LEE
gunpowder scale

maker: Lee Precision, Inc. Hartford, Wisconsin, U.S.A. bruine lijn

Lee powder scale

the Lee gunpowder scale is made by Lee Precision, Inc. from Hatford, Wisconsin, U.S.A.. The weighing range is 110 grains, that is converted 7.128 grams. This gunpowder or powder scale has magnetic damping. In the aluminum house, at the left near the slit there are two magnets that inhibit the movement of the plastic scale arm by exerting a counterforce on the aluminum scale arm part part. (Search for 'Eddy current brake' or 'magnetic damping'). The used magnets are somewhat weak so the up and down movements relatively still take a long time. The fine reading on the sliding part is rather special, a variation on the nonius or vernier slider, see Wikipedia.
Previously, a gunpowder scale with a larger weighing range has been shown, see Lyman. This Lyman gunpowder scale has a similar magnetic damping.
Below som more images of the Lee precision powder scale.

back of the powder scale

the aluminum scale base	the scale beam with ball poise and fine adjustment	aluminum weighing pan next to the other scale parts on the left at the end of the beam is the aluminum plate on which the magnet damping is exercised
scale from above shows the ball and the 10 positions on the left the aluminum plate in the slot of the magnetic damping is clearly visible	the weighing pan hangs on the beam	animation: [move the pointer over the photo] the weighing pan balances the powder scale

the ten positions for the ball weight	the unloaded powder scale is in equilibrium	nonius or vernier-like sliding part for weighing to do in 0.1 grain (= 0.00648 gram)
test with a weight of 5 grams	the 5 grams weight in the scale pan	check on a digital scale
the scale is in balance on 70 grains plus some more	here the ball weight on 70 grains can be seen better	the slider bottom right is at 6 nearly 7 grains the vertical lines above are at 7, 8 and 9 result: the weight weighs 76.8 grains = 4.977 grams