Improvements in Jig Wheels and Pulleys for Mine Inclines and for like Purposes.
Year: 1897

page_text: Date of Application, 19th Mar., 1897
Complete Specification Left, 20th Dec., 1897-Accepted, 19th Mar., 1898
PROVISIONAL SPECIFICATION.
Improvements in Jig Wheels and Pulleys for Mine Inclines and for
like Purposes.
I, WATSON FOGGO, of Anna Valley, Andover, in the County of Hants, Engineer,
do hereby declare the nature of this invention to be as follows:-
My invention relates to an improved form of jig wheel or pulley for use in con-
nection with self-acting inclines of coal or other mines and for like purposes, the
object being to arrange a reliable and simple brake in connection with the wheel
and to provide a simple form of construction of the wheel frame.
In carrying my invention into effect when constructing a single jig wheel or
pulley I mount it in a frame or strap having a bolt or other like fastening for
securing it to a framework or baulk, and I arrange that the strap shall be longer at
one side than at the other for the purpose of receiving the projecting ears of a
brake strap which I mount in the internal part of the I'm of the
wheel. I pass a pin or axle through the strap from one side to the other,
and I mount within the strap a split ring of cast iron, steel or other suitable material
of such a diameter that when the open ends are forced outwards by a cam, lever or
other device, friction is set up between the exterior of the spring or strap and the
interior of the wheel rim. The brake strap is prevented from revolving by ears
which project and engage with the lengthened bar or strap through which the axle
passes, and on the other portion of the strap I mount a lever through which a pin
passes having a cam or the like which when thrust in either direction will force
outwards the ends of the spring and thus apply the brake.
When arranging the double groove pulley I mount a smaller guide pulley within
the framework or strap which carries the pullies, and I cause the rope to pass round
one groove of the main wheel and then to pass half round the smaller
guide wheel from which it is carried round the other groove of the
main wheel, so that the ropes do not pass or chafe each other on the main wheel,
and on the main wheel I form a brake ring the ends of which I open to force out-
wards to set up the necessary friction by a hand-lever having a cam in connection
with the same which opens or forces outwards the free ends of the split ring.
I sometimes line my brake strap with leather or strips of wood or suitable material
for increasing the friction, and I form the brake in the ring between pieces of the
wheel or I tack it independently to suit the particular conditions for which the wheel
is intended.
I do not limit the application of my invention to any particular form of wheel
brake strap or to any special arrangement of framing in carrying the pulley wheel
but modify the same to suit any particular requirement.
Doted this 10th dow of Wamh 1007
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.

page_text: Improvements in Jig Wheels and Pulleys for Mine Inclines and for
like Purposes.
I, WATSON FOGGO, of Anna Valley, Andover, in the County of Hants, Engineer,
do hereby declare the nature of this invention and in what inanmer the same is to
be performed, to be particularly described and ascertained in and by the following
statement:
My invention relates to an improved form of jig wheel or pulley for use in con-
nection with self acting inclines of coal or other mines and for like purposes, the
object being to arrange a reliable and simple brake in connection with the wheel
and to provide a simple form of construction of the wheel frame.
My invention is illustrated in the accompanying drawings in which Figures 1
and 2 are front and side elevations respectively of a single jig wheel applied with
my invention, while
Figure 3 is a detail view corresponding with Figure 1.
Figures 4 and 5 are front and side elevations respectively of a double jig wheel
applied with my invention, while
Figures 6 and 7 are front and side elevations showing a modified arrangement
in which my invention is carried into effect.
In carrying my invention into effect when constructing a single jig wheel or pulley
as illustrated in Figures 12 and 3 of the accompanying drawings, I mount the
wheel in a frame or strap A having a bolt B or other like fastening for securing it
to a framework or baulk, and I arrange that the strap A shall be longer at one
side A than at the other for the purpose of receiving the projecting ears CC of a
split ring F which I mount in the internal part of the rim of the wheel 1) within a
suitable recess provided for the purpose. I pass a pin or axle E through the strap
from one side to the other, and I mount within the strap a split ring F of cast
iron, steel or other suitable material of such a diameter that when the open ends are
forced outwards by a cam such as G, lever or other device, friction is set up between
the exterior of the ring or strap F and the interior of the wheel rim D. The brake
strap is prevented from revolving by ears CC which project and engage with the
lengthened bar or strap A through which the pin or axle E passes, and on the
upper portion of the strap A, I mount a lever H through which a pin I passes having
a cam G or the like which when thrust in either direction will force outwards the
ends ff of the ring or strap F and thus apply the brake to the rim of the wheel D.
Figure 3 shows in detail front elevation the cam G and the extremities ff of the
strap F, the arm A¹ being removed.
In carrying my invention into effect according to a modified design in its applica-
tion to a double groove pulley D³ as illustrated in Figures 4 and 5 of the drawings,
I mount a smaller guide pulley J within the framework or strap A which carries
the pulley D³, and I cause the rope to pass round one groove d of
the main wheel D2 and then to pass half round the smaller guide wheel J
from which it is carried round the other groove d' of the main wheel, so that the
ropes do not pass or chafe each other on the main wheel. On the main wheel I
provide a brake rim K secured to the wheel D by means of lugs k in which the brake
ring or strap F is mounted whose extremities ff are forced outwards to set up the
necessary friction by a head lever H having a cam G in connection with the same
which opens or forces outwards the free ends of the split ring F to apply the brake.
According to a further modification as illustrated in Figures 6 and 7 of the draw-
ings I may provide a tension band brake L upon the periphery of the brake rim K,
such tension band being operated by a hand lever mounted on pin I which by

page_text: lateral movement in either direction causes the slight rotation of the piece M,
mounted upon the same pin I as the lever, to which piece the extremities of the
strap L are secured by attachment to the hinge plates N so that thereby the band is
put into tension and the brake applied.
I sometimes line my brake strap with leather or strips of wood or suitable material
for increasing the friction, and I form the brake in the ring between pieces of the
wheel or I tack it independently to suit the particular conditions for which the wheel
is intended.
I do not limit the application of my invention to any particular form of wheel
brake strap or to any special arrangement of framing in carrying the pulley wheel
but modify the same to suit any particular requirement.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is:-
1. In jig wheels and pulleys for mine inclines and for like purposes a brake
consisting in combination, of a brake rim such as K, a brake strap such as F, and
cam such as G, operated by a hand lever applied upon the frame of the wheel or
pulley, substantially as and for the purpose hereinbefore described.
2. In jig wheels and pullies for mine inclines and for like purposes a brake con-
sisting in combination of a brake rim such as K, a brake strap such as F, and cam
such as G, operated by a hand lever applied upon the frame of the wheel or pulley,
such frame being extended on one side to retain the brake strap in position substan-
tially as and for the purpose hereinbefore described and illustrated in Figure 1 and
the drawings.
3. In jig wheels and pulleys for mine inclines and for like purposes, a brake
applied and operating substantially as and for the purpose hereinbefore described
and illustrated.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.