US999513A - Machine for casting type. - Google Patents

Description

A. E. MILLER.

MACHINE FOR CASTING TYPE.

APPLIOATION IILED MAY 20, 1909.

Patented Aug. 1, 1911.

4 SHEETS-SHEET 1.

I A. E. MILLER. MACHINE FOE CASTING TYPE.

APPLICATION FILED MAY 20, 1909.

999,513,, 1 Patented Au 1,1911.

4 SHEETS-SHEET 2.

arwanfoz A. E. MILLER.

. MACHINE FOR CASTING TYPE.

APPLICATION FILED MAY 20, 1909. &5 1 3 Patented Aug. 1,1911.

4 SHEETS-SHEET 3.

111mm W 6; W

A. E. MILLER.

MACHINE FOR CASTING TYPE.

APPLIOATIQN FILED MAY 20, 1909.

' Patented Aug. 1,1911.

4 SHEETSSHEET 4.

SAS

ANDREW E. MILLER, OF BALTIMORE, MARYLAND, ASSIGNOR TO NATIONAL .COMPOSI- TYPE COMPANY, OF BALTIMORE, MARYLAND, A CORPORATION OF DELAWARE.

MACHINE FOR CASTING TYPE.

Specification of Letters Patent.

Application filed May 20, 1909. Serial No. 497,203.

To all whom it may. concern:

Be it known that I, ANDREW E. MILLER, of Baltimore, in the State of Maryland,

have invented certain new: and useful Im duction of meansfor simplifying the construction of the pump casing.

A further object is to improve the construction of the pump nipple and the choker. valve operating therein.

A further object is to provide improved means for actuating the pump plunger and choker valve in time with each other.

The invention will be hereinafter fully set forth and particularly pointed out in the claims.

In the accompanying drawings :Figure 1 is plan view of a port-ion of a type casting machine with my invention applied thereto. Fig. 2 is a transverse sectional view on the line 2-2, Fig. 1. Fig. 3 is a similar View on the line 3-3, Fig. 1. Fig. 4 is a side elevation. Fig. 5 is a sectional View of the pump and its adjuncts, parts being shown in section. Fig. 6 is a detail View of the main pump operating lever. Figs. 7 and 8 are detail plan and side views, respectively, of the pump latch lever. Fig. 9 is a detail view of the choker-operating lever. Fig. 10 is a detail of the pump-andchoker-operating lever. Fig. 11 is a modification of the pump. Fig. -12 is a View illustrating the cam mechanism. Fig. 13 is a detail thereof.

Referring to the drawings, designates the base of a type casting machine, and 21.

the mold mechanism, which may be of any suitable or preferred construction. Saidbase is provided with parallel supporting bars 22 on which is slidingly mounted the metal pot 23, thelatter being provided with an adjusting screw 24 engaging the end of one of the bars 22, whereby the position of the metal pot may be adjusted with relation to the mold mechanism.

The metal pot 23 is provided with shouL ders to which are secured the supporting ears 31 of the pump casing 32. Said casing comprises a piston chamber 33 and an eduction chamber 34, the latter being ofl"- set laterally from the piston chamber and preferably cast integral therewith. The body of the pump, between said chambers, is provided with two diverging conduits 35 which lead directly from the piston chamber 33, the outer ends of said conduits being closed, preferably by plugs 36. The eduction chamber communicates with said conduits 35 by means of channels 37. The bottom of chamber 33 is closed by a threaded plug 38. The pump plunger 39 is provided with a spherical socket 40 to receive the correspondinglyshaped head 41 of the plunger rod 42, ,said rod being held in position by means of a threaded bush-ing 43, as shown. In this manner a universal joint is provided between the plunger 39 and the rod 42, thereby insuring a free movement of the plunger and obviating all probability of binding by reason of any lateral deflec tion of said rod. The upper end of the eduction chamber 34 is exteriorly threaded to receive the nipple member 44 which is provided with an eduction port 45 and a valve seat '46. the channels 37 discharging within said nipple member above the said valve seat 46. Within said chamber 34 is located the choker valve comprising a stem or shank 47 provided with a tapered port-ion 48 terminating in a cylindrical projection 49 adapted to fill the port 45, the end of said control the discharge of molten metal. The

tapered portion 48 of the choker is provided with longitudinal grooves or channels 51. The choker is operated by one arm 52 of an angular choker-lever 53, said lever being pivotally supported by an offset portion 54 of the pump c'aslng. The arm 52 is projected through an opening 55 formed in the wall of chamber 34, and is pivotally securedin a slot 55 formed in the shank 47.

Projecting upwardly from one edge of the metal pot 23 are arms or standards provided with bearings 61 for a main rock shaft 62. Said arms or standards also serve to support a second shaft 63. Secured to the rockshaft 62 is .a' pump-and chokeroperating lever 64, and on the shaft 63 is mounted a pump-latch-lever' 65. Said 1evers are connected by a link rod 66, having a slot 67 to receive the pivot pin carried by a head 68 of the pump-latch-lever 65, and

forked at its lower end 67 to engage the pin 69 mounted in the slottedend 7 0 of the lever 64. Said lever 65 is provided with a latch-engaging arm 71 arranged at an angle to that portion which carries the head 68. Theupp er end of the pump-plunger-rod is secured to the head 68 at 72, and said head is held normally depressed by means of a spring 73 coiled around shaft. 63 and bearin against a shoulder 74.

The arm 52 of the choker-operating lever 53 is providedwvith a latch engaging portion 75 and adjacent thereto is mounted a roller 76 which is normally engaged by a projccting cam portion 77 of the pump-andchoker-operating lever 64. The rock-shaft 62 is provided with an arm 78 which is connected by a pitman 7 9 with a crank 80 operated in an suitable maimer, preferably from the main drive shaft of the machine, Mounted on the rock shaft 62 is,a latchmember 81 provided with two latch- arms 82, 83, the former being arranged to engage the latch-engaging ortion 75 of arm 52, and the latter engaging thearm 71 of lever 65. The latch argtn 82 is provided with a lug or shoulder 8 adapted to be engaged 'by. the shouldered end of an operating link 85 which is reciprocated by a suitable rock shaft 86 located on the opposite side of the meta.lqpot-., The arm or link 85 extends .across the top of the mold portion of the -machine,'"thereby necessitating the disconnectionythere of from the latch mechanism,

before the mold parts can be lifted out, thereby rendering the molten metal mechanism inoperative before the mold can be :11- tered in any manner. A dental spurts Gui 1110117811 metal are pre-- In this way accivented. The link 85 is disengaged from .the lug or shoulder 84 by means of an upwardly extended finger 87 carried by the pump-and choker-operatjng lever 64.

- In Fig. 12 I have shown the crank 80 as secured on one end of the main drive shaft '90, and on said shaft is loosely mounted a cam member 91 which is provided with a gear 92 driven by a suitable pinion not shown and connected with any suitable source of power, the same being substan:

tially the structure illustrated and described in my pending application filed J anuary 16th, 1908, Serial Number 472,680. In the present case the cam member 91 is loose upon the shaft 90, and adjacent the gear 92 is placed a collar 93 secured to said shaft and provided withan arm 94, said arm in turn being provided witha curved, slot arranged to receive a set screw or the like 95 carried by said gear. By this arrangement ,the position of the, crank 80 with relation to the cams carried by the member 91 can be adjusted for the purpose of more accurately timing the operation of the various parts.

In the operation of the machine, the spring 73 tends to force the pump plunger 39 to its lowermost position. The latch arm 83, however, being normally in engagement with the arm 71 holds the lever against the tension of said spring, there by maintaining the pump plunger in its raised position. At the same time spring 88 acting against the arm 53 normally tends to retract'the choker-valve fr'om the eduction opening 45, said opening being normally closed, however, by reason of said arm 52 being held against the tension of its spring by means of the latch member 82. The operationof the parts is so timed that the latch member 82 is first disengaged from the arm 52 of the choker-lever, permitting the opening of the eduction port, the valve 50 resting against seat 46 to prevent leakage around stem 47, and immediately there after, so soon in fact as to be almost simultaneously, the latch 83 is disengaged from arm 71, permitting the spring 73 to force the pump plunger downwardly, whereupon the molten metal is ejected through the nipple opening 45. By this time the arm 78 has rockedthe shaft 62, and as a result, the

headed end 68 of lever 65 is raised by means of rod 66, thereby raising the pump plunger and bringing the arm 71 back into pos1 tion to be engaged by the latchmember 83, the latter being rocked at the-proper time to effect such engagement. As the lever 65 moves upwardly, the cam portion 77 thereof engages the roller 76, rocking the lever 53 in a direction to close the port or opening 45, and bringing the said lever into engagement with the latch-member 82. In this preferred structure, and is not illustrated.

Within the eductionchamber 34 is located a choker valve-provided with. a stem 47: having at its lower'e'nd a valve 48 adapted to rest upon a seat 49. A movable collar 50 is also mounted on said stem and held normally against a stop pin 51 by means of a spring 52. The valve seat 49 is arranged at the end of an induction passage 53 formed in the bottom of the casing 32op-f posite chamber 34, said passage communi eating with the conduit 35. The bore of plunger ascends the valve 48 is raised permitting the metal to flow through passage 51 into the conduit the nipple being closed in the usual manner. When the plunger descends, the valve 48' closes the passage 53 and the molten metal flows through the channels 55 to the nipple, Where it is discharged. In this manner. an eflicient pump is provided, the same being constructed to take the molten metal in at a low level.

I claim as my invention l. Moltenmetal mechanism for type casting machines comprising a pump provided with a plunger and a plunger rod, a pivoted member, means for pivotally connecting said plunger rod with said pivoted member, a spring acting on said pivoted member, means for moving said pivoted member in opposition tosaid spring, locking means adapted to engage saidpivoted member after such movement, and means for periodi cally disconnecting said pivoted member and .its locking means, whereby the plunger Will .be operated.

" :2. Molten metal mechanism for type castingma'chines comprising a pump provided with a'plungerand a plungerfrod, a pivoted latchj member, means for, pivotally connecting said plunger rod with one end of said latch member," a' spring acting on said latch member, means'for engaging thefr'ee end of said latch member to hold the plunger normally retracted in opposition to said' spring, and means .for periodically disengaging said latchmember from its holding means, where by the plunger will be operated. 3. Molten metal mechanism for type cast-v ing machines comprising a pump provided with a plunger and a plunger rod, a pivoted latch member, means for pivotally connect. ing said plunger rod with one end of said latch member, a spring acting on said-latch member, a pivoted latch for engaging said latch member to hold the plunger normallyretracted in opposition to said spring, and means for periodically disengagin said latch from said latch member, where y the plunger will be operated. I

4. Molten metal mechanism for type casting machines comprising a pump provided with a plunger and a plunger rod, a rock shaft, a latch member secured thereto, connections between said latch member and said plunger, a springencircling said rock shaft, means for engaging said latch member'to hold said plunger normally retracted in op &

position to said spring, and means for periodically disengaging said latch member and its holding means, whereby the plunger will be operated.

5. Molten metal mechanism for-type casting machines comprising a pump provided with a plunger and a plunger rod, a pivoted member, means for pivotally connecting said plunger rod with said pivoted member, a spring acting on said member, a rock shaft, a latch carried thereby adapted to engage said pivoted member, and means for periodically operating said rock shaft to disengage said latch, whereby the plunger will be operated.

6. Molten metal mechanism for type cast ing machines comprising a pump, a plunger for ejecting molten metal from said pump, means for exerting a constant pressure upon said plunger, means for holding the plunger normally retracted in opposition to saidpressure, means for periodically releasing said plun er, and independent means for moving said plunger to rengage said holding means.

7. Molten metal mechanism for type casting machines comprising a pump, a plunger for ejecting molten metal from said pump, a spring actuated latch lever connected with said plunger, means for holding said lever normally retracted in opposition to the spring pressure, means for periodically releasing said latch lever, and independent means for moving said latch lever to reengage said holding means.

8. Molten metal mechanism for type casting machines comprising a pump, a plunger for ejecting molten metal from said pump, a spring actuated latch lever connected with said plunger, a latch member for engaging said latch lever, means for periodically disengaging said latch member from said lever, and means for moving said latch lever to reengage said latch.

-9. Molten metal mechanism for type casting machines comprising pump mechanism including a reciprocating choker valve, a choker lever, a spring acting on said lever to unseat said valve, means for movingsaid lever in opposition" to-the spring, pressure, locking means adapted to eifgagesaid lever after such movement, and meansiorperiodically disengaging said locking means .from

including a reciprocating choker valve, a choker lever, a spring acting on said lever to unseat said valve, means for holding said lever normally retracted in opposition to the spring pressure, means for periodically operating said holding means to free said choker lever, and means for automatically moving said choker lever to reengage said holding means. a

, 12. Molten metal mechanism for type casting machines comprising pump mechanism including a choker valve, a spring actuated choker lever, a latch member adapted to engage said lever to hold the same normally retracted, means for periodically disengaging said latch member from said lever, and independent means for moving said lever to reengage said latch member.

- 13. Molten metal mechanism for type casting machines comprising pump mechanism including a choker valve, a V choker lever, means for holding said lever normally retracted in opposition to the spring pressure, means for periodically disengaging said latch lever, and a cam member adapted to move said lever to rengage said holding means.

14:. M lten metal mechanism for type casting machines comprising pump mechanism including-a choker valve, a spring actuated choker lever, a latch member adapted to hold said lever normally retracted, means for periodically disengaging said latch member from' said lever, and a cam member adapted to move said lever to ree'ngage said latch member. a 1 v 15'. Molten metal mechanism for type casting machines comprising pump mechanism including a pump plunger and a choker valve, a sprlng actuated latch lever connected with said plunger, a spring actuated choker lever connected with said choker valve, a latch member provided with arms engaging said latch lever and said choker lever, and means for actuating said latch member to successively disengage the latch' arms from said choker lever and said latch lever.

16. Molten metal mechanism for type casting machines comprising pump mechanlsm including a pump plunger and a choker A for engaging said latch lever and said choker lever, means for actuating said latch member to successlvely release said chokerlever and said latch lever, and means for moving said choker lever and said latch lever to reengage said latch member.

17 Molten metal mechanism for type casting machines comprising pump mechanism including a ,pump; plunger and a choker valve, a spring actuated latch lever conspring actuated- I ing also provided with means 1 nected with said plunger, a spring actuated choker lever connected with said choker valve, means .for holding saidlevers normally retracted, means for successively disengaging said choker lever and said latch lever, a rock shaft, and an arm carried by said rock shaft provided with means for moving said levers to reengage with their respective holding means.

18. Molten metal mechanism for type casting machines comprising pump mechanism including'a pump plunger and a choker valve, a spring actuated latch lever connected with said plunger, a spring actuated choker lever connected with said choker valve, a latch member provided with arms engaging said latch lever and said choker lever, means for actuating said latch member to successively disengage said arms from said choker lever and said latch lever, a rock shaft, and an arm carried by said rock shaft for moving said latch lever and said choker lever to reengage said latch arms.

19. Molten metal mechanism for type castng machines comprising pump mechanism including a pump plunger and a choker valve, a sprlng actuated latch lever connected with said plunger, a spring actuated choker lever connected with said choker valve, means for holding'said levers normally retracted, means for successively disengaging said choker lever and said latch lever from said holding means, a rock shaft, and an arm carried by said rock shaft and connected with said latch lever,,s'aid arm be c. engaging said choker lever. 20. Molten metal mechanism for type castng machlnes comprising pump mechanism includlng a pump plunger andacholzr-r valve, a spring actuated latch lever connected with sald plunger, a spring actuated choker lever connected with said choker valve, means for holding said levers normally retracted, means for successively disengaging said chokerlever and said latch lever from said holding means, a rock shaft, and an arm carried by said rock shaft and connected with saidlatch lever, said arm being provided with an elbow adapted to engage said choker lever.

.21. Molten metal mechanism for type casting machines comprising pump mechanism including a pump plunger and a choker valve, a spring actuated latch lever connected with said plunger, a spring actuated choker lever connected with said choker valve, a latch member provided with arms engaging said choker valve, a latch member rovide with arms engaging said latch ever and said chokerlever, means for actuating said latch member to successively disengage said arms from said choker lever and said latch lever, a rock shaft, and an arm carried by said rock shaft and connected with said latch lever, said arm being provided with means for engaging said choker lever.

22. Molten metal mechanism for type casting machines comprising pump mechanism including a pump plunger and a choker valve, a rock shaft, means for operating said rock shaft, and means carried by said rock shaft for successively actuating said plunger and valve.

23. Molten metal mechanism for type casting machines, comprising pum mechanism includinga pump plunger an a recip- .rocatory choker valve, a rock shaft, means carried by said rock shaft for actuating said plunger and valve, a crank shaft, and rneans operated by said crank shaft for actuating said rock shaft.

24:. Molten metal mechanism for type casting machines comprising pump mechanism including a pump plunger and a choker valve, a rock shaft, means carried by said rock shaft for actuating said plunger and valve, an arm secured to said rock shaft, a crank shaft, and a pitman connecting said crank shaft and said arm.

25. The combination with a mold base adapted to support mold mechanism, of pump mechanism, means for actuating said pump mechanism, a latch member controlling the operation of said pump mechanism, and an operating arm for said latch member extended across the top of said mold base.

26. In molten metal mechanism for type casting machines a pump casing provided with a piston chamber and an eduction chamber, the latter being offset laterally from the former, said casing being provided with diverging conduits leading from the piston chamber to opposite polnts in the eduction chamber.

27. In molten metal mechanism for type casting machines a pump casing provided with a piston chamber and an eduction chamber, said casing being provided with an offset portion, a plunger working in said piston chamber, a choker valve in said eduction chamber, a choker lever pivotally mounted in the offset portion of said pump casing, and means for actuating said lever and said plunger.

28. Molten metal mechanism for type casting machines, comprising pump mechanism including a pump plunger and a choker valve, a rock shaft, means carried by said rock shaft for actuating said plunger and valve, a drive shaft, a crank mounted thereon, means operated by said crank for actuating said rock shaft, and means for adjusting the throw of said crank.

29. Molten metal mechanism for type casting machines, comprising pump mechanism including a pump plunger and a choker valve, a rock shaft, means carried by said rock shaft for actuating said plunger and valve, a drive shaft, a crank mounted thereon for actuating said rock shaft, a gear for driving said drive shaft, and means for turning said drive shaft independently of said gear to adjust the throw of said crank.

30. Molten metal mechanism for type casting machines, comprising pump mechanism-including a pump plunger and a choker valve, a rock shaft, means carried by said rock shaft for actuating said plunger and valve, a drive shaft, a crank mounted thereon for actuating said rock shaft, a gear loosely mounted on said drive shaft, a collar secured to said drive shaft, and means for adjustably securing said collar to said gear.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

ANDREW E. MILLER.

Witnesses:

J. WALLACE BRYAN, WALBER P. HALs'roR-

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