A Governor for Gas and Oil Motor Engines.
Year: 1891

page_text: Date of Application, 23rd Apr., 1891
Complete Specification Left, 22nd Sept., 1891-Accepted, 24th Oct., 1891
PROVISIONAL SPECIFICATION.
A Governor for Gas and Oil Motor Engines.
I, JOHN JAMES PURNELL, of Atlas Works, Webber Street, Lambeth in the
County of Surrey, Engineer, do hereby declare the nature of this invention to
be as follows:-
My invention relates to a simple and inexpensive governor for an engine
worked by the combustion of gas or inflammable vapour mixed with air. On the
reciprocating rod which works the valve or valves I pivot a lever or arm the
end of which is of hook form, and which is pressed by an adjustable spring or
weight in one direction. This arm is arranged to reciprocate in front of a rod
connected to the gas or vapour supply valve, the hook presenting itself 'towards
an undercut inclined recess in the face of this rod, and being urged by the
weight or spring to engage itself in this recess. As the reciprocating valve rod
makes its stroke in the one direction the hook end of the arm carried by it, moving
along the incline of the recess is pushed away; as the rod and arm make their
stroke in the opposite direction, if this stroke be made at moderate speed the hook
of the lever has time to enter the recess and, as it continues its stroke, it, pulls the
rod of the supply valve, opening the valve so as to admit the combustible gas or
vapour to charge the cylinder. If however, the stroke is made too quickly the
hook of the lever has not time to engage in the recess of the rod, and consequently
the-supply valve is not opened during that stroke, nor until the speed of the engine
becomes so far moderated that the hook has time to engage with the rod of the
supply valve.
By adjusting the spring or weight that bears on the arm, the speed of the engine
may be regulated as desired; the more the arm is pressed the greater is the speed
at which the engine can work.
Dated this 23rd day of April 1891.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
A Governor for Gas and Oil Motor Engines.
I, JOHN JAMES PURNELL, of Atlas Works, Webber Street, Lambeth in the
County of Surrey, 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 :-
My invention relates to a simple and inexpensive governor for an engine worked
by the combustion of gas or inflammable vapour mixed with air. The accom-
panying drawing is an elevation partly in section shewing the operating parts of a
governor ascending to my invention. On the reciprocating rod A which works the
valve or valves that determine, the charging, ignition and exhaust, I pivot a lever
or arm B the end of which at C is of inclined hook form and which is pressed by
This arm B is
an adjustable spring D, or it might be a weight, in one direction.
arranged to reciprocate in front of a rod E connected to the gas or vapour supply
valve, G, or, as shewn, in front of the stem of the valve itself, the hook C
presenting itself towards an undercut inclined recess H in the face of this rod or
stein and being urged by the spring D or its equivalent to engage itself in the
recess H. As the reciprocating valve rod A makes its down stroke the inclined
end of B, moving along the lower incline of the recess H, is pushed away from the

page_text: stem E. As the rod A and arm B make their upstroke, if this stroke be made
at moderate speed, the hook C has time to enter the recess H and, as it continues
its upstroke, it pulls up the rod E of the supply valve, opening the valve so as to
admit the combustible gas or vapour to charge the cylinder. If, however, owing
to excessive speed of the engine, the upstroke of A is made too quickly, the
hook C has not time to engage in the recess H and consequently the rod E is not
raised and the supply valve is not opened during that stroke, nor until the speed of
the engine becomes so far moderated that the hook has time during its upstroke to
engage with the recess of the rod E and so to open the supply valve.
By adjusting the spring or weight that bears on the arm B, the speed of the
engine may be regulated as desired; the more the hooked end of the arm B is
pressed towards E the greater is the speed at which the engine can work. Although
I have shewn the rods A and E arranged and moving vertically, they might
obviously be horizontal or inclined, according to the particular form of the engine
of which they form part.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
A governor for a gas or oil motor engine consisting of an arm pivotted on the
reciprocating valve rod of the engine and presenting an inclined hooked end
towards an inclined recess on the gas or oil supply valve rod, so that the hook,
being adjustably pressed towards the said rod, engages with and moves it or not,
according as the engine moves at moderate or excessive speed, substantially as
described.
Dated this 21st day of September 1891
ABEL & IMRAY,
Agents for the Applicant.