Improvement in Vibrating Propellers. Page: 2 of 2
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UNITED STATES PATENT OFFICE.
CHARLES P. 1MACOWITZKY, OF CORPUS CHRISTI, TEXAS.
IMPROVEMENT IN VIBRATING PROPELLERS.
Specification forming part of Letters Patent No. 15S,101, dated December 22, 1874; application filed
May 1l6, 11874.
To all wzcom it may concern:
Be it known that I, CHARLES P. MACOW-
ITZKY, of Corpus Christi, in the county of
Nueces and State of Texas, have invented a
new and useful Improvement in Vibrating
Propellers, of which the following is a speci-
Figure 1 is a cross-section of my improved
device. Fig. 2 is a detail longitudinal sec-
tion. Fig. 3 is a detail view of the sliding
plate and shifting device.
Similar letters of reference indicate corre-
The invention is an improvement on the
propellers for which I obtained Letters Pat-
ents Nos. 135,994 and 146,009; and it relates
to the arrangement of the sliding-frame, to
which the paddles are pivoted with relation
to the side or shell of the boat or other ves-
sel, and to the rack-bar by which the paddles
are vibrated, as hereinafter described.
A represents the rack-bar connected with
the motive power, and is geared with a strong
pinion-.wheel, B, which is thereby turned in
both directions. Its shaft extends and is se-
cured to a larger gear-wheel, C, which wheel
is incased and passes through the skin or side
of the vessel, and is geared with adjustable
rack-bar I). The teeth of said rack-bar may
pass entirely through to the outside thereof,
and engage with the teeth of small gear-
wheels or segments P attached to or formed
upon the base of the paddles F, or may have
teeth upon both sides. The said paddles are
scurely pivoted to the outside of the sliding
frame G, which is pierced at places to admit
the teeth of the small gear-wheels or segments
to work and mesh into the teeth of the rack-
bar D. This arrangement of the rack-bar D
prevents its entanglement with ropes, or con-
tact with floating or stationary objects, where-
by injury would result, or its operation be im-
peded. The reciprocating movement of the
rack-bar D upon the sliding frame G is limited
by adjustable stops connected with the arm E,
which arm is firmly connected with the rack-
bar D, has a threaded hole formed through it,
through which a correspondingly-threaded
sleeve or socket, H, is screwed, and which has
flanges, nuts, or other stops on its ends. The
length of said sleeve is regulated according
to the diameter of the small gear-wheels or
segments P. I is a square or feathered rod,
which has a screw or pinion wheel formed at
its center, and may be swiveled at the ends
and center. The rod I passes through a
square hole formed longitudinally in the sleeve
H. The arm E and socket or sleeve H enter
a slot, K, in the sliding frame. This slot may
have elastic stops on each end. The slot is
longer than the sleeve H to allow the paddles
to open or close at the proper time of the stroke
without loss or resistance. The rack-bar and
sliding framemay be guided by rails or grooves
provided with friction-rollers or wheels, in
order to insure the proper connection of all
the gearing. The paddles are reversed by
turning the sleeve H by means of the rod 1.
This will change the relative position of the
arn E with the sliding frame G, and force the
paddle; F to operate as desired. By revers-
ing the paddles upon one side, the vessel may
be turned in a very small space-almost upon
her axis. The rod I may be turned by suit-
able gearing from the pilot-house. A vessel
with this system of propulsion will be enabled
to avail herself of winds, and go under sail
entirely, if so desired, as my device does not
interfere withthe vessel's sailing. The doublc-
elbow rack-bars upon each side of the vessel
may be connected uy a cross-bar, so as to be
operated by a single engine, or each rack-bar
may be operated by an independent engine,
as may be desired.
Having thus described my invention, I claim
as new and desire to secure by Letters Pat-
The combination of the sliding slotted frame
G, carrying the hinged paddles F with toothed
segments P, and arranged flush with, or ex-
terior to, the side of the vessel, and the slid-
ing rack D, arranged behind and contiguous
to said frame, all as shown and described.
CHARLES P. MACOWITZKY.
JAMES T. GRAHAM,
T. B. MosHER
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Macowitzky, Charles P. Improvement in Vibrating Propellers., patent, December 22, 1874; [Washington D.C.]. (texashistory.unt.edu/ark:/67531/metapth167026/m1/2/: accessed October 22, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; crediting UNT Libraries Government Documents Department.