Improvements in Brakes
Year: 1886

page_text: We FLORIAN TENTSCHERT of No. 1 Plössilgasse, Civil Engineer and FRIEDRICH
WILHELM MINCK of No. 4 Pestalozzigasse, Merchant, both of Vienna in the
Empire of Austria 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:-
Our present Invention relates to Improvements in Brakes for railways, tramway
and other cars or vehicles as well as for brake discs for machinery which brakes
are characterised by their instantaneous efficient action and by their simple and
economical construction. In order that our Invention may be fully understood we
shall now proceed particularly to describe the same reference being had to the
annexed sheet of drawings in which the same letters indicate the same parts in
both figures.
Figure 1 is a side view partly in vertical section of our improved brake.
Figure 2 is a front view of the same partly in vertical transverse section.
Our instantaneous brake is arranged as follows:-
The brake screw a has a nut b thereon the screw being supported in a bearer C
dd are two sliding-levers provided with the slot or guide f and connected at their
upper part with the nut b of the brake screw a and with the brake rod S as
shewn.
The bearer C is provided with a fixed pivot z supporting the two rollers or
pulleys which engage in the slots f and guide the two sliding levers & d.
Our brake works as follows:-
When the brake-screw a is turned to the right hand, the nut b of the said screw
and consequently the sliding-levers d d are drawn upwards whereby the said levers
are turned around and simultaneously displaced in their position relatively to the
fixed pivot z. In consequence of this combined movement of the two levers d d
around the common fulcrum z and in consequence of the alteration in the lengths
(due to this movement) of the lever-arins between the pivot z the nut b and brake
rod s the brake rod 8 is inoved so that the brake blocks approach instantly to the
wheels or discs as is indicated by the dotted position of the pivots or trunnions g¹
and h¹.
If the brake screw a be further turned to the right further displacement of
the sliding levers d d occurs and the projection of the lengths of the lever-arms

page_text: between z, 6 and 8 changes accordingly. In a certain position of the sliding-
levers d d these lengths will be equal and on further displacement of the sliding
levers the above mentioned projection will become an inverse one, that is to say;
the distance between z and becomes greater than that from z to g² as is clearly
seen from the position of the pivots indicated in dotted lines at g2 and h².
It follows that the brake-blocks can be firmly pressed against the wheels.
In order to facilitate the adjustment and application of the brake to the carriage,
the brake-rod & may be provided with a pin or forelock or with a double-nut of
right and left handed thread.
Our improved brake may be used with only one lever d and the said lever or
levers may be indirectly connected with the nut b and brake-rod 8. In lieu of the
rollers rr sliding-blocks may be used which fit in the slot f of the sliding-levers d d
and are mounted on the fulcrum or pivot z.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed we declare that what
we claim is :-
An instantaneous brake for railway tramway and other cars or vehicles and for
brake-discs for machinery consisting of one or two sliding levers d d provided with
the slot or guidef and disposed on a fulcrum or pivot z around which they can be
turned and simultaneously displaced as described in combination and connection
with the nut b and the brake rod s in such a manner that the proportion of the
lever-arms between the fulcrum or pivot z and the points g and h and is varied
constantly when the brake screw is turned substantially as hereinbefore described.
Dated this 11th day of October 1886.