HEAVY CONCAV
letter scale

maker: Ph.J. MAUL bruine lijn

letter scale

This QUADRANT letter scale by Ph. J. Maul has a solid cast iron frame. On the back of the black painted cast iron frame is hardly readable the M logo of Philipp Jakob Maul. The bright enamelled chart is fixed onto the frame with three aluminum rivets. The weighing mechanism is mounted at the top in an U shaped part. This U shape is riveted onto the cast iron frame. At the height of the upper fixed pivot the frame has an transit hole. The second fixed pivot is directly fastened into the frame. The mechanism and the plate are of tin with a thin copper colored ornamental protective coating. The lining of this frame is simple and firm. More beautiful designed frames do exist for these types of letter scales. I don't know whether this design is patented. This letter scale has two ranges: from 0 till 200 grams and from 0 till 1000 grams. To use the higher

rear of the letter scale

range one must first rotate the counterweight to the lower position on the lever. Different designed weighing plateaus exist, for instance an aluminum bowl. Also specimens with lower ranges can be found: 100/500g and 50/250g. Rare designs with another extra pendulum weight are known. With that extra weight even three weighing ranges are available. The chart with the name concav is better readable thanks to the form slightly bent out of the vertical plane. It's applied on more models. The 200 grams chart has a division stripe per each gram. The 1000 grams scale has a stripe per ten grams. Each area of ten grams is divided into two by a chequered band at the outer edge of the scale. Below some more detailed pictures of this solid heavy letter scale.

ranges 1000g and 200g	200g-range: 1 stripe per gram	Ph.J.Maul-logo and the concav mark
red indicator strip	pendulum weight	cutouts in cast iron frame
concav position of curved scale	zero leveling screw	firm rotatable feet

« Sol collection: part 3«

version: February 16, 2009

HEAVY CONCAVletter scale

HEAVY CONCAV
letter scale