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Mechanical Television

Items from Charles Jenkins

From David Sproul

My wife, Robin Vierbuchen Sproul, inherited many miscellaneous items once belonging to extraordinary inventor and visionary Charles Francis Jenkins. Robin grew up in this Washington, DC area and I've lived here ever since we married in 1982. I spent my whole adult working life on the engineering staff at WMAL, the final 15 years or so as chief engineer. Robin was the ABC News Washington Bureau Chief for 21 years. Jenkins was her great uncle. We've especially enjoyed defending the Jenkins legacy over the years, since he lived nearby on 16th Street NW, had his corporate office downtown on Connecticut Avenue NW and his experimental transmitter site was over in Wheaton, Maryland. The transmitter house still stands, protected for its historic significance. The items coming your way are two clumps of documents. The smaller one is a tattered binder with an assortment of loose documents. The larger, sturdier notebook appears to be the Jenkins scrapbook where he taped all manner of things he found interesting.

Jenkins' scrapbook - articles he clipped and pasted in his scrapbook

Loose Items

Antenna Patterns

Brochures Acheson Opaque Bethlehem Torque Amplifier Burgess Resonance Indicator To make text larger in single column tables. To make text larger in single column tables. To make text larger in single column tables

 

Correspondence Kotterman to Jenkins - 7/29/1921 Jenkins to D. McFarland Moore - 8/24/1925 Schnell to Jenkins - 9/10/1926 Navy Department to Jenkins - 12/1/1927 RCA to Science Service - 8/10/1928 RCA to Goldsmith - 8/30/1928 General Electric to Jenkins - 1/16/1929 Jenkins to General Electric - 1/22/1929 Fox Film Corp. to Jenkins - 8/14/1931 SMPE to Jenkins - 8/19/1931 Herbert Hoover to Jenkins - 8/22/1931 Jenkins to Davis - 9/26/1933 Davis to Jenkins - 5/2/78 National Air Transport, Inc. stationery To make text larger in single column tables. To make text larger in single column tables. To make text larger in single column tables

Diagrams

201 amplifier - 1924 5 meter receiver - 1924 5 meter transmitter - 1924 Tuning fork motor control - 1925 Control unit, weather map receiver - 1927 Long arm relay - 1927 Scanning drum - 1928 Arc lamp 7 to 12 meter oscillator Fig i & Fig ii Lens Miscellaneous To make text larger in single column tables. To make text larger in single column tables. To make text larger in single column tables

Newspaper Articles

 

Patents Jenkins visual radio patents Analysis of patents Electrical transmission of pictures patents Appariel destine a transmittre a distane les objects - 1908 Nipkow patent - 1884 An Improved Method of and Apparatus for Determining the Speed of an airplane - 1913 Improvements in or Related to the Instantanous Electrical Control of a Beam of Light - 1926 Patent # 5611 -1914 Patent #174606 Patent #194437 Patent #230576 Patent #332270 Patent #361078 Patent #390435 Patent #486528 To make text larger in single column tables. To make text larger in single column tables. To make text larger in single column tables

Prismatic Rings

Stereo, Colors

 

Technical Articles A New Interferential Dilatometer - 1920 RCA picture synchronization - 1927 A Method of Obtaining Light Flashes - 1926 A Sensitive Vacuum Tube Relay - 1926 Instructions for Dry Etching of Glass - 1924 Instructions for Silvering Glass Surfaces Our Present System of Amplifiers Producing A Square Wave of Radio Frequency The Grid Glow Tube - 1927 Etching Ink for Glass Etching a Prismatic Plate Formula for Etching Designs and Letters on Incandescent Lamp Bulbs Ink - 1926 Ink for Writing on Cellulose Nipkow and Sutton Weather Map To make text larger in single column tables. To make text larger in single column tables. To make text larger in single column tables

Miscellaneous

Motion picture projector Spectrum chart Electronics Chart of the Sound Picture Industry Women watching mechanical TV Jenkins studio Miscellaneous To make text larger in single column tables. To make text larger in single column tables. To make text larger in single column tables

 

 

Early Television Museum

5396 Franklin St., Hilliard, OH 43026

(614) 771-0510