| US Patent: 288,589 
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| Swinging bridge for saw-arbors | 
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| Patentee: |  |
 | Donald J. Murray (exact or similar names) - Wausau, WI |  
 
 
 
 
 
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| Patent Dates: |  
| Applied: | Jul. 07, 1883 |  
| Granted: | Nov. 13, 1883 |  USPTO (New site tip)
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                        Jeff Joslin
 Vintage Machinery entry for D. J. Murray Mfg. Co.
 
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| Description: |  | This invention is a sort of arbor pillow-block mounting that can be quickly removed to change the blade. Modern saws use a stiff arbor that is unsupported on one end so the blade can be changed. |  |