DISCLAIMER AND MEMORANDUM OF ALTERATION
Year: 1838

page_text: TAYLOR'S SPECIFICATION AND DISCLAIMER AND
MEMORANDUM OF ALTERATION.
TO. ALL TO WHOM THESE PRESENTS SHALL COME, I, JOSEPH
JEPSON ODDY TAYLOR, of, Gracechurch Street, in the City of London, Me-
chanist, send greeting. __
·
WHEREAS, Her: present most Excellent Majesty Queen Victoria, by
Her Royal Letters Patent under the Great Seal of Great Britain, bearing
date at Westminster, the First day of May, in the first year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Joseph Jepson Oddy Taylor, Her especial license; full power, sole
privilege and authority, that I, the said Joseph Jepson Oddy Taylor, my
executors, administrators, and assigns, and such others as I,. the said Joseph
Jepson Oddy Taylor, my executors, administrators, or assigns, should at any
time agree with, and no others, from time to time and at all times during the
term of years therein mentioned, should and lawfully might make, use, exer-
cise, and vend, within England, Wales, and the Town of Berwick-upon-Tweed,
and in all Her Majesty's Colonies and Plantations abroad, my Invention of
"AN IMPROVED MODE OF PROPELLING SHIPS AND OTHER VESSELS ON WATER;" in
which said Letters Patent is contained a proviso obliging me, the said Joseph
Jepson Oddy Taylor, by an instrument in writing under my hand and seal,
particularly to describe and ascertain the nature of my said Invention, and in
what manner the same is to be performed, and to cause the same to be
inrolled in. Her Majesty's High Court of Chancery within six calendar
months next and immediately after the date of the said in part recited Letters
Patent, as in and by the same; reference being thereunto had, will more
fully and at large appear.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
Joseph Jepson Oddy Taylor, do hereby declare that the nature of my said Inven-
tion, and the manner in which the same is to be performed, are particularly
described and ascertained in and by the following description thereof, reference
being had to the Drawings hereunto annexed, and to the letters and figures
marked thereon (that is to say):-
My invention of an improved mode of propelling ships and other vessels
on water consists in the use and application of two geometrically formed
blades or propellers placed or set at an angle on an axis or shaft, which axis
is to receive rotary motion, in the manner herein-after described, from a steam
engine or other motive power, and as the axis is turned either one way or the
other the vessel will be propelled ahead or astern. The axis or shaft coincides
with the line of the keel of the vessel, and passes through a stuffing box situated
in an opening or aperture made under the buttocks in the stern post, or at the
fore side of the stern post, in what is commonly called the "run" of the vessel
(or what is sometimes termed the "dead-wood" of the vessel), so as to obtain
security to the propelling blades in the event of the vessel grounding or having
to contend with heavy seas; and as the velocity or speed of the vessel by this
mode of propelling depends in a great measure upon the angle and form of
the blades, I have found by experiment that the angle of 22° to the axis of the
propelling shaft is the most efficient, and therefore the one which I recommend
to be adopted. The form of blade which I have found by experience and
repeated trials to be the best is that which in shape is like unto the blade of
an oar, but it must as a matter of course vary in length and width, according
to the size of the vessel to be propelled; and in order to shew more clearly the
form of blade I adopt, I refer to the geometrical diagram given in the accom-
panying Drawing, Fig. 1.
My improvements also apply to the shipping and unshipping of the blades
or propellers whilst the vessel is afloat, thereby obviating the necessity of going
into dock or upon "ways" to remove them from their place of action, or to
repair or clear the blades should they be fouled by sea weed, hawser, or other
obstructions, and which consists in a dovetailed or other shaped groove formed
longitudinally in each stern post on the sides of the opening in which the blades
or propellers revolve, and which, for durability and strength, should be formed
or made of metal, which grooves are to admit and allow the axis of the short
shaft to which the two blades or propellers are attached to be moved up and
down. At the bottom of the grooves are the bearings which support the short
shaft, and at the end of the short shaft nearest to the body or hull of the vessel
is formed a square or other shaped recess to receive a tongue or other coupling

page_text: formed at the end of the propelling shaft, which shaft passes through and works
in a proper and secure stuffing box; this shaft by being detached from the
engine, and pulled or moved inboard or pushed outwards to the extent of the
length of the tongue or coupling, may thereby be readily attached to or
detached from the propelling blades, the shaft being furnished with a stop to
prevent its being drawn further in than necessary, and forms a perfect coupling,
which may be used to connect or disconnect the shafts at pleasure. Within
the grooves are placed tongue pieces which are formed of metal or other mate-
rials, and made to slide up and down the grooves; these tongue pieces have
concavities at their end to fit on to the top of the short shaft of the propellers,
and at the lower part of each tongue piece is secured a hook, which will not
touch the short shaft when it is revolving on its bearings, which are fixed at
the bottom of the grooves, but only when the tongue pieces are drawn up the
grooves by means of the screw purchase, hereafter described, affixed to each
tongue, and which screws pass upward inboards. The effect of this arrange-
ment of mechanism is, that as soon as the main or inboard propelling shaft is
detached from the engine, and drawn upwards a distance equal to the length
of its tongue, the hooks will, as the tongues are screwed upwards, come in
contact with the under surface of the short shaft, and act as a sling or support,
and gradually raise it and the propelling blades attached thereto to the surface
of the water, and by an opening left in the upper part of the dovetailed grooves
above the load or water line of the vessel the short shaft and blades can be
taken out into a boat either on the larboard or starboard side; or if thought
desirable they may be removed by opening a hatchway formed over the short
shaft and blades, they being screwed up by the above-described arrangement
into the hold of the vessel, either to repair, unfoul, or be removed out of the
way, should it be desired to sail under canvass only.
Having now stated the nature and object of my Invention, I will proceed to
describe and ascertain more particularly the manner or method of carrying the
same into effect, reference being had to the accompanying Drawings, which will
serve to illustrate the arrangement of the parts, and a method of constructing and
adapting the blades or propellers to the purpose of propelling vessels, the same
letters of reference being marked upon corresponding parts in all the Figures.
Figure 1 is a geometrical diagram shewing the form of the blades or pro-
pellers; Fig. 2 is a side representation of the aft part or stern of a vessel, some
portions of which being removed in order to shew the improved mechanism;
and Fig. 3 is a sectional end view of the stern post, with the propellers
attached. a, a, is the main rotary or propelling shaft passing from the engine
or other first mover through the stuffing box b, b, placed securely in the stern

page_text: Post at c, and having proper glands or means of tightening up the packing as
required. Upon the outer end of the propelling shaft is formed the tongue-or
clutch piece d, (shewn by dots in Fig. 2,) which takes into a corresponding
clutch piece at one end of the short shaft e, upon which the propellers or
blades f,f, are mounted. The propellers are situated and revolve in an open
space g, g. 9, g, formed in the buttocks or "run" of the vessel, their axle, when in
the working position, turning in the half brasses or bearings at h, h, which rest
upon the ends of the grooves i, i, formed in the sides of the fore and aft stern
post k and . Within the grooves i, i, are placed the pieces m, m, attached by
proper couplings to the screws n, n, which turn in female screws o, o, fixed at
the upper end, and when the pieces m, m, are lowered down upon the ends of
the shaft they form the upper part of its plummer boxes or bearings, which
pieces are secured by their being pressed upon the shaft by the screws n, n.
When it is desired to unship the propellers or raise them out of the propelling.
position, the propelling shaft a is to be disconnected from the engine, and
drawn inwards a short distance, so as to withdraw the clutch piece or tongue
at d from out of the clutch of the shaft e; this shaft is then free to be raised up
by means of the screws n, n; the hooks or sling pieces before mentioned of the
pieces m, m, then take hold of and support the shaft as it is raised, the screws
n, n, being turned by winch handles, levers, toothed gear, or other convenient
means, and as soon as the propellers and shaft have been raised up a sufficient
height they may be removed from the vessel by lifting them out of the
pieces h, h, and carried away in a boat; this may be done either on the lar-
board or starboard side of the vessel. Or if thought more desirable, a hatchway,
as seen at p, may be made below the stern cabin, and they may be lifted or
screwed up through the opening directly into the vessel, and so unshipped. On
again applying the propellers it is only necessary to again place the shaft with
the propellers into the hooks or slings of the pieces m, m, and lower them by
means of the screws n, n, into their proper propelling position; when this is
done, the propelling shaft a is to be moved outward, so that its clutch at d shall
take into gear with the shaft e; and then by attaching the shaft a to the rotary
mover of the engine the propellers will be set in motion as before stated, the
pieces m, m, pressing slightly upon the upper side of the shaft e to keep it in
its proper position.
.
Having now described the nature of my Invention, and the manner of
carrying the same into effect, I shall refer to the geometrical diagram, Fig. 1,
of the accompanying Drawings, which shews the form of my improved blades
or propellers, and the proportions which. I prefer. Let A, B, be the required
léngth or radius of the blade, C, D, its breadth equal to about half its length,

page_text: with the central part reduced in width to a quarter of that of C, D, or half if
greater strength be needful; these blades are placed securely upon the shaft e
at about the angle of 22° to its axis, and are formed as a portion of a circle on
the outer edge, bevilled off at all the sides.
In witness whereof, I, the said Joseph Jepson Oddy Taylor, have here-
unto set my hand and seal, this First day of November, One thou-
sand eight hundred and thirty-eight.
J. J. O. (L.S.)
TAYLOR.
AND BE IT REMEMBERED, that on the First day of November, in the
second year of the reign of Her Majesty Queen Victoria, the said Joseph
Jepson Oddy Taylor came before our said Lady the Queen in Her Chan-
cery, and acknowledged the Instrument aforesaid, and all and every thing
therein contained and specified, in form above written. And also the Instru-
ment aforesaid was stamped according to the tenor of the Statute made in
the fifty-fifth year of the reign of His late Majesty King George the Third.
Inrolled the First day of November, One thousand eight hundred and
thirty-eight.

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOSEPII
JEPSON ODDY TAYLOR, of Gracechurch Street, in the City of London, Machinist,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent under the Great Seal of Great Britain, bearing date at Westminster,
the First day of May, in the first year of Her reign, did, for Herself, Her
heirs and successors, give and grant unto me, the said Joseph Jepson Oddy
Taylor, my exors, adiñors, and assigns, Her especial licence and full power,
sole privilege and authority, that I, the said Joseph Jepson Oddy Taylor, my
exors, adiñors, and assigns, and every of them, by myself and themselves, or
by my and their deputy or deputies, servants, or agents, or such others as I,
the said Joseph Jepson Oddy Taylor, my exors, adñññors, and assigns, should at
any time agree with, and no others, from time to time and at all times there-
after during the term of years therein expressed, should and lawfully might
make, use, and exercise, and vend my said therein-mentioned Invention of
"AN IMPROVED MODE OF PROPELLING SHIPS AND OTHER VESSELS ON WATER"
within that part of the United Kingdom of Great Britain and Ireland called
England, the Dominion of Wales, and the Town of Berwick-upon-Tweed,
and also in all the Colonics and Plantations abroad, in such manner as to me,
the said Joseph Jepson Oddy Taylor, my exors, adñiors, and assigns, or any of
them, should, in their or my discretion, seem meet: And whereas I, the said
Joseph Jepson Oddy Taylor, in pursuance of a proviso in the said in part
recited Letters Patent contained, did cause a particular description of the
nature of my said Invention, and in what manner the same is to be performed,
by an instrument in writing under my hand and seal, to be enrolled in Her
said Majesty's High Court of Chancery on the First day of November, in the
year of our Lord One thousand eight hundred and thirty-eight: And whereas
I, the said Joseph Jepson Oddy Taylor, am desirous, for good and sufficient
reasons herein-after mentioned, to enter a Disclaimer of that part of the Speci-
fication of my said Invention herein-after next mentioned, and also to enter a
Memorandum of Alteration in the Title of my said Invention herein-after next
mentioned, and have obtained the leave of Her Majesty's Attorney General,

page_text: certified by his fiat and signature according to the form of the Statute in such
case made and provided:
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KNOW YE, therefore, that I, the said Joseph Jepson Oddy Taylor, do
hereby disclaim the following part of the said Specification; that is to say:-
I disclaim the words, "My Invention of an improved mode of propelling
ships and other vessels on water consists in the use and application of two
geometrically formed blades or propellers placed or set at an angle on an
"axis or shaft, which axis is to receive rotary motion, in the manner herein-
"after described, from a steam engine or other motive power, and as the axis
"is turned either one way or the other the vessel will be propelled ahead or
"astern.
The axis or shaft coincides with the line of the keel of the vessel,
"and passes through a stuffing box situate in an opening or aperture made
"under the buttocks in the stern post, or at the fore side of the stern post, in
"what is commonly called the run of the vessel (or what is sometimes termed
"the 'dead-wood' of the vessel), so as to obtain security to the propelling
"blades in the event of the vessel grounding or having to contend with heavy
seas; and as the velocity or speed of the vessel by this mode of propelling
depends in a great measure upon the angle and form of the blades, I have
"found by experiment that the angle of twenty-two degrees to the axis of the
propelling shaft is the most efficient, and therefore the one which I recom-
"mend to be adopted. The form of blade which I have found by experience
"and repeated trials to be the best, is that which in shape is like unto the
"blade of an oar; but it must, as a matter of course, vary in length, accord-
ing to the size of the vessel to be propelled; and in order to shew more
clearly the form of blade I adopt, I refer to the geometrical Diagram given
"in the accompanying Drawing, Fig. 1:"
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And I do hereby also disclaim all such further parts of the said Specifica-
tion as have reference to or were inserted therein by reason of the prior
insertion therein of the part thereof first herein-before disclaimed:
And also that I, the said Joseph Jepson Oddy Taylor, do hereby enter the
following Memorandum of Alteration in the Title of the said Invention; that
is to say, I alter the said title of "My Invention of an improved Mode of
"Propelling Ships and other Vessels on Water," to, and now call and describe
the same as, "My Invention of an improved Mode of constructing Ships and
"other Vessels with a view to their adopting the Use of Propelling Blades,
"and the Shipping and Unshipping of such Blades :"
And I, the said Joseph Jepson Oddy Taylor, do also hereby declare, that
my reasons for making and entering the above Disclaimer and Memorandum
of Alteration are as follows; that is to say, that when I, the said Joseph Jepson

page_text: Oddy Taylor, recently applied to the Judicial Committee of Her Majesty's
Most Honorable Privy Council for an extension of the Patent for the whole
of my said Invention, it was then intimated to me, the said Joseph Jepson
Oddy Taylor, by the said Judicial Committee, that there was a want of novelty
in such parts of my Specification as I have above disclaimed; but that a case
for extending the period of my said Invention would have been made out if
I, the said Joseph Jepson Oddy, Taylor, had confined my said Patent to that
part of my said Invention. not herein-before disclaimed or otherwise altered.
As to such part, therefore, for the purpose, and with the view, of obtaining
from the said Judicial Committee an extension of the latter Patent, so far as
regards such part of my said Invention as I have not hereby disclaimed, I, the
said Joseph Jepson Oddy Taylor, have hereby made and entered the Disclaimer
and Alteration herein-before mentioned and referred to. And I, the said
Joseph Jepson Oddy Taylor, do hereby further declare, that the above Dis-
claimer and Memorandum of Alteration is. not such a Disclaimer or Alter-
ation as will extend the exclusive right granted by the said Letters Patent. .
In witness whereof, I have hereunto set my hand, this Sixth day of April,
One thousand eight hundred and fifty-two.

page_text: AND BE IT REMEMBERED, that on the Sixth day of April, in the year
of our Lord 1852, the aforesaid Joseph Jepson Oddy Taylor came before our
said Lady the Queen in Her Chancery, and acknowledged the Disclaimer
aforesaid, and all and everything therein contained and specified, in form above
written. And also the Disclaimer aforesaid was stamped according to the
tenor of the Statute made for that purpose.
Enrolled the Fourteenth day of April, in the year of our
thousand eight hundred and fifty-two.
Lord One