AN IMPROVED REVOLVING CHART AND MAP STAND
Year: 1884

page_text: I, ALEXANDER MELVILLE CLARK, of the Firm of A. M. and WM. CLARK, o
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of the said Invention for "AN IMPROVED
REVOLVING CHART AND MAP STAND," to be as follows:
17
The object of this Invention is to facilitate the exhibition of maps, charts, and
other articles, in schools, and other places where the same article is to be shown to
several persons at the same time.
.The Invention consists in a revolving map and chart stand constructed and
operating as will be hereinafter fully described.
The stand is constructed of a lower stationary part and an upper revolving part
the two being united by a centre bolt. The lower part is a tripod stand consisting
of a base block cast on the centre bolt and having a downwardly projecting flaring
hollow socket forming seats in which the three rods or legs are clamped by
a triangular wedge block held in place by a wing nut on the centre bolt. Upon
the base block is placed the upper or rotary block which is cast with two diverging
sockets to receive the upper supporting rods, this upper block being held in
position by a wing nut on the upper end of the centre pin. The upper ends of the
supporting rods are bent into a vertical direction and pass through eyes in a cross
rod from which the maps &c. are suspended by sliding hooks thereon, the ends of
said suspension rod being bent upwards to receive the rings of large maps &c.
With this construction maps and charts can be readily suspended in any desired
place, and can be turned while suspended to face in any desired direction.
The various parts of the stand can be readily put together and taken apart, and
can be compactly packed for storage, and transportation:

page_text: I, ALEXANDER MELVILLE CLARK, of the Firm of A. M. and WM. CLARK, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of the said Invention for "AN IMPROVED
REVOLVING CHART AND MAP STAND" and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:
The object of this Invention is to facilitate the exhibition of maps, charts, and
other articles, in schools, and other places where the same article is to be shown to
several persons at the same time.
The Invention consists in a revolving map and chart stand constructed and
operating as will be hereinafter fully described.
Reference is to be had to the accompanying Drawings forming part of this
Specification in which similar letters of reference indicate corresponding parts in
all the Figures.
Figure 1 is a rear elevation of the improvement, illustrating its use. Figure 2
is a sectional elevation of a part of the same. Figure 3 is a sectional plan view
of the same, taken through the line x x Figure 2. Figure 4 is an elevation of one
of the supporting rods. Figure 5 is a plan view of the suspension rod.
A represents the base block of the stand, which is cast upon a central rod B,
having a screw thread at each end to receive the hand nuts C. D.
Upon the lower side of the base block A, is cast a downwardly projecting
triangular flaring hollow flange or socket E, the triangular interior space of which
is tapered and has rounded side edges to form seats for the upper ends of the
lower supporting rods F, which are clamped in place by a triangular wedge
block G, perforated longitudinally to receive the lower part of the rod B, and
forced into place against the supporting rods F, by the nut C screwed upon the
lower end of the rod B, as shewn in Figure 2.
By this construction, the base block A, will be firmly supported by the three
rods F which serve as legs. Upon the base block A is placed the upper or rotary
block H, upon the upper side of which are cast two outwardly inclined sockets I,
which are connected near their outer ends by a cross bar J.
The rotary block H and the cross bar J are perforated through their centres to
receive the upper part of the rod B, and are kept in place upon tho said rod by
the nut D.
With this construction, by loosening the nut D, the block H can be turned into
any desired position, and by tightening the said nut, the said block will be firmly
clamped in place.
In the sockets I, are placed the lower ends of the upper supporting rods K
Figure 1 the upper ends of which are bent into a vertical position, so as to pass
through eyes L, formed in the rod M, from which the maps, charts, or other articles
are suspended.
The rods F, K, are all made exactly alike, so that no care will be required in
arranging them in place.
The suspension rod M, is provided with a number of sliding hooks N, to receivo
the rings of the maps or charts to be suspended and the ends of the said rod are
bent upward at right angles to adapt them to receive the rings of large maps or
charts.
With this construction, maps and charts can be readily suspended in any desired
place, and can be turned while suspended, to face in any desired direction.

page_text: The various parts of the stand can be readily put together and taken apart, and
can be compactly packed for storage and transportation.
Having now particularly described and ascertained the nature of the said
Invention and in what manner the same is to be performed, I declare that what
I claim is:-
1
A revolving chart and map stand, constructed substantially as herein shown
and described, and consisting of the base block A, having screw rod B and
nuts C, D, and triangular socket E, the revolving top block H, having sockets I,
the triangular wedge block G, and the supporting and suspension rods F, K, M,
as set forth.
2nd In a revolving map and chart stand, the combination with the base block A,
having screw rod B, and triangular socket E, and the supporting rods F, of the
triangular wedge block G, and the nut C, substantially as herein shown and
described, whereby the said block and rods can be firmly connected, as set forth.
3rd In a revolving map and chart stand, the combination with the base block A,
having screw rod B, of the revolving block H, having sockets I, to receive tho
upper supporting rods K, and the nut D, substantially as herein shown and
described, whereby the suspended map or chart can be readily turned to face in
any direction, as set forth.
4th In a revolving map and chart stand, the combination with the upper
supporting rods K, having bent upper ends, of the suspension rod M, having
eyes L, and bent ends, and provided with slide hooks N, substantially as herein
shown and described, whereby maps and charts of different sizes can be readily
suspended, as set forth.