An Improved Transparent Case for Protecting Maps and Plans.
Year: 1894

page_text: Date of Application, 11th Oct., 1894-Accepted, 17th Nov., 1894
COMPLETE
SPECIFICATION.
An Improved Transparent Case for Protecting Maps and Plans.
I, WALTER BRIERLEY, of Penny Bank Chambers, Halifax, in the County of
York, Patent Agent, do hereby declare the nature this invention, which has been
communicated to me by the Firm of Bial, Freund and Co., of Breslau, in the
Empire of Germany, Booksellers, 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 :-
Everybody knows of how great a value maps are for the military, for tourists,
cyclists, and those ascending mountains, but whoever used such maps will also
have experienced that they are very soon worn out through carrying them in
pockets, or in one's knapsack etc. and that their edges are bent or torn, moreover
maps very soon become soiled, and illegible on account of dust and rain as well as
through contact with wet hands, so that maps or plans used for out door reference soon
lose their value. Now although protectors of the maps are made, these also have
their inconveniences, as while using the maps they must be taken out of the case
each time, and spread, and refolded, whereby. creases are soon formed, moreover
such covers as used hitherto were not durable.
Such being the nature and object of my said invention the following is a
complete description of same reference being had to the accompanying drawings
in which ·
Fig. 1. is an elevation of the improved case.
Fig. 2. is a plan view of Fig. 1.
This invention consists of a protecting case possessed of the necessary capacity
of resistance, and with it offering the chief advantage that the map is not to be
removed from its containing case, the material of the latter being completely
transparent, affording immediate inspection and reference.
The substance employed in the manufacture of said cases consists of transparent
celluloid, or vulcanite from which either common covers or cases closed on three
sides are made. For this purpose a sheet of celluloid to be wrought is stretched
into a holdfast, so that there remains prominent only a small margin, which latter
for admitting of being bent round, is immersed in hot water. The margins to be
connected are now spread over with a connecting means which consists of
transparent celluloid dissolved in wood spirit, or pyroacetic spirit and con-
glutinated. The inside of the case is marked by divisonal squares representing
miles or distances corresponding to the scale of the map, the division lines being
scratched on the inside of the case before, and rubbed over with red, or blue
colour so as to render the squares distinct from the outside, so that it is possible to
immediately count out distances ad libitum in miles, or kilometers. The celluloid
map protecting cover above described is not influenced by rain, or snow, and can
very easily be washed and cleaned; on account of its transparency it affords the
advantage of one's being able to use the map without being obliged to take it out
of its protecting case.
The cases may be made single, but I prefer to make them double as shewn in
the drawing, and hinged at a, and having a locking device such as b; at c are
shewn the divisional lines.
Having now particularly described and ascertained the nature of my said inven-
tion I declare that what I claim is :—
A transparent case for protecting maps and plans, made of celluloid or similar
material so that the map or plan may be used or referred to without removal

page_text: from its case, the latter having divisional squares corresponding with the scale of
the map, for counting out the miles, kilometers, or distances respectively, as such
case is berein fully described and illustrated.
Dated this 10th day of October 1894.
WALTER BRIERLEY,
Penny Bank Chambers, Halifax, Applicant.