Method of manufacturing a bulb for a cathode-ray tube, and bulb

Details Method of manufacturing a bulb for a cathode-ray tube, and bulb Method of manufacturing a bulb for a cathode-ray tube, and bulb

1976-08-16

1977-09-27

Kellogg, Arthur D.

Receptacles

Envelope for electric lamp or similar device

Tv tube

65105, 65109, 313477R, C03B 2308

Patent

active

040506010

ABSTRACT:
An envelope for an oscilloscope tube is formed by simultaneously rotating and heating a glass tube and upsetting the heated tube, to form a cylindrical section having uniform thickness and varying diameter. The thus formed envelope portion is then pressed into a shape having a rectangular cross-section, without changing the circumference, in order to maintain the thickness of the envelope.

REFERENCES:
patent: 1888635 (1932-11-01), Koenig
patent: 3263852 (1966-08-01), Fridrich

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