Rule Advertising Marlin-Rockwell Company


The top edge of this steel ruler has a 15.2 cm scale, divided to millimeters. The bottom edge has a 6" scale, divided to 1/32". The ruler is marked: STAINLESS. It is also marked: MADE IN U.S.A. The back of the ruler is marked: MRC BALL AND ROLLER BEARINGS (/) MARLIN-ROCKWELL COMPANY DIVISION OF THOMPSON RAMO WOOLDRIDGE INC.

The Marlin Rockwell Corporation formed after World War I through the mergers of several American makers of ball bearings, including Standard Roller Bearing Company, Gurney Ball Bearing Company, and Strom Bearing Company. The firm merged with TRW, Inc., in 1964. According to the donor, the instrument was used by her husband, the electrical engineer Robert H. Wieler (1923–1993).

References: MRC Bearing Services, "MRC History," in Engineering Handbook (Kulpsville, Penn., 2005), 6,; accession file.

Date Made: mid-20th century

Distributor: Marlin Rockwell Corporation

Location: Currently not on view

Place Made: United States

Subject: MathematicsRule, MeasuringPromotional Item


See more items in: Medicine and Science: Mathematics, Science & Mathematics, Scale Rules


Exhibition Location:

Credit Line: Gift of Norma P. Wieler

Data Source: National Museum of American History

Id Number: 1998.0032.07Catalog Number: 1998.0032.07Accession Number: 1998.0032

Object Name: scale rulerule

Physical Description: steel (overall material)Measurements: overall: .1 cm x 16 cm x 1.1 cm; 1/32 in x 6 5/16 in x 7/16 in


Record Id: nmah_694130

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