IMPROVED MECHANISM FOR IMPARTING RECIPROCATING
Year: 1858

page_text: LETTERS PATENT to Robert Clegg, of Islington, in the County of
Middlesex, Frederick Angerstein, of Kennington, in the County of
Surrey, and George Ferry, of Hackney, in the said County of Middlesex,
for the Invention of "IMPROVED MECHANISM FOR IMPARTING RECIPROCATING
Sealed the 21st June 1859, and dated the 22nd December 1858.
PROVISIONAL SPECIFICATION left by the said Robert Clegg, Frederick
. Angerstein, and George Ferry at the Office of the Commissioners of
Patents, with their Petition, on the 22nd December 1858.
We, ROBERT CLEGG, of Islington, in the County of Middlesex, FREDERICK
ANGERSTEIN, of Kennington, in the County of Surrey, and GEORGE FERRY, of
Hackney, in the said County of Middlesex, do hereby declare the nature of the
said Invention for "IMPROVED MECHANISM FOR IMPARTING RECIPROCATING MOTION
TO MACHINERY, AND MORE ESPECIALLY PUMPS," to be as follows:-
This Invention consists in imparting reciprocating motion to machinery, and
especially pumps, by means of one or more cams of novel and peculiar con-
struction fixed on a shaft, the object sought to be attained thereby being to
economize power and time; for example, suppose the same to be applied to
pumps, instead of employing an ordinary crank or other similar mechanical
contrivance, in which only one half of its entire revolution is effectively
employed for lifting the pump bucket, and the other half of its revolution is
absorbed in the descent of said bucket; it is proposed by this Invention to so
construct a cam as that about three-fourths of its entire revolution shall be

page_text: effectively employed for lifting, and the other fourth for the descent of the
bucket; or instead of lifting and descending only once during each revolution
of the said cam, the same may be made to lift and descend twice in each entire
revolution thereof, or even more times, if desirable, according to the size of
the n am
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
.
by the said Robert Clegg, Frederick Angerstein, and George Ferry in
the Great Seal Patent Office on the 22nd June 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, ROBERT
CLEGG, of Islington, in the County of Middlesex, FREDERICK ANGERSTEIN,
of Kennington, in the County of Surrey, and GEORGE FERRY, of Hackney, in
the said County of Middlesex, send greeting.
WHEREAS Her inost Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-second day of December, in the year of our Lord
One thousand eight hundred and fifty-eight, in the twenty-second year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us,
the said Robert Clegg, Frederick Angerstein, and George Ferry, Her special
licence that we, the said Robert Clegg, Frederick Angerstein, and George
Ferry, our executors, administrators, and assigns, or such others as we, the
said Robert Clegg, Frederick Angerstein, and George Ferry, our 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 "IMPROVED MECHANISM FOR IMPARTING RE-
CIPROCATING MOTION TO MACHINERY, AND MORE ESPECIALLY PUMPS," upon the
condition (amongst others) that we, the said Robert Clegg, Frederick
Angerstein, and George Ferry, our executors or administrators, by an instru-
ment in writing under our or their hands and seals, or under the hand and
seal of cne of us or them, 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 we, the said Robert Clegg, Frederick Angerstein,
and George Ferry, do hereby declare the nature of the said Invention, and in

page_text: what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement thereof, that is to say:-
Our Invention consists in imparting reciprocating motion to machinery, and
more especially pumps, by means of one or more cams of novel and peculiar
construction, fixed on a shaft, the object sought to be attained thereby being
to economize power and time. For example, supposing this Invention to be
applied to pumps, instead of employing an ordinary crank or other similar
mechanical contrivance, in which only one half of its entire revolution is
effectively employed for lifting the pump bucket, and the other half of its revolu-
tion is absorbed in the descent of said bucket, we propose, by means of our
said Invention, to so construct a cam as that about three-fourths of its entire
revolution shall be effectively employed for lifting, and the other fourth for the
descent of the bucket; or instead of lifting and descending only once during
each revolution of the said cam, the same may be made to lift and descend
twice in each entire revolution thereof, or even more times if desirable,
according to the size of the cams.
In order to explain our said Invention as completely as possible, we now
proceed to describe the best means we are acquainted with for carrying the
same into practical effect, reference being made to the illustrative Drawings
or Diagrams hereunto annexed, and to the numeral figures and letters of
reference marked thereon respectively, as follows:-
DESCRIPTION OF THE DRAWINGS.
Figure 1 exhibits a Diagram illustrative of the construction of a cam
according to our said Invention, intended to effect the lifting and descent of
the pump bucket once during each entire revolution of such said cam;
Figure 2 exhibits the construction of a cam according to our said Invention,
intended to effect the lifting and descent of the pump bucket twice during
each entire revolution of such said cam.
At each of the foregoing Figures and Diagrams, we employ similar letters of
reference to denote corresponding parts in so far as such parts appear or can be
seen at each of such said Figures respectively. A denotes the position of the
boss of the cam through which the shaft is to pass for imparting rotary motion
to the cam, which should be firmly fixed thereon; B is a groove or channel
formed of parallel width throughout; into this groove a roller C fits easily, to
which the pump rod is connected by a pin; or they may be two of such said
grooves or channels B, one at each side of the cam, so that the pump rod may
be formed forked, and thus embrace the two rollers C; the vertical movement
of the pump rod may be preserved by guides suitably placed and connected to

page_text: the framing employed to support the driving shaft. a, a, a, a, mark the centres
from which the groove or channel B is struck or described; and b, b, denote
the points of junction of the said several arcs of circles. The lines marked
1, 2, 3, 4, at Figure 1, denote the division of the cam into four parts; those
parts marked 1, 2, 3, as the cam rotates when in use, effect the lifting of the
pump rod and bucket connected thereto, and that marked 4 effects the
descent of the said bucket. At Figure 2, the curved portions between 5, 6,
mark the lifting parts of the cam, and those portions between 6 and 7 mark
the descending portions of the cam. The rollers C might be so arranged and
adjusted as to be lifting a pump rod at one side of the cam during the descent
of another pump rod at the other side of the cam, so as to maintain a con-
tinuous flow of water. This arrangement, however, would only be necessary
when one cam is employed, as when more than one cam is employed then the
said cams may each be so fixed on the driving shaft as to produce the same
effect of maintaining a continuous flow of water. We would here remark, that
we have found it desirable to make these cams of the best malleable cast iron
to insure sufficient strength thereof at the least cost.
Having now fully described and set forth the nature and object of our said
Invention of "Improved Mechanism for Imparting Reciprocating Motion to
Machinery, and more especially Pumps," we would observe, in conclusion, that
it will appear obvious to any practical mechanic that the above mode of
imparting reciprocating motion to machinery may be adopted to a variety of
different purposes in which the descending stroke of the mechanism is required
to be attended with as little loss of time as is practicable.
In witness whereof, I, the said George Ferry, one of the Parties
hereto, have hereunto set my hand and seal, this Twenty-second day
of June, in the year of our Lord One thousand eight hundred and
fifty-nine
GEORGE FERRY. (L.S.)
Witness,
BENJ. BROWNE, Patent Agent,
52, King William Street, London Bridge.