Improvements in Submerged Feathering Propellers for Marine Purposes.
Year: 1899

page_text: Date of Application, 22nd Mar., 1899-Accepted, 20th May, 1899
COMPLETE SPECIFICATION.
Improvements in Submerged Feathering Propellers for Marine
Purposes.
We, EDWARD FRANCIS GORMAN and PENFIELD FLETCHER YOST, both of 2114,
Stella Street, Philadelphia, County of Philadelphia, and State of Pennsylvania,
United States of America, Gentlemen, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement, reference being had to the
accompanying drawing, and to letters of reference marked thereon, which form
a part of this specification:-
This invention relates to a new and useful improvement in Submerged
Feathering Propellers for Marine Purposes, and has for its object to provide a
simple and effective propeller of this description, the blades of which will exert
the maximum force against the water in the proper direction and then be turned
edgewise through one portion of their movement which would retard the vessel;
a further object of our invention is to overcome the side thrust incident to the
churning or racing," thereby
screw propeller and avoid the possibility of
permitting the application of a greater amount of power to a propeller of given
size.
**
22
With these ends in view, this invention consists in the details of construction
and combination of elements hereinafter set forth and then specifically designated
by the claims.
In order that those skilled in the art to which this invention appertains may
understand how to make and use the same, the construction and operation will
now be described in detail, referring to the accompanying drawing forming a
part of this specification, in which-
Fig. 1, is a section of the hub showing the blade-spindles and the spherica!
cam for operating the same;
Fig. 2, a longitudinal section of the power shaft and hub also showing the
spherical cam and the grooves therein for operating the blade-spindles;
Fig. 3, a diagrammatical view of the cam grooves,
Fig. 4, a detail perspective of one of the blade-spindles, and
Fig. 5, is a side view of the stern of the vessel showing our propeller applied
thereto.
In carrying out our invention as here embodied, represents a hub formed
or secured upon the hollow shaft B; and this hub and shaft are made in two
sections secured together in any convenient manner. A spindle C is fitted
within the hub and shaft so as to remain stationary while the shaft and hub
revolve, and has secured thereon a spherical cam D. This cam D has two
grooves E and E¹ formed therein, and these grooves are deflected as indicated
at F and F¹, as clearly shown in Figure 3.

page_text: Spindles G, here shown as four in number, are fitted within the hub so as to
oscillate therein, each having two pins H and H projecting therefrom into the
grooves E and E¹ respectively; the result of this is that when the hub is revolved,
carrying the blade-spindles G, the pins of said spindles travelling in the straight
portions of the grooves E and Ewill hold the spindles, and consequently the
blades, in the position which corresponds to the particular portion of the grooves
in which the pins are then travelling, but when the pins are brought into engage-
ment with the deflected portions and F of the grooves the spindles G will
then be caused to oscillate through ninety degrees, carrying with them their
blades for the purpose hereinafter set forth.
The formation of the deflections in the grooves E and E¹ is such that the
deflection F coming in contact with the pin H will act to turn its spindle while
the pin H will revolve without being acted upon by the deflection F which is
enlarged so as to not act upon this last named pin, but when in the travel of
the pins they reach the second set of deflections F2 and F3, the deflection F
acts upon the pin H to again turn the spindle to the first position, during
which movement the pin H will move in the deflection F3 without effect.
From this description it will be seen that the revolving of the hollow propeller-
shaft B will cause the propeller-blades I carried by the spindles G not only to
revolve with the hub, but also to alternately turn to bring their surfaces against
the water, and to again turn edgewise thereto, and this turning movement should
be so time by the proper location of the spherical cam D as to first cause the
propeller-blades to fully act upon the water to force the vessel forward and then
edgewise to feather during the remainder of their movement until reaching the
proper point, when they will again be turned and take a full hold upon the water,
as will be readily understood. The reversing of the movement of the propeller
shaft will produce a reverse of the propeller-blades thereby driving the vessel
backward.
It is to be noted that the blade-spindles G are concaved upon their inner ends,
as indicated at J, so as to be adapted to the contour of this spherical cam, and
thereby always remains in close proximity thereto.
The propeller, as shown in Figure 5, may be secured to the keel part of the
vessel, one being located upon each side thereof, or if desired, the propeller
shaft may stand horizontally, and any number thereof may be located along
the sides of the vessel, the blades working at right angles thereto.
We do not wish to be limited to any particular manner of journaling the
propeller-shaft or the securement of the cam spindle passing therethrough, as
these may be accomplished in any suitable manner.
A propeller constructed in accordance with our improvement when submerged
will have but little or no side thrust, and will at all times tend to force the vessel
in the proper direction with the least consumption of power for the speed obtained.
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. A propeller consisting of a suitable hub, spindles journaled therein, blades
carried by said spindles, a cam fitted within the hub, means for holding said
cam stationary during the revolving of the hub, and pins projecting from the
blade-spindles into the grooves of said cam, as specified.
2. In combination, a suitable hub, a spherical cam fitted therein, means for
holding said cam stationary while the hub revolves, spindles G fitted to oscillate
within the hub, two pins projecting from each of the last named spindles into
the grooves of the cam, and blades carried by the said spindles, as shown and
described.
3. In combination, a rotary hollow hub, a spherical cam fitted therein, means
for holding said cam stationary during the revolving of the hub, said cam having
two grooves formed therein with deflections, oscillating spindles fitted within

page_text: the hub having their inner ends concaved, two pins projecting from each of
these spindles into the grooves of the cam, and blades carried by these spindles,
as specified.
Dated
this 22nd day of March 1899.
J. P. BAYLY,
18, Fulham Place, London, W., Agent for Applicants.