USRE1229E - Improved cast seamless thimble-skeins for wagons - Google Patents

Description

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BRIDGET LEONARD', OF KENOsIIA, WISCONSIN, ADivIINIsTRATRIX OF ESTATE OE ANDREW LEONARD, DEcEAsED.

IMPRVED CAST SEAMLESS 'l'.HIMBLE-SKINS FOR lWAGONS'.

Specification forming part of Letters Patent No. 16,685, dated February 24, 1857;

Reissue No'. 575, dated July 27, 1858; llcissne No. 1,220, dated October S, 1F61.

To all whom, it riz-ay concern.-

Be it known tllat A. LEONARD, deceased, late' of the city and county of Kenosha, State of Wisconsin, did invent a new and useful Im-V provement in Gast Thimble-Skeins for \Vagoul Axles, of which the following is a full, clear,

and exact description, reference being had to the accompanying drawings, forming a part of this specification, in which- Figures 1 and 2 represent the improved cast thimble-skein, and Figs. 3, 4, 5, 6, "7, 8, 9, 10, and 11 the means which are employed in its production. Fig. 12 is a section of va skein with seams.

Similarletters of reference in each of the several figures indicate corresponding'parts.

The nature of this part of ANDREW LEON- ARDsS invention consists in a cast thimbleskein for axles which is seamless both inter-A nally and externally, and has no portion of its chilled surface removed by turning or filing after it is withdrawn from the mold.

Cast thinlble-skeins without seams internally have never been made by any other mode than that patented by ANDREW LEONARD under another patent of even date with this; and the only way in which cast thimble-skeins have been made seamless on their outer surface, by

4 othermodes than LEONARDs, is by filing off the seams after the skeins have been removed from the molds. Thus filing or turning Off the seams causes a destruction. of the glazed or chilled surface of the skeins and lesscns the durability yand increases the frictional wear between the skeins and the boxes in which they run.

In order'to demonstrate that a'cast seamless thimlile-skcin can be manufactured, a deseription of the means which ANDREW LEON- ARD adopted and of the skein itself will now be given. v

The east thimble-skein A, Figs. 1 and 2, is of taper form longitudinally and cylindrical transversely in the line w w, and elliptical in the line y y. A collar orI shoulder, a, is formed on its outer circumference all round, and on vits inner circumference a shoulder, b, which extends partly around, is formed. lThere is also a bead, c, formed on the outer surface of .the elliptical portion of the skein. The inof a series of sections,

ner and outer eircumferences of the skein are glazed or chilled, and are free from longitudinal seams, suoli as are shown at d d, Fig. `12, when it leaves the sand mold.

B, Fig. 3, represents a tapering tubular patl tern, similar in forni to an axle-skein, excepting that the part which forms the collar a is not formed on it. This pattern is used vertically, and forms the`i1npression for the whole of the interior and exterior of the skein, excepting the collar a. v

Bis a loose pattern of ring form placed. over the small end ofthe tubular pattern B, and forced up snugly against the shoulder b" of said pattern. This ring pattern gives the form or impression for the collar a of the skein.

C D E Fis a box or other shaped flask, formed one'of whichthat F--' serving as a pattern guide and support during a certain stage of the Operation, and then going out of use to make place for the section E, as will'bc presently described'. The dividing lines of the several sections'all run horizontally.v 4 y Gis a vertical seinicircular hollow-core bar for adjusting or centering the core whenever it gets out of true.

The mode of .operation is as follows: First,

` arrange the open section F in proper position,

and place ring-patterns B on its top and concentric with the guide-holes c e e e therein;- then insert the small ends of patterns B through the ring patterns and holes until the shoulders Zn iit snugly against the ring patterns, andthe ends of the tubular patterns `enter circular recesses s in the bottom-board of section F, as shown in Fig. 3. The pattern B B', being now centered and steadily confined, the seetion Dis placed on top of section F, and with,- init sand is placed and rammed tightly all round the butt or elliptical portion of the pattern up to the center of the bead c. molding section -F up properly and putting on parting-sand, section C is placed O11 top of D, as shown in the drawings, Fig. 3, and into it sand is' placed and rammed'tightly. Some sand or mold is also thrown into the tubular patterns B at this stage and the core-bars G adjusted centrally in said patterns. Then thel operation of filling the patterns and ramming the sand is .continued until the sandrises level I with the upper edge of section C. The sand thus rammed in the sections C D andin the pattern is confined by means of a board, H,

'said board having holes f `through it for the passage of the handles of the core-bars, and also having cleats on its upper surface for the purpose Of holding the board elevated above 'the floor or ground when the ilask isinverted,

as shown in Fig. 4. When the Operation has lproceeded to the extent shown in Fig. 3, the

several sections are firmly clamped together and the Whole adjusted, as shown -in Fig. 4, so that the largest end of the pattern is down and molded in sand, while the smallest end is up and not covered with sand in the Open section F of the flask. The clamps are then removed, and the Open section F lifted Off, its

use as a support to the ringvpattern and as a guide to the tubular pattern being no longer necessary. rlhe removal of section F makes room for section E, and as the sand has only' beenmolded up to the flat surface of the colv.lar B', lit is necessary to place section E on section C, but, before doing so, parting-sand must be sprinkled on the moldedV sand in section C. All being ready, put the sand in Y section C, and ram it until it rises even with the edge of section C, as represented in section 5. This beingdone, the next part of the operation is to apply the cope (not shown) with other parts for thc pu rpose of finishing the small end of the mold, so that it will form ascreW-thread on the small end of the skein; but as this latter operation does not constitute a part of the improvement in skeins that ANDREW LEONARD claimed under his surrendered patent, it is not deemed necessary to explain it here. It also is now commonly practiced in molding axle-skeins, and will be readily understood by those skilled in the art.

'To remove the pattern lwithout injuring the impression formed Vby it in 'the sand, li O' the cope, (not shown,^) then section C, known as the upper cheek-piece, then the section D, known as the lower cheek-piece),-7 Said ,parts being removed, the tubular pattern B Vgcalnvbe moved up over the sand-core of the mold. The ring pattern and the tubular pattern having been removed, the sand-core of the mold remainsstanding in a vertical tion, and lias for its support a portion of the sand-mold which has the external impression of the skein-formedin it, as shown i'n Fig. 4. The sections E and D are now readjusted to their positions, as shown in Fig. 5, and when thus adjusted they, in connection with section C and the core I, form the mold for the entire skein, as shown in Fig. 5. In case the core I springs laterally at its upper end, and thus gets out of true, as illustrated at J the molder'takeshold of th lower end Of Y Laan Y the core-bar and adjusts the core to the positon shown in Fig. 6, he being enabled to make the adjustment accurately by keeping his eye ou the upper end of section E. After the adjustment is made, the cope, (not shown,) with'mold for forming the screw-threaded end of the skein, is placed on section E. All now being ready, the molten metal is run into the mold near the base, and the axleskein shown in Figs. 1, 2, yand 6, with a screw-thread plug (not shown in drawings) in its small end, is the result of the whole operation.

ln Fig.'7 the core-bar extends down' into solid sand, the section C of flask being lengthcned for that purpose. The end oi' the bar thus molded in the sand will afford support to the core, and .thus tend to prevent springing or inelining out of the center of the core when the pattern is withdrawn. It, however, is far preferable to have the core/bar extend Outside of the flask, so that the core may be adjusted by hand,`

A seamless thimblc-skein,.perfect and truc in the rough casting, is'a very important and useful article of manufacture, as' skeins east in divided horizontal patterns necessarily have longitudinal seams on their inner and outer circnmferences, and said seams, at least On the outer surface of the skeins, require to be filed or turned oli', and thus are more expensive', and are less durablc,because thechill or glazed surface is destroyed, and they work with greater friction, as the surface Of the metal exposed by turning or filing is much softer than that .which is exposed when the casting comes direct from the mold.

Having described the seamless cast tliimbleskein Of ANDREW LEONARD, and shown one practical mode of manufacturing the same, it remains to be stated that under'this patent the means shown, nor any other means, lare not claimed; also, that in a patent of even date with this substantially said means are claimed. Therefore Y What is claimed under this patentes the'invention of ANDREW LEONARD, and desired to be secured by Letters Patent, is

A cast seamless thimble-skein, substantially such as speciiied, which is not made seamless by filing, turning, or otherwise being manipulated with after it leaves the mold.

Witness my hand and seal this 10th day of July, 1861, in the application for reissue of ANDREW LEONARDS patent for improvement y in seamless cast thimble-skein.

BEmGE'r LEONAEnv [1.. s.) Administratn'af QfAmIrcw Leonard, deceased.

- Witnesses: 'f Y `\R.A.Prn:LsN,

Tuos. ENGLISH.

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