Improvement in and connected with the Valves of Gas Engines.
Year: 1891

page_text: Date of Application, 30th Oct., 1891-Accepted, 9th Jan., 1892
COMPLETE SPECIFICATION.
Improvement in and connected with the Valves of Gas Engines.
ABRAHAM EARNSHAW of Forest Villa Ovenden Halifax, Yorkshire Master
Engineer and Tool Maker and TOM OLDFIELD 32 Booth Town Road Halifax
Yorkshire Draughtsman 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 :—
Firstly. To employ two circular taper valves one with suitable thoroughfares
to admit the gas and air into the cylinder of the gas engine, and in the said circular
taper valve a suitable thoroughfare to allow the waste products of combustion to
escape into the atmosphere.
The said circular taper valve is shown at (A in Figs. 1. 3. 8 and 9). The
thoroughfares in the said circular taper valve are shown along with the sections
through the cylinder and valve case (Figs. 4. 5. 6. and 7), C in Figs. 1. 2. and 3)
gives a general view of the place of escape for the waste products of com-
bustion; (C in sectional drawing Fig. 4) shows the said thoroughfare in the said
circular taper valve, through which the waste products of combustion escape
from the cylinder into the atmosphere, (D in Figs. 1 2 and 3) gives a general
view of the place where the gas is admitted into the cylinder, (D in sectional
drawing Fig. 5) shows the said thoroughfare in said circular taper valve
through which the gas is admitted into the cylinder. (E in Figs. 1. 2. and 3)
gives a general view of the place where the air is admitted into the cylinder.
(E in the sectional drawing Fig. 6) shows the said thoroughfare in the said
circular taper valve, through which the air is admitted into the cylinder.
The second circular taper valve is shown by (B in Figs. 1 3 8 and 9) and is
made with a spigot to fit into a faucet (shown at O in Fig. 8) made in the
circular taper valve shown by (A in the Figs. 1. 3. 8. and 9).
In this second circular taper valve is the ignition thoroughfare and an arrange-
ment for adjusting this said valve in order that the ignition of the combustible
charge in the cylinder may be made to take place at the proper time.
(Fin Figs. 1 and 3) gives a general view of the place where the ignition tube
is fixed.
(B in Figs. 1. 3. 8. and 9) shows the second circular taper valve.
(F in sectional drawing Fig. 7) shows the thoroughfare in which the explosive
mixture is pressed up into the ignition tube (H).
The arrangement for the adjusting of the second circular taper valve shown by
(B Figs. 8 and 9) is as follows.
Through this said valve is a curved hole (G Fig. 9) through this said curved
hole a screw (R Fig. 8) is put into a hole (Z Fig. 8) in valve (A) Fig. 8).
The aforesaid valves are coupled together in the manner described and they
make one revolution, for the crank shaft two revolutions.
Secondly. We make the aforesaid circular valves taper and the valve case taper
to suit the taper of the valves, shown by dotted lines (S S) Figs. 1. and 3) also we
employ a spiral spring (T) Figs. 1. and 3) between two thrust collars (UU)
Figs. 1 and 3) on the valve shaft (N Figs. 1 and 3) and a thrust bracket (V Figs. 1
and 3) secured to the body of cylinder, between the thrust bracket (V) and the
front valve cover (M Figs. 1. and 3) we put the spiral spring (T) between the
loose thrust collars (U U), the said spiral spring is put into its place in a compressed
state. This being so, the spiral spring will force the circular taper valves (A
and B) into the valve case ($ S) with sufficient tightness to keep the gas and air in
their proper thoroughfares at the same time the arrangement herein described will
compensate for all wear in the valves and their seat.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion we declare that what we claim is,
Firstly. The employment of two circular taper valves loosely secured together
with the principle of adjustment embodied therein as hereinbefore described.
Secondly. The arrangement for taking up wear embodied in the taper of the 5
valves and the use of the spiral spring as hereinbefore described.
Dated this Twenty-ninth day of October 1891.
ABRAHAM EARNSHAW.
TOM OLDFIELD.