Improvements in Friction Clutches for Shafts.
Year: 1895

page_text: Date of Application, 25th Oct., 1895
Complete Specification Left, 24th July, 1896-Accepted, 22nd Aug., 1895
PROVISIONAL SPECIFICATION.
Improvements in Friction Clutches for Shafts.
We, JAMES RENTON, Foreman Engineer, Bathvile Steel Works, Armadale, in
the County of Linlithgow, North Britain, and DICKSON & MANN LIMITED of
Bathville Steel Works, Armadale, in the County of Linlithgow, North Britain,
Manufacturers, do hereby declare the nature of this invention to be as follows:-
This invention relates to friction clutches for shafts, and consists of an outer shell
truly bored, into which an expansion ring is fitted,-this expansion ring being in
two pieces and provided with suitable pockets or recesses for taking one half of six
small spindles longitudinally these being placed at equal distances around the inner
circumference of expansion ring.
Fitted on the shaft there is a casting with the usual appliance for engaging or
disengaging the clutch, but having a projecting part provided with corresponding
pockets or recesses for taking the other half of sinall spindles resting in the
expansion ring, these recesses being made with sufficient taper to expand the
friction or expansion ring, and at the same time prevent any possibility of jamming.
A cover or ring is provided for keeping the rollers in position. In action the
slightest advance of the internal part along the spindles expands the ring at six
different and equal points of its circumference, giving a far greater, more perfect
and uniform friction bearing than is possible with rings, which are expanded at one
point of their circumference only, thereby enabling a smaller clutch' to transmit
more power, while being keen and sensitive.
Dated this 23rd day of October 1895
JOHNSONS,
115 St. Vincent Street, Glasgow, Petitioners' Agents.
Improvements in Friction Clutches for Shafts.
We, JAMES RENTON, Foreman Engineer, Bathvile Steel Works, Armadale, in
the County of Linlithgow, North Britain, and DICKSON & MANN LIMITED Of
Bathville Steel Works, Armadale, in the County of Linlithgow, North Britain,
Manufacturers, 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 relates to friction clutches for shafts and has for its object to
provide a clutch that can be expanded at six or more equal points round its
circumference whereby a more perfect and uniform friction bearing is obtained
than is possible with clutches having rings which are expanded at one point of
their circumference only.
But in order that our said invention may be more readily understood and easily
carried into effect we will proceed to describe the same with reference to the
accompanying drawings in which
Figure 1 is an end view partly in section & Figure 2 a longitudinal section of
our improved clutch.

page_text: In carrying out our invention, we employ an outer shell A truly bored and which
is secured to the shaft, into which an expansion ring B is fitted, this expansion ring
being in two pieces and provided with suitable pockets or recesses 6 for taking one
half of six small spindles. C longitudinally, these being placed at equal distances
around the inner circumference of the expansion ring B, the said pockets being made
at an angle.
Fitted on the shaft there is a casting D with the usual appliance for engaging or
disengaging the clutch but having a projecting part provided with corresponding
pockets or recesses d for taking the other half of the small spindles C resting in
the expansion ring, these recesses d being made with sufficient taper to expand
the friction or expansion ring B, and at the same time prevent any possibility of
jamming.
A cover or ring F is provided for keeping the rollers or spindles C in position,
the cover being secured to the outer shell A. by bolts or the like.
In action the slightest advance of the internal part with the recesses d along the
spindles C expands the ring at six different and equal points of its circunference,
giving a far greater, more perfect and uniform friction bearing than is possible
with rings which are expanded at one point of their circumference only, thereby
enabling a smaller clutch to transmit more power, while being keen and
sensitive.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1st. The improved friction clutch for shafts substantially as hereinbefore described
and shewn in the accompanying drawings.
2nd. In friction clutches for shafts, the employment of an expansion ring in two
pieces having angled pockets or recesses at different and equal points of its
circumference, for the reception of one half of small rollers or spindles; and a
casting having correspondingly tapered or angled pockets or recesses for receiving
the other half of the spindles so that the slightest advance of the casting with the
pockets along the spindles expands the ring at different points of its circumference,
as described and shewn.
3rd. In friction clutches for shafts, the ring or cover for keeping the spindles in
position within the pockets as described and shewn.
Dated this 22nd day of July 1896.
JOHNSONS,
115 St. Vincent Street, Glasgow, Applicants' Agents.