AN IMPROVED PRESS
Year: 1860

page_text: LETTERS PATENT to John Talbot Pitman, of the American and European
Patent Offices, No. 67, Gracechurch Street, London, for the Invention of
"AN IMPROVED PRESS."-A. communication from abroad by Messrs. Bourn,
Brown, and Chaffee, of Providence, in the State of Rhode Island, one
of the United States of America.
Sealed the 25th January 1861, and dated the 3rd August 1860.
PROVISIONAL SPECIFICATION left by the said John Talbot Pitman at the
Office of the Commissioners of Patents, with his Petition, on the
3rd August 1860.
I, JOHN TALBOT PITMAN,. of the American and European Patent Offices,
No. 67, Gracechurch Street, London, do hereby declare the nature of the said
Invention for "AN IMPROVED PRESS," a communication to me from Messrs.
Bourn, Brown, and Chaffee, of Providence, in the State of Rhode Island, one
of the United States of America, residing abroad, to be as follows:-
It consists in constructing the press with an upper and lower stationary bed
plate, having between them mounted upon one or more revolving screws, or
in any other manner to effect the same object a follower, which is operated by
any suitable device, driven by hand or other motive power, so that while
removing the pressure on one side of the follower it can be communicated to
new matter on the other. "When used for vulcanizing india-rubber or other
similar material under pressure the bed plates and follower are hollowed and

page_text: heated by steam, and the dies containing the material and forming a metallic
jacket are placed between the follower and one of the bed plates alternately, so
as to have, when desired, one set always under operation.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Talbot Pitman, in the Great Seal Patent Office on the
2nd February 1861.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
TALBOT PITMAN, of the American and European Patent Offices, No. 67,
Gracechurch Street, London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Third day of August, in the year of our Lord
One thousand eight hundred and sixty, in the
year of Her
reign, did, for Herself,. Her heirs and successors, give and grant unto me,
the said John Talbot Pitman, Her special licence that I, the said John Talbot
Pitman, my executors, administrators, and assigns, or such others as I, the said
John Talbot Pitman, or my executors, administrators, and assigns, should at
any time agree with, and no others, from time to time and at all times there-
after 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 "AN
IMPROVED PRESS," a communication from Messrs. Bourn, Brown, and Chaffee,
of Providence, in the State of Rhode Island, one of the United States
of America, upon the condition (amongst others) that I, the said John
Talbot Pitman, 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.
NOW KNOW YE, that I, the said John Talbot Pitman, do hereby declare
the nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement, reference being had to the Drawing hereto annexed as part of this
Specification :-
It consists in constructing a press with an upper and lower stationary bed
plate, having between them mounted upon one or more revolving screws, or in

page_text: any other manner effecting the same object, a follower, which is operated so
that while removing the pressure on one side of the follower it can be com-
municated to new matter on the other, and in having the bed plates and
follower hollow.
A, A, represent the stationary bed plates, connected and securely attached by
rods a, a, a, a; the follower B is fitted to slide upon these rods, and furnished
with female screws cut for the screws C, C, which are prolonged so as to have
their ends connected to the bed plates; one of these ends project through one of
the plates, so as to receive geer wheels D, D;. these wheels play into a smaller
one E on the same shaft with a pulley or crank F, to be turned by hand or
other power. The screws in their revolution raise or lower the follower, but in
order to keep it steady are confined at the other end, and prevented from
leaving that bed plate.
To furnish the heat necessary for vulcanizing the india-rubber or other
material under the action of the press, the bed plates and follower are cast
hollow, and are furnished with steam by means of pipes attached to each, and
regulated in the ordinary manner by cocks. It is intended to be operated as
follows:-The substance to be vulcanized is placed upon moulds or dies
formed in part and counterpart in two corresponding metallic plates, or in any
other way, and between the two plates is pushed in between the follower and
one of the bed plates when the pressure and heat are applied for the necessary
length of time. When ready to be removed the other side of the follower
receives another set, and the pressure in being withdrawn from the finished
matter is immediately applied to the new without loss of time, so that one
charge is constantly under treatment.
Having now described the nature of the Invention as communicated to me,
and the manner of its operation, what I claim and desire to secure under the
herein-before in part recited Letters Patent is, the construction and use of a
press, substantially as described, for moulding and treating with heat a
substance simultaneously, or for simply moulding it, or for other
purpose.
In witness whereof, I, the said John Talbot Pitman, have hereunto set
my hand and seal, on this Third day of December, Anno Domini
One thousand eight hundred and sixty.
JOHN TALBOT PITMAN. (L.S.)