Improvements in and relating to Friction Clutches.
Year: 1895

page_text: Date of Application, 9th Mar.. 1895
Complete Specification Left, 9th Dec., 1895-Accepted, 11th Jan., 1896
PROVISIONAL SPECIFICATION.
Improvements in and relating to Friction Clutches.
I, HENRY BELL of Wishaw Engine Works, Wishaw, Lanarkshire, Engineer,
do hereby declare the nature of my invention to be as follows:-
This invention has reference to improvements in and relating to friction clutches,
such as used for coupling the ends of shafting together, or for coupling to shafting
the wheels or pulleys of spur or belt gearing and the like.
As applied as a clutch for coupling a gear spur pinion or a pulley to a shaft, a
block or boss would be mounted by an eye and keyed or otherwise secured to the
shaft.
The outer circumference of this block would be formed of a double tapered or
✓ shape and over this block would be mounted annularly the ends of two corre-
spondingly shaped half parts bolted through flanges, or otherwise secured together.
One of these parts would be formed on or secured to a spur pinion or gear organ
mounted by an eye boss loosely over the shaft; while the other part would be
narrowed down and continued as an annular tube part loosely surrounding the shaft.
A sliding grooved collar would be mounted round this tube part, and have its eye
or boss part tapered to slide over a ball, roller or like organ, mounted in a recess
in tube part, or between it and collar. When this collar is actuated by a hand
lever it slides along the tube part and in passing over the roller it draws the tube
tightly together and so forms a clutch round shaft for the gear wheel which thus
turns with and transmits the motion of shaft to a train of wheels in gear with it.
While the reversing of hand lever slides the collar the opposite way and so
disengages the clutch from the rotating shaft.
Dated the 8th day of March 1895
W. R. M. THOMSON & Co.,
96 Buchanan Street, Glasgow, Agents.
Improvements in and relating to Friction Clutches.
I, HENRY BELL of Wishaw Engine Works, Wishaw, Lanarkshire, Engineer,
do hereby declare the nature of my invention and in what manner the same
is to be performed to be particularly described and ascertained in and by the
following statement in writing, that is to say :—
This invention has reference to improvements in and relating to friction clutches
such as used for coupling the ends of shafting together, or for coupling to shafting
the wheels or pulleys of spur or belt gearing and the like.
And in order that my said invention and the manner of performing or carrying
same into practice may be properly understood I have hereunto appended an
explanatory drawing in which Figure 1 represents a sectional elevation, Figure 2
an external elevation, and Figure 3 an end view of a friction clutch as constructed
in accordance with my improvements.

page_text: Referring to said drawing which shows a clutch for coupling a gear spur pinion
or a pulley to a shaft, or it may be for coupling shafts, a block or boss a is mounted
on and keyed at a² or otherwise secured to the shaft b indicated in dotted lines.
The outer circumference of this block a is formed of a double tapered or V shape
and over this block is mounted annularly two correspondingly shaped half parts or
segments ce bolted at 2 through flanges to corresponding parts formed in one
with the sleeve c¹ or otherwise secured together. When used to couple, say a
rotating shaft to spur wheel gearing or the like, the spur pinion e, indicated in
dotted lines, or other gear organ is mounted and keyed on the sleeve or eye boss c¹,
loose on the shaft 61, which in this case may be in one with or a continuation of the
shaft b, while the other two parts c c² are narrowed down and continued as an
annular split tube or sleeve c³ loosely surrounding the shaft b. A sliding grooved
collar is mounted round this split tube or sleeve c and have its eye or boss
part tapered to slide over balls, rollers, or like organs 9 mounted in recesses in
tube parts c or between them and collar f. When this collar f is actuated by
an ordinary forked band lever it slides along the tube parts and in passing over
the roller g it compresses the split tube and so clutches the shaft 6 and boss a with
the segments and sleeve o carrying the spur wheel e which thus turns with and
transmits the motion of shaft to any train of wheels in gear with it. While the
reversing of hand lever slides the collar f in the opposite direction and so disengages
the clutch from the boss a on the rotating shaft b. When used as a shaft coupling
clutch the shaft 6' in this case separate from the rotating shaft b as indicated at b³
will be keyed or otherwise secured to the sleeve of the action being the same as
described but the motion is conveyed from the shaft b to the shaft b¹.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
A friction clutch constructed and arranged substantially as and for the purposes
herein described in reference to and shown in the accompanying drawing.
Dated the 7th day of December 1895
W. R. M. THOMSON & Co.,
96 Buchanan Street, Glasgow, Agents.
W. R. M. THOMSON & Co.,
96 Buchanan Street, Glasgow, Agents.