ImPROVEMENTS IN PROPELLERS
Year: 1870

page_text: LETTERS PATENT to Charles Kinzler and Adam Keppler, both of
the City of New York, in the United States of America, Engineers,
for the Invention of “ImPROVEMENTS IN PROPELLERS.”
COMPLETE SPECIFICATION filed by the said Charles Kinzler and
Adam Keppler at the Office of the Commissioners of Patents, with
their Petition and Declaration, on the 2nd February 1870, pursuant
to the 9th Section of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, CHARLES:
KINZLER and ADAM KEPPLER, both of the City of New York, in the
United States of America, Engineers, send greeting.
WHEREAS we are in possession of an Invention for "IMPROVEMENTS IN
PROPELLERS," and have petitioned Her Majesty to grant unto us, our
executors, administrators, and assigns, Her Royal Letters Patent for the
same, and have made solemn Declaration that we are the first and true
Inventors thereof.
NOW KNOW YE, that we, the said Charles Kinzler and Adam Keppler,
do hereby declare that the following Complete Specification, under our

page_text: hands and seals, fully describes and ascertains the nature of the said
Invention, and in what manner the same is to be performed, in and by
the following statement :-
This Invention relates to an arrangement of a circular flanch on one
or both sides on the outer edge or edges of the blade or blades of pro-
pellers in such a manner as to prevent thereby the spreading of the
water side ways.
In order that our Invention may be fully understood we shall now.
proceed more particularly to describe the same, and for that purpose
shall refer to the several Figures on the Sheet of Drawings hereunto
annexed.
Figure I. represents a side elevation of a propeller embodying our
Invention; Figure II. shews a section of the same, and Figure III. an
end view. Figures IV. and V. represent end and side views of a
propeller with two blades with our improvement.
A (Figures I., II., and III.) represents a propeller consisting of a
single curved blade wound around its hub or axis. To the outer
circumference of this blade a flanch B is attached forming a regular
circle. This flanch may be made to project equally on both sides of
the screw or propeller blades or to project more on one side than on the
other side, or the same may be arranged to project only on one side of
the blade or blades. The centre line of the hub a is placed diagonally
to the center line or axis of the propeller blade to produce a certain
amount of throw independent to its regular action upon the water, but
tho circular flanch or ring B must be placed concentric with the center
of the hub a.
In Figures IV. and V. a two-bladed propeller is represented, where
cach blade A' has a ring or flanch B' attached at its outor edges forming
a part of a circle. In the same manner this
of a ring or part
of a ring or flanch to the outer circumference of the blades may be i
applied to propellers having three or more blades. By this arrangement
of a flanch on the outer edge of the propeller blade or blades the water
is partly confined, and thereby prevented from spreading or from being
thrown outwards, preventing thereby the washing away of the sides of
canals or disturbing the sand or dirt in the bottom of canals. When
this improvement is to be applied to propellers required to operate
forwards as well as backwards the flanch or ring on the outer edge of
the blades should project equally on both sides of the blade or blades,

page_text: but when the propeller is required to act only forwards as in the case of
canal boats, then this flanch or ring will only be required on the after
sides of the propeller blade or blades. The outer circumference of this
flanch or ring should be turned and the edges made sharp.
Having now described and particularly ascertained the nature of our
Invention, and the manner in which the same is or may be used or
carried into effect, we would observe in conclusion that what we consider
to be novel and original, and therefore claim as our Invention is, tho
arrangement of a flanch on one or both sides at the outer edge of the
blade or blades of a propeller forming a circular ring or part of a ring,
substantially as and for the purpose herein-before set forth.
In witness whereof, we, the said Charles Kinzler and Adam
Keppler, have hereunto set our hands and seals, this Fourth
day of January One thousand eight hundred and seventy.
CHARLES KINZLER. (L.S.)
ADAM KEPPLER.
(L.S.)