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OF THE

FRANKLIN INSTITUTE

OF THE

State of Pennsylvania

AND

MECE ANIOS' REGISTER.

DEVOTED TO

MECHANICAL AND PHYSICAL SCIENCE,

CIVIL ENGINEERING, THE ARTS AND MANUFACTURES,

AND THE RECORDING OF

AMERICAN AND OTHER PATENTED INVENTIONS.

EDITED

BY THOMAS P. JONES, M. D.

XINBEB OF THE AMERICAN PHILOSOPHICAL SOCIETY, OF THE ACADEMY OF NAT.

URAL SCIENCES, PHILADELPHIA, THE AMERICAN ACADEMY OF ARTS
AND SCIENCES, MASSACHUSETTS, AND CORRESPONDING MEM-

BER OF THE POLYTECHNIC SOCIETY OF PARIS.

NEW SERIES

Vol. XIX

PHILADELPHIA:
PUBLISHED BY THE FR LIN INSTITUTE, AT THEIR HALL,

KENNEDY & ELLIOTT, WASHINGTON CITY; E. I. COALE & CO.
BALTIMORE; G. & C. CARVILL & CO., NEW YORK; AND

JOSEPH H. FRANCIS, BOSTON.

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OF THE

FRANKLIN INSTITUTE

OF THE

State of Pennsylvania,

AND

MECHANICS' REGISTER.

DEVOTED TO

Mechanical and Physical Science,

CIVIL ENGINEERING, THE ARTS AND MANUFACTURES,

AND THE RECORDING OF

AMERICAN AND OTHER PATENTED INVENTIONS.

JANUARY, 1837.

Practical and Theoretical Mechanics and Chemistry.

Description of Presses for cutting out Blanks, or Planchels, for Coin, made for the Branch Mints at Charlotte and Dahlohnega, from designs by, and under the direction of, FRANKLIN PEale, of the Mint of the United States.

It is always desirable in the construction of machines, that there should be no redundancy of parts, and that they be made as simple as is consistent with efficiency of operation. It is also equally desirable to distribute the requisite parts in as symmetrical a form as the object of their construction will permit, not forgetting that the laws of good taste are as applicable to machinery as to architecture, or to any other form in which inorganic matter may be presented to the eye. It was under the influence of these sentiments that the machine which is the subject of this notice was designed.

The preparatory operations of coining are briefly stated for the information of the general reader. The ingots of standard metal, after being rolled to the desired thickness, nearly, are taken to the draw-bench, and by its operation are equalized in thickness throughout. They then pass to the culling-out press, a few pieces are cut from the end of each slip, (the rolled and drawn ingot thus called,) and weighed, to test their accuracy, and if satisfactory in this respect, the whole slip is passed under the operation of the cutting-out press, the operator being' assured that the several pieces cut out of the slip are of the same weight, or so nearly approximated to it, as to be within the allowance for error of workmanship provided by the Mint law. Vol. XIX-No, 1.- JANUARY, 1837.

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