https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=85290&pn=2,741,847 Micrometer Gauge Having Means to Prevent Lost Motion Patentee: Albert G. Hagstrom - Newington, Hartford County CT Granted:1956-04-17

This patent was an improvement on patent #2,267,332. Abstract: The general object of the invention is to provide a micrometer gauge of the type stated having means for preventing lost motion at the motion multiplying lever, either in the gauge as first manufactured or after long use and possible wear of parts. Claim: In a micrometer gauge having a rotatable spindle and having first and second concentric sleeves partly surrounding the spindle and rotatable relatively thereto which second sleeve partly surrounds the first sleeve and has an outer end wall, a flange on the outer end of the first sleeve and provided with a notch and with a yieldable resilient portion at one edge of said notch, a transversely extending lever pivoted near one end to the spindle for movement about a longitudinal axis and serving to transmit rotation to a Limited extent from the second sleeve to the first sleeve :with the second sleeve rotating at a greater rate, said lever including a finger at the last said end thereof entered in the notch in said flange and having a width slightly greater than the initial width of the notch so that the resilient flange portion always applies pressure to the finger to prevent lost motion at type finger during pivotal movement of the lever and during relative rotation of the sleeves and said lever also including resilient bifurcations which define a lengthwise slot therein near the opposite end thereof, and a longitudinal pin on the end wall of the second sleeve entered in the slot in the lever and having a diameter slightly greater than the initial width of the slot so that the said resilient bifurcations always apply pressure to the pin to prevent lost motion at the pin during pivotal movement of the lever and during relative rotation of the sleeves.
This is one of 84,587 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=27846&pn=2,267,332 Direct Reading Positive Measuring Micrometer Gauge Patentee: Albert G. Hagstrom - West Hartford CT Granted:1941-12-23
Manufactured by L. S. Starrett Co. - Athol, Worcester County MA

This patent was improved by patent #2,741,847. This patent was used on the No. 221 Starrett micrometer. Abstract: My invention relates to that class of instruments for effecting delicate and accurate measurements, particularly as to depth and length or other dimensions of an article, and an object of the invention, among others, is the production of an instrument of the type herein mentioned, by means of which measurements to an extremely fine degree may be attained in a most accurate and expeditious manner. Claim: A micrometer gauge comprising a frame and including a threaded spindle, an anvil in cooperative relation with the spindle, a barrel in which the spindle is contained, a plurality of measuring sleeves rotatably mounted upon the barrel and upon one another, a connection between said sleeves for multiplying the rate of rotation of one relatively to another, a yielding connection between one of said sleeves and said spindle for operation of the latter, and means on said barrel and sleeves for denoting the amount of movement of said sleeves.
This is one of 84,587 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85286&pn=669,570 Wrench Patentee: Abner K. Wolfe - Kansas City KS Granted:1901-03-12
Assigned to George H. Lindley - Denver CO

Quick adjust mechanism where a cam lever fulcrumed in a slot in the toothed shank operates a gripping piece within the movable jaw.
This is one of 84,587 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=24893&pn=2,361,607 Plier Wrench Patentee: Charles D. Daniels - Mountainair NM Granted:1944-10-31
Manufactured by POWERGRIP WRENCH Co. - Shawnee OK

Lifting the swinging handle frees the jaws to slide in relation to each other. Gear teeth on the lever handle tighten the grip. Produced as the Power Grip, at Mountainair, New Mexico. Known examples are marked "Patent Pending" or "PAT'D." One KNOWN example marked "POWERGRIP WRENCH CO. / SHAWNEE OKLA" reflects a company founded in 1935, and may reflect an earlier stage in evolution of the tool. Examples shown in picture no. 709 in "Antique and Unusual Wrenches," by Schulzes show handle variations matching other examples marked "Pat Pend."
This is one of 84,587 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85285&pn=3,395,421 Lobster and crab claw shell cracking tool Patentee: Charles L. Harless Jr. - San Angelo TX Granted:1968-08-06

Pliers type tool with curved jaws and blades with curved, "serrated" blades. The basic tool evolved from the "YORK TEXAN SHELLER" -- patent no. 2,651,342. Patent no. 2,654,120 is also cited as "reference."
This is one of 84,587 patents currently in the database at datamp.org

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