AN IMPROVED CONSTRUCTION OF PUMP
Year: 1854

page_text: LETTERS PATENT to Lionel John Wetherell, of Compton Street, Clerken-
well, in the County of Middlesex, Civil Engineer, and Augustus Johann
Hoffstaedt, of Albion Place, in the County of Surrey, Agent, for the
Invention of "AN IMPROVED CONSTRUCTION OF PUMP'
Sealed the 3rd April 1855, and dated the 16th October 1854.
PROVISIONAL SPECIFICATION left by the said Lionel John Wetherell
and Augustus Johann Hoffstaedt at the Office of the Commissioners of
Patents, with their Petition, on the 16th October 1854.
We, LIONEL JOHN WETHERELL, of Compton Street, Clerkenwell, in the
County of Middlesex, Civil Engineer, and AUGUSTUS JOHANN HOFFSTAEDT, of
Albion Place, in the County of Surrey, Agent, do hereby declare the nature
of the said Invention for "AN IMPROVED CONSTRUCTION OF PUMP" to be as
follows:-
This Invention relates to a novel arrangement of mechanical parts for
transmitting the reciprocating action to pump rods, chiefly applicable to ships'
pumps and other force pumps.
Affixed to the pump barrel is a horizontal bracket guide, which receives a
traversing fulcrum pin projecting from the pump handle. This handle is
jointed to a central pin of an arrangement of levers, constructed on the lazy-
tongs principle, which pin traverses in a vertical guide attached to
the pump

page_text: barrel. This lazy-tongs arrangement is carried by bearing pins at opposite
sides of the pump barrel, and to its upper end the piston rod of the pump is
connected. When, therefore, the pump handle is vibrated, a lengthened stroke
of piston due to the moving fulcrum of the handle and the lazy-tongs lever
will be effected. To prevent the sticking of the pump valves and the clogging
of the pump, it is proposed to employ conical floating valves, which will act
freely, and be little liable to injury from the introduction of foreign substances
into the pump barrel.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Lionel John Wetherell and Augustus Johann Hoffstaedt in
the Great Seal Patent Office on the 16th April 1855.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, LIONEL
JOHN WETHERELL, of Compton Street, Clerkenwell, in the County of Middlesex,
Civil Engineer, and AUGUSTUS JOHANN HOFFSTAEDT, of Albion Place, in the
County of Surrey, Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixteenth day of October, in the year of our Lord
One thousand eight hundred and fifty-four, in the eighteenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us, the
said Lionel John Wetherell and Augustus Johann Hoffstaedt, Her special
license that we, the said Lionel John Wetherell and Augustus Johann Hoff-
staedt, our executors, administrators, and assigns, or such others as we, the
said Lionel John Wetherell and Augustus Johann Hoffstaed, 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 "AN IMPROVED CONSTRUCTION OF PUMP," upon the
condition (amongst others) that we, the said Lionel John Wetherell and
Augustus Johann Hoffstaedt, by an instrument in writing under our hands
and seals, or under the hand and seal of one of us, 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.

page_text: NOW KNOW YE, that I, the said Lionel John Wetherell, (on behalf of
myself and of the said Augustus Johann Hoffstaedt,) do hereby declare the
nature of our said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement, reference being had to the Drawing hereunto annexed, and to the
letters and figures marked thereon (that is to say) :-
:-
This Invention (which is applicable chiefly to ships' pumps and other force
pumps) relates to a novel arrangement of mechanical parts for transmitting
the reciprocating action of pump handles to pump rods, the object being to
obtain, without interfering with the compactness of the pump, a greater length
of stroke than it has hitherto been found convenient to give to pumps worked
by hand. In the accompanying Drawing we have shewn our improved
mechanism for effecting this object, as applied to a single action pump.
Fig. 1 is a side elevation of a pump fitted according to our Invention;
Fig. 2 is a front view of the same; Fig. 3 is a vertical section, taken at nearly
the middle of the pump; and Fig. 4 is a sectional plan view of the pump,
taken in the line 1, 2, of. Fig. 1.
The improvement consists essentially in the employment of a lazy-tongs
arrangement of levers for transmitting the reciprocating motion of the pump
handle to the piston rod. a, a, is the pump barrel, to the cover of which two
short levers b, b, are jointed. The upper ends of these levers 6 are jointed to
the levers c, c, respectively, which work upon an axle d, that slides in parallel
vertical guides e, cast on the cover of the pump barrel. The levers c, c, are
connected together by a pair of levers f, f, which are jointed to the piston
rod g by
pin h. This rod is provided with a slot, to permit of the
passage through it of the travelling axle d, which is supported by arms i, i,
pendent from the crank lever k, k.
21
The crank lever or pump handle works on a fulcrum pin carried by the
standard 7, which is itself bolted to the pump barrel. It will now be under-
stood, that on a vibratory motion being imparted to the pump handle k, the
axle d will, through the agency of the pendent arms i, i, be moved up and
down in the vertical guide e, a distance corresponding to the vibration of the
short arm of the pump handle. At the same time the arrangement of lazy-
tongs levers b, c, and f, will be caused to assume alternately the expanded and
contracted positions, shewn respectively at Figures 1 and 3, and by reason of
the piston rod 9 being connected to the top pair of levers ff, the piston of that
rod will make strokes equal in length to the distance travelled by the con-
necting pin h. By this means we are enabled to facilitate the lifting of water
and other fluids, less rapidity of manual action being required to produce a

page_text: given amount of work than by the ordinary mode of transmitting the vibratory
motion of the pump handle to the plunger. To prevent the sticking of the
. pump valves and the clogging of the pump, we propose to employ, in lieu of
clack valves, conical floating valves, formed as shewn at m, Fig. 3, which will
act freely, and be little liable to injury from the introduction of foreign
substances into the pump barrel.
Having now set forth the nature of our Invention of "An Improved Con-
struction of Pump," and shewn the manner of carrying the same into effect,
we wish it to be understood. that, under the above in part recited Letters
Patent, we claim, transmitting a reciprocating motion to pump rods in the
manner and for the purpose above.explained.
In witness whereof, I, the said Lionel John Wetherell, have hereunto
my hand and seal, the Sixteenth day of April, in. the year of our
Lord One thousand eight hundred and fifty-five.
Witness,
FRED. WALKDEN,
66, Chancery Lane.
L. J. WETHERELL. (L.8.).