Object Details
- Description
- Leonarde Keeler (1903-1949) developed and promoted polygraphs, first in California and later in Chicago. This example probably dates from the mid-1930s. An inscription reads “KEELER / POLYGRAPH / 110 VOLT 60 CYCLES SERIAL 1235 MODEL D / CHART FEED 3-6-12 INCHES PER MIN. / CHART No SO115 SKRIP INK / MFD. BY / WESTERN ELECTRO-MECHANICAL CO. INC. / OAKLAND. CAL. / PAT. No. 1788434.”
- Ref: Leonard E. Keeler, “Apparatus for Recording Arterial Blood Pressure,” U.S. Patent 1,788,484 (Jan. 13, 1931).
- “Keeler, Famed As Inventor Of Lie Test, Dies,” Chicago Tribune (Sept. 21, 1949), p. 30.
- Location
- Currently not on view
- Data Source
- National Museum of American History
- maker
- Western Electro-Mechanical Co., Inc
- Credit Line
- American Polygraph Association
- Physical Description
- wood (overall material)
- plastic (overall material)
- metal (overall material)
- paper (overall material)
- Measurements
- overall: 28.5 cm x 45.4 cm x 24.4 cm; 11 1/4 in x 17 7/8 in x 9 5/8 in
- Object Name
- Polygraph
- Other Terms
- Polygraph; Diagnostic Medicine
