card is so fitted into a metal hinge that it overlapes the on before
it, the name and address on it being visible without touching another
card. The trays or frames may be fitted horizontally into cabinets
or attached vertically to metal stands. The hinges enable the
operator to writer on each card, either on back or front, without
removing it from its place.
A modern method of visible card
indexing is operated with the help of card wheell in which cards are
attached to metal rods surrounding a wheel set on a tub or stand.
The wheel rotates and can be spun around or held in any position by a
brake. It can hold between 1,000 and 5,000 cards. Any card can be
examined without removing it from the wheel. Entries can be made in
particular cards buy applying the brake to keep the wheel in a
certain position. Cards can be inserted of taken out whenever
necessary through slits in the metal rod.
The strip index is yet
another method of visible indexing which can be used when these
entries in an index in limited to a few lines (names, addresses,
reference, etc.). It consist, of a frame into which strips of stiff
paper can be fitted in any required order. Each strip is devoted to
one item. Frames can be either fixed on the wall, held in a book
form, or arranged on a rotary stand which can be turned round to look
at any part of the index.