US1459050A - Skate and method of making the same - Google Patents

Description

June 19, 1923.

v c. B. DREVITSON- sxm: AND METHOD OF MAKING THE SAME Filed Aug. 23. 1921 FIG-.5.

INVENTEIH 002W Patented June 19, 1923.

CARL B. DREVITSON, OF SOM savanna, MASSACHUSETTS.

, SKATE AND METHOD OF MAKING THE SAME.

Application filed August 23, 1921'. Serial No. 494,513.

To all whom it may concern: I

Be it known that I, CARL B. DREVITSON, a citizen of the United States, residing at Somerville, in the county of Middlesex and State of Massachusetts, have invented neW* and useful Improvements in Skates and Methods of Making the Same, of which the following is a specification.

This invention relates to an ice skate which includes a one-piece casting, composed of metal, such as aluminum, or an alloy of Which aluminum forms a considerable part, said casting including a base portion and upstanding foot supports integral therewith, as in the skate disclosed bymy Patent No. 1,115,7 90, dated November 3, 1914, the base portion containing the upper edge portion of the steel skate runner.

to prevent the contraction of the casting by cooling from imparting to the acting edge of the runner a form varying from the vdesired predetermined form. To these and other related ends the invention consists in the improvements Which I Willnow proceed to describe and claim.

0f the accompanyingfdrawings forming a part of'this specification;-

Figure "1 is va side elevation of a skate embodying the invention.

Figure 2 is a section on line 2-2 of Fig ure 1. y

Figure 3 is a fragmentary longitudinal central sections" Figure t-is a side view showing a portion of the runner provided With a reinforcing strip, I

Figure5 is a top view of the runner por tion and reinforcing strip shown by Fig ure 1. a

Figure 6 is a side view illustrating the changes of form Which are causedby the contraction of the casting.

bottoms of the recesses.

The same reference characters indicate same parts in all of the figures.

I In the drawings 12 represents asteel run? ner having recesses 13 inits upper edge whereby portions of said upper edge are,

converted into longitudinally extending tongues 14:, projecting from the upper edge and extending in a row longitudinally of the runner, the sides of said tongues'being flush with the sides of therunner and their ends beingundercut to overhang portions of the base portion'and' 16, 17 and 18 the upstand- 15 represents the 1 ing standard portion of a one-piece casting preferably composed of aluminum or an alloy includingaluminum and steel or other metal or metals. The standard 16 has a heel supporting plate or recess 19 cast there-,

on, and on thes'tan'olards 17 and 18 sole supporting rest 20. v i I e 1 The casting isformed in asuitable mold are cast a or die adapted to enclose the recessed and tongued upper edge portion of the runner,

the form of the die being such that thebase 7 portion 15 covers portions'of the sides of the runner and fills the recesses 13 so that the base portion is provided With tongues 21 (Figure 3) interlocked With the runner tong es 14. Y i i.

The described formof the runner enables it to be quickly and inexpensively manufac- Cured by stamping Operation, no cutting" or 1 grooving of the sides of the runner being required. The interlocking tongues 14and-21 i provide a strong durableunion,betweenthe runner and the casting. p fThe recesses and tongues of the'run'nerenable a reinforcing strip 22 of hard sheet. 1

metal, such as steel, to be engaged with the runner as indicated by Figures' lando be fore the casting is formed upon the runner.

Said strip, Which is flexible, is engaged with a the undercut ends of two] of the tongues 14 casting. The reinforcing strip is held in its proper position relatively to the runnerby friction before the casting is formed. The

wider sides of the reinforcing strip, extend crosswise of therunner as shown by' Figure" 2, so that the strip'is well adapted toresist and bridges another tongue as'shownin Fig- I I, ures l and 5. The reinforcing strip is so proportioned that it is entirely covered 1 by 100, ande'mbedded in the base'portion'15 of the strains tendingto fracturethe base portion i crosswise. It is obvious that the reinforcing strip may be of suflicient length to bridge more than one tongue is, and that more than one strip may be provided if desired. Figure 1 shows two reinforcing strips, one in the portion of the casting base between the standards 16 and 17, and the other in the portion between standards 17 and 18.

I find that when the casting shrinks upon the tongued and recessed edge portion of the runner, the shrinkage isliable to distort or impart an undesirable form to the bottom or acting edge of the runner. To prevent ,this objectionable result I impart to both the mold and the runner an abnormal form.

'VVhen the acting edge of the runner is to be substantially straight, in the completed skate, the abnormal form of said edge is as indicated by full lines in Figure 6, said edge having a shght reentrant curvature shown somewhat exaggerated. The abnormal form imparted to the casting is also as indicated by full lines (although exaggerated) in Figure 6, the upper edge of the base portion 15 having a slight salient curvature while the lower edge has a slight reentrant curvature, these curvatures being due to the formation of the mold.

After the casting operation and before the casting has had time to appreciably con- .tract, the casting is removed from the mold and allowed to contract while unconfined. The contraction imparts to the casting and runner the form shown by Figure 1, and by dotted lines in Figure 6, the actingedge of the runner assuming a straight form.

If the acting edge is to have a slight salient curvature in the completed skate, the abnormal form of the mold and runner must be varied to produce this result.

By the method above described I over-' come the only objection known to me to the employment of a runner having a recessed and tongued upper edge portion, viz, the liability of a variation of the acting edge of the runner, from the desired final form, by the shrinking of the casting. this liability being due to the different coefficients of expansion and contraction of the two members of the skate. I claim: 1. A skate comprising a runner having a plurality of tongues projecting from its upper edge and extending in a row longitudi-nally of the runner the ends efsaid tongues being undercut, and a onepiece casting ineluding an elongated base portion cast upon the upper edge portion of the runner and surrounding said tongues, and upstanding foot-supporting standards integral with said base portion.

2. A skate comprising a runner having recesses in its upper edge converting portions of said upper edge into longitudinally extending tongues, the sides of said tongues being flush with the sides of the runner and their ends being undercut to overhang portions of the bottoms of the recesses; and a one-piece casting including an elongated base portion cast upon the upper edge portion of the runner and filling the recesses therein, and upstanding foot-supporting standards integral with said base portion.

3. A skate comprising a runner having a plurality of tonguesprojecting from its upper edge, the ends of said tongues being un dercut, a sheetnietal reinforcing strip engaged at its ends with two of the said tongues and bridging another tongue, and a one-piece casting including an elongated base portion cast upon the upper edge portion of the runner and upon said reinforcing strip, and upstanding foot-supporting standards integral with said base port-ion.

4:. A skate comprising a runner having recesses in its upper edge converting portions of said upper edge into longitudinally extending tongues, the sides of said tongues being flush with the sides of the runner and their ends being undercut to overhang portions of the bottoms of the recesses; a sheet metal reinforcing strip engaged at its ends portion cast upon and interlocked with the upper edge portion of the runner, the runner and casting being composed of metals having different coefficients of expansion and contraction, said improvement consisting in imparting an abnormal form to the runner, forming undercut recesses in the upper edge of the runner and thereby convertin portions of said upper edge into longitudinally extending tongues having undercut ends, imparting an abnormal form to the said casting while forming the same by a mold on the recessed and tongued edge portion of the runner, removing the casting from the mold before substantial contrac tion of the casting, and allowing the'casting to contract while unconfineduthe abnormal form of-the runner and casting being such that the contraction of the casting imparts a predetermined normal form to the casting and the runner. p v v In testimony whereof I have affixed my signature.

CARL B. DREVITSQN.

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