Patent GB-190721488-A (GB)
Title: Improvements in Typewriting Machines.
Inventor: FELL JOHN CORRY
Filed: 1907-09-27
Granted: 1908-06-18
Abstract: 21,488. Fell, J. C., [Wyckoff, Seamans, & Benedict]. Sept. 27. Typewriters. - Relates to tabulating-mechanism for typewriters, means being provided for arresting the carriage in any columnar field without first arresting it at a preceding field, for controlling the speed of the carriage when the tabulating-mechanism is operated, and for operating denominational or decimal tabulating-mechanism within any selected columnar field. The columnselecting mechanism comprises a series of stops 43 carried upon a rack-bar 26 which are engageable by a selecting-stop 108 operated by keys 58. The bar 26 is removably and lengthways adjustably supported on arms 24 of the carriage 15, a fixed cone at one end aud an inwardly spring-pressed cone at the other end of the bar co-operating with recessed bearings in the arms 24. Thus one or more rackbars with differently - arranged stops may be employed. The column stops 43, Fig. 17<a>, ride astride the bar, and are held thereon by a latch-bar which engages the slots 49. The rear faces of the stops are engaged by the denominational stop-levers, while the depending ends 48 co-operate with the column-selecting stop 108. A scale on the rack-bar corresponds with the usual carriage-scale. In the machine shown, there are four column-selecting keys 58, five column rack-stops being provided to control five columns on the paper. Thus the extreme right-hand key 58 causes the column-selecting stop 108, when the carriage moves, to co-operate with the first rack-stop, counting from the left hand side of the machine to select the second column on the paper. If the carriage is in the extreme righthand position, writing will take place in the first column, no key being necessary for the selection of this column. The keys 58 are provided with column indices. The denominations are selected by the co-operation of a series of stops 153 with the column rack-stops. Thus, when a column has been selected by the co-operation of the stop 108 with a particular column rack-stop, a denomination in the column is selected by projecting the particular stop 153 into the path of the next succeeding column rack-stop. The stop 108 is situated about four letter spaces to the left of the left-hand stop 153 so as to provide a space between the columns. If the denominational keys be successively operated to co-operate with the rack-stops without actuating the stop 108, the carriage is arrested four letter spaces earlier than if the stop 108 were used to secure the position. The rack-bar scale must in this event be rearranged if the stops are to be set in accordance with the carriage - scale. Each stem 10 of the keys 58 is U-shaped for the reception of a cap 60, Fig. 12, formed from sheet metal and operates a push-rod 80. The rods 80 move to varying extents a universal bar 94, which is pivoted on a shaft 84 and is linked with the crank 104 on a shaft 106, to which is secured the column-selecting stop 108, Fig. 7. The stops 43 are of varying depths, and the amount of rotation of the stepped stop 108 determines the columnar field in which the carriage is arrested. The pushrods 80 have a pin-and-slot connexion with an arm 83 on the shaft 84, to which is secured an arm 88 linked with a crank 110 on a sleeve 111 upon the shaft 106. The sleeve carries a cam 115 upon which is a concentric member 116, Fig. 7, and which engages a roller upon an arm 119 carrying a gear 122 meshing with a gear 125. The arm 119 is pivoted to the frame, as also is a pendulum arm 126 carrying an adjustable weight 130 and having a pin-and-slot connexion with the gear 125. The operation of a push-rod by a key 58 rocks the cam 115 and lifts the arm 119, thus bringing a pinion 124 on the gear 122 into mesh with the carriagerack 17 and raising the latter out of mesh with the driving-pinion 20. The pinion 125 is caused to rotate by the movement of the carriage and the pendulum is set swinging. The pendulum at first offers small resistance but afterwards allows the carriage to move at a uniform speed 'which can be determined by adjustment of the weight 130. When the carriage has been arrested by the action of the stops 43, 108, the speed-controlling device is automatically thrown out of action, and the carriage is re-engaged with its pinion 20. The shaft 106 is movable towards the left of the machine against a spring by the impact of the stops 43, 108. The sleeve 111 is carried along by the shaft, and the roller on the arm 119 drops on to the concentric member 116, thus releasing the pinion 124 from the rack 17 which returns to the pinion 20. During the movement of the shaft, the stop 108 abuts against a partly rotatable eccentric 145. The eccentric face provides an easy return rotation of the stop 108 to its normal position and ensures the absence of final pressure between the stops 43, 108. A spring restores the eccentric 145 to its normal position. The denominational keys operate pushrods 150 connected to the stop-levers 153 which are pivotally restrained between rods 159, 160 carried by a casing 158 ; this is mounted so that it can be swung rearwardly about its base to give access to the escapement mechanism. Operation of the keys actuates a universal bar 167, hooked to which is a link having a pin-and-slot connexion with an arm on the sbaft 84. The connexion is such that operation of the bar 94 does not affect the bar 167, but when the latter is operated the carriage speed and release controlling mechanism is brought into play. An additional key 177 is provided for releasing the carriage without interposirg the tabulator stops ; it operates a push-rod 184 having a pin-and-slot connexion with an arm on the shaft 84. Rotation of this shaft operates the carriage speed and release controlling-mechanism. All the key-levers are returned by springs to their normal positions after being depressed. A rubber foot 194 is secured at each side between the baseplate and a plate 189, a semicylindrical recess in the latter being threaded internally.