Braking mechanism
A braking system is a mechanical device that ensures that the descending wagons are decelerated when conveyed on braking mountains . The structure of the brake mechanism is very similar to that of the hooks used in mining ; they are also known as brake reels .
construction
On a mounted shaft there is a cable carrier over which the cable is guided. For smaller brake mountains only short ropes are required, so that often only a round tree was used. In the case of larger braking systems, rope baskets are used on which the ropes are wound. Both ropes are wound in opposite directions so that one rope is unwound when the other is wound up. There are also braking mechanisms in which reels are used as cable carriers. There are also brake mechanisms that have a disc arranged horizontally. This disc is provided with a groove in which there is a fireproof friction lining. With this design, the braking force is transmitted through friction. In all constructions there is a brake that is applied when not actuated.
brake
Shoe brakes or disc band brakes are used as brakes. In the case of smaller brakes, the brakes are made of wood, while larger brakes are made of cast iron. The brakes are automatic. They are closed by an attached weight. With wooden shoe brakes, grooved woods press against the brake disc. There are one-sided and two-sided shoe brakes. Two-sided shoe brakes have a better braking effect. With the band brake, a brake band wraps around the circumference of the brake disc. With larger brakes, the brake bands are divided into two parts. In iron brakes, the brake band or the brake shoes are made of heat-resistant material; asbestos blocks or an asbestos belt are usually used for this.
service
The braking system was operated by a miner who was called a brakeman according to his job. In order to set the coupled wagons in motion, the brakes of the braking mechanism had to be released. To do this, the weight that blocked the brake had to be lifted. Depending on the version of the braking mechanism, this was done using a foot lever or a hand lever. To brake the descending load, only the lever had to be released and the weight pulled the brake back on.
Individual evidence
- ^ Heinrich Veith: German mountain dictionary with evidence. Published by Wilhelm Gottlieb Korn, Breslau 1871
- ↑ a b c Gustav Köhler: Textbook of mining science. 6th edition, published by Wilhelm Engelmann, Leipzig 1903
- ↑ a b c d Emil Stöhr: Catechism of Mining Studies. Lehmann & Wentzel bookstore for technology and art, Vienna 1875
- ^ A b c d Carl Hellmut Fritzsche: Textbook of mining science. First volume, 10th edition, Springer Verlag, Berlin / Göttingen / Heidelberg 1961
- ↑ Albert Serlo: Guide to mining science. Second volume, 4th edition, published by Julius Springer, Berlin 1884