R. Bischoff letter scale | This large letter scale with a height of 50 centimeters originates from R. Bischoff from Munich in Germany. This scale has two weighing ranges in Gramm. The special feature here is that the inner scale ends at 250 grams and the outer scale starts at 250 grams. Each gram up to 500 grams has its stripe of measure. The scale has a large flip-over counterweight. The letter scale has two knife-edge bearings: the main bearing and also the suspension bracket of the hanging scale part has a knife-edge bearing. It takes a very long time to finish scale movements. Previously another Bischoff was presented, see V. Bischoff, there is some more background information. The scale parts are bearing the number 6479, that number is also on the scale. This embodiment has, instead of the wire with a small brass weight, a spirit level to assist in setting the scale level. To avoid damaging the counter surface the adjusting screws press against a separate thin plate. One of the leveling screws is not original. This letter scale also has verification stamps. The meaning of the abbreviation P.W. on the scale is still unclear. | back of the letter scale |
the letter scale loaded with 250g in the range 0-250g |
the letter scale loaded with 250g in the range 250g-500g | the letter scale loaded with 500g in the range 250g-500g |
the Bischoff is a large heavy low friction letter scale |
the suspension bracket has a knife-edge bearing on the load arm of the letter scale |
the screw secures and limits the movement |
the mounted knife-edge bearing with number 6479 displayed on the lever edge |
the pans wherein the knife tilts |
the knife part of the bearing |
the verification marking, recognizable is '59 |
the suspension bracket for the stem of the hanging letter tray |
maker R. Bischoff Munich, abbreviation P.W. and the scale number 6479 |
unit of measure Gramm weighing ranges 250 en 500 |
the leveling screw presses against a separate thin base plate |
scale base with two leveling screws and a spirit level to level the letter scale | the spirit level helps to establish a level letter scale |
« collection part 17 « | © copyright André Sol | version: November 30, 2016 |