Patent US 3453403A

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Patent number US 3453403A (click link for details and documents via Google Patents)
Title Power selection device
Inventors Eldon Hoffman
Company Tektronix Inc
Filing date 1966-08-18
Grant date 1969-07-01


Related products:

Manufacturer Model Description Introduced Designers
Tektronix 115 Pulse generator 1968
Tektronix 140 NTSC signal generator 1969
Tektronix 141 PAL signal generator 1969
Tektronix 144 NTSC signal generator 1971
Tektronix 145 PAL genlock test signal generator 1973
Tektronix 146 NTSC signal generator 1971
Tektronix 147 NTSC signal generator 1971
Tektronix 148 PAL signal generator 1971
Tektronix 149 NTSC signal generator 1973
Tektronix 2101 25 MHz Pulse generator 1970
Tektronix 230 Digital Unit 1967
Tektronix 2601 2601 Mainframe 1971
Tektronix 284 Pulse generator 1967 Fred Kawabata
Tektronix 286 Sampling head multiplexer 1970
Tektronix 453 50 MHz portable dual-trace scope 1965 Oliver Dalton Gene Andrews
Tektronix 454 150 MHz portable dual-trace scope 1967 Oliver Dalton
Tektronix 491 40 GHz Spectrum Analyzer 1966 Gene Kauffman
Tektronix 5030 1 MHz diff-input dual-beam scope 1969 Val Garuts
Tektronix 5031 1 MHz diff-input dual-beam storage scope 1969 Val Garuts
Tektronix 522 Vectorscope 1970 Phil Crosby Ron Olson
Tektronix 545B 30 (33) MHz oscilloscope 1964 John Gates Dave Barton Bob Shand
Tektronix 547 50 MHz oscilloscope 1964 Bob Rullman Keith Taylor John Gates Gene Kauffman George Smith
Tektronix 556 50 MHz dual beam scope 1966 Phil Crosby Larry Biggs Ron Olson Arend Kastelein
Tektronix 561B 10(4) MHz "General Purpose Scope" 1969 Bob Shand
Tektronix 564B Split-screen storage scope 1969 Bob Shand
Tektronix 568 Sampling scope 1967
Tektronix 576 Curve tracer 1969 Jim Knapton
Tektronix 611 11" CRT storage monitor 1967 Norm Winningstad Dan Denham Carlo Infante Stu McNaughton Walt Lowy Leo Heineck
Tektronix 647A 100 MHz scope 1967
Tektronix 7503 90 MHz non-storage mainframe 1970 Phil Crosby Hans Springer
Tektronix 7504 90 MHz non-storage mainframe 1969 Wim Velsink
Tektronix 7704 150 MHz non-storage mainframe 1969 Gene Andrews Bob Shand
Tektronix 7704A 200 MHz non-storage mainframe 1972 Luis Navarro Bob Shand Bill Lukens Jim Cavoretto Bill Markwart Dave Hoskins Bill Gordon Phil Lloyd Dick Swanson Larry Pearson
Tektronix 7904 500 MHz non-storage mainframe 1971 Val Garuts Thor Hallen John McCormick Les Larson Bill DeVey Bill Peek Hans Springer Joe Burger Joel Swanno Ken Hawken
Tektronix R7903 500 MHz non-storage mainframe 1974 Val Garuts Thor Hallen John McCormick Les Larson Bill DeVey Bill Peek Hans Springer Joe Burger Joel Swanno Ken Hawken


This patent describes the trapezoid-shaped line voltage selector found on many 1960s/1970s-era instruments, e.g. the 7503 and 7904.