US2566560A - Permanent match - Google Patents

Description

B. EDELBERG 2,566,560

PERMANENT MATCH Filed Jan. 9, 1948 gym?.

Patented Sept. 4, 1951i VoFFlci-z 2,566,560 PERMANENT MATCH Benjamin Edelberg, Chicago, Ill.

Application January 9, 1948, Serial No. 1,428

1` Claim. l

This invention relates to repeatedly ignitible matches. Such repeatedly ignitible matches are known which consist of a combustible rod, or stick in which an igniting mixture is dispersed, the latter being a mixture of an oxygen-supplying compound, for example, potassium chlorate, and a deflagrating substance, for example, sulfur, or benzoyl peroxide. In the present specification, deagrating substances mean such solid combustible materials whose mixture, with a sufficient quantity of an oxygen-supplying substance, as for example, potassium chlorate, is explosive or ignitible by friction. The necessity for introduc-- ing such an igniting mixture makes the production of the match dangerous. Further, if the sticks contain enough gniting mixture to produce easy ignition by friction, the speed of combustion of the stick becomes too high for practical purposes, and it becomes diicult to extinguish. For this reason, hitherto the quantity of igniting mixture has been reduced so far that the stick, when cold, could not or could only with great difliculty be ignited by friction, so that ignition by rubbing could only be effected if the stick was heated or was still warm from a previous ignition.

Another repeating match is known wherein a friction igniting mass is embedded as a longitudinal core within a combustible mass. The friction lgniting mass consists of an oxygen yielding substance like the alkali chlorates, mixed with a lesser portion of an ignitible substance, the whole massed and moulded into various shaped cores. The surrounding combustible mass consists of a slow-burning fuel, as for example, metaldehyde or methenamine, stiifened with celluloid. The drawback in this match is that there is no control upon the rate of combustion of the friction igniting core, and in some cases a crater is formed before the match is extinguished, thereby precluding further ignitions of the match. In other cases the supply of oxygen is increased by the heat of combustion and the core burns out with violence. Another drawback is that the presence of a chlorate in the match makes the whole manuf-acture dangerous, and the use of the match unpredictable, since the burning match will raise the temperature of the stick and thereby increase the release of oxygen from the oxygen-supplying substances, and the rate of combustion will mount dangerously. Then too, the difficulty of producing these matches with embedded cores makes large production exceedingly difcult.

My invention is based primarily upon the complete separation of the oxygen-supplying sub- Stance from the combustible material immediatestance the alkali chlorates, i. e. potassium chlorate or sodium chlorate, may be used. The combustible materials may be of the class of solid organic materials, i. e., hexamethylene tetramine, metaldehyde, dimethyloxamide, etc. The oxygensupplying substance is pressed into tablets of a convenient shape or form, and the combustible material is pressed into the same shape. I find an approximately one-eight inch thickness most convenient. In order to completely separate the oxygen-supplying substance from the fuel, the tablets are dipped into and coated with a substance that will isolate each from the other throughout their length, and at the same time bind them together (Fig. 4). A solution of sodium silicate or an'asbestos plastic is most useful. After they are thoroughly dried the coating is removed from one end. Upon striking on a suitable striking surf-ace, that surface is ignited by the chlorate for an instant. The heat of that instantaneous ignition will further decompose the chlorate, then the heat of friction, together with the heat of deflagration, plus the added supply of oxygen at its point, Will ignite the combustible material. The combustible material then burns at an even, quiet rate without the added turbulence of an internal oxygen source. Fig. 1 shows the combustible material, the shape being variable. Fig. 1, the reference numeral 2 denotes the binding material which also coats the oxygen source and both separates the two substances in their chemical activity and at the same time holds them together. The substance containing the oxygen contains no combustible material and therefore cannot ignite, which precludes any violent burning or explosion. Fig. 3, the reference numeral 3 denotes the oxygen-supplying material. The amount of substance in each part may be adjusted in width or concentration, so that each will be used up at the same rate.

The disadvantage in that the oxygen supply or the fuel may be used up faster than the other is overcome by the device in Fig. 8. The combustible stick (Fig. 8) is held in a holder. The oxygen-supplying substance stick is held in the other holder. The holders are mounted as arms of an elastic metal or spring, denoted by numeral 5 that will bend easily. When igniting, the tips are pressed lightly together (Fig. 9) and struck on the friction surface. The striking surface will ignite for an instant, which will ignite the fuel, as above. The instant ignition is achieved the pressure upon the spring is released and the fuel will continue to burn evenly. The sticks of material may be adjusted, raised, or lowered, to even them, or they may be replaced separately when Parts by weight Amorphous phosphorus 8 Black antimony sulfide 4 Cement 1 Gum tragacanth f1 Parts by weight Red phosphorus 4 Black antimony sulfide 4 Powdered .glass 1 Gum acacia 1 Cement l In "ordertoepromote the decomposition or the activity vof the chlorates, Aoxides V'of the `second analytical "group may "be used, 'for example: (FeeOs) ('FeaOt) '(ZnO') (CuOz) in 'quantities up to five per cent of 'the Yweight 'of the chlorate.

What I claim is:

A match adapted to be extinguished by blowing and ignited by friction comprising a combustible having as its sole substance a solid organic material of the class consisting of hexamethylene tetramine, metaldehyde, dimethyloxamide, in tablet form; an oxygen-supplying material in tablet form of the class alkali chlorates, and a resilient holder for said combustible and oxygensupplying materials including a spring member having its ends curved uniformly away from its body portion upon a common side thereof toward each other, said ends spaced apart, and arms :carried `by said ends and disposed toward each other yieldingly throughout their extent.

BENJAMIN EDELBERG.

l'-RE1.1:RENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number .Name .Date

1,287,448 Ryden Dec. 10, 19,18 2,093,516 Foldi Sept.s21, 1937 :FOREIGN PATENTS Number vCountry Date 825,228 France NOV. 27, 1937

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