Improvements in and connected with Ignition Tubes for Gas Engines.
Year: 1892

page_text: Date of Application, 23rd Sept., 1892-Accepted, 29th Oct., 1892
COMPLETE SPECIFICATION.
Improvements in and connected with Ignition Tubes for Gas
Engines.
J, GEORGE WHITTAKER, of East Street Lower Mosley Street, Manchester in
the County of Lancaster, 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 ignition tubes for gas engines and to the burners
employed for the purpose of heating the tubes, and its objects are to economise
the consumption of gas in the heating burners, and to make the ignition tubes
more certain in their action, and more durable than at present, and to prevent their
becoming choked up after a comparatively short period of use.
The ignition tube constructed according to these improvements consists of a
bulbous forging or casting, the interior of which communicates with the interior of
the cylinder of the gas engine. It is heated by means of an annular burner
surrounding the bulbous part of the tube. In use, the bulbous ignition tube is
enclosed within a chimney which is by preference lined with asbestos. The
chimney and the burner at the base of the chimney are adjustably arranged, so
that the heat from the burner may be applied at a higher or lower part of the tube
as may be desirable or necessary.
I will more particularly describe my said invention with reference to the
accompanying drawings, in the various figures of which similar parts are denoted
by similar letters.
Figure 1 is a sectional side view;
Figure 2 a sectional end view; and
Figure 3 a plan.
Figure 4 is an elevation on an enlarged scale of the bulbous ignition tube.
This ignition tube may be of from 1.25 to 1.5 in. in diameter in the bulbous
part A, and about 4 in. long over all. It is screwed by its screwed stem into the
block B, through which there is a port leading from the stem to the interior of
the cylinder, as indicated by the dotted lines in Figures 1, 2, and 3, so that the
interior of the cylinder and the interior of the bulb may freely communicate with
each other.
The ignition tube is centrally arranged in the lower part of the chimney C,
which is preferably lined with asbestos as indicated by the full black lines, and
which is vertically adjustable by means of a screw G, upon a rod fixed upon
the block B, and passing through a lug cast upon the chimney, or by other
equivalent means.
The burner which I prefer to employ for heating the ignition tube, consists of
the annular chamber D having a perfectly annular outlet surrounding the ignition
tube as shewn. Mixed air and gas is supplied to the annular burner through the
pipe E, to which gas is supplied through the control tap F. The lower part of
the pipe E has perforations made in it as shewn, for the admission of air. The
gas is supplied to this tube through an axial jet which may be of such dimensions
as to pass from two to three cubic feet of gas per hour. This part of the
apparatus corresponds with the mixing tube of an ordinary atmospheric gas burner.
The chimney and the outer part of the burner may conveniently be cast together,
and the inner part of the burner may be secured in place by internal and external
screws or by other means.
Although I generally employ the dimensions and quantity hereinbefore set forth,
I desire it to be understood that I do not limit myself to them, nor to the precise
construction and arrangement of the burner and chimney

page_text: 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 :-
1. A. bulbous ignition tube for gas engines, constructed and arranged substantially
as hereinbefore described and as illustrated by the accompanying drawings.
2. The combination and arrangement in a gas engine, of a bulbous ignition tube,
an annular burner surrounding the tube, and a vertically adjustable chimney
preferably lined with asbestos; substantially as hereinbefore described and as
illustrated by the accompanying drawings.
Dated this 20th day of September A.D. 1892.
WILLIAM E. HEYS,
Agent for the Applicant.