US1848374A - Golf club shaft - Google Patents

Description

March 8, 1932 R. MORGAN GOLF cLupi SHAFT Filed June 11. 1930 Patented 8, 1932 ROBERT MORGAN, or WEST nanrronco, comznc'rrcur cons. cnun smr Application filed June 11,

and filling the dedendum spaces and covering. the addendum sections of thecorrugated part of the core with a composition or compound which is hard and somewhat elastic and that will be retained in place by the core and at the same time will strengthen thecore and provide a smooth exterior, casing therefor.

In the accompanying drawings Fig. 1

shows a side elevation of a club with a shaft 1 made according to this invention. Fig. 2 is a side view of the core of the shaft. Fig. 3 on larger scale shows a section of the core on the plane indicated by the dotted line 33 on Fig. 2. Fig. 4 is an enlarged section of the core on the plane indicated by the dotted line 4:'4= on Fig. 2. Fig. 5 is an enlarged section of the core on the plane indicated by the dotted line 5-5 on Fig. 2. Fig. 6 shows on still larger scale a section of the core and casing on the plane indicated by the dotted line 66 on Fig. 1.

In the views 1 indicates the shaft, 2 the handle which may be any approved type, and 3 the head of desired shape and weight, a wooden head being shown although the invention is equally applicable to a club having a metal head. The tubular corrugated core 4; is formed. of thin sheet metal, preferably carbon steel. This core may havethe handle section 5 straight and the remaining section 6 tapered from full size at the end of the handle section to the end that is inserted in theclub head.

In manufacturing this'core rectangular corrugations of gradually increasing depth.

from said handle portion to said head, and

s HEISSUE-D.

1930. Serial a... 460,841.

and gradually decreasing width are made in the portion of a flat piece of sheet metal which is to be between the handle and head of the finished club. This piece is then curved into tubular form and.its edges brazed. When this corrugated piece is thus curved the in.- ner edges 7 of the addendum sections are brought together so that the addendum sections become dovetails 8 which will hold the composition in the channels 9 between them. When the core has been completed the dedendum spaces are filled in and the addendum sections are covered with a com ound or composition 10 such as fibroid or ba elite,

which when set is hard and durable, but has 0 some elasticity. A-core formed in this manner while stiff is capable of some torsional yield and as a result of the dovetail formation of the addendum sections of the core the encasing composition is firmly held in place.

The invention claimed is: 1. A .golf club shaft comprising a substantially cylindrical tubular metallic handle portion and a shaft portion integral therewith including a tubular core having its ex- I ternal diameter decreasing from the handle portion toward the head end and having corrugations therein providing external ribs which decrease in width and increase in depth an enclosing and stiffening case of composition covering said core and extending from said handle portion to the head and having inwardly directed ribs filling the externalgrooves of said corrugations between the ribs of said core. I

2. A golf club shaft comprising a substantially cylindrical tubular metallic handle portion and a shaft portion integraltherewith having its external diameter decreasing from the handle portion toward the head end and having corrugations therein providing external grooves which gradually increase in depth from the cylindrical handle portion to said headend so that the torsional yield of the shaft portion increases from the handle portion to the head end.

3. A golf club shaft comprisin a substantially cylindrical tubular metallicfiiandle por- 5 tion and a shaft portion integral therewith having its external diameter decreasing from the handle portion toward the head end and having corrugations therein providing external ribs which decrease in width and external grooves which increase in depth from said handle portion to said head end.

ROBERT MORGAN.

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