Improvements in Driving Chains, and in Wheels for the same.
Year: 1896

page_text: Date of Application, 20th July, 1896
Complete Specification Left, 20th Apr., 1897-Accepted, 22nd May, 1897
PROVISIONAL SPECIFICATION.
Improvements in Driving Chains, and in Wheels for the same.
We, JOHN FORD WHITEHEAD and JOSEPH HENRY WHITEHEAD, both of 74 Poveril
Street, Lace Draughtsmen, and MORITZ ROTHSCHILD, of 39 Queon's Road, Lace
Merchant, all in the Town and County of the Town of Nottingham, do hereby declare
the nature of this invention to be as follows:-
This invention is designed to provide an improved driving chain and wheel, which
although specially devised for cycles is applicable to other purposes. By the
construction about to be described, the pull of the chain takes place from the middle
of the links, and not from the ends thereof, as is usual, thus a more efficient driving
action is obtained than heretofore with loss friction and wear of the parts than is the
case with chains and chain wheels as ordinarily made.
To this end, the chain wheel consists of two discs or cheeks provided on their
periphery with suitably shaped and corresponding recesses, and between these discs
or cheeks the chain runs, instead of running on the outer periphery, as with ordinary
wheels. The said chain is provided with transverso projecting pins or rods which
engago in the aforesaid recesses in the edges of the discs or cheeks, and these pins or
rods pass through holes arranged centrally in the links of the chain. They are
provided at their middle with an enlargement or boss which fits between the links and
so prevents the pins or rods moving endwise, whilst leaving them free, however, to
turn on their axes to accommodate themselves to the movements of the chain.
The recesses in the edges of the discs or cheeks of the wheel are preferably of
V shape, so that the said pins or rods only touch the sides thereof at two points. A
suitable form of edgo for the said dises or cheeks has a series of semi-circular scallops
or teeth around it, which, where they meet, form tho V shaped recessos before
referred to; but these teeth may be of any other suitable shape.
On the inner side of each tooth, is a projecting stud, or hoss, with a rounded head,
and these studs or bosses serve as guides or distance pieces to keep the chain from
coming into contact with the inner faces of the discs or cheeks and setting up
unduo wear and friction.
The discs or cheeks may be secured by screw bolts, or rivets, to an enlargement or
boss formed on, or mounted on, the axle round which they rotate.
20th day
ошу 1000.
ERNEST DE PASS,
Chartered Patent Agent,
78 Fleet Street, London, and 5 Market Street, Nottingham,
Agent for the Applicants.

page_text: Improvements in Driving Chains, and in Wheels for the same.
We, JOHN FORD WHITEHEAD and JOSEPH HENRY WHITEHEAD, both of 74, Peveril
Street, Lace Draughtsmen, and MORITZ ROTHSCHILD, of 39 Queen's Road, Lace
Merchant, all in the Town and County of the Town of Nottingham, 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,
referenco being had to the accompanying drawings and to the letters and figures
marked thereon, that is to say :-
This invention is designed to provide an improved driving chain and wheel,
which although specially devised for cycles is applicable to other purposes. By the
construction about to be described, the pull of the chain takes place from the middle
of the links, and not from the ends thereof, as is usual; thus a more efficient driving
action is obtained than heretoforo, with less friction and wear of the parts than is the
case with chains and chain wheels as hitherto constructed.
And in order that our invention may be readily understood, we will describe the
same fully with reference to the accompanying drawings, in which:
Fig. 1 is an elevation of one of the links of our improved driving chain, drawn
to an enlarged scale, and Fig. 2, is a plan thereof.
Fig. 3 is a side view of the improved driving chain-wheel for use in conjunction
with said driving chain, and Fig. 4, is an edge view thereof.
Figs. 5 and 6 are a side olevation and plan, respectively, of the combined chain
and wheel.
The arrangement shewn in the above figures is more particularly applicable to
cycles and like vehicles.
In carrying out our invention, we provide each link of the chain with a transverse
pin or axle a projecting through holos formed contrally in the side plates a of such
link. The projecting portions of the pin or axle are adapted to lie between the teeth
of the chain-wheel, which are specially contrived for their reception, as hereinafter
described. The pin or axle a' has mounted or formed upon it, at its middlo, a boss
or enlargement a² which fits between the side plates a, and prevents end wise
movement of the said pin or axle, while, however, leaving it free to turn and so
accommodate itself to the movements of the chain.
b, b, are the usual blocks or connecting pieces between the links.
By means of this construction of link, it will be readily understood that the pull on
the chain will take place from the middle of the links and not from the ends thereof,
as is now the case with ordinary driving chains, and that with less friction.
The chain-wheel for use in conjunction with our improved driving chain, herein
above described, consists of two discs or cheeks e, cl, between which the chain runs
instead of running on the outer periphery, as with ordinary chain-wheels. These
discs or cheeks c, c, are secured to a hub or central boss c by screw-bolts or rivets e,
and said hub or boss may be formed on, or mounted on, the shaft or axlo on
which it rotates. Or the discs and boss may be formed integrally from a solid piece
of steel, or other suitable metal. The periphery of each disc is provided with
correspondingly shaped teeth c', so cut as to leave between them a recess of V shape,
and so ensure that the pins or axles a' which lie in such recesses shall touch only
on the sides of the teeth at two points thereof, as clearly seen in Fig. 5. In the
drawings, the teeth shewn are semicircular so that they form the V recess between
them, but we do not limit ourselves to this particular shape, as we may employ any
other, provided a V, or analogous recess be formed between the teeth for the purpose
above mentioned.

page_text: On the inner face of each tooth, is a projecting stud or boss d with a rounded
head. These serve as guides or distance pieces to keep the chain from coming into
contact with the inner faces of the discs and setting up undue wear and friction.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same may be performed, we declare that what we
claim is :
1. A driving chain having each link provided with a centrally arranged pin or
axle projecting through the side plates and carrying, at its middle, a boss or enlarge-
ment between said side plates, substantially as and for the purpose set forth.
2. In driving chains, links consisting of the side plates a, transverse projecting
pins or axles a capable of rotating therein and adapted to lie between the teeth of
the chain wheel, and a boss a² on the middle of said pins or axles to prevent end wise
movement of these latter, substantially as described and shewn.
3. A driving chain wheel consisting of two parallel discs or cheeks arranged on
each side of a hub or central boss and formed with teeth having a V or like shaped
recess between them to receive the projecting ends of the pins or axles of the chain
links, the inner faces of each tooth being provided with a projecting stud or the like,
substantially as and for the purposes described.
4. The improved driving chain and chain wheel, constructed, arranged, and
combined substantially as hereinbefore described and as shewn in the annexed
drawings.
ERNEST DE PASS,
Chartered Patent Agent,
78, Fleet Street, London, and 54, Market Street, Nottingham,
Agent for the Applicants.