micro rule in case
Date: after 1951
Inventory Number: 2014-1-0106
Classification: Rule
Subject:
Manufacturer: Theodore Alteneder & Sons (1910s- 1970s)
Dimensions:
1.5 × 52.5 × 4 cm (9/16 × 20 11/16 × 1 9/16 in.)
case: 4.3 × 57 × 7.3 cm (1 11/16 × 22 7/16 × 2 7/8 in.)
Material:
Description:
2 rules in 2 wooden cases
In Collection(s)
Inscribedon the front of 2 rules: (on the left) DO NOT FORCE / DIAL BEYOND ZERO LINE (on the right side) MICRO-RULE / PAT. NO. 2554099
on the back of 2 rules: THEO. ALTENEDER & SONS PHILA. PA. / STAINLESS STEEL
on the 2 bolts of the 2 cases: NIELSEN / HARTFORD
on the back of 2 rules: THEO. ALTENEDER & SONS PHILA. PA. / STAINLESS STEEL
on the 2 bolts of the 2 cases: NIELSEN / HARTFORD
FunctionThe micro-rule allows for measurements of greater precision than a traditional marked ruler thanks to an internal mechanism and dial.
ProvenanceLionel Spiro, Brookline, MA; Gift to CHSI, 2014.