US3822082A

US3822082A - Magnetic card filing equipment

Info

Publication number: US3822082A
Application number: US00280168A
Authority: US
Inventors: Mathiesen N Per
Original assignee: Individual
Current assignee: Individual
Priority date: 1972-08-14
Filing date: 1972-08-14
Publication date: 1974-07-02
Anticipated expiration: 1991-07-02

Abstract

A magnet card filing system of the type in which the cards, having inserts of magnetic material, are spread apart by magnetic repulsion induced in the inserts by permanent magnets associated with the tray containing the cards. In the present case each card has an insert adjacent an upper corner and a second insert adjacent the diagonally opposite lower corner, the tray having elongated permanent magnets adjacent said inserts for inducing the usual repulsion effect and additionally for holding the bottom edges of the cards in close contact with supporting rails at the bottom of the tray, whereby inadvertent tilting or lifting of the cards is prevented.

Description

Q J United States Patent [191 [111 3,822,082 Mathiesen July 2, 1974 MAGNETIC CARD FILING EQUIPMENT Primary Examiner-Paul R. Gilliam [76] Inventor: Nicolaus Per Mathiesen 1512 Attorney, Agent, or FirmWatson, Cole, Grindle &

Primm Ave., San Jose, Calif. 95122 Watson PP ,168 A magnet card filing system of the type in which the t cards, having inserts of magnetic material, are spread 52 us. Cl. 312/183 40/105 5 aPart by magnetic repulsion induced in the inserts by [51] Int. CL A4 63/00 (309d I/O'O permanent magnets associated with the tray contain- [58] Field 312/183. 1 "MG ing the cards. In the present case each card has an in- 248/106 40/105 sert adjacent an upper corner and a second insert adjacent the diagonally opposite lower corner, the tray [56] References Cited having elongated permanent magnets adjacent said inserts for inducing the usual repulsion effect and addi- UNITED STATES PATENTS tionally for holding the bottom edges of the cards in Rosenberg close ontact upporting rails at the bottom of the tray, whereby inadvertent tilting or lifting of the 3:465:460 9/1969 Dahl I: .1: 40/10515 Cards prevented 5 Claims, 3 Drawing Figures l MAGNETIC CARD FILING EQUIPMENT BACKGROUND OF THE INVENTION 1. Field of the Invention Magneticcard filing systems now in use employ cards provided with insertsof soft iron or other magnetic material, usually one such insert being provided adjacent each upper corner of each card. The cards are stacked in trays provided with rails on which the lower or bottom edges of the cards rest, and permanent magnets adjacent the upper edges of the side walls of the trays are used to cause spreading or fanning out of the cards through induced magnetic repulsion acting between the inserts in adjacent cards. Such systems are disclosed in U.S. Pats. Nos. 2,656,091, 2,722,936, 2,871,862 and 2,984,243.

Such systems, on the whole, have proven quite satisfactory, but are subject to the difficulty that, occasionally, one or more of the cards that are spread apart, and thus relieved of static frictional forces tending to keep them in mutual'alignment, may be sufficiently affected by the attractive force of one or another of the adjacent permanent magnets to tilt laterally toward the magnet and thus become disaligned with the other cards of the tray, requiring manual replacement in proper position. Also, since the inserts are usually spaced somewhat below the upper edge of the associated card and thus below the upper edges of the adjacent magnets, there is a lifting tendency which may result in a nonuniform position of the upper edges of the cards.

2. Description of the Prior Art The patents mentioned above are the prior art.

SUMMARY OF THE INVENTION representative of shown in the accompanying drawings and detailed descriptive language is employed. It will nevertheless be understood that no limitation of the invention is thereby intended and that various changes and alterations are contemplated such as would ordinarily occur to one skilled in the art to which the invention relates.

The indexcard designated 10 in FIG. 1 is provided with an insert 1 l of magnetic material, for example soft iron, at its upper right-hand corner and a second similar insert 12 at its lower left-hand corner. The inserts l1 and 12 preferably, but not necessarily, extend to the adjacent edges of the card l0 and in any case must be located near diagonally opposite corners of the card. In all other respects, the cards 10 may be similar to those heretofore used in magnetic card tiling systems such as described above.

Referring to FIG. 2, the tray 13 comprises end walls 14 and 15,

side walls

16 and 17, and bottom 18, all of nonmagnetic material. As best seen in FIG. 3, the side wall 17 is formed to provide a substantially vertical lower portion 19, an inclined intermediate portion 20 and a substantially vertical upper portion 21 with an inturned angle portion 21' at its upper edge. The side wall 16 is preferably, although not: necessarily, vertical and is similarly provided with an inturned angle portion 22 at its upper edge. The angle portion 21' assists in locating the elongated, vertically polarized permanent magnet 23 which is affixed to the inner surface of the 0 portion 21 of the side wall 17, and both angle portions According to the present invention, the aforesaid disadvantages are overcome by repositioning the card inserts of magnetic material, one being placed at or near an upper corner of the card and the other at or near the diagonally opposite lower corner. The permanent magnets are similarly repositioned, one of them serving as I a bottom rail of the tray, which has a nonmagnetic rail at the other side of the bottom, and the other magnet being affixed to an upper portion of a tray side wall, adjacent but spaced laterally from the upper corner card inserts and positioned slightly lower than directly opposite said inserts, whereby both magnets exert a downward pull on the cards, maintaining their lower edges in firm contact with said bottom rails. In this'way the inadvertent tilting or lifting of the cards is prevented, while at the same time the cards can be readily moved by hand, as desired, and the repulsion spreading effect is not hindered but, to the contrary, is enhanced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a card provided with magnetic inserts in accordance with the invention;

FIG. 2 is a perspective view of a tray containing a number of cards, all in accordance with the invention,

one end of the tray being partly broken away; and

FIG. 3 is a transverse section on line 3-3 of FIG. 2.

21 and 22 serve to stiffen the

side walls

16 and 17 which may be made of relatively light and flexible material. An elongated, horizontally polarized permanent magnet 24is affixed to the bottom 18 adjacent the side wall 16 and serves as one bottom rail upon which the lower edges of the cards 10are supported. A bottom rail 25 of nonmagnetic material but similar in shape and dimensions to the magnet 24 is affixed to the bottom 18 adjacent the lower portion 19 of the side wall 17.

It will be noted thatthe magnet 23 affixed to the upper portion 21 of the side wall 17 is, by reason of the outward inclination of the wall portion 20, spaced slightly laterally of the card inserts 11, and by reason of the angle portion 21' is displaced slightly downwardly from a position directly opposite the inserts 11. The attractive force of the magnet 23 uponthe inserts 11, therefore, is exerted downwardly and laterally as indicated by the

arrows

26 and 27 of FIG. 3 which combine to produce a resultant force indicated by the arrow 28. This force, together with the attractive force exerted by the magnet 24 upon the inserts 12, cause the lower edges of the cards 10 to be held firmly against the

bottom rails

24 and 25, without in any way interfering with the repulsion effect between the inserts of adjacent cards which cause the cards to separate or fan out as seen in FIG. 2. This hold down effect is optimum if the lower insert 12 extends to the lower edge of the card 10, as shown, so that it makes direct contact with the magnet 24. This direct contact also enhances the repulsion forces and thus the fan out effect.

Naturally, the positions of the magnets and inserts may be reversed from that described above and shown in the drawings, so long as one insert is near one upper comer of a card and the other insert is near the diagonally opposite lower corner thereof, the permanent magnets being placed accordingly.

1 claim:

1. In a card file system of the type in which the cards are provided with inserts of magnetic material and the tray for holding the cards is provided with one or more permanent magnets for inducing like magnetic poles at corresponding positions in the inserts of adjacent cards, whereby the cards are caused to spread apart by magnetic repulsion, the improvement consisting in providing each card only with one magnetic insert near one of its upper corners and a second magnetic insert near its diagonally opposite lower corner, and providing the tray with longitudinally extending permanent magnets located adjacent said inserts, one of said magnets constituting a bottom rail of said tray and being horizontally polarized and the other said magnet being affixed to a side wall of said tray near the upper edge thereof and being vertically polarized, said last mentioned magnet being located near said upper corner inserts but spaced therefrom laterally and displaced slightly downwardly from a position directly opposite said upper corner inserts, whereby the magnetic attractive forces exerted on said upper corner inserts act laterally and downwardly, said tray having a non-magnetized bottom rail at the side opposite said first magnet, the attractive force exerted by both magnets serving to cause firm contact between the lower edges of said cards and said bottom rails while permitting the cards to spread apart through magnetic repulsion.

2. The combination defined in claim 1, said side wall to which said other magnet is affixed having a substantially vertical lower portion, an outwardly inclined intermediate portion, and a substantially vertical upper portion to the inner surface of which said magnet is secured.

3. The combination defined in claim 1, the lower edge of said second magnetic insert extending to the lower edge of its associated card whereby it is adapted to make direct contact with said bottom rail magnet.

4. A file card for use in a card file system of the type in which the cards are provided with inserts of magnetic material and the tray for holding the cards is provided with one or more permanent magnets for inducing like magnetic poles at corresponding positions in the insert of adjacent cards, whereby the cards are caused to spread apart by magnetic repulsion, the improvement wherein each card only has one magnetic insert near one of its upper corners and a second magnetic insert near its diagonally opposite lower corner whereby when such card is utilized in a card file system the magnetic forces which act on the upper insert in the card act in a lateral and downward direction.

5. A file card as defined in claim 4, said second insert extending to the lower edge of said card.