| US Patent: 879,847 
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| Safety controlling mechanism | 
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| Patentee: |  |
 | Thaddeus R. Bell (exact or similar names) - Westfield, NJ |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Applied: | Apr. 11, 1907 |  
| Granted: | Feb. 25, 1908 |  USPTO (New site tip)
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                        Jeff Joslin
 Vintage Machinery entry for Bell Electric Motor Co.
 
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| Description: |  | This safety device is for locomotive engines and street cars, and it automatically reduces speed when going around a curve. The idea would seem to be of limited usefulness because it can only engage once the axles begin to turn. |  |