Patent GB-488369-A (GB)
Title: Improvements in and relating to typographical composing machines
IPC: B41B11/06
Filed: 1937-01-05
Abstract: 488,369. Type-bar-making machines. MERGENTHALER LINOTYPE CO. Jan. 5, 1937, No. 312. Convention date, July 6, 1936. [Class 100 (iii)] Magazines.-Relates to magazine-shifting mechanism, more especially adapted for machines having both main and auxiliary magazines. (1) The main magazines A, Fig. 2, are mounted in a movable shift-frame, and the selected magazine is located in operative position by gauge-bars F, arranged in pairs at opposite sides of the magazines, and connected by members F<1>. The gauge-bars are supported to slide upon aligning-pieces F<2>, and are adapted to engage under aligning-lugs F<3>, projecting from the magazine base-frames. The gaugebars are held in operative position by springs, and are retracted by arms F<4> on a shaft F<5>. The bars are controlled by matrix-feelers G, G<1>, which are movable across the distributer and across the lower end of the active magazine respectively, and are operated from the shaft F<5>. The auxiliary magazines B, Figs. 3 and 4, which may be of the short variety, are mounted in a separate shift-frame, and are located in operative position by a pair of notched pawls H, adapted to engage with studs H<3> on the shift-frame. The pawls are operated by arms on a rock-shaft H', to which the matrix-feeler G is connected, so that it serves for the auxiliary as well as for the main magazines. A separate feeler G<9> for the lower ends of the auxiliary magazines is connected to the shaft H<6>. The two rock-shafts F<5> H<6> are operated from a single selecting- handle J, which is moved downwards from a mid position to withdraw the locating-devices of the main magazines, and upwards to withdraw those of the auxiliary magazines, a lostmotion connection being provided to secure that only one set is operated. (2) The weight of both the main and the auxiliary magazines is balanced by spiral springs, and either set can be shifted by means of a single crankhandle N. The main magazines A are guided and supported by a depending slide K, which is movable in a housing K<1> secured to the machine frame. The slide carries a rack K<6> gearing with a pinion K', the shaft of which is connected on each side of the pinion to a pair of spiral springs mounted in casings, which are angularly adjustable to vary the tension. A pawl O, engaging teeth on the slide K, holds the magazines down against the lifting action of the springs, and is retracted together with the locating-devices. The pinion K' is rotated by worm-gearing M<2> from shafts M<4>, M<5>, which are operated by the crank-handle N. The shift-frame of the auxiliary magazines B is guided by rollers, and has an extension B<4> passing between guide-rollers. The magazines are shifted by means of two racks P gearing with pinions P<2>, the shaft of which is connected to a counterbalancing spiral spring. The pinion-shaft is rotated by a vertical shaft R<3> and worm-gearing S from a horizontal shaft S<2> operated by the handle N. The gearing is such that one turn of the handle effects a shift from one magazine to the next in the case of both the main and the auxiliary magazines. The handle N is connectible alternatively to the shafts M<5>, S<2>, to effect a shift of either set of magazines, by means of gears T, T<3>, Fig. 15, loosely mounted on the shafts and connected by an intermediate gear T<4>. Either of the gears can be locked to its shaft by means of splined clutch-members V<1>, V<3>, connected together by a lever V<4>, which is operated from the selecting-handle J. (3) The auxiliary magazines are provided with means for preventing the lifting of a magazine prior to its removal from raising an overlying magazine and permitting it to slide out of the machine. Each of the lower base-frames has a spring latch b<2>, Fig. 12, to engage the rear cross-bar b<3>, so that the magazine is prevented from sliding forwards when its front end is raised. The latch of a magazine which is to be removed is depressed by hand. Hooks b<6>, engaging in notches in the crossbar b<3>. prevent a magazine from being lifted by a protruding matrix when the magazine column is lowered.