AN IMPROVED COMPOSITION COVERING FOR THE ROLLERS OF PREPARING AND SPINNING MACHINERY
Year: 1879

page_text: LETTERS PATENT to Alexander Melville Clark, of 53, Chancery Lane, in the
County of Middlesex, Patent Agent, for the Invention of "AN IMPROVED
COMPOSITION COVERING FOR THE ROLLERS OF PREPARING AND SPINNING
MACHINERY." A communication from abroad by Charles Pliny Whitney, of
Milford, in the County of Hillsborough, State of New Hampshire, United
States of America.
Scaled the 18th November 1879, and dated the 17th June 1879.
PROVISIONAL SPECIFICATION left by the said Alexander Melville Clark at
the Office of the Commissioners of Patents on the 17th June 1879.
ALEXANDER MELVILLE CLARK, of 53, Chancery Lane, in the County of Middlesex,
Patent Agent. "AN IMPROVED COMPOSITION COVERING FOR THE ROLLERS OF PRE-
PARING AND SPINNING MACHINERY." [A communication from abroad by Charles
Pliny Whitney, of Milford, in the County of Hillsborough, State of New Hampshire,
United States of America.]
In drawing frames, speeders, stretchers, mules, and certain other machines used in
the manufacture of cotton or woollen goods, and particularly in those machines that
take or receive the raw material from the carding machino, it is found that the
electricity developed by the running of the rollers is a source of much trouble and
annoyance by causing the filaments of cotton or wool to adhere to the rollers, and
many unsuccessful attempts have been made to remedy the difficulty. The object
of this Invention is to provide a roller cover that will be wholly unaffected by the
electricity generated in the machine to which it may be attached, and to which
therefore the cotton or woollen filaments will not adhere.
The Invention consists in providing a covering for the holders composed as
follows, that is-Take of fine indiarubber, 25 parts; guttapercha, 20 parts; calcined
magnesia, 10 parts; lamp black, 35 parts; shellac, 5 parts; and sulphur, 5 parts.
These are then to be thoroughly incorporated by grinding, and then at proper tem-
perature are formed by rolling or otherwise into sheets of suitable thickness, which
are cut into strips of required width and folded so that their edges, which are first
chamfered off, may be brought together over a cotton tube which is fitted on a
mandrel, and which is to serve as a lining for the composition tube or covering.
Price Adl

page_text: Then a strip of cotton or other fabric is wound tightly around the strip of composi-
tion, so as to hold it in shape and position while it next is subjected to the process
of vulcanization. On the termination of this process the strip of cloth is removed,
and upon the mandrel will be found a perfect tube lined with cotton possessed
practically of no conductive power, and of a tenacity and rigidity suitable for the
purpose for which it was designed. The tube is then removed from the mandrel,
and may be cut into sections of suitable length and fitted over the rolls, and secured
thereon by suitable cement.
The method herein described for forming the composition into tubes is admirably
adapted to the purpose, but I do not confine myself to it, as other means may be
employed without departing from the Invention. In the composition the shellac
and magnesia neutralise the excessive stickiness of the rubber, the lamp black
destroys its electric conductivity, and the guttapercha enables it to resist tho
deteriorating effect of the lubricating oil with which it may come in contact, hence
it will be seen that the above described composition or compound is possessed
of all the qualities requisite for a non clectric covering for rollers.

page_text: SPECIFICATION in pursuance of the conditions of the Lotters Patent filed by
the said Alexander Melville Clark in the Great Seal Patent Office on the 16th
December 1879.
ALEXANDER MELVILLE CLARK, of 53, Chancery Lane, in the County of Middlesex,
Patent Agent. "AN IMPROVED COMPOSITION COVERING FOR THE ROLLERS OF PRE-
PARING AND SPINNING MACHINERY." A communication from abroad by Charles
Pliny Whitney, of Milford, in the County of Hillsborough, State of New Hampshire,
United States of America.
In drawing frames, speeders, stretchers, mules, and certain other machines used in
the manufacture of cotton or woollen goods, and particularly in those machines that
take or receive the raw material from the carding machine, it is found that the
electricity developed by the running of the rollers is a source of much trouble and
annoyance by causing the filaments of cotton or wool to adhere to the rollers, and
many unsuccessful attempts have been made to remedy the difficulty. The object
of this Invention is to provide a roller cover that will be wholly unaffected by the
electricity generated in the machine to which it may be attached, and to which
therefore the cotton or woollen filaments will not adhere.
The Invention consists in providing a covering for the holders composed as
follows, that is-Take of fine india rubber, 25 parts; gutta percha, 20 parts; calcined
magnesia, 10 parts; lamp black, 35 parts; shellac, 5 parts; and sulphur, 5 parts.
These are then to be thoroughly incorporated by grinding, and then at proper tem-
perature are formed by rolling or otherwise into sheets of suitable thickness, which
are cut into strips of required width and folded so that their edges, which are first
chamfered off, may be brought together over a cotton tube which is fitted on a
mandrel, and which is to serve as a lining for the composition tube or covering.
Then a strip of cotton or other fabric is wound tightly around the strip of composi-
tion, so as to hold it in shape and position while it next is subjected to the process
of vulcanization. On the termination of this process the strip of cloth is removed,
and upon the mandrel will be found a perfect tube lined with cotton possessed
practically of no conductive power, aud of a tenacity and rigidity suitable for the
purpose for which it was designed. The tube is then removed from the mandrel,
and may be cut into sections of suitable length and fitted over the rolls, and secured
thereon by suitable cement.
The method herein described for forming the composition into tubes is admirably
adapted to the purpose, but I do not confine myself to it, as other means may be
employed without departing from this Invention. In the composition the shellac
and magnesia neutralise the excessive stickiness of the rubber, the lamp black
destroys its electric conductivity, and the gutta percha enables it to resist the
deteriorating effect of the lubricating oil with which it may come in contact ;
hence it will be seen that the above described composition or compound is possessed
of all the qualities requisite for a non-electric covering for rollers.
Having described the nature of the said Invention, and the manner of performing
the same, I declare that what I claim as the Invention to be protected by the
hereinbefore in part recited Letters Patent is,-
1st. The within described composition for covering drawing frame, speeder,
stretcher, and mule rollers, consisting of india rubber, gutta percha, calcined mag-
nesia, lamp black, shellac, and sulphur, in the proportions substantially as herein
set forth.
2nd. In a composition for covering drawing frame and speeder rollers, and the
like, the use, substantially as herein described, of lamp black for neutralizing or

page_text: avoiding the effects of electricity, and the adhesion of cotton or wool to the roller,
as herein set forth.
3rd. In a composition for covering drawing frame and speeder rollers, and the
like, the use, substantially as herein described, of shellac, magnesia, gutta percha,
and lamp black in about the proportions named, and for the purposes specified.
In witness whereof, I, the said Alexander Melville Clark, have hereunto set
my hand and seal, this Sixteenth day of December, in the year of our Lord
One thousand eight hundred and seventy nine.
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