Year: 1898

page_text: Date of Application, 31st Oct., 1898
Complete Specification Left, 12th July, 1899-Accepted, 14th Oct., 1899
A communication from ETIENNE ROMAN, Builder, of 15, Quai du Canal, Marseilles,
in the Republic of France..
I, ALFRED JULIUS BOULT, of 111, Hatton Garden, in the County of Middlesex,
Chartered Patent Agent, do hereby declare the nature of this invention to be as
follows:-
This invention relates to a coupling, in which the motion is first transmitted by
the friction of two metallic bands lined with leather, on the surface of a disc,
said friction being produced by the movement of a movable sleeve provided with
a circular groove and acting on two or other number of rollers mounted on pins
which carry the attachments of the aforesaid leather lined bands.
The engagement between the two coupling parts is finally ensured by the engage-
ment of four or other number of latches or pawls operated by spring-controlled
levers on the movable sleeve, said pawls engaging with ratchet teeth or recesses
of a ring secured to the inner surface of the second or main half of the coupling.
The main coupling part or sleeve is keyed to one of the shafts and has a ring
provided with ratchet teeth or recesses on its inner face. The ring may be mounted
so as to enable rotation to be transmitted in either direction. A disc is keyed
to the shaft which is to be coupled to the first shaft.
To the rim of the main coupling half are secured two lugs supporting the parts
destined to produce the required frictional engagement.
These parts comprise steel pins carrying arms, on the ends of which are mounted
rollers adapted to engage with the conical surface of the longitudinally movable
grooved coupling half.
On the same pins are mounted attachment devices for steel friction bands pro-
vided with leather linings and spring compensating devices.
The disc arranged in the interior of the main coupling part is provided with
guides or projections, in which are placed the latches or pawls the ends of which
are formed to correspond to the shape of the intervals between the ratchet teeth
or of the recesses of the toothed ring.
The hub of the central disc is provided with holes serving to guide rods for
operating the pawls or latches.
These rods move longitudinally passing through the longitudinally movable
coupling part and are secured at their outer ends to a ring sliding on the driving
shaft. Towards their inner ends, they are connected to arms operating the pawls
to latches by means of springs, said springs having the tendency to keep the
latches in engagement with the toothed ring.
The grooved half operated by a disengaging fork effects the coupling of the
two parts, first by the friction of the leather covered bands on the disc, when the
levers carrying the rollers are raised by their rollers rising or moving outwards
on the conical portion of the coupling. The coupling is then completed by the
гр.

page_text: engagement of the latches with the toothed ring, since by continuing to advance
the movable half of the coupling, it strikes the operating rods which raise their
connecting arms and energise the springs which operate the latches.
This having been effected, the grooved coupling half is moved backwards to the
extent of half its travel, whereby the levers carrying the rollers become inopera-
tive, and the friction band is slackened and the coupling action is effected only
by the latches. Disconnection is effected without shocks or vibration by with-
drawing the movable half completely back, whereby the arms are operated and the
latches withdrawn into the interior of the disc.
The teeth of the wheel and of the latches, instead of being sharp, may be straight
with rounded corners and edges.
Instead of vertical latches sliding along the arms and engaging with the corre-
sponding teeth of a wheel secured to the fixed coupling part, it is possible to use
any other arrangement such, for instance, as horizontal latches engaging with
recesses made for the purpose in one and in the other part of the coupling half.
This coupling may be used for all kinds of transmission and enables the employ:
ment of loose pulleys to be avoided.
Dated this 31st day of October 1000
BOULT & WADE,
'Agents for the Applicant.
r
A B Car Couplings or Crutches.
A communication from ETIENNE ROMAN, Builder, of 15, Quai du Canal; Marseilles,
in the Republic of France.
I, ALFRED JULIUS BOULT, of 111, Hatton Garden, in the County of Middlesex,
Chartered Patent Agent, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
This invention relates to a coupling in which the motion is first transmitted by
the friction of two metallic bands lined with leather, on the surface of a disc,
said friction being produced by the movement of a movable sleeve provided with
a circular groove and acting on two or other number of rollers mounted on pins
which carry the attachments of the aforesaid leather lined bands.
The engagement between the two coupling parts is finally ensured by the
engagement of four or other number of latches or pawls operated by spring-con-
trolled levers from the movable sleeve, said pawls engaging with ratchet teeth
or recesses of a ring secured to the inner surface of the second or main half of
the coupling.
The accompanying drawing illustrates by way of example a coupling according
to this invention.
Figure 1 being a vertical section, and
Figure 2 a front view,
Figure 3 being a detail section of a latch or pawl on the line x x Figure 1.
Figures 4, 5 and 6 represent on a larger scale details of the connection between
the rods O and the latches N.
Figure 4 being a vertical section on the line 1-2 of Figure 5,
Figure 5 a plan, and
Figure 6 a side elevation.
A is the main coupling part or sleeve keyed to one of the shafts B and has a

page_text: ring C provided with ratchet teeth or recesses on its inner face. The ring may be
arranged so as to enable rotation to be transmitted in either direction. A disc D
is keyed to the shaft E which is to be coupled to the first shaft B.
To the rim of the main coupling half A are secured two lugs Z supporting the
parts destined to produce the required frictional engagement.
These parts comprise steel pins F carrying arms G on the ends of which are
mounted rollers H adapted to engage with the conical surfaces J of the longi-
tudinally movable grooved coupling half I.
On the same pins F are mounted attachment devices for steel friction bands K
provided with leather linings L and spring compensating devices M.
The disc D arranged in the interior of the main coupling part A is provided with
guides or projections, in which are placed the latches or pawls № the ends of
which are formed to correspond to the shape of the intervals between the ratchet
teeth or of the recesses of the toothed ring C.
The hub of the central disc D is provided with holes serving to guide rods O
for operating the pawls or latches Ñ.
These rods move longitudinally passing through the longitudinally movable
coupling part and are secured at their outer ends to a ring P sliding on the driving
shaft E. Towards the outer end at Q they are connected to arms R operating
the pawls or latches N by means of springs S, in order to force the extremities
of the latches into engagement with the toothed ring C.
Each rod O carries a threaded screw bolt or eye Q through which passes a pin V
serving as a point of attachment for the rods R, the other ends of which are
pivotted on another pin X to which is connected one end of the spring S. At its
lower end this spring is secured to one of the spindles by which the casing Z is
connected to the latch N, said casing having two longitudinal slots in which the
pin X on which the spring is suspended can move up and down according to the
movement of the rod O.
The grooved half operated by a disengaging fork effects the coupling of the
two parts first by the friction of the leather covered bands on the disc 1) when
the levers G carrying the rollers are raised by their rollers H rising or moving
outwards on the conical portion of the coupling. The coupling is then completed
by the engagement of the latches N with the toothed ring C since, in continuing
to advance, the movable half of the coupling strikes the operating rods which raise
their connecting arms R and extend the springs which operate the latches.
This having been effected, the grooved coupling half is moved backwards to
the extent of half its travel, whereby the levers carrying the rollers become
inoperative and the friction band is slackened and the coupling action is effected
only by latches. Disconnection is effected without shocks or vibration by with-
drawing the movable half completely back whereby the arms R are operated and
the latches withdrawn into the interior of the disc.
The teeth of the wheel and of the latches, instead of being sharp, may be straight
with rounded corners and edges as shown at V in Figure 2.
Instead of vertical latches, sliding along the arms and engaging with the corre-
sponding teeth of a wheel secured to the fixed coupling part it is possible to use
any other arrangement such for instance as horizontal latches engaging with
recesses made for the purpose in one and in the other part of the coupling half.
This coupling may be used for all kinds of transmission and enables the employ-
ment of loose pulleys to be avoided.
Having now particularly described and ascertained the nature of the said
invention as communicated to me by my foreign correspondent and in what
manner the same is to be performed, I declare that what I claim is:-
1. A coupling device in which a frictional engagement is produced by rollers
on the one part engaging with and moving outwards from a conical portion of
the other part of the coupling whereby leather friction bands mounted on the one
part engage with the periphery of a disc on the other part the final engagement

page_text: being effected by the coned part of the coupling continuing to advance longi-
tudinally on its shaft thereby operating latches effecting the connection between
the two coupling parts.
2. In a coupling of the kind described two or other number of sliding rods
arranged parallel to the shaft and operated by the longitudinally movable part of
the coupling arms for operating the latches being connected to said sliding rods,
the latches sliding in recesses in the arms of one of the coupling halves and
engaging with the teeth of a ring secured to the other half.
3. In a coupling of the kind described intermediate springs to which are
connected, on the one hand arms, as R, and on the other hand latches, as N, said
springs ensuring the engagement of said latches with the teeth of the ring C.
4. The combination and arrangement of parts constituting the complete
coupling device substantially as described or illustrated in the accompanying
drawings.
1011 2
C T 1
1000