Patent GB-501157-A (GB)
Title: Printing apparatus
IPC: B41K3/04
Filed: 1937-10-21
Abstract: 501,157. Typewriters. DEHN, F. B. (Reynolds Applicances Corporation) Oct. 21, 1937, No. 28784. [Class 100 (iv)] Index type-case machines.-In a machine of the kind comprising a base provided with an overhanging arm supporting a carriage in which is, mounted a movable case containing vertically movable types, the card &c. to be printed is line-spaced and letter-spaced by means of a bar which is mounted to move longitudinally and laterally on the base. The machine shown in Figs. 1 and 12 comprises a base 21 provided with an overhanging arm or bracket 22 supporting a laterally movable carriage 23 which supports a longitudinally movable type-case 24. The carriage is provided at the rear with a rail 55 supported by rollers on the bracket, and is provided at the front with a rail 56 supported by balls 68 arranged in a track 57 secured to the bracket. Rollers 63, 71 prevent the carriage from tipping. The type-case is provided with rollers 84, 88 which engage rails 83 on the carriage. The type-case is provided with rows of upper and lower-case types 95 secured to square rods 73 which are guided vertically by plates 78, 79 and are arranged under indexed apertures 100 in the top plate 77 of the type-case. Returning-springs 96 for the types abut on the plate 79 and washers 97 on the rods. An impression-plunger 25 is guided vertically by plates 107, 108 on the bracket 22 and is depressed by depressing a crank 116 in connection with a toothed sector 119 co-operating with studs 120 on the plunger. The crank is provided with an adjustable stop 194. The type-case is manipulated by a handle 90 to bring the aperture 100 corresponding to the selected type beneath the plunger, and the crank is then depressed to effect impression on a card C supported by the base 21. If the type is slightly out of alignment, the tapered end of the plunger co-operates with the aperture to shift slightly the type-case. The base is provided with a rubber impression-plate 32. When the machine is out of use, the carriage is locked by co-operation of a latch thereon with one end of the rail 57. The types are inked by means of rollers 102 mounted on spring-arms 103 on the carriage 23. Card-clamping arrangements; line-spacing mechanism ; Letter-spacing mechanism.-A bar 26, Fig. 1, is provided with clips 124 for engaging the front edge of the card C, and is longitudinally guided on a member 126 which rests on the base 21. Slides 140 secured to the member 126 enter slots 138 in the base and are connected to racks co-operating with pinions on a shaft provided with a knob 135 which is turned to line-space the card. The base is provided with a line-spacing scale 143. The shaft is frictionally braked. The bar 26 is moved longitudinally for letter-spacing by means of a dog 172, Fig. 15, carried by a slide 174 which is mounted on the front edge of the bar and has pin-and-slot connection 169 to an arm 160 splined on a rock-shaft 159. The dog is formed in the rear edge with a notch 182 engaging the bar 26, and is forked at the bottom to engage the bottom of a wedge-shaped opening 175 in the slide 174. A spring 183 urges the dog into inclined or gripping position.' The shaft 159 is connected to a rock-arm 155, Fig. 12, having pin- and-slot connection 163 to a plunger 146 which is guided by the plates 107, 108 and is connected to the impressionplunger 25 by a spring 149 and a pin-and-slot 150. When the crank 116 is depressed, the plunger 146 moves downwards with the plunger 26 until the wedge-shaped end 148 of the plunger 146 enters one of a number of slots 193 formed in the plate 77 and arranged adjacent to the corresponding apertures 100. During descent of the plunger 146, the shaft 159 is rocked, the slide 174 is moved towards the right, and the dog 172 moves into vertical position. When the crank is raised, the plunger 146 is raised by means of the plunger 25, the slide 174 is moved towards the left, the dog is moved into inclined position, and the bar 26 is gripped and moved with the card through one letter-space. Overthrow is prevented by co-operation of a spring-urged shoe on the bar 26 with the member 126. To permit of free movement of the bar, the dog can be released by means of a finger-piece. To provide for differential letter-spacing, the slots 193 are graded in width and co-operate with the wedgeshaped end of the plunger 146 to adjust the stroke of the plunger, and consequently the letter-spacing movement, in accordance with the width of the types. Printing-line indicators.-On depression of a slide 200, Fig. 1, mounted on the carriage 23, a lug provided with a mark indicating the printing line is moved into contact with the card C.