Education and demonstration – Geography – Map or terrain model
Patent
1982-04-02
1984-04-17
Grieb, William H.
Education and demonstration
Geography
Map or terrain model
281 31, 283 34, 16355, G09B 2910
Patent
active
044431988
ABSTRACT:
A folding board used as a backing for pamphlets, maps and graphic and printed material consists of four or more sections. Three sections are hinged together along the lengths of abutting edges; the fourth is hinged to one section along the length of an edge abutting one other section, but disconnected along the length of another such edge except by a fourth hinge. The sections are folded flat against each other along three hinges. The fourth hinge has its axis above the place of two sections to permit flat folding of all sections. Various types of hinges are disclosed. How more than four rectangular sections may be hinged together is disclosed. Illumination means for the board and compass to be used with a map on the board are shown and described. Various scales for locating the coordinates for a map may be used. One such scale is hinged; another is telescopic.
REFERENCES:
patent: 52891 (1866-02-01), Schaefer
patent: 512882 (1894-01-01), Hillhouse
patent: 827670 (1906-07-01), Russell
patent: 1110217 (1914-09-01), Maull
patent: 1110901 (1914-09-01), Cowles
patent: 1276657 (1918-08-01), Ibanez
patent: 1526044 (1925-02-01), Blake
patent: 2789372 (1957-04-01), Ribak
patent: 4360346 (1982-11-01), Ehsanipour
Caplan Julian
Grieb William H.
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