the need to read with the very souls of men is more evident in the present era of progress than ever before publishers bookstores a new stand for all thousands of books magazines and newspapers every day to both introduced at the close of the last century are now the most widely you of special jobs these composing machines produce typecast in complete lines plug here is a slug are lined up type turned out by these machine the lines of type properly arranged make up the page from which after entering the imprint our proof is made the function of the keyboard composing machine is to produce the essential materials required to prepare a form for printing but before going into detail let's first get a general view of the whole picture the operator the pressing the key releases mattresses from the magazine channel the mattresses are delivered to the assembling elevator in the correct se transfer time no the mattresses are transferred to the second elevator and raised to the distributor here lifted automatically one at a time they are returned to their respective channels in the magazine the circulating matches will be used over and over as they are needed for composition using this simple sketch of the machine let's go over the various steps already seen the mat responding to the keyboards are delivered to the assembling elevator the line of mattresses is sent to the casting unit has been cast the mattresses are carried by the elevators and transferred projects of the operations necessary to produce the plug our line of type are divided into three groups composition of the casting of the plug distribution of the mattresses let's now analyze the operations in the first group composition regarding composition the principal parts are the keyboard the magazine the assembly and partition the metrics delivery about the assembl elevators and the delivery slide the keyboard has ninety key is on the six rows of fifteen it is divided into three sections the lower case letters are at the left upper case in similar arrangement at the right at the center punctuation mark numbers and small cap every part to the key release is the required metric from the magazine internal parts of the keyboard activated by one touch of a key to release them accurately on the magazine they are the key bottom the keyboard lever the key bar the trigger the motion of the trigger allows the frame to lower itself so that the cam revolves around the rubber roller which rotates continuously let's study that operation more closely the upper end of the rod transmits the movement to a half moon shaped device c the same operation are repeated at every touch of a key one below and one above which as in our case can be made out with a light on the inside of the magazine there are groups called channels which support and guide the circulating the magazine has ninety channels corresponding to the ninety keys on the keyboard every channel contains a maximum of twenty one circulating maps which are sufficient for the normal requirements of keyboard the uppercase letters roman and it calyx controlled by the right section the small cap numbers and punctuation marks controlled by the middle section of the keyboard and changing to another type larger or smaller the magazine might be changed similarly in going to another series or letter design it is precisely for this reason that other pre selected magazine is brought into working position with the statement aligned over the key ro now we will see the whole operation in slow motion they are guided in their descent by the assembler and transportation which prevent them from turning out of correct position these moving lever is control of the duplex re both face rests on the movable duplex rails in each mat can present independent plate to the mode opening either one of the two characters here is a line of mattresses released by the keys situated at the left of the keyboard to those which believe the mattresses on the magazine small head is held stationary by the lugs in the grooves of the first elevator so it remains fixed when the corresponding slide rises in that manner the expansion of the state's ban is obtained whatever the position determined link thereby increasing the space between words even lee this is called justification channel to the earth elevator at this point we end the operations of the first group and take up the second the casting