Improvements in Mechanical Stokers for Steam Boiler and other Furnaces.
Year: 1890

page_text: Date of Application, 18th Mar., 1850
Complete Specification Left, 18th Dec., 1890-Accepted, 24th Jan., 1891
PROVISIONAL SPECIFICATION.
Improvements in Mechanical Stokers for Steam Boiler and other
Furnaces.
We JOHN VICARS, THOMAS VICARS, and JOHN VICARS the younger, all of 56 Seel
Street. Liverpool, in the County of Lancaster, Engineers, do hereby declare the nature
of this invention to be as follows:-
The invention relates to improvements in our well known mechanical stokers or
equivalent stokers in which fire bars are carried forward in a body from the front to the
rear of the grate and are moved back again in detachments or one at a time.
The main objects are to so construct such stokers that the front of the generator
above the furnaces may be readily reached when desired for the purpose of inspection,
cleaning fire tubes or other reasons, to render parts liable to destruction by heat
more durable and to admit air to support combustion in a more advantageous
manner.
Our improvements consist:-
First. In constructing and jointing to the main frame of the stoker the hopper for
conveying fuel to the feed plungers in such manner that the said hopper may be readily
turned away from the front of the generator when desired.
Second. In providing between the fuel delivery orifice of the stoker and the roof of
the furnace mouth a hollow jacket in one or more pieces provided with inlet and
outlet ways through which air is admitted onto the burning fuel near the middle of
the grate.
Per pro J. T. KING,
J. Johnson,
A rent.
COMPLETE SPECIFICATION.
Improvements in Mechanical Stokers for Steam Boiler and other
Furnaces.
We JOHN VICARS, THOMAS VICARS, and JOHN VICARS the younger, all of 56 Seel
Street Liverpool, in the County of Lancaster, Engineers, do hereby declare the
nature of this invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
The invention relates to improvements in our well known mechanical stokers or
equivalent stokers in which fire bars are carried forward in a body from the front to
the rear of the grate and are moved back again in detachments or one at a time.
The main objects are to so construct such stokers that the front of the generator
above the furnaces may be readily reached when desired for the purpose of inspection,
cleaning fire tubes, or other reasons, to render parts liable to destruction by heat
more durable and to admit air to support combustion in a more advantageous
manner.
Our improvements consist,
First. In constructing and jointing to the main frame of the stoker the hopper for
conveying fuel to the feed plungers in such manner that the said hopper inay be
readily turned away from the front of the generator when desired.
Second. In providing between the fuel delivery orifice of the stoker and the roof of
the furnace mouth,
a hollow jacket in one or more pieces provided with inlet and
outlet ways through which air is admitted on to the burning fuel near the middle of
the grate.

page_text: DESCRIPTION OF THE DRAWINGS.
Fig 1 is a front view and Fig. 2 a side elevation part being in section of a steam
boiler furnace fitted with a mechanical stoker constructed in accordance with our
invention. a represents the steam boiler, b, the furnace, e, the mechanical stoker con-
structed with movable bars in our well-known manner, d hopper for supplying fuel to the
stoker. The said hopper is hinged at e to the main frame of the stoker e, so that it
can be readily turned down as shown by the dotted lines and expose the front
of the boiler or generator, g, is a hollow jacket in three pieces secured between the.
fuel delivery orifice of the stoker and the roof i of the furnace mouth, j, are air ways
into the jacket g, h, are air ways out of the jacket and into the furnace. It will bo
seen that air to support combustion, enters the jacket and becoming heated passes
into the furnace near the middle of the grate and over the burning fuel.
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. hopper and stoker jointed together substantially in the manner and for the
purpose set forth.
Second. Constructing furnaces with a mechanical stoker and hollow jacket disposed
substantially in the manner and for the purpose set forth.
Dated the 17th day of December 1890.
Per pro J. T. KING,
J. Johnson.
Agent.