Iм. PROVEMENTS IN ROLLERS USED IN SPINNING MACHINERY
Year: 1871

page_text: anery.
and grant unto me, the said Alexander Melville Clark, Her special
licence that I, the said Alexander Melville Clark, my executors, adminis-
trators, and assigns, or such others as I, the said Alexander Melville
agree with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make, use,
exercise, and vend, within the United Kingdom of Great Britain and
Ireland, the Channel Islands, and Isle of Man, an Invention for "Iм.
PROVEMENTS IN ROLLERS USED IN SPINNING MACHINERY," a communication to
me from abroad by Manuel Leopold Jonas Lavater and Adrien Michel,
both of 13, Boulevart St. Martin, Paris, upon the condition (amongst
others) that I, the said Alexander Melville Clark, my executors or
administrators, by an instrument in writing under my, or their, or
one of their hands and seals, should particularly describe and ascertain
the nature of the said Invention, and in what manner the same was
to be performed, and cause the same to be filed in the Great Seal
Patent Office within six calendar months next and immediately after
the date of the said Letters Patent.

page_text: the desired hardness to the body a of the roller, as well as the necessary
elasticity to the band d.
Another improvement by which the use of fluted metal rollers in
or of any 5
dispensed with consists in making the peripheries of each pair of
rollers concave and convex, of the form shown in Figure 2,
modification of that form, such as an angular ridge or ridges in one
roller, and a corresponding groove or grooves in the other, by which
sufficient frictional surface is obtained to permit of the rollers gearing
together in pairs as shown in Figure 2. The wear of the india-rubber
surfaces of rollers so geared is inconsiderable.
The grooved rollers a, Figure 1, may be made either entirely of
hardened rubber or of gutta percha, or bands of either hard or elastic
rubber may be applied on rollers of metal, wood, or ceramic material
suitably grooved to receive them. The ring of elastic rubber may be
applied on the roller or boss by moulding.
10
1
Figure 3 of the Drawing shows a side view and Figure 4 a top view
of the mould, while Figure 5 shows a central section, and Figure 6 a
plan of same with the cover removed; f, mould formed of a ring of
metal; g, h, top and bottom covers of same held in place by a bolt i,
which also serves for centering the roller in the mould; j, roller (of any 20
suitable material), on the periphery of which a ring of elastic rubber k
is moulded by running it into the space between the periphery of the
roll j and the mould f. The rubber ring is then vulcanized as before,
and where the roller j is of copper the sulphur contained in the rubber
combines therewith to a certain extent and unites the two together.
The inner surface of the mould f may also be fluted, whereby a corre
sponding fluted rubber ring may be formed on the boss as shown at k in
Figure 6. Such rubber rings may also be formed of strips of grooved
rubber to be afterwards applied on the periphery of the roll. The rings
or bands of rubber may also be lined or covered with canvas or other &
suitable fabric.
Having described the nature of the Invention, and the manner of
performing the same, I declare that what I claim as the Invention
to be protected by the herein-before in part recited Letters Patent is
grooving the peripheries of the rolls or bosses used in spinning for