GB679945A - Loose leaf memorandum index device - Google Patents

Abstract

679,945. Filing papers; indexing. BROWN & BIGELOW. May 30, 1950 [May 31, 1949], No. 13502/50. Classes 16 and 146 (i). An index device A comprises a casing 10 for a pack B of loose leaf cards 12 provided with identifying indicia, a plurality of keys 14 with corresponding indicia connected with lifting fingers 23 so as to raise one or more cards to expose a selected card upon actuation of the corresponding finger key and a closure key 27 adapted upon actuation to return the raised card or cards to initial position. The pack B of cards, positioned in a recess 11 are provided with notches 26, the number of notches increasing downwardly in the pack from one side so that each finger 23 passes through a number of notches to lift all cards 12 with no notch in that position. The fingers 23 are mounted on a common rod 24 and are operated by rods 17 pivoted thereto at 22 and to which the keys 14 are connected by hooks 16 passing through slots 15 in the sloping front 13 of the casing. A cover C is provided having a recess 19 for cards 12 and is pivoted on rod 24 by end plates 18 which have arcuate tracks 20, the cards 12 being held on the tracks by notches 21 and the cover C being lifted by the fingers 23 to the position of Fig. 2 where it is held by contacting the back wall of casing 10. The closure key 27, operating in a slot 15 in casing front 13, is formed with a hook to engage a rod 28 which is pivoted to one end of a cross bar 29 at 30, the bar 29 being centrally pivoted at 32 to a plate 31 and having at the opposite end a shoe 33 to engage the edge 34 of the cover so that operation of key 27 pushes the raised cover C and any cards 12 in the recess 19 over the dead centre so that the cover falls by gravity to the closed position. The plate 31, which is supported on lugs 38 on the bottom plate 39 of the device, is provided with holes for springs 37 connected to the hooks 16 of the keys 14 so that keys 14 and fingers 23 return to normal position on release of the keys. A locking bar 43 is provided to prevent operation of any other key 14 when the cover C has been raised, the bar 43 being pivotally supported in loops 45 on the bottom 39 and operated by the edge 34 of the cover C, which, when raised, presses the bar 43 to engage notches 46 in the fingers 23, the bar falling out of engagement when the cover is closed.