source of molten-lead supply, a forming mold, a conduit section fixed to said source of supply-and extending downwardly there- ;from, and a pivotally connected pipe connec-' I said forming mold. and .when extending up-" 'in the forming mold may be discharged Wardly cutting off the passage of lead to said forming mold. I 7. A lead 'mold making device comprising forming mold; a conduit section fixed t6 said source of supply and extending downwardly therefrom, and a pivotally connected pipe connection-pivoted between said fixed conduit section and said forming mold, the} pipe connection being in the form of a gooseneck loop and when the loop' extends .downwardly forming a communication from said fixed conduit tosaid forming mold topermit the-lead to flow from said source of supply to said'forinin mold, and when extending upwardly cuttmgofi' the passage of lead tov saidforming mold, the middle of said loop ,having a greater bore diameter than the bore diameter'of the remaining portion of the loopso that when said loop extends downwardly such enlarged bore portion will serve as a reservoirto facilitatethe further refinement of the high grade of oted between said fixed-conduit section and the forming mold; a mold sprue; the pipeconnection being in the form of a goose-neck loop,. which when the loop extends downwardly forms a communication between said fixed-conduit and the mold sprue, to permit the molten metal or material to flow from the melting-pot to the forming-mold, and

when the loop extends upwardly cuts ofi the passage of the same to said forming-mold, and thereby opens the'sprue, soas to permit the surplus central unsolidified metal or material to flow by gravity out through the sprue.

,9. A lead mold making device comprising a source of molten-metal or lead supply,

'a formingmold, a conduit section fixed to said source of supply and extending downwardly therefrom, a pivotally connected pipe connection pivoted between said fixed conduit section and said forming'mold,'the

pipe connec ion being in the form of a gooseneck loop and when the loop extends downwardly forming a communication from said fixed conduit to said forming mold to permit the lead to flow from said source of supply to said forming mold", and when extending upwardly cutting ofi' the passage of lead to said forming mold, and a removable connection between said loop and said fixed conduit and forming mold whereby said loop can with facility be removed.

10. A lead mold! making device comprising a source of molten-metal orlead supply, a forming mold, a conduit section fixed to said source ofsupply and extending downwardly therefrom, a pivotally connected pipe connection pivoted between said fixed conduit section and said forming mold, the pipe connection being in the form of a gooseneck loop and when the loop extends downwardly forming a communication from said fixed conduitto said forming mold to permit the lead to flowfrom said source of supply to said forming mold and when extending upwardly cutting off the passage of lead to said formingmold, a valve in said fixed conduit whereby when the operation is to be ESE stopped the supply oflead may be out 0d,.

and a valve in the middle of the loopwhereby when the loop extends downwardly all of the lead contained in said-fixed conduit, loop and forming mold maybe discharged. 11. A lead mold makingdevice comprising a source of molten-metal or lead supply, a forming mold, a conduit section fixed to said source of supply and cg downmenses wardly therefrom, apivotally connected pipe connection pivoted between said fixed conduit section and said forming mold, the pipe connection being in the form of a gooseneck loop and when the loop extendsfldownwardlyforming a communication from said fixed conduit to said forming mold to per-' mit the lead to flow from said source of supply to said formin mold and when extending upwardly cuttlng oil the passage of lead to said forming mold, a removable connection between said loop and said fixed conduit and forming mold whereby said loop can with facility be removed, the removable connection comprising a semi-circular seat on-said fixed connection permitting the free removal of the loop upwardly therefrom, a

pivotal block to which the other end of the loop is fixed, and a removable pin for pivotally securing the block to the forming mold. v 12. A lead mold making device compris ing a source of molten-metal or lead supply, a forming mold, a conduit section fixed to said source of supply and extending downwardly therefrom, a pivotally connect-- ed pipe connection pivoted between said fixedconduit section and said forming mold, the pipe connection being in the form of .a goose-neck loop and when the loop extends downwardly forming a communication'from said fixed conduit to said forming mold to permit the lead to'flowfrom said source of supply to said forming mold and when extending upwardly cutting off the passage of lead to said forming mold, a removable connection between said loop and said fixed conduit and forming mold whereby said loop can with facility be removed, the removable connection comprising a semi-circular seat on said fixed connection permitting the free removal of the loop upwardly'therefrom, a pivotal block to which the other end of the loop is fixed, a removable pin for pivotally securing the block to the forming -mold, and a spring for maintaining said pin in securing position. f

13. A molding device comprising a molten-metal or lead supply-source; asplit forming-mold located at a lower level than said supply-source; a closed conduit fdr convey ing the molten metal from the source to the forming-mold, communicating therewith through a sprue at the bottom, such mold beingcomposed of readily heat dissipating metal so that a chill or-shell will immediately be formed when the molten metal is introduced into the mold, through contact with the walls thereof, whereupon the still molten metal located in the center of such upon the opening of the sprue-passage.

14. A lead mold making device comprising, a source of molten-metal or lead supply, a forming mold at a lower level than said chill or shell, may be discharged, by gravity I source of supply, a closed conduit for con veying lead from said source of supply to said forming mold communicating therewith through a sprue at the bottom, said forming mold comprising a fixed section and a movable sectionboth composed of readily heat dissipating metal so that a chill will immediately be formed when the lead comesin contact with the walls of the sections and 4 the, remaining lead be discharged to leave a shell mold.

15. A lead mold making device comprising a source of molten-metal or lead supply,

a forming mold at a lower level than said source of supply, a closed conduit for con-' veying lead from said-source of supply to said forming mold communicating therewith through a sprue at the bottom, said forming mold comprising a fixed section and a movable section composed of cast iron of great thickness so that a chill will immediately be formed when the lead, comes in contact with the walls of thesections and the remaining lead be discharged and leave a shell, the cast iron rapidly dissipating the heat to leave the sections in effective condition for thenext operation. l

16. A lead mold making device comprising a source of molten-metal or lead supply,

a forming mold at a" lower level than said source of supply, a closed conduit for conveying lead. from said source of supply to said forming mold communicating therewith through a sprue at the-bottom, there being a riser opening at the top of said 'forming mold to indicate to the operator when the said mold is full, and means for cutting of]? the passage to said forming mold when the same is full:

17 A lead mold making device c'omprisin a source of molten-metal or lead supply, a iorming mold at a lower levelthan said source of supply, a closed conduit for conveying lead from said source of supply to i said forming mold communicating therewith througha sprue at the bottom,- said forming mold comprising a fixed section and a mov able section, parallel extensions on said fixed section between which the movable section is guided, and means for actuating said movable section when desired.

18. A lead'mold making device comprising a source of molten-metal or lead supply,

a forming mold at a lower level than said source of supply, a "closed conduit for conveying lead from said source of supply to said forming mold communicating therewith through'a sprue at the bottom, said forming mold comprising a fixed sectionand a movable section having mold depressions 'coing-pot, a forming-mold located at a lower level than the melting-pot; a substantially vertical closed fixed conduit-section in com-' 'munication with the melting-pot, and extending downwardly therefrom; a pivoted pipe-connectio pivoted between the fixed conduit-section'and the forming-mold sprue 7 located at the bottom thereof, the pipe connection in one position forming a-communi cation between the fixed-conduit section and the mold-sprue, so as to then permit the molten metal or material to flow from the melting-pot to such mold, and toenter the same at the bottom; and in another position to cut off thefiow to the sprue, and at the same timeto open the sprue so as to allow the still fluid metal onmaterial in the center of the body being formed to" flow by gravity out from the 'sprue.

, EDWARD e1 COOK.

Witnesses:

GUSTAV DREWS, I H; D. PENNEY.