File:Electronics Research Laboratory plaque.jpg
Original file (3,072 × 2,304 pixels, file size: 2.54 MB, MIME type: image/jpeg)
Captions
This is a photo of a place or building that is listed on the California Historical Landmark listing in the United States. Its reference number is 836.
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Summary[edit]
DescriptionElectronics Research Laboratory plaque.jpg |
English: Photo of wikipedia:California Historical Landmark No. 836 |
Date | |
Source | Own work |
Author | self |
Camera location | 37° 26′ 29.48″ N, 122° 09′ 27.6″ W | View this and other nearby images on: OpenStreetMap | 37.441521; -122.157666 |
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Located at the eastern corner of Channing St. and Emerson Ave. in Palo Alto, California.
The landmark text, raised letters upon bronze embedded upon a frustum reads:
- (Bear of California)
- ★ ELECTRONICS ★
- RESEARCH LABORATORY
- ORIGINAL SITE OF THE LABORATORY AND FACTORY OF FED-
ERAL TELEGRAPH COMPANY, FOUNDED IN 1909 BY CYRIL F.
ELWELL. HERE, WITH TWO ASSISTANTS, DR. LEE DE FOREST, IN- - VENTOR OF THE THREE-ELEMENT RADIO VACUUM TUBE,
- DEVISED IN 1911-13 THE FIRST VACUUM TUBE AMPLIFIER
- AND OSCILLATOR. WORLD-WIDE DEVELOPMENTS BAS-
- ED ON THIS RESEARCH LED TO MODERN RADIO COM-
- MUNICATION, TELEVISION AND THE ELECTRONICS AGE.
- CALIFORNIA REGISTERED
- HISTORICAL LANDMARK NO. 836
- PLAQUE PLACED BY THE STATE DEPARTMENT OF PARKS
- AND RECREATION IN COOPERATION WITH THE CITY OF
- PALO ALTO AND THE PALO ALTO HISTORICAL ASSOCIATION.
- MAY 2, 1970
Licensing[edit]
Public domainPublic domainfalsefalse |
This work has been released into the public domain by its author, Ethics2med. This applies worldwide. In some countries this may not be legally possible; if so: |
Original upload log[edit]
date/time | username | resolution | size | edit summary | |
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07:21, 3 November 2008 | User:Ethics2med | <a href="http://upload.wikimedia.org/wikipedia/commons/4/41/CHL_836.jpg"><img alt="Thumbnail for version as of 07:21, 3 November 2008" src="http://upload.wikimedia.org/wikipedia/commons/thumb/4/41/CHL_836.jpg/120px-CHL_836.jpg" width="120" height="90" border="0" /></a> | 3,072×2,304 | 2.54 MB | {{Information |Description={{en|1=Photo of <a href="http://en.wikipedia.org/wiki/California_Historical_Landmark" class="extiw" title="wikipedia:California Historical Landmark">wikipedia:California Historical Landmark</a> No. 836}} |Source=self |Author=self |Date=Nov. 2, 2008 |Permission= |other_versions= }} lat=37.4430918 lon=-122.1574008 <!----> |
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:56, 28 November 2008 | 3,072 × 2,304 (2.54 MB) | BetacommandBot (talk | contribs) | move approved by: User:Deadstar This image was moved from Image:CHL 836.jpg == Summary == {{Information |Description={{en|1=Photo of wikipedia:California Historical Landmark No. 836}} |Source=self |Author=self |Date=Nov. 2, 2008 |Permission |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | Panasonic |
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Camera model | DMC-LZ7 |
Exposure time | 1/250 sec (0.004) |
F-number | f/2.8 |
ISO speed rating | 100 |
Date and time of data generation | 14:32, 2 November 2008 |
Lens focal length | 6.1 mm |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Ver.1.0 |
File change date and time | 14:32, 2 November 2008 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.21 |
Date and time of digitizing | 14:32, 2 November 2008 |
Meaning of each component |
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Image compression mode | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 3 APEX (f/2.83) |
Metering mode | Pattern |
Light source | Tungsten (incandescent light) |
Flash | Flash did not fire, auto mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Manual white balance |
Digital zoom ratio | 0 |
Focal length in 35 mm film | 37 mm |
Scene capture type | Standard |
Scene control | None |
Contrast | Normal |
Saturation | Normal |
Sharpness | Normal |