A Combined Safety Bolt and Chain.
Year: 1890

page_text: Date of Application, 29th Oct., 1890-Accepted, 29th Nov., 1890
A Combined Safety Bolt and Chain.
I, EDMUND GÜNTHER, of 7 Scariastrasse, Blasewitz, near Dresden, Saxony, in the
Empire of Germany, Manufacturer, do hereby declare the nature of iny said 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 my invention is to manufacture an improved form and arrangement
of bolt and chain for securing doors and other articles, the invention being adapted
for use either as a bolt or a chain.
And in order that my said invention may be particularly described and ascertained,
reference is hereby made to the accompanying drawings, in which similar letters of
reference indicate corresponding parts.
Fig. 1 is a plan view of my invention, the bolt being shown fastened.
Fig. 2 is an elevation of the same.
Figs. 3 and 4 are a plan and elevation, showing the invention in use as
chain.
Figs. 5 and 6 are a plan and elevation, showing the invention unfastened.
Fig. 7 is an end view of Fig. 2.
Fig. 8 is an end view of Fig. 3.
Figs. 9 to 14 are detail views.
a
The combined safety bolt and chain consists of a flat bolt g. This bolt is fitted
with links and 9, the link g' being pivoted to a bracket m, the latter being
secured to the door or door frame by means of the plate p. This bolt is fitted with a
spring and has a projecting catch n at its outer end. is a projection upon
the links to prevent the alignment of the links. p' is a plate fitted to the door
frame or door, having a slotted box staplo o. k is a hook pivoted to the plate p
at 1, for securing the links g g' and g² in position, as shown in Figs. 1, 2, 5, 6
and 7.
In the drawings the invention is shown as applied to double doors or windows, but
it obvious that it is equally applicable to single doors and windows, and other
analogous articles. Also the bracket o may be fixed either to the door or door
frame.
-
The action of the apparatus when used as a bolt, is as follows:-
n
The link g is pushed through the sloto until the catch is secured on the outer side
of the box staple o with the aid of the spring f. The links are then folded together,
as shown in Figs. 1, 2 and 7, and the hook k is placed in a horizontal position, as
shown.
In using the invention as a safety chain, as shown in Figs. 3, 4 and 8 the link is
secured in the slot o as before, and the hook k is raised to a vertical position; the
links g g² are then capable of extension, as shown in Figs. 3 and 8. The projection h
prevents the alignment of the links gg2, and thus prevents the links becoming obstacles
to the closing of the door.
When the device is not in use, or it is intended to fully open the door, the bolt g
and links gl and g² are folded together, as shown in Figs. 5 and 6, the hook k securing
them in such position.
Fig. 9 is a detail side view of the box staple o and plate p².
Fig. 10 is a detail side view of the hook k.
Fig. 11 is a side view of the plate p with the plates and m attached.
D
13 10

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, 1 declare that what I
claim is: --
1. A combined safety bolt and chain consisting of a bolt g and links g¹ g² pivoted
to the arm m, the bolt being formed to lock into the box staple o by means of the
catch n and spring; and the links g¹ g² being capable of being locked in position by
the hook k, all severally operating substantially as hereinbefore and illustrated by the
drawings.
2. The general construction, combination and arrangement of the several and
respective parts, together forming my invention of a combined safety bolt and chain,
substantially as hereinbefore described and illustrated by the drawings.
1.50
1000
GEO. DOWNING,
8, Quality Court, London, W.C., Agent for Applicant.
1005 A
GEO. DOWNING,
8, Quality Court, London, W.C., Agent for Applicant.