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Publication numberUS1901562 A
Publication typeGrant
Publication dateMar 14, 1933
Filing dateDec 26, 1928
Priority dateDec 30, 1927
Publication numberUS 1901562 A, US 1901562A, US-A-1901562, US1901562 A, US1901562A
InventorsStewart Main Norman
Original AssigneeStewart Main Norman
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Golf club
US 1901562 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

N. S. MAIN GOLF CLUB March 14, 1933.

Filed Dec. 2", 1928 FIG. I.

Patented Mar. 14, 1933 UNITED STATES NORMAN s'rnwnm' MAIN, or nmmrneowsoornnnn GOLF CLUB,

Application filed December 2c, 1928, Serial No. meant-a Great Britain December 30,1927.

This invention relates to the heads of golf clubs. I have found that if'a ball is centre of the club face and swerves while travellingthrough the air, while a ball hit off the heel of the club head-diverges to the other side, and that this efiect is due to the twisting of the club head on impact.

In my invention I minimize or eliminate this divergence by the combination of two features of construction eachof which by itself has been previously adopted in a golf club, viz

(l) by constructing the club head of a light material and forming it with a heavier heel and toe with the object of giving it the maximum moment of inertia about its vertical axis of rotation under impact, that is, about a vertical axis which passes through or close to the centre of gravity of the club head, and (2) by making the striking face slightly cylindrical, the curvature being approximately a small segment of a large cylinder 5 with a vertical axis.

produced by the separation of the added,

The heel and toe of the club head may be loaded by the known method of inserting weights away from the central portion of the striking face. As much effect as possible is weights and the curvature of the face is kept as slight as possible. On account of the weight of the shaft of the club the loading at the toe is made greater than at the heel.

My invention is applicable to either putters or drivers or other similar clubs. In the case of a driver, the heel and toe may be made heavier by the known method of inserting a plug of lighter material in the central portion of the club head, for example, by boring a recess in the central portion of the club head and filling said recess with a lighter material. 7

The accompanying drawing illustrates two examples of golf club heads constructed according to my invention.

Fig. 1 is a plan view and Fig. 2 a face view of a putter. Fig. 3 is a plan view of a driver.

Referring to Figs. 1 and 2, it will be seen part of the face.

that the" club headhas its striking face A large diameter; The heel and toe of the club headare loaded by weights B inserted in recesses extending upwards from the sole of the club, the recesses being closed by metal plates C secured'to-the sole of the club head which is recessed so that the metal plates C are flush on the surface with the sole ,of the club head. 1

In the driver shown in Fig. 3, the striking face is a convex surface A which-forms part of the surface of a vertical cylinder of large diameter and the club head is loaded at the heel and toe by weights B inserted in V recesses closed by metal sole plates C' similar to those described -with reference to Figs.

l and 2.

The curvature required varies with the shape and weight of the'club head and may be found'by mounting-astraight faced club loaded-as above specified on an axis which is fixed at right angles to the grip and in the same plane as the club face. The club is rotated on the said axis by mechanical means and the extent of the diver 'ence of the flight of a ball struck successively with different parts of the face is noted. From this, the curvature necessary to correct the divergence may be approximately calculated and 'aclub with this curvature can then be c I tested and corrections made on the curvature until the best curve isfound to procure an approximately straight shot from any In the case of a club which does not raise the ball from the ground, the curvature required is a concave one, in the case of a club whichelevates the ball into the air, the desired curvatureis found to be a convex one. o

The curvature required to give perfect correction is not truly cylindrical, but apparticularly at the heel.

I claim. i

proximates more towards a parabolic curve,

1. A golf club head comprising a heavier heel and toe portion than central portion to;

increase'the moment of inertia'of the club' head aboutits vertical axis of rotation under PA ENT" opnc v struck. from said face.

8. A golf club head comprising a heavier heel and toe portion than central portion to p 7 increase the mom'entof inertia of the'club I head about its vertical axis of rotation under 7 impact, in combination with a striking' face curved about a vertical axis;,the,curvature being such as to"impar't an approximately straight motion to a ball struck from any part of the fa-ce.

4.115; golf club head comprising a heavier heel and toe portion than central portion to increase the moment of inertia of the club head abouta verticalaxis' passing approxi mately through the centre of gravity of. the club head, in combination With a striking face Whose surface, forms part of a vertical cylinder of large diameter. l

5. A golf club head as, claimed in claim 4 having a concave striking face I A golf club head comprising a heeland v V toe portion loaded to obtain the maximum momentof inertia of the club head about a vertical axis passing approximately through the centre of gravity of the club head, in

combination With a striking face Whose surface forms part of a vertical cylinder of large diameter. I .v

The foregoing specification signed at Glasgow this 11th day of December, 1928.; v NORMAN STEWVART MAIN.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3625518 *May 23, 1969Dec 7, 1971Solheim KarstenGolf club head with complex curvature for the sole and/or the striking face
US3866922 *Nov 24, 1972Feb 18, 1975Vincent C MarciGolf putter with imbedded alignment indicator
US3897066 *Nov 28, 1973Jul 29, 1975Belmont Peter AGolf club heads and process
US3923308 *Sep 17, 1973Dec 2, 1975Mills Truett PSlotted golf putter
US3941390 *Apr 26, 1972Mar 2, 1976Douglas HusseyHeel and toe weighted golf club head
US3955820 *Jul 20, 1973May 11, 1976Acushnet CompanyGolf club head
US3966210 *Feb 11, 1969Jun 29, 1976Rozmus John JGolf club
US3995857 *Feb 11, 1976Dec 7, 1976Acushnet CompanyGolf club head
US3995858 *Feb 11, 1976Dec 7, 1976Acushnet CompanyGolf club head
US3995864 *Feb 11, 1976Dec 7, 1976Acushnet CompanyGolf club head
US3995865 *Feb 11, 1976Dec 7, 1976Acushnet CompanyGolf club head
US4063733 *Aug 17, 1971Dec 20, 1977Benedict Mark CGolf club
US4508350 *Sep 29, 1982Apr 2, 1985Duclos Clovis RGolf club head
US4655459 *Dec 4, 1985Apr 7, 1987Antonious A JGolf club head
US4898387 *Dec 27, 1988Feb 6, 1990Finney Clifton DGolf clubhead with a high polar moment of inertia
US5141230 *Aug 10, 1990Aug 25, 1992Antonious A JMetal wood golf club head with improved weighting system
US5273283 *Jul 13, 1992Dec 28, 1993Pro Group, Inc.Golf club head with sleeved cavity
US5322285 *Nov 23, 1992Jun 21, 1994Turner Terry SGolf putter
US5366223 *Oct 28, 1993Nov 22, 1994Frank D. WernerGolf club face for drivers
US5482281 *Feb 17, 1995Jan 9, 1996Karsten Mfg. Corp.Golf putter head
US5827130 *Nov 2, 1995Oct 27, 1998Jimenez; Rafael F.Tail heavy golf putter
US6896625 *Aug 13, 2003May 24, 2005Macgregor Golf CompanyHigh moment of inertia putter having adjustable weights
US6929559 *Jun 2, 2003Aug 16, 2005Macgregor Golf CompanyHigh moment for inertia putter having three weights
US7048639 *Feb 4, 2004May 23, 2006Macgregor Golf CompanyHigh moment of inertia putter
US7115041Aug 6, 2004Oct 3, 2006Callaway Golf CompanyPutter-type golf club head with an insert
US9630080 *Jun 24, 2016Apr 25, 2017William A. LanyiPutter alignment apparatus
US20040138003 *Aug 13, 2003Jul 15, 2004Grace Robert M.High Moment of Inertia Putter Having Adjustable Weights
US20040166953 *Feb 4, 2004Aug 26, 2004Grace Robert M.High moment of inertia putter
US20050119069 *Aug 6, 2004Jun 2, 2005Guard John G.Putter-type golf club head with an insert
US20090111603 *Oct 26, 2007Apr 30, 2009Edward RomeroParabolic golf club head
USD621458Mar 31, 2010Aug 10, 2010Karsten Manufacturing CorporationGolf club head
USD621459Mar 31, 2010Aug 10, 2010Karsten Manufacturing CorporationGolf club head
USD621460Mar 31, 2010Aug 10, 2010Karsten Manufacturing CorporationGolf club head
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USD621891Mar 31, 2010Aug 17, 2010Karsten Manufacturing CorporationGolf club head
USD623709Mar 31, 2010Sep 14, 2010Karsten Manufacturing CorporationGolf club head
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USD644703Dec 15, 2010Sep 6, 2011Karsten Manufacturing CorporationGolf club head
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USD792536Mar 14, 2016Jul 18, 2017Karsten Manufacturing CorporationGolf club head
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USD796605Jun 8, 2016Sep 5, 2017Karsten Manufacturing CorporationGolf club head
WO1998023337A1 *Feb 20, 1997Jun 4, 1998Ralph Maltby Enterprises, Inc.Heel/toe weighted golf putters and methods of making heel/toe weighted golf putters
Classifications
U.S. Classification473/330
International ClassificationA63B53/04
Cooperative ClassificationA63B53/04
European ClassificationA63B53/04