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(21 - 38 of 38)

Title: JPL or Aerojet group
Format: photograph: negative

Title: Security stopwatch
Format: photograph: print
Description: One jewel analog Swiss security stopwatch.

Title: Magnetic relay for electronic switching
Format: photograph: negative
Description: Developed in the 1940s or 1950s for Bell System automatic switching, by R.M. Bozorth (CIT 1922). Mfg. Bell Labs.

Title: Potentiometer, type K-2
Format: photograph: negative
Description: Serial no. 279092. Appears to be Leeds and Northrup model K-2, with some modification to the dials on the right side. See L&N catalog E-50B(3), 1940. Mfg: Leeds and Northrup, Philadelphia, PA.

Title: Aviation altimeter
Format: photograph: print
Description: Kollsman war surplus aviation altimeter.

Title: Army air force bubble sextant
Format: photograph: print
Description: Battery operated, night reading, cylinder recording, bubble sextant for measuring latitude.

Title: Tower drafting set
Format: photograph: print
Description: Comprised of dividers and compasses. Manufactured in Germany.

Title: Keuffel and Esser Le Roy lettering set
Format: photograph: print
Description: Used for drafting. Housed in wooden box.

Title: Wrico lettering set
Format: photograph: print
Description: Used for drafting. Housed in bakelite box.

Title: Spectrophotometer, quartz
Format: photograph: negative
Description: Serial D-282. Phototube housing and lamp housing directly attached to main unit. Attached by cord is undistinguished light gray metal box (power supply regulator?) Mfg. National Technical Laboratories, South Pasadena, CA.

Title: Triode, high frequency (door knob), WE 316A
Format: photograph: negative
Description: Used mainly in GE IFF radio in 1943. Mfg. Western Electric.

Title: Radar switch tube
Format: photograph: negative
Description: Russian copy of Western Electric Mark II 5D21, anti-submarine radar switch tube by H. E. Mendenhall (CIT 1927), J. Westsan and C.H. Elmendorf (CIT 1936). Found on Oregon beach ca. 1948.

Title: Wrico lettering set
Format: photograph: print
Description: Used for drafting. Housed in wooden box.

Title: Wrico lettering set
Format: photograph: print
Description: Used for drafting. Housed in wooden box.

Title: Polaroid Projector Polariscope No. 438
Format: photograph: print
Description: Used for analyzing polarity of objects.

Title: Spectrophotometer, quartz, Model DU
Format: photograph: negative
Description: Serial no. 29649. With phototube housing and lamp housing directly attached. Connected by cord to power supply; cord is frayed. Mfg. National Technical Laboratories.

Title: Wrico lettering set
Format: photograph: print
Description: Small lettering set used for drafting. Housed in wooden box.

Title: Russell W. Porter and a group of gentlemen at Palomar
Format: photograph: print
Series: Academic Divisions
Description: Porter is on the far right.