US956638A - Car-brass mold. - Google Patents

Description

G. L. HOPFER.

GAB, BRASS MOLD.v

APPLIUATIUN FILED MAR. s, 1909.

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GAR BRASS MOLD.

AAAAAAAA 19N PPPPPP AR. 33333 9. Y 956,638, Patented May 3, 1910.

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GEORGE LINTON KOFFER, OF LAUREL, MISSISSIPPI.

CAR-BRASS MOLD.

Specification of Letters Patent.

Application filed March 3, 1909.

Patented May 3, 1910.

Serial No. #181,0934

To all whom 'it may concern:

Be it known that I, GEORGE L. Homme, ya citizen of the United States, residing at Laurel, in the county of Jones and State of Mississippi, have invented a new and useful Car-Brass Mold, of which the following is a specification.

The principal object of the present invention is to provide an improved mold for casting journal bearings or brasses for car wheel axles to the end that a large number of brasses may be manufactured in a short time.

A further object of the invention is to provide a novel form of mold in which any desired number of sections may be assembled together,-the sections being of precisely the same construction and so arranged that one face of each section shall form the back of the brass while the oppo-site face of the same section shall form the concave journal receiving face of another brass.

A still further object of the invent-ion is' to provide a mold of this type in which the mold sections are provided with interchangeable members for forming the concave journal receiving faces so that brasses of the ordinary Master Car Builders type, or selfoiling, or lead-lined brasses may be made as desired.

With these and other objects in view, as will more fully hereinafter appear, the invention consists in certain novel features of construction and arrangement of parts, hereinafter fully described,'illustrated in the accompanying drawings, and particularly pointed out in the appended claims, it being understcodthat various changes in the form, proportions, size and minor details of the structure may be made without departing from the spirit or sacrificing any of the advantages of the invention.

In the yaccompanying drawings z-Figure 1 is a lon itudinal sectional view illustrating a num er of mold sections assembledin readiness for the casting operation. Fig. 2 is a sectional plan view of the same. Fig. 3 is a sectional plan view of one of the sections showing the same fitted in, lreadiness for the castingof a' self-oiling brass. Fig. 4: is a similar View showing the mold section adjusted in readinessfor the `casting of a Lead-lined brass. Fig. is a' detaiperspective'view looking atrone face vofthe mold section. Fig. 6.is a. similarview looking at the opposite face thereof. V is a :detail perspective view of the convex section employed in the molding of self-oiling brasses. Figs. 8 and 9 are detail views of the members used in the molding of lead-lined brasses.

Similar numerals of reference are einployed to indicate the corresponding arts throughout the several figures of the `rawings.

Each of the main sections of which the multiple mold is built up is of precisely the same construction being of enerally rectangular contour and provided with a vertical central web 10 of practically uniform -thickness except at the top where it is recessed as indicated at 11 to form the rib which is arranged at the end of the brass and in practice is disposed at that end of the brass adjacent the car wheel. The inner or molding surface of the web has small ribs 13 to form a panel which may contain a name plate or other identifyingmarks, and preferably there are a pair of small lugs 14 which extend from the web near the upper and lower ends thereof to form oil passages in the brass, although these are not essential. At the opposite sides of the central web the walls are much thicker as indicated at 14 and the inner faces of these walls are disposed at an angle to each other in order to form the angular upper faces of the brass. These walls also are recessed as indicated at 16 in alinement with the recess 11 to form the end rib of the brass. On one of the walls 14C of this face ofthe molding section, which for convenience may be termed the rear face, is a projecting rib 17 that extends from the top of the section down to a point adjacent the lower end thereof and there terminates in an abrupt horizontal shoulder 18 that extends back to the plane of the' rear wall of the rib 15.

The rib 17 as shown more clearly in Fig. 6 is provided with a number of recesses 20 which, as will be readily recognized, follow the general contour of the side webs of the Master Gar Builders brass. The opposite rib 15 is provided on its rear face with a lug 21 that extends rearward from the upper endv of the' section and rejects outward to a point in alinement with the rear face of the rib 17. p

The front face of each section is fiat as indicated at 255 in FLO'. e, and at 'one 'a forwardly projecting rib 24: of a thickness corres ending to the thickness of the lug K 21 an having its top terminating in anabrupt horizontal shoulder 25 that is arranged to engage a similar shoulder 26 at the base of the lug 21 of the next adjacent section. The inner-most or active face of the rib 24 Projecting from the face 23 of the section is a lug 28 which will extend partly into thelarge central recess 20 formed in the rib 17 and Will cooperate with the Walls of the lat ter in shaping the side webs, while a corresponding lug 29, formed at the inner face of the rib 24 shapes the opposite side of the brass. Projecting from the bottom of the face 23 0f each section is a plate 31 in the form of a flange, the outer edge of which conforms tothe angular rear face of the next adjacent Section and the thickness of this flange is such that the lower shoulder 18l of the flange 17 of the next adjacent sec tion will rest" thereagainst. Thev ilange 3.1 of each section will form the bottom of the mold and will also serve in part as a support for the next adjacent section in that lt receives the shoulder 18 at the bottom of flange 17 of said next adjacent section, while at the same time the shoulder 26 of the lug 21 of said adjacent section will rest against the tcp shoulder 25 of the flange 24 of the first section. Secured to the flat front face ofeach section is a convexi member 36 which may be provided with suitable fastening de vices, as, for instance, pins 3,7 which enter corresponding sockets the flat face referred to, and this member 36 is provided at the top with a forwardly projecting lug 38, the inner face of which is provided with a tapered groove 39 which in combination with the tapered opening 40 at the top of each of the main sections constitute .a pouring gate through which the molten brass is poured in the casting Operation.

The rear face of each of the members .36 is provided at the top with a concaved recess 4 .1 which also forms a part/cit .the gate running into the next adjacent mold so that themembers 36 Will in ecet ,form partitions to separate the severalgates from each other. The Section 36 shown in Figs. l and 2 is provided with a smooth curved surface forming part of a cylinder and of a shape corresponding te the concave face that receives 'the journal of the ear axle.

Where it is desired to form a concave face having grooves that is to say to cast a self.- oiling brass, the Section B6 of the type shown in Figs. 3 and 7 is substituted for the section 36. The member 36,*at `is of the same general contour as the member 36 lexcept that its convex face is provided with a plus rality ofribs 44 running in slightlhelical lines and ntersected bf'a longitu inal rib 4:5 that extends downward from the gatef` way lug 38e. These ribs form grooves in the bearing surface of' the brass in orderto perrmit ready feeding and passage of the lubricant. To make other type of self-oiling bearings, that is to say, bearings in which the brasses are rovided with perforations extending entirey therethrough, a number of tapered blocks @L7 may be attached to the back face of each section, as indicated in Fig. 6.

Where it is desired to form a lead-lined brass a number of sections Bb, 36 ar-e substituted for the section 36 and these form the inner face of the brass of a substantially triangular contour and provide a relatively deep rib as shown in Fig. e, the dotted lines in this case representing approximately the cross sectional contour of the 'brass before the application of the lead.

After the brass has been cast, removed from the mold, and the gate cut away in the usual manner, the brass is placed in a mold having the cylindrical member 36 in place and there will then be a space between the inner face of the brass and the convex face of the member 86, and this is filled with ead, Babbitt metal or other composition.

While the several sections 3 6, 36% etc., have been described as removable and in` terchangeable it is obvious that they may be cast or otherwise formed integral -with the sections Where numbers of brasses of precisely the same type are Vto be made.

In practice any number of mold sections are assembled together in the manner shown in Figs. 1 and `2 and each has its independent gate through which the brass is poured. The sections are held from independent ver.- tical and lateral play by reason of their intertting parts, While the s reading of the sections on the entrance o the molten metal may be prevented by the employment of any of the clam .ing devices ordinarily used for holding mo d sections together.

1. In a mold 'of the class described, a series of like sections .each having two oppo? site molding faces and provided with an interchangeable member on one' of said faces for the formation of the concave faces ofV car brasses, said members being provided at their upper ends with lugs shaped to form portions of the gates.

2. A mold section having a central vertical web, the rear face of the section at o p0-l site sides of the web being provided wit inclined faces, the rear face of the web and the corresponding or alinin portions of the faces being recessed, one o ysaid Vfaces have ing a projecting rib that terminates short ofthe bottom of the section and the other face being provided at the to with a pro-l jecting lug, the front.- face o each section having-atfthe bottom an an "ar- `dange ar.-l ranged to yfit withinthe angiiii rear face of an adjacent section, onel side of the front face belng provided with a flange adapted to fit against the lug of a mating section, and an auxiliary member arranged to (it against the front face of the web and to shape the concave face of the brass, the auxiliary member and the upper end of the central web being shaped to form independent gateways to adjacent mold spaces.

B. A movable mold formed of a series of like nesting sections having tWo opposite molding faces and provided With interitting ribs projecting from both said faces and each having an extension at it-s upper end, and a shaping member secured to the front face of each section and havin a vertical lug at its upper end to bear against the extension of the upper end of the section and to coact therewith to provide gate-Ways to the adjacent molding spaces.

4L. A mold section having a central, vertical web, the rear face of the section at op osite sides of the Web being provided With 1nclined faces, the rear face of the Web and the corresponding or alinin portions of the faces being recessed, one o? said faces having a projectin rib that terminates short of the bottom of te section and the other face being provided at the top With a projecting lug, the front face of each section having at the bottom an angular flange arranged to lit Within the angular rear face of an adjacent section, one side of the front face being provided with a flange adapted to fit against the lug of a mat-ing section, and the upper end of the central Web being shaped to form independent gateways to adjacent mold spaces.

In testimony that I claim the foregoing as my own, I have hereto aiiixed my signature in the presence of tWo Witnesses.

GEORGE LINTGN HOFFER.

Witnesses:

GEO. Yarns, E. E. FERRELL.

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