HEAVY CONCAV
letter scale

maker: Ph.J. MAUL
bruine lijn
letter scale, maker: Ph.J. MAUL
letter scale by Ph.J. MAUL
 

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 two 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: 0 till 50 grams and from 0 till  250 grams.  To use the higher range
 

rear of the scale
rear of the scale
 
letter scales
50/250g scale in front of a
scale with ranges 100/500g
letter scales
at the left a 100/500g scale
at the right a 50/250g scale

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 higher ranges can be found: 100/500g and 200/1000g. 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. Below some more detailed pictures of this solid heavy letter scale.

detail 1
M-logo + concav mark
 
detail 2
red indicator
 
detail 3
slanting designed chart
 
detail 4
M-logo in the cast iron frame
 
detail 5
shining enamel
 
detail 6
niet voor handelsdoeleinden
= not legal for trade (in Dutch)
detail 7
elegant rotatable foot
detail 8
zero leveling screw
 
detail 9
slanting designed chart
detail 10
ranges 50 and 250g
 
detail 11
back of scale
 
detail 12
shining chart
 
bruine lijn
« Sol collection: part 3«       © copyright André Sol version: February 16, 2009