https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=85819&pn=2,016,483 Housing and brake for steel rules Patentee: Frederick O. Carlson - New Yorkny Granted:1935-10-08
Manufactured by Master Rule Mfg. Co. - New York NY
Assigned to Master Rule Mfg. Co. - New York NY

Case design and friction "lock" for steel tape measure. Appears in ca. 1940 ads as Master Rule Co. "Streamline" with "lever lock."
This is one of 85,109 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85817&pn=2,076,704 Steel rule Patentee: Frederick O. Carlson - New York NY Granted:1937-04-13
Manufactured by Master Rule Mfg. Co. - New York NY
Assigned to Master Rule Mfg. Co. - New York NY

Tape and case design to facilitate inside measurement, etc. Case dimension + hook thickness are factored into the markings to provide accurate readings. [In the illustration, the case + "hook" = 2 inches] The design was marketed by Master Rule Mfg. as "TUFBOY" in 1940. The patent number appears on relevant examples.
This is one of 85,109 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=41809&pn=883,642 Spirit Level Patentee: Albert W. Hight - Ballard, King County WA Granted:1908-03-31
Assigned to Hugh G. Monen - Toledo, Lucas County OH

Robert B. Wilson - patent attorney Abstract: My invention relates to a spirit level, and has for its object to provide a convenient instrument of the kind, that is of simple and inexpensive construction and wherein the bubble glass is readily adjustable to accurately locate the plane of the bubble between indicating lines of the glass and parallel with planes of the body of the instrument, whereby whenever the plane of the bubble is located between the indicating lines, the planes of the body that are parallel therewith are also horizontal. A further object is to provide an instrument of the kind having one or more bubble tubes that may be readily and accurately adjusted therein to adapt the instrument for convenient and accurate use for either leveling or plumbing or both combined. Claim: In a level, the combination with a body having a plane base, and a counterbored transverse orifice parallel to the plane base, of a ring rotatably mounted in the orifice, arched bubble sight tube secured diametrically of the ring, annular plates in the counterbores, and clamping screws extending through the annular plates and the hoc adapted to press the plates oppositely on t body and the ring.
This is one of 85,109 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85816&pn=883,212 Spirit Level Patentee: George W. Lingle - Chicago, Cook County IL Granted:1908-03-31

Clarence W Taylor - patent attorney. There is some confusion with US-883,642, another level issued the same day. Abstract: This invention relates to new and useful improvements in spirit levels, and has for its objects, first, to provide a liquid measuring instrument adapted to maintain the upper surface of the liquid in more than one plane at the time of reading; second, to facilitate a condition of rest of the upper surface of the liquid and increase the promptitude of the instrument in furnishing indications of the variations, if any, from the true level or the plumb line; third, to produce a one-glass, reversible spirit level to obviate thought or care which edge or end should be used on the work; and, forth, to provide one or more fixed reading bars in the liquid chamber. Claim: A spirit level comprising a ring and side plates arranged to constitute a liquid container, a liquid, and means extending to near the center of the container and cooperating with a transparent side thereof for holding' the upper surface of the liquid in more than one plane at the time of reading.
This is one of 85,109 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85815&pn=1,474,798 Wrench or Tool Patentee: Ludwig Stark - Chicago IL Granted:1923-11-20
Assigned to "FLEXO" Wrench and Tool Co. - Chicago IL

Reversible ratchet socket connected to a handle by a "universal joint."
This is one of 85,109 patents currently in the database at datamp.org

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