IMPROVEMENTS IN COAL IRON ORE AND MERCHANDISE DERRICKS
Year: 1883

page_text: LETTERS PATENT to Arthur Lewsley of N° 10 Kings Bench Walk Temple in
the City of London Gentleman for an Invention of IMPROVEMENTS IN COAL
IRON ORE AND MERCHANDISE DERRICKS communicated to him from Abroad
by William Edgar Ludlow of the town of Sandusky in the County of Erie in
the State of Ohio one of the United States of America.
PROVISIONAL SPECIFICATION left by the said Arthur Lewsley at the Office
of the Commissioners of Patents on the 21st May 1883.
ARTHUR LEWSLEY of [N°] 10 Kings Bench Walk Temple, in the City of London,
England, IMPROVEMENTS IN COAL IRON ORE AND MERCHANDISE DERRICKS
[communicated to him from Abroad by William Edgar Ludlow of the town of
Sandusky in the County of Erie in the State of Ohio one of the United States of
America.]
The object and nature of this invention will more fully appear from the
subjoined description and accompanying drawings in which:
Fig 1. represents a perspective view of this improved Derrick denuded of some
of its parts and not mounted on a truck.
Fig 2. is a rear elevation showing the platform for the operator provided with a
housing.
Fig. 3. A plan of the boom looking from the underside.
Figs 4 & 5 is a perspective view of the catch ready to receive the latch of the
carrier and showing part of the boom in dotted lines, and also (for Fig 5) the catch
bar is shown dropped to allow the carrier to pass (see C³, G', G²)
Fig. 6. is a side elevation of the carrier attached to part of the boom and showing
the parts ready to receive the shank of the carrying pulley.
Fig. 7. is a similar view of the carrier showing the shank of the carrying pulley
caught upon the hook of the carrier, the carrier is also provided with a double set
of latches and stops.
Fig. 8. is a perspective view showing the double set of latches and stops in
detail.
Fig. 9. is an end elevation of a supporting rod attached to the hook of the
carrying pulley
Fig. 10. is a side elevation of the same

page_text: Fig. 11. is a side elevation of an eccentric bearing and Fig. 12. a section through
the line shaft and its pulleys.
Referring particularly to the several parts of the drawing:-
A represents the frame work of the derrick and consists of bases A', A³,
uprights A masts A' bridges A³ and braces Aº.
The bases A1, A2, may be provided with wheels a which rest upon a track D so
that the frame may be moved to any desired point, and their ends are provided
with clamps D¹, for holding the derrick at any given point upon said track which
is attached to a wharf or other surface where the derrick may be used.
Between and near the top of the uprights A³, is a roller a³, having its ends
journalled in said uprights. Between the masts A' and at the same height as
roller a³, is a similar roller a, journalled in said masts. Resting upon these
rollers (a³ and a*) is a boom B, consisting of two beams B¹, B₁ and pieces B3 & B4,
cross-pieces B, and runways B. Upon the crosspieces B5, is a longitudinal strip
having a rack bar B', the teeth of which are in contact with a pinion a', journalled
in blocks a², held in place by the upper side of the bridge and the brace. The
object of this construction is to move the boom upon its rollers so that its front
end can be projected to any desired distance beyond the front of the frame or be
drawn within said frame when it has been projected too far. At the front end B³
of the beam is a catch b, upon the underside, eyes 61. upon the upper side, and
rollers 62, upon the front end, attached to the eyes b¹ are stay-ropes 63, which pass
upwardly to and over pulleys 6 and downwardly inside the frame to windlasses b³,
which are used to draw the stay ropes tight when the boom has been adjusted.
Attached at suitable points, upon the boom are the catches C, which are formed
of two clips C1, C2, and a catch_bar C³. The clips C¹, C are each provided with a
top c, side c' bottom c² and a lip c¹. These clips embrace the frame beams A¹ A¹
of the boom A with open side facing each other and may be moved to any point
upon the beam without detachment. When a point for setting has been fixed
upon they can be firmly attached to the beams by screws c³. Upon clip C¹ are
outwardly and downwardly projecting ears c, through which a pintle passes for
the catch bar C³ to move upon. One of the ears is provided with an extension c
having an opening for a rod G to pass through. The catch bar C³ is of sufficient
thickness to receive the impact of the rod for operating the hook of the carrier and
is pivoted near one of its ends to the ears c, of clip C¹ and its short end c¹ serves
as a stop when the bar is dropped. When said catch bar is placed across the space
between the beams it rests against the underside of the clips between lugs c³ & c³
which prevent lateral displacement when operated upon by the carrier. Extending
from end to end of the frame work and parallel with the boom is a rod G journalled
at each end to permit of its being rocked. One end of the rod extends a short
distance outside the frame work and is provided with a crank arm G₁ to the free
end of which is attached the upper end of a connecting rod G₁. The lower end of
this rod is attached to one end of a lever G³ fulcrumed upon the platform where
the operator stands to operate the raising and lowering mechanism of the machine.
Upon the rod G is a dog g, which may be fixed to the rod by a set screw g.. The
free end of this dog is in contact with the stop end of catch-bar G and when the
rod G is rocked one way forces the catch bar to the position shown in Fig. 2. and
when rocked in the opposite direction releases the catchbar which drops to the
position shown in Fig. 5.
:
"
It is obvious that two or more dogs can be placed upon the rod and two or more
catches at different points on the boom so that the load can be released at corre-
sponding points below said boom..
:
Stretching from end to end of the boom and between the beams B' and attached
to end pieces. B³ & B are the runways Be upon which a Carrier E moves by means
of wheels 1. This carrier is drawn to the end B³ of the boom by a counterweight I,
attached to the outer end of the carrier by a cord i which passes over pulley or
roller 62 on end B3 of the boom and over pulley 3 on to the upper of land to one
side of the masts A and is drawn from the endoB by means of a lifting cable E

page_text: which extends the whole length of the beam, and passes over a roller E, placed}
between the uprights As down to a drum or spool F keyed to friction pulley F¹ at,
the base of the unloader.
* f
The drum and pulley are keyed to a common shaft which is journalled in
eccentric bearings fon posts F2. These posts F2 are attached by their lower ends
to the base piece A' and by their upper ends to a brake-block M attached to,
posts A³. Rigidly attached to the spool and pulley shaft and near the pulley is a.
crank arm H, the pin of which is attached to a rod,J. provided with a lever J' at.
its upper end which is within a watch-box K, so that an operator stationed in the
latter can force friction pulley F₁ against brake-block M or allow it to fall upon,
friction pulley L. This shaft extends from one end of the wharf to the other and
is revolved by an engine placed at one end thereof and is adapted to give notion
to one or more, derricks and to allow the latter to be moved to any point thereon..
To accomplish this a longitudinal keyway is formed in the surface of the shaft in.,
which a feather fastened to the friction roller L' slides thereby imparting the
motion of the shaft to and allowing free motion of the roller lengthwise on the
shaft. It is obvious that the counterbalance can be dispensed with and the cord or.
cable which is attached to the forward end of the carrier extended to a drum which,
is operated by substantially the same means used to operate the lifting, cable
drum as it may often be desirable to carry loads from the place where the derrick,
is stationed to a point outside the frame-work or from different points beneath the
bridge as will hereinafter be described. +
To ensure friction roller. L³, moving with the derrick and always being under,
friction-roller F, two arms V, V, attached to the framework one, on each side of
the friction-roller L', are provided, so that no matter which way the derrick moves.
the arms will push the roller L' that way, and always keep it under roller, F., The
carrier E consists of a frame work P suspended from the axles of wheels e e and
has a sheave P¹, journalled at the inner end of the framework, and a hook Pa
forming part of the frame... The lifting-cable E is attached to hook P2 and passes.
over sheave Pl. Suspended upon cable E between the hook and sheave is a pulley
Pa having a shank P4 which passes up into the frame work through an opening O
having inclined plates or guides o for the shank. Above this opening is a hook R
which catches in the eye of shank P* as shown in Fig. 6. and holds pulley P³ while
a load is being transferred. This hook'R is attached to a shaft r journalled in the
framework and which has a crank arm Routside the framework. Attached to the
pin of this crank arm is a rod R2 which extends forward outside the framework,
and is attached thereto by a strap r' upon the outer end of a rod R2 between
collar and the-front edge of the framework is a spring r³ coiled around the rod.,
The object of this spring is to: force the rod outward so that when in position,
shown in Fig. 6. it will draw hook R immediately over opening O and into the eye.
of shank P. Pivoted to the framework at s is a lever latch S.which whenever
spring 8, presses the inner end down catches upon catch b as shown in Fig. 7.)
The inner end of the lever latch is over opening O so that when shank P* passes
into and through the latter it will elevate the inner and the outer depress of lever
latch S and thus detach it from latch b. If desired, the carrier may be provided
with a latch at each end so that it will not be necessary to drop the latch except,
when it is necessary to pass one of the latches. By using two or more, latches coal,
iron ore or other substances, may be moved from one receptacle to another placed,
within the frame of the derrick by operating said catches in an obvious manner. A
carrier having the additional latch and stop in dotted lines is shown in Fig. 6, and
a skeleton of the operating parts of such a carrier is shown in Fig. 8. As it is
intended to have the boom of the derrick about forty feet from the ground it will
often be found advantageous to have an adjustable rod to suspend the load from
the pulley P³ of the carriers As it will reduce the distance for the load to travel.
This is peculiarly advantageous in moving merchandise from one part of the wharf
to the other or for taking loads from large vessels. To accomplish this I provide
two rods N, N¹, each having a sleeve n which embraces the body of the other and

page_text: the upper end N¹ provided with an eye n². The lower rod N is provided with a
chain or other flexible substance so, that the hook n³ may be slipped under the
handle of a bucket or in the eye of a sling for merchandise. After the rods have
been adjusted they may be fixed in place by set screws n₁. The operation is as
follows: The derrick is moved upon the track to any desired point and then clamped
to said track. The boom is now adjusted and fixed in position by means of ropes or
guys or stay ropes 63 and windlasses 65. The operator stationed in watchbox K
suspends pulley Ft between friction pulley L' and brake-block M by means of lever H
and J and rod J, so that counterbalance I attached by a cord to the forward end of
carrier E will draw the latter upon the runways to the outer end of the boom.
Lifting cable E' is paid out as the carrier approaches the outer end of the boom
and is kept tense by the counterbalance which prevents any unnecessary jar when
the pulley is unhooked and lowered. The speed with which the carrier travels
can be regulated by breaking the friction, pulley F' against brake block M. The
several parts of the carrier when moved upon- the runways are in the position
shown upon Fig. 6 and when the carrier reaches the outer end of the boom, the
end of rod R² strikes against the end piece B³, turns shaft r by means of a
crank arm R' and detaches hook R from shank P on pulley P³, leaving the latter
in position to descend. Cable E¹ is now slackened so that pulley P³ will run
As shank P* leaves the
down on the cable to a point where the load is attached.
carrier the upward, pressure upon the inner end of lever latch S is removed and
spring forces it down so that the hooked end of the outer arm will catch upon
catch band hold the carrier as shown in Fig. 7. After the load has been attached
to hook P³ on pulley Ps, friction wheel F' is lowered upon pulley L' fixed upon
revolving shaft L, and held there by means of lever H J¹ and rod J. The motion
of friction pulley L is imparted to friction pulley F and spool F which winds up
lifting cable G, and draws pulley P³ to the carrier. Shank P' on pulley P³ passes
between the guide plates o through opening O strikes the inner end of lever latch S
detaches its hooked end from catch and the cable which is still being wound
around spool F starts the carrier moving on the runway towards the catch C.
This movement releases the end of rod R2 from the loom and spring r², forces
it outwardly drawing with it by means of crank R¹ and shaft r the hook R which
catches in the eye of shank.P.
The carrier moves along the runway until it passes the point where the catch C
having its latch bar in the position shown in Fig. 5 is fixed. The operator then
presses upon the outer end of lever E³ which elevates connecting rod E³, and rocks
rod E by means of crank arm E. The rod in rocking turns dog e and presses its
outer end against the stop end of the catch bar which is lifted to the position
shown in Fig. 4. The carrier is now drawn back until the latch S catches upon
the catch bar C³, one side of which is bevelled to permit the latch to pass readily
to the side it catches upon at the same time that the latch engages with the catch
the rod which operates the hook strikes the latch bar and forces the hook out of the
eye of the shank in the pulley frame from which the bucket is suspended and
the pulley descends by means of the lift rope from the carrier to the receptacle
and the load released. The pulley is now elevated by the lift rope and the shank
of the pulley enters the opening in the carrier is caught by the hook and forces
the outer end of the lever latch downward to release it from the catch so that the
catch bar C³, can drop and the carrier have free passage to the outer end of the
boom where it releases the pulley which descends for another load.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent and of
an Order of the Lord Chancellor filed by the said Arthur Lewsley in the
Great Seal Patent Office on the 30th November 1883.
ARTHUR LEWSLEY of N° 10 Kings Bench Walk Temple in the City of London
England Gentleman IMPROVEMENTS IN COAL IRON ORE AND MERCHANDISE
DERRICKS, a Communication to me from abroad by William Edgar Ludlow, of
the town of Sandusky, in the County of Erie, in the State of Ohio, one of the
United States of America, manufacturer,
This invention relates to Coal Iron Ore and Merchandise Derricks
The object and nature of the invention will more fully appear from the subjoined
description and the accompanying drawings in which: Fig. 1 represents a perspec-
tive view of this improved derrick denuded of some of the parts and not mounted
on a track. Fig. 2. a rear elevation showing the platform for the operator provided
with a housing Fig. 3 a plan of the boom looking from the underside. Fig. 4. a
perspective of the catch ready to receive the latch of the carrier and showing part
of-the boom in dotted lines. Fig. 5. a similar perspective of the catch showing
the catch-bar dropped to allow the carrier to pass. Fig. 6. a side elevation of the
carrier attached to parts of the boom and showing the parts ready to receive the
shank of the carrying pulleys. Fig. 7. a similar view of the carrier showing
the shank of the carrying pulley caught upon the hook of the carrier; the carrier.
is also provided with a double set of catches and stops. Fig. 8. a perspective view.
showing the double set of latches and stops in detail. Fig. 9. an end elevation of
a supporting-rod attached to the hook of the carrying pulley. Fig. 10. a side
elevation of the same Figs 11 & 12, details. Fig. 13 a bottom plan view of part
of the boom showing an automatic catch. Fig. 14. a vertical section through the
boom. Fig. 15. a view of the catch. Figs 16 & 17. stop rods.
Referring particularly to the several parts of the drawing: A represents the
framework of the derrick and consists of bases A¹, A³, uprights A³, masts, A*,
bridge A and bases AⓇ.
The bases A' A' may be provided with wheels a, which rest upon a track D, so
that the frame may be moved to any desired point and their ends are provided
with clamps D¹ for holding the derrick at any given point upon said track which
is attached to a wharf or other surface where the derrick may be used. Between
and near the top of the uprights A³ is a roller a³, having its ends journalled in
said uprights. Between the masts A* and at the same height as roller a³ is a
similar roller a, journalled in said masts. Resting upon these rollers [a³ and a*]
is a boom B, consisting of two beams B¹ B¹, and pieces B3, B4, cross-pieces B³ and
runways B. Upon the cross-pieces B' is a longitudinal strip having a rack-bar B',
the teeth of which are in contact with a pinion a¹ journalled in blocks as held in
place by the upper side of the bridge and the brace. The object of this
construction is to move the boom upon its rollers so that its front end can be
projected to any desired distance beyond the front of the frame or be drawn
within said frame when it has been projected too far At the front end B³, of the
beam is a catch b, upon the underside for the latch S, and a roller b* upon the
front end. Attached to the eyes 61, are stay ropes 63, which pass up to roller b*,
and windlasses 65, which draw the stay ropes tight when the boom has been
adjusted. Attached upon the boom are catches C, formed of two clips C', C, and
a catch-bar C. The clips C, C, are each provided with a top c, side c¹, bottom c
and lip c. These clips embrace the frame-beams B', B¹, of the boom B and may
be moved to any point upon the beam without detachment and can be firmly

page_text: '
attached to the beams by screws c³. Upon clip C₁ are ears c³, through which a
pintle passes for the catch-bar C³ to move upon. One of the ears is provided
with an extension c, having an opening for a rod G to pass through. The catch-
bar C³ is of sufficient thickness to receive the impact of the rod for operating the
hook of the carrier and is pivoted near one of its ends to the ears c³, of clip.C¹,
and its short end C4 serves as a stop when the bar is dropped. When said
catch-bar is placed across the space, between the beams it rests against the
underside of the clips, between lugs c and c³, which prevents lateral displacement
when operated upon by the carrier. Extending from end to end of the framework
and parallel with the boom is a rod G, journalled at each end to permit of its
being rocked. One end of the rod is provided with a crank arm ¹, to which is
•
attached a connecting rod G. The lower end of this rod is attached to a lever G³,
fulcrumed upon the platform where the operator stands. Upon the rod G, is a
dog g, which may be fixed to the rod by a set screw g¹. The free end of this dog
is in contact with the stop end of the catch-bar C³, and when the rod G is rocked
one way forces the catch-bar to the position shown in Fig. 4, and when rocked in
the opposite direction releases the catch-bar which drops to the position shown in
Fig 5. It is obvious that two or more dogs can be placed upon the rod and two
or more catches at different points on the boom so that the load can be released at
corresponding points below said boom. Stretching from end to end of the boom.”
are runways B, upon which a carrier E moves, by means, of wheels: e. This
carrier is drawn to the end BS of the boom by a counterweight I, attached to the
outer end of the carrier by a cord i, which passes over pulley or roller 68, and is
drawn from the end B3, by a lifting cable, E!, which passes over a roller E³, placed
between the uprights A³, to a drum or spool F, keyed to friction roller F, at the
base of the unloader. The drum and pulley are keyed to a common shaft,
journalled in eccentric bearings f, on posts F2, which are attached to base
piece A', and brake-block M, attached to posts A³. Rigidly attached to the
spool and pulley shaft is a crank arm H, the pin of which is attached to a
rod J, provided with a lever J', at its upper end, which is within a watch-
box K, so that an operator stationed in the latter can force friction pulley F
against the brake-block M, or allow it to fall upon friction pulley L', upon line
shaft L. This shaft extends from one 'end of the wharf to the other, and is
revolved by an engine placed at one end thereof, and is adapted to give motion to
one or more derricks, and to allow the latter to be moved to any point thereon.
A longitudinal key way is formed in the surface of the shaft in which a feather
fastened to the friction roller L. slides thereby imparting the motion of the shaft
to, and allowing free motion of the roller lengthwise on the shaft. It is obvious
that the counterbalance can be dispensed with, and the cord or cable which is
attached to the forward end of the carrier extended to a drum which is operated
by substantially the same means used to operate the lifting cable drum. To insure
friction roller L¹ moving with the derrick, and always being under friction
roller F, two arms V, V, attached to the framework, one on each side of the friction
roller L, are provided, so that no matter which way the derrick moves the arms
will push the roller L' that way and always keep it under roller F¹. The carrier E
consists of a framework P, suspended from the axles of wheels e, and has a
sheave P¹ journalled at the inner end of the framework and a hook P' forming
part of the frame. The lifting cable E¹ is attached to hook P2, and passes over
sheave P¹. Suspended upon cable E¹, between the hook and sheave, is a pulley P³,
having a shank P, which passes up into the frame through an. opening O, having
inclined plates or guides o, for the shank. Above the opening is a hook R, which
catches in the eye of shank P, as shown in Fig. 6, and holds pulley P³ whilst the
load is being transferred. This hook R, is attached to a shaft r, journalled in the
framework, and has a crank arm R¹. Attached to the pin of this crank.arm is a
rod R2, which extends forward outside the framework and is attached thereto) by a
strap. Upon the outer end of rod R3, between collar ³, and the front edge of
the framework is a spring r³, coiled around the rod. The object of this spring is
こ

page_text: to force the rod outward so that when in the position shown in Fig. 6, it will draw
hook R immediately over spring S2, and into the eye of shank P. Pivoted to the
framework at 8, is a lever-latch S, which, whenever spring 82 presses the inner end
down catches upon catch b, as shown in Fig. 6. The inner end of the lever latch
is over the opening O, so that when shank P* passes into and through the latter, it
will elevate the inner, and depress the outer end of lever-latch S, and thus detach
it from latch b. If desired, the carrier may be provided with a latch at each end,
so that it will not be necessary to drop the latch except when it is necessary to
pass one of the latches. By using two or more latches coal, iron ore or other
substances may be moved from one receptacle to another placed within the frame
of the derrick by operating said catches in an obvious manner.
A carrier having
the additional latch and stop in dotted lines is shown in Fig. 6, and a skeleton of
the operating parts of such a carrier is shown in Fig. 8. As it is intended to have
the boom of the derrick about forty feet from the ground it will often be found
advantageous to have an adjustable rod to suspend the load from the pulley P³ of
the carriers as it will reduce the distance for the load to travel. This is peculiarly
advantageous in moving merchandise from one part of the wharf to the other or
for taking loads from large vessels. To accomplish this two rods N, N¹, are
provided, each having a sleeve n, which embraces the body of the other, and the
upper end N¹, provided with an eye n². The lower rod N, is provided with a
chain or other flexible substance, so that the hook n³, may be slipped under the
handle of a bucket, or in the eye of a sling for merchandise. After the rods have
been adjusted they may be fixed in place by set screws n¹
The operation is as follows:-The derrick is moved upon the track to any
desired point and then clamped to said track. The boom is now adjusted and
fixed in position by means of ropes or guys or stay-ropes 63, and windlasses 65.
The operator stationed in watch-box K suspends pulley F¹ between friction
pulley L' and brake-block M, by means of lever H, and J¹, and rod J, so that
counterbalance I, attached by a cord to the forward end of carrier E will draw the
latter upon the runways to the outer end of the boom. Lifting cable E' is paid
out as the carrier approaches the outer end of the boom and is kept tense by the
counterbalance, which prevents any unnecessary jar when the pulley is unhooked
and lowered. The speed with which the carrier travels can be regulated by
braking the friction pulley F¹ against brake block M. The several parts of the
carrier when moved upon the runways are in the position shown in Fig. 6, and
when the carrier reaches the outer end of the boom the end of rod R² strikes
against the end piece B³, turns shaft r by means of a crank arm R', and detaches
hook R from shank P¹ on pulley P³, leaving the latter in position to descend.
Cable E' is now slackened so that pulley P³ will run down on the cable to a point
where the load is attached. As shank P' leaves the carrier the upward pressure
upon the inner end of lever-latch S is removed and spring 82 forces it down, so
that the hooked end of the outer arm will catch upon catch b, and hold the carrier
as shown in Fig. 7. After the load has been attached to hook P³ on pulley P³,
friction wheel F is lowered upon pulley L, fixed upon revolving shaft L, and held
there by means of lever H, J', and rod J. The motion of friction pulley L, is
imparted to friction pulley, F¹, and spool F, which winds up lifting cable E¹, and
draws pulley P³ to the carrier. Shank P on pulley P³ passes between the guide
plates o, through opening O, strikes the inner end of lever-latch S, detaches its
hooked end from catch b, and the cable which is still being wound around spool F
starts the carrier moving in the runway towards the catch C. This movement
releases the end of rod R2 from the boom, and spring 2 forces it outwardly,
drawing with it, by means of crank R', and shaft r the hook R, which catches in
the eye of shank P. The carrier moves along the runway until it passes the point
where the catch C having its latch-bar in the position shewn in Fig 5 is fixed. The
operator then presses upon the outer end of lever G³, which elevates connecting
rod G and rock-rod G, by means of crank arm G₁. The rod in rocking turns dog g
and presses its outer end against the stop end of the catch bar, which is lifted to

page_text: the position shown in Fig. 4. The carrier is now drawn back until the latch S
catches upon the catch bar 03, one side of which is bevelled to permit the catch to
pass readily to the side it catches upon at the same time that the latch engages
with the catch, the rod which operates the hook strikes the latch-bar, and forces
the hook out of the eye of the shank in the pulley frame from which the bucket is
suspended; and the pulley descends by means of the lift rope from the carrier to the
receptacle and the load released. The pulley is now elevated by the lift rope, and
the shank of the pulley enters the opening in the carrier, is caught by the hook
and forces the outer end of the lever latch downward to release it from the latch,
so that the catch bar G³ can drop, and the carrier have free passage to the outer
end of the boom when it releases the pulley which descends for another load. In
Figs 13 14 and 15 is shown a modification of the drop-catch. The clip C' has a
moveable rack-bar c³, operated by a compound lever clo, which is struck by a
knuckle-jointed finger cl, on the carrier when the latter is moved forward. The
rack-bar turns the pinion-c¹³, which throws the bar C³ across the boom to clip C
where it is caught by latch c¹s. This movement is assisted by counterbalance c".
The carrier is now moved forward to the bar and is operated as before described.
The finger crests upon the spring c. The knuckle finger c¹³ catches upon
compound lever cle, which draws the latch cla away by means of T lever c¹, and
allows the bar C³ to drop. The spring c¹ receives the shock. When it is desired
to trip the bucket before it reaches the car either of the adjustable rods shown in
Figs 16 and 17 is attached to clip C². The trigger on the bucket in descending
will strike the angular part of the rod and cause the bucket to turn. What I claim
as new is: The derrick substantially as described. The catches C, substantially
as described. The catches C and the carriers having the fingers c¹ and c¹³. The
adjustable rods N & N'. The clip C³ and adjustable rods Figs 16 and 17.
In Witness whereof I the said Arthur Lewsley have hereunto set my Hand and
Seal this twentyfirst day of November A.D One thousand eight hundred and
eighty three