IMPROVEMENTS IN PAPER MAKERS' RAG OR PULP ENGINES
Year: 1863

page_text: LETTERS PATENT to Benjamin Lambert, of 35, Lothian Road, Camberwell
New Road, in the County of Surrey, for the Invention of "IMPROVEMENTS
IN PAPER MAKERS' RAG OR PULP ENGINES."
Sealed the 2nd November 1868, and dated the 18th May 1868.
PROVISIONAL SPECIFICATION left by the said Benjamin Lambert at
the Office of the Commissioners of Patents, with his Petition, on the
18th May 1868.
I, BENJAMIN LAMBERT, of 35, Lothian Road, Camberwell New Road, in
the County of Surrey, do hereby declare the nature of the Invention for
"IMPROVEMENTS IN PAPER MAKERS' RAG OR PULP ENGINES," to be as
follows:-
⚫ This Invention has for its object improvements, in paper makers' rag or
pulp engines. For these purposes, in order more effectually and advantageously
to carry off the water from a rag or pulp engine, a hollow partition is applied
in the flow side of an engine, which divides the stream or flow of the stuff-in
the engine into two streams. The sides of the hollow partition-are formed of
sheet metal, perforated with numerous holes, or of other suitable reticulated or

page_text: perforated material. In addition to such hollow perforated partition the sido
of the midfeather and of the engine on the flow side may, as has heretofore
been proposed, be hollow, and made suitable for straining off the water. In
order more effectually to boil the stuff in a rag or pulp engine provision is
made for preventing the flow of air under the cover and above the stuff in the
engine, which is ordinarily caused by the action of the beating roller of the
engine, and this is effected by means of an axis or roller having radial float
boards, which axis or roller is above the fluid in the engine; at the end of the
cover of the engine a flexible or yielding curtain is so arranged that the float
boards, which, as they revolve dip into the stuff, are caused to move at a some-
what quicker speed than the flow of the stuff in the engine, whilst the air is
prevented flowing under the cover and between it and the stuff by the float
boards or paddles which are above the fluid coming in succession against the
flexible or yielding curtain.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Bejamin Lambert in the Great Seal Patent Office on the
18th November 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, BENJAMIN
LAMBERT, of 85, Lothian Road, Camberwell New Road, in the County of
Surrey, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Iler Letters
Patent, bearing date the Thirteenth day of May, in the year of our Lord
One thousand eight hundred and sixty-three, in the twenty-sixth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said Benjamin Lambert, Her special licence that I, the said
Benjamin Lambert, my executors, administrators, and assigns, or such
others as I, the said Benjamin Lambert, 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 PAPER MAKERS' RAG OF PULP
ENGINES," upon the condition (amongst others) that I, the said Benjamin
Lambert, my executors or administrators, by an instrument in writing under

page_text: 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 Benjamin Lambert, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the follow-
ing statement thereof:-
This Invention has for its objects improvements in paper makers' rag or
pulp engines. For these purposes, in order more effectually and advantageously
to carry off the water from a rag or pulp engine, a hollow partition is applied
in the flow side of an engine, which divides the stream or flow of the stuff' in
the engine into two streams. The sides of the hollow partition are formed of
sheet metal, perforated with numerous holes, or of other suitable reticulated or
perforated material. In addition to such hollow perforated partition the side
of the midfeather and of the engine on the flow side may, as has heretofore
been proposed, be hollow, and made suitable for straining off the water. In
order more effectually to boil the stuff in a rag or pulp engine provision is
made for preventing the flow of air under the cover and above the stuff' in the
engine, which is ordinarily caused by the action of the beating roller of the
engine, and this is effected by means of an axis or roller having radial float
boards, which axis or roller is above the fluid in the engine; at the end of the
cover of the engine a flexible or yielding curtain is so arranged that the flont
boards, which, as they revolve, dip into the stuff, are caused to move at a some-
what quicker speed than the flow of the stuff in the engine, whilst the air is
prevented flowing under the cover and between it and the stuff by the float
boards or paddles which are above the fluid coming in succession against the
flexible or yielding curtain.
Having thus stated the nature of my said Invention, I will proceed more
fully to describe the manner of performing the same.
DESCRIPTION OF THE DRAWINGS.
Figure 1 shews a longitudinal section of a paper makers' rag or pulp
engine having my improvements applied thereto; Figure 2 shews a longi-
tudinal section thereof, taken through the flow side of the engine; Figure 3
shews a transverse section; Figure 4 shews a plan of the engine partly in
section; and Figure 5 shows part of a longitudinal section full size in order

page_text: more clearly to represent part of my Invention. In each of these Figures the
same letters are used to indicate the same parts.
a, a, is a hollow perforated partition, which is formed or fixed in the flow
side of the engine; this partition is composed of finely perforated sheet metal
or wire
gauze. b is a pipe and cock, through which water passing into the
hollow partition may be drawn off therefrom, and the speed at which the
water is allowed to flow off may be readily regulated by the cock. If desired,
the side of the midfeather and the side of the engine and other parts of the
engine may, as heretofore, be formed with perforated metal or wire gauze or
other suitable material, so as to strain off the water at such parts in addition
to the partition a, a. In order to prevent air flowing under the cover c, c, of
the beating roller of a rag or púlp engine when applying steam pipes or other
apparatus for heating the stuff in such engine, I use a roller d, having radial
floats or projections d', d, and I communicate motion from the axis of the
beating roller or otherwise to the axis of such roller d, in order that the
floats d' may be caused to dip into the stuff, and move.at speed somewhat
greater than the flow of the stuff, and thus not to prevent the free flow of
the stuff. e is a flexible curtain, which I prefer to be of vulcanized india-
rubber, against which one or more of the floats.or projections are constantly in
contact, so as to prevent air passing into the covered chamber within which
the beating roller works.
The steam pipes or other apparatus used for heating the stuff in the engine
may be arranged as heretofore, or in any convenient manner, for obtaining the
requisite heat for boiling the stuff. e², e², are, as heretofore, two perforated
plates or screens of wire gauze, capable of being slid between the parallel
inclined guides into and from the positions shewn in Figure 1; and f,f, are
two solid or close screens, which are capable of being slid into and out of the
positions shewn in Figure 1. When the screens f. f, are in these positions,
the stuff thrown against them by the beating roller will fall off and descend
into the engine; but when the screws f. f, are raised out of the way
the stuff will be thrown against the screens e, e', and part of the water
will pass through such screens, and descend into and flow away by the
gutters g, g.
Having thus described the nature of my Invention and the manner of
performing the same, I would have it understood that what I claim is,—
First, the construction of paper makers' rag or pulp engines with hollow
partitions a, a, in the flow side of the engines.
And, secondly, I claim the constructing paper makers' rag or pulp engines

page_text: so as to prevent the beating rollers drawing air into the covered chambers, as
herein described.
In witness whereof, I, the said Benjamin Lambert, have hereunto set my
band and seal, this Twelfth day of November, in the year of our Lord
One thousand eight hundred and sixty-three.
B. LAMBERT. (L.S.)