Patent GB-191512529-A (GB)
Title: Improvements in or relating to Adding or like Machines.
Inventor: WADE HAROLD
Filed: 1915-08-31
Abstract: 12,529. Wade, H. [Burroughs Adding Machine Co.]. Aug. 31. Adding - apparatus; column - spacing. - In an adding-machine of the Burroughs type, such as is described in Specifications 17,126/93 and 21,268/97, in which it is required to print figures in parallel columns, means are provided for automatically returning the paper to the starting point of a column at will, and then shifting it laterally to begin a fresh column. The invention is shown as applied to a machine having line-spacing mechanism operated by a shaft 100, Fig. 1, as described in Specifications 1810/08, 16,800/08 and 712/09. The paper carriage 17 is constantly drawn toward the left of the machine by a band 18 wound round a drum 19, but is restrained by the engagement of adjustable stops 21, Fig. 2, with a shoulder 22<a> in a fixed plate 22, Fig. 3. Lateral shift of the carriage is effected by means of a lever 30 which is raised by a rocker 32 on depression of a special key. The lever 30 has an extension 30<a> underneath and behind the plate 22 so that when the stop 21 is disengaged from the shoulder 22<a> by the lever 30, it is caught, after slight movement, by a projection 30<b> on the extension 30<a> and retained until the key is released. Pivoted at 12<a>, Figs. 1, 2 and 6, to the usual cradle 12 carrying the roller platen 10 is a plate 13 having a stud 13<a> to support a toothed wheel 24, which gears with a pinion 10<b> on the platen 10. A sleeve 23, Fig. 5, and preferably a ball bearing 25 are interposed between the stud 13<a> and the wheel 24, and a coiled spring 26 is fixed to the sleeve and to a drum 24b on the wheel 24, the tension of the spring being regulated hy a ratchet 23<a> and an escapement pallet 27. Rotation of the platen 10 to advance the paper winds up the spring 26 which, when required, serves to return the paper to the starting point ; this reverse rotation is prevented by engagement of a V-toothed wheel 10<c> on the platen 10 with a pawl 27<a> pivoted at 27<b>. The wheel 10<c> is released, on lateral shift of the paper, by a link 28 slotted to embrace a pin 29 on an arm 29<a>, which is fixed to the rod 20 carrying the stops 21; when one of these stops is raised by the lever 30, the rod is rocked and the pawl 27<a> drawn down. Release of the pawl upon the full extent of advance of the platen is effected by a link 36 slotted to embrace a pin 27<d> on the pawl and hung from a lever 35 pivoted to the plate 13 at 35<b>. This lever is formed with a can-surface 35<d> adapted to be engaged by a lug 24<c> on the wheel 24 so as to raise the lever ; it is held in this raised position, during reverse rotation of the wheel 24, by the pressure on the npper edge of its V-shaped extremity 35<e>, of a roller 37<a> on a pivoted arm 37, which is drawn inwards by a spring 38. Towards the end of its reverse rotation, the lug 24<c> strikes an arm 39 pivoted to the plate 13 at 39<a> and connected by a spring 40 with a link 41, pivoted at 39<a> and at 35<f> to the lever 35. Swinging of the arm 39 by the lug 24<c> brings it into contact with a pin 41<a> on the link 41, which is thereby rocked and the lever 35 moved to its original position. This brings a projection 35<a> into the path of the lug 24<c> and stops reverse rotation, at the same time restoring the pawl 27<a> to engagement with the wheel 10<c>. A brake device for preventing too rapid return of the paper comprises a drum 60, Figs. 6 and 7, within which revolve centrifugal sectors 61 rotated by a spindle 64 geared to the wheel 24. Means for notifying when a predetermined number of operations has beeo performed comprise a bell 72 mounted on a sleeve 71, Fig. 5, adapted to slide on a stem 70 screwed into the stud 13<a> and pressed inwards by a spring 75. The bell is rotated with the wheel 24 by means of an arm 71<b> attached to the sleeve 71 so that it can be set to engage the teeth of the wheel 24 at any point, as determined by graduations on the bell in conjunction with a fixed index 13<c>. The bell-striker is of any suitable pattern and is operated by a fixed finger 13<g>. The paper may be returned by the operator at any time by pulling forward a hand-lever 43, Fig. 7, pivoted at 43<a> to the plate 13 and having a projection 43<c> which depresses the pawl 27<a>. The platen 10 is disengaged from the returning mechanism by rocking the plate 13 backwards about its pivot 12<a>, thus separating the wheels 10<b>, 24. This is accomplished by a spring 45, the plate 13 being held in its forward position by a latch 46 pivoted at 46<a> and drawn over a stud 12<d> on the cradle 12 by a spring 46<b>. This latch is litted, permitting the spring to operate, by a band-lever 47 having a stud 47<a> contacting with a projection 46<d> on the latch. An arm 48 moving with the plate 13 draws the pawl 27<a> downwards by means of a pin 48<b> working in a slot 27<e> in the pawl, and this also permits a spring 52 to draw forward a pivoted arm 51, so that a roller 50 on it bears on the wheel 10<c> and serves for line-spacing regulation when the platen 10 is turned by hand.