Improved Locking Contrivance for Miners' Lamps.
Year: 1899

page_text: Date of Application, 30th Jan., 1899-Accepted, 6th Jan., 1900
COMPLETE SPECIFICATION.
Improved Locking Contrivance for Miners' Lamps.
We, LUDWIG BECKMANN, of 5, Schulstrasse, Schalke, Brazier, and-AUGUST SINA-
GOWITZ, of 9, Vereinstrasse, Gelsenkirchen, both in the Empire of Germany,
Miner, 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;-
The object of this invention is a contrivance for locking miners' lamps, which
can only be operated by the key belonging thereto, so that the removal of the
upper part of the miners' lamp can only be effected by such persons as are in
possession of the key. Hereby an advantage is obtained, which is not presented
even by the esteemed magnetic locking contrivances.
As it is known that numerous and often serious calamities are caused by the
improper or careless opening of miners' lamps, the utility and importance of an
apparatus which can only be operated by an authorized person, will be at once
recognised.
The object of the invention is illustrated in the accompanying drawings, in
which:-
Fig. 1, is a section through the longitudinal axis of the miners lamp.
Fig. 2, separate or special view of the locking parts with the lamp closed.
Fig. 3, section along the line X, X, in Fig. 1, in elevation in the direction of
the arrow I.
Fig. 4, a view of the locking parts in their position for opening the lamp.
The illustration in Fig. 1, represents the miners' lamp closed by the bolt m
and shows clearly that the upper part of the lamp which is connected with the
lower by screw threads, cannot be unscrewed as long as the bolt m engages in
the projection on the flanged border of the upper part of the lamp. This engage-
ment is regulated by the spiral spring f, which presses the cylindrical shaft a of
the bolt m upwards, lying, itself, with its upper end against the ring and with
its lower end against the ring e.
The ring
n is placed loosely over the sleeve b
which latter is connected by means of the spirally arranged pins o, p, q, ", o¹,
Pq, r, so as to form a firm whole with the outer sleeve or casing h.
piece h again is firmly connected by soldering or in other preferred manner, with
the sleeve or casing e, which is attached directly to the lower part of the lamp
and receives the whole locking apparatus.
This
The shaft a of the bolt is furnished at its lower end with a pin g, which moves
with its two overlapping ends in slots s, formed in the sleeve and thereby allows
the shaft of the bolt to move in a vertical direction only but not to turn. With
angular slots, as formed in so-called bayonet fastenings, (see Fig. 2), the lower
surface of the ring e lies on the upper edge of the sleeve h, at the same time
enclosing the ends of the pins g. Close underneath the bolt m a pin d is inserted
in its shaft a, the two overlapping ends of which pin lie in two diametrical slots
in the upper end of the casing b. Against this pin the spiral spring of presses
with the aid of the ring n, in such a manner that the bolt m is constantly retained
ГРайло 911

page_text: in its position of engagement so long as it is not moved downward by the pulling
of its shaft a.
For the purpose of opening the lamp, the indicated downward movement is
effected as follows:-
<<
"
23
The key y is introduced into the tube-shape space formed between the two
casings band h, and which, as already mentioned, is crossed by the spirally
arranged pins, the key being furnished with recesses upper diametrical slots t
and as well as with two teeth" and and four " gaps. The key thus
formed is placed at the height and in the position shewn in Fig. 2, it being as
a matter of course necessary that the key should be suitably turned and alter-
nately pushed upwards, in order to pass the spirally arranged pins, which
naturally are only arranged with the object of preventing the lock from being
opened like those of other miner's lamps by any key which is not furnished with
precisely corresponding recesses, or by a piece of wire, which might be intro-
duced into the hollow space between the casings b and h, for moving the bolt m.
When the key y has been brought into the position shewn in Fig. 2, the next
point is to bring its parts and over the ends of the pin g, as in Fig. 4, as
it is only by taking hold of the shaft a of the bolt with the key y that the bolt
can be drawn downwards. In order to reach the position shewn in Fig. 4, the
following steps have to be taken. The key y (see Fig. 2), is pushed up to the
in such
2
a manner that its gaps
extent of
29
lie over the
** teeth k on the ring, the key together with the ring e is
then turned in the direction of the arrow 2 in Fig. 2, so that the slots, on
the ring e and the corresponding slots t, t in the key y lie directly below the
ends of the pin g. The key, together with the ring e, can then be pushed
upwards, and until the lower edges of the "teeth", stand tangentiably over
the ends of the pin g. Hereupon, it is only necessary to give the key another
turn in the opposite direction to the arrow 2 in Fig. 2, in order to reach the
position shewn in Fig. 4, and, in which, as a matter of course, the spring fis
compressed, as the latter yields, as required upon the key being pushed upwards
in the manner explained. It is obvious that the "steps" in the key y must
have the requisite clear height and breadth, in order that the described movements
may be carried out, in connection with which it should be noted that the degree
of vertical displacement of the key is determined by the distance of the pins o o¹
from the pin y, when the latter lies on the upper ends of the slots, and that the
said distance v must be established in the steps of the key as shown in Fig. 2.
As long as the key is not drawn downwards, the bolt m naturally remains in
its position of engagement represented by Fig. 1, although the spiral spring
according to Fig. 4, is in its compressed condition; for in this position also the
ping will lie on the upper ends of the slot s, because the spring f. exercises
uniform pressure on both sides, that is to say, as well against the ring n, or in
other words, the pin d as against the ring c. If however, the key y be drawn
downwards, its movement is followed by the bolt m, as the shaft a of the latter
is complete with the key, by means of the pin y and the "teeth", as shewn in
Fig. 4.
It is self evident that the pull on the key y which releases the bolt m must be
continued until the upper part of the lamp is completely unscrewed from the
lower part, and that the removal of the key y from the tube shape hollow space
between the two sleeves b and after the locking of the lamp is effected in the
same manner as was explained in connection with its insertion.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed. I declare that what
I claim is:-
:-
1. The improved lock for miners' lamps, in which a locking bolt under spring
influence is released by means of a special key y, the distinguishing feature being
the arrangement on the shaft a of the bolt, of pins g which engage in the manner

page_text: of a bayonet fastening in corresponding slots of a ring e which is turned by
means of the key and lies in the locking position on a fixed sleeve or casing b,
substantially as shewn and described.
2. In the lock mentioned under Claim 1, the arrangement of a suitable space
for the insertion of the correspondingly tube-shaped key, this space being formed
by an outer and an inner sleeve h, b, between which pins o, p, q, r, and o¹, p², T', r
are spirally arranged the key being formed with suitable recesses for enabling
it to pass such pins substantially as shewn and described.
Dated this 30th day of January 1899.
HUGHES & YOUNG,
55 & 56, Chancery Lane, London, W.C., Agents for Applicant.