Valve Gear.
Year: 1899

page_text: Date of Application, 23rd May, 1899
Complete Specification Left, 22nd Feb., 1900-Accepted, 7th Apr., 1900
Valve Gear.
I, HUGO LENTZ, Mechanical Engineer, of 14, Gomperzgasse, Bruenn, in the
Empire of Austria, do hereby declare the nature of this invention to be as
follows:
My invention relates to a novel valve gear which works the inlet and exhaust
valves of an engine in a very precise and simple manner, and refers particularly
to the class of puppet valve engines.
This new gear, in comparison with others heretofore used, is simple in con-
struction, noiseless in action, insures safety and economy, has a great regulating
efficiency, and allows high speed.
In the accompanying drawings illustrating my invention Fig. 1 shows a
vertical section of my valve gear taken on line 1-1 of Fig. 2.
Fig. 2 is an elevation of the same partly in section.
Figs. 3 and 4 show a modified arrangement for changing the lead and throw
of the inlet eccentric.
Figs. 5 and 6 show a modified form of my valve gear adapted to vertical engines.
Referring to said drawings, A is a shaft geared to the main shaft of the
engine. With this shaft the eccentrics B B, which move the admission valves,
and C C, which move the exhaust valves of the engine, are connected. The
eccentrics CC for the exhaust valves are fastened rigidly to shaft A by wedges,
screws or similar means, whilst the eccentrics B B for the admission valves
move on slides D D firmly fixed to shaft A, and are controlled by a speed
regulator. The regulator I is fixed to shaft A and placed between the two inlet
eccentrics. This regulator, which is described in the Specification of Letters
Patent No. 11,671 of the year 1898, consists of two separate parts, viz:-a bearing
secured to shaft A, and an inertia ring supported on the shaft to rotate inde-
pendently of the bearing and connected to the same by springs. This inertia
ring has its sleeves H extended to the inlet eccentrics and can be connected
with the same in a very simple manner.
The connection of these eccentrics B B with the regulator can be made in
several ways. For instance, as shown in Figs. 1 and 2, the eccentric B has a
slot E in which a block F slides. This block carries a pin G, which is connected
to the sleeve H of the inertia disc of the regulator I, which inertia disc shifts the
eccentric B on the slide D, thereby changing lead and throw. Or as shown
in Figs. 3 and 4, in place of the block F, I may use a link F1, which is fastened
to the eccentric B by bolt G¹, and to sleeve H of the inertia disc of the shaft
regulator by bolt G².
The slide D is fastened to shaft A in such a manner that, at the moment
when the inlet valve J is opened by the eccentric B, where the resistance is
the greatest, the eccentric rod K stands vertical to this slide D, as shown in
Fig. 1, and therefore the reaction from the inlet valve is effected in a direction
vertical to slide D and is obviously entirely taken up by the same.
The eccentrics carry, in a well known manner, the eccentric strans, to which

page_text: are connected the eccentric rods K, for the admission valves, and L, for the
exhaust valves.
A lever cam plate M is fulcrummed in stand N on bolt O, and it is connected to
rod K by bolt P, receiving an oscillating or rocking motion from said rod K.
From this lever cam plate M the admission valve J receives its motion in the
following manner. The valve rod Q, to which the admission valve is fastened,
carries a cylindrical shaped hollow box R. Said box, which is guided in stand N,
carries a roller S and is forced down by spring T, thereby bringing the roller S
in contact with the curved or cam face U U₁ of plate M. This curved cam
face of plate M consists of rise U and fall U₁, forming circular ares whose centre
is bolt O. As long as this roller S rests on the falls U₁ of plate M, the admission
valve is closed, but as soon as this plate turns to the left, rise U comes in contact
with the roller S, the latter, and with it box R and rod Q, are lifted, thereby
Box R has slots V for the lever cam
raising the admission valve J from its seat.
plate M to enter. In place of the roller S a stud may be used. Rise U has such
a form as to ensure a smooth and sudden seating of the admission valve.
Similar mechanism to that above explained is used for opening and closing the
exhaust valves. Eccentric rod L imparts motion to the lever cam plate M¹,
thereby opening and closing the exhaust valve (not shown) which is fastened to
valve rod Q
Figs. 5 and 6 show a form of my new valve gear adapted to vertical engines.
In this class of engines each lever cam plate can control two admission or two
exhaust valves. Eccentric rod K, lever cam plate M with rises U U, and
rollers S S, work the admission valves; eccentric rod L, lever cam plate M¹ with
rises U2 U2, and rollers S¹ St, work the exhaust valves. In this way each lever
cam plate obviously controls two valves.
1 0911w of Wa 1900
HARRIS & MILLS,
23, Southampton Buildings, London, W.C., Agents.
I, HUGO LENTZ, Mechanical Engineer, of 14 Gomperzgasse, Bruenn in the Empire
of Austria, 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 novel valve gear which works the inlet and exhaust
valves of an engine in a very precise and simple manner, and refers particularly
to the class of puppet valve engines.
This new gear, in comparison with others heretofore used, is simple in con-
struction, noiseless in action, insures safety and economy, has a great regulating
efficiency and allows high speed.
In the drawings illustrating my invention filed with my Provisional Specifica-
tion, Fig. 1 shows a vertical section of my valve gear taken on line 1-1 of Fig. 2.
Fig. 2 is an elevation of the same partly in section.
Figs. 3 and 4 show an arrangement for changing the lead and throw of the
inlet eccentric.
Figs. 5 and 6 show a modified form of my valve gear adapted to vertical
engines.
Referring to said drawings, A is a shaft geared to the main shaft of the engine.

page_text: With this shaft the eccentrics B, B, which move the admission valves, and C, C,
which move the exhaust valves of the engine are connected.
The eccentrics C, C, for the exhaust valves are fastened rigidly to shaft A by
wedges, screws or similar means, whilst the eccentrics B B for the admission
valves move on slides D D firmly fixed to shaft A, and are controlled by a
speed regulator. The regulator I is fixed to shaft A and placed between the
two inlet eccentrics. This regulator which is described in the Specification of
Letters Patent No. 11,671 of the year 1898, consists of two separate parts, viz;—
a bearing secured to shaft A, and an inertia ring supported on the shaft to
rotate independently of the bearing and connected to the same by springs.
This inertia ring has its sleeves H extended to the inlet eccentrics and can be
connected with the same in a very simple manner.
The connection of these eccentrics B B with the regulator can be made in
several ways. For instance, as shown in Figs. 1 and 2, the eccentric B has
a slot E in which a block F slides. This block carries a pin G, which is connected
to the sleeve H of the inertia disc of the regulator I, which inertia disc shifts
the eccentric B on the slide D, thereby changing lead and throw.. Or, as shown in
Figs. 3 and 4, in place of the block F, I may use a link F¹, which is fastened to
the eccentric B by bolt G¹, and to sleeve H of the inertia disc of the shaft regulator
by bolt G.
The slide D is fastened to shaft A in such a manner that, at the moment when.
the inlet valve J is opened by the eccentric B, where the resistance is the greatest,
the eccentric rod K stands vertical or nearly vertical to this slide D, as shown in
Fig. 1, and therefore the reaction from the inlet valve is effected in a direction
vertical to slide D and is obviously entirely taken up by the same.
The eccentrics carry, in a well known manner, the eccentric straps, to which
are connected the eccentric rods K, for the admission valves and L, for the
exhaust valves.
A lever cam plate M is fulcrummed in stand N on bolt O, and it is connected to
rod K by bolt P, receiving an oscillating or rocking motion from said rod K.
From this lever cam plate M the admission valve J receives its motion in the
following manner. The valve rod Q, to which the admission valve is fastened,
carries a cylindrical shaped hollow box R. Said box, which is guided in stand N,
carries a roller S and is forced down by spring T, thereby bringing the roller S
in contact with the curved or cam face U U₁ of plate M.
This curved cam face of plate M consists of the rise U and fall U₁ whose
centre is preferably bolt 0 or a point somewhere between centres O and S. As
long as roller S rests upon the fall U₁ of said cam M the valve J is closed, but as
soon as said cam turns so as to bring rise U into contact with said roller S, the
O latter and with it the box R, rod Q and valve J are forced in a direction to
open the latter. Said box R is provided with slots V for the lever cam plate M
to enter.
As spring T acts to force roller S down upon cam M, this roller and with it
valve J must obviously always follow the movement of the curved cam face of
plate M the velocity of the seating depending on the form of thumb U.
Said thumb or rise U is so formed as to insure sudden and smooth or noiseless
seating of the admission valve.
A stud may obviously be substituted for the roller S.
Similar mechanism to that above explained may be used for opening and
0 closing the exhaust valves. Eccentric rod L imparts motion to the lever cam
plate M, thereby opening the exhaust valve (not shown) which is fastened to
valve rod Q', whilst the closing of the same is effected by a spring.
Figures 5 and 6 show a form of my new valve gear adapted to vertical engines.
In this class of engines each lever cam plate can control two admission or two
5 exhaust valves. Eccentric rod K, lever cam plate M with rises U U, and
rollers S, S, work the admission valves, eccentric rod L, lever cam plate M¹
with rises U2, U2, and rollers S¹ S¹, work the exhaust valves.

page_text: In this way each lever cam plate obviously controls two valves.
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. In an engine a valve opened by a rocking cam plate acted upon directly
by an eccentric rod or some other rod which receives its motion from a rotating
shaft of the engine said cam plate also controlling the seating of the valve, the
latter being closed by a spring.
2. In an engine valve acted upon in the manner set forth in Claim 1, a
rocking cam plate pivotally mounted on rigid parts of the engine and engaging
the stem of the valve in the centre line of the same.
3. In an engine, a valve acted upon by a rocking cam plate, the latter consist-
ing of a rise and a fall said cam plate receiving its motion from a revoluble member
of the engine, a roller or stud fastened to the valve stem and a spring forcing this
roller or stud down upon the eam to close the valve.
4. In a puppet valve engine, a box fastened to the valve or valves, a stud or
roller in said box, a rocking cam plate entering said box and pushing against
the roller or stud, an eccentric rod fulcrummed to said cam plate, a spring forcing.
said box upon the cam and a shaft giving motion to the eccentric.
5. In a puppet valve engine a regulating device for the inlet valves consisting
of slides fastened to the regulator shaft on which the eccentrics for the inlet valves
are shifted and controlled by a speed regulator thereby changing lead and throw.
6. In a regulating mechanism for engines as set forth in Claim 5, a slide
for the inlet eccentric said slide being fastened in such a manner to the regulator
shaft that at the moment when the inlet valve is opened by said eccentric, the
eccentric rod stands vertical or nearly vertical to this slide.
7. In a regulating device for engines as set forth in Claim 5, the connection
of the inlet eccentrics with the speed regulator consisting of a block sliding
in a slot of said eccentric and carrying a pin which is connected to the inertia
disc of said regulator.
8. In a regulating mechanism for engines the connection of the inlet eccen-
trics with the speed regulator consisting of a link fastened to the eccentric by
a pin or bolt and to the inertia disc of the shaft regulator by another pin or bolt.
9. In a valve gear as set forth in Claims 1, 2, 3 and 4, a cam plate having
two rises and two falls for the purpose of controlling two valves with one cam
plate.
Dated this 22nd Wahr 1000
HARRIS & MILLS,
23, Southampton Buildings, London, W.C., Agents.