Improved Permutation Lock.
Year: 1899

page_text: Date of Application, 29th July, 1899- Accepted, 2nd Dec., 1899
Improved Permutation Lock.
I, OTTO SCHOELLER, of 147, Moltkestrasse, Cologne on the Rhine, in the Empire
of Germany, Engineer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
The subject of the present invention is an improved permutation lock, which
can be adjusted to any desired combination of letters figures or numerals for
the purpose of operating the lock or bolt and after such letters, figures or numerals
are displaced can only be operated again when those formerly chosen or pre-
determined are put together anew. In the accompanying drawings Figures 1
and 2 are longitudinal sections shewing different positions of the bolt, Figure 3
a cross section, Figure 4 an elevation, Figures 5 and 6 longitudinal sections of
a modification in construction of lock with different positions of the bolt,
Figure 7 an elevation, Figures 8 to 11 cross sections on the lines I to IV of
Figures 5 and 6.
The arrangement of the lock shown in Figures 1 to 4 is as follows:-
The bolt A is carried in a support B which is attached to a plate C supported
or fixed for example in the wall of the opening and closing part of a cup-board.
This bolt is provided with projections a which correspond to as many pairs of
rings R placed within one another. Both rings are coupled together by means
of springs with slightly raised points or knobs f, and the strength of the spring
is chosen so as to insure that the outer ring can be turned alone when the inner
one is held firmly, whilst however when the latter is not held firmly the outer
ring takes the inner one round with it under the influence of said spring. The
inner rings have in their interior, running all round, hollows or interstices g,
whilst the remaining part h of the rings r adjoining the grooves has at one place
a slot i in which the projections a of the bolt can enter as soon as these slots i
are brought in a corresponding position to the projections a; then the position
is obtained which is shown in Figure 1.
The mode of using the lock is as follows:-
:-
Supposing the lock to be in its open or unlocked position. Figure 1 shows
this position. The projections a of the bolt A stand in the slots of the inner
rings and hinder these from participating in the turning round of the outer
rings R. If now the rings R are set to a certain number or combination of
figures this number or combination of figures on the separate rings will
correspond with the position of the slots i of the inner rings r. If
now
the bolt A is drawn out of the lock, that is to say brought into
the closed or locked position, the outer rings R can then take the
inner ones with them when turned round and with the figures outside, the
slots inside will also be displaced so that the projections a of the bolt A press
against the part h of the rings r when an attempt is made to bring the bolt A
into the position shown in Figure 1. This position can only again be arrived
at, when the slots of the inner rings occupy the position which corresponds

page_text: placed in their right position, permit of the bolt A being moved by means of
the projections a on the latter entering into the slots i of the inner rings r sub-
stantially as described with reference to the drawings.
Third. In that class of permutation lock as claimed in first claiming clause
hereof; the arrangement of pairs of rings and R adjoining one another, of
which one set of rings is movable and have the numbers or figures on their
peripheries as well as inside a corresponding number of slots o, whilst the
other set of rings each with only a slot is attached to the box or casing B,
so that the projections a situated on movable rings m on the bolt A, coming out
of the slots i catch in any desired slot o of the movable ring R, from which they
can only be got back, when the loose rings R occupy again their intended posi-
tion, that is to say, when they are set to the number chosen, substantially as
described with reference to the drawings.
Dated th: 20th
STI
1000
O. SCHOELLER.
Per W. H. Beck,
Agent, 115, Cannon Street, London, E.C.