AN IMPROVEMENT IN THE MANNER OF FASTENING METALLIC BACKS TO TRUSS PADS OF GLASS, PORCELAIN, OR OTHER ANALOGOUS SUBSTANCES
Year: 1857

page_text: LETTERS PATENT to Charles Christian Reinhardt, of the City of Baltimore
in the State of Maryland, United States of America, for the Invention
of "AN IMPROVEMENT IN THE MANNER OF FASTENING METALLIC BACKS TO
TRUSS PADS OF GLASS, PORCELAIN, OR OTHER ANALOGOUS SUBSTANCES."
Sealed the 23rd June 1857, and dated the 1st January 1857.
PROVISIONAL SPECIFICATION left by the said Charles Christian Reinhardt
at the Office of the Commissioners of Patents, with his Petition, on the
1st January 1857.
I, CHARLES CHRISTIAN REINHARDT, of the City of Baltimore, in the State
of Maryland, United States of America do hereby declare the nature of the
said Invention for "AN IMPROVEMENT IN THE MANNER OF FASTENING METALLIC
BACKS TO TRUSS PADS OF GLASS, PORCELAIN, OR OTHER ANALOGOUS SUBSTANCES," to
be as follows:-
The Invention refers to the manner of attaching glass or porcelain pads to
their metallic backs, and is designed to obviate defects existing in the ordinary
mode of securing the glass within a shallow brass cup. It consists in con-
structing the back with a flange extending around its edge, so as to slip within
the rim constituting the edge of the glass pad. This makes a strong
attachment, and prevents the metallic back from coming in contact with the.
skin of the. wearer..
said Invention for "AN IMPROVEMENT IN THE MANNER OF FASTENING METALLIC
BACKS TO TRUSS PADS OF GLASS, PORCELAIN, OR OTHER ANALOGOUS SUBSTANCES," to
be as follows:-
The Invention refers to the manner of attaching glass or porcelain pads to
their metallic backs, and is designed to obviate defects existing in the ordinary
mode of securing the glass within a shallow brass cup. It consists in con-
structing the back with a flange extending around its edge, so as to slip within
the rim constituting the edge of the glass pad. This makes a strong
attachment, and prevents the metallic back from coming in contact with the
skin of the wearer..

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Charles Christian Reinhardt in the Great Seal Patent Office
on the 1st July 1857.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
CHRISTIAN REINHARDT, of the City of Baltimore, in the State of Maryland,
United States of America, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the First day of January, in the year of our Lord One
thousand eight hundred and fifty-seven, in the twentieth year of Her reign, did,
for Herself, Her heirs and successors, give and grant unto me, the said Charles
Christian Reinhardt, Her special licence that I, the said Charles Christian
Reinhardt, my executors, administrators, and assigns, or such others as I, the
said Charles Christian Reinhardt, or my executors, administrators, and assigns,
should at any time agree with, and no others, from time to time and at all
times thereafter during the term therein expressed, should and lawfully might
nake, use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for "AN
IMPROVEMENT IN THE MANNER OF FASTENING METALLIC BACKS TO TRUSS PADS
OF GLASS, PORCELAIN, OR OTHER ANALOGOUS SUBSTANCES," upon the condition
(amongst others) that I, the said Charles Christian Reinhardt, or my executors
or administrators, by an instrument in writing under my, or their, or one of
their hands and seals, should particularly describe and ascertain the nature
of the said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said Charles Christian Reinhardt, do hereby
declare the nature of my said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement, reference being had to the accompanying Sheet of
Drawings, in which Figure 1 is a back view of the pad; Figure 2 is a section
on line a, a, of Figure 1; and Figure 3 is a representation of the ordinary
mode of attachment. Similar letters of reference denote the same part.
The Invention refers to the manner of attaching glass or porcelain pads
to their metallic backs, and is designed to obviate defects existing in the
ordinary mode of securing the glass within a shallow brass cup. It consists
in constructing the back with a flange extending around its edge, so as to
slip within the rim constituting the edge of the glass pad, whereby the back is

page_text: secured to the glass or porcelain, and with advantages bereafter to be set
forth.
In the Drawings, G represents the glass or porcelain, and B the metallic
portion of the pad, the former cast hollow, and so that its edge shall constitute
a rim for the reception of the flange f of the metallic piece B, as shown in
Figure 2.
The ordinary mode of attaching the glass or porcelain to the back is shown
in Figure 3, where a rim w of the glass is held in a shallow metallic cup.
This rim w was of necessity made shallow, as the increasing of its depth
would bring the metal too near the face of the pad, or if increased in direction
of the back, it would add too much to the thickness and weight of the pad.
The ill effect of this shallow rim is the splintering of the rim and consequent
loosening of the back by pressure. This I obviate by placing the flange f
within the deep and strong rim constituting the edge of the pad. Moreover,
with the cup attachment the sinking of the pad in the flesh of the wearer
brings the metal in contact with the skin, producing irritation and sores. With
the mode of attachment here claimed, it is impossible for the skin of the
wearer to come in contact with the metal.
Having now described my Invention and its advantages, what I claim
under the above in part recited Letters Patent is, the attachment of metallic
backs to the glass or porcelain faces of truss pads, by a flange around the edge
of the back, slipping within the rim constituting the edge of the glass or
porcelain face piece, substantially as and for the purposes specified.
In witness whereof, I, the said Charles Christian Reinhardt, have hercunto
set my hand and seal, this Thirteenth day of June, in the year of
our Lord One thousand eight hundred and fifty-seven.
CHARLES CHRISTIAN REINHARDT. (L.S.)