Wye Level
name: label: patentee
content: Wissler, Adolph
label: maker
content: A.S. Aloe and Company
notes: label: Description
content: This "Convertible Level" is based on the patent (#1,234,520) for a combined level and transit granted on July 24, 1917, to Adolph Wissler (1866–1926), the St. Louis instrument maker who made many of the surveying instruments sold by Aloe. With the telescope in its standard position, it is a standard architect's level. With the telescope turned 90 degrees, it can be used to take vertical sights. The small horizontal circle is graduated to degrees, and read by vernier to 5 minutes. The level is provided with a metal trivet for setting up the instrument in places where the use of a tripod is difficult. The level is marked "A. S. Aloe Co. St. Louis 90607" and "PAT. 7-24-1917." New, it cost $75.
label: Description
content: Ref: A.S. Aloe Co., <i>Instruments and Supplies for Civil Engineers, Architects, Surveyors</i> (St. Louis, about 1919).
label: Location
content: Currently not on view
place: label: place made
content: United States: Missouri, St. Louis
setName: label: See more items in
content: Medicine and Science: Physical Sciences
label: See more items in
content: Surveying and Geodesy
label: See more items in
content: Measuring & Mapping
publisher: label: Related Publication
content: A. S. Aloe Co.. Instruments and Supplies for Civil Engineers, Architects, Surveyors
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: PH.337201
label: patent number
content: 1234520
label: accession number
content: 1979.0584
label: catalog number
content: 337201
objectType: label: Object Name
content: wye level
physicalDescription: label: Measurements
content: telescope: 12 1/2 in; 31.75 cm
label: Measurements
content: horizontal circle: 3 1/2 in; 8.89 cm
label: Measurements
content: overall in case: 7 1/2 in x 13 5/8 in x 5 1/4 in; 19.05 cm x 34.6075 cm x 13.335 cm