Stillson Picture

Llave tubo Española. Llave Stillson Americana.

Llave de tubo española

Llave Stillson americana

Solicitud Patente Llave Stillson

Stillson Americana

Today in Science History: "UNITED

STATES PATENT OFFICE.


DANIEL C. STILLSON, OF SOMERVILLE, MASSACHUSETTS. IMPROVEMENT IN WRENCHES

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Stillson Española Stillson Americana

Spanish Type & Stillson Type
Specification forming part of Letters Patent No. 184,993, dated December 5, 1876; application filed
July 10, 1876.





To all whom it may concern:

Be it known that I, DANIEL C. STILLSON, of Somerville, in the county of Middlesex and State of Massachusetts, have invented new and useful Improvement in Wrenches;

and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying diagram, and to the letters of reference marked thereon, which form a part of this specification.



In the said drawing, A denotes a tapering metallic bar, having a movable jaw, B, formed on one end thereof, such jaw being provided with a series of teeth an its inner face. The bar A (or the part thereof constituting the shank of' the movable jaw) extends partially through a hollow bar, C, and through a rosette or nut, D, disposed in a chamber, c, in the said bar, and also through an elongated hole made in the transverse bar b, forming one of the walls of the chamber, and into a hollow space formed in the outer end of the bar C, such bar A having a male screw, d, cut on its inner end, as shown in the drawing, such outer end constituting a handle to the wrench. E is the stationary jaw, which is formed on the inner end of the bar C. Each of the jaws B and E is made to have a slight outward inclination to each other. The stationary jaw I prefer to make with a dovetail serrated block, f, which is to be affixed in the face of the stationary jaw, as shown in the drawing.
Within the stationary jaw, and at right angles to its shank, is a hollow chamber, g, in which is inserted a coiled spring, e, the outer end of which bears against the shank of the movable jaw. The chamber, in the bar C, to receive the shank of the sliding jaw, is formed (preferably) tapering, and of width, in the direction of the jaws, somewhat greater than the width of the shank, and at the end adjacent to the shank about one-third greater, such being to allow of the necessary backward action of the jaws while in the act of grasping and turning a pipe or cylinder.





Having described my invention, what I claim is —
The improved screw and pipe wrench, as described, the same consisting of the bar A, provided with the movable jaw B and male screw d, and the hollow bar C, provided with a fixed jaw, E, having a spring-chamber, g, and spring e disposed therein, as shown, the rosette or actuating nut D arranged within a chamber in the bar C, and, operating with the male screw d, the whole being constructed and arranged for conjoint operation, substantially as shown and described.

In testimony that I claim the foregoing as my own invention I affix my signature in presence of two witnesses.

DANIEL C. STILLSON.

Witnesses:. F. P. HALE, F. C. HALE.

Dibujo Patente Original. Llave Stillson

Full Size Picture Pipe wrench patent.JPG

Llave Stillson "O bien sueltas el tubo o rompe la llave"

Llave Stillson



History of Wrenches: "Pipe Wrench

On September 13, 1870, a patent was granted to Daniel C. Stillson, a steamboat fireman, for a 'wrench'.

Stillson invented the pipe wrench - sometimes called the Stillson pipe wrench. Stillson, suggested to the heating and piping firm Walworth manufacture a design for a wrench that could be used for screwing pipes together. Previously, serrated blacksmith tongs had been used for that purpose. The owner, James Walworth told Stillson to make a prototype and "either twist off the pipe or break the wrench."

Stillson's prototype twisted the pipe successfully. His design was then patented and Walworth manufactured the wrench. Stillson was paid about $80,000 in royalties during his lifetime. "

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