IMPROVEMENTS IN MACHINERY FOR RAISING MOVING. AND LOWERING HEAVY BODIES."
Year: 1853

page_text: LETTERS PATENT to Thomas Dunn, of the Windsor Bridge Iron
Works, Pendleton, in the County of Lancaster, Engineer, James
Bowman, of Plaistow, in the County of Essex, Engineer, and
Joseph Dunn, of Bellevue Terrace, in Pendleton aforesaid, Mill-
wright, for the Invention of "IMPROVEMENTS IN MACHINERY FOR
RAISING MOVING. AND LOWERING HEAVY BODIES."
PROVISIONAL SPECIFICATION left by the said Thomas Dunn,
James Bowman, and Joseph Dunn at the Office of the Commis-
sioners of Patents, with their Petition, on the 9th November 1853.
We, THOMAS DUNN, of the Windsor Bridge Iron Works, Pendleton, in
the County of Lancaster, Engineer, JAMES BOWMAN, of Plaistow, in the
County of Essex, Engineer, and JOSEPH DUNN, of Bellevue Terrace, in
Pendleton aforesaid, Millwright, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN MACHINERY FOR RAISING, MOVING,
AND LOWERING HEAVY BODIES," to be as follows:-.
Our improvements have reference, first, to that description of
machinery for raising, moving, and lowering heavy bodies, called a

page_text: travelling crane; in this instance a longitudinal friction drum, ex-
tending the whole length of the crane, is made to revolve by a steam
engine or other first mover, and the motion for traversing the top
carriage and for working the chain or rope barrel is imparted from
the longitudinal drum by a friction pulley, which is brought into con-
tact with the drun, when required, by a spring or set screws or other
suitable mechanism.
Second, our improvements consist in making the beams of travelling
cranes of wrought iron, instead of wood and cast iron as heretofore.
Third, in the application of a screw extending the whole length of
the travelling crane, and in giving the requisite motions to the lower
carriage, the chain barrel, and the top carriage by a worm wheel work-
ing in the said screw, instead of obtaining the said motions by friction,
as herein firstly before referred to.
Fourth, in working travelling cranes by means of an endless chain
which is carried over four pulleys placed at the corners of the platform
of the crane; one of the said pulleys is furnished with cogs, and is
fixed on an upright shaft, to which motion is given by a steam engine
or other motive power. The endless chain is thus made to move round
the pulleys, and the requisite motions for moving the lower carriage,
the chain barrel, and the top carriage are derived from the endless
chain and by cog wheels working into it.
Fifth, in working travelling cranes by means of a steam engine sup-
ported on a platform forming part of the lower carriage, and in giving
the requisite motion to the top carriage and the chain drum by longi-
tudinal screws and worm wheels gearing into the same, or by grooved
shafts and pinions sliding on the same; also in fixing the engine on the
top carriage, instead of on the platform of the lower carriage, as above
mentioned.
Sixth, our improvements are particularly applicable to working by
steam or other power two or more swing cranes placed in the same line
in a machine shop, or for other purposes; in this instance we have a
horizontal shaft extending either over or under all the cranes to be
worked, and a vertical shaft placed within the column of each crane is
worked by the horizontal shaft; this vertical shaft gives motion to the

page_text: traversing truck at the top of the jib and to a set of cone pulleys, a strap
from which gives motion to another set of cone pulleys, to which the
pinion is attached for working the chain or rope barrel; also in dis-
pensing with the cone pulleys and imparting the motion to the chain
or rope barrel by wheels and an upright shaft.
-
Seventh, in a modification of the above-described improvement; in
this instance the vertical shaft gives motion to a horizontal one, on
which is a worm gearing into a worm wheel on the chain barrel.
Eighth, in a crane with a radiating jib or shears, the angle of which
can be varied by a worm or worms supported by the shears gearing into
one or two fixed toothed segments, the centres of which coincide with
the fulcrum of the shears; also in giving motion to the chain barrel by
a steam engine, the piston rod of which gives motion to the crank fixed
to the pinion which works into the wheel on the chain barrel; this
crane may either be fixed or it may be mounted on a truck or lurry
for railway or other purposes.
Ninth, in raising or lowering the jib of a radiating jib crane by means
of right and left handed screws, both of which work in a long nut, one
screw being fast to the crane pillar and the other to the end of the jib;
it is evident that by turning the nut round the jib will be raised or
lowered.
Tenth, in raising or lowering the jib of a radiating jib crane by means
of a screw, one end of which is fixed to the crane pillar and the other
end passing through a boss on the end of the jib; a bevil wheel serves
as nut to the screw, and in turning this bevil wheel round the jib is
raised or lowered.
Eleventh, in fastening the cheeks of a derrick crane to large wheels,
the circumferences of which are furnished with cogs, and in giving
motion to the said wheels by pinions fixed on a cross shaft; by this
means the angle of the cheeks of the derrick can be altered.
Twelfth, in moving the cheeks of derricks by means of worms and
worm wheels, instead of the pinions and cog wheels herein, eleventhly,
before referred to.
Thirteenth, in an improved combination of machinery, consisting of
a frame to be placed under the framing of a locomotive engine or

page_text: other carriage, which frame is acted upon from below by two or more
hydraulic rams or by screws, the object being to raise the locomotive
engine or other carriage off its wheels and axles.
And, lastly, in an improved derrick, the lower end of the back stay
of which is acted upon by a screw and nut for the purpose of varying
the angle of the jib, also in working the chain or cord for raising and
lowering the heavy bodies to be moved, by attaching the end of the
chain or cord to a screw nut acted upon by a screw, the requisite
motion for working the screws and nuts being obtained by hand, steam,
or other power.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Thomas Dunn, James Bowman, and Joseph Dunn
in the Great Seal Patent Office on the 9th May 1854.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we,
THOMAS DUNN, of the Windsor. Bridge Iron Works, Pendleton, in the
County of Lancaster, Engineer, JAMES BOWMAN, of Plaistow, in the
County of Essex, Engineer, and JOSEPH DUNN, of Bellevue Terrace, in
Pendleton aforesaid, Millwright, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Ninth day of November, in the year
of our Lord One thousand eight hundred and fifty-three, in the seven-
teenth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto us, the said Thomas Dunn, James Bowman, and
Joseph Dunn, Her special license that we, the said Thomas Dunn,
James Bowman, and Joseph Dunn, our executors, administrators, and
assigns, or such others as we, the said Thomas Dunn, James Bowman,
and Joseph Dunn, our executors, administrators, and assigns, should at
any time agree with, and no others, from time to time and at all times
thereafter during the term therein expressed, should and lawfully might
make, use, exercise, and vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an In-
vention for "IMPROVEMENTS IN MACHINERY FOR RAISING, MOVING, AND

page_text: LOWERING HEAVY BODIES," upon the condition (amongst others) that we,
the said Thomas Dunn, James Bowman, and Joseph Dunn, by an
instrument in writing under our hands and seals, or under the hand.
and seal of either of us, should particularly describe and ascertain the
nature of the said Invention, and in what manner the same was to be
performed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the date
of the said Letters Patent.
NOW KNOW YE, that we, the said Thomas Dunn, James Bowman,
and Joseph Dunn, do hereby declare the nature of our said Invention,
and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement, that is
to say:
The nature of our Invention, and the manner in which the same is to
be performed, are fully described and ascertained in and by the follow-
ing description, reference being had to the accompanying Drawings
and to the figures and letters marked thereon; the same letters of
reference are marked upon corresponding parts throughout.
DESCRIPTION OF THE DRAWINGS.
Fig. 1, is an clevation in section.of one end of a machine for raising,
moving, and lowering heavy bodies, commonly called a travelling crane,
to which the first part of our Invention is applied. Figure 2, is a plan
of Figure 1. Figure 3, is a transverse section of one of the side beams
of the said travelling crane, drawn on an enlarged scale. The nature of
this part of our Invention consists in communicating motion to the
various parts of the crane by a friction roller, and the combination
of machinery connected therewith. In Figures 1 and 2, a is a friction
roller extending the whole length of the longitudinal runners of the
crane; this friction roller is made of cast iron in suitable lengths, which.
are coupled together and supported at intervals, as shewn in the Draw-
ing; motion is communicated to this friction roller by a steam engine
or other power. c, is a friction pulley fixed on the shaft c', supported in
bearings in the arms c, which are pressed down so as to keep the
pulley c, and roller a, in contact by the springs c³, shewn in Figure 1.

page_text: The roller a, instead of being directly under the centre of the pulley c
may, if preferred, be placed to one side, as shewn by the dotted circle a',
and in some cases the arms may be dispensed with, and the bearings
of the shafts c' may be fitted in the beams d of the lower carriage, as
shewn in Figures 4 and 5 ; in the former of these views the bearings are
acted upon by set screws c¹ to keep the pulley c in contact with the
roller a, and in the latter the springs c' answer the same purpose. The
roller a, instead of having a plain surface, may be toothed or fluted, and
the pulley c made to work in such teeth or flutes. The lower carriage
is moved along the runners b, by the wheel c, fixed on shaft c'; this
wheel
gears into the wheel e, fixed on a cross shaft e'; this wheel gives
motion to the wheel i, on the shaft i, to which is fixed a pinion
gearing into the wheel e, fixed on the boss of a mitre pinion e, which
gears into two similar pinions loose on the shaft f, but connected to it
when required by a double clutch box f'; at each end of the shaft f
is fixed a spur pinion f, only one of which is shewn in Figure 2; this
pinion gears into the wheel g, fixed on the shaft of one of the wheels
g', by this means the lower carriage is moved in either direction or re-
mains stationary, as in traversing cranes of the usual construction. The
requisite motion is given 'to the chain drum & by the pinions and e
which are both loose on the shaft e¹, but connected to it when required
by the double clutch box e'; both the pinions e³ and e' gear into a
similar pinion fast to the diagonal shaft h', near the lower end of which
is a worm h², gearing into the worm wheel h³, fixed to the shaft of the
chain drum h. The requisite motion is given to the top carriage to
which the block is attached in the usual manner, and which is not
shewn in the Drawing as it forms no part of our Invention. By the mitre
inions and i, both of which are loose on the shaft ', these pinions
gear into a similar pinion fixed to the cross shaft j, on which is a worm
gearing into a worm wheel fixed to one of the wheel shafts of the top
carriage. I prefer to make the beams d of strong plate iron, rivetted to-
gether at intervals, and strengthened above and below by two angle irons,
as shewn in Figure 3; to the upper angle irons is rivetted a bridge rail
for the top carriage to run upon, and to the lower angle irons is rivetted
another plate to give additional strength to the lower part of the beam.

page_text: These beams are particularly applicable in workshops or other places
where great strength is required in comparatively small compass.
Figure 6 represents one end of a travelling crane to which the
second part of our improvements is applied; Figure 7, is an end
view; and Figure 8, a plan of the same. The nature of this part of
our Invention consists in the application of a screw, to be used in
place of the friction roller marked a, in Figures 1 and 2, and in the
application of screws for traversing the top carriage and for moving
the chain barrel. In Figures 6, 7, and 8, K is the screw, extending
the whole length of the longitudinal runners b, to which are fixed the
bearings K', in which the screw K works; these bearings are about
8 inches in length, or more or less, according to the size of the screw,
and they are open at the top, as shewn in Figure 6, to allow the
worm wheel K² to traverse from one end of the crane to the other.
Rotary motion is given to the screw K, by steam or other power, in any
convenient manner. The worm wheel K is fixed on the shaft K³, sup-
ported in bearings in the frame 1, forming the end of the lower car-
riage; to the shaft K³ is fixed the wheel K+, gearing into the wheel m,
fixed on the shaft m'. On this shaft is also fixed a bevil wheel m*,
which transmits the requisite motions for moving the lower carriage on
the longitudinal runners for moving the top carriage along the lower
carriage, and for working the chain drum in the following manner :-
The wheel m gears into the wheel n, fixed to the shaft n', the bevil
wheels and n³, and clutch box n', transmit the motion from the
shaft n' to the shaft o, a pinion on which gears into the wheel g, fixed
on the shaft of one of the wheels g', supporting the lower carriage. The
bevil wheels n and n", and double clutch box n', transmit the motion
from the shaft n¹ to the top carriage by means of the wheel p, fast; on
the screw pl; one end of this screw is supported in a bearing fixed
to the frame 1, and the other end is supported in a similar bearing
fixed to the other end of the lower carriage, which is not shewn in the
Drawing; there are also intermediate bearings, similar to K', fixed to the
beams d, at suitable intervals; the screw p¹ gears into the worm wheel
2, fixed on one of the shafts of the top carriage. The bevil wheels 22
and n³, and double clutch box 220, transmit the motion from the shaft n'

page_text: to the chain barrel h, by the wheel q, fixed on the screw q', which is
also supported in bearings at each end of the lower carriage and by
intermediate bearings. The screw q' gears into the worm wheel q
fixed to the shaft of the barrel h. The double clutch boxes n', n, and
n, are worked by levers and handles, shewn in Figure 8, so that the
attendant when standing on the platform can stop, start, or reverse the
direction of motion in any part of the crane.
On Sheet 2, Figure 9 is an elevation of part of a travelling crane, to
which the third part of our improvements is applied. Figure 10 is a
plan of one end of the same. The nature of this part of our Invention
consists in transmitting the various motions required in the crane by
means of an endless chain passing over pulleys placed at each corner of
the crane. In Figures 9 and 10, is the endless chain, which is repre-
sented by a dotted line; ", are the pulleys around which it is carried.
One of these pulleys is fixed to an upright shaft, which is driven by
steam or other power; the chain passes over the guide pulley 73, which
is fixed on a shaft supported in bearings in the frame 1, forming one end
of the lower carriage; the chain then passes under the pulley, which
is made with cogs and fixed on the shaft 5, to which it gives motion,
and then over the guide pulley 7. To the shaft is fixed the bevil
wheel m²; this bevil wheel gives motion to the shaft n', and through it
to the various parts of the crane, in the same manner as has been
described in reference to Figures 6, 7, and 8. In Figure 11, we have
shewn a modification of this part of our improvements. In this case,
instead of carrying the chain round four horizontal pulleys r, as
above described, we propose to use only two vertical pulleys 7, one
being situate at each end of the longitudinal runners b; the chain
communicates the requisite motion to the pulley, as above described,
and motion is given to the chain by the upright shaft and bevil
wheels 27.
Figures 12 and 13 represent in elevation and plan a common swing
crane, to which the fourth of our improvements is applied. The
nature of this part of our Invention consists in working two or more
swing cranes by steam or other power, which is communicated by
a horizontal shaft extending over or under the cranes to be worked;

page_text: also in giving a greater or less velocity to the chain or rope barrel
by speed pulleys. In Figure 12, s is a horizontal shaft placed below
the floor of the cranes; on this shaft are fixed as many bevil wheels s'
as there are cranes to be worked, each wheel or pinion s¹ gears into
a pinion s, fixed on an upright shaft, within the column of the
crane; to the upper end of the shaft is fixed a mitre pinion st,
gearing into two similar pinions on the horizontal shaft t, which are
loose on the shaft, but connected to it, when required, by the double
clutch box t. To the shaft t is fixed a set of speed pulleys t2, a strap
from which gives motion to a corresponding set of pulleys t3 on the
shaft t; on this shaft is a spur pinion giving motion to the chain or
cord barrel h in the usual manner. The handle t, and lever to, fixed
on the upright shaft t', are to throw the double clutch box in gear
with either of the mitre pinions on the shaft t, when required; by this
arrangement several cranes can be worked by the same main driving
shaft, and the speed of the chain or cord 10 can be varied without
throwing any of the driving wheels in or out of gear, as in cranes of
the ordinary construction. The other parts of the crane are not new.
On Sheet 3 we have shewn one mode of constructing the fifth of
our improvements. The nature of this part of our Invention consists
in erecting a portable steam engine and boiler on the lower or upper
carriage of a travelling crane, and in giving the requisite motions to the
various parts of the crane by the said portable steam engine. Figure
14, is an elevation of one end of the travelling crane; Figure 15, a
plan of the same; and Figure 16, is an end view of the top carriage.
In this instance we place two portable steam engines, marked u, on the
platform u', which forms part of the lower carriage; this platform may
be roofed over, as shewn in Figure 14, to protect the machinery and the
workmen; u is the boiler, and u³ the chimney. The engines u are
coupled to the shaft u', on which is keyed a pinion u, driving the wheel
u, fixed to the shaft w. This shaft gives motion to the cross shaft.
10, and by it to the lower carriage, in the following manner :-The shaft
10 is driven by the bevil wheels on the shaft u, shewn in Figure 15;
the pinion , fast on the shaft 10, gears in the wheel u, to which is
fixed the pinion us, gearing into the wheel g, which, as before described,

page_text: is fixed to the carriage wheel g'. The motion is given to the top carriage
by the chain 7, passing over a pulley with cogs in it, fixed on the shaft u³,
which is driven by bevil wheels from the shaft u, as clearly shewn in
Figure 15; the chain drives the pulley, which is also furnished
with cogs fixed on the same shaft as the pinion gearing into the
wheel, fixed to the shaft of the top carriage. The motion is given
to the drum or barrel h, by the chain 18, passing over a pulley with
cogs on the shaft u³, which is driven from the shaft u by bevil wheels,
as shewn in Figure 15; the chain 18 gives motion to the pulley with
cogs fixed on the same shaft as the bevil wheel ", which drives a
pinion on the worm shaft 3, which gears into the worm wheel q²
fixed to the barrel h. We wish to remark that, instead of the chains
and above described, we also intend to use screws, as shewn
in Figures 6, 7, and 8, or common grooved shafts and pinions, for
giving the requisite motions to the top carriage and to the chain
barrel.
Figure 17 represents a mode of constructing the sixth of our improve-
ments. The nature of this part of our Invention consists in the combi-
nation of the improved mode of driving two or more cranes, described
in reference to Figures 12 and 13, and driving the chain barrel by a
worm and worm wheel. The shaft t, by means of a pinion and wheel,
gives motion to another shaft, on which is fixed the worm t³, gearing
into the worm wheel to, fast to the shaft of the barrel h. The other
parts of this crane are clearly shewn in the Drawing, and most of them
are before described in reference to Figures 12 and 13. On Sheet 4,
Figure 18 represents a modification of the crane shewn in Figure 17;
this modification consists in giving motion to the chain barrel by spur
gearing, instead of by the worm t, above referred to. In this instance
the shaft t has a mitre pinion to fixed to it, which gears into the
pinion v, on the shaft v'; this shaft is furnished with two spur wheels v²
and v', which are capable of being moved laterally, so as to bring either
of them in gear when required. When a quick speed is required for
the barrel h, the wheel 3 is brought into gear with the wheel v³, and
when a slow speed is required the wheel v² is brought into gear with
the wheel v; v, is a friction break of the usual construction.

page_text: Figures 19 and 20 represent two views of a radiating jib crane,
showing the seventh of our improvements. The nature of this part of
our Invention consists in varying the angle of the jib by worms or
pinions gearing into fixed toothed segments, the centres of which coin-
cide with the fulcrum of the jib. In these views w is the jib which
hinges on the fulcrum shaft w; w² are two worms supported in frames
attached to the jib; these worms gear into the toothed segments w²,
which are fixed to the framework of the crane; h, is the chain barrel,
to which motion is given by the little steam engine w³, or by other
power. The motion for working the worms w¹, and for varying the
angle of the jibs, is transmitted from the steam engine w³ by the bevel
wheels shewn in the Drawing, and by the radiating shaft w. The
worms w may also be moved by hand by disconnecting a pair of the
bevel wheels, and by turning the hand wheel w. The other parts of
the crane are clearly shewn in the Drawing. This crane may be
conveniently mounted on a truck for railway or other
Figure 21 represents a radiating swivel crane, to which our eighth
improvement is applied. The nature of this part of our Invention con-
sists in the application of one or two screws acting on the end of the jib
to alter its angle. In this view is a left-handed screw connected to
the end of the jib; a is a right-handed screw connected to the lower
part of the column; a is a long nut in which both the screws enter;
and a is a hand wheel fixed to the nut. It is evident that by turning
the wheel a the screws are shortened or lengthened, and consequently
the angle of the jib varied in proportion. The gearing for giving
motion to the chain barrel his shewn in the Drawing, and does not
require any description.
purposes.
Figure 22 represents another radiating swivel crane, to which the
ninth of our improvements is applied. The nature of this part of our
Invention consists in varying the angle of the jib by a screw, the nut of
which is turned from the centre of the crane. In this view y is a screw
hinged to the lower end of the centre column; y' is a bevel pinion sup-
ported in a swivel bearing attached to the jib. This pinion serves as a
nut for the screw y, and it is turned round when the angle of the jib
requires altering by the cord y', which gives motion to the wheel y', to

page_text: which is fixed a bevel pinion gearing into another pinion fast to the
upper end of the shaft y', to the lower end of which is fixed the pinion
y gearing in y, above described. By this means more power can be
exerted for raising or lowering the jib than by the machinery shewn in
Figure 21.
Figure 23 represents a derrick crane, constructed according to the
tenth of our improvements. The nature of this part of our Invention
consists in fastening the cheeks of a derrick crane to large toothed
wheels, and in giving motion to the said toothed wheels by pinions.
A, represents the front check of a derrick; this cheek is bolted to the
spur wheel B, which is keyed on the shaft B'; another similar wheel, to
which the other check of the derrick is bolted, is also keyed on the
shaft B', but it cannot be seen in the Drawing. The wheels B are
geared into by pinions B fixed on the shaft C, to which is fixed a
wheel C', driven by the pinion D, to which motion is given by hand
or other power. The barrel for the chain or cord is driven by the
pinion D¹, gearing in the wheel C, fixed to the barrel h, and loose on
the shaft C, and the chain or cord is carried over the pulley A¹ in
the usual manner. By this arrangement the angle of the derrick
checks can be varied with great facility.
Figure 24 represents another derrick crane, constructed according
to the eleventh of our improvements. The nature of this part of our
Invention consists in the substitution of worms and worm wheels for
the wheels B, and pinions B2, herein above referred to. In Figure 24
the derrick cheeks A are bolted to worm wheels E, into which gear the
worms F; these worms are driven by the mitre pinions F¹ and cross
shaft G, to which motion is communicated by steam or other power.
Figure 25 is a side elevation of a machine for raising locomotive
engines or other carriages, constructed according to the twelfth of our
improvements; Figure 26 is a plan of the same. The nature of this
part of our Invention consists in an improved combination of machinery
for raising locomotive engines or other heavy carriages from below.
H, is the side frame of a locomotive engine. The other parts of the
engine are not shewn in the Drawing, as they are not required to
illustrate these improvements. I, I, are two strong wood or iron beams;

page_text: and I, I, are two cross beams; the beams I, I, are acted upon from
below by four hydraulic rams J; these rams are raised by the pump K,
and branch pipes L, in the ordinary manner of working hydraulic
presses. When an engine or carriage is to be raised off its wheels it is
brought on the rails M between the side beams I; the cross beams I¹
are then laid across the beams I; and the rams J, which were then
down, are gently raised by working the pump K; by this means the
frame I raises the engine or carriage off its wheels. A stop-cock is
applied to each pipe L, by opening or closing which one end of the
frame can be raised more than the other. It may in some cases be
sufficient to place one hydraulic ram at each end of the frame I, or
screws may be substituted for the rams J.
We will now proceed to describe the thirteenth part of our Inven-
tion, which consists in an improved mode of constructing derricks;
the mode of performing this will be clearly understood without Draw-
ings. To the lower end of the back stay of this improved derrick is
hinged a swivel nut fitting on a screw supported in fixed bearings,
consequently when this screw is turned round the position of the nut is
altered, and the jib of the derrick is either raised or lowered, according
to the direction in which the screw is turned.
Our last improvement in machinery for raising, moving, and lowering
heavy bodies consists in attaching the end of the chain or cord to which
such heavy bodies are suspended to a screw nut, instead of attaching
the same to a barrel or drum, as is now customary. This screw nut fits
on a screw to which motion is given by steam or other power; it is
evident that by turning the screw in one direction the heavy body
attached to the chain or cord is raised, and when the screw is turned
in the contrary direction the body is lowered; this combination of parts
would be particularly applicable where great weights have to be moved
through short distances.
Having now described the nature and particulars of our Invention,
we wish it to be understood that we do not limit ourselves to the details
herein set forth, so long as the peculiar character of the Invention, or
any part thereof, be retained; but what we do claim is,-
Firstly, communicating motion to the various parts of a travelling

page_text: crane by means of the friction roller a, and parts acting in combi-
nation therewith, as shewn and described in reference to Figures 1, 2,
4, and 5.
Secondly, in the application of screws for imparting the requisite
motions to travelling cranes, as shewn and described in reference to
Figures 6, 7, and 8.
Thirdly, the application of endless chains for transmitting the requi-
site motions to travelling cranes, as herein-before shewn and described
in Figures 9, 10, 11, 14, 15, and 16.
Fourthly, working two or more cranes by steam or other power, and
communicating motion to them by a horizontal shaft, as shewn, and as
described in reference to Figures 12, 13, 17, and 18.
Fifthly, the application of speed pulleys to cranes for producing
different speeds in the chain barrel, as shewn and described in reference
to Figures 12 and 13.
Sixthly, the application of a portable steam engine and boiler on the
upper or lower carriage of travelling cranes, as shewn and described in
reference to Figures 14, 15, and 16.
Seventhly, the combinations of machinery shewn and described in
reference to Figures 17 and 18, for working several cranes by power,
and for working the chain barrel.
Eighthly, the improved combination of machinery for varying the
angle of the jib or shcars, shewn in Figures 19 and 20.
Ninthly, the application of a screw or screws for varying the angle
of the jib of swivel cranes, as shewn and described in reference to
Figures 21 and 22.
Tenthly, the improved derrick crane, shewn and described in refe-
rence to Figures 23 and 24, in which the derrick cheeks are attached
to toothed wheels or segments.
Eleventhly, the improved combination of machinery for raising loco-
motive engines or other carriages from below, as shewn and as described
in reference to Figures 25 and 26.
Twelfthly, varying the angle of derricks by means of a screw acting
on the back stay of the same, as described.
And, lastly, connecting the chain or cord of a crane or derrick to a

page_text: crew nut, and in raising or lowering the said chain or cord by means
f a screw acting on the said screw nut, as described.
In witness whereof, we, the said Thomas Dunn, James Bowman,
and Joseph Dunn, have hereunto set our hands and seals, this
Eighth day of May, One thousand eight hundred and fifty-four.
igned, sealed, and delivered by the
within-named Thomas Dunn,
James Bowman, & Joseph Dunn
in the presence of
H. B. BARLOW,
JAMES BOWMAN. (L.S.)
JOSEPH DUNN.
Patent Agent,
Manchester.
(L.S.)