Improvements in Apparatus for Maintaining a Constant Level on Ships at Sea and the like, and to Prevent Jars to Cycle Saddles and to Carriage Bodies and the like on Land.
Year: 1899

page_text: Date of Application, 14th Jan., 1899
Complete Specification Left, 22nd Aug., 1899-Accepted, 2nd Dec., 1899
Improvements in Apparatus for Maintaining a Constant Level on
Ships at Sea and the like, and to Prevent Jars to Cycle Saddles and
to Carriage Bodies and the like on Land.
I, RICHARD WADE JENKINS, Retired Tea Planter, of 10, Gipsy Hill, Upper
Norwood, in the County of Surrey, do hereby declare the nature of this inven
tion to be as follows:-
-
This invention relates to a method of and apparatus for maintaining in a
constant horizontal plane, or level, tables, platforms or other things for use for
many purposes on unstable structures such as ships at sea, eyele saddles and the
like.
As is well known it is one of the properties of water or other fluid, to transmit
pressure in all directions, itself being incompressible; and in considering how to
avail myself of this principle I proceed as follows:-
I construct a comparatively shallow water-tight tank, a reservoir of fluid whose
top shall itself be the level platform, or the support of the level platform, or other
thing to be kept level. The sides regulate its depth, and from the top, side, or
floor project two or more cylinders open at both ends.
One end of these cylinders communicates with the fluid, contained and confined
in the table, through suitable openings into which they are securely fitted in a
firm and water-tight manner, while the other end of each cylinder (which is
continued downwards either directly from the tank or after rising and being
bent) is furnished with a solid water-tight plug or plunger free to move in it,
up and down, in dieet contact with the fluid which fills the tank and part of the
eylinders above it and resting upon it.
Each plug or plunger is operated either though fixed posts continued down-
ward from its under surface, or directly in and through its under surface, by
suitable links or piston-rods of uniform length and strength the dimensions vary
ing as desired in each apparatus.
The links or piston-rods are each so made as to afford free movement at both
ends in two or more directions.
This invention may conveniently be considered to consist of two parts herein-
after referred to as the overpart and the underpart.
The above already briefly described parts of the apparatus constitute the over-
part.
The links, or levers connect the overpart and the underpart, and transmit the
motions of a pitching or rolling ship to the plungers.
The underpart or rocker consists of a base-board to which are firmly fixed blocks
or discs or the like, corresponding in position and number to the open bottom
ends of the before described eylinders, and these blocks support and operate the
lower ball-and-socket ends of the said links, or levers,
From the centre point in the bottom of the floor of the tank is dropped a strong
fixed leg or post, ending in a ball-and-socket support fixed to the centre of the
base-board in a corresponding position.

page_text: A strong framing may be fixed between and round the cylinders so as to add
strength and stability.
The apparatus may either be complete or simple. A complete portable
apparatus consists of preferably four uniform cylinders projecting from the tank
at points equidistant from the centre, with a base-board or underpart as before
described.
A simple apparatus consists preferably of two cylinders only projecting from the
tank also at points equidistant from the centre with a correspondingly smaller
base-board.
The complete apparatus counteracts all the motions of a floating vessel, while
the simple type counteracts the effects of pitching only or of rolling only accord-
ing as it may be placed across or fore-and-aft the deck.
In apparatus which it may be found convenient to fix and not make portable,
the lower ends of the links or levers may be fitted to any fixed part of the ship's
structure, just as for bicycle purposes they may be fixed (in the simpler form of
apparatus) directly to the bar supporting the saddle.
When the overpart and the underpart are put together with the intervening
links in place, the tank and a limited portion of the upper parts of the cylinders
being filled with fluid (and hermetically closed with the pistons are at the middle
point in the cylinders) the apparatus is ready for use.
It is therefore manifest that as the underpart rocker rests on the deck it com-
municates the motions of a pitching and rolling ship to the pistons thus afford-
ing the unaffected top of the overpart with shortening and lengthening supports
corresponding to the rising and falling deck as the ship rolls and pitches.
The apparatus may be modified without departing from the spirit of the
invention, as for instance, in the shape of the cylinders, the size of the plungers,
or the length and fittings of the piston-rods, links or levers and any unessential
parts may be omitted, or useful accessories be added.
It is readily adaptable to eyele saddles, carriage-axles and the like to maintain
steadiness and prevent jars.
Each apparatus, according to the dimensions adopted, will have a limited
angle up to which only it will work.
Dated this 13th day of January 1899.
Improvements in Apparatus for Maintaining a Constant Level on
Ships at Sea and the like, and to Prevent Jars to Cycle Saddles and
to Carriage Bodies and the like on Land.
I, RICHARD WADE JENKINS, late of 10, Gipsy Hill, Upper Norwood, S.E., now
of c/o E. M. Rossiter. Esq., 19, Cloudesdale Road, Balham, London, S.E., 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 a method of and apparatus for maintaining in a
constant horizontal plane, or level, tables platforms or other things for use for
many purposes on unstable structures such as ships at sea, bicycle saddles and
the like.
As is well known it is one of the properties of water, or other fluids, to trans-
mit pressure in all directions itself being incompressible, and in considering how
to avail myself of this principle I proceed as follows:-
☑-

page_text: I construct a comparatively shallow water-tight tank, or reservoir of fluid,
whose top shall itself be the level platform, or the support of the level platform,
or other thing to be kept level. The sides regulate its depth, and from the top,
sides or floor project two or more cylinders open at both ends.
One end of these cylinders communicates with the fluid contained and confined
in the tank, through suitable openings into which they are securely fitted in a
firm and water-tight manner, while the other end of each cylinder (which is con-
tinued downwards either directly from the bottom of the tank, or after rising
and being bent) is furnished with a solid water-tight plug, or plunger, free to
move in it up and down in direct contact with the Huid which fills the tank and
part of the cylinders above it, and resting upon it.
Each plug or plunger is operated either through fixed posts continued down-
wards from its undersurface, or directly in and through its undersurface by
suitable links, or piston-rods of uniform length and strength, the dimensions
varying as desired in each apparatus.
The links, or piston-rods, are cach so made as to afford free movement at both
ends in two or more directions.
This invention may conveniently be considered to consist of two parts herein-
after referred to as the overpart and the underpart.
The links or levers connect the overpart and the underpart, and transmit the
motions of a pitching or rolling ship to the plungers.
The underpart, or locker, consists of a baseboard to which are firmly fixed blocks
or discs, or the like, corresponding in position and manner to the open bottom
ends of the before described cylinders, and these blocks support and operate the
lower ball-and-socket ends of the said links, or levers.
From the centre-point in the bottom of the floor of the tank is dropped a
strong fixed leg, or post, ending in a ball-and-socket-support fixed to the centre
of the baseboard in a corresponding position.
A strong framing may be fixed between and round the cylinders so as to add
strength and stability.
The apparatus may either be complete or simple. A complete portable
apparatus consists of preferably four uniform cylinders projecting from the tank
at points equidistant from the centre with a baseboard or underpart as before
described.
A simple portable apparatus consists preferably of two cylinders only, project-
ing from the tank also at points equidistant from the centre with a correspond-
ingly smaller baseboard.
The complete apparatus counteracts the motions of a floating vessel, while the
simple type counteracts the effects of pitching only, or of rolling only, according
as it may be placed across or fore and aft of the deck.
In apparatus which it may be found convenient to fix and not make portable,
the lower ends of the links, or levers, may be fitted to any fixed part of the ship's
structure, just as for bicycle purposes they may be fixed, in the simple form of the
apparatus, directly to the bar supporting the saddle.
When the overpart and the underpart are put together with the intervening
links in place, the tank and a limited portion of the upper part of the cylinders
being filled with fluid and hermetically closed while the pistons are at their
middle points in the cylinders, the apparatus is ready for use.
It is therefore manifest that as the underpart rocker rests on the deck it com-
municates the motions of a pitching and rolling ship to the pistons, thus afford-
ing the unaffected top of the overpart with shortening and lengthening supports
corresponding to the rising and falling deck as the ship rolls and pitches.
The apparatus may be modified without departing from the spirit of the inven-
tion, as, for instance, in the shape of the cylinders, the size of the plungers, or the
length or fittings of the piston-rods, links or levers; and any unessential parts
may be omitted, or useful accessories be added,

page_text: It is readily adaptable to cycle-saddles, carriage axles, and the like, to maintain
steadiness and prevent jars.
Each apparatus according to the dimensions adopted will have a limited angle
up to which only it will work.
I will now more particularly describe each of the before mentioned parts of the
apparatus which is of very simple construction.
In the accompanying sheet of drawings Figure 1, is an elevation in section of
one of the four sides of a complete portable self-levelling apparatus having four
cylinders. It also represents the same elevation of one of the two sides of a
simple portable or fixed apparatus having two cylinders only.
Figure 2 is a plan of the baseboard, and attachments of a complete portable
apparatus.
Figure 3 is a plan of the baseboard of a simple portable apparatus.
Figures 4 and 5 show some of the permissible modifications of construction of
the parts shown in connection with the plungers and levers.
Figure 6 shows in outline one of the modifications of cylinders projecting from
the top or sides of the tank, the bends being all of uniform diameter continuous
with the straight parts, preferable for apparatuses of large size, to obviate the
otherwise necessary great height of the tank. The drawing is a section of one
of the four sides of such an apparatus.
Figure 7, shows one method of attaching the simple apparatus to a bicycle and
the like, any other mode of attachment being permissible.
The self levelling apparatus may be either large or small according to the
work it may be designed to perform; and the several parts are made of wood
only, or of metal only, or partly of wood and partly of metal, or of any other
Paterial possessing the necessary strength and durability.
Each apparatus according to size should be constructed to work up to a limited
angle of inclination of the baseboard, deck, or other thing (to which it may be
affixed with or without the baseboard), as shown in Figures 1, and 6.
The part of the cylinders to which the working pistons are confined should
preferably be only slightly longer than the full stroke of the plungers, such
stroke being deducible from the combined data of: (a) the distance of the
cylinders apart from each other, and (b) the roll, or angle of inclination of the
deck, or such like other thing which it may be desired to provide for. Thus, in
order to construct an apparatus with a top of about two feet square to work up
to an angle of about twenty degrees of inclination of deck, the cylinders from
centre to centre should be about (20) twenty inches apart, and about fou teen
inches long which data allow for a full piston-stroke of about four (4) inches
above and four (4) inches below the dead level, or together about eight inches
for each plunger between its highest and lowest positions in the cylinders.
1. The tank: This is a somewhat shallow reservoir A fitted with a filling-
hole and screw-plug J for hermetically closing it when filled in order to prevent
the escape of the fluid under pressure. The tank should be strongly made in
order to sustain the pressure of its fluid contents when acted upon by the plungers
as well as to support heavy weights. It should be quite water- and air-tight
except at the openings through which it accommodates and communicates with
the cylinders. This either angular or circular tank should be filled with fluid
to its utmost available capacity. Should it be desired to limit the capacity of the
tank a number of corner blocks or top and bottom pieces may be fixed inside
but always so as not to interfere with the movement of the fluid and of the dis-
tribution of the pressure through the fluid between the cylinders. The depth
and capacity of the tank should be adapted to the size of the apparatus, and the
work it has to perform.
The top of such tank is itself the level platform or support of the thing to be
kept level. The superficial dimensions of the apparatus may vary from a few
inches up to as many feet.
As an equivalent to a simple tank, a system of bent tubes uniform in diameter

page_text: with the external cylinders, and with each other, may radiate from a cential
comparatively small reservoir of fluid in which at one of their ends such tubes
communicate with each other through the fluid, from opposite directions, and at
the other ends with the cylinders, of which they may be considered to be continua-
tions within the protecting box or tank,--all such modifications and adaptations
of the principle of an overtank being equivalent means to the same end, noi
departing from the spirit of the invention.
2. The cylinders: These, B, are strong, preferably round, metallic tubes open
at both ends, and either project directly downwards from the bottom of the
tank equidistant from its centre, as in Figures 1, 4, 5 and 7, or after turning
upwards from the bottom, or sides, or tops of the tank are bent back again down-
wards sufficient to afford the necessary vertical working space for the plungers
and levers, as shown in Figures 6.
The cylinders should fit firmly into the tank, and be water- and air-tight, and
may be flanged and show a workmanlike finish externally.
High cylinders, such as in Figure 6, may either spring upwards from close to
the tank, or at any convenient distance from it, as through an intervening
partition.
As in the type of the apparatus shown in Figures 1, 4. and 5 the length of the
cylinders cannot be increased (in order to enlarge the size of the apparatus)
without unduly elevating the top to an impracticable height, the type shown in
Figure 6 of the drawings has been devised preferably for apparatuses of large
size in which case the inclination of the deck or the like has alone to be con-
sidered the height of the tank above the deck being a fixed quantity at the centre-
post varying with the size of each apparatus.
The cylinders should be of uniform size and diameter for each apparatus, and
be like each other in all respects, so that the fluid passed from the one may exactly
fill the same space neither more or less left by the falling plunger in the opposite
corresponding cylinder.
Opposite cylinders should be alike in position at opposite points, in the com-
plete form of the apparatus at the four corners or angles of the tank equidistant
from its centre.
Externally the cylinders should bear some mark indicating the highest, middle,
and lowest positions of the tops of the plungers working within them as at M, N
and ().
Figure 6 shows this type of the apparatus in outline the strength and size of the
several parts and the method of fitting them firmly together may vary and be
determined at pleasure by the users and manufacturers, without departing from
the spirit of the invention. The drawing, Figure 6, shows an elevation in section
of one of the four sides of such an apparatus.
The Plungers: These, C. are solid valveless pistons exactly filling the
cylinders, diametrically, in which they are free to move and are air and water-
tight under pressure.
In order to maintain a co-axial position with the vertical axis of the cylinders
in which they work without suffering any lateral displacement, the plungers
should be not less deep than broad: and when they accommodate the ball-and-
socket equivalent ends of the levers, they should be made sufficiently long, or
of any length up to or slightly exceeding the working part of the cylinders, N
to ), as (Figure 5.
The plungers at their upper surfaces should be fitted with expanding leather
rings, (, or equivalent packing, to prevent leakage under pressure.
From the undersurface they may communicate through a fixed piston-post, I
(Fig. 4), and short-lever-links, 1 to blocks F, or equivalent, on the baseboard G
as in Figures 4 and 5: or, dispensing with these intervening fixed posts D) they
may receive in their undersurface the upper ball-and-sockets D of the piston-
rods or lever-links D' as in Figures 1, 5 and 6.
Ipon the upper surfaces of the plungers will rest evenly distributed through

page_text: the superincumbent fluid, the whole weight and pressure of the overpart except
insofar as this is shared by the adjustable centre-post H.
4. Piston-rods, levers: Preferring the combined modification of these parts
of the apparatus as shown at 12 and 13 Figures 1 and 6 of the drawings I also
show in Figures 4 and 5 some permissible modifications such as the fixed piston-
post D, Figure 4, and the long plunger (in Figure 5, both with short lever-
links such modifications being applicable to all types of the apparatus.
The lever-links and balls Di, 12 and 13 whether short or long being the chief
working parts should be strong and well made and accurately fitted and particu-
larly in apparatuses having four cylinders should terminate at both ends in balls-
and-sockets, or equivalents (such as small gimbals or double rings) free to move
in four or more directions as shown in Figures 1, 4, 5 and 6. In the simple form
of the apparatus having only two cylinders the lever-links at the bottom ends
should be simply hinged to move only in two directions in one plane, as shown in
Figures 3 and i.
A sufficient part of the balls should be left out of the sockets to afford free
movement within the desired limits to the rods or lever-links to which they are
attached. This play of the piston-rods or of the short lever-links should not be
more than sufficient to allow unimpeded action to the plungers: high necked
socket-rings and other rings fitted in the mouths of the cylinders, judiciously
placed blocks, such as Q Figures 1 and 7 and the free use of guides and springs
and the like will be useful to check any tendency to instability of the heavy over-
part supported on balls-and-sockets.
The above described parts constitute the overpart of the self-levelling apparatus,
with its rods and lever-links connecting it to the baseboard, (, or rocking under-
part (where this is used to constitute a portable apparatus), or to the equivalent
of the baseboard (as shown in Figure 7) and the like, except in so far as the
centre-post, If, and the framing, I, to be hereinafter described, may also be con-
sidered to belong to the overpart.
5. The baseboard:-This, G, in all the figures of the drawings (together with,
or, it preiened, without the lower, terminal blocks, F, attached to it) constitutes
the chief and essential underpart of a portable self-levelling apparatus, though
it may be dispensed with, it desired, in fixed types of the apparatus resting on
equivalent supports.
The last board should preferably be somewhat larger than the top of the tank,
and he mude of planks boards, or the like, of any suitable thickness or strength,
and be fitted with foot-holds or any other device to fix it in position wherever
used.
The block, F, or equivalent, supporting the vertical centre-post, should le
exactly in the centre of the basebeard, and the corner or side blocks supporting
the lever-links (as shown in position in Figure 2 of the drawings) should prefer-
ably be somewhat wider apart than the axes of the overhanging cylinders in order
that the piston-rods, or levers, may incline or lean inwards towards the centre
in all positions of the plungers, not only to afford the necessary play to prevent
jamming but also because in the case of the lever-links being all together per-
fectly vertical, the overpart might then be in a state of unstable equilibrium.
Opposite leaning lever-links deep plungers and the blocks and guides before men-
tioned will cheek any tendency to shakiness of the apparatus.
The base board may be dispensed with in all types of the apparatus not intended
to ho pertable, in which case the lower ends of the lever-links may be attached
as desired to any fixed part of the ship deck on the like, as in Figure 6 or to
cycles, carriage axles, or the like.
6. The centre-post, or leg. From the centre-point in the bottom of the tank
externally may be dropped a strong supporting fixed leg or post, H, terminating
at its lower end preferably in a comparatively larger ball-and-socket than the
halls-and-sockets of the lever-links. This centre-post is firmly fixed and held in
a vertical position to the centre-point of the bottom of the tank, the ball of its

page_text: lower end being supported by and freely working in a socket attached over the
centre-point of baseboard, or equivalent.
As the purpose of this fixed vertical centre-post is to share with the plungers
the dead weight of the apparatus, and to help to keep it steady, it should b.
correctly centred and be commensurably strong, and be adjustable H as to length
so as not to exert any lifting or independent support.
The centre of this middle larger ball-and-socket-support to the centre-post is
the centre of rotation of the whole underpart, and in order to insure smoothness
of action and prevent the jamming of the moving parts the centres of all the
other lower balls-and-sockets should be in the same horizontal plane as the centre
of this larger middle ball-and-socket. Then, as the baseboard, G, or equivalent,
rocks within the assigned limits round about this fixed central ball, so will it
also rock 1ound the other lower balls, as they yield from their leaning position,
when on the level, to preferably a not quite vertical position when at their
highest and lowest points.
7. Framing, and accessories:-The supporting frame, I. of wood, or of rods
and bands may be fitted round and between the cylinders, and be fixed and
arranged as desired, so as to afford support and strength to the cylinders and
centre-post.
Also any number of useful accessory aids in the shape of clamps, foot-holds,
check-chains springs, guides, guards, blocks, and the like, varying with the size,
strength and type of apparatus, may be used as desired without affecting the
spirit of the invention.
8. The simple type of the apparatus with only two cylinders: --When used
at sea this type of the apparatus would counteract the effects of the rolling of the
vessel when placed across-ship, or the effects of "pitching" when placed fore aud
aft relative to the ship.
On land it is intended chiefly to counteract the effects of jars and oscillations
to cycle-saddles and carriage bodies.
Figures 3 and 7 of the drawings show one method of constructing such a
simple self-levelling apparatus, and adapting it to the support of cycle saddles
and the like. In this case the size of the apparatus must necessarily be very
small and narrow but also very strong and may have a tank shaped like the saddle,
that is to say narrower in front than at the back for the same reason that the
saddle is so made (as shown by dotted lines in Figure 3) with a plunger-stroke
not much exceeding half to one inch. In this case in order to gain length of
cylinders without much height these are made if desired to rise and are so fixed
within the tank above its floor as seen in Figure 7 of the drawings. Being con-
structed with only two cylinders in the positions as shown in Figure 3 of the
drawings the movement or swing of the piston-rods or lever-links in very small
apparatuses of this type should preferably be confined at their lower ends to the
forward and backward directions of one plane only so that the lever-links may be
attached to the plungers at one end by ball-and-socket and to the support at the
other end or even at both ends by means of simple hinges 1) Figure 7 (in place
of balls-and-sockets) affording fore and aft movement only. To afford width
enough for stability of support, the cycle and the like should preferably be made
with a stout or double saddle-carrying-bar, V, Figure 7, upon which to rest and
firmly fix the baseboard equivalent.
At each end in front and back, strong blocks Q are preferably fixed to limit
the action of the plungers within the cylinders in case of excessive shocks from
any cause and a small adjustable (as to length) fixed centre-post may also be
used as before described, but in this case hinged like the levers.
Regarding the contrivance as a whole it only remains to say that it may be
constructed of any desired shape, size and strength, from a top of a few inches
for the support of delicate instruments, to one of as many feet- with other parts
in proportion -sufficiently strong to support machine-guns, torpedo-tubes, and
other structures and things.

page_text: When the weight of the overpart itself is not sufficient to afford ample resis-
tance to any disturbing action of the plungers it may be additionally and suitably
weighted.
Mode of filling and using. The overpart and the underpart with the inter-
vening lever-links having been put together and the centre-post thrown out of
action, the overpart is propped up level with the upper surfaces of each plunger
at the, M, or middle points of the cylinders equidistant from the highest, N, and
lowest, O, points of the stroke. The tank and the cylinders above M should then
be filled with water, or other suitable fluid, through the filling-hole J, to the
full capacity, overflowing, when the screw-plug should at once hermetically seal
up the fluid in order to prevent its escape when under pressure.
The apparatus
having been constructed, and finished and put together in the manner herein-
before described and ascertained-the temporary props been removed, and the
centre-post adjusted--is now ready for use, the overpart resting through the fluid
with equal pressure solely on the plungers and the centre-post. This pressure is
equally distributed through the fluid, no matter on what part of the top or level
platform such pressure may be applied, the plungers moving freely up and down
in response to the movements of the ship, or the like, like a well-balanced pair
of scales operated from below.
It is obvious that as the under part or support rests on the swaying ship or
the like, it partakes of all the motions and communicates them through the levers
to the plungers acting directly upon the confined fluid. As a plunger rises,
forced up by the rising deck, the pressure which it exerts upon the fluid sup-
ported above it, acts instantly through the incompressible water on the opposite
falling piston, the mobile fluid thus forced from the one cylinder at once occupy-
ing exactly the same space in the opposite cylinder above the falling piston.
But inasmuch as the falling piston, necessarily following the declining deck,
would leave a vacuum, it is instantly followed by the fluid above it so that the
opposite corresponding rising plunger, not only finds small resistance to over-
come in lifting and following its superincumbent fluid, but is simultaneously
urged to its work by the pressure of the atmosphere below it, thus providing the
overpart with legs or supports lengthening and shortening in response to the
rising and falling deck, leaving the horizontal position of the overpait unaffected.
The before described apparatus while especially applicable for use on floating
vessels at sea is also very useful on land as a support for cycle-saddles and
carriage bodies, and the like.
The before de cribed apparatus may be modified in detail and in the form and
construction of the parts without departing from the spirit of the invention.
Among the many uses to which the invention may be applied the following
may be mentioned:-
On warships and ocean-going steamers and the like, as carriages for light guns,
platforms from which to discharge torpedos, supports for search-lights binacles
and other scientific instruments, platforms upon which officers may occasionally
stand when taking observations and, at other times, as a relief from the pitching
and rolling of the ship's motion. As steadiers for deck-chairs, seats, benches;
berths, tables and the like.
On land for counteracting or destroying jars and oscillations when used as
supports for all kinds of cycle-saddles, and of auto-mobile cars and other carriages
and the like when fixed to their axles.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be petiormed I declare that what
I claim is:
1. The hereinhetore described method of maintaining a constant plane or level
platform in floating vessels and the like, and of counteracting and mitigating
jars and oscillations to eyele saddles, automobile cars, carriages, and the like by
means of an apparatus comprising a water-and-air-tight overtank reservoir-of-

page_text: fluid such as A from which project cylinders such as B connected at one end
with the fluid in the tank, and at their other end with solid plungers such as C
or free to move up and down within the said cylinders in a water-tight manner
acting and re-acting upon each other through the fluid confined above them in
the said cylinders and tank when the movements of the vessel and the like or of
the cycle or carriage and the like are transmitted to the said plungers by means
of piston-rods and levers such as D, D1, D2, D3, D' suitably hinged to the said
plungers at one end and at the other end to a base board such as ( or otherwise
to the structure of the ship or of the cycle carriage and the like, thus affording
(in addition to an adjustable vertical steadying centre-post such as H) supports
which lengthen and shorten in response to the said movements leaving the hori-
zontal position of the overtank unaffected substantially as described and illustrated
in the accompanying drawings.
2. The combination and arrangement of parts constituting the complete and the
modified apparatus substantially as described and illustrated in the accompany-
ing drawings.
3. The construction and use of such apparatus for maintaining a constant plane
or level platform and for mitigating jars and oscillations substantially as
described and illustrated in the accompanying drawings.
Dated this 92nd day of dunst 1900
RD. WADE JENKINS,
Applicant.