SMALL-SIZE FLUORESCENT LAMP Russian patent published in 2002 - IPC

FIELD: electrovacuum engineering. SUBSTANCE: fluorescent lamp has long sealed cylindrical envelope with gaseous-discharge region whose inner surface is covered with phosphor, exhaust tube and current leads being fixed to envelope. Lamp is characterized in that glass shells of current leads are paddle- shaped, their length L₁, being chosen with respect to lamp length L₂ in the range of 0,28≤(L₁+αL₂)/L₂≤1,6, where α is experimental coefficient depending on type of envelope material and its thickness ranging within 0,27≤α≤1,3. Maximal paddle width L₃ is chosen relative to envelope maximal thickness L₄ within 0,47≤(L₃+αL₄)/L₄≤3,5. Provided on outer surfaces of paddles on each current lead at distances L₅ from current-lead paddle end within the range of 0,53≤(L₅+βL₁)/L₁≤2,4 are grooves, L₆ in length and L₇ in depth, chosen with respect to maximal cross-sectional area L₈ of sealed metal current lead within 1,2≤(L₆+L₇+βL₈)/L₈≤8,7, respectively, where β is experimental coefficient chosen depending on type of material and thickness of metal current lead within the range of 0,23≤β≤1,7. Flat surfaces of current-lead paddles on opposite ends of lamp are disposed at angle A relative to each other within the range of 0^°≤A≤90^°. EFFECT: enhanced mechanical characteristics and resistance to mechanical impacts; facilitated manufacture. 1 dwg, 1 tbl