Improved Means for Lubricating Mechanical Stokers.
Year: 1892

page_text: Date of Application, 2nd June, 1892
Complete Specification Left, 1st Mar., 1893—Accepted, 22nd Apr., 1893
PROVISIONAL SPECIFICATION.
Improved Means for Lubricating Mechanical Stokers.
I JAMES PROCTOR of Hammerton Street Iron Works Burnley in the County
of Lancaster Engineer do hereby declare the nature of this invention to be as
follows:-
This invention relates to improved means for lubricating the worm and worm
wheel for driving the central vertical shaft, and the worm and worm wheel for
actuating the movable fire-bars, also the tappets of the "lautern wheel" which
actuates the radial shovels of mechanical stokers.
Great difficulty has hitherto been experienced in keeping those working parts of
mechanical stokers well lubricated which, being exposed to the heat of the furnace,
and to the coal dust which exists in a boiler house, are most liable to become hot
and burn up the oil, whereby the apparatus becomes stiff in its action and the
stoker considerably less effective.
The present invention is designed to remedy this defect by giving to the
working parts a continuous and copious supply of oil which keeps all the parts
working free and prevents their becoming clogged.
In the first place for the purposes of my invention for lubricating the worm
gearing at the lower end of the central vertical shaft, I attach to the boss which
supports the lower end of the same a small bracket carrying a short spindle or
shaft, and on the latter I fix a small disc with a grooved edge over which hangs
an endless chain the loop of which dips into an oil cistern beneath. On the inner
side of the disc is a conical boss carrying projecting pegs which lock into the
teeth of the worm wheel which drives the vertical shaft, so that the grooved disc
is caused to revolve and keep the endless lubricating chain in motion.
The larger end of the conical boss is further from the disc so that as the oil
overflows through a notch or notches in the edge thereof it gravitates towards
the pegs or pins which deliver it into the tooth of the worm wheel and keep it
constantly lubricated. Any excess of oil flows from this wheel downwards onto
the worm at the lower end of the vertical shaft which actuates the movable fire
bars. The oil cistern into which the chain dips extends also beneath this lower
worm, and the oil after lubricating both sets of wheels falls therefrom into the
cistern so that no oil is wasted.
For lubricating the tappets of the lantern wheel I cut or form in the edge of
the central plate or disc of the lantern wheel a circumferential groove in which
works an endless chain or other flexible band the lower part or loop of which
hangs in a cistern of oil placed beneath, and I cut or form transverse notches or
openings in the edge of the said plate, so that the lantern wheel revolves the
endless chain is continually taking up a supply of oil which escapes sideways from
the groove through these notches or openings, and runs onto the tappets which
thus lubricate the fingers on the shovel shaft, any excess of oil dropping back
again into the cistern.
Dated this 1st day of June 1892.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improved Means for Lubricating Mechanical Stokers.
I JAMES PROCTOR of Hammerton Street Iron Works Burnley in the County of
Lancaster, Engineer, do hereby declare the nature of this invention and in what
[Price 8d.]

page_text: manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement :-
This invention relates to improved means for lubricating the worm and worm
wheel for driving the central vertical shaft, and the worm and worm wheel for
actuating the movable fire-bars also the tappets of the "lantern wheel" and the
journals of the shovel shaft which actuates the radial shovels of mechanical stokers.
Great difficulty has hitherto been experienced in keeping those working parts of
mechanical stokers well lubricated, which, being exposed to the heat of the
furnace and to the coal dust which exists in a boiler house are most liable to
become hot and burn up the oil, whereby the apparatus becomes stiff in its action
and the stoker considerably less effective.
The present invention is designed to remedy this defect by giving to the working
parts a continuous and copious supply of oil which keeps all the parts working
free and prevents their becoming clogged.
The nature of my said invention and the manner in which the same is to be
performed or carried into practical effect will be readily understood on reference
to the drawings hereunto annexed and the following explanation thereof.
Fig. 1 is a face view (partly in section) and Fig. 2 a side view of my improved
apparatus.
In the first place for the purposes of my invention for lubricating the worm
gearing at the lower end of the central vertical shaft a I attach to the boss b
which supports the lower end of the same a small bracket c carrying a short spindle
or shaft d and on the latter I fix a small disc e with a grooved edge over which
hangs an endless chain f the loop of which dips into an oil cistern g beneath. On
the inner side of the disc e is a conical boss h carrying projecting pegs i which
lock into the teeth of the worm wheel which drives the vertical shaft a so that
the grooved disc e is caused to revolve and keep the endless lubricating chain fin
motion.
The larger end of the conical boss his further from the disc e so that as the oil
overflows through a notch or notches in the edge thereof it gravitates towards
the pegs or pins i which deliver it into the teeth of the worm wheel k and keep it
constantly lubricated. Any excess of oil flows from this wheel k downwards onto
the worm at the lower end of the vertical shaft a which actuates the movable
fire bars. The oil cistern g into which the chain f dips extends beneath this
lower worm, and the oil after lubricating both sets of wheels falls therefrom into
this cistern so that no oil is wasted.
For lubricating the tappet 1 of the lantern wheel m I cut or form in the edge of
the central plate or disc of the lantern wheel a circumferential groove in which
works an endless chain or other flexible band f¹ the lower part or loop of which
hangs in a cistern g¹ of oil placed beneath and I cut or form transverse notches or
openings in the edge of the said plate so that as the lantern wheel m revolves
the endless chain f' is continually taking up a supply of oil which escapes sideways
from the groove through these notches or openings and runs onto the tappets /
which thus lubricate the fingers n on the shovel shaft o any excess of oil dropping
back again into the cistern g¹. I also apply the chain as above for lubricating the
journals of the shovel shaft o.
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 :-
The improved means for lubricating the working parts of mechanical stokers
substantially as hereinbefore described and illustrated by the drawings annexed.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant