|Publication number||US1008370 A|
|Publication date||Nov 14, 1911|
|Filing date||Dec 1, 1909|
|Priority date||Dec 1, 1909|
|Publication number||US 1008370 A, US 1008370A, US-A-1008370, US1008370 A, US1008370A|
|Original Assignee||Louis Robillot|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (87), Classifications (5)|
|External Links: USPTO, USPTO Assignment, Espacenet|
AUTOMATIU FIRE ALARM.
APPLIGATION FILED 13110.1,1909- 1,008,370. Patented Nov. 14,1911. f l
ffm/ffm" Wmv/'W LOUIS BOILLOT, OFBESANCON, FRANCE.
Speoication of Letters Patent.
Patented Nov. 14, 1,911.
Application led December 1, 1909. Serial No. 530,809.
To all whom it may concern:
-zen of theRe ublic of France, No. 6 Square t. Amour,
in Automatic Fire-Alarms, of which the following is a specification.
Automatic fire alarms at present employed are usually contrivances dependent upon the expansion of metals or gases under the in- `fluence of heat, or upon the ready fusibility of certain fatty substances or metallic alloys.
These insulated contrivances, which should be installed in large numbers to aii'ord appreciable security, are connected to electric alarm contrivances, -by conductors which may be broken in case of lire, before the alarm devices have performed` their func-` tion. In addition these contrivances are frequently ineffective by reason of their tardy action.
The present ,invention has for its object the provision of an alarl'nwhich shall afford really eilicient protection to premises and buildings against fire, and relatesrspeciically to the construction of the cable ernployed in devices of this character. This alarm utilizes the destructive' action of fire and the expansive actions produced by heat to effect a contact between two insulated electric conductors, situated very near one another, whereof the insulating covering is destroyed almost instantaneously by -lames -the conductors being constructed and connected to an electric battery, and to electric alarm devices in a manner which will be described by reference to the accompanying drawing in whichz-- i y y Figure 1 is a diagrammatic representation of the installation, and r-Figs 2 and 3 are larger scale views of two examples of constructlon of a cable carrying bilar strands which constitute the chief element of this invention. Figs. 4 and 5 are transverse sectional views of complete cables of thert pes illustrated, respectively, in Figs. 2 an 3.
For the purpose of this invention an electric circuit comprises two conductors a, b, insulated from one another, and also insulated at one of their extremities a1, b1. At
i their. other extremities the two conductors i are connected, the'one at b2 to the positive Be it known that I, Louis Rornror, citi residing at. Besanon, France, have invented new and useful Improvements pole of an electric battery c, the other at az to the negative pole of the same battery through the medium of an indicator el, comprising the local circuit e, j of an electric bell system g. The indicator d and :he bell or bells g which are in series, are installed in places chosen so that they are under watch night and day. When any ame reaches the alarm circuit, contact between the two conductors a, b, is brought about by means of the arrangement described above, und the alarm is give l V Two return wires las', connected tothe two wires a, b, of the alarm circuit at their free ends a1, b1, are led to the place of observation, where they are joined to the two terminals of a junction piece j, 1:, which allows the effective condition of the circuit and the proper working capability of the alarm contrivance to be tested at any moment. The
indicator d has-as many indicating surfaces as there are alarm circuits in the establishment to be protected. A separate jtnction is employed for testing each of the 11n es.
consequence of its great flexibility, its strength, its small section and its lightness, the said electric cable alarm lendsitself to a multiplicity of combinations, and to' very varied applications to .installations fcr 4protection against fire. It may be applied in various other ways.
The new cable would advantageously be used as a double wire in rooms for all Intlar electric installations of low voltage, especially for telephone and bell. installations. The use of this cable, the price'o'f which is very small, would simplify installation and lessen the breakdowns and expenses of upkeep which are considerable items in connection with leads now in use. Thr twowire electric cable alarm can be equally7 well applied to electric apparatus for protection against burglary, since, as said above, the two threads whlch compose it make contact with one another, and can consequently cause the actuation of a bell, through the medium of an indicator, when the cable is cut by any instrument. One r-nn obtain complete security in respect cf lhis latter application, and also for protection against arson by adopting thc following form for the electric cable alarmlzv-As shown .in transverse section in Fig. 4, on a very much cnlarged scale, the new cablev is primarily composed of six wires of copper or other metal of a very small diameter, each being covered with a ver thin layer of silk thread or other insu ating material c', the wire being twisted together in pairs so as to form three bifilar strands. rI'hese three strands are located in three equidistant helical grooves m, n, o, formed 1n a wire p of Coppel` or other metal, and constituting the safety core of the cable. The cable thus formed is then covered with a thin layer of cotton thread or other soft material d', and finally with a tube e of metal of fusible allo The grooves` above referred to are of a depth at least as eat as, and preferably greater than, the iameter of these twisted strands, the purpose of this .construction being to hinder tampering with the strands, but should the strands be molested then owin to the fit thereof in the grooves, and the t 'n insulation around the strands it would be practically impossible to interfere with one strand without affectin the other and thus giving the alarm. or certain parts of installations, la flexible conductor could under the same conditions be vemployed, the metallic tubular protector being rep aced by a winding of tape.
The six conductors of the cable or of the flexible conductor alarm, distinguished by insulating coverings of different colors could be em loyed at need, to form one, two or three dou le wire circuits, of which each wire of the circuit will be composed of one or more elements by connecting in each bilar strand one element to one of the threads a of a circuit, and the other element to the second thread b of the circuit (Fig. According to the exampleabove, cable and flexible conductor alarms with two or four strands could also be constructed, by means of one or two strands formed of two insulated conductors twisted together, and located in one or two helical grooves in the metallic safety core.v Cables and ilexible conductors of the same type y could also be formed of eight or even more conductors by varying the number and size of the grooves in the core, and by insertin when needed several bitilar strands in eac of these grooves or by emplo ing as a safety core a metallic wire of su cient cross section to permit of any increase in the number of grooves if and when required.
The alarms described above have the great advantage of being unbreakable by tension, and being incapable of division by any In addition these cables or conductors give means without the alarm being given."
the warning signal very promptly under the action of a llame'.
. The metallic safety core, instead of being 'formed by a single grooved wire p (Fig. 2)
may be constructed, as shown in cross section in Fig. 3, of a plurality of spaced metallic wires 9, helically wound on a central metallic wire g, and between which are interposed the biiilar conductorsa/-b and h-i, forming the various electric circuits of the alarm. The auxiliary central and exterior metallic wires g 1', thus employed to form thevcarrier may be bare or insulated; they may be made of steel, iron, bronze, copper or of any other metal or alloy, but it is advantageous to employ, for this purpose, a metal or alloy of considerable hardness and tensile strength.
By simultaneousl windin around the central wire the bi lar stran s a-b, h-i, and the auxiliary exterior wires r arranged as described above, a cable is obtained of which the strands comprise the auxiliary metallic wires and the bilar conductor strands interposed. For exam le in the case of Fig. 3 which is that o an alarm cable of six conductors, there being three bifil'ar strands, the construction is that of a seven element cable composed of a central -auxiliary wire forrrling a core on which are helically wound three auxiliary wires and three betilar conducting strands,` the latter alternating with the former, that is to say, each of the bilar strands is interposed between two auxiliary wires. The cable is then covered with a layer of cotton thread or other soft material, d', and finally .with a flexible and fusible metallic tube e According to the latter type, cables and flexible conductors could be constructed with two, four, six, eight or even more conductors, the number of the auxiliary exterior wires bein varied, and if necessary, a plurality .of ilar strands being located in .each of the spaces formed between these wires, or an insulating central wire of a diameter greater than that of the bilar conducting strands and the auxiliary exterior wires can be emplo ed so as to admit of an increase at need 1n the number of biflar conducting strands and auxiliary wires within' the periphery of the cable.
lt goes without saying that the means of insulation between the wires a, b, which arealways close together in the alarm cirl cuit can be varied, and so also can the sys- ,tem of indicators and alarm signals which are interposed in the circuit.
A cable of the character described comrising a carrier or support provided with fililicoidal grooves therein, a twisted twostrand conductor arranged in each of said grooves, each. strand of each conductor bename to this specication the presence of ing covered with a thin layer of insulating two subscribing witnesses. material and each of said helicoidal grooves being of a depth at least as great as the LOUIS BOBILLOT' i diameter of the twisted conductor disposed Witnesses:
therein. LUCIEN VINCENT,
In testimony whereof I have signed my E. JURAND.
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US2584027 *||Oct 25, 1949||Jan 29, 1952||Kendrick John F||Drilling cable with insulated conductor|
|US2824199 *||Apr 4, 1955||Feb 18, 1958||Acra Electric Corp||Electrical heating element|
|US3291891 *||Mar 23, 1964||Dec 13, 1966||Belden Mfg Co||Shielded electric cables|
|US4181815 *||Jul 12, 1978||Jan 1, 1980||Telefonaktiebolaget L M Ericsson||Self-floating cable for marine operations|
|US5132488 *||Feb 21, 1991||Jul 21, 1992||Northern Telecom Limited||Electrical telecommunications cable|
|US6300573 *||Jul 10, 2000||Oct 9, 2001||The Furukawa Electric Co., Ltd.||Communication cable|
|US6596944||Mar 21, 2000||Jul 22, 2003||Cable Design Technologies, Inc.||Enhanced data cable with cross-twist cabled core profile|
|US6943300 *||Dec 4, 2003||Sep 13, 2005||Nexans||Flexible electrical elongated device suitable for service in a high mechanical load environment|
|US7015397||May 27, 2003||Mar 21, 2006||Belden Cdt Networking, Inc.||Multi-pair communication cable using different twist lay lengths and pair proximity control|
|US7030321||Jul 28, 2004||Apr 18, 2006||Belden Cdt Networking, Inc.||Skew adjusted data cable|
|US7135641||Aug 4, 2005||Nov 14, 2006||Belden Technologies, Inc.||Data cable with cross-twist cabled core profile|
|US7154043||Nov 10, 2003||Dec 26, 2006||Belden Technologies, Inc.||Data cable with cross-twist cabled core profile|
|US7157644||Dec 16, 2004||Jan 2, 2007||General Cable Technology Corporation||Reduced alien crosstalk electrical cable with filler element|
|US7208683||Jan 28, 2005||Apr 24, 2007||Belden Technologies, Inc.||Data cable for mechanically dynamic environments|
|US7214880||Mar 14, 2003||May 8, 2007||Adc Incorporated||Communication wire|
|US7238885||Mar 24, 2005||Jul 3, 2007||Panduit Corp.||Reduced alien crosstalk electrical cable with filler element|
|US7238886||Mar 1, 2004||Jul 3, 2007||Adc Incorporated||Communication wire|
|US7244893||Jun 7, 2004||Jul 17, 2007||Belden Technologies, Inc.||Cable including non-flammable micro-particles|
|US7271343||Feb 1, 2006||Sep 18, 2007||Belden Technologies, Inc.||Skew adjusted data cable|
|US7271344||Mar 9, 2006||Sep 18, 2007||Adc Telecommunications, Inc.||Multi-pair cable with channeled jackets|
|US7317163||Oct 12, 2005||Jan 8, 2008||General Cable Technology Corp.||Reduced alien crosstalk electrical cable with filler element|
|US7317164||Nov 20, 2006||Jan 8, 2008||General Cable Technology Corp.||Reduced alien crosstalk electrical cable with filler element|
|US7405360||Feb 9, 2007||Jul 29, 2008||Belden Technologies, Inc.||Data cable with cross-twist cabled core profile|
|US7449638||Dec 8, 2006||Nov 11, 2008||Belden Technologies, Inc.||Twisted pair cable having improved crosstalk isolation|
|US7491888||Oct 23, 2006||Feb 17, 2009||Belden Technologies, Inc.||Data cable with cross-twist cabled core profile|
|US7511221||Mar 31, 2005||Mar 31, 2009||Adc Incorporated||Communication wire|
|US7511225||Sep 8, 2003||Mar 31, 2009||Adc Incorporated||Communication wire|
|US7534964||Jun 20, 2008||May 19, 2009||Belden Technologies, Inc.||Data cable with cross-twist cabled core profile|
|US7560648||Jul 14, 2009||Adc Telecommunications, Inc||Communication wire|
|US7612289||Nov 3, 2009||General Cable Technology Corporation||Reduced alien crosstalk electrical cable with filler element|
|US7629536||Aug 10, 2007||Dec 8, 2009||Adc Telecommunications, Inc.||Multi-pair cable with channeled jackets|
|US7663061||Oct 23, 2007||Feb 16, 2010||Belden Technologies, Inc.||High performance data cable|
|US7696438||Apr 13, 2010||Belden Technologies, Inc.||Data cable with cross-twist cabled core profile|
|US7759578||May 20, 2008||Jul 20, 2010||Adc Telecommunications, Inc.||Communication wire|
|US7816606||Oct 19, 2010||Adc Telecommunications, Inc.||Telecommunication wire with low dielectric constant insulator|
|US7897875||Nov 19, 2008||Mar 1, 2011||Belden Inc.||Separator spline and cables using same|
|US7964797||Jun 21, 2011||Belden Inc.||Data cable with striated jacket|
|US7977575||Jul 12, 2011||Belden Inc.||High performance data cable|
|US8022302||Jul 1, 2009||Sep 20, 2011||ADS Telecommunications, Inc.||Telecommunications wire having a channeled dielectric insulator and methods for manufacturing the same|
|US8030571||Jun 30, 2010||Oct 4, 2011||Belden Inc.||Web for separating conductors in a communication cable|
|US8198536||Oct 7, 2008||Jun 12, 2012||Belden Inc.||Twisted pair cable having improved crosstalk isolation|
|US8237054||Aug 7, 2012||Adc Telecommunications, Inc.||Communication wire|
|US8319104||Feb 12, 2010||Nov 27, 2012||General Cable Technologies Corporation||Separator for communication cable with shaped ends|
|US8455762||Sep 22, 2010||Jun 4, 2013||Belden Cdt (Canada) Inc.||High performance telecommunications cable|
|US8497428||Sep 8, 2011||Jul 30, 2013||Belden Inc.||High performance data cable|
|US8525030||Aug 31, 2011||Sep 3, 2013||Adc Telecommunications, Inc.||Communication wire|
|US8536455||Jun 30, 2011||Sep 17, 2013||Belden Inc.||High performance data cable|
|US8624116||Aug 31, 2011||Jan 7, 2014||Adc Telecommunications, Inc.||Communication wire|
|US8641844||Sep 19, 2011||Feb 4, 2014||Adc Telecommunications, Inc.||Telecommunications wire having a channeled dielectric insulator and methods for manufacturing the same|
|US8664531||Mar 27, 2009||Mar 4, 2014||Adc Telecommunications, Inc.||Communication wire|
|US8729394||May 5, 2003||May 20, 2014||Belden Inc.||Enhanced data cable with cross-twist cabled core profile|
|US8826945 *||Nov 13, 2009||Sep 9, 2014||Thomas M. Clerkin||Apparatus and method for forming wire|
|US8878068 *||Oct 26, 2010||Nov 4, 2014||Goto Denshi Co., Ltd.||Electric wire for high frequency, high voltage and large current|
|US9018530||Jul 25, 2012||Apr 28, 2015||General Cable Technologies Corporation||Separator for communication cable with shaped ends|
|US9336928||Feb 11, 2014||May 10, 2016||Commscope Technologies Llc||Communication wire|
|US20040055779 *||Mar 14, 2003||Mar 25, 2004||David Wiekhorst||Communication wire|
|US20040149484 *||May 27, 2003||Aug 5, 2004||William Clark||Multi-pair communication cable using different twist lay lengths and pair proximity control|
|US20040216913 *||Mar 1, 2004||Nov 4, 2004||David Wiekhorst||Communication wire|
|US20040228419 *||May 27, 2003||Nov 18, 2004||Ba-Zhong Shen||Non-systematic and non-linear PC-TCM (Parallel Concatenate Trellis coded modulation)|
|US20050034891 *||Dec 4, 2003||Feb 17, 2005||Ekeberg Knut Ivar||Flexible electrical elongated device suitable for service in a high mechanical load environment|
|US20050167146 *||Mar 31, 2005||Aug 4, 2005||Adc Incorporated||Communication wire|
|US20050167148 *||Mar 31, 2005||Aug 4, 2005||Adc Incorporated Located||Communication wire|
|US20050269125 *||Aug 4, 2005||Dec 8, 2005||Belden Cdt Networking, Inc.||Data cable with cross-twist cabled core profile|
|US20060124343 *||Feb 7, 2006||Jun 15, 2006||Belden Cdt Networking, Inc.||Multi-pair communication cable using different twist lay lengths and pair proximity control|
|US20070163800 *||Dec 8, 2006||Jul 19, 2007||Clark William T||Twisted pair cable having improved crosstalk isolation|
|US20070193769 *||Feb 9, 2007||Aug 23, 2007||Clark William T||Data cable with cross-twist cabled core profile|
|US20070280611 *||Apr 11, 2007||Dec 6, 2007||General Dynamics Advanced||Grooved jacket for undersea cable and method for manufacturing the same|
|US20080041609 *||Oct 23, 2007||Feb 21, 2008||Gareis Galen M||High performance data cable|
|US20080066944 *||May 3, 2007||Mar 20, 2008||Adc Incorporated||Communication wire|
|US20090025958 *||May 20, 2008||Jan 29, 2009||Adc Incorporated||Communication wire|
|US20090071691 *||Oct 7, 2008||Mar 19, 2009||Belden Technologies, Inc.||Twisted pair cable having improved crosstalk isolation|
|US20090078439 *||Jul 11, 2008||Mar 26, 2009||David Wiekhorst||Telecommunication wire with low dielectric constant insulator|
|US20090120664 *||Jan 8, 2009||May 14, 2009||Belden Technologies, Inc.||Data cable with cross-twist cabled core profile|
|US20090173514 *||Nov 19, 2008||Jul 9, 2009||Gareis Galen M||Separator Spline and Cables Using Same|
|US20100000753 *||Jan 7, 2010||Adc Telecommunications, Inc.||Telecommunications Wire Having a Channeled Dielectric Insulator and Methods for Manufacturing the Same|
|US20100078193 *||Apr 1, 2010||ADC Incorporation||Communication wire|
|US20100096160 *||Dec 23, 2009||Apr 22, 2010||Belden Technologies, Inc.||High performance data cable|
|US20100132977 *||Sep 18, 2009||Jun 3, 2010||Adc Telecommunications, Inc.||Communication wire|
|US20100147550 *||Feb 24, 2010||Jun 17, 2010||Belden Technologies, Inc.||Data cable with striated jacket|
|US20100200269 *||Feb 12, 2010||Aug 12, 2010||General Cable Technologies Corporation||Separator for communication cable with shaped ends|
|US20100218973 *||Jan 28, 2010||Sep 2, 2010||Camp Ii David P||Separator for communication cable with geometric features|
|US20100263907 *||Oct 21, 2010||Belden Technologies, Inc.||Web for separating conductors in a communication cable|
|US20110005806 *||Jan 13, 2011||Belden Cdt (Canada) Inc.||High performance telecommunications cable|
|US20110061894 *||Nov 18, 2010||Mar 17, 2011||Clerkin Thomas M||Apparatus and method for forming wire|
|US20110095857 *||Oct 26, 2010||Apr 28, 2011||Goto Denshi Co., Ltd.||Electric wire for high frequency, high voltage and large current|
|US20110155419 *||May 5, 2003||Jun 30, 2011||Cable Design Technologies Inc. dba Mohawk/CDT||Enhanced Data cable with cross-twist cabled core profile|
|USRE32225 *||May 22, 1984||Aug 12, 1986||Harvey Hubbell Incorporated||Oil well cable|
|U.S. Classification||174/113.00R, 200/52.00R, 57/212, 174/115|