US1061562A - Pump. - Google Patents

Description

Y. E. PIERPNT.

PUMP.

APPLICATION FILED HABA, 1912. 1,061,562. Patented May 13, 1913,

ff/C'. 03 CZ inventan lilhllillll@ titrtw tti Pitfifllilhlrl @iffflt FRANK Hlfililtftllil' PIEMONT, Oftp HORLEY, COUNTY 0l SURREY, ENGLAND, ASSIGNOR T LAM'STON MONOTYPE Mi'tCHlNE COMPANY, 0F PHILADELPHIA, PENNSYLVANIA,

A COMOMTION OIF VIRGINIA.

PUMP.

racines.

Specification of L'etters Patent.

latcntcd Muy 13,11913.

Application tiled March f1, 1912. Serial No. 681,425.

To all whom it may concern Be it known that ll, Farini; l'linnaw Pmnrow'r, a citizen of the United States, temporarily residing at Salford, .Hoi-ley, in the county of Surrey, England, have in vented a certain new and useful Improvement .in or Relating to Pumps; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, and to the iigures and letters of reference marked thereon. v

This invention relates to pumps for type casting machines and refers particularly to pumps which are intermittently connected with or applied to the type mold.

The nozzle through which the molten metal is delivered to the mold is usually tapered or pointed and therefore lends itself to rapid cooling, hence it frequently happens that in the interval between the casting strokes of the pump the metal solidilies in the nozzle and the pump is rendered inoperative. Further, metal overflows at the tip of the nozzle and solidiies there, thus preventing the nozzle seating perfectly against its seat inthe mold. lt is `the chief object of this invention to minimize or eliminate entirely these drawbacks.

According to the present invention, the pump nozzle is provided with one or more channels, chambers or jacketed portions through which some o t the metal which is forced up by the pump piston is passed or circulated in such a manner as to warm up or heat the nozzle and thereby prevent metal solif'lifying on the outer side ihcre of or in the main ejecting channel. 'lhe rcturn outlet from the channels, chambers or jacketed portions may be controlled conveniently by a valve or tap.

The invention will be described as applied to a pump nozzle of well known. form, it heilig understood that the invention is by no means restricted to this or to' any particular pump nozzle.

In the accompanying drawings illustrating a preferred form of embodimcntMthc figure :represents a vertical section of a pump nozzle contaiiiiing said invention.

A is the discharge branch leading from the pupap barrel.

is the nozzle, and (i a controllingj tup.

The nozzle B in thc present example is formed in two parts one of which b is screwed, or it ma;F he otherwise secured, in the 011tlet of the discharge branch of the pump. The other part o which forms the nozzle proper, or that part which is seated against the mold opening and is provided with the discharge outlet b, is screwed or otherwise secured to the part 'b so thatbetwcen these two parts b and b there exists a space or chamber B. The part Z) is provided with a channel Z13 communi :ating at its lower end with the bore a in the branch A, andthe outer end of this channel b3 discharges into the space li in line with and contiguous to the jet opi-ning b2 in the part of. As indicated in the drawings the area of b3 is greater than that of the jet opening b2.

Leading from the lower portion' of the chamber B is a conduit or a convenient number of conduits'B2 which serve for the return or discharge of metal delivered into the chamber B.

On the delivery stroke of the pump the `m'etal'is forced up through the channels. a,

b3, and out by the .jet opening b2 into the mold in suilicient quantity to fill the mold and with sufficient pressure to produce solid type. The superfluous metal delivered by the pump passes into the space or chamber B thereby imparting heat to the nozzle, and this metal is returned from the chamber B by the passage or passages B2 back to the metal pot. The extra heat imparted" to the nozzleby this metal prevents it cooling down to an extent which might permit metal to solidify in the nozzle or on the outer walls thereof as aforesaid.

C is a tap or cock inserted in the return passage Bf by which metal from the ell-.unbcr B is returned to the metal pot, and by turning the handle C of this tap, the llow of the metal from the chamber B back to the metal pot can be reffulatcd at will. For convenience the cock may be provided with a pointer C2 acting in conjunction with the scale or index Ca to facilitate al ready adjustment of the opening of the cock.`

What I claim is:

it nozzle for metal injecting pumps provided `with a jet opening, a metal Supply passage terminating in rear of thojet opening to form a chamber in rear of said jet opening, a discharge passage for said chamber,v and an adjustable valve in said discharge passage for varying or adjusting `the rate of discharge therethrough.

to provide a metal receiving chamber Within the seating section surrounding the discharge end of the main section, the latter also provided with a discharge passagecoml5 municating With said metal receiving chamber.

FRANK HINMN PIERPONT.

Witnesses:

H. D. JAMESON, O. J2 -WORTPL

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