An Improved Compressed Air Reversing Gear, applicable also as an Adjusting Device.
Year: 1896

page_text: Date of Application, 21th Apr., 1896
Complete Specification Left, 29th Oct., 1896-Accented, 30th Jan., 1897
PROVISIONAL SPECIFICATION.
An Improved Compressed Air Reversing Gear, applicable also as an
Adjusting Device.
A communication by HEINRICH BRINKMANN, of 12 Wörthstrasse, Munich, in
the Empire of Germany, Merchant.
I, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E., of The Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool, and 6, Bank Street,
Manchester, both, in the County of Lancaster, 118 New Street, Birmingham in
the County of Warwick and 322 High Holborn in the County of Middlesox,
Civil Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention has for its object a device for fixing a point (for instance of
mechanical movement) on reversing machines in various positions. As, such there
come into consideration the machines or devices for reversing, feathering or
adjusting the blades of ships' propellers, reversing gear of ships, engines, and
general reversing machines of the must varied kind, such for instance as lifts and
elevators for mines and blast furnaces, engines for rolling mills and steam and street
rollers, steam and hydraulic cranes and the like.
This improved device consists essentially of two air pressure cylinders, the piston
rods of which are connected to connecting rods, the free ends of which latter carry
a balance or beam on which the point to be adjusted lies directly, or which may carry
the point along, a guide rod.
Д
The air supply passages or ports of the two compressed air cylinders open, into
single slide box, and both compressed air cylinders are fed by a single slide valve,
for the movement of which latter a single hand lever is sufficient. Each cylinder
may, however, be provided with a separate slide valve.
If the slide valve be in its middle position, the beam lies in an oblique position.
The point is then also in its middle position. On the commencement of this valve
adjustment, the compressed air passes through certain valve ports into the cylinders
and produces, as stated, the middle position of the beam.
If the slide valve be moved to the right by means of the reversing lover, the
cylinder piston moves, in consequence of the inflow of pressure into another valve-
port as well as the escape of pressure through another valve-port, and thoreby
produces the outermost position of the.beam.
As may be easily seen, on the reversal of the apparatus by means of the valve
in the opposite direction, the middle position is again assumel, that is to say, the
oblique or middle position of the beam or in other words, of the point, and if the
slide be further moved to the left, the pressure increases in one valve-port whilst
the pressure on the piston escapes, and the cylinder remains under pressure by
means of the other port, which produces the innermost position of the beam.
In this manner any machine part connected with the point may be. adjusted or
fixed in a suitable manner.
If the point on the beam be placed outside both cylinders instead of between
the same, four different positions of said point result. If the point be in the outer-
nost position, by a suitable pressure on one of the two ends of the loam, by

page_text: means of a screw with a hand-wheel (even if the point he between the two
cylindera) intermediate positions of said point inay be produced. The screw
may be pivoted and thus swing down when not in nse, when the cylinders are
stationary.
The inventor desires also to bring into combination with the two cylinders
and the beam, one or more cylinders or beams, in order, in case of need, to be
able to fix the adjustable point, in various intermediate positions in addition to the
positions given, which otherwise would not be possible with the arrangement
described.
Dated this 23rd dox of Anril 1808
WM. P. THOMPSON & Co.,
Agents
An Improved Compressed Air Reversing Gear, applicable also as an
Adjusting Device.
A communication by HEINRICH BRINKMANN, of 12 Wörthstrasse, Munich, in the
Empire of Germany, Merchant.
I, WILLIAM PHILLIPS THOMPSON F.C.S. M.I.M.E. of The Agency for
Foreign Patent Solicitors 6 Lord Street, Liverpool, and 6 Bank Street,
Manchester, both in the County of Lancaster, 118 New Street, Birmingham in
the County of Warwick and 322 High Holborn in the County of Middlesex,
Civil 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 :-
This invention has for its object a device for fixing a point (for instance of
mechanical movement) on reversing machines in various positions. As such thore
come into consideration the machines or devices for reversing feathering or adjusting
the blades of ships' propellers, revorsing gear of ships' engines, and general reversing
machines of the most varied kind, auch for instance as lifts and elevators for mines
and blast furnaces, engines for rolling mills and steam and street rollers, steam and
hydraulic cranes and the like.
In the accompanying drawings,-
Figure 1 is a plan viow of the arrangement,
Figure 2 a detail view,
Figure 3 a detail view of the parts, and
Figure 4 a side view of the piston and cylinder.
This improved device consists essentially of two air pressure cylinders cc', the
piston rods of which are connected to connecting rods b, the free ends of which
latter carry a balance or beam k on which the point to be adjusted lies directly, or
which may carry the point along a guide rod g.
The air supply passages or ports of the two compressed air cylinders open, in the
form of construction shown, into a single slide box, and both compressed air
cylinders are fed by a single slido valve o, for the movement of which latter a
single band lever is sufficient. Each cylinder may, however, be provided with a
separate slide valve.
If the slide valve o be in its middle position, as shown in Figure 2, the beam k
lies in an oblique position, as shown in dotted lines in Figure 1. The point p is
then also in its middle position. On the commencement of this valve adjustnient,
the compressed air passes through the valve ports a° and 6° into the cylinders c and

page_text: produces, as stated, the middle position m³n, of the beam k, shown in dotted lines
in Figure 1.
If the slide valve be moved to the right, that is towards 2, Figure 2, by means of
the reversing lever, the cylinder piston moves, in consequence of the inflow of
pressure into another valve-port co as well as the escape of pressure through
another valve-port do, and thereby produces the outermost position of the beam k,
as shown in dotted lines at m', n' in Figure 1.
As may be easily seen, on the reversal of the apparatus by means of the valve o
in the opposite direction, the middle position is again assumed, that is to say, the
oblique or middle position m n of the beam k or in other words, of the point p,
and if the slide be further moved to the left towards v, the pressure increases in
one valve-port whilst the pressure on the piston escapes at aº, and the
cylinder o remains under pressure by means of the other port 60, which produces
the innermost position of the beam k as shown in full lines at m, n of Figure 1.
In this manner any machine part connected with the point p may be adjusted or
fixed in a suitable manner.
If the point p on the beam k be placed outside both cylinders instead of between
the same, four different positions of said point result. If the point p be in the
outermost position, as shown in dotted lines by a suitable pressure on one of the
two ends m', ' of the beam, by means of a screw with a hand-wheel (even if
the point be between the two cylinders) intermediate positions of said point p may
be produced. The screw j may he pivoted at i and thus swing down when not in
use, when the cylinders are stationary.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manuer the same is to be performed, as communicated to me by
my foreign correspondent, I declare that what I claim is,―
1. A device for fixing a point in several positions, characterized by the said
point being arranged on a beau of which two other points may be displaced or
adjusted into two outermost positions by means of pistons adjustable in cylinders, in
which positions they are retained by the action of the pressure existing in the
cylinders, substantially as described.
2. The general construction and combination of parts taken as a whole forming
the improved compressed air reversing gear, applicable also as an adjusting device,
substantially as hereiubefore described and illustrated.
Dated this 28th day of October 1896.
WM. P. THOMPSON & Co.,
Agents.