Theodore Bergner Section Liner
name: label: maker
content: Bergner, Theodore
notes: label: Description
content: This instrument consists of an isoceles right triangle in brass, with a hole of the same shape. A thumbscrew attached to the hypotenuse of the of the triangle holds a shaped metal plate which can rotate. Attached to this plate is a lever somewhat resembling a telegraph key. There is no rule nor room in the case for a rule. On April 2, 1872 Bergner took out a patent for a parallel ruler. However, it had a rule and a prawl not in this instrument. The instrument is in a velvet-lined, leather-covered case.
label: Location
content: Currently not on view
place: label: place made
content: United States: Pennsylvania, Philadelphia
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
label: See more items in
content: Single Drawing Instruments
creditLine: label: Credit Line
content: Gift of Allen A. Samuels
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1985.0438.01
label: accession number
content: 1985.0438
label: catalog number
content: 1985.0438.01
objectType: label: Object Name
content: Section Liner
label: Object Name
content: section liner
physicalDescription: label: Measurements
content: overall: 3.5 cm x 14.2 cm x 14.2 cm; 1 3/8 in x 5 19/32 in x 5 19/32 in