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Full text of "MODE OF WORKING THE PISTONS OF PUMPS - United States Patent 697"

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Specification of Letters Patent No. 697, dated April 14, 1838.

To all whom it may concern:

Be it known that I, David Whittier, of Belfast, in the county of 
Waldo and State of Maine, have invented a new and Improved 
Application of Power to Pumps; and I do hereby declare that the 
following is a full and exact description.

The nature of my invention consists in the application of 
inclined planes, inserted upon the outer circumference of a wheel 
or cylinder, (which is made to revolve like the capstan of a 
vessel), to the spear or piston of a pump so as to force it up 
and down. To enable others skilled in the art to make and use my 
invention I will proceed to describe its construction and 

I construct a vertical barrel or cylinder, of wood or metal, of 
any given diameter, and of sufficient width to raise and depress 
the spear or piston the distance desired (see A, in the 
accompanying drawing). Upon the bottom of this barrel or 
cylinder, I place rollers, or small wheels, upon which it is to 
revolve. Through the center of the cylinder a metallic spindle is 
inserted, which is firmly placed in the floor or deck or platform 
around which spindle the cylinder revolves. If this spindle be 
constructed, as it may be, like that of the common ship's 
capstan, the cylinder may revolve upon it, as does a ship's 
capstan, in which case the wheels upon the bottom may be omitted. 
Upon the outer circumference of the cylinder, I attach, firmly, 
four metallic plates, B, B, alternately ascending and descending, 
from the upper to the lower edge of the same, forming inclined 
planes, alternately up and down and projecting out sufficiently 
for the small friction wheels, C, C, attached to the spear or 
piston rod, R, D, of the pump, to roll upon. Four pumps, or a 
greater or less number, are then placed around said cylinder, and 
so near thereto as that the friction wheels attached to the spear 
or piston, shall run upon said metallic plates—I attach the 
friction wheels, to the spears or pistons, by means of a short 
arm or projection E E extending from the spears or pistons. I 
then apply to the cylinder, power enough to put it in motion. 
This may be simply the lever or capstan bar, or wind, steam, or 
horse power. The friction-wheels, attached to the spears or 
pistons of the pumps, running upon the ascending metallic plates, 
raise the spears or pistons, until said wheels meet the lower 
surface of the descending plates, (the ends of which extend a 
little above the ascending plates so as to catch the wheels upon 
the lower surface of the descending plates) by which the spear or 
piston is forced down, when the wheels again meet the ascending 

The cylinder, having the metallic plates affixed thereon may be 
permanently attached to the capstan of a vessel without 
inconvenience; or it may be made to ship and unship to a capstan, 
at pleasure.

Instead of inclined planes upon the periphery, as above 
described, grooves may be formed in the periphery of the vertical 
cylinder, having the proper direction, and admitting the friction 
rollers attached to the piston rod, by which means a like effect 
will be produced.

What I claim as my invention, and desire to secure by Letters 
Patent, is—

In the manner herein described of raising and depressing the 
piston rods of pumps, by attaching inclined planes, or sections 
of an helix to the periphery of a vertical cylinder, to operate 
substantially in the manner set forth, I also claim, as a 
modification of the same principle, the forming of grooves, 
having the same inclination as that given to the said planes, so 
as to receive the friction rollers attached to the piston rods, 
and to operate them in a similar manner.


Witnesses: Albert Smith, Annie Smith.