Patent GB-779224-A (GB)
Title: List finders
IPC: B42F17/34
Filed: 1955-09-22
Abstract: 779,224. Filing papers; indexing. NEILSEN, H. L., and NEUSTADTER, A. Sept. 22, 1955 [May 13, 1955 ; May 25, 1955], No. 27106/55. Class 146(1). A telephone index or list finder comprises a base 10, a cover 12 pivoted at 14 on the base 10 and a stack of cards 16, having separate serially arranged tabs 36 secured by slots 18 on beads 20 of discs 22 on the pivot rod 14 ; a single operating lever 30 slidable in a slot 64 on the base 10 with an operating part 32 and a card lifting part 34 adapted to underlie the tab 36 of any selected card 16 and to partially pivot the card, overlying cards and the cover away from the base and card holding means 42 on the cover 12 movable automatically into holding engagement with the selected tab subsequent to the partial pivotal movement to constrain the lifted cards to move with the cover to a fully open position. Springs 24 encircle the rod 14 at each end to urge the cover to open position, the cover being held in closed position by a pressed out bump 26 engaging a slightly yielding cross member 28 mounted on the base 10, to leave the slot 64, by means of depending tongues 60 passed through slots 62 and twisted through 90 degrees. The lever 30 pivots about a heel 38, the heel and card lifting part 34 lying across a transverse depression 70 in the base 10 and a portion 68 on the lever lies adjacent a series of indicia 66 pivoted on the cross member 28. One or more beads 71 assist in holding the lever 30 firmly in the slot 64 and a button 74 is pressed downwardly by a spring 78 in an aperture 76 in the lever to engage one of a number of dimples 72 in the depression 70, arranged so that the part 34 lies centrally of the tab 36 associated with the dimple 72. The card holding member 42 comprises a wire bail 44 with side arms 46 pivoted by studs 48 to side walls 50 of the cover 12, the side arms 46 having oblique free ends to engage the flat top of the cover to limit the pivotal movement to card holding position, to which the bail is pressed by springs 54. On closure of the device, the bail 44 rides down an inclined slope to lie out of the way of the tabs. As shown in Figs. 1, 3, this slope is provided by an inclined edge 56 of a tongue 58 struck up from one side of the base 10. As shown in Fig. 13, the slope is provided by an inclined part 92 of a hold-down device 88. This device 88 comprises a wire finger of which the tip 90 lies over the tabs 36 and is positioned relative to the card lifting part 34 of the lever 30, so as to lie over the tab of the first card unraised. The finger 88 has a part lying in and secured in a groove 96 of the heel 38 to pivot therein, so that the finger moves with the lever 30 but is not pivoted therewith, but is held down by the bail 44. Also in Fig. 13, a non- tabbed card 100, with slots 18 to engage the beads 20, lies over the cards 16 and has a distance piece 102 to press on the cards in the closed position so that their tabs 36 lie under the finger-tip 90, the eyelet being arranged adjacent that side of the device where the tabs are uppermost. As shown in Figs. 1 and 3, a top card 86, with slots 18, is provided with a spring 82, secured by an eyelet 84, to press against the cover in the closed position so as to hold the cards 16 compacted. Specification 736,199 is referred to.