Improvements in Apparatus for Charging Furnaces with Motard
Year: 1892

page_text: COMPLETE SPE
PELLATION
GUR
int ads to 1930
ATION 21 & .IS Jozigas
Improvements in Apparatus for Charging Furnaces with Motard
I JAMES BUCHANAN Junior of Brasenose Road” Liverpoolanthe County of
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Lancaster, Engineer do hereby declare the nature of this invention and juhat
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
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The invention relates to apparatus for chargingnopen hearth and like furnhous
with pig or scrap iron or other required material:im ows otni det doid 1991w
Hitherto such machines have been unnecessarily cumbersomeland complex besides
being costly in maintenance and difficult to control canderegulate so as to pick up
and deposit the material on the hearth without damaging the furnace.ob
Now my invention has for its object to construct lapparatus which shall be durable,
efficient, and readily operated so as to layithe material gently onl the flurnace hearth
in the required position, without danger of damaging the couf, sides, or henthalt
Fig. is a longitudinal elevation, Fig. 2 a iplán;iFig.sta transverse section it
the line A-A of a furnace-charging apparatus under my inventioned d
Fig. 4 is an enlarged view in section of therrean end of thohydraulic cylinder
Fig. 5 is an enlarged view in section across the trunnions on which the hydraulic
cylinder oscillates, and
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Fig. 6 is an enlarged view part being in section shewing constructive detaibat
the front end of the hydraulic cylinder. men bina od 199wed bus 8 bil ods
The apparatus is mounted on a platform, constructed of longitudinala and cross
girders 1 and floor plates 2. The said iplatformtis: carried by wheelsi3ifree eb rim
on rails 4.
The shafts 5 of the wheels 3 are carried indbearings 6 secured to the
platform. One of the shafts is provided with a mitre wheel7qwhich gearsi with
a mitre wheel 8 on a cross-shaft carried in bearings secured to the platform. Tot
shaft carrying the wheel 8 is is also provided with a worms wheel which takesid
the worm 9 on a diagonal shaft 10. The shaft,10cis carried in bearings bland has
secured to it a mitre wheel 12 which stakes into mitre wheels 131 Do theydriving
shaft 14. The driving shaft 14 is carried in bearings 15lonothe: platform and sis
caused to rotate constantly in one directions by any suitableo motor, steam, gásgoil
or hydraulic. On the drawings a steam engine is indicated at 16 as the motorin
which case a steam generator would, be located at 17. Theimitre wheels pre
loose on the driving shaft and one or other is 'causeft to rotate litherewith bimeshs
of the usual clutch arrangement operated by la hand levend 8in the usual way t
will be obvious that by moving the hand, lever solas to foaisonetior totller of the
wheels 13 to rotate, the wheels 3 will beogaused to rotate in one origther.cdirection
so as to cause the platform and charging apparatus! to travel along the rails:4finite
desired direction.
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The main platform carries a frame.gomposed of longitudinal and cross-girders de
which frame rests freely on the cross-girderst ofothesmaintplatform: The
girder at the front end of the frame is made with airbearing 20 which fits onde a
pin 21 made with or secured to a crossigirder of the main platform.19 The readiend
of the frame is fitted with a curved rack 22 secured between the horizontaligirders
The rack 22 gears with a worm 23 9 shaft 24031Thdushaft 2 is carried a
bearings on the main platform and is fitted with a spur-wheel-261yhich geano with
a pinion 26 carried by a sleeve 27 free to rotate on the driving shaft 14. .The
sleeve 27 has secured to it a mitre wheel 28 189 mitre wheel gearing with the
wheel 28 and free to rotate on a stud or in a bearing 30 carried by the maint
forin. 31 mitre wheel free to rotate on the driving shaft 14 and gebring withdithë

page_text: wheel 29. 32 clutch lever and mechanism of usual construction for causing one or
other of the wheels 28, 31 to rotate with the driving shaft. It will be obvious
that as one or other of the wheels 28, 31 is caused to rotate with the shaft, that
the worm 23 will be caused to rotate in one or other direction and cause the
rack 22 and with it the rear end of the frame to travel towards one side or the
other of the main platform. The frame being thus caused to oscillate around
the pivot 21. 33 is a box-girder provided with arms 34 which are pivoted into
bearings 35 on the front ends of the longitudinal girders 19 of the frame, so that
the said box-girder 33 is free to oscillate on a horizontal axis. The rear end of
the box-girder 33 is coupled to a shaft 36 by means of links 37. The shaft 36
passes freely through a jaw 38 on an arm 39 secured to a shaft 40. The shaft 40 is
carried in bearings secured to the main platform and has secured to it a toothed
quadrant 41. The toothed quadrant 41 gears with a worm 42 on a shaft 43 carried
in bearings 44 on the main frame. The said shaft 43 has also secured to it a mitre
wheel 45 which takes into two mitre wheels 46 free to rotate on the main shaft 14.
:47 clutch lever and mechanism as before. It will be obvious that as one or other
of the wheels 46 is caused to rotate with the shaft 14 that the worm 42 will be
caused to rotate in one or other direction and give like motion to the quadrant 41
and arm 39, the rear end of the box-girder 33 will be consequently raised or
lowered by the links and caused to oscillate in the bearings 35 at the same time
that the frame may also be caused to oscillate on the pivot 21 by reason of the
freedom of motion of the shaft 36 in the jaw 38.
Beneath the loose girder 33 is secured the hydraulic cylinder 48 by means of
flanges and bolts. Within the cylinder 48 a ram 49 is free to work, the front end
of such ram being carried on a roller 50 suspended by straps 51 from the front
end of the box girder 33. The ram 49 is hollow, and within it fits a tube 52
secured to the cover 53 of the cylinder 48.
the cylinder 48 and between the said ram and the tube 52. 55 aperture leading
54 packing between the ram 49 and
into the interior of the ram. The tube 52 simply acts as a displacer so as to allow
of the cylinder and ram being sufficiently large in diameter to possess the required
stiffness and rigidity without using any greater quantity of water, any water
leaking past the packing 54 into the interior of the ram 49 will flow away through
the aperture 55 and so prevent the apparatus from becoming jammed. The ram is
fitted with a head 56 having horns 57 which take into lugs 58 on trays 59. The
trays 59 are carried on trolleys 60 which run on rails 61 in front of the furnaces to
be charged. The front end of the cylinder 48 is connected by a pipe 62 with a
valve case 63 carried by the main platform. In the pipe 62 is a valve 64 for
regulating the speed of flow of water through the said pipe 62. The rear end of
the cylinder 48 is connected to the valve case 63 by a flexible pipe 65. 66 pressure
supply-pipe. 67 exhaust. 68 lever pivoted at 69 to the main platform and at 70 to
the valve 71. It will be seen that in the position of the valve shown in Fig. 3 that
the passage to the rear end of the cylinder and to the exhaust is closed whilst the
way to the front end of the cylinder is open through the centre of the valve, in
fact water at pressure is always in free communication with the front end of the
cylinder. When the valve is lifted, the way to the rear end of the cylinder is
opened and there is pressure in both ends but owing to the larger effective area of
the rear end of the ram, the said ram will be forced forward at such speed as is
allowed by the flow of water from the front end part of the valve 64. When the
valve 71 is lowered, communication is shut off between the supply and the rear end
of the cylinder and the ram remains stationary until the valve is further lowered
and communication is made between the way leading from the rear end of the
cylinder by the annular recess around the valve 71 to the exhaust way 67, when
the continuous pressure in the front end of the cylinder causes the ram to travel
back.
72 is a rake or pusher which fits the end of the tray 59 and is carried by rods 73
which pass freely both through guides 74 on the ram head 56 and through apertures
in the arms 34. To the ends of the rods 73 are secured chains or wire ropes 75

page_text: which pass around guide pulleys 76 carried by standards 77 secured to the
oscillating frame. The said chains or wire ropes also pass around multiplying
pulleys 78 and 79, the former being carried on a shaft supported by the standards 77
and the latter by a shaft coupled to a balance weight 80. 81 are collars on the
rods 73 which as the head 56 moves forward,-carry forward with them the rods 73
and rake or pusher 72, owing to the said collars 81 coming into contact with the
guide 74 on the head 56.
82 are wedge pieces secured to the levers 83 pivoted to the arms 34 at 84.
85 cross shaft coupling the levers 83 to the rod 86 which screws through a nut 87
in the coupling shaft 85. 88 standard secured to the box-girder 33 for supporting
the rod 86. 89 hand wheel for rotating the rod 86. When the ram 49 and with it
the tray 59 and rake or pusher 72 have been carried into the required position the
wedges 82 are advanced by the hand wheel 89 so as to jam between the rods 73 and
the arms 34 and hold the rods and with them the rake or pusher 72 in position.
The ram 49 and with it the tray 59 are then withdrawn until the metal held in
position by the rake or pusher slides off the tray and is laid on the furnace hearth.
The wedges are then released and the balance weight 80 draws back the rods 73
and rake or pusher 72 until the collars 81 and guides 74 are in contact.
The hydraulic pressure is obtained from an accumulator and pumps operated by
the engines 16 or by steam pressure from the boiler or from stand pipes connected
with a hydraulic main.
The apparatus is used as follows:-A trolley carrying a tray containing the
metal to be deposited in the furnace is run in front of the apparatus, the ram is
caused to advance until the horns enter the lugs of the tray and the rake or pusher
is in position. The hydraulic cylinder is then tilted on its horizontal axis to lift
the tray off the trolley and the ram is advanced until the tray is the proper
distance within the furnace; the frame is then moved on its vertical axis if
necessary to bring the tray over the hearth to one side or other of the centre of the
furnace. The hydraulic cylinder is now tilted, if required on its horizontal axis so
as to bring the tray close to the hearth, and the rake or pusher is secured in position
by the wedges. The ram and tray are then withdrawn until the metal is laid on
the hearth after which the rake or pusher is released and the parts return to their
normal position. The empty tray is deposited on the trolley which is removed and
a following trolley and tray are run into position.
It will be evident that instead of having a tramway and trolley for conveying
the trays 59 to and from the ram-head, that a crane or other suitable device may
be used for that purpose.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
First. The combination of a shaft 14 rotating in one direction with three sets of
reversing gear, one, for giving traversing motion to a platform; a second, for
giving oscillating motion to a frame, and a third for giving tilting motion to a
hydraulic cylinder in apparatus for laying metal on furnace hearths.
Second. The combination of a girder 33 pivoted horizontally to a frame with a
hydraulic cylinder suspended therefrom for the purpose set forth.
Third. The combination of a girder 33, hydraulic cylinder 48, ram 49, and
carrying roller 50 for the purpose set forth.
Fourth. The combination of a hydraulic ram 49, head 56, horns 57 with a
tray 59 and lugs 58 for the purpose set forth.
Fifth. The combination of a girder carrying a hydraulic cylinder with tilting
gear operated from a driving-shaft rotating in one direction.
Sixth. The combination of a frame carrying a hydraulic ram pivoted thereto,
with oscillating gear operated from a driving shaft rotating in one direction.
Seventh. The combination of the shaft 36 of the hydraulic cylinder tilting gear
with the jaws 38 of the gear for giving tilting motion substantially as set forth for

page_text: the purpose of allowing oscillating motion to the frame carrying the hydraulic
cylinder.
Eighth. The combination with a hydraulic ram of a pusher or rake and
securing and balancing devices for the purpose set forth.
Ninth. Apparatus for charging furnaces with metal, substantially as herein set
forth.
Dated the 31st day of Octuber 1805
Per pro J. T. KING,
J. Johnson,
Agent.