Year: 1887

page_text: This Specification was, upon the 16th day of July 1890, Amended under
Sections 18 to 21 of the Patents, Designs, and Trade Marks Act, 1883.
1 FERDINAND BOSSHARDT, of the firm of F. Bosshardt & Co. Patent Agents, of
4 Corporation Street Manchester in the County of Lancaster, do hereby declare the
nature of this invention and in what manner the same is to be performed to be
particularly described & ascertained in and by the following statement:-
This invention relates to improvements in Letters Patent No. 5934, dated May 14th
1885 and has for its object to simplify the construction of valve gear described
therein and facilitate its application to different types of steam engines.
And in order that my invention may be better understood I have caused to be appended
hereunto four sheets of drawings marked with letters of reference indicating like parts
throughout the various figures."
Fig. 1 Sheet I. Fig. 3 Sheet II, Fig. 5, Sheet III, & Figs. 7 & 8 Sheet IV are side
elevations of the improved valve gear, and Figs. 2. Sheet I, 4. Sheet 1I, & 6.
Sheet III, side and front views partly in section of the inlet valve spindle, and parts
of mechanism connected therewith..
Referring to the first part of this invention and Fig. 1 Sheet 1 the motion of the
four rotary valves is obtained from the oscillating disc F, which receives motion either
directly or indirectly from the eccentric B mounted on the shaft A.
The two lower or outlet valves are securely connected to the disc F by means of
connecting rods and crank lever, while the upper or inlet valves are actuated by means
of the mechanism illustrated in Fig. 2 and particularly which is an improved construc-
tion of that described in Patent No. 5934, dated May 14th A.D. 1885, the engaging
piece of the latter ✓ being in connection with the governor for the purpose of
automatically regulating the admittance of steam by the following combination of
levers.
The lever N receives its motion from the eccentric rod D or other suitable
equivalent, and carries the three-armed regulating-lever Qwhich is connected with
the governor by means of the rod S, & by means of the rods T, T, with the engaging
pieces J. J.
By means of the oscillating dise F, the eccentric B sets the lever II in vibration,
and the lever N causes by means of three armed regulating lever Q. the-rods T, T,
and lever L, L, the engaging pieces J, J, to oscillate.
On the inlet valve spindle is keyed fast the crank lever K which is always pulled down-

page_text: wards in the direction of the arrow, by means of a weight spring or air piston G and
which in its lowest position retains the rotary valve closed.
The
The disc F by means of a rod, actuates the double lever H H, which turns on the bush
in which the valve spindle is mounted. The other arm of the double lever H. H carries a
stud, on which is arranged to oscillate the lever L formed with the engaging piece J.
free end of the latter is formed with a steel nose, and that of the lever L is furnished with
a stud which latter oscillates through the centre of the valve spindle. The free end of the
crank lever K, keyed fast on the valve spindle is also formed with a steel nose, which at
certain times is caught by the engaging piece J-and thereby effects the opening of the valve.
The position of the engaging piece J is attained by two motions which are independent
of each other.
On the one hand, its oscillation point is set in regular oscillation, by
means of the lever H. and disc F, and on the other hand its steel nose is moved to and fro
by means of the lever Land the rod T.
The hereinafter described system of levers effect the connection between the engaging
piece J and the governor of the engine for the purpose of automatically regulating the
admittance of steam.
In consequence of the two motions acting on the engaging pieces J, J, at different
times, the end of the same describes a curve, which according to the ascent of the
lever Q, which is under the control of the governor, either moves away from or nearer
to the centre of the valve spindle and slips consequently off the crank lever K, sooner
or later, thus reducing or increasing the admittance of steain.
Fig. 8. Sheet IV, shows the gear applied to a reversing engine.
According to the run of the engine, the rod D' is brought into connection with
one end of the link by means of an arrangement not shown here, while the lever N,
receives its motion from the centre of rotation of the link, which swings always
-uniformly.
Referring to the second part of this invention and to Sheets II & III, the same
purpose of admitting any desired volume of steam by rotary valve gears may be also
obtained by disengaging mechanism, the engaging pieces J, J, of which are caused to
snap in by reason of their own weight or by the action of a spring and being only
connected with the other mechanism at the moment of disengaging.
To admit any desired volume of steam above part of the stroke of the piston, the
action of two different and independent movements are required viz. an oscillating
around the valve spindle, and a radial movement.
While the oscillating motion as already named is imparted to the valve lever
by means of the disc F, the radial movement may act on the disengaging apparatus
in two different ways.
By forming the pin 1 and engaging piece J out of one piece, and actuating the
same so that it will swing in the centre of the valve spindle as shown in Fig. 4
Sheet II.
By suspending a lever M and causing the same to swing on the stud 2 in the
centre of the valve spindle and actuating the engaging piece radially by any
suitable means of connection (from the in or outside), see Fig. 6 Sheet III.
The production of this radial acting movement, which must cause sooner or later
the disengagement of the governor if under control of such, can also be obtained
besides the already mentioned arrangement by the following combination of levers
whereby the motion takes place either from a point of the eccentric rod as shown
previously, or from another source, may it be a counter crank, eccentric, or also a
piston rod, cross head or connecting rod.
The lever A, see Fig. 3. Sheet II. actuated in the manner as described above,
carries a three or four armed regulating lever B. The latter carries the regulating
rods C which slide in a bush D formed with a slot, and cause the disengagement
at a certain moment by means of the cottars E passing through the same.
The regulating lever B is brought by means of the rod S either under direct or
indirect control of the governor or may be adjustable by hand by means of the
rod S'.
The higher the governor rises or the shorter the rod S will be adjusted; the

page_text: sooner the cottar E will touch the slot of the bush D, and the sooner the disengage-
ment will take place, while on the return, the cottar E slides freely in the slot,
until the engagement piece J, snaps in for fresh play.
The crank K is formed as usual with an eye for the reception of a spring,
weight or air piston, for the purpose of closing the valve & and being disengaged.
The lever A (see Fig. 5 Sheet III,) actuated in the manner described imparts
the swinging motion by means of the rods C to the levers M. The point B², is
by hand or by means of the governor, either directly or indirectly adjusable so
that the lever M will always swing according to the position of the governor, to
the right of B2, left, or in the middle of the valve spindle.
The rod D which slides in an opening of the engaging piece J is formed with a
collar E' (see Fig. 6. Sheet II1).
The higher tho point B2 stands, the sooner the collar E' will meet the engaging
pieco J, and the sooner the disengagement takes place, while on the return, the rod D
slides freely in the opening of the engaging piece J.
The spring R causes the snapping in of the engaging piece J for fresh play.
Fig. 7 Sheet IV shows a gear which can be used for reversing engines.
The disc is connected with the link O by means of the rod G. The latter is
suspended on the point Q of the lever R and actuated by means of two eccentrics or
counter cranks which are keyed on respectively for the forward and backward
motion.
According to the manner of connection of the rod G with one end of the link, the
disc F will move in one or the other direction, while the lever A is moved from the
motion, remaining always at the centre of suspension of the link, which remains
always uniform.
Having now particularly described and ascertained the nature of this invention &
in what manner the same is to be performed I declare that what I claim, is :-
In engines with rotary valve gear, for the purpose of admitting any desired volume
of steam :-
1st. The swinging lever N (see Figs. 1 & 2 Sheet I) which imparts to the engaging
pieces J. J by means of the lever Q, and the rods,, TT'a variable, from the
governor, depending, motion thereby ensuring the variable admittance of steam, sub-
stantially as and for the purposes specified.
2nd. The application of such valve gear for reversing engine, (Fig. 8 Sheet IV),
whereby the lever N receives its motion from the centre g of suspension of the link.
3rd. The swinging lever A. (Fig. Sheet II), with its adjustable regulating lever BI
and rods C with their bushes D, and cottars E, in connection with a disengaging
mechanism, as described above.
4th. The swinging lever A, (Fig. 5 Sheet III), with the regulating rods C, the points
of connection B2 of which may be altered as desired in connection with a disengaging
mechanism, as described.
5th. The disengaging mechanism (Fig. 4 Sheet II), with point of connection,
swinging in the centre of the valve spindle, as described.
6th. The disengaging mechanism (Fig. 6 Sheet III.) with point of connection on
the periphery from the centre of the valve spindle as described.
7th. In reversing engines, the link O in connection with the mechanism specified in
Claims 3, 4, 5, & 6, whereby the suspended lever R of the link O, imparts the motion
necessary to the remaining mechanism, either directly or indirectly for the purpose of
admitting any desired volume of steam.

page_text: Date of Application, 27th Apr., 1887.
Specification Accepted, 7th June, 1887.
[Communicated from abroad by JOHANN RUDOLF FRIKART, of 122, Rue
Nationale, Lille, in the Republic of France, Engineer.]
Improvements in Valve Gear for Steam Engines.
I FERDINAND BOSSHARDT, of the firm of F. Bosshardt & Co. Patent Agents, of
4 Corporation Street Manchester in the County of Lancaster, do hereby declare the
nature of this invention and in what manner the same is to be performed to be
particularly described & ascertained in and by the following statement:-
This invention relates to improvements in Letters Patent No. 5934, dated May 14th
1885 and has for its object to simplify the construction of valve gear described
therein and facilitate its application to different types of steam engines.
And in order that my invention may be better understood I have caused to be appended
hereunto four sheets of drawings marked with letters of reference indicating like parts
throughout the various figures.
Fig. 1 Sheet I. Fig. 3 Sheet II, Fig. 5, Sheet III, & Figs. 7 & 8 Sheet IV are side
elevations of the improved valve gear, and Figs. 2. Sheet I, 4. Sheet II, & 6.
Sheet III, side and front views partly in section of the inlet valve spindle, and parts
of mechanism connected therewith.
Referring to the first part of this invention and Fig. 1 Sheet I the motion of the
four rotary valves is obtained from the oscillating disc F, which receives motion either
directly or indirectly from the eccentric B mounted on the shaft A.
The two lower or outlet valves are securely connected to the disc F by means of
connecting rods and crank lever, while the upper or inlet valves are actuated by means
of the mechanisin illustrated in Fig. 2 and particularly described in Patent No. 5934,
dated May 14th A.D. 1885, the engaging piece of the latter being in connection with
the governor for the purpose of automatically regulating the admittance of steam by
the following combination of levers.
The lever N receives its motion from the eccentric rod D or other suitable
equivalent, and carries the three-armed regulating-lever Q which is connected with
the governor by means of the rod S, & by means of the rods T, T, with the engaging
pieces J. I

page_text: By means of the oscillating disc F. the eccentric B sets the lever H in vibration,
and the lever N causes by means of three-armed regulating lever Q, the rods T, T,
and lever L, L, the engaging pieces J, J, to oscillate.
In consequence of the two motions acting on the engaging pieces J, J, at different
times, the end of the same describes a curve, which according to the ascent of the
lever Q, which is under the control of the governor, either moves away from or nearer
to the centre of the valve spindle and slips consequently off the crank lever K, sooner
or later, thus reducing or increasing the admittance of steam.
Fig. 8. Sheet IV, shows the gear applied to a reversing engine.
According to the run of the engine, the rod D' is brought into connection with
one end of the link by means of an arrangement not shown here, while the lever N,
receives its motion from the centre of rotation of the link, which swings always
uniformnly.
Referring the second part of this invention and to Sheets II & III, the same
purpose of admitting any desired volume of steam by rotary valve gears may be also
obtained by disengaging mechanism, the engaging pieces J, J, of which are caused to
snap in by reason of their own weight or by the action of a spring and being only
connected with the other mechanism at the moment of disengaging.
To admit any desired volume of steam above part of the stroke of the piston, the
action of two different and independent movements are required viz. an oscillating
around the valve spindle, and a radial movement.
While the oscillating motion as already named is imparted to the valve lever
by means of the disc F, the radial movement may act on the disengaging apparatus
in two different ways.
By forming the pin 1 and engaging piece J out of one piece, and actuating the
same so that it will swing in the centre of the valve spindle as shown in Fig. 4
Sheet II.
By suspending a lever M and causing the same to swing on the stud 2 in the
centre of the valve spindle and actuating the engaging piece J radially by any
suitable means of connection (from the in or outside), see Fig. 6 Sheet III.
The production of this radial acting movement, which must cause sooner or later
the disengagement of the governor if under control of such, can also be obtained
besides the already mentioned arrangement by the following combination of levers
whereby the motion takes place either from a point of the eccentric rod as shown
previously, or from another source, may it be a counter crank, eccentric, or also a
piston rod, cross head or connecting rod.
The lever A, see Fig. 3. Sheet II. actuated in the manner as described above,
carries a three or four armed regulating lever B. The latter carries the regulating
rods which slide in a bush D formed with a slot, and cause the disengagement
at a certain moment by means of the cottars E passing through the same.
The regulating lever B is brought by means of the rod S either under direct or
indirect control of the governor or may be adjustable by hand by means of the
rod S¹.
The higher the governor rises or the shorter the rod S¹ will be adjusted, the
sooner the cottar E will touch the slot of the bush D, and the sooner the disengage-
ment will take place, while on the return, the cottar E slides freely in the slot,
until the engagement piece J, snaps in for fresh play.
The crank K is formed as usual with an eye for the reception of a spring,
weight or air piston, for the purpose of closing the valve & and being disengaged.
is
The lever A (see Fig. 5 Sheet III,) actuated in the manner described imparts
the swinging motion by means of the rods C to the levers M. The point B2,
by hand or by means of the governor, either directly or indirectly adjustable so
that the lever M will always swing according to the position of the governor, to
the right of B, left, or in the middle of the valve spindle.
The rod D which slides in an opening of the engaging piece J is formed with a
collar E' (see Fig. 6. Sheet III).
.
The higher the point B² stands, the sooner the collar E¹ will meet the engaging

page_text: iece J, and the sooner the disengagement takes place, while on the return, the rod D
slides freely in the opening of the engaging piece J.
The spring R causes the snapping in of the engaging piece J for fresh play.
Fig. 7 Sheet IV shows a gear which can be used for reversing engines.
The disc F is connected with the link O by means of the rod G. The latter is
suspended on the point Q₁ of the lever R and actuated by means of two eccentrics or
counter cranks which are keyed on respectively for the forward and backward
motion.
According to the manner of connection of the rod G with one end of the link, the
dise F will move in one or the other direction, while the lever A is moved from the
motion, remaining always at the centre of suspension of the link, which remains
always uniform.
Having now particularly described and ascertained the nature of this invention &
in what manner the same is to be performed I declare that what I claim, is :-
In engines with rotary valve gear, for the purpose of admitting any desired volume
of steam :-
-
1st. The swinging lever N (Fig. 1 Sheet I) which imparts to the engaging
pieces J. J by means of the lever Q, and the rods I, I, a variable, from the governor,
depending, motion thereby ensuring the variable admittance of steam.
2nd. The application of such valve gear for reversing engine, (Fig. 8 Sheet IV),
whereby the lever N receives its motion from the centre g of suspension of the link.
3rd. The swinging lever A. (Fig. Sheet II), with its adjustable regulating lever Bl
and rods C with their bushes D, and cottars E, in connection with a disengaging
mechanism, as described above.
4th. The swinging lever A, Fig. 5 Sheet III, with the regulating rods C, the points
of connection B2 of which may be altered as desired in connection with a disengaging
mechanism, as described.
5th. The disengaging mechanism (Fig. 4 Sheet II), with point of connection,
swinging in the centre of the valve spindle, as described.
Gth, The disengaging mechanism (Fig. 6 Sheet III.) with point of connection on
the periphery from the centre of the valve spindle as described.
7th. In reversing engines, the link O in connection with the mechanism specified in
Claims 3, 4, 5, & 6, whereby the suspended lever R of the link O, imparts the motion
necessary to the remaining mechanism, either directly or indirectly for the purpose of
admitting any desired volume of steani.
1007