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Break-Out Pin.

Description: Patent for a modified break-out pin on an oil derrick which makes it easier to release a wrench for unscrewing pipes when done, but still holds the wrench in place while in use.
Date: October 21, 1919
Creator: Headrick, James O.
Item Type: Refine your search to only Patent

Bale Forming Press.

Description: Patent for a bale forming press to form bales of hay and automatically secure "baling wires around the bale as formed" (lines 13-14). It automatically stops the feeder when "the bale is being tied" (lines 19-20) and winds and automatically unwinds and winds the wire.
Date: February 26, 1918
Creator: Dudley, Andrew T.
Item Type: Refine your search to only Patent

Aerial Projectile

Description: Patent for an aerial projectile for use as an anti-infantry bomb, dropped by planes. Specifically, it is a fragmentation bomb hand dropped from planes that will not only deliver an explosive blast and the subsequent shrapnel, but deliver such a blast as to destroy itself so it cannot be reverse engineered.
Date: September 25, 1918
Creator: Bury, Thomas J. & Bury, Oney
Item Type: Refine your search to only Patent

Core-Barrel.

Description: Patent for a core barrel for use in rotary drilling of oil or water wells, that will allow for easy extraction of the upwardly extending column of material.
Date: October 14, 1919
Creator: Humason, Granville A. & Childs, William L.
Item Type: Refine your search to only Patent
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