IMPROVEMENTS IN BRAKES AND COUPLINGS FOR TRANSMITTING AND REGULATING MOTION
Year: 1879

page_text: "
LETTERS PATENT to Jonathan Pickering, of Globe Works, Stockton-on-Tee
in the County of Durham, Engineer, for the Invention of IMPROVEMENTS IN
BRAKES AND COUPLINGS FOR TRANSMITTING AND REGULATING MOTION."
Sealed the 27th June 1879, and dated the 1st January 1879.
PROVISIONAL SPECIFICATION left by the said Jonathan Pickering at the
Office of the Commissioners of Patents on the 1st January 1879.
JONATHAN PICKERING, of Globe Works, Stockton-on-Tees, in the County of
Durham, Engineer. IMPROVEMENTS IN BRAKES AND COUPLINGS FOR TRANSMITTING
AND REGULATING MOTION."
This improved brake and coupling is an internal arrangement wherein the
friction of a brake strap round the outside of a wheel is forced against the periphery
of another wheel inside, and binds the two together in such a manner that one
becomes the driver of the other, which brake when released by a backward move-
ment disconnects the two wheels, and allows them to run loose; for example, by
being attached to a warehouse hoist the pulling of the rope on one side will give
immediate effect to the brake, which in reality becomes a coupling, and a load may
be raised to any height, and when the rope is let go the load is retained and
cannot fall.
To lower however, the rope is pulled on the opposite side, but the moment this
is let go the brake is brought into action, and the hoist stops with the load
suspended.
There is a ratchet wheel into which a pawl engages which never requires to be
touched. Joined to the ratchet wheel is another wheel which is the carrier for the
brake strap; these two wheels run loose on the axle. Facing the brake strap wheel
is a lever keyed fast to the axle, and connected thereto with another lever; their
use is to fix or release the brake strap. Another wheel surrounds the brake strap
wheel or drum, and is attached to the load wheel or barrel, the brake or coupling
forming one complete case.
The action of the brake is obtained by the levers forcing the strap tight against
the drum, pushing outward and forward at the same time, which movement causes
it to assume one compact coupling, and when relieved by a backward turn the
coupling becomes a brake, and can be regulated by the operation without the
handle or wheel flying round, so that accidents will be entirely prevented.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Jonathan Pickering in the Great Seal Patent Office on the 1st July
1879.
JONATHAN PICKERING, of Globe Works, Stockton on Tees, in the County of
Durham, Engineer. IMPROVEMENTS IN BRAKES AND COUPLINGS FOR TRANSMITTING
AND REGULATING MOTION."
This improved brake and coupling is an internal arrangement wherein the
friction of brake straps or blocks A round the outside of the wheel B is forced
against the periphery of another wheel Cinside, and binds the two together in such
a manner that one becomes the driver of the other, which brake when released by a
backward movement of the hoisting rope or chain disconnects the two wheels, and
allows them to run loose; for example, by being attached to a warehouse hoist the
pulling of the rope on one side will give immediate effect to the brake, which in
reality becomes a coupling, and a load may be raised to any height, and when the
rope is let go the load is retained and cannot fall.
To lower however, the rope is pulled on the opposite side, but the moment this
is let go the brake is brought into action, which causes the load to remain sta-
tionarily suspended.
There is a ratchet wheel into which a series of pawls or levers G engage, and
which are self acting. Joined to the ratchet wheel is another wheel B, which is the
carrier for the brake straps or blocks; these two wheels run loose on the axle, and
are put in motion by a screw E. Another wheel F surrounds the brake strap
wheel or drum, and is engaged with the load wheel or barrel by means of levers or
pawls G, the brake or coupling forming one complete enclosure.
The action of the brake is obtained by the levers or pawls G expanding the straps
or blocks against the drum while moving in a lateral direction, which movement
causes it to assume one compact coupling, and when relieved by a backward turu
the coupling becomes a brake, and can be regulated by the operator without the
handle or wheel flying round, so that accidents will be entirely prevented.
In order to the better understanding and further explanation of my Invention,
referring to the Drawing,
Fig. I is a transverse section showing the internal combination of the various
parts and their method of arrangement. A is a strap or block of either metal or
wood, which may or may not be furnished with an outer covering of leather or
other material to increase friction. B is a conie-shaped nut forced into the centro
of A by the action of the screw E when the rope is pulled in one direction, thereby
forming a friction coupling which becomes the more intensified the greater the
weight it has to sustain, and the action of lowering is only effected by means
of pulling the same rope in an opposite direction, so as to release the brake
to a suitable extent at any speed or, to remain suspended at the will of the
operator.
Fig. 2 is a view of the end on which the rope wheel is fixed, and which
may be constructed to hoist a load by pulling either side of the rope to suit
circumstances.
Fig. 3 is a plan showing the whole apparatus enclosed in its working con-
dition.
Having thus described the nature and object of my said Invention, I declare
that what I claim and desire to be secured to me is,-
The general arrangements with part thereof or combinations of parts forming
respectively my improvements in brakes and couplings for transmitting and regu

page_text: lating motion, substantially in the manner and for the purposes herein before
described, and shewn on the Drawings.
In witness whereof, I, the said Jonathan Pickering, have hereunto set my
hand and seal, this Thirtieth day of June, in the year of our Lord One
thousand eight hundred and seventy nine.
JONATHAN PICKERING. (L.S.)