Improvements in Pitch Chains.
Year: 1893

page_text: Date claimed for Patent under Sect. 103 of Act,
being date of first Foreign Application (in 9th July, 1000
France),
Date of Application (in United Kingdom), 27th Jan., 1899
Complete Specification Left, 27th Jan., 1898-Accepted, 4th Mar., 1893
France),
TOL
Approval
ww
Date of Application (in United Kingdom), 27th Jan., 1893
Complete Specification Left, 27th Jan., 1893-Accepted, 4th Mar., 1893
COMPLETE SPECIFICATION.
Improvements in Pitch Chains.
I, CHARLES ALEXIS SÉBIN, of 33 Rue de l'Orillon, Paris, France, Chain
Maker, do hereby declare the nature of this invention and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement :-
My invention relates to an improvement in the construction of pitch chains
wherein each joint comprises an inner bush or tubular distance pieco uniting the
outer pair of links and scoured thereto by a centre rivet pin, an outer bush or
tubular distance piece uniting the inner pair of links and turning on the first-
mentioned bush, and a sleeve or friction roller turning freely upon the latter bush.
Reference is to be had to the accompanying drawings, forming part of this
Specification, Figure 1 of which represents a face view of a portion of the improved
pitch chain. Figures 2, 3, and 4, are sections taken on lines 1-2, 3–4, and 5—6
respectively.
The links b, b, of each outer pair are united at each end by a bush or tubular
distance piece c of tempered steel, borod to receive a centre pin a and having a flat
or flats (as shewn in Figures 3 and 4) at one or both ends on which fit the corre-
spondingly shaped openings in the links 6 which are firmly secured by the steel
centre pin a, rivetted at onch end over a washer g. Upon each bush c as a joint-pin
another sleeve d also of tempered steel is fitted to turn and has a flat or flats at one
or both extremities on which fit the correspondingly shaped apertures in the ends
of the inner pair of links e, e, so that the links and bush d turn as one on the
bush c. The flats on the bushes c and may be formed in any couvenient mannor
but preferably by milling. is an outer sleeve or friction roller also of tempered
steel which turns freely upon bush d between the links e, e. The bush by its
shouldered ends acts as a distance piece in conjunction with the rivetted pin a to
connect and hold the links b, b, at the proper distance apart and the links b, bush c,
and pin a, turn together as one, the strain being divided between the bush and pin,
instead of being wholly borne by the latter whereby greatly increased strength is
obtained and elongation of the chain is considerably reduced. The inner pair of
links e, e, are connected together by the sleeve d which by its shouldered ends also
acts as a distance piece to maintain the links at a proper distance apart.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is―
The herein described improved construction of pitch chain whereof each joint is
constituted by a bush e having a flat or flats at one or both ends fitting in the
apertures of the outer pair of links so that the links and bush turn as one the bush
being traversed longitudinally by a pin a rivetted over washers; a bush d fitted to
turn on c and having a flat or flats at one or both ends fitting in apertures in the

page_text: iuner pair of links e, e, so that that the links and bush turn as one; and a friction
roller or sleeve floose on bush d, substantially as heroin specifled.
Dated this 27th day of Jannary 1893.
By A. M. and Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.
By A. M. and Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.