Mechanism for Actuating the Valves of Gas and Oil Motor Engines.
Year: 1899

page_text: Date of Application, 30th May, 1899
Complete Specification Left, 28th Feb., 1900-Accepted, 30th Aug.,
1900
PROVISIONAL SPECIFICATION.
Mechanism for Actuating the Valves of Gas and Oil Motor Engines.
I, CHARLES DENTON ABEL, of Birkbeck Bank Chambers, Southampton Buildings,
in the County of London, Consulting Engineer and Chartered Patent Agent, do
hereby declare the nature of this invention (as communicated to me from abroad
by Heinrich Eckhardt, of No. 13, Lutzow-Ufer, Berlin, Germany, Engineer)
to be as follows:-
This invention relates to improved mechanism whereby two valves of a gas
or petroleum motor engine are actuated during the same part of a stroke of the
engine piston but at different times. I will describe the mechanism for this pur-
pose with reference to the accompanying drawing which shews a cross section of
the engine cylinder with the said mechanism in two different positions.
I will assume the upper valve at a to be the valve for the admission of a charge
of combustible fluid into the cylinder while the lower valve serves for the
admission of charges of compressed air for starting the engine. Thus the valve b
will only require to be actuated a few times when first starting the engine, during
which time the valve a is thrown out of action and when the engine has been
fully started by a series of charges of compressed air, the valve requires to be
thrown out of action and valve a is put in action, so as to work the engine with
combustible charges in the usual manner.
The introduction of the compressed air charges, as well as that of the com-
bustible charges is effected at the commencement of the outstroke of the piston.
Both valves can therefore be actuated by means of one and the same cam c and
mechanism def g acting in combination therewith.
The throwing in or out of gear of the one or the other valve is effected as
follows:-
The vertical spindle e has screw-threads of opposite pitch formed on its two
ends, which screw respectively into internally threaded sleeves h and i which are
pivotally connected to the valve levers f and
9.
On the upper end of the rod e is a locking sleeve k which can slide vertically to
a slight extent on the rod and is kept by a suitable internal spring in the raised
position in which its toothed upper end is engaged with the toothed lower end of
the sleeve so as to lock the spindle in whatever position it has been adjusted
to.
The sleeve carries a hand wheel by means of which, when the sleeve is
pressed downward so as to be disengaged from the sleeve h, the spindle e can be
turned so as by the action of its opposite screw threads, to move the sleeves h
and nearer together or farther apart."
When the engine is to be started by means of charges of compressed air,
admitted through valve at b, the spindle is turned so as to move the sleeves h
and and their pivotal connection with the levers f the maximum distance apart.
By this adjustment the front arm fl of the lever f is depressed
to such an extent, that it does not come
the
in contact with
con-

page_text: a
tact surface of the valve when the spindle e has been brought
to its lowest position by the lever d acted upon by the cam c. The pivots of
the sleeve on the other hand are in this position seated in the bottom of the
fork of lever g so that on the spindle e being moved downwards by the cam c
and lever d the lever g will be actuated so as to open the compressed air valve
at b. This is the position of the spindle e shewn at Fig. 1.
When, after starting, the engine is to be worked by combustible charges, the
sleeve is first depressed so as to come out of engagement with sleeve h, as
shewn at Fig. 1 and spindle e is then turned by the hand wheel in the direc-
tion for bringing the pivots of sleeves i and h nearer together. By this motion,
lever will be moved so that its arm fl will be raised into contact with the
abutment surface collar 2 on the spindle of valve a, while at the same time the
sleeve will be raised so that its pivots are no longer in contact with the fork
of and will be prevented from actuating the lever g when the rod and its
sleeves are brought by lever d into their lowest position so that the compressed
air valve b will now remain closed and valve a will be actuated for the admission
of combustible charges during the normal working.
This is the position of the parts shewn at Fig. 2.
It will be seen that by the simple turning of the spindle e in the one direc-
tion or the other, the engine can either be started with charges of compressed
air, or worked with combustible charges
It is to be understood that the valves a and b may serve for the introduction
of other fluids than compressed air and combustible liquid, and also, that the
described mechanism can be made to operate other starting gear than the lift
valves a and b, provided such gear admits of the described action of the said
mechanism.
Dated this 30th day of May 1899.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Mechanism for Actuating the Valves of Gas and Oil Motor Engines.
I. CHARLES DENTON ABEL. of Birkbeck Bank Chambers, Southampton Buildings,
in the County of London, Consulting Engineer and Chartered Patent Agent, do
hereby declare the nature of this invention (as communicated to me from abroad
by Heinrich Eckhardt, of No. 13, Lutzow-fer, Berlin, Germany. Engineer).
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 improved mechanism whereby two valves of a gas
or petroleum motor engine are actuated during the same part of a stroke of the
engine piston but at different times. I will describe the mechanism for this pur-
pose with reference to the drawing accompanying my Provisional Specification
which shews a cross section of the engine cylinder with the said mechanism in two
different positions.
I will assume the upper valve at a to be the valve' for the admission of a charge
of combustible fluid into the cylinder while the lower valve 6 serves for the
admission of charges of compressed air for starting the engine. Thus the valve h
will only require to be actuated a few times when first starting the engine, during
which time the valve a is thrown out of action and when the engine has been
fully started by a series of charges of compressed air, the valve b requires to he

page_text: thrown out of action and valve a is put in action, so as to work the engine with
combustible charges in the usual manner.
The introduction of the compressed air charges, as well as that of the com-
bustible charges is effected at the commencement of the outstroke of the piston.
Both valves can therefore be actuated by means of one and the same cam c and
mechanism def g acting in combination therewith.
The throwing in or out of gear of the one or the other valve is effected as
follows:-
It is assumed that the admission valve at a for the combustible charges opens
outwards, while the starting valve opens inwards, and that consequently the
former is held on its seat by a spring, while the latter is held on its seat by the
gaseous pressure within the cylinder. The opening movement of both valves
therefore takes place in an upward direction, and the closing movement in the
downward direction.
The vertical spindle has screw-threads of opposite pitch formed on its two
ends, which screw respectively into internally threaded sleeves h and i which are
pivotally connected to the valve levers f and
9.
On the upper end of the rod e is a locking sleeve which can slide vertically to
a slight extent on the rod, but cannot turn thereon, and is kept by a suitable
internal spring in the raised position in which its toothed upper end is engaged
with the toothed lower end of the sleeve h so as to lock the spindle e in what-
ever position it has been adjusted to.
The sleeve carries a hand wheel by means of which, when the sleeve is
pressed downward so as to be disengaged from the sleeve h, the spindle c can be
turned so as by the action of its opposite screw threads, to move the sleeves h
and nearer together or farther apart.
When the engine is to be started by means of charges of compressed air,
admitted through valve at b, the spindle is turned so as to move the sleeves h
and and their pivotal connection with the levers f the maximum distance apart.
By this adjustment the front arm of the lever f is depressed
to such an extent, that it does not come in contact with the con-
tact surface of the valve " when the spindle e has been brought
to its lowest position by the lever d acted upon by the cam C. The pivots of
the sleeve on the other hand are in this position seated in the bottom of the
fork of lever g so that on the spindle e being moved downwards by the came
and lever d the lever will be actuated so as to open the compressed air valve
at b. This is the position of the spindle shewn at Fig. 1.
When. after starting, the engine is to be worked by combustible charges, the
sleeve is first depressed so as to come out of engagement with sleeve h, as
shewn at Fig. 1ª, and spindle is then turned by the hand wheel in the direc
tion for bringing the pivots of sleeves i and h nearer together. By this motion,
lever will be moved so that its arm f' will be raised into contact with the
abutment surface collar on the spindle of valve a, while at the same time the
sleeve will be raised so that its pivots are no longer in contact with the fork
of and will be prevented from actuating the lever g when the rod and its
sleeves are brought by lever d into their lowest position so that the compressed
air valve b will now remain closed and valve a will be actuated for the admission
of combustible charges during the normal working.
This is the position of the parts shewn at Fig. 2.
It will be seen that by the simple turning of the spindle e in the one direc-
tion or the other, the engine can either be started with charges of compressed
air, or worked with combustible charges
It is to be understood that the valves a and b may serve for the introduction
of other fluids than compressed air and combustible liquid, and also, that the
described mechanism can be made to operate other starting gear than the lift
valves a and b, provided such gear admits of the described action of the said
mechanism,

page_text: Furthermore, in place of the band wheel k¹ and its locking gear other suitable
means may be provided for preventing the spindle e from unintentional rotation.
Finally, the spindle e can also be so connected with other parts of the engine
such for instance as with the discharge valve gear, or with the petroleum pump
(if it is an oil engine) that on changing the action of the engine as above
described such other part of the engine is simultaneously put in or out of action
as may be required.
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:
1
Valve mechanism for gas and oil motor engines wherein a spindle such as e
actuated by a cam and lever such as C and dis 80 connected. to
the valve levers f and that by turning the spindle in one direction or
the other, the relative positions of the valves f and g are so varied relatively to
the lever d, that the one or the other admission valve is brought into action while
the second one remains inoperative, substantially as described.
Dated this 28th day of February 1900.
ABEL & IMRAY,
Agents for the Applicant.