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Load-Indicating attachment for drilling-rigs

Description: Patent for the invention is to provide a character to be attached on a mounted on the derrick of a drilling rig and which will accurately indicate the cooperative weight of the load attached to the back of rig.
Date: May 16, 1916
Creator: Hughes, Howard R.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Detachable Drill-Bit.

Description: Patent for a new invention in drill-bit machine which can be detached from two different sides and very flexible for use.
Date: May 23, 1916
Creator: Sly, Charles
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Extensible Neck-Yoke

Description: Patent for a neck yoke which may be lengthened or shortened and has novel means for securing the adjustable sections to prevent slipping, should the main fastening become loose.
Date: May 4, 1915
Creator: Waddell, Gasper Leon
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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