Patent GB-500766-A (GB)
Title: Improvements relating to frame and mask structure for typewriting machines
IPC: B41J29/02
Filed: 1938-03-08
Abstract: 500,766. Typewriters ; knobs. UNDERWOOD ELLIOTT FISHER CO. March 8, 1938, No. 7204. Convention date, Jan. 19. [Class 100 (iv)] [Also in Group XIV] Type-lever machines.-A machine of the kind in which the sides of the framework have spreading horns for supporting a carriage-rail is provided with a framework-mask which extends up to the level of the carriage-rail and has integral or detachable portions for masking the horns. The paper-carriage may be provided with a mask for the stop-devices &c. at the rear of the framework. The mask M shown in Figs. 1 and 5 is applied to a typewriter having framework comprising sides 25, 26 connected at the rear and front by bars 27, 76 and formed with horns 29, 31 for supporting the carriage-rails 30, 32. The bar 76 is arranged at the back of the keyboard 58, the usual front extensions of the sides 25, 26 being omitted. The mask consists of sides 78, a unitary frontpiece 92 arranged at the front of the keyboard, a detachable curved back 106, and a detachable front 118 provided with a hinged door 127 for affording access to the types 123. The sides 78 extend up to the rail 30 and have top flanges 85, 90 and front; rear, and bottom flanges 81, 91, 98, and the front-piece 92 has top and bottom flanges 93, 98. The flanges 85, 81, 90 extend over the sides 25, 26, but, to reduce noise, are arranged out of contact therewith. The sides and front-piece are welded together and are connected also by spot-welded tabs. The sides 78 are sprung over the sides 25, 26 and are secured thereto by screws 126 passing through tabs on the sides 78, the same screws being used also for securing the front 118. The back 106 is secured by screws 107 to tabs 104 on the flanges 91 and is formed with a top 108 which extends close to the rail 32 and is recessed to receive the housing 61 of the tabulating-stops. The sides 78 are formed with recesses 242 serving as finger-holds when the machine is lifted. The door 127 is mounted at the bottom on hinges 130 and is held against a stop 132 by a spring 139. An ornamental knob 136 for the door is formed with a flange 138, Fig. 10, which enters a slot 134, and shoulders 137 on the knob are engaged by a slotted securing-band 140 having tabs 143 which are passed through the ends 135 of the slot 134 and clinched down. The knob and band may be finished in contrasting colours. The mask-sides are at such a distance apart that they are adjacent to the outer parts of the horns 29 of a machine having a normal carriage. For long-carriage machines in which the horns 29 are splayed considerably, the mask-sides are each formed with an opening 198, Fig. 6, through which the horn extends, and a detachable housing 208 is provided for the horn. The housing is provided with a tongue 214 and a projection 212 abutting on the side of the framework and the mask-side respectively. The housing is secured to a member 201 which forms a continuation of the flange 81 and is provided with a tab 217 which is secured by one of the screws 126 to the side of the framework. The top of the member 201 abuts on an extension of the plate 118. The housing may be formed with a tapering part which depends to the bottom of the masksides and is formed with hooks and tabs for engaging slots therein. Specification 428,383 is referred to. Paper-carriages.-The ends of the carriage 40, Fig. 5, are provided with flanged masking- plates 190 having the lower edges shaped to match the flange 85 of the mask M. The platen-frame 50 supports a table 150 having at the rear a depending apron 164 which is continuous with the back 106 of the mask. The table and apron form a shed for the stopmechanism 63 at the rear of the carriage, the ends of the shed being closed by wings 165 which are bent forwards from the apron and secured at the top to angle-pieces on the table. The table is secured by screws 153 to a bar 148 which is secured to tabs on the platen-frame, the bar having countersinks receiving countersinks formed in the table to receive the screwheads. The table is also secured by screws to lugs 147 on the platen-frame. Sheet-guiding arrangements.-A paper-finger 173, Fig. 5, arranged in a depression 185 in the table 150 is formed with a bend 178 which passes through a slot 177 in the apron 164 and has slotted ears 180 and a spring-finger engaging a bar 172 detachably mounted in the end parts 165 of the apron. The paper-finger is formed with a lug for reading a scale on the table, and is provided with a felt backing 184. Sound-deadening supports and cases.-Feet 101, Figs. 1, 5 and 6, are secured by screws 103 which pass through enlarged holes in ears 99 on the mask-flanges 98 and are threaded into bosses 102'on the sides 25, 26 of the framework, pads 102a being placed between the bosses and flanges. The mask M and housings 208 are provided with sound-deadening linings 234, 240, and the tabs 214 of the housings have felt pads 215. The table 150 and apron 164 are provided with sound-deadening linings 151, 187.