IMPROVEMENTS IN THE MEANS OR APPARATUS FOR TRANSMITTING, AL- TERNATING, AND CONTROLLING THE MOTIONS OF CRANES, CRABS, HOISTS, AND OTHER CONSTRUCTIONS REQUIRING SIMILAR MOTIONS
Year: 1877

page_text: LETTERS PATENT to John Clayton Mewburn, of. 169, Fleet Street, in the City
of London, Patent Agent and Consulting Engineer, for the Invention of
"IMPROVEMENTS IN THE MEANS OR APPARATUS FOR TRANSMITTING, AL-
TERNATING, AND CONTROLLING THE MOTIONS OF CRANES, CRABS, HOISTS, AND
OTHER CONSTRUCTIONS REQUIRING SIMILAR MOTIONS." A communication from
abroad by Thomas Aldridge Weston, of Stamford, Connecticut, in the United
States of America.
Sealed the 29th September 1877, and dated the 31st March 1877.
PROVISIONAL SPECIFICATION left by the said John Clayton Mewburn at
the Office of the Commissioners of Patents on the 31st March 1877.
JOHN CLAYTON MEWBURN, of 169, Fleet Street, in the City of London, Patent
Agent and Consulting Engineer. "IMPROVEMENTS IN THE MEANS OR APPARATUS
FOR TRANSMITTING, ALTERNATING, AND CONTROLLING THE MOTIONS OF CRANES,
CRABS, HOISTS, AND OTHER CONSTRUCTIONS REQUIRING SIMILAR MOTIONS." A com-
munication from abroad by Thomas Aldridge Weston, of Stamford, Connecticut,
in the United States of America.
This Invention relates to transmitting alternately and controlling the motions of
cranes, crabs, hoists, and other constructions requiring similar motions.
In order to enable the hoisting and lowering motions of cranes and other like
constructions, such as crabs or hoists, to be transmitted and alternated with greater
despatch and safety than heretofore, I place the winding drum loosely upon the
main shaft, and fix securely upon the same shaft the main driving wheel or spur
wheel. The drum is connected with the driving wheel, preferably by means of the
friction disc described in the Provisional Specification of an Invention for "Im-
provements in the Construction of Friction Couplings," lodged by me on the 28th
March 1877, No. 1229, in combination with the safety incline motion described in
the Specification of Thomas Aldridge Weston's Letters Patent, dated June 6th,
1868, No. 1867. I employ two countershafts, or first and second movers, the
outer ends carrying sprocket wheels or winch handles, and the middle portion
[Price 6d1

page_text: provided with gearing as follows:-Each countershaft has towards one end a
pinion geared to the main wheel, both pinions running loosely on their shafts, but
connected therewith by ratchet clutches, such as are described in the Provisional
Specification of an Invention for "An Improved Ratchet Clutch," lodged by me on
the 28th March 1877, No. 1230. Both ratchet clutches must be right-hand ones, or
both left-hand, so that the shafts can each drive thereby the main wheel only in
one direction. Upon the first countershaft I key a pinion which is engaged or
geared with a wheel of larger diameter keyed to the second countershaft. By
rotating the first countershaft in the direction to drive through its ratchet pinion
the main wheel, a quick speed is obtained for hoisting. By rotating it contrariwise
it drives the main wheel still in the same direction, but at a slower speed, through
the intervention of the wheel and pinion keyed respectively to the two counter-
shafts, and of the ratchet pinion upon the second countershaft. By applying the
motive force to the sprocket wheel on the second countershaft in a direction to
drive back through the first countershaft and its ratchet pinion, a still quicker 1
speed than the first named is imparted to the main wheel. Thus three separate
speeds of hoisting are readily obtained and may be alternated at pleasure, and
perfect security against running down is provided by the improved ratchet clutches.
Lowering is effected direct from the main shaft by the incline apparatus and
friction discs above referred to. Sometimes I substitute for the ratchet clutches
the inclines and friction surfaces of the aforesaid Letters Patent, dated Juno 6th
1868, No. 1867.
For the purpose of transmitting and controlling the travelling motions of cranes
and of other constructions requiring similar motions, I adopt the following methods,
which I will describe in connection with an "ovorhead" travelling crane, having
the usual pair of rails or railway track, and thereon the usual girder bridge
spanning the same, and a crab or hoist to move to and fro upon the bridge. For
brevity I will suppose the railway to point north and south, and the bridge due
east and west. Upon a projecting stud or stationary shaft fixed to the crab or
hoist I place loosely side by side two toothed chain wheels or drivers, each one
having cast upon or fixed to it a sprocket or rope wheel carrying the usual endless
hand rope. These two chain wheels or drivers engage respectively with two chain
cables held thereto by suitable guide sheaves.
The path or course of the two cables is as follows:-One cable has its end
securely fixed, say at the north end of the east rail of the railway, and it passes
southerly along this rail to the east end of the travelling bridge, there turning
at a right angle around a guide sheave, and westwards along the bridge to the
crab, where it is guided around its chain driver, and onwards to the west end of
the bridge, where it turns at a right angle around a guide sheave, and follows the
line of the west rail of the railway to its southern extremity. The other cable has
one end fixed at the north end of the west rail of the railway, and passes parallel
along this rail southwards to the west end of the bridge, there turning at a right
angle, and along the bridge eastwards to the crab, and around the other chain
driver; thence onwards across the bridge to the cast end, where this cable turns
again at a right angle, and follows the east rail of the railway to its southern
termination. The four ends of the two cables are severally fixed and strained by a
weight or spring to ensure tightness throughout. They cross cach other on the
bridge, the intersection being at the chain drivers. The two endless hand ropes serve
to rotate their respective chain wheels, which grasp or ongage with the fixed cables,
and impart the travelling motions to the bridge and crab thus; By turning the
two chain wheels in the same direction simultaneously, the bridge is hauled along
the cables and railway either north or south, as desired, whilst the crab remains in
the same position on the bridge. By turning the chain wheels in contrary directions
simultaneously, the crab is hauled east or west along the bridge, as desired, the
bridge being at rest. A diagonal motion in either one of four directions is obtained
by pulling one side only of one of the endless hand ropes.
I apply the Invention to radial or swing cranes by providing a circular track

page_text: above the crane, of which the crane post is the centre. The two cables are jointed
to encircle this track, from which they pass inwards along the boom or horizontal
beam of the crane to the travelling carriage or crab thereon. The cables pass thence
to the crane post, where their ends are joined in a pendant loop, in which a weight
is suspended to keep the cables tight throughout. The chain drivers before referred
to are fixed in a similar manner to the crab, and thereby the radial motion of the crab
upon the boom and the circular motion of the boom around the track are each
imparted, as required, by the two chain drivers and the endless hand rope, hemp, or
wire rope; or other flexible connectors may be substituted for the chains; and at all
points of deflection guide sheaves are placed to change the course of the cables
without undue friction.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Clayton Mewburn in the Great Seal Patent Office on the 29th
September 1877.
JOHN CLAYTON MEWBURN, of 169, Fleet Street, in the City of London, Patent
Agent and Consulting Engineer. "IMPROVEMENTS IN THE MEANS OR APPARATUS
FOR TRANSMITTING, ALTERNATING, AND CONTROLLING THE MOTIONS OF CRANES,
CRABS, HOISTS, AND OTHER CONSTRUCTIONS REQUIRING SIMILAR MOTIONS." (A com-
munication from abroad by Thomas Aldridge Weston, of Stamford, Connecticut,
in the United Statesof America.)
This Invention relates to transmitting, alternating, and controlling the motion
of cranes, crabs, hoists, and other constructions requiring similar motions.
The first part consists of an improved construction of gearing to enable the
hoisting and lowering motions of cranes and other like constructions, such as crabs
or hoists, to be transmitted and alternated with greater despatch and safety than
heretofore. I place the winding drum loosely upon the main shaft, and fix securely
upon the same shaft the main driving wheel or spur wheel. The drum is connected
with the driving wheel, preferably by means of the friction disc described in the
Specification of Letters Patent for " Improvements in the Construction of Friction
Couplings," granted to me on the 28th March 1877, No. 1229, in combination with
the safety incline motion described in the Specification of Thomas Aldridge
Weston's Letters Patent, dated June 6th 1868, No. 1867. I employ two counter-
shafts or first and second movers, the outer ends carrying sprocket wheels or winch
handles, and the middle portions provided with gearing as follows:-Each counter-
shaft has towards one end a pinion geared to the main wheel, both pinions running
loosely on their shafts, but connected therewith by ratchet clutches, such as are
described in the Specification of Letters Patent for "An Improved Ratchet Clutch,"
granted to me on the 28th March 1877, No. 1230. Both ratchet clutches must be
right-hand ones, or both left-hand, so that the shafts can each drive thereby the
main wheel only in one direction. Upon the first countershaft 1 key a pinion
which is engaged or geared with a wheel of larger diameter keyed to the second
countershaft. By rotating the first countershaft in the direction to drive through
its ratchet pinion the main wheel, a quick speed is obtained for hoisting. By
rotating it contrariwise it drives the main wheel still in the same direction, but at
a slower speed, through the intervention of the wheel and pinion keyed respectively
to the two countershafts, and of the ratchet pinion upon the second countershaft.
By applying the motive force to the sprocket wheel on the second countershaft in
a direction to drive back through the first countershaft and its ratchet pinion, a still
quicker speed than the first named is imparted to the main wheel; thus three
separate speeds of hoisting are readily obtained, and may be alternated at pleasure,
and perfect security against running down is provided by the improved ratchet
clutches. Lowering is effected direct from the main shaft by the incline apparatus

page_text: and friction discs above referred to. Sometimes I substitute for the ratchet clutches
the inclines and friction surfaces of the aforesaid Letters Patent, dated June 6th
1868, No. 1867.
The second part of the Invention consists of an improved mode or method
of transmitting and controlling the travelling motions of cranes, and of other
constructions requiring similar motions. I will describe the same in con-
nection with an "overhead" travelling crane having the usual pair of rails or
railway track, and thereon the usual girder bridge spanning the same, and a crab
or hoist to move to or fro upon the bridge. For brevity, I will suppose the rail-
way to point north and south, and the bridge due east and west. Upon à projecting
stud or stationary shaft fixed to the crab or hoist I place loosely side by side two
wheels or drivers, each one having cast upon or fixed to it a sprocket or rope
wheel carrying the usual endless hand rope. These two wheels or drivers
engage respectively with two cables held thereto by suitable guide sheaves.
The path or course of the two cables is as follows:-One cable has its end
securely fixed, say, at the north end of the east rail of the railway, and it passes
southerly along this rail to the east end of the travelling bridge, there turning at a
right angle around a guide sheave, and westwards along the bridge to the crab,
where it is guided around its driver, and onwards to the west end of the bridge,
where it turns at a right angle around a guide sheave, and follows the line of the
west rail of the railway to its southern extremity. The other cable has one end
fixed at the north end of the west rail of the railway, and passes parallel along
this rail southwards to the west end of the bridge, there turning at a right angle
and along the bridge eastwards to the crab and around the other chain driver;
thence onwards across the bridge to the east end, where this cable turns again at a
right angle, and follows the east rail of the railway to its southern termination.
The four ends of the two cables are severally fixed and strained by a weight or
spring to ensure tightness throughout; they cross each other on the bridge, the
intersection being at the chain drivers. The two endless hand ropes serve to rotate
their respective chain wheels, which grasp or engage with the fixed cables, and
impart the travelling motions to the bridge and crab thus; By turning the two
chain wheels in the same direction simultaneously the bridge is hauled along the
cables and railway either north or south, as desired, whilst the crab remains in the
same position on the bridge. By turning the chain wheels in contrary directions
simultaneously the crab is hauled east or west along the bridge, as desired, the bridge
being at rest. A diagonal motion in either one of the four directions is obtained
by pulling one side only of one of the four endless hand ropes.
I apply the Invention to radial or swing cranes by providing a circular track
above the crane of which the crane post is the centre. The two cables are joined to
encircle this track, from which they pass inwards along the boom or horizontal
beam of the crane to the travelling carriage or crab thereon. The cables pass
thence to the crane post, where their ends are joined in a pendant loop, in which a
weight is suspended to keep the cables tight throughout. The cable or chain
drivers before referred to arc fixed in a similar manner to the crab, and thereby
the radial motion of the crab upon the boom, and the circular motion of the
boom around the track are each imparted as required by the two chain drivers and
the endless hand ropes. Hemp or wire rope, or other flexible connectors, may be
substituted for the chains, and at all points of deflection guide sheaves are placed to
change the course of the cables without undue friction.
Having explained the nature of the Invention, I will proceed more particularly
to describe, with reference to the accompanying Drawings, the manner in which
the same is to be performed.
Figure 1 is a longitudinal elevation partly sectional; and Figure 2, a plan of a
crab or hoist constructed according to the first part of the present Invention.
A, A¹, are the end frames of the crab united by stay bars A"; B is the drum or
barrel placed loosely upon the shaft C; D is the main wheel keyed to the shaft C.
The drum B is connected with the driving wheel D, preferably by the wooden

page_text: friction discs E and iron ones G, the construction and operation of which are set
forth in the Specification and Drawings of the Letters Patent granted to Thomas
Aldridge Weston, on the 29th January 1863, No. 263; and, further, in the Specifi-
cation and Drawings of Letters Patent, granted to me on the 28th March 1.877;
No. 1229. F is a sprocket whicel, one boss of which, F, forms an incline or screw
face to act upon the similar screw face of the fixed collar H, as shewn in Figure 1,
and the other boss of larger diameter rubs frictionally against the end of the drum B,
as fully described in the Specification of Thomas Aldridge Weston's Letters Patent,
dated June 6th 1868, No. 1867. The sprocket wheel F serves to apply and with-
draw through the drum B the end pressure for frictionally connecting discs E, G,
for hoisting and lowering in the manner of the last-named Invention set forth in
the Specification of the aforesaid Letters Patent of June 6th 1868, No. 1867.
The change of speeds in hoisting is thus effected, viz.; I and Jare the two counter
shafts with attached sprocket wheels I', J', and equal pinions I", J", placed loosely
thereon and engaged always with the main wheel D. Each pinion I, J", is simi-
larly provided with the improved ratchet clutch described in the Specification of my
Letters Patent of the 28th March 1877, No. 1230. The ratchet clutches are aliko,
and can drive their respective pinions in one direction only, as shewn by the arrows
thereon, in a direction corresponding with the one motion of the main wheel D,
shewn by its arrow. Upon the shaft I is keyed the pinion K, gearing with the
wheel L, keyed to the shaft J.
By rotating the sprocket wheel I' in the direction of the arrow thereon, the shaft I
drives the pinion I through its ratchet, and thereby the wheel D in the direction of
the arrows.
The consequent notions of the pinion K, wheel L, and ratchet wheel
of the pinion J, are indicated by the arrows thereon, respectively, and the ratchet
wheel of the pinion J2 is then slipping or running backwards. This hoisting motion
last described from pinion I, is the "single purchase" motion of the crab. By
reversing the motion of the sprocket wheel 1', the ratchet of the pinion I* slips, and
the driving is then effected through the pinion K, wheel L, and ratchet pinion J* at
a slower speed due to the relative diameter of K. and L.
By rotating the sprocket wheel J', as indicated by the arrow thereon, the wheel L,
drives the pinion K and pinion I at an increased velocity due to the superior
diameter of the wheel L to that of the pinion K, and thereby the fastest speed of
the crab is obtained. Upon ceasing to hoist the ratchet clutches and keyed
wheels, K and L prevent any back motion in the main wheel D, and the couse-
quent running away of any load suspended, which is also further prevented by
the hooked paul M, and a circle of ratchet teeth M³, cast upon the wheel D.
N is a hoop or shallow drun also cast upon the wheel D to contain the friction
discs E, G.
In lieu of ratchet clutches on the pinions 12, J, frictional incline clutches capable
of driving one way only, may be employed, such as are represented and described in
the Specification of the aforesaid Letters Patent, dated June 6th 1868, No. 1867.
The sprocket wheels 1', J', provided with the usual endless ropes may be replaced
by winch handles if desired, and the sprocket wheel F by a hand wheel.
By this improved construction of a crab or hoist, any one of three varying speeds
of hoisting or driving may be employed at pleasure, and the load always left safely
in suspension until lowered in the manner herein-before described.
This first part of my Invention is obviously applicable to other machines than
crabs or hoists, which may require the variable driving motions thereby obtained
such as herein set forth and shewn in the accompanying Drawings, presses for
example.
Figure 3 is a plan, and Figure 4 a sectional elevation through the line 1, 1; and
Figure 5 is an end elevation of a travelling crane constructed with the improvements
forming the second part of this Invention; Figures 6 and 7 are details; Figure 8
is a plan; and Figure 9, a side elevation of a modification.
As herein-before stated, I will suppose the railway or track to point north and
south. A moving bridge of ordinary construction A with travelling wheels a spans

page_text: the railway. Upon the bridge is placed the travelling carriage or crab B, having
flanged wheels b, upon which it traverses the bridge cast and west, the bridge
travelling north and south upon its track or railway. These travelling and traversing
motions are effected by the means herein-after described, the prominent feature
being the fixed cables C, D, of chain or of wire rope, the ends of which are
secured and kept strained by the strainers C', C, D', D². The four sheaves X
are a mere convenience in turning the cables downwards to the strainers acci-
dentally located below, and are therefore not again referred to. The cable C
approaches from the north the guide sheaves a fixed to the bridge A, then at
right angles westwards to the sheave b', fixed to the moving carriage B, and at
this point the cable appears in section on the sheave b' to the right in Figure 4; it
passes thence upwards and over the driving pulley E; thence downwards beneath
the sheave b; thence west to the sheave a on the bridge; and thence south, parallel
with the west rail. The cable D from the north approaches the fixed sheave a³ ;
thence to the sheave 6 on the carriage or crab the inner or left-hand sheave of the
pair on the right in Figure 4; thence upwards over the driving pulley F; thence
downwards and underneath the sheaves 65, and eastwards to the fixed sheave a¹;
and thence south, parallel with the east rail.
The driving pulleys E, F, are suitably V grooved at their rims, or otherwise
formed to grasp the fixed cables C, D, firmly, and thereby haul the carriage along
the bridge, and the bridge along the railway. The driving pulleys are attachod
respectively to the sprocket wheels E', F', shewn separately in Figure 6, and they
are provided with endless hand ropes or chains e, f, for rotating them. To secure
sufficient adhesion between the cables and the grooves of the driving pulleys, the
cables must be permanently loaded or strained. One form of device for this purpose
marked C1, C2, is shewn in Figures 3, 4, and 6, Figure 6 being an enlarged view on
the line 3-3 of Figure 4. The end of the cable C is attached to the slide bar G,
which is pulled inwards by a coiled spring G'. A flat spring H presses the rack
teeth of the bar G against the stop or catch G2, preventing any backward motion in
the bar G, and affording solid resistance to the pull upon the cable during the hauling
of the crane along its ways; and thereby any slackness in the cable is automatically
taken up and retarded.
Another form of strainer is shewn at D', D2, Figures 3, 4, and 7, Figure 7 being
an enlarged view on the line 4-4, Figure 4. I is a pulley turning on a stud or pin
fixed to the frame of the crane. To its smaller diameter or boss I¹ the end of the
cable is attached for winding thereon. Its larger diameter 1ª has ratchet teeth, and
a central groove in which is fastened the end of a cord I³ carrying a bob or weight
13, Figure 4, by the gravity of which the cable D is continually strained. The
ratchet teeth and pawl J, Figure 4, retain all the cord taken up upon the strainer,
and resist the pull of the crane in its travelling motions.
The operation is as follows:-To move the bridge southwards pull the endless
ropes or chains e, f, downwards simultaneously on the north side, the operator
facing south and walking after the crane as it moves. In this movement the
cables C, D, are pulled around the sheaves a², a, towards the carriage B, which
remains stationary upon the bridge under the equally opposed strains on the cables
whilst the bridge is thereby hauled south along the railway. A contrary movement
of the bridge to the north is obtained by pulling the ropes c, f, together on the
south side, the operator facing north. To move the crab upon the bridge to the
cast the rope e must be pulled on its south side, and the rope fon its north side
simultaneously, the operator facing east and moving with the crab. The contrary
movement of the crab to the west is obtained by simultaneously pulling the rope e
on its north side, and fon its south side, the crab then hauling itself along the
cables C, D, towards the sheaves a³, a², the bridge being at rest in both cast and
west movements of the crab. Diagonal motions of the crab, due to the simultaneous
motion therewith of the bridge, are obtained in four directions by pulling one side
only of either endless rope. For example, a downward pull upon the north side of
the rope e tends to haul the crab west towards the sheave a², and equally to haul

page_text: the sheave a with that end of the bridge southwards along the wost rail. Tho
crab can readily yield to the pull, and in so moving west the driving pulley F with
the sheave 6 receive motion as they are traversed along the cable Ď, and a
corresponding pull is thereby exerted upon the said cable, which with equal force
tends to move the sheave a southwards along the east rail. The bridge is therefore
pulled to the south at both ends simultaneously with the westward motion of the
crab under the direct pull on the north side of the rope e, and a south-west diagonal
movement in the crab and load is the result. The other three diagonal movements
due to pulling singly upon the remaining sides of the two endless ropes occur in
similar manner, all being dependent upon the frictional resistance of the unused
sprocket wheel, driving pulley, and sheaves, from trailing them along the stationary
cables.
Figures 8 and 9 shew the improvements as applied to a sliding truck or carriage
for suspending a pulley block, or portable hoisting tackle, or other object for which
horizontal travelling motions are required; K is the cross beam or bridge with
travelling wheels V and guide sheaves k¹, k³, k³, k'; L is the truck with travelling
wheels k, l, above the beam, and a cross pin m at its lower extremity below the
same to which the tackle blocks or load may be hung; 1,,,, are guide sheaves
pinned to the truck; O is a stud or pin fixed to the truck L, upon which turns a
sprocket wheel M¹, and its attached driving pulley M, engaging with the cable D,
and shown in dotted lines Figure 9; N¹ is a similar sprocket wheel and driving
pulley N turning on the stud 0¹, and engaging with the cable C upon the opposite
or north side of the truck L. The cable C approaches from the north the sheave k¹,
thence over the sheave on the truck and around the driving pulley N, thence
upwards over the sheave, and to the sheave 2, and thence south, along the west
rail. The cable D from the north turns around the sheave to the sheave on the
truck, thence downwards around the driving pulley M, and upwards around the
sheave to the sheave , from which it passes south along the cast rail. The
cables in this last described crane, Figures 8 and 9, cross each other at the sheaves
2,³, instead of intersecting upon the crab, as in Figures 3, 4, and 5, and the
sprocket wheels are parallel to the plane of the bridge instead of being at right
angles therewith.
The north and south motions of the bridge in Figures 8 and 9 are produced by
rotating the sprocket wheels in contrary directions, and the east and west move-
ments of the crab by rotating them together in the same direction; and the diagonal
motions are obtained by pulling singly either one of the four sides of the endless
ropes. An instant change of direction in the motion of the crab is therefore obtained
by means of this Invention, as quickly as the operator varies the direction of his
applied force, without any throwing of clutches or alteration in the gearing of the
crane.
It is obvious that the cables in passing from the bridge to their termini may
be threaded around the sheaves of a second crane, or a third, or other desired
number, such as the length of railway may accommodate, and cach crane can then
work independently. When two cranes are employed on the same rails, and the
lift is heavier than either is capable of, the two may be brought together and jointly
lift or travel with the same load.
The cranes may also be arranged upon separate tracks at different levels, one
above the other. Where it is desired to travel the bridge on its track by a sprocket
wheel or other rotating driver fixed to the bridge, the two driving pulleys E, F,
Figures 3, 4, and 5 may be secured together, and also to a single sprocket wheel,
and pivoted upon the bridge at one end, or or at any desired point thereon, in which
case the cross motion of the crab or truck upon the bridge must then be separately
performed by pushing the load direct or by any of the usual devices for that
purpose, such as a rack and pinion, or single chain or rope, operated by a sprocket
wheel.
Although I have described the driving pulleys E, F, as being operated by sprocket
wheels and endless chains or ropes, they may be driven by toothed gear and winch

page_text: handles, the operator standing upon the platform of the travelling carriage in the
usual manner, or by suitable gearing, and an endless driving cord, receiving power
from a mill shaft, both of which modes of driving are in common use.
Having now described the nature of the said Invention, and in what manner the
same is to be performed, I declare that I claim,-
First. The improved driving gear, of variable speeds, for operating crabs, or hoists,
or other machines or constructions requiring similar motions, substantially as
herein-before described with reference to Figures 1 and 2 of the accompanying
Drawings.
Second. The improved method or means of imparting the travelling and traversing
motions to travelling cranes and other constructions requiring such motions, sub-
stantially as described with reference to Figures 3, 4, 5, 6, 7, 8, and 9 of the
accompanying Drawings.
In witness whereof, I, the said John Clayton Mewburn, have hereunto set
my hand and seal, this Twenty-ninth day of September, One thousand
eight hundred seventy-seven,