Improvements in Screw Propellers for Working in Air.
Year: 1896

page_text: Date of Application, 9th Apr., 1896
PROVISIONAL SPECIFICATION.
Improvements in Screw Propellers for Working in Air.
We, EDWARD JOEL PENNINGTON, of the City of Racine, in the County of Racine
and State of Wisconsin, United States of America, Gentleman, and ANTHONY GEORGE
NEW, of Palace Chambers, Bridge Street, Westminster, Electrical Engineer, do
hereby declare the nature of this invention to be as follows:-
This invention relates to propellers for aeronautical vessels and has for its object a
propeller that shall be strong and durable and of simple construction and that shall
serve the purposes of a fly wheel as well as those of a propeller.
Our improved propeller is constructed with a suitable metal frame having a
considerable proportion of its weight disposed at the periphery so as to be very
effective as a fly wheel. For this purpose we construct the frame from a curved bar
or bars of steel or other suitable metal at the extreme tip of each blade which bar or
bars is or are joined to the hub by one or more radial bars. The edges of the frame
may be formed by strips of wood or other light and rigid material.
The frame so made is covered with cloth or other suitable covering material.
Dated this 9th day of April 1896.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicants.
improvements in Screw Propellers for Working in Air.
We, EDWARD JOEL PENNINGTON, of the City of Racine, in the County of Racine,
and State of Wisconsin, United States of America, Gentleman, and ANTHONY GEORGE
NEW, of Palace Chambers, Bridge Street, Westminster, Electrical Engineer, 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:-
This invention relates to screw propellers for aeronautical vessels, motor driven
bicycles and other machines driven by means of a screw propeller working in the
atmosphere, and the said invention has for its object a screw propeller that will be
strong and durable and of simple construction and that will serve the purposes of a fly
wheel as well as those of a propeller.
Our improved propeller is constructed with a suitable metal frame having a
considerable proportion of its weight disposed at the periphery thereof so as to be
very effective as a fly wheel. For this purpose we construct the frame from a curved
bar or bars of steel or other suitable metal at the extreme tip of each blade which bar
or bars is or are united to the hub by one or more radial bars. The remainder of the
blades may be formed of wood or other light and rigid material.

page_text: Referring to the accompanying drawings,
Figure 1 is a front elevation of the frame of a two bladed screw propeller constructed
according to our invention, and
Figure 2 is a side elevation of the propeller and a motor for driving it.
A is the hub of the propeller. B, B are curved bars of steel or other strong and
heavy metal forming the tip ends of the blades. The said bars are united to the bub
by radial bars C, Cof which there may be one or more than one in each blade. The
remaining portions of the blades are formed of wood or other light and rigid material,
or the edges only of the blades may be so formed. The blades are then covered with
cloth or other suitable covering material. In this manner a light but strong propeller
is provided having a considerable proportion of its weight concentrated at the tip ends
of the blades, and consequently the said propeller will serve efficiently as a flywheel
and thus avoid the necessity of employing a separate fly wheel.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is
1. The construction of a screw propeller with metal bars at the tip ends of the
blades united to the hub by a radial bar or bars, substantially as, and for the purposes,
specified.
2. A screw propeller constructed substantially as described with reference to the
accompanying drawings for the purposes specified.
Dated this 11th day of January 1897.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, W.C., Agents for the Applicants.