An improved Door-by.
Year: 1895

page_text: An improved Door-by.
I, WILLIAM ARTHUR ROE of 57 Norton Street, Spitalgate, Grantham, Joiner
do hereby declare the nature of this invention to be as follows:-
:-
This invention refers to the keys of rim mortice and other locks, which have
their "bits" attached to solid "pins," and is designed to prevent burglars or thieves
from turning the doorkey round from outside the door, (when locked on the inside,)
by means of pliers. It also prevents any attempt to remove the said key with a view
to insert another in its place.
It consists in placing upon the end of the pin or stem, a small tubular collar or
swivel which revolves freely on the said pin, and is held in place by burring over
or rivetting down the extreme end of the pin. The collar is thick enough to
project beyond the burr on the pin, and this burr is recessed into a countersunk
depression in the end of the collar, so that it is impossible to operate on the pin,
because of its protection by the collar.
Dated this 25th day of February 1895.
S. S. BROMHEAD,
97, Newgate Street, London, Agent for Applicant.
I, WILLIAM ARTHUR ROE of 57 Norton Street, Spitalgate, Grantham, Joiner,
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 refers to the keys of rim, nortice and other locks, which have
their "bits" attached to solid "pins," and is designed to prevent burglars or thieves
from turning the door key round from outside the door, (when locked on the inside)
by means of pliers. It also prevents any attempt to remove the said key with a
view to insert another in its place.
It consists in placing upon the end of the pin or stem, a small tubular rotating
collar or sleeve, which revolves freely on the said pin, and is held in place by
burring over or rivetting down the extreme end of the pin or by a pin passing
through said collar and entering a hole drilled in end of key, where it is fastened
by a transverse screw or rivet. The collar is thick enough to project beyond the
burr on the pin, and this burr is recessed into a countersunk depression in the end
of the collar, so that it is impossible to operate on the pin, because of its protection
by the collar.
In the accompanying drawings,
Fig. 1 shows an ordinary key fitted with my improved revolving cap.
Fig. 2 shows an enlarged longitudinal section of the outer end of key, and

page_text: a, is the stem of the key.
a', is the pin end of the key.
b, is the revolving cap.
(Fig. 2) is a spindle with countersunk head inserted into the end a' of the key a
and held in place by a cross pin or screw d. This spindle carries the revolving
cap b.
is a cross pin or screw by means of which the spindle c is held in place at the
outer end of the key a hole being drilled to receive it.
e (Fig. 3) is a prolongation piece at the end of the key a', of smaller diameter
than the stem a, around which the cap is placed. The end of this piece e, is then
burred over so as to form a countersunk rivet-head to keep the cap b, in place.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed declare that what I
claim is
In a door key a revolving tubular collar or sleeve at the end of the key, working
freely thereon, or on a pin attached thereto; said collar being fastened thereto by
means of a suitable rivet-head or burr on the end of said pin.
Dared this 22nd day of March 1895.
S. S. BROM'HEAD,
97, Newgate Street, London, E.C., Patent Agent.
S. S. BROMHEAD,
97, Newgate Street, London, E.C., Patent Agent.