Category:Kellogg Switchboard & Supply Company

Subcategories

This category has only the following subcategory.

Media in category "Kellogg Switchboard & Supply Company"

The following 21 files are in this category, out of 21 total.

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  111-SC-41727 - NARA - 55242669.jpg 8,525 × 5,832; 17.13 MB
  
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  111-SC-41728 - NARA - 55242671.jpg 8,525 × 5,832; 17.66 MB
  
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  111-SC-41729 - NARA - 55242673.jpg 8,525 × 5,832; 17.23 MB
  
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  111-SC-41744 - NARA - 55242703.jpg 8,525 × 5,832; 17.61 MB
  
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  Close up view of switchboard panel operator's station -1; panel contains 1200 push-pull button switches which control poer to red, green, and white indicating lights on the HAER PA,51-PHILA,712-11.tif 5,000 × 3,956; 18.87 MB
  
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  Close-up view of leeds and northrup strip chart recorders used to indicate power usage on certain portions of the system. Note model board builders plaque which reads Kellogg HAER PA,51-PHILA,712B-11.tif 5,000 × 4,001; 19.08 MB
  
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  Kellog Switchboard & Supply Co., Chicago, USA - Telephone Museum - Waltham, Massachusetts - DSC08158.jpg 3,342 × 4,645; 5.04 MB
  
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  Kellogg Switchboard & Supply Company logo ca1907.jpg 700 × 700; 228 KB
  
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  Microfono a carbone Kellogg - Museo scienza tecnologia Milano 08283 01.jpg 1,280 × 853; 71 KB
  
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  Microfono a carbone Kellogg - Museo scienza tecnologia Milano 08283 02.jpg 1,280 × 853; 60 KB
  
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  Microfono a carbone Kellogg - Museo scienza tecnologia Milano 08283.jpg 1,280 × 853; 58 KB
  
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  Telefono a chiamata magnetica a batteria locale (BL), da campo - Museo scienza tecnologia Milano 02174 dia.jpg 1,280 × 818; 74 KB
  
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  View north of model board; operator's console -1 is in the left foreground of the photograph- communications module at center foreground - Thirtieth Street Station, Power HAER PA,51-PHILA,712-4.tif 5,000 × 4,007; 19.11 MB
  
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  View northeast of model board representing northern portion of trackage monitored by the Philadelphia poer directors center; free-standing cabinet at far right center of HAER PA,51-PHILA,712-1.tif 5,000 × 4,056; 19.34 MB
  
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  View northeast of telephone console; operator's station -1 - Thirtieth Street Station, Power Director Center, Thirtieth and Market Streets in Amtrak Railroad Station, HAER PA,51-PHILA,712-15.tif 5,000 × 4,077; 19.44 MB
  
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  View northwest of model board and operator's station -1 - Thirtieth Street Station, Power Director Center, Thirtieth and Market Streets in Amtrak Railroad Station, Philadelphia, HAER PA,51-PHILA,712-3.tif 5,000 × 4,090; 19.51 MB
  
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  View northwest of model board; telephone communications with interlock towers and substations was maintained using the switchboard at the photograph's lower left of center; HAER PA,51-PHILA,712-2.tif 5,000 × 4,071; 19.41 MB
  
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  View northwest of power directors board; hole at center formerly held a clock - Thirtieth Street Station, Power Director Center, Thirtieth and Market Streets in Amtrak Railroad HAER PA,51-PHILA,712-10.tif 5,000 × 4,080; 19.46 MB
  
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  View southwest of carousel displaying schematic diagrams of electrical system; carousel has been rotated 180 degrees to show schematics on opposite side; operators console HAER PA,51-PHILA,712-14.tif 5,000 × 4,055; 19.34 MB
  
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  View southwest of carousel displaying schematic diagrams of electrical system; operators console switchboard -1 is at lower right of photograph - Thirtieth Street Station, HAER PA,51-PHILA,712-13.tif 5,000 × 4,038; 19.26 MB
  
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  View southwest of model board and operator's station -2; cabinet in foreground houses at supervisory board and control switches for circuit breakers - Thirtieth Street Station, HAER PA,51-PHILA,712-6.tif 5,000 × 4,031; 19.22 MB