US1258702A - Babbitting-jig. - Google Patents

Description

F. M. PEARMAN.-

BABBITTINGJIG.

APPLICATION FILED FEB. 8. I915.

Patented Mar. 12, 1918.

FZQ. I. a w

wwmaooao 8144 M WW and Hank Ml earman flww N, 4

barren srarusrie'rnNr orrroa.

FRANK 1E. PEARMAN, OF WATERTOWN, SOUTH DAKOTA, ASSIGNOR TO ERVIN J. HANSON, 0F WATERTOWN, SOUTH DAKOTA.

BABBITTING-J'IG.

Specification of Letters Patent.

Patented Mar. 12, 1918.

Application filed February a, 1915. Serial No. 6,730.

To all whom it may concern:

Be it known that I, FRANK M. PEARMAN, a citizen of the United States, residing at 'Watertown, in the county of Codington and State of South Dakota, have invented certain new and useful Improvements in Babbitting-Jigs, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to a babbitting mandrel for engine connecting rods and the like and seeks to provide a simple and effective form of mandrel that may be used by the most inexperienced automobile driver for babbitting the rods of automobile engines and seeks to provide a means whereby the rod will be correctly and accurately babbitted without the aid of any skill whatsoever on the part of the user.

Babbitting apparatus have been constructed that require skill on the part of the user to center and aline the rod and to adjust the distance between the centers of bearings of the rod, but devices of this character cannot be relied upon in the hand of the inexperienced, as inaccuracies will result therefrom that will be very destructive to the enginein which the rod is placed.

The present invention seeks to provide an improved babbitting mandrel that Wlll automatically aline the rod, with a fixed distance between the rod bearing centers, means to cast babbitt side thrust collars on the sides of the rod, and means whereby the mandrel may be warmed and the moisture removed therefrom to prevent the hot babbitt from generating steam from the moisture contained therein which has often caused serious injury to the pourer of the babbitt and blown the babbitt to atoms,

' resulting also in the necessity of rebabbitting the bearing.

The steam pressure generated by hot babbitt from the moisture contained in a .babhitting mandrel has been known to burst the forms intended to hold the babbitt and to have thrown the pieces thereof a longdistance, and to have thrown the hot babbitt not only more than twenty feet into the air but also into the face and over the body of the pourer of the babbitt, very serious burns and impaired or loss of eye-sight having resulted therefrom. The present invention is so constructed that the most inexperienced user may warm the mandrel and remove the moisture therefrom without placing the mandrel in the fire or injuring the surface thereof in any way.

With these and other objects in view, the invention consists in the features of construction, combinations and arrangements of parts hereinafter set forth, illustrated in the accompanying drawing and more particularly pointed out in the claims appended.

In the drawings,

Figure 1 is a plan view of the improved babbitting mandrel and accompanying parts with a certain part removed.

Fig. 2 is a view in vertical longitudinal section with a dotted sectional view of the connecting rod and of the babbitt cast therein, the view being taken on line c- -a of Fig. 1.

Fig. 3 is a fragmentary view taken on the same lines as Fig. 2 and illustrating the manner of applying a heated bolt for the purpose of warming the mandrel.

Fig. 4 is a view of the collar shown, in section of Fig. 2, the view representing the side of the collar that lies next to the rod and the babbitt.

The base 1 is preferably of cast iron to insure a low cost of manufacturing, it being obvious that other materials may be employed, and holes 2 and 3 are bored therein each in alinement with the other, the pins 4 and 5 being turned straight and round and fitted tightly into the respective holes. The rods to be babbitted by one size of mandrel are all practically duplicate and the centers of the holes are made accurately the proper distance apart by the mechanic making the mandrel, the pin 4 being fitted to the known size of the respective rod bearing.

' The face 6 of the base 1 is faced true and at right angles to the axis of the hole 3 and the annular groove 7 is cut therein as shown to form a side bearing collar of babbitt to prevent the rod from chafing on the shoulders of the crank shaft the latter not being shown because of the common and well known construction and as a further reason,

the crank shaft is no part of the present on the shoulder, and presenting a face 11 and which is parallel to .the face 6 and which has cut therein the annular groove 12 a duplicate of the groove 7 and serving the same purpose on the respective side of the rod. i

The collar 10 has the annular groove 13 therein to form a pouring funnel to receive the babbitt, the holes 14 serving as pouring holes and as air vents, it being obvious that if babbitt were poured into either of the holes the air would escape through the remaining hole.

,After the babbitt is poured and cooled the collar 10 is slightly turned by any suitable tool and the babbitt in the holes 14 is sheared from that within and on the sides ofthe rod 15.

In Fig. 3 the heated bolt 16 is shown in the 'hole 17 the view being separate from the main View in order to avoid confusion,

the bolt being for the purpose of warming the pin 5 to make the babbitt run smooth and to remove the moisture from the pin to prevent the explosion thereof. The bolt 16 gay be heated in any manner as any amount f heating of the bolt will not injure the smooth surfaces of the mandrel that would be ruined by coming in contact with fire or extreme heat.

.The babbitting mandrel is ofchief importance for the babbitting of .the connecting rod bearing of automobile arid farm engines without the aid of measuring and ad usting tools and by unskilled persons who are not mechanics. It may also be advantageously employed by mechanics in the-factory where the engine is built and will prove a time saver and insure greater accuracy with less care.

Having described my invention, what I claim as new and desire to secure by Let ters Patent, is

1. In engine connecting rod babbitting mandrels the combination of a base, plural pins projecting parallel from said base, a collar fitting the projecting end of one of said ins, and said latter pin being hollow.

2. 11 engine connecting rod babbitting mandrels the combination of a base, plural pins projecting at parallel right angles from said base, and one of said pins being hollow so that it may be heated from withln.

3. In engine connecting rod babbitting mandrels the combination of a base, plural plns projecting at parallel right angles from said ase, a collar fittin the outward proectlng end of one of said pins, an annular groove in said collar to serve as a funnel.

to receive babbitt, and holes in said collar to conduct babbitt and for the escape of air.

4. In engine connecting rod babbitting mandrels the combination of a base, plural pins projecting at parallel right angles from said ase, a hole extending through one of said shoulder, an annular groove in the' inner face of said collar, an annular groove in the outward face of said collar, and holes ponnecting the annular grooves in said'col- 5. In an apparatus of the character described, a mold for casting metal bearings, comprising a base member in the form of a rectangular bar having one of its surfaces plane and adapted to have a connecting rod positioned parallel with its plane surface, a perforation at each end of said base memberat right angles to its plane surface, said perforations spaced apart'so that their centers are coincident with the centers of the bearing perforations in the connecting rod in which the bearing is to be cast, a substitute crank pin rigidly secured in each of said perforations at right angles to the plane surface of said base member both projecting outward from the same plane surface and the combination of a connecting rod having said substitutea rectangular bar having one of its surfaces plane and adapted to have a connecting rod positioned parallel with its plane surface, a perforation at each end of said base member at right angles to its plane surface, said perforations spaced apart so that their centers are coincident with the centers of the bearing perforations in the connecting rod in which the bearing is to be cast, a substitute crank pin rigidly secured in each of said perforations at right angles to the plane surface of said base member both projecting outward from the same plane surface, one of said substitute crank pins having a part of its length of a diameter equal to that of the crank pin or shaft upon which the connecting rod bearing works and the combination of a connecting rod having said substitute crank pins centrally positioned in its bearing chambers.

7. In an apparatus of the character described, a mold for casting metal bearings, comprising a base member in the form of a rectangular bar having one of its surfaces plane and adapted to have .a connecting rod positioned parallel with its plane surface, a perforation in each end of said base member at right angles to its plane surface, said per-' forationsspaced apart so that their centers which the bearing is to be cast, asubstitute 13o crank pin rigidly secured in each of said perforations at right angles to the plane surface of said base member and both projecting outward from the same plane surface, one of said substitute crank pins having a part of its length of a diameter equal to that of the crank pin or shaft upon which the connecting rod bearing works, a disk shaped end closure member adapted to form one end of the bearing rigidly secured to said substitute crank pin and the combination of a connecting rod having said substitute crank pins centrally positioned in its bearing chambers.

8. In an apparatus of the character described, a mold for casting metal bearings, comprising a base member in the form of a rectangular bar having one of its surfaces plane, a perforation at each end of said base member at right angles to its plane surface, said perforations spaced apart so that their centers are coincident with the centers of the bearing perforations in the connecting rod in which the bearing is to be cast, a substitute crank pin rigidly secured in each of said perforations at right angles to the plane surface of said base member both projecting outward from'the same plane surface, a thumb screw in one end of said base member adapted to rigidly secure the substitute crank pin rigidly in the perforation in the base member and a connecting rod .having said substitute crank pins centrally positioned in its bearing chambers.

9. A babbitting device comprising a base plate, a piece to be babbitted, means associated with said base plate for securing at one end said piece, said means having an annular recess below said piece, a mold member havin an annular recess above the piece, a core rmly secured upon the first named means adapted when the piece to be babbitted is placed thereon to forma space therebetween to receive the Babbitt metal, and means carried by the base plate for supporting the free end of said piece.

10. In engine connecting rod babbitting apparatus, the combination of a base, plural parallel pins projecting at right angles from said base, an annular recessed portion adjacent said base around one of said pins, a collar fitting around the projecting end of said latter pin and against a shoulder thereof, said collar having an annular recess in the'side thereof facing said base.

In testimony whereof I affix my signature in the-presence of two witnesses.

Witnesses:

E. J. HANSON, A. L. SHERIN.

Images