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US Patent: 742,010
Spirit Level
George L. Davis - Watertown, Jefferson County, NY

USPTO Classifications:

Tool Categories:
layout tools : levels : metallic levels


Davis & Cook - Watertown, Jefferson County, NY

L. J. Davis
Omar A. Hine
Charles P. Wright, Jr.

Patent Dates:
Applied: Jul. 21, 1903
Granted: Oct. 20, 1903

Patent Pictures: [ 1 | 2 ]
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Martin J. Donnelly Antique Tools
Herbert E. Peck - patent attorney

This invention relates to certain improvements in levels, and more particularly to improvements in the class of "spirit-levels" comprising a bubble-tube mounted and adjustable in a suitable holder; and the objects and nature of my invention will be readily understood by those skilled in the art in the light of the following explanation of the construction illustrated in the accompanying drawings as an example of a construction within the spirit and scope of my invention. An object of the invention is to provide an axially-adjustable inner or bubble tube carrying ring or sleeve with improved and very effective means for turning or rocking said ring on its center or axis and locking the same in the necessary position to maintain the bubble-tube in the desired adjustment. Another object of the invention is to provide certain improvements in arrangements and constructions of parts and details) whereby a highly-efficient and advantageous spirit level is produced. The invention consists in certain novel features in construction and in combinations and arrangements of parts, as more fully and particularly pointed out and set forth hereinafter. Referring to the accompanying drawings,

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