Screw-Jack.
Description:
Patent for a simple, efficient, and economical lifting jack "which is particularly designed for removing and replacing the brasses in the journal boxes of freight, passenger and other railway cars, and which is so constructed that it can bear against the shoulder formed by the concave part of the car wheel in proximity to the tread and thus avoid the employment of special blocking for the jack, thereby enabling it to be quickly set and operated at any place without preparation of blocking as a …
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Date:
March 7, 1893
Creator:
Quinn, William
Item Type:
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Patent
Partner:
UNT Libraries Government Documents Department