Pyrex Insulator

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Object Name: 
Pyrex Insulator
Accession Number: 
98.4.349
Dimensions: 
H: 16.9 cm; Diam: 23.1 cm
Location: 
Not on Display
Date: 
1927-1932
Credit Line: 
Gift of Corning Inc., Dept. of Archives and Record Management
Primary Description: 
Colorless non-lead borosilicate glass; pressed; roughly hemispherical in shape; circular crown divided into two equal parts by semicircular channel (saddle wire groove), white sticker with "1946" and other illegible writing on it stuck to top of one half of crown; side wire grove; umbrella of glass extends out from bottom of side wire groove, remnants of paper label stuck to top of umbrella; skirt tapered out to bottom, bottom rounded out to base; "CORNING PYREX® T.M.REG. U.S.PAT.OFF. MADE IN U.S.A." and "I/401" molded into skirt around bottom; smooth base; inner skirt, number "74.502" written in black ink on base of inner skirt; threaded pinhole.
Provenance: 
Corning Inc., Dept. of Archives and Record Management, Former Collection
Color: 
Technique: