Improvements in or relating to Apparatus for Controlling the Valves of Engines.
Year: 1895

page_text: Date of Application, 19th Jan.. 1895
Complete Specification Left, 16th Oct., 1895-Accepted, 30th Nov., 1895
PROVISIONAL SPECIFICATION.
Improvements in or relating to Apparatus for Controlling the
Valves of Engines.
We, CARL AXEL HALLING, Merchant, of Nybrogatan 1, and JOHN TEODOR
LINDAHL, Engineer, of Brahegatan 2, both in Stockholm, in the Kingdom of
Sweden, do hereby declare the nature of this invention to be as follows :-
This invention relates to apparatus for controlling the valves of engines such
apparatus being applicable with particular advantage to the inlet and outlet valve
of gas and petroleum engines.
The mechanism in the example herein described is arranged so as normally to
open and shut the valve once during every second stroke of such an engine.
"
This
On the main shaft of the engine is applied a sliding ring having an " endless "
screw or figure-of-eight" groove and a cam on its circumference. A "fish-tail
or piece similar to a part of a screw thread engages with the groove.
"fish-tail" piece is by means of a pin pivotally connected to a fixed part of the
engine and is bent and tapered at its ends in such a manner that it may work in the
said groove. Finally a sliding bar rests on the ring by means of a roller and is
in connection with the valve to be opened and shut. As above mentioned the ring
may slide on the shaft; but it does not turn upon the shaft. Further, as the pin
is fixed and the fishtail piece engages the groove it is evident that the ring must
slide, so that it is farthest to say the right, every second stroke, and farthest to
the left every other stroke. This sliding corresponds to the distance between the
parts of the groove which run over the shaft at right angles and parallel with each
other. The situation of the cam with respect to the crossing point of the groove
is such that the sliding of the ring takes place while the cam is directed down-
wards or from the roller on the sliding bar so that the cam may come opposite the
roller when the ring slides towards the left side. The roller and the sliding bar
is then raised by the cam; this evidently occurs during every second stroke.
The regulating mechanism above described may advantageously also be used for
regulating the speed of the engine. The regulator itself is arranged in known
manner, and consists of a bell-crank lever, a second bell-crank lever fixed on the
first named bell-crank lever and controlled by a spring, and provided with a
counterweight, and of an arm arranged for engaging under a shoulder of sliding
bar before referred to, this arm being pressed outwards by a spring. According
to the speed with which the cam on the before mentioned sliding ring hits a roller
of the first named bell-crank lever, the second beli-crank lever hits or does not hit
the arm, so that the said arm is brought or is not brought in the path of the
shoulder on the sliding bar. The rollers on the sliding bar and on the first-named
bell-crank lever are straight behind each other, wherefore the cam acts on the roller
ou that bell-crank lever in the manner above described with regard to the roller
on the sliding rod. For the sliding rod may be substituted a lever and for the
bell-crank levers may be substituted sliding bars or other devices, for we do not
limit our invention to the particular arrangements set forth above by way of
example.
Dated this 10th dow of To 1905
BOULT & WADE,
Agents for the Applicants..

page_text: Improvements in or relating to Apparatus for Controlling the
Valves of Engines.
We, CARL AXEL HALLING Merchant of Nybrogatan 1, and JOHN TEODOR
LINDAHL, Engineer, of Brahegatan 2, both of Stockholm, Kingdom of Sweden
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 apparatus for controlling the valves of engines such
apparatus being applicable with particular advantage to the inlet and outlet valve
of gas and petroleum engines.
The mechanism in the example herein described is arranged so as normally to
open and shut the valve once during every second stroke of such an engine.
On the accompanying drawing Figure 1 shows an end view of the apparatus and'
Figure 2 a side view of the same.
endless
"
On the main shaft a of the engine is applied a sliding ring b having an
screw, or “ figure-of-eight" groove c and a cam d on its circumference. A "fish-
tail"
or piece similar to a part of a screw thread, engages with the groove c.
This
"fish-tail" piece f is by means of a pin g pivotally connected to a fixed
part H of the engine, and is bent and tapered at its ends in such a manner that it
may work in the said groove. Finally a sliding bar i rests on the ring b by means
of a roller h and is in connection with the valve to be opened and shut. As
above mentioned the ring may slide on the shaft; but it does not turn upon the
shaft, being prevented from doing so by the feather a. Further, as the ping is
fixed and the fish-tail piece f engages the groove c it is, evident that the ring must
slide, as the shaft a rotates so that it is farthest to, say, the right every second
revolution, and farthest to the left every other second revolution. This sliding
corresponds to the distance between the parts of the groove which run over the
The situation of
shaft at right angles. to its axis, and parallel with each other.
the cam & with respect to the crossing point of the groove is such, that the sliding
of the ring takes place while the cam is directed downwards or from the roller h
on the sliding bar so that the cam may come opposite the roller when the ring slides
towards one side. The roller and the sliding bar is then raised by the cam; this
evidently occurs during every second stroke.
The regulating mechanism above described may, advantageously also be used for
regulating the speed of the engine. The regulator itself is arranged in known
manner and consists of a bell crank lever k, a second bell crank lever 'n fixed on
the first-named bell crank lever k and controlled by a spring and provided with a
counterweight m, and of an arm s arranged for engaging under a shoulder p of the
sliding bar i before referred to this arm being pressed outwards by a spring r
According to the speed with which the cam d on the before mentioned sliding ring
hits a roller of the first named bell-crank lever k the second bell crank lever
hits or does not hit the arm s so that the said arm is brought or is not brought it
the path of the shoulder p on the sliding bar i. The rollers on the sliding bar and
on the first named bell-crank lever hand are straight behind each other, where
fore the cam d acts on the roller v on that bell crank lever in the manner abov
described with regard to the roller h on the sliding-rod. For the sliding rod maj
be substituted a lever and for the bell crank levers may be substituted sliding bar
or other devices, for we do not limit our invention to the particular arrangement
set forth above by way of example.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is.-
1. Mechanism for regulating the inlet and outlet valve of engines consisting of
a ring 6 mounted on shaft a of the engine so that it may slide and having a cam d
occupying only a part of the circumference of the ring and an 8-shaped groove c
the crossing point of which is situated on the opposite side of the ring relatively to
the cam d or nearly so and in which groove engages a piece f pivotally connected
to a fixed pin and of a sliding bar i lever or such like being in connection with the
valve and acted upon by the cam of the ring at every second revolution of the
shaft as the ring is alternately brought in the one or the other direction along
the shaft by the groove and the screw thread piece.
2. The regulating mechanism specified in the first claim in combination with a
speed regulator of a known construction and sensitive to the speed of the main
shaft substantially as herein before described.
3. The combination and arrangement of parts constituting a complete mechanism
for controlling the valve of an engine substantially as hereinbefore described and
illustrated in the accompanying drawings.
Dated this 16th day of October 1895.
BOULT & WADE,
Agents for the Applicants.