New or Improved Locking Device for. Spring Safety Hooks: or the like.
Year: 1895

page_text: Date of Application, 1st June, 1895
Complete Specification Left, 22nd Feb., 1896-Accepted, 28th Mar., 1896
PROVISIONAL SPECIFICATION.
New or Improved Locking Device for. Spring Safety Hooks:
or the like.
We OTTO FECHNER, Watchmaker, and CARL MIHATSCH, Photographer, both of
Great Strehlitz, Ober Schlesien, in the German Empire do hereby declare the nature
of this invention to be as follows:----
Our invention consists of a new or improved locking device for spring safety hooks;
or the like which when in operation prevents the tongue or pivotted arm from.
being moved and thus ensures perfect safety.
Upon the movable arm or tongue of the safety hook is mounted a turnable
sleeve, cut or hevelled at its upper end to correspond with the angle of the
meeting edges, and provided with a notched ring or the like at any convenient part.
of its length to facilitate turning with the fingers. The sleeve is prevented from
turning through more than a semicircle by means of a peg in the tongue engaging
in a slot in the turnable sleeve. Said sleeve is also provided with slots whereby
spring flaps are formed which when bent slightly inwardly bear against the tongue,
and by their friction prevent accidental turning of the sleeve.
It will be seen that on the hook being closed, and the sleeve turned through
half a revolution, the latter will slightly overlap the junction of the hook and the
tongue and thus effectually prevent the tongue from being pressed inwards, but.
on being turned again it may be easily opened.
Dated this 31st day of May 1895.
STANLEY, POPPLEWELL & Co.,
7 & 8 Southampton Buildings, London, W.C.,.
Agents for the Applicants.
New or Improved Locking Device for Spring Safety Hooks
or the like.
We, OTTO FECHNER, Watchmaker, and CARL MIHATSCH, Photographer, both of
Great Strehlitz, Ober Schlesien, in the Empire of Germany, 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 invention consists of a new or improved locking device for spring safety hooks
or the like, which, when in operation, prevents the tongue or pivotted arm from
being moved, and thus ensures perfect safety.
On the accompanying sheet of drawings, our invention is represented as applied to
a hook for a watch chain, and Figure 1. shows the hook in position to be opened, and
Figure 2. the same when closed and locked.
Upon the movable arm or tongue a of the safety hook is mounted a turnable
sleeve b cut obliquely at its upper end to correspond with the angle of the meeting
edges, and provided with a notched ring e or the like at any convenient part of its
length to facilitate turning with the fingers. It will be seen that the sleeve b, when in
the position shown in Figure 1., will allow the tongue to be pressed in; but on turning
[Price &dl

page_text: said sleeves, the tongue becomes locked. The sleeve b is prevented from turning
through more than a semicircle by means of a peg d in the tongue, engaging in a
slot c in the turnable sleeve. Said sleeve may be slotted as at thus forming spring
flaps, which, when bent slightly inwardly, bear against the tongue, and by their
friction prevent accidental turning of the sleeve.
As shown in Figure 1., a peg 9 may be inserted in, or formed upon the flat face of
the closing tongue a fitting into a corresponding hole in the face of the hook, so
keeping the meeting surfaces in true position.
Having now particularly described and ascertained. the. nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
:-
The locking device for spring safety hooks or the like, consisting of a turnable
sleeve b surrounding the movable tongue a, so shaped that when turned upon its axis
in one position, as in Figure 1., it permits of the opening of the hook; and in the
other position, as in Figure 2., it keeps the hook securely closed, substantially in the
manner hereinbefore described.
STANLEY, POPPLEWELL & Co.,
7 & 8 Southampton Buildings, London, W.C.,
Chartered Patent Agents.