Patent GB-496563-A (GB)
Title: Improvements in or relating to line finding means for accounting and the like machines
IPC: B41J11/36
Filed: 1937-05-31
Abstract: 496,563. Typewriters &c. BURROUGHS ADDING MACHINE CO. May 31, 1937, No. 15073. Convention date, June 1, 1936. [Class 100 (iv)] Printing - line indicators.-A frontfeed shoot movable relatively to the platen to receive a sheet is provided with a pivoted line-finder which is movable from a position below and in front of the sheet to a position for so holding the sheet that the front is visible and adjustment with respect to the line-finder can be effected, means being provided for automatically restoring the line-finder when the platen or shoot is restored. The line-finder may be held in finding position by means of a latch, and to indicate exhaust of a journal-sheet on the platen, a sheet-feeler may be arranged to disable the latch. As applied to a Burroughs high-keyboard machine the platen-carriage 16 shown in Figs. 3 and 5 is provided, as described in Specification 382,613, with a rocking frame 11 for raising the platen 10 into open-throat position, and a front-feed table or shoot 13 which is mounted on pivots 15 and drops forwards when the platen is raised. The table is now provided with a line-finder 31 consisting of a bar formed with arms 33 which are mounted on pivots 34 and are provided with finger-pieces 36. The line-finder is held yieldingly in normal position by co-operation of a pin thereon with a spring-urged lever 81. When, as shown in the Figures, the parts are in open-throat position, a sheet 14 is passed over the table and line-finder, between the platen and feed-rollers 12, and under an apron 60. On pulling forwards the fingerpieces, the sheet is raised into the vertical position by means of the line-finder, and is then adjusted to bring the last-printed line into alignment with the line-finder. The line-finder is formed with a notch for exposing the subjacent part of the sheet and thereby ensuring that the last-printed line is employed for line-finding. When the parts are returned to normal position, the line below the lastprinted line is in register with the printing line. A latch 41 for holding the line-finder in raised position is pivoted on a pin 42 and is formed with a T-slot 40 co-operating with a pin 38 on one of the arms 33. A lever 44, abutting on a stud 54 on a lever 52, is connected by springs 43, 45 to the pin 38 and a pin 46 on the latch. The movements of the lever 44 are limited by a hole 48 and pin 49. When the line-finder is raised, the pin 38 enters the top of the slot 40, the spring 45 moves the latch towards the left, and the line-finder is retained. When the platen is returned to normal position the line-finder is automatically returned. For this purpose, the frame 11 is provided with a rod 51 for moving the lever 52 and thereby permitting the spring 43 to move the lever 44. a notch 55 therein moving the latch to permit of the spring 43 returning the line-finder. To return the line-finder without returning the platen for instance when it is desired to withdraw a wrong sheet, the latch is moved by means of a finger-piece 50, The latch is ineffective if the line-finder is raised when the platen is in normal position. When the line-finder is employed for a front-fed journal-sheet 62, the apron 60 is depressed by means of a fingerlever 66 and the journal-sheet, after being passed over the table 13 and apron 60, is aligned with reference to the line-finder in the above-described manner. The apron is then returned and the top of the journalsheet is passed underneath a blade 73 on the lever 52, and a feed-roller 74. The fingerlever 66 co-operates with a stud 68 on a loose arm 69 mounted on the apron-shaft 61 and connected by a spring 72 to an arm 71 fast on the shaft. When the line-finder is employed for a rear-fed journal-sheet or web, the lever 52 is moved to the right by means of a fingerpiece 75 to withdraw the blade 73, the apron 60 is depressed by means of the finger-lever 66, and the line-finder is depressed slightly below its normal position by means of one of the finger-pieces 36. The journal-sheet is then passed over the apron, line-finder, and table, the line-finder is raised, and the journalsheet is aligned by means of the line-finder in the above-described manner. The linefinder is retained in raised position by the latch, the spring 43 causing the lever 44 to move the latch towards the right when the pin 38 enters the top of the slot 40. The fingerpiece 75 can slide on the lever 52 and is formed with a hook 79 for engaging the rod 51, release being effected by depressing the finger-piece. Exhaust of paper, indicating.-When the journal-sheet 62 has been filled a feeler 86 controls means for preventing the line-finder 31 from being latched in raised position the operator being thereby warned that a new journal-sheet is required. The feeler is mounted on a shaft 87 and engages a lever 90 having a pin 92 for engaging a notch 93 in the latch 41. A spring 95 urges the feeler towards the apron 60 and into engagement with the journalsheet. When the journal-sheet has passed the feeler, the feeler rocks into a slot in the apron, the lever 90 is raised and the pin 92 holds the latch in inoperative position. To permit of latching the line-finder after the journal-sheet has passed the feeler, the feeler and the lever 90 can be restored by means of a finger-lever 96 having a stud 98 for engaging the lever. For raising the feeler to permit insertion of a new journal-sheet, the fingerlever 66 for depressing the apron 60 is arranged to rock a cam 100 co-operating with the feeler.