Improvements in Bolts for Doors, Gates, and other Objects.
Year: 1889

page_text: Date of Application, 17th Aug., 1889
Complete Specification Left, 12th May, 1890-Accepted, 19th July, 1890
PROVISIONAL SPECIFICATION.
Improvements in Bolts for Doors, Gates, and other Objects.
I HORACE BEAUMONT, of Underriver, Seal, near Sevenoaks, in the County of Kent,
Blacksmith, do hereby declare the nature of this invention to be as follows:-
Bolts constructed according to my invention are made with a secret or not
observable locking appliance mainly for the purpose of preventing the unauthorised
opening by children and other persons.
The bolt is made tubular or with a recess from the back or door end to within some
distance from the other end. Within the bolt is provided a locking bar having a peg
or projection which when the bar is turned can act against a catch on an escutcheon
or plate upon which the staple or housing or housings of the bolt on the door are
fixed. This catch is under one of the said housings so as to be out of sight and
projects through a slot in the tubular bolt. A cross peg or other stops are provided
to limit the extent of turning of the locking bar in each direction, and the end of the
locking bar has a head which is flush with the door end of the bolt so as to appear
as part of same. When the bolt is pushed forward into the closing position and it
is desired to lock it in that position the head of the locking bar is turned whereby the
projection on it comes against the further side of the stop and the bolt is prevented
from being drawn back. Similarly the bolt may be made to lock in the open or
withdrawn position. The projection on the locking bar may be a plain peg, or a disc
with a slot in, wide enough for the stop to pass through when set fair with it. The
head of the locking bar being flush with the outside of the bolt and the head fitting
close against the end of the bolt it looks like a part of the bolt itself except on very
close examination and even then its use is not suspected; moreover if the other end
of the bolt is formed to look exactly like it, the bolt appears to be merely ornamented
at each end with a very narrow line all round, done by a turning tool. Or the
locking bar may be turned in the bolt by other means such as a key inserted through
a hinged or other lid provided at the end of the bolt, but so as to be invisible or nearly
so from without.
Bolts so constructed are applicable to doors, gates window sashes, drawers, lids and
the like.
Dated this 17th dow of Anaat 1889
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Bolts for Doors, Gates, and other Objects.
I, HORACE BEAUMONT of Underriver, Seal near Sevenoaks, in the County of
Kent, Blacksmith, 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 :-
Bolts constructed according to my invention are made with a secret or not
observable locking appliance, mainly for the purpose of preventing the unauthorized
opening by children and other persons and specially as a safeguard against burglars
as they cannot be forced with a jemmy or other sharp tool.
The bolt is made tubular or with a recess from the back or door end to within

page_text: some distance from the other end. Within the said tubular part or recess is
provided a locking bar having a peg or projection, which when the bar is turned can
act against a catch or catches on an escutcheon or plate upon which the staple or
housing or housings of the bolt on the door are fixed. A stop is provided for
limiting the extent to which the bar is turned.
Figure 1 of the accompanying drawings is a plan, Figure 2 a sectional side
elevation, and Figure 3 a cross section of one such form of bolt. Figure 4 is a
perspective view of the locking bar of same and Figure 5 a cross section shewing the
stop of the locking bar.
The bolt is made in the form of a tube A. Within the tube is a locking bar B
having a disc B¹ with a slot B2, the other end of the bar has a head B³ which is flush
with the outside of the bolt A. The forward end of the hollow bolt is closed by a
plug A¹ having a disc part also flush with the outside of the bolt, the two ends B³
and A' of which thus appear alike and as if the bolt were ornamented with a very
narrow line all round done by a turning tool. The catch D is under the housing (1
of the escutcheon (2 being the other housing) so as to be out of sight and projects
through a slot A2 in the bolt A.
When the slot B2 of the locking bar is turned fair with the catch D the bolt can
be pushed forward or back, but in any other position it locks the bolt when in the
forward or closed position.
Similar provision may also be made for locking the bolt in the open or withdrawn
position. The projection on the locking bar B may be a plain peg instead of the
disc with slot as here shewn.
The locking bar B has at its back end a peg or pin B4 (or a square or rectangular
part) which is limited in its turning movement by a cross slot A³ in the end plug A*
of the tubular bolt. But any other suitable stop may be provided.
The locking bolt instead of being turned by taking hold of the head B³ of same
may be turned by other suitable means such as by a key inserted through a hinged
or other lid provided at the back end of the bolt but so as to be invisible or nearly
so from without.
In the sectional elevation Figure 6, sectional plan Figure 7, and end view Fig. 8,
is shewn a cam B¹ on the locking bar B, the latter being continued to the forward
end of the bolt where it has its bearing in the end plug A¹. The catches D and D¹
are for holding the locking bar B when the bolt A is in the back and forward
positions respectively. The cam B is of such a heavy size and form as to return the
locking bolt into the locking position when let go.
Figure 9 is a plan section, Figure 10 a sectional elevation, and Figure 11 a cross
section of an arrangement for selfactingly returning the locking bar into the locked
position, and also for locking the bolt in various positions. For these purposes the
locking bar B which is formed with a slotted head B' as in Figure 2 (or it might be
with a peg or a cam like in Figure 8) is provided with a helical spring E one end
of which is fixed to the bar B and the other end to the bearing C³ on the plate C, the
spring will return the bar B into the locking position when the bar is let go. The
catches D are slanting for allowing the head B₁ to rise on them when the bolt is
pushed forward, and the bar B is turned at the same time.
Although for convenience of manufacture the bolt is shewn tubular throughout it
need only be tubular for part of its length. And instead of being tubular it might
have a recess in its lower part for containing the locking bolt.
Bolts so constructed are applicable to doors, gates, window sashes, drawers, lids,
and the like.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A bolt which has a tubular or recessed part containing a secret or not observable
rotatable locking appliance in combination with a catch or catches on the plate
AL LUL
1

page_text: 2. A bolt which has a tubular or recessed part containing a secret or not observable
rotatable locking bolt in combination with a catch or catches on the plate containing
the bolt housings and with a spring or weighted part for keeping the locking bolt
normally locked substantially as set forth.
3. The construction of locking bolt shewn on the drawing.
JENSEN & SON,
May 1890.
77, Chancery Lane, London, W.C., Patent Agents.
Dated this 12th day of May 1890.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.