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US Patent: 274,135
Drill-Chuck
A single coaxial spring uges the jaws apart to receive the bit.
Patentee:
Charles Morrill (exact or similar names) - New York, NY

USPTO Classifications:
279/36, 279/69

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Jnod? Gavin
Charles M. Higgins
Edward H. Wales
Patent Dates:
Applied: Jul. 06, 1880
Granted: Mar. 20, 1883

Patent Pictures:
All patent images are condensed here.
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Description:
The chuck body is relieved for the guiding pin inserted in each jaw

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