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Archives of an email list on the history of binoculars. - page 50 / 150

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2 Cutting with diamond

3 Photographic layer.

Presently new methods of etchings are tested.

The company would not tell us anything about the first two methods. Only that they were difficult and that they only had a 50 % success ratio.

The photograpic method:  The needed pattern is drawn 50:1, inverted, after that, it is transferred to a glass plate, in 1:1.

the glass plate is then cut to the needed size, and balsamed with another piece of glass, with the graticule pattern at the inside. It is then ready for assembly.

Graticules for stereotelemeters are made this way.

Invertelemeter 0.5 meter basis.

Measuring distance is up to 10000 meters. The weight is very low, and the instrument rest against the users belt or on a small rig, when in use.

It was used during the war by the austrian infantry.

Dr. Eppenstein, who himself was on active service during the war, and who is the expert on these instruments, declared that this was the only way to make rangefindings in the future, as all findings would have to be taken while under cover.  He believed the instrument to be sufficient accurate.

The instrument was also interesting to the german army, but it was felt too risky to switch to a new type of instrument during the war. It did see service with german army mine thrower units. The german army had ordered 2000 units in 1918, but they were not completed prior to the armistice.

All but 220, that the entente has allowed the german post war army, had been destroyed.

Rifleman inverttelemeter basis 0.7meter.

Very light, only 2 kilo, was useable like our rangefinder model 1915.

No measuring drum, only a simple range scale from 200-3000 meter.

The operator rest on his elbows,  measuring by moving the ends of the instruments to and fro, until the two pictures inside stands above each other. The distance is then read directly on the scale.

The German foot artillery angle meter, with compass.

As Captain Leineweber, who should demonstrate the instrument has been busy with meetings, I only had a brief chance to inspect the instrument.

(here follows some details on the instrument)  Signed: Falking.

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My comment:

The numbers of destroyed instrument must be regarded with some caution.

the sheer number is meant to make the visitors sympathetic, and undoubtedly it has been a chock for the mangement to see french soldiers destroy their wares with large hammers, or how they did it.

On the other hand, inflating the numbers will also increase the money one can claim from the state. After all, the state must somehow compensate this, don´t they?

We even get one glimpse: the 2000 0.5 meter finders wasn´t all destroyed. After all, 220 had survived, and they seem not even to have been completed.

Why do I claim, it was french soldiers?

10 years back, I did some work into the IAKK or  the IACC. And at that time, I learned that the french were particular hatefull and was well aware that anything they destroyed, was a loss to Germany.

The leader of the IACC, who was responsible for the disarmament of Germany, was french.

He was okay, but his subordinates were not. We have a british officers memoires of the work, and he had a severe dislike of the french, after that experience.

Unfortunately, I don´t read french well.. I really liked to have a french view too.

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