| US Patent: 32,410 
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| Calipers | 
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| Patentee: |  |
 | J. H. Call (exact or similar names) - Springfield, MA |  
 
 
 
 
| Manufacturer: |  | Not known to have been produced |  
 
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| Patent Dates: |  
| Granted: | May 28, 1861 |  USPTO (New site tip)
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                        Ralph Brendler
 
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| Description: |  | This caliper uses a combination of a thumbscrew-set quadrant for fast
    setting, with a micrometer screw for fine adjustment. |  |