New or Improved Mechanism for Reversing and Stopping Oil, Gas, or other Motor Driven Machinery or Apparatus
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
New or Improved Mechanism for Reversing and Stopping Oil, Gas,
or other Motor Driven Machinery or Apparatus.
We, TANGYES LIMITED, of Cornwall Works Soho, in the County of Stafford
Engineers and JAMES ROBSON, the younger, of No. 48 Linwood Road Handsworth,
in the County of Stafford Mechanical Engineer do hereby declare the nature of this
invention to be as follows:-
The said invention relates to reversing and stopping mechanism for machinery or
apparatus driven by an oil, gas or other engine or motor running continuously in
one direction, the object of the said invention being to enable the said machinery
when running in the same direction as the motor to be readily and quickly reversed
without reversing the engine or to be thrown out of gear with the engine. The said
invention has the further advantages that the speed of the machinery may be reduced
without reducing the speed of the engine and there is little or no noise or vibration
produced when the machinery is running in the same direction as the engine.
The said invention is especially applicable to the propeller shafts of launches
driven by an oil or other motor and we will describe it in connection with the
propeller shaft of a launch driven by an oil motor.
We arrange the motor and propeller shafts in line and on and near the adjacent
ends of the said shafts we fix bevil wheels. On one of the said shafts and between
the bevil wheels described we arrange a loose bush or collar from opposite sides of
which radiate spindles or axes carrying bevil pinions the teeth of which engage with
the teeth of the bevil wheels on the notor and propeller shafts respectively. On the
bevil wheels on the motor and propeller shafts are flanges the edges of which are
presented to each other and concentric with the said flanges is an outer fixed ring.
Between the flanges on the bevil wheels and the outer fixed ring is a friction ring
made in halves capable of being separated or drawn together by screw pins the
opposite ends of which are screwed with right and left hand screw threads respectively,
the ends of the said screw pins engaging in correspondingly screwed nuts carried by
the parts of the half rings presented to each other. When the two half rings are
drawn together the inner side of the friction ring is concentric with the flanges of
the bevil wheels on the motor and propeller shafts respectively and the said friction
ring grips the said flanges with such firmness that they are locked and rotate in the
same direction; but when the said half rings are separated to their fullest extent
the outer side of the friction ring is concentric with the fixed ring and bears against the
inner side of the said fixed ring with such force as to prevent the rotation of the
friction ring. The bevil wheels on the motor and propeller shafts respectively
consequently gear with one another through the bevil pinions on the cross spindle,
the outer ends of which engage in holes or depressions in the opposite half rings. The
motor shaft thereby drives the propeller shaft through the said gearing and con-
sequently the propeller shaft rotates in an opposite direction to the motor shaft.
When the half rings are in a mid-way position they are free to rotate without
transmitting motion to the propeller shaft.
The inner or outer sides of the half rings may be made to bear with such pressure
on the flanges of the bevil wheels or on the inner side of the fixed ring respectively
as to drive the propeller shaft in the same or in an opposite direction but at a reduced
maad

page_text: The screw pins for drawing together or separating the two half rings are turned
by the operation of a hand lever through a sliding sleeve on the motor or propeller
shaft and suitable connecting links and levers.
We wish it to be understood that we do not limit ourselves to the exact construction
described of the reversing and stopping mechanism as the details may be modified to
suit the kind of machinery to which it is to be applied, without departing from the
essence or nature of the said invention.
Dated this Eighteenth day of May 1896.
W. T. WHITEMAN,
Agent for the Applicant.
New or Improved Mechanism for Reversing and Stopping Oil, Gas,.
or other Motor Driven Machinery or Apparatus.
We TANGYES LIMITED, of Cornwall Works, Soho, in the County of Stafford,
Engineers and JAMES ROBSON, the younger, of No. 48 Linwood Road, Handsworth,
in the County of Stafford, Mechanical Engineer, do hereby declare the nature of the said
invention and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement :-
The said invention relates to reversing and stopping mechanism for machinery or
apparatus driven by an oil, gas or other engine or motor running continuously in
one direction, the object of the said invention being to enable the said machinery,
when running in the same direction as the motor, to be readily and quickly reversed
without reversing the engine, or to be thrown out of gear with the engine. The said
invention has the further advantages that the speed of the machinery may be reduced
without reducing the speed of the engine and there is little or no noise or vibration
produced when the machinery is running in the same direction as the engine.
The said invention is especially applicable to the propeller shafts of launches driven
by oil or other motors and we will describe it in connection with the propeller shaft
of a launch driven by an oil motor.
We arrange the motor and propeller shafts in line and on and near the adjacent
ends of the said shafts we fix bevel wheels. On one of the said shafts and between
the bevel wheels described we arrange a loose bush or collar from opposite sides of
which radiate spindles or axes carrying bevel pinions the teeth of which engage with
the teeth of the bevel wheels on the motor and propeller shafts respectively. On the
bevel wheels on the motor and propeller shafts are flanges the edges of which are
presented to each other and concentric with the said flanges is an outer fixed ring.
Between the flanges on the bevel wheels and the outer fixed ring is a friction ring
made in halves capable of being separated or drawn together by screw pins the
opposite ends of which are screwed with right and left hand screw threads respectively,
the ends of the said screw pins engaging in correspondingly screwed nuts carried by
the parts of the half rings presented to each other. When the two half rings are
drawn together the inner side of the friction ring is concentric with the flanges of the
bevel wheels on the motor and propeller shafts respectively and the said friction ring
grips the said flanges with such firmness that they are locked and rotate in the same
direction but when the said half rings are separated to their fullest extent the outer
side of the friction ring is concentric with the fixed ring and bears against the inner
side of the said fixed ring with such force as to prevent the rotation of the friction
ring. The bevel wheels on the motor and propeller shafts respectively consequently
gear with one another through the bevel pinions on the cross spindle, the outer. ends:
of which engage in holes or depressions in the opposite half rings. The motor shaft

page_text: thereby drives the propeller shaft through the said gearing and consequently the
propeller shaft rotates in an opposite direction to the motor shaft. When the half
rings are in a mid-way position they are free to rotate without transmitting motion
to the propeller shaft.
The inner or outer sides of the half rings may be made to bear with such pressure
on the flanges of the bevel wheels, or on the inner side of the fixed ring respectively
as to drive the propeller shaft in the same or in an opposite direction but at a reduced
speed.
The screw pins for drawing together or separating the two half rings are turned by
the operation of a hand lever through a sliding sleeve on the motor or propeller shaft
and suitable connecting links and levers.
Figure 1 of the accompanying drawings represents in elevation the reversing and
stopping mechanism constituting the said invention shown in connection with the
propeller shaft of a launch driven by an oil motor: Figure 2 represents the said
mechanism partly in end elevation and partly in vertical section and Figures 3 and 4
represent sections of the same taken respectively on the lines, and y, y Figure 2.
Figures 2. 3, and 4 are drawn to a larger scale than Figure 1.
The same letters of reference indicate the same parts in the several figures of the
drawings.
A and B are the motor and propeller shafts respectively. On and near the end
of the motor shaft A we fix the bevel wheel a carrying the flanged disc a', a' and on
the end of the propeller shaft B we fix the bevel wheel b carrying the flanged disc b1, b2
the said hevel wheels a, b and flanges a, & of the flanged di-cs a, a, being
presented to each other. On the reduced end A' of the motor shaft A we arrange a
foose collar c having at opposite sides radial arms c², which constitute spindles on
which bevel pinions d, d gearing with the bevel wheels a, b are capable of rotating.
Concentric with and surrounding the flanges a2, 2 of the flanged discs a', a², b', b² is
a fixed ringe and between the said fixed ring and the said flanges a, & is a divided
friction ring f. made preferably in two parts (see Figure 2) capable of being
separated and drawn together in the manner hereinafter particularly described. The
free ends of the radial arms or spindles c2, c2 take a bearing in opposite holes or
depressions g¹, 2 in the inner face of the half rings f, 2. When the two
halves, of the friction ring are separated their outer surfaces are forced into
more or less intimate contact with the surface of the fixed ring e and when the said
halves are drawn together their inner surfaces are made to bind more or less
intimately on the flanges a2, b2 of the flanged discs a', a, b, b. When the half
rings are in an intermediate position the said friction ring f','is free of both
the fixed ring e and flanges a², 62 of the flanged discs a¹, a², b', 2.
The two halves of the friction ring are operated as follows: Fitted in
holes or recesses in the two presented parts of each half ring are screw boxes
the screw boxes of the half ring f¹ being marked ', ' and the screw boxes of the
half ring being marked h³, (see Figure 2); 2, 4, 7; 2, 4, are screw pins
the two ends, of each of which are provided with right and left hand screw
threads and engage in the said screw boxes h', 12 so that when the screw pins are
turned in one or other direction by their middle toothed or serrated collars i, i the
said right and left hand screw threads draw together or separate the two halves f¹³
of the friction ring. The middle serrated or toothed collar i of each screw pin
occupies the tubular boss of a lever k and the collar i is so locked in the said boss by
the toothed pad or grip piece l' and screw pin that on the turning of the lever kin
one or other direction the screw pin is also turned. The outer end of each lever k
is connected by a link m to a sliding collar p on the propeller shaft. B which collar is
moved in one or other direction by a hand lever n, inwardly projecting pins
or studs n', n' in a forked part of which hand lever engage in a neck q in the said
sliding collar p.
When the band lever n is in the full line position N¹ (Figures 1 and 4) the
friction ring', is in its fully expanded or forced out position and is in such close
contact with the fixed ring e that the said fixed ring e and friction ring f', f" are

page_text: virtually locked together, consequently the motor shaft A drives the propeller shaft B
through the bevel gearing a, d, d and b and in an opposite or reverse direction to that
of the motor shaft A.
By pressing the hand lever n into the first dotted position N2 (Figures 1 and 4)
the links m, m and levers k, k are made to occupy the dotted position N' (Figure 3)
and the halves of the friction ring are drawn together to such an extent that the
said friction ring is situated in its intermediate position in which position being
free to rotate the rotations of the bevel wheel a on the motor shaft A causes the
friction ring to rotate slowly between the flanges a³, 12 of the flanged discs a', a³, b³, b³
and the fixed ring e without communicating any motion to the propeller shaft B and
the propeller shaft is consequently at rest.
By turning the land lever n into the dotted position N (Figures 1 and 4) the
links in m, and levers k, k are moved into the dotted position N³ (Figure 3) and
the halves of the friction ring are drawn together and made to grip the
flanges a, 1 of the flanged discs a', a, b1, b2 with such tightness that the two flanged
dises a, a, b, 2 are locked together and consequently they and their shafts A, B
and the friction ring f', frotate as one; that is to say, the propeller shaft rotates
with and in the same direction as the motor shaft A.
, on the fixed ring e or on the
By varying the pressure of the friction the speed of the propeller shaft
flanges a², of the flanged discs a', a³,
may be reduced with respect to that of the motor shaft when the said propeller shaft
is rotating in its reverse or forward direction.
Although we have represented the sliding collar p on the propeller shaft we wish
it to be understood that where more convenient it may be arranged on the motor shaft
with the same effect.
And although we have only described and represented the said invention in
connection with the propeller shaft of a launch we wish it to be understood
that the reversing and stopping mechanism described may be applied to any
machinery or apparatus driven by a shaft having a continuous motion in one
direction only.
We further wish it to be understood that we do not limit ourselves to the exact
construction of the details described and represented of the reversing and stopping
mechanism as the said details may be modified to suit the kind of machinery to
which it is to be applied without departing from the essence or nature of the said
invention.
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 we claim as the
said invention :-
First. The new or improved reversing and stopping mechanism for oil, gas, or
other motor driven machinery or apparatus hereinbefore described and illustrated in
the accompanying drawings, the said mechanism consisting essentially of a bevel
wheel and flanged disc on the driving shaft and a similar bevel wheel and flanged
disc on the shaft to be driven, which shafts are arranged end to end and in line, the
said bevel wheels being geared together by bevel pinions turning on a cross spindle
situated between the bevel wheels and flanged dises the said spindle being capable of
rotation on the driving or driven shaft the ends of the cross spindle taking a bearing
in holes or depressions in the two halves or parts of a divided friction ring arranged
between the flanges of the flanged discs and a fixed ring concentric with the said
flanged discs the said halves or parts of the friction ring being capable of motion
radially from or towards one another being separated for locking the friction ring to
the fixed ring and drawn together either for gripping the flanges of the flanged
discs and virtually locking the said flanged discs together or for putting the
friction ring in its intermediate position, the several parts being arranged or
combined and acting substantially as and for the purpose hereinbefore described
and illustrated.
Secondly. In mechanism of the kind hereinbefore described and claimed in the

page_text: prior claim; the construction and arrangement or combination of parts for moving
in opposite directions the two halves or parts of the friction ring, the said arrangement
of parts consisting of screw boxes fitted in the presented parts of the two halves or
parts of the friction ring in which screw boxes pins, screwed at opposite ends with
right and left hand screw threads respectively, engage the middle parts or collars of
the said screw pins being fixed in the tubular bosses of levers the free ends of which
are connected by links to a sliding collar on one or other of the shafts so that when
the sliding collar is moved in one or other direction on the said shaft by means of a
hand lever the screw pin levers are turned and the halves of the friction ring
separated or drawn together substantially as and for the purpose herein before
described and illustrated in the accompanying drawings.
Dated the Eighteenth day of January 1897.
TANGYES LIMITED,
JAS. TANGYE,
ROBERT TINDALL, Directors..
J. W. PARKINS, Secretary.
TANGYES LIMITED,
JAS. TANGYE,
ROBERT TINDALL, Directors..
J. W. PARKINS, Secretary.
JAMES ROBDON, JUNIOR.