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Publication numberUS1531862 A
Publication typeGrant
Publication dateMar 31, 1925
Filing dateJan 30, 1922
Priority dateJan 30, 1922
Publication numberUS 1531862 A, US 1531862A, US-A-1531862, US1531862 A, US1531862A
InventorsLarned William A
Original AssigneeDayton Steel Racquet Company
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Metal stringing for tennis rackets
US 1531862 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

March 31, 1925. 1,531,862

W. A. LARNED METAL STRINGING FOR TENNIS RACKE'I'S Filed Jan. 30, 1922 Patented Mar. 31, 1925.

unirao srarss rATEnr-oFF cEf WILLIAM A. LABNED, 0F SUMMIT, NEW JERSEY. ASSIGNOR TO THE DAYTON STEEL I RACQUET CQMPANY, 0F DAYTON, OHIO, A CORPORATION OF OHIO.

METAL STRINGING- FOR TENNIS RACKETS.

Application filedJanuary 30, 1922. Serial No. 532,753.

To all whom it may concern.-

Be it known that I. WILLIAM A. LARNED, a citizen of the United States, residing at Summit, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in a Metal Stringing for Tennis Rackets, of which the following is a specification.

The principal object of my invention is to provide for tennis rackets and the like a metal stringing which is cheap and durable. and extremely resilient and yielding.

The invention contemplates a stringing which comprises a plnralit of strands of wire so coiled. braided or wound that they will easily vield when stretched, and there after readily return to their original form. The resiliency or spring of the stringing is mainly due to the fact that when it is stretched under the impetus of the ball, it will decrease in diameter as it lengthens by virtue of the coiling, braiding or winding of its metal. strands, although it may be assisted by the extension of the metal itself.

To facilitate the decrease in the diameter of the stringing when stretched, the metal strands of which it is composed are coiled, braided. or wound to leave a hollow center. However, a center for the coiled, braided or wound strands making up the metal stringing, may be employed if it consists of a material which will withstand a certain amount of compression, thereby allowing the stringing to decrease in diameter as it lengthens.

In the accompanying drawings. Figure 1 is a plan view of the head and throat portion of a tennis racket, showing my metal stringing employed therein. Figure 2 is a side elevational view of said stringing coiled around a central core. Figure 3 is a cross section taken through the same. Figure 4 is a side elevational view of said stringing with a hollow center. Figure 5 is a cross section taken through the wire strands comprising said stringing, to show its hollow center. Figure 6 is a side elevational view of a braided stringing before being extended under the impetus of theball, and Figure 7 is a side elevational view of said stringing after being stretched under the impetus of the ball, showing how said stringing has decreased in diameter.

Throughout the specification and draw-'- ings, similar reference characters denote corresponding parts.

In the accompanying drawings, the numeral 1 designates the head portion, and

2 the throat portion, of a tennis racket frame made of metal, wood or other suitable material. Strung in this frame in any suitable manner is'a stringing 3 which preferably comprises a number of strands 4 of steel wire or other suitable metallic material. While I have shown six of said strands, any greater or less numbermaybe employed. i

The strands 4 of wire are so coiled or wound that they will easily give or yield when stretched and thereafter readily return to their original form. The coiled strands as'they lengthen, decrease in diameter to give the stringing which they con-' stitute its extreme resiliency under the impetus of the ball. In order that the diameter of the stringing mav readily decrease as it lengthens, the metal strands of which it is composed are coiled or wound to leave a hollow center 5. (See Figure However, a center 6 composed of fabric or other material which will withstand a certain amount of compression, may be employed if desired. (See Figures 2'and 3.)

In Figures 6 and 7 I have shown a stringing consisting of braided strands 7, showing in Figure 6 the stringing before it is extended, and in Figure 7 the same stringing after it has been stretched under the impetus of the ball. In the latter figure the decrease in diameter of the stringing after it has been stretched, is shown. The same contraction occurs in the stretched wire strands, or in those of any other metallic material of whichthe stringing is composed, when it is coiled or wound as I have hereinbefore described.

I do not wish to be limited to the details of construction and arrangement herein shown and described, and any changes 0r modifications may be made therein with- Wires spirally inter'wound around an elasin the scope of the subjoined claims. tic center. 10 Having described my invention, I claim: In testimony whereof I have hereunto set 1. A tennis racket having an elastic metal my hand this 26th day of January, 1922.

5 stringing comprising a number of Wires Wound together. to leave a hollow center. WILLIAM A. LARNED. 2. A tennis racket having an elastic l Vitness: metal stringing comprising a plurality of HOWARD S. SMITH.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3075344 *Jun 24, 1960Jan 29, 1963United States Steel CorpDouble twisted strand and method of making the same
US3851456 *Jul 24, 1973Dec 3, 1974Nippon Seisen Co LtdAntistatic yarn consisting of a mixture of metallic and nonmetallic fibers
US4231575 *Dec 23, 1977Nov 4, 1980Mers KuttRacket stringing
US4577256 *Sep 25, 1984Mar 18, 1986Semtronics CorporationWoven stretchable grounding strap
US4639825 *Dec 2, 1985Jan 27, 1987Semtronics CorporationStretchable grounding strap having redundant conductive sections
US4745519 *Jan 12, 1987May 17, 1988Semtronics CorporationGrounding strap which can be monitored
US4782425 *Jan 23, 1987Nov 1, 1988Semtronics CorporationConductive elastic strap closure
US4813459 *Oct 19, 1987Mar 21, 1989Semtronics CorporationStretchable material having redundant conductive sections
US4909510 *Feb 3, 1989Mar 20, 1990Sahatjian Ronald ASports racquet netting
US5004425 *Oct 10, 1989Apr 2, 1991Jes, L.P.Magnetic snap assembly for connecting grounding cord to electrically conductive body band
US5049425 *Jan 4, 1989Sep 17, 1991Abany International CorporationPorous yarn for OMS pintles
US5576924 *Jul 31, 1995Nov 19, 1996Hee; RolandHeel grounding device
US6215639Sep 3, 1999Apr 10, 2001Roland HeeAdjustable, electrically conductive bracelet
US6707659Jun 18, 2002Mar 16, 2004Roland HeeHeel grounder
US7609503Nov 12, 2007Oct 27, 2009Roland HeeInsulated metal grounding bracelet
US8808121May 15, 2013Aug 19, 2014Wilson Sporting Goods Co.Racquet configured with fewer cross strings than main strings
US9089743May 15, 2013Jul 28, 2015Wilson Sporting Goods Co.Racquet configured with fewer cross strings than main strings
US20090073631 *Sep 19, 2007Mar 19, 2009Roland HeeElectrically conductive band
US20090122457 *Nov 12, 2007May 14, 2009Roland HeeInsulated metal grounding bracelet
US20100238601 *Jun 4, 2010Sep 23, 2010Roland HeeElectrically conductive band
US20110164342 *Mar 18, 2011Jul 7, 2011Roland HeeElectrically conductive band
DE1150913B *Nov 5, 1959Jun 27, 1963Vojtech VodickaStahlarmierte Saite fuer Ballschlaeger
WO1981001797A1 *Dec 11, 1980Jul 9, 1981A CadonauGuts for tennis rackets and similar games
WO1990008575A1 *Jan 30, 1990Aug 9, 1990Sahatjian Ronald ASports racquet netting
Classifications
U.S. Classification473/543, 57/200, 57/222, D21/730, 29/896.9, 57/225
International ClassificationA63B51/00, A63B51/02
Cooperative ClassificationA63B51/00, A63B51/02
European ClassificationA63B51/00, A63B51/02