improvements in Dakers not lates.
Year: 1898

page_text: improvements in Dakers not lates.
I, CHARLES Low BUCHAN, of 3, South Crown Street, Aberdeen, N.B.; Baker,
do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in bakers' hot plates which are heated
by gas and employed for "firing" scones muffins, and the like:
These hot plates are usually heated by ordinary Bunsen burners. one of the
difficulties of which is the getting an equal distribution of heat. This I over-
come by forcing air into the gas pipe thus obtaining a hotter flame with less
gas and no burning back and at the same time ensuring more satisfactory work.
In carrying out my invention I may employ an air tube of suitable dimensions
following the contour of the gas pipe and connected thereto by suitable branches
situated where found most convenient. The air is forced into the air tube by
any suitable fan and finds its way through the branches into the gas pipe where
it becomes mixed with the gas and led to the burners.
Dated this 3rd day of February 1808
JOHNSONS,
Petitioner's Agents,
115, St. Vincent Street, Glasgow.
Improvements in Bakers' Hot Plates.
CHARLES LOW BUCHAN, Manufacturing Baker, 3, South Crown Street, Aber-
deen, N.B., 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:
Figs. 1, 2, and 3 of the accompanying drawings shew end and side elevations
and plan respectively of the general arrangement of the invention.
The hot plate A is heated by burners B which consist of horizontal parallel
tubes effectively perforated on their upper surfaces. The burners are supplied
with gas conveyed in pipes C, the amount of gas required being regulated by
means of cocks D; one to each burner.
Air under pressure is supplied to the burners by means of pipes E; each of
which is also under control by a cock F; thus the necessary proportion of gas
and compressed air is obtained to form a mixture giving the maximum amount
of heat, uniformly distributed over the burner.
In addition to the gas cocks F there is also fitted a cock G on main gas supply
Die R71

page_text: pipe, used for turning on and off supply of gas to burners, and also for regulating
the amount of gas when fluctuations of pressure occur.
A similar cock H is fitted to the main air supply pipe, between the air supply
source and the regulating cocks F.
In bakeries equipped with power the current of air may be produced under con-
stant pressure by means of a revolving fan; and where no motive power is avail-
able, an air cylinder charged by a force pump to a high pressure may be used,
a regulator being fitted to the cylinder to control the discharge-of-air-into-the-
burner. The cylinder would be recharged by the pumps when it became ex-
hausted or when the pressure of air became so low as to impair the efficiency of
the flame at the burner
Having now particularly described and ascertained the nature of my said
invention, and in what manner same is to be performed, I declare that what
I claim is:
1. That by the use of compressed air and coal gas in the manner described
above, I obtain a Bunsen flame of uniform intensity throughout the burners.
2. By this arrangement there is complete combustion, hence there is neither
smoke nor smell to render the atmosphere impure.
3. Owing to strength and uniformity of heat, working capacity of plate, com-
pared with any former style of plates known of by me, is greatly increased, and
in addition to the great saving in time, the expense for gas is greatly lessened.
Dated this Twenty-third day of May Eighteen hundred and ninety-eight.