Improvements in Letters, Signs, and the like for Attachment to Glass or other Surfaces.
Year: 1892

page_text: Date of Application, 21st May, 1892
Complete Specification Left, 21st Feb., 1893-Accepted, 25th Mar., 1893
AL DE BOITIVATION.
Improvements in Letters, Signs, and the like for Attachment to
Glass or other Surfaces.
I EDMUND HOPWOOD, of 9 Station Road, Croydon, in the County of Surrey,
and 324 Upper Street, Islington, in the County of Middlesex, Carver, Gilder and
Picture Frame Maker, do hereby declare the nature of this invention to be as
follows:-
This invention has reference to the manufacture of letters, signs advertisements
or like articles from aluminium, or its alloys mainly composed of aluminium for
attachment to glass or like surfaces.
The aluminium is reduced by rolls and pressure to thin sheets of the metal, and
then by means of dies and pressure I forin the desired shapes of letters or other
articles and at the same time they are embossed or otherwise raised, sunk, or
shaped.
The surfaces wholly or in part are then burnished, or partly coloured.
A bevelled or other edge may be filed or formed on the article and this may be
treated by burnishing or lacquering or otherwise similarly treated to enhance the
ornamental effect.
In some cases design may be further obtained by removing by cutting,
stamping or filing away portions of the sheet of the letters or articles either before
shaping, or subsequently.
The aluminium letters or articles so treated and produced may be attached to the
glass or other surface by means of a suitable cement, modified according to the
character of the surface for attachment and I find, for glass, a cement mainly
composed of white lead and oil to answer well.
Dated the 21st dow of Mox 1800
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Letters, Signs, and the like for Attachment to
Glass or other Surfaces.
I EDMUND HOPWOOD, of 9 Station Road, Croydon, in the County of Surrey,
and 324 Upper Street, Islington in the County of Middlesex Carver, Gilder and
Picture Fraine Maker do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:-
This invention has reference to the manufacture of letters, signs advertisements
or like articles from aluminium, or its alloys mainly composed of aluminium for
attachment to glass or like surfaces serving as a support or background.
The aluminium is reduced by rolls and pressure to thin sheets of the metal, and
then by means of dies and pressure I form the desired shapes of letters or other
articles and at the same time they are embossed or otherwise raised, sunk, or
shaped.
The surfaces wholly, or in part are then burnished, polished or partly coloured.
A bevelled edge or edge of other contour may be filed, or otherwise formed on
the article and this may be treated by burnishing, polishing, or lacquering or
subjecting otherwise to similar treatment so as to enhance the ornamental effect of
the letter or device.

page_text: DESCRIPTION OF THE DRAWINGS.
Fig. 1 shews by face view a letter (S) and Fig. 2 a section of the same taken on
the line 1-1 of Fig. 1.
Fig. 3 shews a like figure of the same letter shewn by Figure 1 but with screw
or pin holes a formed therein for attachment to wood or other like support or
background.
Fig. 4 shews a front view and Fig. 5 a section of another form of the letter in
which the plane or level edge c of the concave letter forms the edge which abuts
on the inside of the glass and is secured thereto by a suitable cement and the letter
is seen through the glass.
This method of attachment requires no special flange or beading to be provided,
simply the edge or rim of the concave letter is trued to a plane surface to be flat
to the glass, a portion of which is represented by the lines A. Fig. 5 is a section
taken on the line 2-2 Fig. 4.
The arrow in Fig. 5 indicates the direction in which the observer is supposed to
be looking according to Fig. 4 from the outside.
In some cases designs may be further attained by removing by cutting, stamping
or filing away portions of the sheet of the letters or articles either before shaping
by the stamping or cutting from the sheet, or subsequently.
The aluminium letters or similar devices so treated and produced may be attached
to the surface of the glass or other surface by means of a suitable cement modified
as to its composition according to the character of surface to which it is to be
attached but I find that for attachment to glass a cement mainly composed of white
lead and oil will answer well and be very durable.
When it is desired to prepare the letters with cement filled into the concave
recess at the back for sale in that condition and so that the purchaser can by simply
applying heat effect attachment to the glass without technical aid I find "gutta
percha cement," "india rubber cement," "shell lac cement" or the like commercial
cements to answer well. For attachment of the edges of the aluminium letters,
around the concavities, b, to the surface of glass by means of cement so that the
concave sides of the letters are seen through the glass, the said edges are ground
or formed true and to a plane surface which is then attached by cement to the
inside of the glass sheet.
Letters and devices thus manufactured possess the quality of extreme lightness
small liability to tarnish by exposure and from their capability of receiving a high
polish on the one hand or a frosted silver appearance on the other hand great
variety of ornate effects may be attained.
The "frosted" effect may be attained by treatment with solution of caustic
potash followed by nitric acid solution or sulphuric acid solution, or a solution of
those acids admixed, followed by washing and suitable drying.
The screws, or pins, inserted into the holes a, a, a in the letters and into the
wood, or like backing may be of aluminium or a contrasting or different metal,
the former having the merit of invisibility and and non liability to tarnish.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
The manufacture of letters signs and the like devices for the purpose of
attachment to glass or other surfaces, from sheet aluminium or alloy of aluminium
and their application to glass or other surfaces for the purposes of advertising or
the like, all substantially as and for the purpose set forth.
01
1
T 1
1000
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.