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“Bite-Size Bits of Local, National, and Global History”
“Bite-Size Bits of Local, National, and Global History”
San Jose in Santa Clara County, California — The American West (Pacific Coastal)
 

Mine Ventilation Fans

 
 
Mine Ventilation Fans Marker image. Click for full size.
By Barry Swackhamer, February 15, 2012
1. Mine Ventilation Fans Marker
Inscription. Ventilation fans provided fresh air for miners deep within the mines. Ventilation pipe connected to fans carried air wherever it was needed in the mine to provide miners with breathable air by diluting and displacing dust and noxious gases. Fans were designed to run continuously with little or no maintenance. Fans were normally mounted on platforms well clear of the mine entrance and far away from equipment traffic so as to provide the cleanest and coolest air possible.

Examples shown here are centrifugal fans, also known as radial fans. The rotation of an impeller, located within the casing, causes air to travel through it in a radial direction, developing air pressure as it does so. These two examples are rather simple in design, as they do not provide for speed or air volume control. Electricity to power the ventilation fans was a major cost factor, accounting for as much as one-third of the electrical power for a typical underground mine.

These fans were used in the Guadalupe mine from the 1940s until the mine closed in the 1970s. The Guadalupe Rubbish Company donated the fans to NAQCPA in 1987.
Louis Allis Centrifugal Fan (on the left)
Manufacturer: The Louis Allis Co., Milwaukee, WI
Power: 220/440V, 3 [ohms], 60 Hz, 26.4/13.2A, 10 HO
Output: 100 CFM @ 40 PSI
Joy
Mine Ventilation Fans Marker image. Click for full size.
By Barry Swackhamer, February 15, 2012
2. Mine Ventilation Fans Marker
Centrifugal Fan (on the right)
Manufacturer: Joy Manufacturing Co., New Philadelphia, Ohio
Power 220/440V, 3 [ohms], 60 Hz, 63/31.5 A, 25 HP
Output: 200 CFM @ 41 PSI

 
Erected by The California State Society, Daughters of the American Revolution and New Almaden Quicksilver County Park Association.
 
Marker series. This marker is included in the Daughters of the American Revolution marker series.
 
Location. 37° 10.394′ N, 121° 49.583′ W. Marker is in San Jose, California, in Santa Clara County. Marker can be reached from Almaden Road. Touch for map. The Hacienda Mining Display is a short walk on the Deep Gulch Trail from the Almaden Quicksilver County Park parking lot. Marker is in this post office area: San Jose CA 95120, United States of America.
 
Other nearby markers. At least 8 other markers are within walking distance of this marker. Mancha “Little Trammer” Battery Locomotive (here, next to this marker); Mine Air Compressors (here, next to this marker); Skip Loader (a few steps from this marker); Gould Rotary Furnace and Condensing System (a few steps from this marker); D Retort and Condensing System (a few steps
Mine Ventilation Fans image. Click for full size.
By Barry Swackhamer, February 15, 2012
3. Mine Ventilation Fans
from this marker); Shaker-Concentrator (a few steps from this marker); Mercury Storage Vault (a few steps from this marker); Hoeing Table and Cleaning Tank (within shouting distance of this marker). Touch for a list and map of all markers in San Jose.
 
More about this marker. The Hacienda Mining Display is still under development.
 
Additional keywords. machinery
 
Categories. Industry & Commerce
 
 
Credits. This page was last revised on June 16, 2016. This page originally submitted on February 19, 2012, by Barry Swackhamer of San Jose, California. This page has been viewed 454 times since then and 23 times this year. Photos:   1, 2, 3. submitted on February 19, 2012, by Barry Swackhamer of San Jose, California. • Syd Whittle was the editor who published this page.
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