IMPROVEMENTS ת Ann Dean on ATTEND
Year: 1853

page_text: LETTERS PATENT to Isaac Rider, of Bristol, in the County of
Somerset, Brass Founder, for the Invention of "IMPROVEMENTS
ת
Ann Dean on ATTEND
"
Sealed the 29th September 1853, and dated the 29th March 1853.
PROVISIONAL SPECIFICATION left by the said Isaac Rider at the
Office of the Commissioners of Patents, with his Petition, on the
29th March 1853.
I, ISAAC RIDER, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN COCKS FOR DRAWING OFF BEER OR OTHER LIQUIDS"
to be as follows:-
I call my Invention an improved pressure tap or cock worked by
eccentric action. Its nature consists in the application of the varying
leverage of an eccentric for the purpose of shutting and opening a
plug tap by pressure. Round the plug a ring of galvanized India
rubber is annexed, for the purpose of rendering the contact more per-
fect when the pressure takes place. The action by turning the key
half round will be to cause a vertical lever to bring the eccentric as far
out as the axis of the tap as the leverage will allow; removing the pres-

page_text: sure from the shoulder, and opening the cock a half turn in the con-
trary direction, will cause an equal length of play in the opposite
direction; the pressure will again take place, and the tap be hermeti-
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Isaac Rider, in the Great Seal Patent Office, on
the 29th September 1853.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
ISAAC RIDER, of Bristol, in the County of Somerset, Brass Founder,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Ifer
Letters Patent, bearing date the Twenty-ninth day of March, in the
year of our Lord One thousand eight hundred and fifty-three, in the
sixteenth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Isaac Rider, Ier special licence that I,
the said Isaac Rider, my exccutors, administrators, and assigns, or
such others as I, the said Isaac Rider, my executors, administrators,
and assigns, should at any time 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 "IMPROVEMENTS IN COCKS FOR DRAW-
ING OFF BEER OR OTHER LIQUIDS," upon the condition (amongst others)
that I, the said Isaac Rider, by an instrument in writing under my
hand and seal, 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 Isaac Rider, do hereby declare
the nature of my said Invention, and in what manner the same is to

page_text: be performed, to be particularly described and ascertained in and by the
following statement, reference being had to the accompanying drawing
forming part of this my Specification, and to the letters of reference
thercon.
The nature of my Invention consists in the application of the
shifting or varying leverage of an excentric, cam, elliptical, or other slot
motion, or by other mechanical means, such as the screw wedge or lever,
for the purpose of shutting by pressure or opening a plug: round this
plug a ring of galvanized India rubber, or other convenient and proper
material, shewn at i, in the annexed drawing, is attached, for the pur-
pose of rendering the contact more perfect when the pressure takes
place. In the annexed drawing, Figure 1, is an elevation of a tap or
cock drawn to the full size, with a portion removed, to show the verti-
cal action of the key, which, in the instance illustrated by the said
drawing, is made to act on an excentric; but I wish it to be understood
that the key can be made to act on any other excentric or elliptical,
parabolic or hyperbolic, or other shaped cam, or other means devised
for obtaining pressure by the application of shifting or varying lever-
ages, the drawing giving only one mode of effecting mechanically, by
means of an excentric, the required pressure; and Figure 2, is a plan
partly in horizontal section, shewing the excentric motion. The vertical
cap a, in which fits the key b, is furnished with a vertical lever c, by
which motion is communicated to the excentric cam, elliptic slot, or
other mechanical means, by pressure at right angles to the planc
in which it works. A horizontal view of the excentric action, which, as
herein-before stated, can be varied in form and construction, is given
in the plan at e, e, and its vertical section in Figure 1. It has a longi-
tudinal play in the direction of the axis A, A', of the tap, which commu-
nicates the back and fore motions to the plug f. The projection at g,
is used as a guide to ensure the parallelism of the play. The action by
turning the key half round will be to cause the vertical lever c, to
bring the excentric motion, or cam, or other mechanical arrangement
introduced for the purpose, as far out towards A', as the provision madle
for the maximum play of the leverage will allow, removing the pressure
entirely from the shoulder h, and opening the tap: a half turn in the

page_text: opposite direction will cause an equal length of play in the opposite
direction A; the pressure will again take place. and the tap be hermeti-
cally closed. A circular piece or washer of leather is introduced be-
tween the working surfaces of the plate of the collar a, and the upper
screw joint of the tap, as shewn in vertical section in Figure 1. This
prevents the contact of the working parts of the metal.
Having now described and detailed the nature of my Invention, and
one of the modes I employ for carrying the same into practical effect,
I would observe that I lay no claim to any of the parts taken
separately, but only as in combination; and I claim the application of
the direct action of the key of a tap or cock at right angles to the
plane of an excentric, elliptic, or other cam, serew, lever, or other me
chanical means, for opening and shutting a horizontal plug furnished
with a ring of galvanized India rubber, or other suitable material, by
which means I obtain a greater amount of flow of liquid when the tap
open, and more perfect contact when it is shut.
is
In witness whereof, I, the said Isaac Rider, have herein-before
affixed my hand and seal, this Twenty-third day of September,
in the year of our Lord One thousand eight hundred and
fifty-three.
Witness, BENJ MORRIS,
Bedminster, Bristol.
ISAAC RIDER. (L.S.)