Improvements in and relating to Coils employed in Clutches, Brakes, and the like.
Year: 1891

page_text: Date of Application, 14th Apr., 1891
Complete Specification Left, 13th Jan., 1892-Accepted, 27th Feb., 1892
PROVISIONAL SPECIFICATION.
Improvements in and relating to Coils employed in Clutches,
Brakes, and the like.
We, EDWARD SILAW of Ashton Gate in the City and County of Bristol,
Engineer, and GEORGE JOHN HARCOURT of 5, Albert Villas, Clifton, Bristol,
aforesaid, Gentleman, do hereby declare the nature of this invention to be as
follows:-
This invention relates to coils employed in clutches, brakes and the like as a
means of controlling or arresting rotary motion. It consists in providing such coils
with a sheathing or partial sheathing of metal or other suitable material, which
sheathing is made to intervene between the coil and the body about which it is
wound.
The sheathing may wholly envelope the coil, or it may consist of a series of
separate open shoes or slippers partially cinbracing the coil. In either case, the
sheathing is secured to the coil and serves as a shield for protecting it against tear
and wear.
Thus the durability of the coil is increased.
Dated this 12th day of Auril 1801
NICHOLAS WATTS,
Applicants' Agent.
COMPLETE SPECIFICATION.
Improvements in and relating to Colls employed in Clutches,
Brakes, and the like.
We, EDWARD SHAW, of Ashton Gate, in the City and County of Bristol,
Engineer, and GEORGE JOHN HARCOURT, of 5 Albert Villas, Clifton, Bristol
aforesaid, Gentleman, 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 coils employed in clutches, brakes and the like as a
means of controlling or arresting rotary motion. It consists in providing such
coils with a sheathing or partial sheathing of metal or other suitable material,
which sheathing is made to intervene between the coil and the body about which
the coil is wound. The sheathing may wholly envelope the coil, or it may consist
of a series of separate open shoes or slippers partially embracing the coil. In either
case, the sheathing is secured to the coil and serves as a shield for protecting it
against tear and wear. Thus the durability of the coil is increased.
In the accompanying drawing
Fig. 1 represents a part of a coil a furnished with protecting shoes or slippers & in
accordance with one method of sheathing comprised in this invention.
Fig. 2 is a transverse section on the line Fig. 1.
The shoes b may be of metal or other suitable material. They are secured upon
the coil by bending the ears towards the coil until the latter is firmly gripped
by them. When the coil is wound about a body the rotary motion of which it
is designed to control or arrest, the shoes intervene between it and the said body,
the coil being thereby kept out of contact with the body. Similarly, when the coil
is contained within a shell or hollow body, the shoes intervene between it and that
part of the shell on which the coil act-.

page_text: At Figs. 3, 4 and 5 is illustrated a modified form of shoe cas adapted for double
coils; Fig. 3 being an elevation, Fig. 4 a plan and Fig. 5 a section on the line y, y,
Fig. 4.
In this arrangement the shoe is secured in place by screws d d passed through
the plate e and into the shoe.
Instead of being in the form of separate open shoes as shown at Figs. 1 to 5 of
the drawing, the sheathing may consist of separate tubes fenveloping the coil a as
shown at Figs. 6 and 7, or it may consist of a continuous tube extending throughout
the whole length of the coil.
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 -
:―
In a coil as employed for controlling or arresting rotary motion in clutches,
brakes, and like and analogous appliances, the provision of a sheathing, either
tubular or consisting of a series of separate shoes, envelopping or partially
envelopping such coil and intervening between it and the surface about or within
which it is wound, substantially as hereinbefore described.
Dated this 19th January 1800
NICHOLAS WATTS,
Bristol Bank Buildings, Bristol, Agent.
NICHOLAS WATTS,
Bristol Bank Buildings, Bristol, Agent.