Patent GB-191501599-A (GB)
Title: Improvements in Typewriting Machines.
Inventor: JAMES REGINALD WILLIAM
IPC: B41J25/18
Filed: 1915-02-01
Abstract: 1599. James, R. W., [Remington Typewriter Co.]. Feb. 1. Tabulating - mechanism; tabulating - key actions.-Key-operated denomination stops are arranged so that the spacing of the stops can be adjusted. In the arrangement shown in Figs. 1, 2, 5, and 10, the denomination stops 62 and their actuating-levers 73 are mounted in a housing 47, which is mounted on a bracket 16 on the top plate 3 by means of slotted ears 48 engaging rods 50. The slots enable the housing to move to the right in reverse tabulating and thus compensate for the thickness of the denomination stops and the column stops 46. A spring 124 returns the housing to the normal position. The housing consists of a trough formed at the middle with vertical plates 47<a>, 47b, the housing being covered by detachable plates 53, 58. The plates 47<a>, 47<b> are each formed with a recess 61 of the same width as the series of denomination stops. The denomination stops ride on the bottom of the recesses 61 and are spaced apart by blocks 63 formed with shoulders to engage the plates 47<a>, 47<b>, the middle spacing-block also engaging notches 65 in the plates 47<a>, 47<b> and notches 66 in the cover-plate 53. By providing sets of spacing- blocks 63 and end or filling blocks 63<Î> of different thicknesses, the spacing of the denomination stops can be adjusted, the blocks and stops being readily removable on detaching the cover-plate 53. The actuating-levers 73 each consist of arms 75, 76 connected by a bar 74 formed on the lower edge with two lugs, which rest on the bottom of the housing and engage apertures 71 in a detachable spacing- plate 69. The spacing-plate can be readily replaced by a spacing-plate having its apertures arranged for a different spacing of the denomination stops. The apertures 71 are stepped in four series, the steps being in opposite directions on opposite sides of the centre line. The vertical arms 75 engage recesses 78 in the denomination stops, and the arms 76 extend through slots in the housing and are connected by links 80, bell-cranks 81, and links 87 to tabulating-keys 93. The links 80 and the bell-cranks 81 are arranged in two groups, and the links 87 are equidistant at the front and then form two groups converging to the two groups of bellcranks. To provide more room for the links 87, the arms of each bell-crank, except the middle bell-crank of each group, are spaced apart by a sleeve 82. A frame 96 secured to the frame 1 of the machine is formed in the front plate 97 with guide-apertures fitting the keys, and in the rear plate 98 with large apertures through which the keys are passed in assembling the mechanism. The keys are hollow and are threaded to engage the links 87. The keys are formed with flanges 95 which are normally held against the plate 97 by returning-springs 100 arranged between a plate 102 and the keys. The plate is slotted to fit over the links 87 and is formed with a flange 104 arranged under the frame 1. An index-plate or scale 107 for the keys is secured to the frame 1 and extends over the plate 97. The bracket 16 which supports the housing 47 also supports a shaft carrying an escapement-wheel 25 and a feedpinion 13. In the modified form of tabulating- mechanism shown in Figs. 11 and 13, the denomination stops 62<a> move in planes which are inclined to the faces of the column stops 46, thereby rendering easy the disengagement of the stops on release of the tabulating - keys. The spacing-blocks for the denomination stops are adapted to be set parallel to the planes of the denomination stops. The apertures 169 in the spacing-plate 168 are preferably rectangular and are arranged so that the cross-bars 73<a> of the actuating-levers are set at right-angles to the planes of the denomination stops, so that the actuating-arms move in planes parallel to the denomination stops. The housing 127 is struck up from a single sheet and is formed with slotted ears 129 engaging screws 131, which are received by cross-arms on a bar or bracket 133 secured by screws passing through apertures 136 to a second bracket, which is secured to the top plate of the typewriter and carries the shaft of the escapement-wheel and the feed-pinion. The provision of a separate bracket 133 for the housing enables the housing to be readily detached for the substitution of a different tabulating - mechanism, such as a column-selector. The side cover-plates 142 for the housing are each formed with a lug 141 engaging a slot 140 in a lug 139, and with a tongue 144 engaging a flange on the top coverplate 145, this being secured by screws 146. On detaching the top cover-plate, the side coverplates can be turned back and then be detached. The spring 149 for returning the housing after the operation of reverse tabulation is secured at one end to a bracket 148 on the housing, and at the other end to an adjusting-screw 150 mounted in the bracket 133. A stop-lug 151 on the housing limits the movement of the housing by engaging a screw stop 152 on the bracket 133. Carriage-releasing arrangements. - In the mechanism shown in Figs. 1, 2, 5, and 10, a member 31 pivoted at 33 on the bracket 16 is provided with pins 30 engaging a groove 29 in a sliding clutch member 21, which normally couples the escapement - wheel 25 to the feedpinion 13. The denomination stops 62 are formed with lugs 110 adapted to engage a rocking frame 112, which is pivoted on the housing 47 and is connected by a hooked link 120 to a pin 41 on the member 31. The carriage can also be released by means of a bail which is pivoted on the carriage 4 and engages a roller 37 on the member 31. In reverse tabulation, one of the tabulating-keys is operated and the carriage is pushed to the right by hand, the housing 47 with the link 120 being moved slightly to the right when the stops engage. The link 120 is thus tripped from the pin 41, and springs move the clutch member 21 into re-engagement and cause the carriage to be restored to the control of the escapement mechanism, and to be held in the set position. In the mechanism shown in Fig. 11, to prevent the end of the link 158, which connects the pin on the releasing - member to the rocking frame 156 operated by the denomination stops, from binding on the end of the pin 41 and thus preventing the clutch from being restored if the hand is prematurely released from the carriage, the link is rotatably mounted in a bracket 167 and is formed with an offset 163 normally held by a spring 166 against the bracket. If the hooked end of the link engages the pin during the return movement of the housing, frictional binding is prevented by the rotation of the link.