Improvements in Driving Chain.
Year: 1887

page_text: Date of Application, 28th Feb., 1887.
Specification Accepted, 17th May, 1887.
Improvements in Driving Chain.
1, WILLIAM MORGAN of Cannon Street, Birmingham in the County of Warwick,
Manufacturer, 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 that class of chain commonly known as drive chain, and
particularly of the kind employed for the driving of velocipedes, although the said
chain, may be used for communicating motion for the driving of machines, for various
purposes; and my said invention is an improvement upon an invention for which
Letters Patent has been applied for by me on the 31st day of May 1886 and
numbered 7234.
I will describe my invention in connection with a velocipede drive clain.
The chain consists of a series of intermediate open sided box like links, through
which connecting pivot pins, or bars pass; and to the outer ends of which said pivot
ping, parallel side links are secured, by riveting; and the space enclosed by the last
named adjacent links, form enclosed gaps or lioles, for the taking upon the teeth of a
drive wheel.
This invention has especial reference to the construction or making up of the before
named open sided links, which are of a flat box-forin; and consists in making the
said links from two or more strips or lengths of sheet metal, respectively shaped into
open jointed thin links placed one within the other, and with the joint or junctions of
the one, in an opposite position to the joint or junctions of the other so that the
joints are broken, or come in front of, or at the back of, the undivided or solid parts
of the two links, which are secured together, and strengthened, by tinning, brazing,.
or galvanizing, or by dipping in "terne metal."
Ör the said intermediate link before named, may have sides, with upper and lower
gapped parts, wherein the Ţ ends of a double T shaped blank, which is to form part
of the link is insarto

page_text: Having described the nature of my invention, I will now proceed to describe
with reference to the accompanying Drawing, the manner in which the same is to be
performed.
Figure 1 represents in plan, partly in horizontal section, a drive chain constructed
according to my invention. Figure 2 is a side elevation of the same, and figure 3 is
a vertical section upon the dotted lines A B figure 1. Figure 4 represents in section,
the outer link or outer blank of a composite intermediate open ended box link, as
described and figure represents the inner link, or inner blank as aforesaid.
Figure 6 represents a like link as before, but with the opposite sides bulged or curved
more inwardly than those as represented in the preceding figures.
The same letters of reference indicate corresponding parts in the several figures.
a a are intermediate open ended box links, made up of two open jointed or open
ended link blanks &, and with the latter of which, fitting within, or accurately
within, the interior of the former, and with the open or enclosed joint or joints a' of
the outer link a², in an opposite position, to the joint or junctions of the other link :
so that the said joints at a are broken by coming in front of, and at the back of the
undivided or solid parts of the links disposed one within the other, or the link blanks
as aforesaid. Thus, these intermediate links are made up of two or more layers
disposed one within the other, and with the open junctions of each layer or blank
breaking joint with the contiguous one; and which breaking joint may be alternate
in any desirable way, according to the kind of links to be formed. These said links,
or the layers composing the links, are next tinned, brazed, or galvanized or dipped
in terne or other suitable metal, which effectually and efficiently connects the layers
together, and forms a sound, strong and efficient link.
bbare alternate side links, and ec are shouldered pins, connecting the intermediate
to the alternate links, the shoulders of which are best seen in the section Figure 1.
Figure 7 represents another form of intermediate link made according to my
invention, and provided with sides. Figure 8 represents a side elevation, and figure!
a plan, side elevation and edge view of the sides separately. Figure 10 represents
the blank for forming the body of the link.
"
In making a link, I take a blank a, with double T cross ends a², and then fold the
blank about its middle, into an open sided and open jointed link, whose inside
boundary edge is of about the conformation or figure of the outside boundary edges
of the sides b. I then insert the double T ends a², which are now in juxta position,
'or nearly so,
into the gaps or recessed parts 63, on the tops of both of the sides d;
and further, on the said Ṭ ends being fully and firmly closed down, and with the said
Tends resting or secured within the recesses before named, a strong, efficient and a
cheap link is thereby produced, which may be used with, or without being tinned,
galvanized, brazed or otherwise coated or covered with a coating metal, and the link
thus treated, subsequently finished in a shaking barrel.
The sides have pin or axis holes 3, through which the shouldered ends of the
pins e pass and are riveted, after having been passed as usual through the alternate
links d.
The sides of the gaps may if necessary be dovetailed as represented in figure 9.
Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed, 1 declare that what I claim is.—
Firstly, Making or constructing the links, or the intermediate links of drive chains,
from two or more, or a series of open jointed and independent inner & outer links, or
turned up blanks, arranged or fitting within each other, upon each other, or one
within the other; and with the joints or junctions of the meeting edges of the
respective parts disposed or arranged in opposite positions: so that the joints or
junctions aforesaid come in front of, and at the back of the undivided or solid parts
of the adjacent and contignous parts, or blanks, and break joint, substantially as
described and set forth in figures 1, 2, 3, 4, 5 and 6 of the drawing.
Secondly. Making chain links or enclosed sided chain links, from a double T ended
blank or strip of sheet metal, bent or folded at or about its middle, into the shape

page_text: required, and with the meeting T ends of the said blank, taking and fitting into the
open gaps or recesses (dovetail or straight) on the top edges or on the bottom edges
of the sides of the link, substantially as described and set forth in figures 7, 8, 9,
and 10..
Lastly. Connecting and securing together the parts of composite or made up chains
links, as hereinbefore described & illustrated, by tinning, galvanizing, or by brazing
or by dipping the said articles in terne metal as described and set forth, whereby the
said links are greatly strengthened, and the nonacting surfaces thereof protected from
corrosion.
E