Patent Model - Improvement in Collapsible Cores for Casting

Maker and role
George Bisset Jr. (Canadian), Patentee
George Bisset Jr. (Canadian), Assignee
William Knight (Canadian), Assignee
Production date
Jan 15 1878
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Object detail

Brass, iron
12 x 4 1/2" (30.5 x 11.4cm)
Bisset's patent furnishes "an improved core-barrel for use in casting water, gas, and other pipes rapidly, effectively, and economically; which will reduce the quantity of loam required to form the core to about one-third of the quantity heretofore necessary; which will avoid the use of hay, straw, or other intervening wrapper; which will greatly shorten the time required for the core to dry ready for use, and which will remove any liability of the core to burst..." (Patent Number 199,179)
Object number
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