Mercury vapor in the upper part of the envelope must dissipate heat through the glass envelope in order to condense and return to the cathode pool.
42.
Conceived as a minimalist glass envelope, the new lobby is designed to be deferential to Foster's structure and appears almost to be part of the original.
43.
As with loctal tubes, the pins of miniature tube are stiff wires protruding through the bottom of the glass envelope which plug directly into the socket.
44.
Second, the quartz envelope used to manufacture halogen bulbs is ( unless specially treated ) transparent to UV, unlike the glass envelope used for conventional incandescent bulbs.
45.
A six-phase rectifier rated 150 amperes has a glass envelope approximately 600 mm ( 24 inches ) high by 300 mm ( 12 inches ) outside diameter.
46.
The glass envelope is about 2-5 / 16 " in diameter and 6 inches tall, with the a total tube height of about 7-7 / 8 inches.
47.
The glass envelope of an octal base tube was cemented into a bakelite or plastic base with a hollow post in the center, surrounded by eight metal pins.
48.
The element is usually packaged inside a glass envelope resembling a light bulb and with a reflector to direct the energy output away from the body of the heater.
49.
A very few early semiconductors were packed in miniature evacuated glass envelopes, like flashlight bulbs; such expensive packaging was made obsolete when surface passivation and improved manufacturing techniques were available.
50.
The essence of his idea was that a filament would glow within a glass envelope from which the air had been evacuated when electrically energized with direct current ( DC ).
