Research/Patents/US 5990601
US 5990601

ELECTRON MULTI METH/APP

Assignee

Filed

Feb 22, 1971

Granted

Nov 23, 1999

Location

SEPULVEDA CA US

Abstract

A channel-type electron multiplier and a method and apparatus for rounding off the sharp circular edges, fissures and protrusions at the ends of the holes in the glass plate. In order to do this a temperature gradient is produced through the plate so that only a small portion is heated above the glass softening temperature. The plate thus does not collapse or melt. The said rounded edges improve performance by reducing field emission, noise and photocathode contamination. An electrically heated nichrome wire provides heat pulses at regular intervals. An alternative method utilizes an optical lap after core glass in the plate holes has been partially etched out.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Feb 4, 1982

Rescinded

Oct 23, 1998

Duration

16 years, 8 months

Inventor

  • 1RICHARD K. ORTHUBER

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Back to patent indexSource: USPTO 35 USC §181 secrecy order records