Patent GB-545424-A (GB)
Title: Improvements in or relating to typographical composing machines
IPC: B41B11/06
Filed: 1940-11-21
Abstract: 545,424. Type-bar-making machines. MERGENTHALER LINOTYPE CO. Nov. 21, 1940, No. 16739. Convention date, Dec. 27, 1939. [Class 100 (iii)] Magazines; driving-mechanism.- Pneumatically operated mechanism is provided for raising and lowering the magazines under the control of a manually adjustable selecting- device. The lowermost base-frame of the column of magazines is supported on a shift-frame F, Fig. 1, comprising vertical rear members and inclined front members F<SP>3</SP>, flanges on the front members being engaged between antifriction rollers C<SP>1</SP>. The magazines are balanced by springs attached to straps, which pass around and are secured to drums G<SP>3</SP> on a shaft G having a rack-andpinion connection with the inclinec members F' of the shift-frame. The drums are of spiral form, so that their effective radius decreases as the springs are extended. One spring is provided for each magazine, and springs can be added or removed as the number of magazines is varied The shift-frame is raised and lowered by a pneumatic cylinder H, Fig. 10 having means for admitting compressed air above or below the piston. The speed at which the shift-frame moves is controlled by a dashpot comprising a hydraulic cylinder J having its piston-rod J' connected to the shift-frame. The cylinder J is connected by passages J<SP>5</SP>, J<SP>8</SP> below and above the piston with a passageway J<SP>6</SP>, into which the fluid is displaced as the dashpo piston moves. To compensate for the reduction in the quantity of fluid displaced by the piston-rod J<SP>4</SP> as the piston ascends, additiona fluid is permitted to enter the passage way J<SP>6</SP> from a reservoir J<SP>10</SP> througt a non-return valve J<SP>12</SP>. Passages are provided for allowing fluid to bleed back into the reservoir as the piston-rod descends. In order to slow up the movement of the shift frame as a magazine approaches the operative position, part of the passage J<SP>8</SP> leading to the passageway J<SP>6</SP> is formed in a sliding rod J<SP>14</SP>, by movement of which the size of the passage can be reduced. The rod J<SP>14</SP> is connected to a lever J<SP>15</SP>, a finger J<SP>17</SP> on which bears against a bar F<SP>9</SP> attached to the shift-frame and containing notches F<SP>10</SP> corresponding to the operative positions of the magazines. The shift-frame is locked with a magazine in operative position by sliding bolts K, Fig. 12, which are adapted to enter notches F" in the shift-frame under the action of levers K<SP>5</SP> and a spring K<SP>10</SP>. The bolts are withdrawn by the piston Kt of an aircylinder K<SP>2</SP>. The shifting of the magazines is controlled by a single handle O<SP>5</SP>, Figs. 1 and 3 which can rock in two directions at right-angles to each other, and is mounted on a slide O<SP>16</SP> movable in a casing O<SP>1</SP>. The slide is connected by rackmechanism O<SP>22</SP>, O<SP>23</SP> to the shift-frame, so as to move therewith. The handle O<SP>4</SP> projects through a slot O<SP>2</SP> in the casing O<SP>1</SP>, and normally rests in one of a series of notches O<SP>3</SP>, depending on the magazine in operative position. When rocked out of the notch, the handle opens a valve, which admits air to the cylinder K<SP>2</SP>, Fig. 12, so as to withdraw the magazine locking-bolts K. At the same time, matrix-detectors are moved across the distributerbar and the assembler-entrance. The handle O<SP>4</SP> is then rocked either upwards or downwards, according to the direction in which the magazines are to move. This movement rocks a bail O<SP>20</SP> in one or the other direction and operates a valve M', which admits air either above or below the piston of the magazineshifting cylinder H, Fig. 10. As the shift-frame moves up or down, the slide carrying the handle O<SP>4</SP> moves in a corresponding manner in the casing O<SP>2</SP>. When the handle reaches the notch O<SP>3</SP> representing the desired magazine, it is guided into the notch, whereby the air supply to the cylinder K<SP>2</SP>, Fig. 12, is cut off, and the locking-bolts K are placed under the influence of the spring K<SP>10</SP>. Continued movement of the magazines rocks the handle into the vertical position, which causes the valve Mt to cut off the pressure from the shifting-cylinder, so that the magazine column comes to rest with the new magazine in position. The locking-bolts are then seated in the notches F" by the spring K<SP>10</SP>. Specification 532,723 is referred to.