Year: 1885

page_text: I THOMAS FLETCHER of Thynne Street, Warrington in the County of Lancaster,
Gas Engineer 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 :-
This Invention relates to the hot plate bars of gas cooking ranges.
Hitherto these bars have been made solid or they have been provided with holes
formed through the plate or web of the bar or they have been furnished with studs
or projections, but in all cases they have either had a great cooling effect upon the
flame, causing imperfect combustion or they have twisted bent or buckled in use,
while in some cases both of these defects have been combined.
These Improvements consist in a novel method of forming or constructing the
bars in such a manner as to obviate or prevent the defects hereinbefore referred to.
And in order that this Invention. may be more readily understood and carried
into practical effect I have hereunto appended a sheet of drawings, reference being
hereinafter had thereto and to the letters of reference denoting the various parts of
the bar as represented in the various Figures.
Fig. 1 is a side elevation of a portion of a bar constructed according to these
Improvements.
Fig. 2 is a vertical section through A. B. and Fig. 3 is a similar section through
C. D. of Fig. 1.
Upon the upper edge of the bar I cast punch or otherwise produce or form
a series of openings E. E. which separate the upper edge into a corresponding series
of projections F. F. which are lengthened or expanded laterally as shown at G. G.
By this method of construction I produce a practically continuous level upper
surface or edge with free ventilation through the bar thus diminishing the
tendency to cool the flame, whilst owing to the division of the upper edge of
the bar the tendency to twist bend or buckle is greatly reduced.
The lower edge of the bar may be bevelled on one or both sides or it may
be rounded or scolloped or otherwise shaped or formed as desired but in most cases
I prefer to employ a square edge as indicated in the drawings.
I desire it to be understood that I do not claim the construction of bars for the
hot plates of gas cooking ranges, having holes formed through the web or plate of
the bar without a divided upper edge or surface, nor do I claim the construction
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page_text: of such bars having studs or other projections upon the upper edge or surface
without the corresponding holes or openings through the bars, both of these forms
being already in use. I desire it also to be understood that I do not confine
myself to the precise shape form or configuration of the openings E. E. or of the
intervening solid parts or projections F. F. as these may be considerably varied
without departing from my Invention.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
The construction of hot plate bars for gas cooking ranges, which consists in the
production or formation of a series of openings E. E divided from each other by
the solid parts or projections F. F. in such a manner as to produce a practically
continuous level surface or upper edge and permit the passage of flame and heat
through the bars, substantially as herein before setforth and described and as
illustrated on the accompanying sheet of drawings.
Dated this Sixteenth day of December in the year of our Lord One thousand