Improvements in Brake Apparatus for the Wheels of Travelling Cranes or the like.
Year: 1892

page_text: Date of Application, 20th June, 1892
Complete Specification Left, 20th Mar., 1893-Accepted, 20th June, 1893
PROVISIONAL SPECIFICATION.
Improvements in Brake Apparatus for the Wheels of Travelling
Cranes or the like.
I JOHN KEELING, of East Lane, Stanhope, in the County of Durham, Engineer,
do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in brake apparatus for the wheels of
travelling cranes or the like, and has for its object to provide a brake which can
be applied whatever position the crane is in, and serves to keep the travelling
parts thereof immovable while the crane is in action.
In carrying my invention into practice, I provide a long rod of steel or other
suitable material furnished at one end with a small wheel, this wheel carrying a
handle near its outer edge by means of which the rod can be turned. This rod
passes through a suitable bearing and is screw-threaded at its other extremity by
means of which it engages with the screw-threaded end of one arm of a bell-crank
lever, the other arm of which is pivoted to a suitable connecting rod; the end of
this connecting rod is secured to a small platform which is supported by two
uprights or standards arranged on the under frame of the crane.
From the centre of this platform and extending downwards underneath the said
frame, is a long rod the free extremity of which is pivoted to one arm of a
bell-crank lever which actuates a set of toggle levers by means of which the
brake shoes or blocks are applied to the wheels similarly to the brake of a
locomotive.
The brake may also be worked by steam, for which purpose a small cylinder is
placed on the revolving platform of the crane, the piston of which serves to raise
the arm of the first mentioned bell-crank lever instead of its being actuated by
means of the screw-rod hereinbefore described, or they may be used conjointly.
Dated this 20th day of June 1809
HUGHES, SON & Co.,
38, Chancery Lane, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Brake Apparatus for the Wheels of Travelling
Cranes or the like.
I JOHN KEELING, of East Lane, Stanhope, in the County of Durham, Engineer,
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:
My invention relates to improvements in brake apparatus for the wheels of
travelling cranes or the like and has for its object to provide a brake which can
be applied whatever position the crane is in and serves to keep the travelling
parts thereof immovable while the crane is in action.
In carrying my invention into practice I provide a long rod of steel or other
suitable material furnished at one end with a small wheel, this wheel carrying a
handle near its outer end by means of which the rod can be turned. This rod
passes through a suitable bearing and is screw-threaded at its other extremity by
means of which it engages with the screw threaded end of one arm of a bell-crank
lever, the other arm of which is pivoted to a suitable connecting rod; the end of
this connecting rod is secured to a small platform which is supported by two
uprights or standards arranged on the under frame of the crane.

page_text: From the centre of this platform and extending downwards underneath the said
frame is a long rod the free extremity of which is pivoted to one arm of a
bell-crank lever which actuates a set of toggle-levers by means of which the
brake shoes or blocks are applied to the wheels similarly to the brake of a
locomotive. The brake may also be worked by steam for which purpose a small
cylinder is placed on the revolving plat orm of the crane, the piston-rod of which
serves to raise the arm of the first-mentioned bell-crank lever instead of its being
actuated by means of the screw rod herein before described, or they may be used
conjointly.
,
In the accompanying drawings
Fig. 1 is a side elevation of my improved gear, Fig. 2 is an end elevation of the
same;
Fig. 3 is a sectional view of the revolving gear and Fig. 4 a plan of the same.
My improved mechanism consists of a steel rod a provided with a wheel 6 and
handle c by means of which the said rod is rotated. The screw threaded end
engages with a bell crank lever 1 which likewise engages with the connecting rod r,
one end of the rod is secured to the revolving platform p which imparts a motion
by means of the connecting rod to a set of levers by means of which the brake is
applied.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, declare that what 1.
claim is :
The improvements in the brake gear of travelling cranes, arranged constructed
and operating substantially as herein described and shown with reference to the
accompanying drawings.
Dated this 20th day of March 1893.
HUGHES, SON & Co.,
38, Chancery Lane, W.C., Agents for the Applicant.