Improvements in Brahmah Locks
Year: 1897

page_text: Date of Application, 14th Oct., 1897-Accepted, 4th Dec., 1897
UOMI LEIE DI BUITIVATION.
"Improvements in Brahmah Locks."
I, GUSTAV FUCHS, of 11, Ammerlingstrasse, Vienna, Austria, Manufacturer, 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 has for its object to provide a key which can be set to fit a number
of Brahmah locks having each different lengths of sliders, by providing means for
varying the depth of the slots in the key conform with the length of the sliders in
the lock.
And in order that my invention may be more fully understood I have caused to be
appended hereunto one sheet of drawings, marked with letters of reference
indicating like parts in the various figures, showing my improved Brahmah key at
an enlarged scale, Fig. 1 being a perspective view, Fig. 2 a longitudinal section at
line x-x of Fig. 1, Fig. 3 a section at the perspective line y-y of Fig. 1, Fig. 4 a
cross section at line of Fig. 2, Fig. 5 a longitudinal section of one of the collars,
and Fig. 6 a perspective view of a slot slide.
In carrying out my invention and referring to the figures generally, I form in the
periphery of the key spindle m a number of grooves in which are adapted to move
longitudinally a corresponding number of slot slides a, b, c, d, f, of different
lengths, the ends of which opposite to the key handle are formed with screw teeth t
which project from the periphery of the key spindle m.
On the latter are placed a number of nuts a, b, c, d, f¹, which have a quick
thread and are longitudinally retained in position by means of collars g fixed onto
the key spindle.
The lengths of the said slides are so chosen, that the toothed end t of a gears
with the nut a¹, that of b with 6', that of c with c¹, that of d with d¹, and that of ƒ
with f¹, which latter is next to the key handle.
The two outer collars g, g, are connected together by means of two rails n & k
extending over a portion of the periphery of the nuts a¹, b, c, d, f¹, n having a
longitudinal slot and at its inner side spring which correspond in number with
that of the said nuts and have at their free ends each an indent k² adapted to engage
in koles formed in the respective nut.
The periphery of each of the said nuts is divided into ten equal parts and
numbered successively 0-9 in such a manner that when the cipher of any of the
said nuts is below the said rail slot the outer end of the respective slot slide is flush
with the end of the key spindle m.
Thus if one of the said nuts is turned one division, the respective slot slide will
be caused to project from the end of the key spindle in distance equal to the turn
given to the nut and amount of its pitch, the number of divisions turned being seen
through the slot in the rail n, and the depth of the slots between the said "slides
thus altered to suit the length of the sliders in the lock which enter the said slots.
Each nut a¹, b, c, d, f¹, is retained in the position indicated by the number
exposed through the slot in the rail n, by means of a spring k¹ fixed to the inner

page_text: side of the rail k and formed at its free end with an indent which engages in a
corresponding hole formed in the periphery of the respective nuts.
It will thus be understood that each different position of the slot slides a, b, c, d, f,
indicates a certain number exposed by the said slot, which corresponds with a certain
construction of lock.
Having now particularly described and ascertained the nature of my said Inven-
tion, and in what manner the same is to be performed, I declare that what I
claim, is-
A Brahmah key adapted to fit a number of Brahmah locks having each
different lengths of sliders, consisting of a key spindle m on which slot
slides a, b, c, d, f, are rendered relatively adjustable, all substantially as set
forth.
"
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.