Braking Apparatus.
Year: 1898

page_text: Date of Application (in United Kingdom), 31st Mar., 1898
Complete Specification Left, 29th Dec., 1898-Accepted, 4th Feb., 1899
PROVISIONAL SPECIFICATION.
PROVISIONAL SPECIFICATION.
Braking Apparatus.
We, LA SOCIETÉ GUYENET ET DE MOCOMBLE, of 83, Boulevard Magenta, Paris,
France, do hereby declare the nature of this invention to be as follows:
This invention relates to lifts worked by an electric winding mechanism actuated
for the ascending motion by a dynamo, with starting resistance commutator or
rheostat.
The present improvements consist in the employment of a mechanism which
effects automatically the completion of the motion of the starting commutator
or rheostat after this has been actuated to a slight extent by hand for the com-
mencement of the upward motion, while at the same time affording the winding
apparatus the advantages of a regulated and smooth working.
For this purpose the contact arm or switch of the resistance commutator is
connected by suitable means with an arm on a shaft carrying a lever which, when
the lift is at rest, projects in a direction slightly above the horizontal and has
its free end connected on the one hand to a vertical rod passing up to the top
of the lift frame where it is connected to any known arrangement of actuating
mechanism that is worked by a cord passing through the lift cage in the known
manner. On the other hand the lever is also connected to the piston of a
hydraulic or oil brake cylinder whereby its downward motion is controlled. This
lever has extending along its underside a bar on which is mounted a weight with
wheels by which it can readily run from the one end of the bar to the other.
The lever being, as above stated, slightly inclined above the horizontal when
the lift is at rest, the weight will then be situated immediately under its fulcrum,
and will consequently have no action tending to move the lever downwards.
When the lift is to be started on its upward motion, a slight downward pull of
the cord will cause the upper actuating gear to depress the lever slightly below
the horizontal, whereupon the weight will roll along from the fulcrum end to
the other end of the lever and in thereby causing it to descend slowly under the
controlling action of the hydraulic brake, it will automatically effect the move-
ment of the commutator switch to the end of its path so as to actuate the dynamo
in the required manner for winding up the lift cage.

page_text: On the cage approaching the upper end of its motion, it is made to operate by
means of tappets the upper actuating gear so as to cause the vertical rod to raise
the weighted lever slightly above the horizontal again, thereby bringing the rolling
weight back to its original position under the fulcrum and in bringing back the
commutator switch to its original position, to stop the winding apparatus.
On raising the weighted lever beyond the position described, its shaft effects
tthe opening of the escape valve on the hydraulic cylinder in which works the
plunger attached to the underside of the lift cage, so that the latter can now descend
by gravity in forcing the water out of its hydraulic cylinder.
Dated this 31st day of March 1898.
ABEL & IMRAY,
Agents for the Applicants.
Improvements in Lifts worked by Electricity; with Hydraulic
Braking Apparatus.
We, LA SOCIETÉ GUYENET ET DE MOCOMBLE, of 83, Boulevard Magenta, Paris,
France, 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 lifts worked by an electric winding mechanism actuated
for the ascending motion by a dynamo, with starting resistance. commutator or
rheostat.
The present improvements consist in the employment of a mechanism which
effects automatically the completion of the motion of the starting commutator
or rheostat after this has been actuated to a slight extent by hand for the com-
mencement of the upward motion, while at the same time affording the winding
apparatus the advantages of a regulated and smooth working, as we will describe
with reference to the accompanying drawings.
Fig. 1 shews a general view of the lift controlling mechanism in elevation while
Fig. 2 shews the same in plan. Fig. 3 is a side elevation to an enlarged scale
of the rolling counterweight device which automatically completes the motion of
the commutator.
The lever arm has its centre of motion on the shaft and carries a bar t
forming a rolling path for a movable counterweight (shewn in end elevation
at Fig. 3*) provided with rollers which enable it to travel readily on the bar ;
its weight may be regulated by means of supplementary discs so that its action
may overcome the friction of the parts of the working mechanism.
When the lever is at rest in a position corresponding with the stopping of the
lift the arm is directed slightly above the horizontal as shown in full lines
(position I) in Figs. 1 and 3, so that the counterweight y, in this position of the
lever arm, is below the shaft and is thus of no effect.
The free end of the lever arm k is connected with the rod ; which passes up to
the top of the lift where it is connected to any known arrangement of actuating
mechanism worked by a cord i passing through the lift cage in the known manner.
When the lift is to be started in its upward motion, a slight downward pull
of the cord i will cause the upper actuating gear through the rod j to depress
the lever arm k slightly below the horizontal, whereupon the counterweight
will roll along from the fulerum end of the arm k to the other end ¹ where it
will be brought to rest by a stop p.

page_text: The lever arm is thus caused to descend slowly under une
hydraulic or oil brake consisting of a cataract cylinder t whose piston is connected
y a rod to the rod j.
When the lever arm has descended to its lowest position, shown in full and
otted lines respectively at II in Figs. 1 and 3, it will have pulled the commutator
ever to the end of its path through the intermediary lever arm m and link o,
hus actuating the dynamo r and winch T in the manner required for winding up
the lift cage.
On the cage approaching the upper end of its motion it is made to raise the
rod by means of tannets and thus to bring the lever arm k into its former position
j
at I slightly above the horizontal, the weight y thereupon rolls slowly back to its
position beneath the shaft and the switch lever q is returned to its original
position and the winding apparatus is stopped.
When the lever arm is raised beyond the position shewn at III Figs. 1 and 3 a
cam on the shaft 7 opens the escape valves on the discharge pipe of the hydraulic
cylinder a in which works the plunger b attached to the underside of the lift
cage so that the latter can now descend by gravity forcing the water out of its
hydraulic cylinder.
By the above described arrangement of starting mechanism for the electric
winding apparatus T actuated by the dynamo r the action of which is controlled
by the lever in combination with the hydraulic brake ¹t, we have been enabled
to employ a starting commutator of very simple construction.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed, we declare that what
we claim is:-
In a lift worked by electricity with hydraulic braking apparatus, a lever for
actuating the resistance commutator or rheostat for starting the electromotor,
which lever is normally in a position slightly above the horizontal and carries
a sliding or rolling weight so arranged that normally it is situated under the
35 fulcrum of the lever while on moving the lever slightly below the horizontal
for effecting the upward motion of the lift, the weight travels from the fulcrum
end to the free end of the lever, and thus causes this and the commutator switch
to complete their motion under the control of a hydraulic brake, substantially
as described.
00th day of December 1898.