Year: 1888

page_text: I, JOSEPH BUTTERISS, of No. 2 Heald Street, Tanner's Hill Deptford, London, S.E.
Engineer do hereby declare the nature of this invention to be as follows:-
The object of my Invention is to provide a substitute for the screw propeller as
hitherto constructed, and employed for the propulsion of vessels, and the adoption
of the device or contrivance according to my Invention is intended to effect
a great saving of time and fuel, relatively to other known methods of marine propulsion
in general use.
In carrying my invention into effect, I provide two parallel shafts, supported by
suitable brackets, one on each side of the keel of the vessel, each shaft carrying a
pinion at the aftermost extremity. A spur wheel, driven by the engines within the
vessel, is so arranged as to gear with both pinions, and communicate the motion and
power of said engines thereto. The shafts before referred to extend to nearly the
whole length of the keel, and are provided with a spiral web, or Archimedian screw,
consisting of one or more threads, the outer edge of which is shrouded for the purpose
of obtaining a "grip" upon the water, and minimising the "slip" when the vessel
is in motion. The screw threads, above referred to, may be interrupted at intervals
along the length of the parallel shafts, for the purpose of placing the supporting
bearing brackets wherever the strains imposed upon, and weight of said shafts, render
such support necessary.
or
The engines may be reversed in the usual manner, and the vessel moved "ahead"
"astern as may be desired.
»
The propellers, according to my Invention may be readily applied to any type of
steam ship or vessel at present in use, by the addition thereto of a false keel,
attached to, and under, the main keel of said vessel; said false keel carrying
the shafts and propellers herein before described, and adding considerably to the
stability of the vessel.
Deted this 1st day of November 1888
FREDK. WALKER & HYDE,
4, Little Moorfields, London, E.C.,
Agents for Applicant.

page_text: I JOSEPH BUTTERISS, of No. 2 Heald Street, Tanner's Hill Deptford, London, S.E.
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:-
The object of my Invention is to provide a substitute for the screw propeller as
bitherto constructed and employed for the propulsion of vessels, and the adoption
of the device or contrivance according to my Invention is intended to effect a great
saving of time and fuel relatively to other known methods of marine propulsion in
general use.
In order that my Invention may be clearly understood, I have appended the
accompanying sheet of drawings, in which Figure 1 represents an elevation of a
steam ship fitted with propellers according to my Invention, and Figure 2 is a reverse
plan of the same, Figure 3 being an end view of the stern thereof, Figure 4 is a
view, upon an enlarged scale, of a portion of one of the propellers with shaft, shewn
detached, and broken off. Like letters of reference indicate corresponding parts
throughout the several views.
In carrying my Invention into effect, I provide two parallel shafts, AA' Figures 1, 2,
and 3, supported by suitable bracket bearings, B, B, B, B, B B B B fixed upon both
sides of the keel of the vessel. Each shaft A A' carries a pinion C, at the aftermost
extremity, keyed or otherwise attached firmly to said shafts. A spur wheel D, driven
by the engines or other motive power within the vessel is so arranged as to gear with
both pinions C, C, and thus communicate motion and power to the parallel shafts A A¹
hereinbefore referred to. These shafts extend to nearly the whole length of the keel,
and are provided with a spiral web, or Archimedian screw, consisting of one or more
separate helices, the outer edge of which is or are shrouded in the manner shown
by a a', Figure 4, for the purpose of obtaining a "grip" upon the water, and thus
minimising the "slip" when the vessel is in motion. The screw threads above referred
to, may be interrupted at certain intervals along the parallel shafts for the purpose
of placing and fixing the supporting bearing brackets wherever the strains imposed
upon, and weight of, said shafts render such support necessary. I may form the arms
or spokes of the spur wheel D in such a manner as to act as portion of a screw thread,
properly proportioning the pitch, area, and angles of the same so that the speed ratio
corresponds with the parallel shafts A A¹, and helices carried by or formed thereon.
I may also employ tubular shafts A A¹, suitably coupled by screw or other couplings
in lengths, so that each length may be provided with a portion or part of the spiral
web, screw or helice forming the propeller, and a bearing or journal, with or without
collars or faces for sustaining a portion of the thrust. I prefer in practice, to provide
a stay or stays, E E', attached to the foremost bearing bracket, and being also fixed
to the keel; in such a position as to transmit the main thrust of the shaft thereto. I
may employ epicycloidal, helical or other gearing for the spur wheel D and pinions C,C,

page_text: "
and may vary the type and form of the arms or spokes of the wheel D, and the spiral
webs, screws or helices upon the shafts A A', and the shrouding or water grip" as
may be necessary to meet the requirements of particular cases in which the device or
contrivance according to my Invention may be adopted for marine propulsion.
In order to procure the reversal of the direction of motion of the vessel, the
engines, motor or motors giving motion to the spur wheel D may be reversed in the
usual manner.
The propellers, according to my Invention may be readily applied to any type of
steam or motor driven ship or vessel at present in use, by the addition thereto of a
false keel, attached to, and under the main keel of said vessel, said false keel carrying
the shafts and propellers hereinbefore described, and thereby adding considerably to
the stability of the vessel.
The principal advantages of these propellers consist in that in a heavy sea way, in
which the vessel may pitch and roll heavily, the greater portion of the surface area
of the propellers is always immersed, thus preventing "racing" of the engines or
other motor, also in that the "water grip" is greater than obtains with the screw
propeller as hitherto employed, owing to the shrouding a a' Figure 4, which
forins a part of my Invention, and the loss due to excessive "slip" is thereby
minimised.
The surface area being greater than that of an ordinary screw propeller, as above
referred to, and the power and thrust being applied to, and distributed throughout the
length of the keel of the vessel, the duty of the engines or motor relatively. to speed
in knots per hour is considerably increased.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I wish it to bo understood that
I do not generally claim the flanging of the edges of the blades of screw propellers,
but I declare that what I claim is,-
First. In a propeller for marine propulsion the employment of parallel shafts with
one or more helices or threads formed upon or attached thereto, arranged in bearings
alongside the keel or false keel of a vessel and driven by gearing, substantially as
herein described and shewn in the accompannying sheet of drawings.
Second. In a propeller for marine propulsion the shrouding of the outer edge or
edges of the helix or helices constituting said propeller, as shewn by a a' Figuro 4,
substantially as and for the purposes hercin described and set forth.
Third. In a propeller for marine propulsion, the employment of geared wheels for
transmitting motion thereto from the engines or other motor within tho vessel, and
the angular or helical disposition and formation of the arms or spokes thereof, substan-
tially as and for the purposes herein described and set forth.
Dated thin 17th day of December 1000
FREDK. WALKER & HYDE,
4, Little Moorfields, London, E.C.,
Agents for the Applicant.

page_text: Date of Application, 1st Nov., 1888
Complete Specification Left, 19th Dec., 1888-Accepted, 29th Jan., 1889
I, JOSEPH BUTTERISS, of No. 2 Heald Street, Tanner's Hill Deptford, London, S.E.
Engineer do hereby declare the nature of this invention to be as follows:-
The object of my Invention is to provide a substitute for the screw propeller as
hitherto constructed, and employed for the propulsion of vessels, and the adoption
of the device or contrivance according to my Invention is intended to effect
a great saving of time and fuel, relatively to other known methods of marine propulsion
in general use.
In carrying my invention into effect, I provide two parallel shafts, supported by
suitable brackets, one on each side of the keel of the vessel, each shaft carrying a
pinion at the aftermost extremity. A spur wheel, driven by the engines within the
vessel, is so arranged as to gear with both pinions, and communicate the motion and
power of said engines thereto. The shafts before referred to extend to nearly the
whole length of the keel, and are provided with a spiral web, or Archimedian screw,
consisting of one or more threads, the outer edge of which is shrouded for the purpose
of obtaining a
grip" upon the water, and minimising the "slip" when the vessel
is in motion. The screw threads, above referred to, may be interrupted at intervals
along the length of the parallel shafts, for the purpose of placing the supporting
bearing brackets wherever the strains imposed upon, and weight of said shafts, render
such support necessary.
or
The engines may be reversed in the usual manner, and the vessel moved "ahead"
astern as may be desired.
แ
"
The propellers, according to my Invention may be readily applied to any type of
steam ship or vessel at present in use, by the addition thereto of a false keel,
attached to, and under, the main keel of said vessel, said false keel carrying
the shafts and propellers hereinbefore described, and adding considerably to the
stability of the vessel.
Dated this 1st day of November 1888.
FREDK. WALKER & HYDE,
4, Little Moorfields, London, E.C.,
Agents for Applicant.

page_text: I JOSEPH BUTTERISS, of No. 2 Heald Street, Tanner's Hill Deptford, London, S.E.
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:
The object of my Invention is to provide a substitute for the scrow propeller as
hitherto constructed and employed for the propulsion of vessels, and the adoption
of the device or contrivance according to my Invention is intended to effect a great
saving of time and fuel relatively to other known methods of marine propulsion in
general use.
In order that my Invention may be clearly understood, I have appended the
accompanying sheet of drawings, in which Figure represents an elevation of a
steam ship fitted with propellers according to my Invention, and Figure 2 is a reverso
plan of the same, Figure 3 being an end view of the stern thereof, Figure 4 is a
view, upon an enlarged scale, of a portion of one of the propellers with shaft, shewn
detached, and broken off. Like letters of referenco indicate corresponding, parts
throughout the several views.
In carrying my Invention into effect, I provide two parallel shafts, AA" Figures 1, 2,
and 3, supported by suitable bracket bearings, B, B, B, B, B¹ B¹ B¹ B¹ fixed upon both
sides of the keel of the vessel. Each shaft A A' carries a pinion C, C at the aftermost
extremity, keyed or otherwise attached firmly to said shafts. A spur wheel D, driven
by the engines or other motive power within the vessel is so arranged as to gear with
both pinions (, C, and thus communicate motion and power to the parallel shafts AA'
hereinbefore referred to. These shafts extend to nearly the whole length of the keel,
and are provided with a spiral web, or Archimedian screw, consisting of one or more
separate helices, the outer edge of which is or are shrouded in the manner shown
by aa, Figure 4, for the purpose of obtaining a "grip" upon the water, and thus
minimising the "slip" when the vessel is in motion. The screw threads above referred
to, may be interrupted at certain intervals along the parallel shafts for the purpose
of placing and fixing the supporting bearing brackets wherever the strains imposed
upon, and weight of, said shafts render such support necessary. I may form the arms
or spokes of the spur wheel D in such a manner as to act as portion of a screw thread,
properly proportioning the pitch, area, and angles of the same so that the speed ratio
corresponds with the parallel shafts A A', and helices carried by or formed thereon.
I may also employ tubular shafts A A', suitably coupled by screw or other couplings
in lengths, so that each length may be provided with a portion or part of the spiral
web, screw or helice forming the propeller, and a bearing or journal, with or without
collars or faces for sustaining a portion of the thrust. I prefer in practice, to provide
a stay or stays, E E, attached to the foremost bearing bracket, and being also fixed
to the keel, in such a position as to transmit the main thrust of the shaft thereto. I
may employ epicycloidal, helical or other gearing for the spur wheel D and pinious C,C",

page_text: "
and may vary the type and form of the arms or spokes of the wheel D, and the spiral.
webs, screws or helices upon the shafts A A¹, and the shrouding or water grip" as
may be necessary to meet the requirements of particular cases in which the device or
contrivance according to my Invention may be adopted for marine propulsion.
In order to procure the reversal of the direction of motion of the vessel, the
engines, motor or motors giving motion to the spur wheel D may be reversed in the
usual manner.
The propellers, according to my Invention may be readily applied to any type of
steam or motor driven ship or vessel at present in use, by the addition thereto of a
false keel, attached to, and under the main keel of said vessel, said false keel carrying
the shafts and propellers herein before described, and thereby adding considerably to
the stability of the vessel.
The principal advantages of these propellers consist in that in a heavy sea way, in
which the vessel may pitch and roll heavily, the greater portion of the surface area
of the propellers is always immersed, thus preventing "racing" of the engines or..
other motor, also in that the "water grip" is greater than obtains with the screw
propeller as hitherto employed, owing to the shrouding a a' Figure 4, which
forms a part of my Invention, and the loss due to excessive "slip" is thoreby
minimised.
The surface area being greater than that of an ordinary screw propeller, as above
referred to, and the power and thrust being applied to, and distributed throughout the
length of the keel of the vessel, the duty of the engines or motor relatively to speed
in knots per hour is considerably increased.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I wish it to be understood that
I do not generally claim the flanging of the edges of the blades of screw propellers,
but I declare that what I claim is,
First. In a propeller for marine propulsion the employment of parallel shafts with
one or more helices or threads formed upon or attached thereto, arranged in bearings
alongside the keel or false keel of a vessel and driven by gearing, substantially as
herein described and shown in the accompannying sheet of drawings.
Second. In a propeller for marine propulsion the shrouding of the outer edgo or
dges of the helix or helices constituting said propeller, as shown by a a¹ Figure 4,
substantially as and for the purposes herein described and set forth.
edg
Third. In a propeller for marine propulsion, the employment of geared wheels for
transmitting motion thereto from the engines or other motor within the vessel, and
the angular or helical disposition and formation of the arms or spokes thereof, substan-
tially as and for the purposes herein described and set forth.
Dated this 17th day of December 1888.
FREDK. WALKER & HYDE,
4, Little Moorfields, London, E.C.,
Agents for the Applicant.