US738880A - Casting-machine. - Google Patents

Description

No. 738,880. PATENTED SEPT. 15, 1903.

S. W. BRADLEY. I

CASTING MACHINE.

APPLICATION FILED AN. 23, 1903.

N0 MODEL. I s SHEETS-SHEET 1 muramsam PATENTED SEPT. 15, 1903.

' s. W. BRADLEY.

CASTING MACHINE.

, APPLIO-A'IZ'ION FILED JAN. 23, 1903.

N0 MODEL. 3'SHBBTS-SHEET 2.

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- S. W. BRADLEY.

CASTING MACHINE.

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UNITED STATES Patented September 15, 1903.

PATENT OFFICE.

SILAS WILLIAM BRADLEY, or CORN ALL, CANADA, ASSIGNOR TO THE CANADA MOTOR BEARING OOMPAN Y, or CORNWALL, ONTARIO, CANADA.

CASTING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 738,880, dated September 15, 1903.

Applicat on filed January 23, 1903. Serial No. 140,271. N 11106 1 To all whom it may concern.-

Be it known that I, SILAS WILLIAM BRAD-- LEY, electrical engineer, of the town of Cornwall, in the county of Stormont, Province of Ontario, Canada, have invented certain new and useful Improvements in Casting-Machines, of which the following is a specifica tion. 1

My invention relates to improvements in casting-machines; and the objects of my in-' vention are to devise a simple, cheap, and

the lining of Babbitt .or other antifriction metal may be cast in the bearing-box shells of the class described with sufficient accuracy to avoid the necessity of any machinework thereon, further objects being to make the machine convenient to manipulate and such that the lining may be cast to fit shafts of various sizes; and it Consists, essentially,

of a suitable plate mounted on a frame of any desired construction, a semicylindrical core with means for holding down one end of the semicircular shell of the bearing-box and also to form the face for one end of the mold, a clamp being provided for securing the opposite end of the core to the plate and a knife cut-off for forming a clean-cut edge at the upper end of the babbitt, a pair of punches or pins being provided for removing the shell from the machine after the operation of casting the lining has been completed, the various'parts of the device being constructed and arranged in detail as hereinafter more particularly described.

Figure 1 is a perspective view of the machine,the removable parts thereof being tilted into the horizontal position. Fig. 2 is a vertical section through the center of the machine on the line XX, Fig. 3. Fig. 3is a plan view of the machine, the knifo-cut-off attachment being shown in dotted lines. Fig.

4 is a detail perspective view of the knifecut-off. Fig. 5 is a reduced side elevation of the machine, showing the alternative form of the device for removing the shell from the machine. Fig. 6 is a sectional view of the machine on the line-Y Y, Fig. 2. Fig. 7 is a longitudinal section through the center of one of the bearing-boxes to cast whose lin- Babbitt or other antifriction metal.

ing the machine is designed. Fig. 8 is a detail of the end piece of the core.

In the drawings like characters of reference indicate corresponding parts in each figure.

The principal parts of the machine are supported on a frame A, which consists of I the uprights a, connected by a cross-web a.

B is a bed-plate which is supported. by pivotal screws (1, 0. extending into its sides, the said screws extending through holes at .the upper ends of the uprights a a. easily-constructed machineby means of which C is a semicylind rical core which is intended to form, with its circumference, the inner circumference or surface of the lining of- Anum ber of these cores may be provided, the sizes corresponding to the sizes of the shafts for which the various bearing-linings are to be cast. The core 0 is secured on the bedplate B by means hereinafter described and is held in the center thereof by means of a suitable key 0 extending into grooves 19 and 0, formed in the bed-plate and the core, respectively. In the end of the bed-plate a longitudinal slot 1) is formed. The end of the core 0 is slightly reduced, forming the shoulder c.

C is a retaining'clamp which serves the double purpose of forming the upper end of the core and also securing-the core proper to the bed-plate. The latter object is attained by forming a recess 0 in the retainingeclamp G, into which the reduced portion 0 of the core extends. A screw 0 is secured at one end to the clamping-piece and passes through the slot 1), its other end being provided with a suitable thumb-nut c It will thus be seen that on tightening the thumb-nut c the clamping device 0 will be drawn firmly against the bed-plate, and this in turn will go secure the core 0 in place.

c is a small boss which is formed around the inner edge of the clamping-piece G, the object of this boss being to form acorresponding groove 7 in the metal when cast, for ma 5 sons to be hereinafter explained.

D is one of the approximately semicircular halves or sections of the bearing-box shell in which it is desired to cast an antifrictionlining. This shell is placed on the bed-plate I00 B over the core 0, thus leaving a space E between the core and the shell, into which the Babbitt or other metal is poured to form a lining. The shell is held centrally on the bed-plate by means of side pieces or walls 0 formed along the edges of the bed-plate.

F is an end piece which serves the double purpose of clamping down the end of the shell and forming the lower face orend of the mold. This end piece has an overlapping substantially semicircular portion which engages the edge d of the shell.

f f are the side pieces of the end piece. These side pieces extend downwardly through lateral grooves c 0", formed in the bed-plate E.

f is a yoke which is bolted at its ends to the side pieces f f. A screw f passes through a threaded hole in the yoke f and passes loosely through a hole in a suitable bracket f*. The screw f is provided at its end with an enlarged portionf which prevents its slipping through the hole in the bracketf It will now be seen that on turning the screw f in one direction by means of the handle f the end piece F will be drawn down firmly toward the bed-plate and the overlapping portion thereof will engage the edge of the shell D, thus holding it firmly in position.

In order to secure the lower end of the core to the hed-plate, any suitable means may be provided; but the means which I employ, preferably, are as follows: The core, it may here be mentioned, is provided with an end of reduced diameter, which extends through a holef formed in the end piece F. A slot b extends through the bed-plate B. G is a clamp having a curved portion g, designed to engage the reduced portion of the core 0, and a straight-threaded portion g, which passes through the slot 1) and is provided at its opposite end with a suitable thumb-nut g and it will thus be seen that the core may be held firmly down at its lower end by tightening the said thumb-nut.

The cut-off which I have devised for the upper end of the casting is as follows: 11 is a clamp which consists of a semicircular portion h, designed to surround the shell at the upper end thereof. This portion is provided at one end with a handle it and at its opposite end with an extension 7L2. A swinging piece 72. is secured by a bolt to the extension h and is designed to extend beneath the bedplate, a portion 7L being provided thereon of suitable shape to abut the under side of the bed-plate. An enlarged end 71, is formed on the swinging piece 763 and is formed with a slot h. A screw 7L7 is pivotally secured at one end to the inner end of the handle h, and when this clamping portion is in position the outer end of the screw extends through the slot 71 and is provided with a tightening thumb-nut h It will be seen from the above that the clamp is made up of two members, one member having a semicircular portion to engage the shell and the other member being pivoted to the first and adapted to engage the bed-plate, means being provided for holding the two members together.

I is the cut-011" knife, which is semicircular in form, the edge thereof being designed to slide flush with the upper end of the shell D. One end of this knife is pivotally secured to the extension 71 the other end thereof being provided with a handle '6.

J is a core-piece to form an oil-inlet 4 through the lining. This piece extends through the opening d in the shell D and fills up a portion of the space E that would otherwise be filled with the babbitt. A spring K is secured to the top of the end piece F, and this spring holds the core-piece J in place.

The cores 0 are numbered, the number being intended to designate the size of the shaft to which each core corresponds. As it is desirable that the bearing-box sections should be similarly n umbered,l have devised a means whereby the number may be cast in the antifriction metal. This consists in providing a screw L, which extends at an angle through the end piece F into the space to be occupied by the molten metal. A number is cut on the end of this screw which corresponds to the number on the core, and it will thus be seen that on removing the complete shell and lining from the machineacorrespondingnumber will have been impressed on the lining.

As it is generally necessary to provide a tight fit between the edges of the shell and the side pieces of the bed-plate, it is found that in some cases there is more or less difficulty in removing the shell after the lining has been cast. To get over this difiiculty, I have provided the ejecting-punches M M. These punches extend into holes formed in the bed-plate and may be forced in against the edges of the shell by suitable means. One means, which I have illustrated in Figs. 1,

2, and 3, consists of a yoke 171, secured to the two punches M M, a screw m being designed to extend through the said yoke, having a threaded bearing therein. The end of said screw has an enlarged portion m held from longitudinal movement by the bottom of the bed-plate, and a suitable bracket m It will thus be seen that by rotating the screw by the handle m the punches may be advanced. or retracted. In Fig. 5 I have shown another method, which consists of a lever N, suitably pivoted to the base of the machine at n and being provided with a stop '17, to hold it in a convenient position when not in use. The punches in this construction of the device are provided with a yoke similar to M, against which the lever is intended to press, thus forcing the punches through the holes and ejecting the shell from the bed-plate. A suitable spring m is provided on each of the punches M, whereby the said punches are caused to be automatically retracted as soon as the pressure from the lever is released. In this form of the-device it is necessary to make a slight alteration in the frame and in the bed-plate in order that the bed-plate will remain upright while the shell is extracted. In the web a a slight bend a is formed. The end of the bed-plate is extended so as to abut the bend a in the web, thus preventing the machine from tilting when the pressure is brought on the yoke Mfrom the lever N, and the base of the machine in this construction may be altered in any suitable manner to provide means for securing the lever thereto.

In Fig. 7 I have shown a longitudinal section of the complete box, in which D D are the upper and lower halves of the outside shell and d is the lubricating-opening formed therein. 2 is the upper half and 3 is the lower half of the lining, and lis the lubricating-opening therein, which forms a continuation of the opening (1. 5 is a piece of metal which is suitably secured in the bottom half of the shell and is hard andless liable to melt than the antifriction-metal lining. The object of this piece of metal is to prevent the shaft from dropping down too far in case of the antifriction-metal lining becoming melted if the bearing should become dry. 6 is a dust-proof disk which maybe inserted in the annular groove 7, formed in the antifrictionmetal lining, as above described.

Having now described the construction of my device in detail, I will proceed to point out the mode of operation of the same. When the various parts are being placed in position on the machine, the bed-plate is preferably tilted into the horizontal position, as shown in Fig. 1. The core 0 is first placed in position, where it is held centrally, as above described, the lower or forward end thereof extending through the hole in the end piece. The clamps for securing the core are then tightened up. The shell is next placed in position, a suitable space being left between the end of the shell and the end piece F to form the face of the metal lining when cast. The end piece is now tightened down by means of the screw f thus holding the lower or forward end of the shell in position. The next step is to screw the clamp H in position, and when this has been done the lower edge of the knife I will be flush with the top of the shell. The machine is now tilted into the vertical position, as shown in Fig. 2. The beveled portion of the knife will thus form a funnel which will direct the molten metal when poured into the space which it is to fillthat is, the space between the shell and the core. When this space has been filled with molten metal and while the metal is in the molten state, the handles t' and h are forced together, thus cutting oi the upper edge of the metal clean and straight. The

machine may be taken apart as soon as the metal has had time to cool, and by turning the handle m the punches M M will force the box awayfrom the bed-plate.

It will now be seen that I have devised an extremely cheap, simple, easily-operated, and

convenient machine whereby the antifrictionmetal lining may be very quickly renewed in axle-boxes of the class described.

Although I have described the details of the construction which I have adopted, it is to be understood that I do not wish to be limited to the actual construction of the various parts of the machine which I have illustrated and described, as certain changes might be made in the machine with which it would act equally well, but which would only require the exercise of mere mechanical skill. For example, other means might be employed for drawing down the end piece F, other forms of clamps might be used for securing the ends of the core to the bed-plate, and such changes as these I might make in the device without exceeding the scope of my invention.

What -I claim as my invention is 1. I11 a casting-machine the combination with the bed-plate, of a shell in. which the lining is to be cast and a core to form the inside of the lining, both located centrally on the bed-plate, a movable end piece for the mold having a rigid overlapping portion extending at right angles to the main portion and adapted to engage the shell and side pieces extending through guiding-slots in the bed-plate, means for drawing said end piece toward the bed-plate and a suitable cut-0E for the upper end of the mold as and for the purpose specified.

2. In a casting-machine the combination with the bed-plate having a central keyway and side flanges, of a shell in which the lining is to be cast, and a core to form the inside of the lining, the shell being held centrally on the bed-plate by said side flanges, and the core by a key in said keyway, a movable end piece for the mold having a rigid overlapping portion extending at right angles to the main portion and adapted to engage the shell, means for drawing said end piece toward the bed-plate, and a suitable cut-0E for the upper end of the mold as and for the purpose specified.

3. In a casting-machine the combination with the bed-plate of a semicylindrical shell in which the lining is to be cast, asemicylindrical core to form the inside of the lining, both located centrally on the bed-plate, an end piece for the mold having an overlapping semicircular portion to engage the shell and side pieces extending through slots in the bed-plate, a yoke secured to the ends of said side pieces, a screw threaded in said yoke and a suitable handle for turning the screw whereby the end piece will be drawn downwardly and will hold the shell rigidly down to the bed-plate, and a suitable cut-off for the upper end of the mold as and for the purpose specified.

4. In a casting-machine the combination with the bed-plate, of a semicylindrical shell in which the lining is to be cast, a semicylindrical core to form the inside of the lining of said shell, and centrally located on said bedplate means for securing the lower end of the shell firmly to the bed-plate, means for forming the lower end or face of the mold, a clamp to secure the upper end of the shell to the bed-plate and a suitable cut-off knife carried by said clamp and removable therewith as and for the purpose specified.

5. In a casting-machine and in combination with a bed-plate, a semicylindrical core attached thereto, a clamp comprising two members, one of which has a semicircular portion to engage the shell in which the lining is to be cast and the other member of which is pivoted to the first member and is adapted to engage the bed-plate with means for holding said members togetherabout said bed-plate and core and a semicircular knife pivotally supported and operating in connection with the semicircular clamping member, substantially as described.

6. In a device of the class described the combination with the shell and means for casting a lining in said shell, and the bed-plate having holes therethrough covered by the edges of the shell, of a pair of punches located in alinement with said holes, a suitable yoke connectingsaid punches, ascrew threaded in said yoke and means for holding said screw from longitudinal movement, consisting of a head m on the screw, bearing on the bed-plate and a bracket m outside said. head and through which the screw passes, a suitable handle on the end of said screw as and for the purpose specified.

7. In adevice of the class described the combination with a frame comprising upright posts suitably connected together and having screws threaded in their upper ends'and extending inwardly, of a bed-plate pivotally mounted onsaidscrews,asemicylindricalshell centrally located on said bed-plate, a semicylindrical core centrally located on the bedplate, having reduced ends, means engaging the said reduced ends of the core for securing the core at its ends to the bed-plate, means for securing said shell at its opposite ends to the bed-plate, means for forming the lower end or face of the mold, a suitable cut-off for the upper end of the mold, means for forcibly removing the shell from the bed-plate when the lining is cast therein, said securing means for the core and shell and the means for removing the shell being carried by the said bed-plate and turning therewith as and for the purpose specified.

8. In a casting-machine the combination with the bed-plate, of the shell, and the core to form the inside of the lining, both located centrally on the bed-plate, an end piece for the mold designed to engage the shell and means for causing said end piece to grip the shell and hold it firmly on the bed-plate as and for the purpose specified.

9. The combination with the bed-plate having a longitudinal central keyway and the semicylindrical core having a corresponding keyway and held centrally on the bed-plate by a key, said core having reduced ends, of a clamp having a curved portion adapted to engage the reduced lower end of the core and a threaded portion adapted to pass through a slot in the lower end of the bed-plate and a thumb-nut to engage thelower end of said threaded portion on the opposite side of the bed-plate, and suitable means for securing the upper end of the core to the bed-plate as and for the purpose specified.

10. The combination with the bedplate having the central keyway and semicylindrical core having a corresponding longitudinal central keyway and a key to hold said core centrally in place on the bed-plate, said core having reduced portions at its upper and lower ends, of a combined end piece and clamp for the upper end of the core having a semicylindrical recess adapted to engage the reduced upper end of the core, a threaded bolt secured thereto and extending through a longitudinal slotin the bed-plate and a. thumb-screw threaded on said bolt and adapted to abut the opposite side of the bed-plate whereby the core may be drawn firmly against the face of the bed-plate as and for the purpose specified.

Signed at the city of Ottawa, in the Province of Ontario, this 29th day of-December, 1902.

SILAS WILLIAM BRADLEY.

\Vitnesses:

MAY LYON, FRANK C. ASKWITH.

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