US Patent: 75,534 - Improvement in Adjustable Spirit Levels


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US Patent: 75,534

Improvement in Adjustable Spirit Levels

Patentee:

Leonard L. Davis (exact or similar names) - Springfield, MA

USPTO Classifications:

33/385

Tool Categories:

layout tools : levels

Assignees:

None

Manufacturer:

L. L. Davis Co. - Springfield, MA

Witnesses:

J. P. Buckland

N. B. Smith

Patent Dates:
Granted:	Mar. 17, 1868

Patent Pictures:

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Vintage Machinery entry for Leonard L. Davis

Description:

Adjustable spirit level utilizing metallic elastic adjusting-ears and screws to adjust the spirit level after construction. Davis acknowledges Hosmer's patent, 39,906 of 11 Nov 1862 and others as other prior adjustable patents for levels.