Improvements in Map Cases.
Year: 1890

page_text: COMPLETE SPECIFICATION.
Improvements in Map Cases.
I, ISAAC WATTS HENDERSON, residing at 652 West Adams Street, in the City of
Chicago, in the County of Cook and State of Illinois, United States of America,
Book Binder and Map Mounter, do hereby declare the nature of my invention, for
"IMPROVEMENTS IN MAP CASES," 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 drawings, in which :-
Figure 1 is a longitudinal section.
Figure 2 is a detail showing one end of the body of the case in section, with the end
piece removed therefrom.
Figure 3 is a cross section at line 3 of Figure 1.
Figure 4 is a detail, being a perspective of the hinge which connects one end piece
with the body of the case.
Figure 5 shows a modification.
In the drawing the case is not shown in the position which it occupies when hung
against the wall, but in the position in which it might very naturally be placed when
inserting or removing a map.
My invention relates to that class of map cases in which the case is designed to
receive a single map and consists in a novel construction of the body of the case which
is made of wood; and in a hinged end piece, all as illustrated in the drawings and as
hereinafter described.
That which I claim as new will be pointed out in the claims.
In the drawings,
A represents the body of the map case which, except in Figure 5, is composed of
two pieces of wood, B, C, each piece being provided with a groove a, the two pieces
being held together by means of a gib and by glue or cement applied to the gib and the
adjoining ends of the two pieces B, C.
The wall of the interior of the case which receives the map is on a circle and the
exterior is also on a circle; but these two circles are struck from two different centres
to place the interior and exterior surfaces eccentric to each other so that the adjoining
ends which receive the gib are of increased thickness and hence are inade to possess
suitable strength and the requisite body for the grooves and gib, while the edges of the
front opening or map-slot are comparatively thin whereby the map can be more
readily drawn out and replaced than if the map case sections were made of uniform
thickness. The two parts B, C, can be formed rapidly by means of suitable machinery
being each cut from a rectangular piece of wood of suitable size.
D is a block of wood which fits closely within one end of the body of the case
except that this block is cut away at a point opposite the opening in the side of the
case so that the strip c which is secured to the outer end of the map E can pass partly
into the slot or opening in the side of the case when the map is rolled up.
F is a hinge which, as shown, consists of three pieces d, e, f, hinged to each
other. The piece d is secured to the block D by means of a screw, and the
piece f of the hinge is shaped so as to fit the interior of the case and is secured
thereto by means of two screws shown in dotted lines in Figure 3. The piece e
s provided with a slot g to receive a rectangular stud at one end of the map
oller G.
h is a piece of sheet metal spun or stamped into the form shown and secured to the
block D by means of screws. This piece à forms a ferrule v on the outside of the end
of the case as well as a cap over the end. The other end of the case is provided with a
lock of wood H similar to the block D, to which block is secured a piece of metal i

page_text: which is provided with a round hole to receive a round pin or stud on one end of the
map
roller.
jis a metal cap and ferrule similar to h and it is secured to the block H.
k are loops hinged to the end pieces by means of which the map can be hung
against a wall or other place. The map roller is a spring roller of the usual
construction.
A map can be placed in the case by first removing the block D and the cap / from
the case, as shown in Figure 2; then the pin on one end of the map roller can be
inserted in the bole in the metal piece i, then the block D. and cap h can be brought
to their proper position shown in Figure 1, the lug on the adjoining end of the map-
roller entering the slot 9.
By hingeing the block H to the body of the case it and the cap will always be
connected with the body of the case. The map can readily be removed from the
case for the purpose of inserting another, by removing the hinged end piece and
bringing it into the position shown in Figure 2.
The drawings show the map case of full size for all ordinary maps. Other sizes
may be made.
I thus provide a map case, the body of which is made of wood and is very strong
and compact.
The hinged end piece when removed from the case can be turned, if desired, so that
the block D will come in contact with the body of the case, as indicated by a
dotted line in Figure 2, which will give more room for the insertion or removal
of a map..
In Figure 5, I have shown a modification according to which the body of the case
consists of three pieces provided with grooves, and secured together by means of two
gibs. There is no advantage in this form and it will cost more than the form shown
in Figure 3.
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 :-
1. A hollow cylindrical map case provided with a longitudinal map opening and
composed of united sections having the internal and external surfaces struck from two
different centres to thicken the case at the rear and thin the edges of the map opening,
substantially as described.
2. A hollow cylindrical map case consisting of wood sections having their internal
and external surfaces eccentric to each other and provided in their thick edges with
grooves containing a gib secured in place and connecting the parts, substantially
as described.
3. A hollow map case having end pieces one of which is hinged by a plate jointed
at one end to said end piece and at the other end jointed to the inside of the hollow
case, substantially as described.
4. In a map case, a body A, composed of two or more pieces of wood secured
together by one or more gibs b, in combination with an end piece consisting of a
block D and a cap and ferrule h, v, and a hinged piece F connecting the body and end
piece together, substantially as described.
Dated
ISAAC WATTS HENDERSON.
Haseltine, Lake & Co.,
45, Southampton Buildings, London, Agents for the Applicant.