Preventing their being Opened by Burglars.
Year: 1888

page_text: Date of Application, 30th Apr., 1888
Complete Specification Left, 27th Feb.. 1889
Complete Specification Accepted, 6th Apr., 1889
Preventing their being Opened by Burglars.
We, SAMUEL CHATWOOD, of 76 Newgate Street in the City of London, Bankers
Engineer, SAMUEL RAWSTHRONE CHATWOOD, of 76 Newgate Street in the City of
London, Manager, and ARTHUR BRUNEL CHATWOOD, of Bolton in the County of
Lancaster, Manager, do hereby declare the nature of this invention to be as
follows:-
:-
The object of this invention is to render more difficult the opening of safes by
the use of the oxyhydrogen blow-pipe using portable oxygen under pressure and
ordinary illuminating gas.
In order to make the use of the blow pipe more difficult we render it difficult to
obtain sufficient gas for the purpose by placing the gas meter within a metal safe
and provide the meter with a service pipe of case hardened hydraulic piping which
we bury and bring in at bottom of meter safe-inside the meter safe we provide a
small by-pass pipe of very small diameter to supply any small light which may be
required but insufficient to be of use to the burglar. The safe or strong room we build
up of steel bars thicker in one part than another such as rails and bulb sections or
of or sections or channel sections we attach these at the corners in any convenient
manner and we bed the same in refractory concrete.
In portable safes we enclose the rails bulb or other section in two shells preferably
of steel plates or castings and for strong rooms we also sometimes place the rails bulb
or other sections within two steel shells. In all cases we fill the open spaces between
the sections and between the shells with a highly refractory cement having great
tenacity and hardness.
Sometimes when we place rail bulb or other section between the inner and outer
shells of a strong room we slot the ends and cause the same to key with the web
of a Tee bar so that when the cavities are filled with cement it will be impossible to
loosen one bar without removing the whole.

page_text: The doors of safes and strong rooms we make with bars of deep section such as
double ended steel rails or other convenient section these we securely fasten together
and place within a hollow door of which we make it part and the cavities between
the various bars and the sides and front of the hollow door we fill with a refractory
cement having great tenacity and hardness. The lock work we place on the inside
of the hollow door as far away from the outer face of the door as structural con-
siderations permit of.
Sometinies instead of using steel of the sections named we use strong cellular cast-
ings of iron or steel and fiil the cavities with a refractory cement of great tenacity
and hardness.

page_text: Preventing their being Opened by Burglars.
We, SAMUEL CHATWOOD, of 76 Newgate Street, in the City of London, Bankers
Engineer, SAMUEL RAWSTHRONE CHATWOOD, of 76 Newgate Street, in the City of
London, Manager, and ARTHUR BRUNEL CHATWOOD of Bolton in the County of
Lancaster, Manager, 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 to render more difficult the opening of safes by the
use of the oxyhydrogen blow-pipe using portable oxygen under pressure and ordinary
illuminating gas.
In order to make the use of the blow pipe more difficult we render it difficult
to obtain sufficient gas for the purpose by placing the gas meter within a
metal safe and provide the meter with a service pipe of case hardened hydraulic
piping which we bury and bring in at bottom of meter safe-inside the meter safe we
provide a small by-pass pipe of very sinall diameter to supply any small light which
may be required but insufficient to be of use to the burglar. The safe or strong
room we build up of steel bars thicker in one part than another such as rails and bulb
sections or of or ✓ sections or channel sections we attach these at the corners in any
convenient manner and we bed the same in refractory concrete.
In portable safes we enclose the rails bulb or other section in two shells preferably
of steel plates or castings and for strong rooms we also sometimes place the rails bulb
or other sections within two steel shells. In all cases we fill the open spaces between
the sections and between the shells with a highly refractory cement having great
tenacity and hardness.
Sometimes when we place rail bulb or other section between the inner and outer shells
of a strong room we slot the ends and cause the same to key with the web of a Tee
bar so that when the cavities are filled with cement it will be impossible to loosen one
bar without removing the whole.
The doors of safes and strong rooms we make with bars of deep section such as
double ended steel rails or other convenient section these we securely fasten together
and place within a hollow door of which we make it part and the cavities between the
various bars and the sides and front of the hollow door we fill with a refractory
cement having great tenacity and hardness. The lock work we place on the inside of
the hollow door as far away from the outer face of the door as structural considerations
permit of.
Sometimes instead of using steel of the sections named we use strong cellular
castings of iron or steel and fill the cavities with a refractory cement of great tenacity
and hardness.
In order that our said invention may be fully understood and readily carried into
effect we will proceed to describe the drawings hereunto annexed.

page_text: DESCRIPTION OF DRAWINGS.
Figures 1, 2 and 3 show a back elevation, a sectional side view, and a sectional plan
of a safe or strong room constructed in the following manner.
The strong room consists of two steel-shells one within the other, with a suitable
space between them. These shells are built up of steel plates attached together by |
irons and at the corners by ☐ and angle irons to which the plates are screwed or
rivetted.
The chambers or cavities are filled with rails and the interstices filled with concrete.
The rails in adjacent sides may be attached together in one of the ways hereafter
described.
Figure 4 shows sectional view of the corner of a similar structure with only a
single plate in the roof.
This system is available when it is impossible for a burglar to remove
any considerable portion of the overlaying concrete, as for example when the
strong room forms the base of a large column, supporting part of the building in which
the strong room is placed.
Figure 5 shows a sectional view of one of the corners of a similar structure in which
another method of attaching the plates together to form the double casing containing
the rails is adopted.
Figures 6 and 7 show respectively a sectional elevation and plan of a strong
room constructed in the following manner.
The room is constructed of steel plates having steel rails screwed or rivetted to them.
Each side is composed of several such plates attached together by being screwed or
rivetted to steel rails at the joints. The corners are formed by steel or iron angles.
After the room has been constructed it is covered outside with concrete. This may
be conveniently done. by building a brick wall round the strong room, leaving a
suitable cavity between the steel strong room, and the brick wall, and pouring cement
concrete between the two.
Figures 8, 9 and 10 show sections illustrating the mode of attaching together the
adjacent sides of the room.
Figures 11, 12, and 13 illustrate methods of attaching the rails together at the
corners applicable to either of the systems of construction represented on sheets I
and II.
The ends of the rails have a slot formed in them and a † T or angle bar is
placed in these slots, so that it is impossible to remove a single rail, without first
removing the adjacent side of the strong room.
Figure 14 is another view of the method illustrated by Figure 11.
Figures 15 and 16 illustrate a method applicable to either of the systems described
on sheets I and II or to strong rooms constructed without plates.
Long bolts are passed through the rails securing them together and at the corners
these bolts pass through the ends of the rails which form the adjacent sides and thus
secure them together.
In Figures 17 and 18 the corners of the strong room are formed of cast bars having
a number of sockets alternately at right angles to one another. These sockets receive
the ends of the rails forming adjacent-sides and the rails may be screwed or rivetted
to the corner bar.
Figures 19 and 20 show the rails attached together at the corners by being rivetted
or screwed to a strong steel or iron angle.
Figures 21 and 22 show a construction similar to that illustrated on sheet Il but
with a rail placed between the rails attached to the plates so as to protect the screws
or rivets. At the corners of the structure the result is obtained by applying cast or
rolled bars of suitable section between the adjacent rails.
Figures 23 and 24 show the rails attached together by fish plates.
Figures 25 and 26 show bars of special form attached to the plates for preventing
any of the rails from being removed in case all the rivets or screws attaching it to
the plates have been drilled or forced out,

page_text: Figure 27 shews a gas meter A enclosed in a safe B. The gas supply pipe C is of
case hardened hydraulic tube or is enclosed in a pipe of undrillable nature."
Within the safe is a small bye-pass pipe D.
The pipe leads from the outside of the premises to the moter (or stop tap) so that
when the stop tap is turned off, and the safe locked, no gas, (except the very small
quantity supplied by the bye pass D) can be obtained for use with a blow pipe.
Figures 28 and 19 are vertical and horizontal sections of a safe or strong room door,
composed of plates built up so as to form a chamber or box, and rails are placed in
this chamber, they may be rivetted to the outer or inner plate. The interstices are
filled in with cement concrete.
.
Figures 30 and 31 indicate a compound plate formed of a plate or a block of cast
metal having small chambers of cells on its inner face. These cells are filled with
cement concrete, and an additional plate is attached to the back.
We sometimes employ such compound plates in the construction of safes and strong
rooms to replace the rails or bars.
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 :-
1. The means substantially as described of constructing safes and strong rooms
and doors for the same of steel rails or like bars.
2. In safes and strong rooms, to which the preceding claim applies, connecting the
rails or bars at the corners by slotting their ends and keying them by a bar of tee
or like section.
3. The means substantially as described of constructing safes and strong rooms and
doors for the same of steel rails or like bars combined with a metal shell or enclosed
between two shells.
4. Constructing safes and strong rooms and doors for the same of cellular castings
of iron or steel having the cavities filled with cement substantially as described.
5. Safes and strong rooms constructed substantially as described by the annexed
drawings.
6. The means substantially as described for protecting the gas meter whereby
the burglar is denied that ample supply of gas which he requires in order successfully
to attack a safe with the oxyhydrogen blow pipe.
Dated this 27th day of February 1889.

page_text: Reprinted as amended in accordance with a further decision of the Comptroller
General, dated the 28th day of February, 1900.
Date of Application, 30th Apr., 1888
Complete Specification Left, 27th Feb., 1889-Accepted, 6th Apr., 1889
Improvements in Safes and Strong Rooms and in Means for
Preventing their being Opened by Burglars,
We, SAMUEL CHATWOOD, of 76, Newgate Street, in the City of London, Bankers'
Engineer, SAMUEL RAWSTHRONE CHATWOOD, of 76, Newgate Street, in the City of
London, Manager, and ARTHUR BRUNEL CHATWOOD, of Bolton, in the County of
Lancaster, Manager, do hereby declare the nature of this invention to be as
follows:-
The object of this invention is to render more difficult the opening of safes by the
use of the oxyhydrogen blow-pipe using portable oxygen under pressure and ordinary
illuminating gas.
In order to make the use of the blow pipe more difficult we render it difficult to
obtain sufficient gas for the purpose by placing the gas meter within a metal safe and
provide the meter with a service pipe of case hardened hydraulic piping which we
bury and bring in at bottom of meter safe inside the meter safe we provide a small
by-pass pipe of very small diameter to supply any small light which may be required
but insufficient to be of use to the burglar. The safe or strong room we build up of
steel bars thicker in one part than another such as rails and bulb sections or of
I or sections or channel sections we attach these at the corners in any convenient
manner and we bed the same in refractory concrete.
In portable safes we enclose the rails bulb or other section in two shells preferably
of steel plates or castings and for strong roonis we also sometimes place the rails
bulb or other sectious within two steel shells. In all cases we fill the open spaces
between the sections and between the shells with a highly refractory cement having
great tenacity and hardness.
Sometimes when we place rail bulb or other section between the inner and outer
shells of a strong room we slot the ends and cause the same to key with the web of
a Tee bar so that when the cavities are filled with cement it will be impossible to,
loosen one bar without removing the whole.
The doors of safes and strong rooms we make with bars of deep suction such as.
double ended steel rails or other convenient section these we securely fasten together
and place within a hollow door of which we make it part and the cavities between the,
various bars and the sides and front of the hollow door we fill with a refractory cement
having great tenacity and hardness. The lock work we place on the inside of the
hollow door as far away from the outer face of the door as structural considerations
permit of.

page_text: Sometimes instead of using steel of the sections named we use strong cellular
castings of iron or steel and fill the cavities with a refractory cement of great tenacity
and hardness.
ית
001 1
c
1000
Improvements in Safes and Strong Rooms and in Means for
Preventing their being Opened by Burglars.
We, SAMUEL CHATWOOD, of 76, Newgate Street, in the City of London, Bankers'
Engineer, SAMUEL RAWSTHRONE CHATWOOD, of 76, Newgate Street, in the City of
London, Manager, and ARTHUR BRUNEL CHATWOOD, of Bolton, in the County of
Lancaster, Manager, 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 to render more difficult the opening of safes by the
use of the oxyhydrogen blow-pipe using portable oxygen under pressure and ordinary
illuminating gas.
In order to make the use of the blow pipe more difficult-we-render it difficult to
obtain sufficient gas for the purpose by placing the gas-meter within a metal-safe
and provide the meter with a service pipe of ense-hardened-hydraulic piping which
we bury and bring in at bottom of meter safe inside-the-meter-cafe-we-provide a
small-bypass-pipe of very small-diameter to supply any small light which may be
required but insufficient to be of use to the burglar. The safe or strong room we
build up of steel bars thicker in one part than another such as rails and bulb sections
or of I or sections or channel sections we attach these at the corners in any con-
venient manner and we bed the same in refractory concrete.
In portable safes we enclose the rails bulb or other section in two shells preferably
of steel plates or castings and for strong rooms we also sometimes place the rails bulb
or other sections within two steel shells. In all cases we fill the open spaces between
the sections and between the shells with a highly refractory cement having great
tenacity and hardness.
Sometimes when we-place-rail bulb-or-other-section between the inner and outer
shells of a strong room we slot the ends and cause the same to key with-the-web of
a-Tee-bar-so-that-when-the-envities are filled with cement it will be impossible-to
loosen one-bar-without removing the whole.
The doors. of safes and strong rooms we make with bars of deep section such as
double ended steel rails or other convenient section these we securely fasten together
and place within a hollow door of which we make it part and the cavities between
the various bars and the sides and front of the hollow door we fill with a refractory.
cement having great tenacity and hardness. The lock work we place on the inside
of the hollow door as far away from the outer face of the door as structural considera-
tions permit of.
Sometimes instead of using steel of the sections named-we use strong cellular
eastings of iron or steel and fill the envities with n-refractory cement of great
tenacity and hardness:
In order that our said invention may be fully understood and readily carried into
effect we will proceed to describe the drawings hereunto annexed.

page_text: DESCRIPTION OF DRAWINGS.
Figures 1, 2 and 3 show a back elevation, a sectional side view, and a sectional plan
of a safe or strong room constructed in the following manner.
The strong room consists of two steel-shells one within the other, with a suitable
space between them. These shells are built up of steel plates attached together by
Iirous and at the corners by ☐ and angle irons to which the plates are screwed or
rivetted.
The chambers or cavities are filled with rails and the interstices. filled with
concrete.
The rails in adjacent sides may be attached together in one of the ways hereafter
described.
Figure 4 shows sectional view of the corner of a similar structure with only a single
plate in the roof.
This system is available when it is impossible for a burglar to remove any con-
siderable portion of the overlaying concrete, as for example when the strong room
forms the base of a large column, supporting part of the building in which the strong
room is placed.
Figure 5 shows a sectional view of one of the corners of a similar structure in which
another method of attaching the plates together to form the double casing containing
the rails is adopted.
Figures 6 and 7 show respectively a sectional elevation and plan-of-a-strong room
constructed in the following munner.
The room is constructed of steel plates having steel rails screwed--or rivetted
to them:
Each side is composed of several such plates attached-together-by-being screwed
or rivetted-to-steel rails at the joints. The corners are formed-by-steel or iron
angles. After the room has been constructed it is covered outside-with-concrete.
This may be conveniently done by building a brick wall round the strong-room,
leaving a suitable-cavity between the steel strong room, and the brick wall,-and
pouring cement-concrete-between the two.
Figures and 10 show sections illustrating the mode of attaching together the
adjacent-sides of the room.
Figures-11, 12 and 13 illustrate methods of attaching the rails-together-nt the
corners applicable to either of the systems of construction-represented--on-sheets-I
and-H
The ends of the rails have a slot formed in them-and-a-T-or-angle bar is placed
in these slots, so that it is impossible to remove a single rail, without first removing
the adjacent side of the strong room.
Figure 14 is another view of the method-illustrated by Figure 1:
Figures 15 and 16 illustrate a method applicable to either of the systems-de-
seribed-on-Sheets I and II or to strong rooms constructed without plates.
Long bolts-are- passed through the rails securing them together; and at the corners
these Bolto pass through the ends of the rails which form the-adjacent-sides-and
thus seenre them-together.
In Figures 17-and-IS- the corners of the strong room are formed of east bars
having a number of sockets alternately at right angles to one-another. These
sockets receive the ends of the rails forming adjacent sides and the rails may be
screwed-or-rivetted to the corner bar:
Figures 10-and-20 show the rails attached together-at-the corners, by being
rivetted or serewed to a strong steel-or-iron-angle.
screws or rivets.
Figures and 227 show a construction similar to that illustrated on Sheet H
bat with a rail placed between the rails attached to the plates so as to protect the
At the corners of the structure the result is obtained by applying
cast or rolled bars of suitable section between the adjacent rails.
Figures 23 and 24-show-the-rails attached-together-by fish plates,

page_text: Figures-25-and 26 show-bare of special form attached to the plates for preventing
any of the rails from being removed in case all the rivets or screws-attaching it to
the plates have been-drilled or forced-out.
Figures 78 and 29 are vertical and horizontal sections of a safe or strong room
door, composed of plates built up so as to form a chamber or box, and rails are
placed in this chamber, they may be rivetted to the outer or inner plate.
interstices are filled in with cement concrete.
The
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
1. The menus substantially as described of constructing enfes and strong rooms
und doors for the same of steel rails or like-bars.
2. In safes and strong rooms, to which the preceding claim applies, connecting
the rails or bars at the corners by slotting their ends and-keying them by a bar of
Tee or like section.
3. 1. The means substantially as described of constructing safes and strong rooms
and doors for the same of steel rails or like bars combined with a metal shell or
enclosed between two shells.
4. 2. Safes and strong rooms constructed substantially as described by the annexed
drawings.
Dated thin 97th day of Waki 1000
CARPMAEL & Co.,
Agents.