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Primary Examiner: Shoop, William M.
Assistant Examiner:
Attorney: Sotak; J. B., McIntire, Jr.; R. W.

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Title: Fail-safe four leaded zener diode arrangement

Abstract: This disclosure relates to a fail-safe voltage regulating arrangement including a current limiting resistor and a four leaded zener diode having two separate conductive leads electrically connected to the cathode electrode and two other separate conductive leads connected to the anode electrode for producing a constant d.c. voltage barring a critical component or circuit failure.

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Other info:

Inventors: Hufnagel, Andrew (Pittsburgh, PA, US)

Application Number: 426031
Filing Date: 1973-12-19
Publication_date: 1976-03-23
Assignee: Westinghouse Air Brake Company (Swissvale, PA)
Primary Class(es): 361/56 257/603, 257/E27.044, 327/580, 327/584, 361/91.5
Other Classes:
US Patent Ref:

2841771	Jul, 1958	Dunleavey	333/79.
3275845	Sep, 1966	Sanky	317/235.
3439230	Apr, 1969	Lambert et al.	317/230.
3527985	Sep, 1970	Brown	317/16.
3614539	Oct, 1971	Hallenbeck	317/31.
3624449	Nov, 1971	Morgan	317/31.
3813578	May, 1974	Tiffany	317/31.
3842334	Oct, 1974	Franz	321/2.

Other Refs: Other References: Electronics, Langford, "Three Approaches to Microminiaturization," pp. 49-51, Dec. 11, 1959.
Motorola, Silicon Zener Diode and Rectifier Handbook, Third Edition, p. 156, 1961.