DE595068C - Safety fuse - Google Patents

Description

- 5th

20th

35

All previously known and used ignition mixtures that serve to triggering any combustion processes essentially consist of the following Share:

1. chemically unstable substances, easily decomposing with the release of oxygen, such as chlo'-rate, Nitrates, chromates, super oxides, etc .;

2. highly flammable substances, d. H. those with a sufficiently low ignition temperature, such as phosphorus, sulfur, carbon or compounds thereof;

3. Additions from hard, chemically indifferent bodies; to increase friction, like Quartz, pottery shards, pumice stone, etc .;

4.Binding agents, such as glue, starch, gum arabic, etc.,

5. Possibly means that prevent too violent burning and serve as an incandescent body, such as z. B. Oxides of zinc, iron, etc.

All ignition mixtures combined for Bengali purposes are included in this compilation disregarded.

The substances listed in the important group 2, which trigger the actual ignition, now all burn down with more ¹ or less violent flames and develop foul-smelling or even poisonous gases. As a result, the use of such ignition masses is excluded wherever either open flames or combustion gases are very unpleasant or dangerous and harmful.

The present invention now describes a new type of safety ignition mixtures, which can be easily ignited on the well-known prepared friction surfaces for the usual safety matches and the above Do not show evils, d. H. they glow without a flame and do not develop any odorous ones or toxic gases. Despite the easy flammability, it is the same as with the known ones Safety ignition masses exclude spontaneous combustion. These new ignition mixes therefore come into consideration, in addition to other areas of application, primarily for detonating heads on tobacco products, in that they can be attached directly to cigars, cigarettes, etc. so that they can set on fire easily and without developing malodorous or toxic gases. The pack of tobacco products can advantageously be provided with the friction surface, similar to what is customary with the well-known matchboxes. The smoker will This not only relieved the need to carry special lighters, but also the tobacco products can be ignited comfortably and safely, especially in strong drafts, as they are not must be brought into contact with an open flame.

According to the invention, instead of the easily flammable, but produce more or less unpleasant or harmful gases Substances Metals with a sufficiently low ignition temperature, such as B. Magnesium, Iron, aluminum, zinc, cobalt, nickel, etc., or combinations thereof, in particular but semi-pyrophoric iron, used

which do not provide volatile combustion products, but rather solid, powdery form when burned Oxides pass over. The easy flammability of the metals in question, d. H. the conversion to the semi-pyrophoric form - under a semi-pyrophoric state of metals is an intermediate stage in terms of flammability between the well-known pyrophores, in the air itself

ίο the flammable and the usual, relatively difficult to ignite form of metals (between 100 and 350 ⁰ ) is to be understood - ■ takes place by reduction in the hydrogen stream at around 400 °. Iron in particular, but also nickel and cobalt, can easily be obtained in this form and are therefore particularly suitable for present purposes.

Embodiment

20 parts of potassium chlorate
20 - semipyrophoires iron
10 - potsherds, powdered
r part of gum arabic.

The mixture of these substances, finely powdered, becomes one with a little water Thick porridge mixed and spread on the goods to be ignited, sprayed on or possibly pressed on, so that after drying in the air it becomes firmly adherent Forms ignition head.

Of course, the ignition masses can be placed on any fire-sensitive support and so to ignite any flammable substances to serve.

Claims (1)

Claim: Safety primer that ignites by rubbing against prepared friction surfaces, in particular for tobacco products, characterized in that they are apart from the usual friction and binding agents from a sulfur- and phosphorus-free one Mixture of oxygen carriers (ζ. Β. Potassium chlorate) and highly flammable metals, especially semi-pyrophoric iron.