Improvements in or relating to Reversing and Controlling Mechanism for Engines.
Year: 1893

page_text: Date of Application, 7th July, 1893
Complete Specification Left, 9th Apr., 1894-Accepted, 7th July, 1894
PROVISIONAL SPECIFICATION.
Improvements in or relating to Reversing and Controlling
Mechanism for Engines.
We, JOHN BROKENSHIRE FURNEAUX of Victoria Works, Gateshead-on-Tyne,
in the County of Durham, Engineer, and EDWARD BUTLER of Windermere
Street, Gateshead-on-Tyne, aforesaid, Engineer, do hereby declare the nature of
this invention to be as follows:-
:-
In the Specification of former Letters Patent No. 9203 of 1889 there is described
a construction of reversing mechanism in which one or two of a nest of mitre toothed
wheels is or are mounted on the arm or arms of a frame or carrier free to revolve
around the ends of a motor or driving shaft and a propeller or driven shaft, one or
each of the said toothed wheels being arranged to gear with another toothed wheel
of the nest keyed to the motor shaft, and with another toothed wheel of the nest
keyed to the propeller shaft.
Now instead of employing cones for holding the said frame or carrier at rest for
rotating the driven shaft in an opposite direction to the driving shaft, and for
locking it with the driving shaft for transmitting motion in the same direction to
the driven shaft as described in the said former Specification, the following
construction is adopted.
Around the frame are placed two rings or annular bodies one of which is fixed,
it may be to the engine framing and the other of which is fixed to the driving shaft
and may advantageously form part of the flywheel of the engine.
On the ends of two of the arms of the revolving frame are mounted brake blocks
that are adapted to be forced outward by means of toothed nuts operated by racks
so as to become locked with the movable ring or fly wheel when it is desired to
rotate the driven shaft in the same direction as the driving shaft.
On two other arms of the frame are mounted similar brake blocks adapted to be
forced outward by other toothed nuts operated by racks so as to become locked
with the fixed ring when it is desired to rotate the driven shaft in an opposite
direction to the driving shaft. The movement of the racks to lock and unlock the
brake blocks is effected by a disc plate or equivalent device to which the racks are
connected, and which is mounted to slide upon a guide, which may be the driven
shaft, and is moved to and fro by a pair of lever arms, or a forked lever operated
by a reversing lever, the arrangement being such that when the said reversing lever
is moved into one of its extreme positions the frame will become locked with the
fly wheel and the driven shaft will rotate in the same direction as the driving shaft;
when the reversing lever is moved into its other extreme position the frame will be
locked to the fixed ring, and the driven shaft will rotate in the opposite direction to
the driving shaft; and when the reversing lever is moved into its mid position
both pairs of blocks will be disengaged from the fly wheel and fixed ring and the
driving shaft will be free to turn without operating the driven shaft.
In order to prevent racing of the engine when the driven shaft is placed out of
gear with the driving or motor shaft, that is to say when the reversing lever is
placed in its mid position the controlling valve of the engine has secured to its
spindle a lever that is suitably connected to another lever so constructed and
arranged that as the hand reversing lever is moved into its mid position, it, or a
projection thereon, will act upon and operate the said second lever and connected
parts, in such a manner as to partly close the controlling valve, and upon the said
reversing lever being moved in either direction from its mid position it will release
the said second lever and allow the controlling valve to be again opened by means

page_text: of a spring or otherwise. The said valve may be also provided with a hand lever
by which it can be opened and closed independently of the reversing lever. As will
be obvious controlling mechanism such as just described can be used with reversing
mechanism of various kinds.
Dated this 7th day of July 1893.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in or relating to Reversing and Controlling
Mechanism for Engines.
We, JOHN BROKENSHIRE FURNEAUX, of Victoria Works, Gateshead-on-Tyne,
in the County of Durham, Engineer, and EDWARD BUTLER, of Windermere
Street, Gateshead-on-Tyne, aforesaid, 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 :-
In the Specification of former Letters Patent No. 9203 of 1889 there is described
a construction of reversing mechanism in which one or two of a nest of mitre
toothed wheels is or are mounted on the arm or arms of a frame or carrier free to
revolve around the ends of a motor or driving shaft and a propeller or driven shaft,
the said toothed wheel or each of them (if more than one) being arranged in gear
with the other wheels of the nest, namely with a toothed wheel keyed to the motor
shaft and with another keyed to the propeller shaft.
Now instead of employing cones for holding the said frame or carrier at rest for
rotating the driven shaft in an opposite direction to the driving shaft, and for
locking it with the driving shaft for transmitting motion in the same direction to
the driven shaft, as described in the said former Specification, the following
construction is adopted.
Around the frame are placed two rings or annular bodies, one of which is fixed.
it may be to the engine framing, and the other of which is fixed to the driving
shaft, and may advantageously form part of the fly wheel of the engine.
On the ends of two of the arms of the revolving frame are mounted brake
blocks that are adapted to be forced outward by means of toothed nuts operated
by racks so as to become locked with the movable ring or fly wheel when it is
desired to rotate the driven shaft in the same direction as the driving shaft.
On two other arms of the frame are mounted similar brake blocks adapted to be
forced outward by other toothed nuts operated by racks so as to become locked
with the fixed ring when it is desired to rotate the driven shaft in an opposite
direction to the driving shaft. The movement of the racks to lock and unlock the
brake blocks is effected by a disc plate or equivalent device to which the racks are
connected, and which is mounted to slide upon a guide, which may be the driven
shaft, and is moved to and fro by a pair of lever arms or a forked lever operated by
a reversing lever, the arrangement being such that when the said reversing lever is
moved into one of its extreme positions the frame will become locked with the fly
wheel and the driven shaft will rotate in the same direction as the driving shaft ;
when the reversing lever is moved into its other extreme position the frame will be
locked to the fixed ring, and the driven shaft will rotate in the opposite direction
to the driving shaft; and when the reversing lever is moved into its mid position
both pairs of blocks will be disengaged from the fly wheel and fixed ring and the
driving shaft will be free to turn without operating the driven shaft.
In order to prevent racing of the engine when the driven shaft is placed out of
gear with the driving or motor shaft, that is to say, when the reversing lever is

page_text: placed in its mid position the controlling valve of the engine has secured to its
spindle a lever that is suitably connected to another lever so constructed and
arranged that as the hand reversing lever is moved into its mid position, it, or a
projection thercon, will act upon and operate the said second lever and connected
parts, in such a manner as to partly close the controlling valve, and upon the said
reversing lever being moved in either direction from its mid position it will release
the said second lever and allow the controlling valve to be again opened by means
of a spring or otherwise. The said valve may be also provided with a hand lever
by which it can be opened and closed independently of the reversing lever. As
will be obvious controlling mechanism such as just described can be used with
reversing mechanism of various kinds.
In the accompanying drawings,
Fig. 1 shows part of an engine having reversing mechanism according to this
invention, which is represented in vertical section,
Fig. 2 shews the reversing mechanism in horizontal section.
Fig. 3 shews a cross section, partly in end elevation;
Fig. 4, shews partly in side elevation, and partly in longitudinal vertical section,
portions of an engine with reversing and controlling mechanism according to this
invention.
Fig. 5 shews an end elevation and
Fig. 6 shews the controlling mechanism in plan.
In the arrangement illustrated, G is a circular ring forming part of the frame F
and bored in line with the inner rim of the fly wheel W. On the arms A¹ A² of
the four-armed revolving frame A1, A2, A3, A are mounted two brake blocks B¹
and B2 (Fig. 1) which are locked against the inner rim of the fly wheel W by the
nuts P1 P2 toothed to engage with the racks R1 R2 when it is desired to rotate the
driven shaft S2 in the same direction as the motor shafts S¹. On the other
arms A A are two other blocks B3 B4 (Fig. 2) which are locked against the inner
rim of the ring G by the nuts P³ P toothed to engage with the racks R3 R4 when
it is desired to cause rotation of the driven shaft in an opposite direction to that of
the motor shaft; the locking and unlocking of the brake blocks is effected by
sliding or shifting the disc D carrying the four racks R' R2 R3 R4; when the disc
is moved to the position indicated in Fig. 1, the blocks B1 B2 are pressed against
the fly wheel W and when moved to the position shewn in Fig. 2 the other
blocks B B are pressed against the ring G.
When in the mid position represented in Fig. 3, both pairs of blocks are out of
contact and the motor shaft is then free to turn without the driven shaft.
L' represents the reversing hand lever operating a weigh shaft Y with short
levers K K engaging with clutch C.
O is an oil supply tank mounted on the frame F. T is the thrust bearing of the
propeller shaft.
E is the engine; ✗ the exhaust pipe from the engine.
We will now describe the arrangement illustrated for preventing racing of the
engine on the driven shaft being placed out of gear with the motor shaft (that is to
say) when the disc D and lever L' are in mid position.
Referring to Figs. 4, 5 and 6, R is the controlling valve, L³ a lever attached to
the valve spindle, L' a lever fulcrummed to the top of the oil tank, b is a button
attached to the hand reversing lever L'. T' is a rod connecting the ends of the
two levers L L³. The cam shaped end of the lever L2 is adapted to engage with
the roller or button B when the lever L' is in mid position the valve lever L³
being then moved over towards the right (Figs. 5 and 6) thus partly closing the
regulator R. On the reversing lever L' being moved to place the driven shaft in
gear with the motor shaft, in either direction, the button 6 will be free from the
cam shaped end of the lever L2 and by means of a spring S (Fig. 4) the valve
will be opened again; H is the handle of the hand adjusting arrangement. Qis a
quadrant with stops, to hold the reversing lever in either ahead, astern or mid
position. O is the oil tank, the exhaust pipe, I the casing of an inspirator such

page_text: as described in the Specification No. 6990 of 1890, S1, S2, are supply pipes from
the inspirator to the valves V1, V2 of the engine E.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. In reversing mechanism of the kind herein referred to, the combination with
the toothed wheel or wheels carried by a rotary frame and gearing with toothed
wheels fixed on the driving and driven shafts respectively, of a fixed ring, rim or
annular body, a ring, rim, or annular body fast on the driving shaft, brake blocks
carried by the rotary frame and means whereby when required they can be caused
to press against the fixed ring, rim or annular body, and other brake blocks also
carried by the rotary frame and means whereby, when required they can be caused
to press against the ring, rim or annular body on the driving shaft substantially
as described for the purpose specified.
2. In a motor, a ring, rim or annular body attached to the motor shaft, a fixed
ring, rim or annular body attached to the motor frame, a revolving frame pivoted
on the motor shaft, driving wheels and brake or locking gear constructed arranged
and operating substantially as described with reference to the accompanying
illustrative drawings, for the purpose specified.
3. In a motor adapted to admit of frequent disconnection of the motor shaft
from the driven shaft as by means of a reversing gear as set forth, the arrange-
ment substantially as hereinabove described with reference to and shewn in the
drawings of levers in connection with the regulator valve of the engine to
prevent racing.
Dated this 9th day of April 1894.
For the Applicants,
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.