Improvements in or relating to Brake Devices suitable for Cranes and the like.
Year: 1894

page_text: Date of Application, 19th Nov., 1894
Complete Specification Left, 16th July, 1895-Accepted, 5th Oct., 1895
A
PROVISIONAL SPECIFICATION.
Improvements in or relating to Brake Devices suitable for Cranes
and the like.
communication from FAHRENDELLER
HÜTTE-WINTERBERG & JURES,
Ironfoundry and Machine-works, of Bochum, in the Empire of Germany.
I, ALFRED JULIUS BOULT of 323 High Holborn, in the County of Middlesex,
Chartered Patent Agent, do hereby declare the nature of this invention to be as
follows:-
This brake-device consists of a toothed ring attached to the frame of the crane
or machine to which it is applied and concentrically arranged on the axle of th
driving gear. Upon this shaft is secured a disc with conveniently four projections
on its front side. Upon the shaft between these four projections is loosely mounted
a driving cross secured on whose hub is a spur-wheel, engaging with the spur-wheel
secured to the crank-or first driven shaft. Between the disc and the cover-disc
enclosing the device are pawls pivotted on studs in pairs between each pair of the
before mentioned projections and in opposite directions. The pivots of the pawls
serve as distance pins between the disc and cover-disc.
When the movement of the crank-axle takes place, for the purpose of raising
the weight, the cross overruns the disc, and thus lifts the pawls out of the toothed
ring thereby causing the intermediate or communicating shaft, and therewith the
lifting drum, to rotate.
.
The pawls lying behind the arms of the cross slide at the same time over the
teeth of the ring and drop into the next following space between the teeth, whereby
the descent of the weight is prevented.
Dated this 19th day of November 1894.
W. P. THOMPSON & BOULT,
Agents for the Applicant.
LUMI LEIE
Improvements in or relating to Brake Devices suitable for Cranes
and the like.
A communication from FAHRENDELLER HÜTTE-WINTERBERG AND JURES,
Ironfoundry and Machine-works, of Bochum, in the Empire of Germany.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Chartered Patent Agent, 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 brake-device consists of a toothed ring a attached to the frame of the crane
or machine or which it is applied and concentrically arranged in relation to the
driving shaft D. Upon this shaft is secured a disc b with conveniently four
projections 6' on its front side. Upon the shaft D between these four projections b¹
DO37

page_text: is loosely mounted a driving cross c secured on whose hub is a spur-wheel z engaging
with the spur-wheel secured to the crank-or first driven shaft D'. Between
the disc band the cover-disc d enclosing the device are pawls e pivoted on studs in
pairs between each pair of the before mentioned projections and in opposite
directions. The pivots of the pawls e serve as distance pins between the disc b and
cover-disc d.
When the crank-axle D' is rotated, for the purpose of raising the weight, the
cross coverruns the disc b, and thus lifts the pawls e out of the toothed ring a thereby
causing the intermediate or communicating shaft D and therewith the lifting
drum E to rotate.
Those of the pawls e which are behind the arms of the cross c slide at the same
time over the teeth of the ring a and drop into the spaces between the teeth,
whereby the descent of the weight is prevented.
Having now particularly described and ascertained the nature of the said inven-
tion, as communicated to me by my foreign correspondents, and in what manner the
same is to be performed, I declare that what I claim is ;-
1. Automatic stop-motion for lifting or hoisting apparatus characterised by a
disc b secured on the intermediate shaft D and provided with projections and pairs
of oppositely directed pawls and an internally toothed stop-ring a fixed to the
frame in combination with a tappet or driver-cross c mounted loosely on the
intermediate shaft D between the projections of the disc band to which is secured
a toothed wheel z driven by a toothed wheel on the driving or crank-shaft
whereby on the rotation of the crank-shaft for winding up the load the cross e gains
upon the disc b and therefore each time lifts the pawls lying in front of the arms
of the cross out of engagement with the stop-ring a thus causing a rotation of the
intermediate shaft D while the pawls lying behind the arms of the cross slide over
the stop-teeth and again drop into engagement therewith so soon as the lifting
motion of the crank is arrested substantially as described and illustrated in the
accompanying drawings.
2. The combination and arrangement of parts constituting the complete
automatic stop motion substantially as described and illustrated in the accom-
panying drawings.
Dated this 16th day of August 1895
BOULT & WADE,
Agents for the Applicant.