Patent Model - Improvement in Ratchet-Drills
Maker and role
William Frankel, Patentee
Production date
May 09 1871
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Object detail
Media/Materials
Steel, brass, wood
Measurements
5 1/2 x 5 x 1" (14 x 12.7 x 2.5cm)
Description
Frankel's invention "relates to that class of ratchet-drills used by hand for drilling in places where machinery cannot be applied, such as boilers, iron-building fronts, &c." (Patent Number 114,545)
Collection
Object number
2015.14.1298a,b
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