Patent GB-108698-A (GB)
Title: Improvements in Apparatus for Checking and Recording Movements, Actions and Transactions and the like.
Inventor: LIDDLE JAMES ANDREW
IPC: G09B29/10
Filed: 1916-08-11
Abstract: 108,698. Liddle, J. A., and Smith, C. M. Aug. 11, 1916. Tickets, systems and apparatus for checking and recording, in connexion with the issue of railway &c. tickets. Comprises a fuse sheet arranged in combination with bus-bars so that the closing of the necessary switches causes a record to be made and a catch released to allow the tickets to be withdrawn. Such withdrawal completes the main circuit and blows the fuse, thus preventing a second operation or withdrawal for the same setting of the switches. The fuse sheet consists of a sheet of insulating-material p pierced with slots, through which pieces of tin-foil or other easily fusible metal are passed. Three arrangements of the fuse members are described; in that shown in Fig. 1, the pieces of the foil are separate and pass from back to front of the sheet p. The series of bus-bars r, s are caused to make contact with the ends of the strips and are arranged at right-angles on opposite sides of the sheet. Where strips of fusible metal are looped through the slots, as shown in Fig. 2, the contact devices n, o are carried by an insulating member m and provided with separate leads n<1>, o<1>. In the form shown in Fig. 3, the strips of fusible metal are carried on one surface only and the bus-bars are arranged to make contact at opposite ends of the strips, one of the bars being constructed of comb form to allow this. In a particular application of the apparatus to the dispensing of poisons, a fuse sheet p<4>, Fig. 4, of the kind shown in Fig. 1 is employed and the two series of bus-bars are mounted on cylinders and caused to revolve, the fuse sheet moving between them at each operation. The vertical series of bus-bars s is revolved by hand and is connected to the sheet p<4> by toothed gearing, the horizontal series b<3> being frictionally driven from the sheet. Depression of the switch g<2> causes characteristic type carried by bars s to mark the prescription or a record strip, which is carried on the top of the bars. Brushes B connect the horizontal bars to magnets m<3> controlling catches a<3> which prevent the removal of the bottles until the main switch has been closed and also the switch w<3> corresponding to the bottle. The closing of these switches causes a current to pass through a shunt circuit including a resistance R, adjusted so that the strength of the current is sufficient to lift one catch a<3> only, and contacts x<3>, h<3> which are closed by bars on the bottles. Outward movement of a bottle after the raising of the catch completes the main circuit at x<3>, y<3> and blows the fuse, thus allowing the keeper a' to drop. The blowing of the fuse renders it necessary to turn the bars s through one step before a second bottle can be withdrawn after the replacement of the first. A pawl and ratchet prevent backward rotation of the series s, and a slotted cover is provided which prevents rotation unless the main switch is depressed after the insertion of the prescription or record sheet.