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Патент USA US2134861

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Nov. l, 1938.
A. M. DE vouRsNl-:Y`
Filed May _7, 195€
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CZM’M, ß ¿mma
Patented Nov. 1, 1938
Andrew M. De Voursney, Milwaukee, Wis.
Application May 7, 1936, Serial No. '78,308v
14 Claims. (Cl. 109-1)
This invention relates to an improvement in
safes and liners therefor.
It is the object of the‘invention to improve a
safe of the "Corliss” type by means discouraging
~5 unauthorized entry, ñrst by rendering such entry
Figure 2 is a view taken in section in the plane
indiCated al? 2-2 in Figure l.
Figure 3 is a fragmentary detail VieW 0n an
enlarged scale showing the various layers which
must be penetrated by the burglar t0 gain access 5
more diñicult, and secondly by depriving the bur-
to my improved safe.
glar of the fruit of his labor.
'I‘he country contains many thousand safes of
the Corliss type which are regarded by many per-
Like parts are identiûed by the same reference
characters throughOut the several Views.
In the drawing I have shown at 4 the door„and
10 sonsv as absolete for the reason that improvements
at 5 the Wall of a conventional safe; - In accord- E10
in the technique of thermal cutting has made it
possible for safe burglars to penetrate the Walls
with a torch and remove the contents. The doors
of this type of safe are still regarded as `virtually
15 impregnable ‘either by blowing, drilling, or ther-
ance with this invention I have assembled Within
the Safe the parts 0f a pre-fabrieated interior
jacket 0r liner generically designated by refer
enee Character 6, Which prOlJeCts all pOrtiOns 0f
the Wall 5 and is previded With an Opening at l `15
mal cutting.
registering with the opening which is closed by
'I'he practice of the safe burglar is as follows; the door 4.
With the extremely hot llame of a torch such as
In practice the liner is made up in at least
is commercially used either for cutting or weld- ñVe SeCl10r~like Darts 3, 9, i0, ll and l2, Pi'OVided
20' ing, the thief removes the metal Wall of the _safe With registering lugs I5 bolted together by the
untu he penetrates the interior. During this belts |6- The use of ñve sectors is required in
operation the wail 0f the safe has become higmy order to permit each sector to be introduced into
heated, and the lack of sufficient oxygen in the the door opening 0f existing Safes.
interior is frequently all that keeps the contents Each 0f I@he SeCtOrs 3, 9, l0, ÍÍ and l2 is prefer
25 from being burned. As soon as the flame pene- ably ÈWO ply. The inner ply il is made 0f tungtrates the wel] the thief immediately introduces Sten steel, which burns at an extremely high tem
a quantity of Water to submerge the contents and pei‘ature and requil‘es a special tip 0n the tOrCh
thereby prevent them from burning during his used for Cutting it. Whereas the Safe Wall 5 has
subsequent cutting operations to enlarge the helel .heretofore been made of manganese steel (to resist
The present invention seeks to improve both drilling) and will now at about 2200° F., the inner
existing and future safes of this type by provid- ply 0f the liner, if made 0f tungsten steel, will
ing a liner which is made sectionally for installaI10i flOW until the temperature reaches 0r eXCeeds
tion in existing equipment and which.` is not 5300° F.
merely made of metal highly resistant to therThe Outer ply lll, While nel? essential t0 the
35 mal cutting so that intense heat is required for inVenÈiOn, is preferred because il; may be made
its penetration, but in which additionally I pro0f a @Opper base burn-resisting metal harinar a
Vide an excess 0f oxygen made available when..
heat Conductivity S0 great aS t0 distribute the
ever the temperature becomes excessive to assure
heat ihl‘OughOut- the liner and the interior 0f the
the destruction of the combustible contents of
Safe befofeiìhe point 0f application 0f the flame
40 the Sam Even though the contents are not
Wholly destroyed, they will be rendered non-'ne-
can be used for the ply '8 but’ as above Indicated’
the ordinarilyaccepted sense they can still be
âìîîîîfítìaêedälìggâ are usual where heat cnn“
. no loss either
Thus there 1s
to the bank or the'
Insurer of the bank’ but the burglar 1S precluded
from profiting and therefore his incentive is
50 deslìrOyed. ì
the fOllOWing diSClOSuI'eIn the drawing
The liner may be left entirely loose within the V45
safe wall if desired
' but I preferto fill- the space
between the hner and the safe wall with a layer
i9 of concrete with which nails have been liber
ally interspersed, as indicated in Fig. 3 to resist
Other obieets will appear more Speclñcauy from
can_be raised to a temperature suñîlcient- f‘or `40
Cuttmg' Any metal of high heat ßor‘lduf’tlvlty
gotiable, and even if they are wholly destroyed in
*45 îlciiâììiiìîgaâêxdofraesdìîtnaîîùdëeütâOëxëpâgvegräîgï
The concrete is not only proof against 50
attack by a torch, but it also acts to some extent
as a thermal insulator to confine within the safe>
Figure 1 is a view in axial section of a safe
‘55 embodying my invention.
and the interior thereof all the heat developed
during attempts to penetrate the liner by cutting.
Obviously, the construction disclosed will great- 55
ly increase the mere mechanical difficulty of pene
tration. Using a low temperature tip, the bur
ing to burn at an exceedingly high temperature.
glar will speedily cut with his torch the outer wall
Such a material is the well known “Thermite"
5, but he will then be confronted with a concrete
which, in powdered form, as‘at 26, may be sus
pended in shallow pans 21 of any light sheet metal
or other material comprising supplemental liners
filler in which interspersed nails make drilling
difìîcult, so that his only means of »penetrating
this layer will involve chipping away the concrete
for the individual lining sectors. Such pans are
with a chisel or the like. This will be rendered
shown applied to the end wall surfaces and top
difficult not merely by the nails, but by the fact
time, the concrete layer in this location will offer
wall surfaces of sectors 8 and l2 in Figs. 1 and 2.
As above indicated, even badly charred secur 10
ities and currency can be'identified sufficiently for
replacement purposes or redemption by using
photographic processes and other technical im
provements-such as those including the use of ul
tra violet light. Even if the contents of the safe
were wholly destroyed beyond redemption or re
a severe handicap.
placement, however, the invention would still
10 that the'location of the concrete ñller on the in
side rather than the outside of the safe wall will
require the thief to operate through the relatively
small openingwhich he has been able to burn
in the exterior wall. Since criminals are notori
15 ously lazy, and are also obliged to work against
When the criminal has penetrated the concrete
the tungsten steel will offer a very substantial ob
20 stacle requiring the highest temperature for its
penetration, and the copper base burn-resisting
ply i8, if used, will tend to carry away the heat
with such rapidity as to prevent the operator from
raising the temperature to the point where he can
25 cut the inner ply I1. The outer ply I8, inciden
tally, may be held to the inner ply l1, by cap
screws 20 threaded into blind holes as shown in
Fig. 2.
_ From the foregoing it will be apparent that the
30 difficulty of access is greatly increased not merely
by the materials used and the number of different
plies or layers employed, but by the particular
order in which such plies or layers are incorpo
rated in my improved safe structure.
trating the‘safe and which will be self-oxygenat
serve its purpose in depriving the burglar of any
profit and thus tending to discourage future ef
I claim:
1. The combination with a metal safe wall,
of a liner comprising two plies disposed within
said wall, one of said plies being more thermally
resistant than the wall and the other of said
plies being highly heat conductive, the latter ply
being interposed between the former ply and
the wall, whereby to dissipate the heat of a torch
and to raise the temperature of a safe containing
such wall before such torch can gain access to
the thermally resistant ply.
2. In a safe, the combination with a metallic
higher than anything with which the burglar has
Wall, of a linersubstantially co-extensive with
the wall and comprising a metal more .thermally
resistant than the wall, and a cemetitious ñller
between the liner and the wall, said ñller being
substantially ímpregnable to attack by heat and
yieldable only to mechanical assault whereby to
heretofore been obliged to contend. Not only has
limit the area of access to the thermally resistant
Assuming that the would-be burglar succeeds
in penetrating the safe and its liner, it is appar
ent that the interior temperature will be much
40 he found it necessary to use a temperature of
5300° F. to cut the inner liner ply of tungsten
steel, but the outer liner ply of copper base metal
has distributed the heat throughout the liner and
the interior of the safe, its outward flow being
45 resisted by the concrete ñller (or the air space
between the liner and the safe wall if no filler is
used). In consequence of the extremely high
temperature which will exist throughout the in
terior of the safe, all combustible contents will
50 surely be destroyed or rendered non-negotiable if
sufficient oxygen is present.
To assure such destruction or mutilation, I pre
fer to suspend by means of the carrier 23 from
one of the bolts I6, a vessel 24 containing a clo
55 sure 25 adapted to hold in such vessel a supply of-
oxygen under pressure.
Obviously oxygenating
compounds may be used. In this particular em
bodiment of the invention, however, I use free
oxygen gas, and either the container 24 or its
60 closure 25, or both, are made of metal such as
lead or white metal which fuses at a low tem
perature not to exceed a few hundred degrees F.
Thus, any effort to cut thermally the liner 6 will
result in immediate release within the liner of a
quantity of `slxygen to assure the com
3. In a safe, the combination> with a wall, of a
liner substantially co-extensive with the wall
and comprising an inner ply more heat resistant
than the wall, an intermediate ply having a
higher heat conductivity than the inner ply of '"
the wall, and a non-metallic incombustible iiller
between said intermediate ply and the wall. '
4. The combination with a safe having aman
ganese steel wall and a door, of a liner substan
tially co-extensive with the wall and comprising
an inner ply of tungsten steel, an intermediate
copper base heat conducting ply, and a concrete
ñller between the intermediate ply and the wall.
5. 'I'he combination with a safe having a wall
provided with a door opening and a door, of a
liner comprising peripheral sections and end sec
tions applicable about the interior of the wall
and provided with means for connecting the safe
sections together to comprise a complete lining
substantially ocr-extensive with said wall, each
such section being receivable throughthe door
6. The combination with a safe having a wall
‘provided with a door opening and a door, of a
liner comprising peripheral sections and end
bustion of negotiable instruments and currency ' sections applicable about the interior of the wall
contained in the safe. It is to be noted that this
will occur before any opening can be made
through which water could be introduced and
70 consequently the burglar will find, upon entry,
that the securities within the safe are all non
I also employ, as a means of assuring the de
struction of thel contents of the safe, a material
which will be ignited by the torch used in pene
and provided with means for connecting the safe
sections together to comprise a complete lining
substantially co-extensive with said wall, each
such section being receivable through the door
opening and including a plurality of plies, one
of which is more highly heat resistant than the
wall, and the other of which is more highly heat
conductive than the wall.
7. The combination with a safe, of a container 15
Within the safe providing a supply of oxygen,
and thermally responsive means operable in the
presence of excessive heat to- release the oxygen
from the container.
8. The combination with a safe, of a vessel
Within the safe containing oxygen under pressure
and including thermally responsive means for re
leasing said oxygen When the temperature within
the safe becomes excessive.
9. The combination with a safe, of a vessel
having a low temperature fusible portion, said
vessel containing oxygen and being disposed
within the safe.
10. The combination with a safe having aI Wall,
15 of a liner substantially co-extensive With said
Wall and comprising metal more resistant to
torch burning than said Wall, and an oxygen
containing Vessel within said liner having ther
mally responsive means for releasing its con
20 tents at temperatures less than those which Will
be produced Within the liner by any attempt to
penetrate the liner thermally.
11. 'I‘he combination with a safe having a Wall
and a liner for said Wall, of a receptacle having
25 at least a fusible portion disposed within said
liner, said portion being adapted to release the
contents of the receptacle at temperatures below
those which will be occasioned within the liner
in the thermal penetration of the safe.
12. The combination with a safe, of thermally
responsive means for supplying oxygen to- the
interior thereof.
13. The combination with a safe, of means
therewithin _for destroying the contents of the
safe upon thermal attack, said means comprising 10
a gaseous medium adapted in the presence of
heat to destroy the contents ofthe safe, a vessel
containing said medium, and thermally respon
sive means for releasing said medium in the
presence of excessive heat.
14. The combination with a safe, of means
therewithin for destroying the contents of the
safe upon thermal attack, said means compris
ing an internal liner having high thermal re
sistance, whereby it can be penetrated only by 20
excessive heat, and thermal responsive means
operative in the presence of excessive heat for
delivering an oxygenating medium to the interior
of the liner.
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