Improvements in Combination Safety Looks.
Year: 1893

page_text: Date of Application, 28th Apr., 1893-Accepted, 2nd June, 1893
COMPLETE SPECIFICATION.
Improvements in Combination Safety Looks.
I, JACKOB OSTERTAG, of Aalen, in the German Empire, Safe & Lock
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 relates to a triple combination safety lock, which is most simple
and durable and will resist any attempt at being unduly opened. The mode of
setting this combination lock, compared with others, is also exceedingly simple and
secure and it may be particularly remarked that in setting, owing to two of the
combinations being always permanent, only that number to which it is desired to
set determines the triple combination and therefore obviates the writing down of
four, five and six combinations.
The novelty of this construction of combination safety lock is―
1. The compound action of three adjustable discs in such a manner that the
positioning of such discs is effected from the intermediate disc and one of the outer
discs comes only into operation after two revolutions of the intermediate disc.
2. Simple method of setting the combination.
3. The method of setting in general.
4. The employment of this lock separately or in combination with any other
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.
Fig. 1 shows the lock complete, employed in connection with a second lock
inserted into a door.
Fig. 2 shows four different views. 24 being the intermediate disc with adjuster
and carrier pin. 2B the outer adjustable disc which comes into operation after
the intermediate disc has made two revolutions by means of the ring let into the
same. 2 the second outer adjustable disc. 2 knob with dial.
This lock may be employed in connection with any other or by itself.
In the first case the combination lock is fastened onto a second lock and simul-
taneously therewith inserted into the door and the second lock can then only be
opened after the combination lock has been set, as a projection on the bolt shank
enters slots in the adjustable and intermediate discs of the combination lock and
the bolts therefore can only be slid back afterwards..
In the second case the combination lock is secured directly onto the door and
the bolt shank in connection with the main bolt has a projection which may freely
move after the combination lock has been properly set whereby the main bolts
moved by the knob may be released.
The relative action of the separate parts of the combination lock is as
follows:-
By means of the knob b on the adjuster a the intermediate plate c is turned
more than twice to the left or right and by means of its carrier pin will take with
it during its first revolution the ring flet into the adjustable disc d and during its
second revolution the latter itself.
Now if after the second revolution of the intermediate plate c, i.e. its knob, the
adjustable disc d has been brought into such a position, that its gap is opposite the
projection g of the lock or main bolt shank, the second adjustable disc e is brought
into position to correspond with the said projection after having turned the knob in
a reverse direction, i.e. the intermediate disc not less than one and not more than

page_text: two revolutions and by a partial turn of the knob, i.e. the intermediate disc, in a
direction reverse to the last named revolution, the same is also set as required.
The projection g is then free to move, i.e. the door can be opened, may it be by
the direct sliding of the main bolt having a knob to turn or by a second safety
lock.
It may be here remarked that the sides m retain the adjustable discs, in such a
manner, in position that the same can only be turned by the carrier pin of the
intermediate disc e.
The setting of the combination lock, which can be only effected when the door
is open and after the insertion of the bolt projection g, is as follows:-
The adjuster a by means of its head can be drawn out of the disc e and
positioned concentrically into the bore of the adjustable disc d after unscrewing
the safety screw h.
By means of the knob b the adjuster can then be turned freely and moved again
in any desired position into the intermediate disc.
The outer dial connected with the knob, has got the same divisions as the inner
disc and adjuster and is thus on setting that division number to be observed, at
which the adjuster a is slid into the intermediate disc.
If the safety screw is screwed fast again and the door closed, the combination
lock can only be brought into the opening position again, by taking into considera-
tion the division number set and its initial combination, which depends on the
width of the ring projection f, Fig. 2B, and on the distance of the gap k in the
disc e.
Having now particularly described and ascertained the nature of this inven-
tion and what manner the same is to be performed, I declare that what I
claim, is-
1st. A triple combination safety lock, characterized by the moving of two discs
by means of an intermediate disc, in such a manner that one disc can be brought
directly into a predetermined position and the other by a ring guided therein after
two revolutions of the intermediate disc, substantially as set forth.
2nd. The adjustment of the combination when the door is open, by means of the
adjuster in the intermediate disc, substantially as set forth.
3rd. Obtaining various initial combinations in the lock specified above by
forming in one of the adjustable disc various ring recesses aud in the other various
widths of ring projections, substantially as set forth.
Dated this 27th day of April 1893.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.