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Publication numberUS952761 A
Publication typeGrant
Publication dateMar 22, 1910
Filing dateNov 3, 1909
Priority dateNov 3, 1909
Publication numberUS 952761 A, US 952761A, US-A-952761, US952761 A, US952761A
InventorsVirgil A Smith
Original AssigneeVirgil A Smith
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 952761 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)





wammw w 45 in Fig. 2.



Specification of Letters Patent.

Patented Mar. 22, 1910.

Application filed November 3, 1909. Serial No. 526,086.

of Texas, have invented a new and useful Safe, of which the following is a specification.

V This invention relates 'to safes and has for its vobject the provision of simple and eificient-means whereby the safe will be protect ed from the efiorts of burglars to abstract the contents, and which may be readily applied to any type of safe.

The invention is illustrated in the accompanyingdrawings and consists in certain novel features which will be hereinafter first fully described and then specifically claimed.

In the accompanying drawings, Figure 1 is a perspective view of a safe showing my improved device in dposition therein. Fig. 2 inal section of my 1m-- is a detail longitu proved device on a somewhat larger scale.

The safe 1 maybe of any desired type and is provided with the usual doors 2 and 3.

In carrying out my invention, I emplo a metal tube or cylinder i which is provi ed with perforations or similar openings 5 and is so disposed within the safe as to permit the contents of the tube to escape through i the said openings into the money drawer 6 of the safe when the safe has been blown or the door otherwise opened by unauthorized persons. This tube or cylinder 4 is threaded at its inner end and closed at its outer end,

the threaded inner end being screwed into the back of the safe,as indicated at 7 in Fig. 2. Disposed within the metal tube 4: is a glass tube 8 which may be cemented or otherwise secured to the back of the safe or to the rear closed end of the outer tube and its front end is turned upward, as indicated at 9, to present the hook which is adapted to be engaged by a latch 10 pivotally mounted on the inner side of the inner door 2, as shown When the tubes are placed within the safe they will be filled with chemicals which,

when mixed, will form and liberate a noxious gas which will asphyxiate the burglars and will discolor. the money within. the

I son that it does not form a part of m money drawer so that should the burglars not be overcome by the liberated gas and abstract the money, the attempt to circulate the money would cause the instant detection of the burglars and result in their arrest. The inner glass tube 8 is intended to be broken by the opening "of the inner door and this result may be assured by' any convenient or preferred construction, the drawings showing the tube as being made ezgceedingly thin within the outer tube so that it will be very fragile and a slight pull upon the front upturned end of the same will exert a breaking strain on the inner thin portion. When the inner tube is broken, the liquid chemicals therein will at once flow onto and mix with the dry chemicals within the outer tube and the gas thereby generated will escape through the openings 5 in the said outer tube, as before stated.

The inner tube will, of course, be strong I enough to prevent accidental breaka e but not so strong that it' will not be roken when the safe is blown or forcibl opened. The mixture of the chemicals wili a dense smoke which will not immediately dissipate so that the burglars will be forced :to leave the room in order to avoid being overcome by theenerated gas and smoke.

In actual practlce, the latch 10 will be extended through the door or otherwise connected with the combination mechanism so that when the safe -is opened in the proper manner by a person knowing the combination thelatch will be released from its pengagement withthe 11 turned end 9 of the inner tubeand the sa e may be opened without breaking the tube. I have not illustrated this connection, however, for. the rearesent invention and may be arrange a great variety of ways. j I

Having thus described my invention, what I claim 1s:

The combination with a. safe having a money drawer, of a tube secured in the back wall of the safeand extending therefrom directly over the money drawer, said tube having closed ends and being rovided with perforations in its bottom an containing a produce of and containing a liquid chemical adapted to generate gas by combining with the dry chemical Within the outer tube, and means 1 on the door of the safe for fracturing the 1' inner fragile tube.

In testimony that I claim the foregoing as my own, I have hereto afiixed my signa- 10 ture in the presence of two witnesses.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5406896 *May 30, 1991Apr 18, 1995Ab CatusafeSecurity box for installation in a safe
US6568336 *Jul 18, 1997May 27, 20033Si Security Systems, Inc.Device for dispensing a liquid onto valuables
WO1990006414A1 *Dec 5, 1989Jun 14, 1990Catusafe AbSecurity box for installation in a safe
Cooperative ClassificationE05G1/12