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Publication numberUS2299793 A
Publication typeGrant
Publication dateOct 27, 1942
Filing dateJun 25, 1940
Priority dateJun 25, 1940
Publication numberUS 2299793 A, US 2299793A, US-A-2299793, US2299793 A, US2299793A
InventorsCleve Cannaday James, Harwood Ledbetter James
Original AssigneeCleve Cannaday James, Harwood Ledbetter James
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Life saving system
US 2299793 A
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Description  (OCR text may contain errors)

0 1942- J. c. CANNADAY EI'AL ,299,793

LIFE SAVING SYSTEM v Filed June 25, 1940 2 Sheets-Sheet 1 Q &

By 2mm A itorr zey R m V Inventor Oct: 27, 1942- J. c. CANNADAY ETAL 2,299,793

.LIFE SAVING SYSTEM 2 Sheets-Sheet 2 Filed June 25, 1940 Inventor May Vayz'l 72 a Jz'nzmz'e LedbeZler- I Wm A itorney 7 Patented Oct. 27, 1942' James Cleve Cannaday, Virgil Tea'guaand James i Harwood Ledbetter, Providence, Ky.

Application June 25, 1 940, Serial No. 342,403

2 Claims. (Cl. 128-140) 1 Our invention relates to improvements in life saving systems for confined, inaccessible spaces, either above or below ground, and particularly to an arrangement of this character especially adaptedfor use in mines wherein workmen are likely to be trapped by explosions, and other accidents, and subjected to danger through sufio cation, exposure, and asphyxiation, animportant object of our invention is to provide an arrangement of the character indicated involving a\plurality of stations located at selected points in the area of confined space or spaces in which the workmen or otherpersons are to be protected, and having connection with a readily accessible outside central station, whereby communication by telephone can be readily had to and from any one of the stations and the centralstation, and oxygenated air may be supplied to any one or all of the. stations, and electricpower furnished at any'of the stations for operation of selective safety appliances, whereby help may be readily called and the place of the accident may be made known to rescuers, and the workmen confined by: the accident kept in a'helpful condition facilitating rescue in good condition.

Other important objects and advantages of our invention will be apparent from a reading of the following description in connection with the drawings, wherein for purposes of illustrationa preferred embodiment of the invention is shown.

In the drawingsu i t Figure 1 is a general schematic longitudinal vertical sectional view taken through a minebelow the surface of the eartlnand showingtwo of a plurality of safety stations within the mine gallery, and showing the connections thereof with the central station onthe surface of the earth.

Figure 2 is'a front elevational view of a preferred form of a safety station with the door or cover of the cabinet removed to expose the contents of the cabinet.

Figure 3 is an enlarged fragmentary front elevational view of the dual electrical outlet arrangement.

Figure 4 is an enlarged horizontal sectional view taken through Figure 1 approximately on the line 4-4.

Figure 5 is an outer end elevational view of one of the current outlets.

Figure 6 is an enlarged transverse vertical sectional view taken through Figure 2 approximately on the line 6-6 showing the construction of a preferred type of breather.

sectional view taken through Figure 5 approximately on the line 1-4.

Figure 8 is a fragmentary elevational View ;of analternative form of breather.

Referring in detail to. the drawings, the numeral 5 generally designates the surface of the earth, in the example given for illustrative purposes, where on ismounted an air compressor 6 driven by a suitable motor 1, the compressor dis- 1 charging into a pressure mixing tank 8 with which is connected a high pressure oxygen tank II, the connection having 'a valve IE! controlling the proper-admixture of oxygen from the tank 9 to the compressed air in the tank 8; The tank 8 has a discharge pipe H having a valve l2 therein,

and this pipe II is connected to the breather mixture conveying pipe I3 which leads down through the earth, through a protective tube or pipe I4 which passes downwardly through a borehole or other entrance into the mine gallery l5 below the surface of the earth and in which the Figure 7 is a fragmentary longitudinal vertical workmen whose safety is to be safeguardemwork. The pipe I3 connects with a manifold pipe V. which is preferably buried or otherwise protectively sunk in the mine floor, IT, with the pipe 13 running along thewall of the cut. The upper part of the pipe l3 has a branch I8 which has a dual electric outlet 19 from which appropriate wires 25J and 2! lead to the mine ofiice or other suitable place where an alarm, may be sounded electrically through connection'with the said wires, in case of'anaccident in the mine, and

the operation of one of the safety stations by the trapped men. Additional breathing mixture pipes 22 may pass down alongside of the pipe i3 and alongside other manifolds l5 buried in the mine floor l1, asmay be required, the pipes 22 .having branches 22" leading into the stations 26. In any case the pairs of wires 20 and 2| respectively, pass downwardly through the tube Hi, these pairs of wires being wrapped in separate conduits 24 and 25, and lead into suitable manifolds 26, buried like the manifolds it below the mine floor I! for protection.

In accordance with the present arrangement. a suitable number and location of individual safety stations 26 mounted on the wall of the cut, will be provided, each to consist preferably of a suitable protective cabinet 21 containing at one side compartments 28 containing the wanted emergency appliances 29 ready for use by the trapped workers in alleviating their condition. A siren or other alarm 35) is mounted in the cabinet 21 as indicated in Figure 2 and provided with a connector cord 3| for plugging into one of the electrical outlets to be described, to facilitate warning workers. Each individual station comprises the vertical pipe 32 which connects with the corresponding manifold is in the mine floor I! and rises into the cabinet where it is provided adjacent the lower end of the cabinet with a tubular cross head 33 each arm of which is in the form of a tube having threaded on its outer end a dielectric block 34, as shown in Figure 7 of the drawings, having blade receiving openings '35 in its end to permit contact by the blades on the plug cord 3! with corresponding contacts 31 to which the corresponding pair of the wires 20, 2| are connected. Each of the arms is equipped as described and the arrangement enables operation of the siren or other electrical alarm device 30 with one or both arms arranged for telephonic communication by plugging in a hand phone into the proper one of the receptacles 34.

The tube 32 extends above the electrical outlet arrangement 33 and has on its upper end a cruciform fitting 33 whose arm 39 has therein a valve 40 and a number of safety mask tube outlets M to which the tubes of the safety masks may be readily connected. The remaining arm 42 of the fitting 38 is also provided with a valve 43 for connection of a breathing device or the like, either this device or the several masks connected to the outlets 4| being fed by oxygenated air coming through the tube 32 from the manifold, the manifold being, in turn, supplied by the surface equipment. A vertical arm 44 on the said fitting has a valve 45 which controls discharge of oxygenated air through the breather 46 which may preferably be in a spherical segmental form illustrated in Figure 6 and hollow and provided with a sufiicient number of perforations 41 to discharge the oxygenated air for immediate breathing purposes or to improve the air in a confined space.

A compartment in one lower corner of the cabinet 21 has therein rescue equipment generally designated by the numeral 41.

Another form of breather is shown in Figure 8 and designated by the number 45a has an elongated generally cylindrical form 48 with which the upper end of the vertical arm 44 connects.

It will be obvious that the compressor 6, applying sufficient compression to the oxygenated air mixture, forces this life giving mixture down through the pipe I3 and into the corresponding manifold within the mine, so that when the appropriate one of the valve 43, 40 or 45 is opened, the miners or other Workers will be enabled to rest or work in safe atmospheric conditions. It is also obvious that the workmen designated to operate the individual safety devices will, upon discovery of an accident, immediately get into telephonic communication wtih the mine house or other center, and thereby enable the trapped miners or the like to converse with potential rescue crews on the surface of the earth, so that the rescue may be efficiently performed.

Although we have shown and described herein preferred embodiments of our invention, it is to be definitely understood that we do not desire to limit the application of our invention to the precise structural and functional details set forth herein, except as may be required by the scope of the subjoined claims.

Having described the invention, what is claimed as new is:

1. A safety system for the protection of workmen working in a subterranean passage, said system comprising a bore hole leading from the surface of the earth or other convenient remote place into said passage, a protective casing passing through said bore hole to said passage, a plurality of safety stations distributed along said passage, each station comprising a cabinet mounted on the wall of the passage, a buried manifold pipe extending along said passage and having outlets leading into the various safety stations, said protective casing enclosing a supply pipe having its lower end connected in communication with said manifold, combined telephone and electric supply wires passing through said outlets and through said protective manifold and through said supply pipe to the surface of the earth, each cabinet containing a telephone and electrically operated rescue facilitating means, connector means on said outlets within the cabinets enabling electrically connecting the telephones and the rescue facilitating means to said telephone and electrical supply wires, each cabinet further containing respirator means, connecting means for connecting said respirator means in communication with a portion of the manifold outlet within the cabinet, and a main station located on the surface of the earth or said other convenient remote place, a respiration facilitating gas supply connected in communication with the upper end of said supply pipe, said main station further comprising telephone means and a source of electrical energy electrically connected to said combined telephone and electric supply wires.

2. A safety system in accordance with claim 1 wherein the said outlets of the manifold have resuscitating gas dispensing means within the cabinets for dispensing the gas into the atmosphere within the passage, said outlets further having individual adapters for the connection of gas masks for individual workers.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4165738 *Nov 22, 1977Aug 28, 1979Dyer Don LLife support system for drilling rigs
US4353292 *Sep 3, 1980Oct 12, 1982Banyaszati Aknamelyito VallalatAssembly for storing and facilitating application of breathing devices
US4380187 *May 6, 1981Apr 19, 1983Wicks Edward AMethod and system for providing life-sustaining air to persons entrapped within a burning building
US4467796 *Dec 2, 1981Aug 28, 1984Beagley Arthur EEmergency breathing air supply system and apparatus
US4862931 *Apr 22, 1988Sep 5, 1989Vella Louis JApparatus and method for refilling self-contained breathing apparatus
US5095899 *Nov 21, 1989Mar 17, 1992Green Thomas GSupplying air through water hose to an emergency worker
US5109836 *Apr 3, 1991May 5, 1992Burgess Paul DBreathing apparatus for providing a source of breathable air in a burning structure
US5507283 *Mar 1, 1994Apr 16, 1996Grivas; Dimitrios E.System for providing air to those trapped within a burning building
US5570685 *May 18, 1995Nov 5, 1996Rescue Air Systems, Inc.Breathing air replenishment control system
US7066172 *May 29, 2003Jun 27, 2006Dräger Safety AG & Co. KGaAWarning device for a respirator product
US7527056 *Aug 16, 2006May 5, 2009Rescure Air Systems, Inc.Breathable air safety system and method having an air storage sub-system
US7621269 *Aug 16, 2006Nov 24, 2009Rescue Air Systems, Inc.Breathable air safety system and method having at least one fill site
US7673629 *Aug 16, 2006Mar 9, 2010Rescue Air Systems, IncSafety system and method of a tunnel structure
US7677247 *Aug 16, 2006Mar 16, 2010Rescue Air Systems, IncSafety system and method of an underground mine
US7694678 *Aug 16, 2006Apr 13, 2010Rescue Air Systems, Inc.Breathable air safety system and method having a fill station
US7770610 *Feb 6, 2007Aug 10, 2010Mechanical Contractors Association, Inc.System and method for in-structure delivery of air for filling of breathing apparatus
US7975729Aug 5, 2010Jul 12, 2011Lisle Richard WSystem and method for in-structure delivery of air for filling of breathing apparatus
US8375948 *Oct 14, 2009Feb 19, 2013Rescue Air Systems, Inc.Method and system of air extraction process from an emergency support system
US8381726 *Jan 21, 2010Feb 26, 2013Rescue Air Systems, Inc.Safety system and method of an underground mine
US8413653 *Jan 21, 2010Apr 9, 2013Rescue Air Systems, Inc.Safety system and method of a tunnel structure
US8443800 *Nov 11, 2009May 21, 2013Rescue Air Systems, Inc.Method and system of safeguarding a filling process of a breathable air apparatus
US8460074Feb 24, 2009Jun 11, 2013Harold AkersApparatus and method for providing breathable air to safe havens within a mine
US8701718 *Dec 3, 2012Apr 22, 2014Rescue Air Systems, Inc.Emergency air system and method of a marine vessel
US8733355 *Mar 25, 2009May 27, 2014Rescue Air Systems, Inc.Breathable air safety system and method
US20090178675 *Mar 25, 2009Jul 16, 2009Turiello Anthony JBreathable air safety system and method
US20100084043 *Oct 14, 2009Apr 8, 2010Turiello Anthony JMethod and system of air extraction process from an emergency support system
US20100089489 *Nov 11, 2009Apr 15, 2010Turiello Anthony JMethod and system of safeguarding a filling process of a breathable air apparatus
US20100154922 *Jan 21, 2010Jun 24, 2010Turiello Anthony JSafety system and method of a tunnel structure
US20110030838 *Jan 21, 2010Feb 10, 2011Turiello Anthony JSafety system and method of an underground mine
WO1995023629A1 *Mar 1, 1995Sep 8, 1995Dimitrois E GrivasSystem for providing air to those trapped within a burning building
WO2008021538A2 *Aug 16, 2007Feb 21, 2008Rescue Air Systems IncBreathable air safety system and method having an air storage sub-system
WO2009023008A1 *Aug 14, 2007Feb 19, 2009Battelle Memorial InstituteMiner acoustic communication and location system
WO2014014718A1 *Jul 10, 2013Jan 23, 2014Elwha LlcLiquefied breathing gas systems for underground mines
U.S. Classification128/202.13, 128/205.25, 137/236.1, 340/320
International ClassificationE21F11/00
Cooperative ClassificationE21F11/00
European ClassificationE21F11/00