Drawing accompanying a Topf patent application of 16th November 1942 for “Air cooled grate plates tor mechanical grate firing”. It is essentially a wartime (period of shortages) patent. making it possible to fire a furnaces with fuel of differing quality, depending on what is available, while maintaining the correct heating capacity and without damaging the fire grate.
Translation:
18/6/45
ri. [Ritter]
Memorandum
from
Personnel section
[Upper right: Rubber stamp of the Topf management
secretariat. dated 25th April 1945]
Subject: Kurt Prüfer
Herr Prüfer was held for questioning from 30/5 — 13/6
Should these days be paid ? [manuscript] Yes
(P. worked 5 hours a day until his arrest)
J. A. TOPF & SONS
Personnel Section
[signed] Ritter