A New or Improved Oar.
Year: 1894

page_text: Date of Application, 16th Mar., 1894-Accepted, 14th July, 1894
COMPLETE SPECIFICATION.
A New or Improved Oar.
I, JOSEF PETIOKÝ, of Königsaal, near Prague, Bohemia, Law Student, do
hereby declare the nature of this invention and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement, that is to say :-
The object of this invention is to produce an oar by which an oarsman can propel
a boat while seated with his face turned in the direction of motion of the boat.
In the accompanying drawing Figure 1 is a perspective view of an oar constructed
and applied in accordance with the invention, and Figures 2 and 3 are detail views
of certain parts to a larger scale.
The inner part or lever a of the oar swings or vibrates on a thole pin b, and
terminates in a ring c which takes into an eye of the outer part or lever d of the
oar, forming therewith a kind of hinge joint. Outside the boat is fixed an
upwardly bent outrigger e on which is set the rowlock plate f (shown in dotted lines
in Figure 1 of the drawing but more clearly in full lines in Figure 2) which
supports the lever d through which the outrigger e passes. Over this rowlock
plate and on the outrigger e is placed a toothed pinion g which may be rotated by
a crank handle or otherwise, and which gears into the segmental rack fixed on
the lever d. By these means the position of the outer lever d can be adjusted
with reference to the water line. On the part d is a blade i to which is hinged a
board or plate k which opens into the position shewn in dotted lines in Figure 3, as
the blade i moves forward in the direction of the arrow and closes by the pressure
of the water into the position shewn in full lines in that figure as the blade i moves
backward.
It will be readily understood that each movement of the inner part or lever a
produces a swinging or vibrating movement of the outer parts di and k whereby
when the oarsman sits with his face in the direction of motion of the boat, and pulls
the inner lever a towards himself, the parts i k are pressed backwards, the part k
closing up as shown in the drawing so as to press against the water and propel the
boat, whereas when he pushes the inuer lever away from himself the parts i kare
pressed forward and the part k opens as shewn in Figure 3 so as to offer little
resistance to the passage of those parts through the water in that direction.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what 1
claim is :-
First. The new or improved oar consisting of an inner part or lever turning on a
thole pin, and an outer part or lever jointed to the inner part or lever and
turning on an outrigger, substantially as described with reference to the accompany-
ing drawing.
Second. In an oar of the kind forming the subject of the first claiming clause
hereof the means for regulating the position of the outer part or lever with reference
to the water line which consists of a toothed pinion mounted on the outrigger and
a toothed segmental rack on the said outer part or lever, substantially as described
with reference to the accompanying drawing.
Third. In an oar of the kind forming the subject of the first claiming clause
hereof, the employment of a board or plate hinged to the outer part of such oar and
רנרס

page_text: opening and closing according to the direction of motion of such part, substantially
as described with reference to the accompanying drawing.
Dated this 16th day of March 1894
J. PETIOKY.
Per W. H. Beck,
115, Cannon Street, London, Agent.