1920-02-19

Abstract of GB138307 138,307. Seignol, E. Jan. 25, 1919, [Convention date]. Flexible shafts. - A cylindrical link 1 for a flexible transmission shaft is formed by bending a sheet-metal blank, Fig. 1, and has at each end two openings 3 and a cross-bar 2. The links 1 may be coupled together by a double hook 4. The blank may be so formed that the openings and tongue at one end of the link will not lie in the same plane as those at the other end.

4

1920-02-19

B21L15/00 ; F16C1/04 ; B21L15/00 ; F16C1/00

B21L15/00 ; F16C1/04

GB19190019600 19190808

FRT506178 19190125

FR506178 (A)

1	Improvements in or relating to the manufacture of flexible transmission shafts
	Inventor: SEIGNOL EDOUARD	Applicant:
	EC:B21L15/00; F16C1/04	IPC: B21L15/00; F16C1/04;B21L15/00(+1)
	Publication info: FR506178 A - 1920-08-16
2	Improvements in or relating to the manufacture of flexible transmission shafts
	Inventor:	Applicant: EDOUARD SEIGNOL
	EC:B21L15/00; F16C1/04	IPC: B21L15/00; F16C1/04;B21L15/00(+1)
	Publication info: GB138307 A - 1920-02-19

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to beperformed, I declare that what I claim is:-

1. A method of manufacturing links for flexible transmission shafts, by

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converting a. metal blank into a member ofs hollow cylindrical form, the shape of the blank being such that the said member will have at each endthereof two coincident holes and an associated transversely disposed stopelement, for the purpose specified.

2. A method of manufacturing links for flexible transmission shafts, by converting a metal blank into a member of hollow cylindrical form, the shape of the blank being such that the holes at opposite ends of the hollow cylindrical member are associated with transversely disposed stop elements and are so located as to he intersectedeitherby a single plane or by two planes containing theaxis of the said member.

3. Hollow cylindrical links for flexible transmission shafts, constructed from metal blanks whose shape is substantially as described with reference to

Figure 1. or Figure 4 of the accompanying drawing.

4'.A flexible transmission shaft constructed substantially as described with

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reference to '1t11'8 of the accompanying drawing.'

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COMPLETE SPECIFICATION.

Improvements in or relating to the Manufacture of Flexible

Transmission Shafts.

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I, 7;notr,wn SEIG1OL, of .1.2, Avenue de Madrid, Nenilly-sur-Seine, near Paris, in the Republic of France, Manufacturer, do hereby declare the nature of this invention and in what manner the same is to be performed, tobe particularly described and ascertained in and by the following statement:-

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This Invention relates to the manufacture of flexible ti'anxiii;;sion shafts of the kind in which hollow cylindrical links are employed, the chief object being to enable such links to be assembled without the necessity of boring holes or employing riveted pins.

According to this invention certain of the links(preferably alternate ones)

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are made in one piece from a met.;)! blanic the shape of which is such that by converting the blank into a member of hollow > cylindrical form two coincident holes and an associatedtransversely disposed stop element are provided at each end thereof to enable other links having hook-like ends to bearticulated to the said hollow cylindrical links, the aforesaid holes at the opposite ends being so located as to be intersected by a single plane or by two planes containingthe

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axis of the llol'low cylindrical link.

In order that thesaidinvention may he clearly understood and readily carried into effect the same will now be described more fully with reference to theaccompanying drawing, in which:-

Figure .I is an elevation of one of the blanks from which the hollowcylin-

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drical links are formed.

Figure 2 shows a hollow cylindrical link made from (he aforesaid blank.

Figure gel shows a portion of a nexible shaft in winch the bellow cylindrical lÏ1)(8-are assembled together by means of hook-like links of 1010wll form, and Figure 4 is an elevation of a modified form of 111an1;.

Referring first to Figures ) .1 to a3, the blank 1 which may be of the shape indicated ill Figure 1. is provided with tongues 2, 2. and notches 3, 3, :3, 3, which are so disposed that when the blank is rolled, pressed or otherwise operatedupon tobring the edges 1a of the blank intoengagement with or closely contiguous to one another,,and the tongues 2,2 subsequently bent over at right angles, there is Constitute(] a hollow cylindrical member or link having coincident boles 3, 3 (Figure 2) at opposite ends thereof forenabling links 4(Figure 3) havingbook-like ends to be articulated thereto, the hook-like ends passing through the said holes and the tongue, 2, 2 affording stops and advan-tageously replacing theconnecting' pins heretofore employed. In flexible shaftsconstructed as described, the longitudinal stresses are almost. nil, the

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transmission stresses being exerted only on the sides of the holes 3, 3 so that the bent tongues are amplySilfllctC7lt to keep thelinks coupled together. As shown, the blank is' so formed that the holes at opposite ends of the hollow cylindrical link (Figure 2) are so located as to he intersected hy a single plane containing- the axis of the said link, and alternate hollowcylindricallink,:C]i'gU1'e 3) are coupled together by means of intermediate linkshaving hook- like ends disposed at right angles to each other. It is obvious, however, that, without affecting the method of manufacture, the blank could so he formed that the holes at opposite ends of the hollow cylindrical link would he so located as to be intersected by different planes containing the axis of the said link.

In that event, all that would beiiece.4iiii-3,. wouldbe to make a slight chauge

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in the shape of the blank, no longel'lil'sllcllig 'it. symmetrical. There are advan- tages inassembling links made fromun symmetrical blanks, should it be desired to obtain curves of a very small radius, as by this method there maybe obtained a shorter length of the straight rigid portion in one plane.An

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example of an 11l1symmetrical blink is )shown in Figure 4, in which the tongues 2, 2 may occupy the position indicated by full lines or the position indicated by dotted lines.