Improvements in Wheels and Pinions for Driving Velocipedes by Means of Chains, or for other analogous purposes.
Year: 1896

page_text: Date of Application, 3rd Feb., 1896
Complete Specification Left, 31st Oct., 1896-Accepted, 19th Dec., 1896
PROVISIONAL
Improvements in Wheels and Pinions for Driving Velocipedes by
Means of Chains, or for other analogous purposes.
I, JAMES YATE JOHNSON of 47 Lincoln's Inn Fields in the County of London,.
Gentleman do hereby declare the nature of this invention (which has been com-
municated to me from abroad by Ernest Joubert of 58 Chaussée d'Antin Paris in
the Republic of France) to be as follows:-
This invention has for its object to provide wheels and pinions such that there
can be employed for driving purposes on ordinary roads, chains which hitherto.
have been only capable of use upon the track the said chains having links formed.
so that the teeth of the wheels and pinions enter into them.
According to this invention the periphery of the wheel, or pinion, is provided
with teeth each of which has, at its base, a table, or support, for the chain, which.
table, or support, is not continued between the teeth, the periphery of the wheel,.
or pinion, at those parts being of less radius, and being thinned, or angled, outwards
so that it has an outer angular edge somewhat of knife form. The front and rear
parts of the teeth are angled inwards so that mud brought up by the chain does
not adhere but is at once caused to fall away from the wheel or pinion. The.
wheels and pinions may have central parts of any construction suitable to fit them.
for the particular type of machine with which they may be used.
Dated this 3rd day of February 1896.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.
Improvements in Wheels and Pinions for Driving Velocipedes by
Means of Chains, or for other analogous purposes.
I, JAMES YATE JOHNSON, of 47 Lincoln's Inn Fields, in the County of London.
Gentleman do hereby declare the nature of this invention a communication to
me from abroad by Ernest Joubert of 58 Chaussée d'Antin, Paris, in the
Republic of France and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement:-
This invention to which the name of "Immerclean" has been given has for its
object to provide means for using in a practical and easy way for driving purposes.
on ordinary roads, flat or block chains such as are known as Humber or Perry
chains or the like, which up to the present have been used with good effect, only
on tracks.
In the annexed drawing
Fig. 1 is a perspective view of part of a pedal crank shaft wheel designed to
co-operate with the flat chains aforesaid.

page_text: Fig. 2 is a similar view showing a portion of the chain engaged with the teeth of
the wheel.
Fig. 3 is a similar view of part of the pinion on the hub of the driving wheel
with a portion of the chain engaged therewith.
Fig. 4 is a perspective view of a link of the chain.
Figs. 5 and 6 are views of one of the teeth of the wheel or pinion.
According to this invention the cylindrical part which forms the rim in ordinary
toothed wheels and pinions for this purpose is only preserved near the tooth A in
order to form about its base a kind of table or support BCDE for the chain.
This rim is not afterwards continued between the teeth but replaced by an annular
part F of less radius and thinned outwards, so that it has an outer angular edge
somewhat of knife form. The sides of the base of the tooth and the surfaces of the
rim are angled in such a way that mud brought up by the chain G does not adhere
but is at once caused to fall away from the wheel or pinion.
The wheels and pinions may have central parts of any construction suitable
for fitting them for the particular type of machine with which they may be
used.
The important feature of this invention is to provide pinions with special rims
which are interrupted and formed with combined surfaces.
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 :-
(1.) Wheels and pinions for driving velocipedes by means of chains or for other
analogous purposes, having their rims made with interrupted surfaces substantially
as and for the purpose set forth.
(2.) In a wheel or pinion for driving velocipedes, by means of chains or for
other analogous purposes, the combination with a rim of teeth thereon having
about their bases, table like supports B C D E of greater radius than the said rim
substantially as and for the purpose set forth.
Dated this 29th day of October 1806
JAMES Y. JOHNSON.