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公开(公告)号：SE306543B
公开(公告)日：1968-12-02
申请号：SE679263
申请日：1963-06-19
Applicant: IBM
Inventor： O DANIEL J , PALMER L
Abstract: 982,774. Ink-ribbon mechanisms. INTERNATIONAL BUSINESS MACHINES CORPORATION. June 24, 1963 [June 26, 1962], No. 24955/63. Heading B6F. An inked ribbon feed mechanism for a synthetic plastic or fabric ink ribbon comprises a ribbon guide 156, Fig. 2, movable in the plane of the ribbon in a direction transverse to the longitudinal feed to position the ribbon for print action by a print element, a rod 61 movable in a slot 60 of a pivotal member 57 on each print action to vary the amount of transverse movement to the guide 156 and a means including a member 91, Fig. 1, operated by cam 78 via a pin 95 and an end portion 94 of the member 91, after a predetermined number of print actions, to advance the ribbon a predetermined distance longitudinally. Vibration mechanism. (a) Successive strokes variable; ink ribbon guides. A synthetic plastic ink ribbon is used once only and the ribbon is displaced transversely to twenty-two different .positions relative to the type elements before it is advanced longitudinally. The ink ribbon is stretched between guides 156, Fig. 2, which are attached to upper and lower arms 55, 42 the latter being lifted during each print action by a rod 61 moving slidably in a slot 60 of a cam-follower 57 pivotally attached at 58 and engaging a cam 59 on a shaft 17, which executes one revolution for each print action. The successive raising of the guides 156 up and down vertically is determined by the position of the rod in the slot 60, maximum lift corresponding to the rod being in the extreme left-hand position, in Fig. 2, and minimum lift corresponding to the rod overlying the pivot 58. Sliding movement to the rod 61 is imparted through a lever 64, pivoting about a pin 65, Fig. 1, by an end 75 of a lever 74, which engages a pin 76 on the lever 64. The lever 74, which is pivotally mounted on the pin 65 is provided with a camfollower 77 co-operating with a cam 78 fast with a ratchet wheel 80, which receives incremental movements by a dog 96 on a lever 97, Figs. 2 and 3, having a cam-follower 99 engaging a cam 20. The ratchet wheel is driven one tooth on each rotation of the shaft 17 to thereby displace the cam 78 and end portion 75 accordingly, the latter either positively displacing the rod 61 towards maximum lift or permitting the rod to swing under the action of a spring 62 to minimum lift. When the cam 78 reaches a position in which a stud 95, Fig. 1, thereon engages the end portion 94 of the member 91 pivoting about 92, the member is pivoted to engage its hooked arm 90, Fig. 3, by the tail 88 of a latching pawl 35 to raise the pawl sufficiently for a projection 37 of a member 21 to engage projection 38 of the pawl 35. Subsequent movement of the cam 20 displaces the member 21 which rocks a feed pawl 5, Fig. 4, to drive a ratchet sheet 2 for the ribbon spool a distance of one tooth space. As the stud 95 slides off the end portion 94 the member 91 rocks to release the pawl 35, whose shoulder 39 engages projection 37 of the member 21 to hold it away from the cam 20 until a further rotation of the cam 78 is completed. (b) Successive strokes constant; shifts to expose writing.-When using a fabric ink ribbon the variable stroke vibrator movement is disabled by clockwise movement of a lever 85, Fig. 1, resulting in disconnecting of the cam-follower 77 and end portion 75 of the lever 74 from the cam 78 and pin 76 and also in the engagement of an arm 101 of a portion 112 on the member 91, which is pivoted clockwise to remove end portion 94 out of engagement with the pin 95 and latch the pawl 35, Fig. 3, which is pivoted clockwise by the hooked arm 90 on the member 91 engaging the tail 88 of the pawl. The sliding member 21 is now free to engage the cam 20, which displaces the member on rotation once every print action to rock the pawl 5, Fig. 4, and drive one or the other of the ratchet wheels 1 or 2 two tooth spaces. The ribbon may be selectively raised or lowered manually by operation of a handle 70, Figs. 1 and 2, on a lever 68 having a pin 71, which co-operates with three detents 66 on the lever 64, the detents corresponding to high, medium and low ribbon lift, the ribbon being lowered each time to expose the typing. Automatic ink-ribbon reversal.-The fabric ink ribbon is reversed automatically, when the ink ribbon has been wound completely on to the driven spool by an arm 7, Fig. 4, on a member 6 positioned in front of one of two upturned flanges 8 on a pivoted toggle member 10, which has a downturned flange 114 connected by a toggle spring 11 to the pawl 5. As the member 6 is moved rearwardly, the toggle member 10 is pivoted and the spring passes overcentre to swing the pawl 5 into engagement with the other ratchet wheel. Stencil cutting.-When the typewriter is being used to cut stencil the member 21, Fig. 3, is held free of the cam by a pawl 36 whose projection 40 engages the projection 37 of the member 21 so that no feeding of the ribbon takes place. The lever 74 is disabled as described under vibrator mechanism with successive strokes constant, the arm 68, Fig. 1, is swung into an extreme counterclockwise position so that the rod 61, Fig. 2, is displaced beyond the pivot 58, to the extreme right, and a cam portion 116, Figs. 1 and 3, on the arm 68, moves away from a tail-piece 117 on the latching pawl 36 to enable it to drop into its operative position. Changing ink ribbons.-When changing from one type of ink ribbon to another, i.e. from a synthetic plastic one to a fabric one it is desirable that the member 21, Fig. 3, be released from the pawls 35, 36 so that the pawl 5 is free of the ratchet wheels that it may be moved transversely into driving relationship with any one of the ratchet wheels 1 or 2, Fig. 4. For lifting of the pawls 35, 36 when the ribbons are being changed the pawls are provided with hooked portions 120, 121, Fig. 3, respectively, engageable by a flange 44 when the ribbon guides 156, Fig. 2, and lift arms 42, 55 are raised by manual actuation of a member 47, which displaces a bifurcated arm 46 against a finger 45. A stop-pin 53 limits the swinging of the member 47 in either direction. Specification 883,818 is referred to.
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Patent Agency Ranking
公开(公告)号：SE315605B
公开(公告)日：1969-10-06
申请号：SE118465
申请日：1965-01-29
Applicant: IBM
Inventor： O DANIEL J , PALMER L
Abstract: 1,026,659. Typewriters. INTERNATIONAL BUSINESS MACHINES CORPORATION. Dec. 21, 1964 [Jan. 30, 1964], No. 51761/64. Heading B6F. Machines with types upon spherical surfaces; type-selecting mechanisms; power assisted type actions.-This subject-matter is identical with that in Specification 1,026,658. Wear compensation apparatus.-The wear compensating apparatus 10, Fig. 2, is designed to compensate for any wear in the rotary character selection mechanism, e.g. dilation of tape 26 and becomes effective when the type head 11 is rotated clockwise by five units and the case shift mechanism has not been actuated. The apparatus includes a dual pawl clutch means comprising a pair of pawls 57, 58, Fig. 3, mounted on arms 61 of an annular hub 62 rigidly attached to the type head spindle 12 and normally engaging a toothed flange 55 on a pulley 17 through the intermediary of a spring 66 to provide a rigid drive connection between the pulley 17 and spindle 12. The type head 11 moves counterclockwise under the influence of tape 26 or clockwise under the influence of spiral spring 21. When wear has taken place and the spiral spring 21, Fig. 4, has rotated the type head 11 five units in a clockwise direction, in response to the depression of a key, a stud 68 on the pawl 58 engages a stop plate 67 to pivot the pawl 58 out of engagement with teeth 56 on the flange 55 so as to disengage the pulley 17 from the type head 11, which remains in its proper typing position, but the pulley continues to rotate clockwise under the bias exerted by the spiral spring 21 until all slack in the tape has been taken up. As the rotary selection mechanism is de-energized and the pulley begins to rotate counterclockwise to its home position the pawl 58 drops into the teeth 56 on the pulley 17 at the adjusted position.
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公开(公告)号：SE341595B
公开(公告)日：1972-01-10
申请号：SE188969
申请日：1969-02-12
Applicant: IBM
Inventor： PALMER L
Abstract: 1,216,173. Typewriters. INTERNATIONAL BUSINESS MACHINES CORP. 23 Jan., 1969 [14 Feb., 1968], No. 3829/69. Heading B6F. A typewriter includes a key 65 which when depressed acts, on subsequent depression of a character key 41, to effect printing of the selected character without an associated letter space movement, followed by automatic printing of a predetermined character such as underscore and a subsequent letter space movement. The typewriter comprises a single element printing head 11 actuated on depression of a character key 41 by a mechanism (not shown) acted on by lugs 43a during leftward motion of an interposer 43 under the impulse of a filter shaft 51. The printing head 11 is advanced in the letter space direction by an excapement mechanism through a linkage 55, a lever 57 and a torque bar 59. On depression of the key 65, the key is latched in place by a slot 73 engaging a frame 71 owing to a spring 79, a pin 81 thereby acting to depress a bar 87 into a position such that a step 91 thereof is in the path of a blade 53 of the filter shaft 51. On depression of the character key 41, rotation of the filter shaft is initiated through a bail 45. The selected character is impressed, and simultaneously the bar 87 is driven leftward to rotate a ratchet-wheel 97 and coupled cam 109 so that a follower 113 is urged to the right and the escapement linkage is broken by displacement of the lever 57 away from engagement with the bar 59 by engagement of an end 125 of the cam follower 113 with a portion 127 of the lever 57. The rotation of the cam 109 also acts to draw a follower 129 downwardly, a portion 141 thereof depressing a underscore interposer 63. A second cycle of the filter shaft 51 is thereby initiated, causing impression of an underscore. Simultaneously, the bar 87 is again impelled to the left to rotate the ratchet-wheel 97 and cam 109 further. The follower 113 is thereby drawn to the left by a spring 121, to reconnect the lever 57 with the bar 59 and permit the operation of the letterspacing escapement mechanism. The follower 129 returns to its inoperative position with the underscore interposer 63. The key 65 remains latched in its operative position for continuous underscoring until manually released. A ball interlock 20 is provided to prevent actuation of a second key before a printing and underscoring cycle is completed.
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公开(公告)号：SE326970B
公开(公告)日：1970-08-10
申请号：SE54667
申请日：1967-01-13
Applicant: IBM
Inventor： PALMER L , SCHAEFER J , YOUNG R
Abstract: 1,154,111. Typewriters &c. INTERNATIONAL BUSINESS MACHINES CORP. 3 Jan., 1967 [14 Jan., 1966], No. 192/67. Heading B6F. Machines with types on spherical surfaces; power assisted type actions; permutation typeselecting mechanisms.-A typewriter having a spherical type head 72 mounted on a traversible carriage (not shown) is provided with a character selection mechanism comprising a stack of slides 60, and a plurality of probe members 50 one for each character key lever 20 the probe members being provided with a pair of opposed edges 51, 52 to probe coded slots 61, 62 disposed along opposite edges of the slides and associated with upper or lower case characters, respectively. Depression of a key lever 20 causes a primary dobber 26 to rock downwardly a control link 40 whose lug 47 depresses its associated probe member 50 whereby the latter is biased by a leaf spring 15 to move in one or otherdirection along line L to probe the respective coded slots 61, 62. Probe member is latched in its position by a lug 54, 58 which enters an aperture 35 in a bracket 34. Depression of probe member 50 enables a one-revolution clutch 13 through link 18 and latch 14, whereby a cam controlled slide mechanism 64 releases the slides 60 for movement under bias of springs 63 to rock character selecting latches 11. Slides 60 are then restored by the mechanism 64 and the probe member 50 is restored by the link 40 which is moved forwardly by a leaf spring 43 attached to a bail 42 which is reciprocated by a cam 44 and then upwardly by a leaf spring 46, whereby the arm 59 of probe member 50 is raised when a lever 45 has moved the probe member to release its lug 54 or the link 40, during its forward movement has engaged the arm 59 to release its lug 58 from engagement with the aperture 35. Closing electric circuits for printing.-The slides 60 may be provided with spurs to close electrical contacts 69 during their sliding movement. Case-shift mechanism ; key sections.-Coded slots 61, 62 are associated with upper and lower case, respectively, and the probe members 50 are biased to probe the slots by leaf springs 15 which are displaced by link 16 under control of a cam 17 which is actuated by a case shift mechanism 12 on depression of a case-shift key 22. Key levers; repeat power action prevention; repeated power action.-The key levers 20 are provided with slots 23 at one end to mount them pivotally on a bracket 31 and with hooks 25 at the other end for engagement with a rod 33 to limit their upward movement. Repeat power action due to protracted key depression is prevented by limiting the downward movement of the key lever 20 by causing a lug 28 to abut a stationary frame 38 and providing the primary dobber 26 with a surface 27 which arrests the restoring movement of the link 40. Repeated power action by certain keys is possible by replacing the lug 28 by a spring 28 1 so that the key lever may be depressed to a greater extent and by providing the key lever 20 with a secondary dobber 29 which engages the upper edge 48 of restored link 40 and keeps it in a depressed position in which the probe member 50 is probing repeatedly its associated coded slot 61, 62. Key touch regulating arrangements.-Key touch is regulated by varying the width of key lever restoring leaf springs 80 which engage lugs 81 on the key levers 20, whereby entire keyboard control is effected by an operator touch control lever 82 articulated to a crank arm 83. Key switches.-Mis-operation of fast sequentially operated links 40 is prevented by a ball interlock mechanism 41 which permits only one link to be inserted at any one time. Release of the links 40 is effected early in the cycle by a bail 42 actuated by a cam 44 as so to permit the insertion of a second link thereinto. The bail 42 carries a number of leaf springs 43, one for each link, which engage the respective link and move it out of the ball interlock a restoring spring 46 urging the link 40 upwardly into its starting position. Variable impression arrangements.-Stack of slides 60 is associated with a further slide 76 coupled to a cable 75 which is attached to a slidable yoke to displace a roller 74, mounted in a cradle 71, into contact with one of a number of cams 73 which effect angular displacement of the cradle articulated to the spherical type head 72.
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公开(公告)号：DK111689B
公开(公告)日：1968-09-30
申请号：DK163761
申请日：1961-04-21
Applicant: IBM
Abstract: 925,011. Typewriters. INTERNATIONAL BUSINESS MACHINES CORPORATION. April 26, 1961 [May 2, 1960], No. 15054/61. Class 100 (4). [Also in Group XXIV] In a typewriter, e.g. as described in Specification 873,920, wherein a printing head 4 with a part-spherical surface is rotated against spring action from an initial position by a band 3 to position a type to be printed, and the band is operated by a pulley 27 on a lever 1 connected by a link 2 to mechanism which controls the movement of the lever 1, the lever is constructed so that compensation is automatically effected for inaccuracy in the positioning of the type due to wear in the parts. The lever 1 includes arms 35 pivoted about a shaft 25 mounted on a bracket 54, and carrying the pulley 27 at their upper end by means of a bolt 47, Fig. 3. On the head of the bolt 47 is an eccentric pin 50 which, at the end of clockwise movement of the arms 35 first engages a leaf-spring 51, Fig. 4 (not shown), on the frame 52 and then abuts against the frame, such movement causing rotation of the head 4 to the fifth letter of a row thereon, i.e. a distance of five units. Mounted on the shaft 25 between the arms 35 is a member 56, Fig. 3, with arms 60, 63, 66 and an eccentric hub 57, a spring 64 connecting the arm 63 to a stud 38 on the arms 35 so that the arm 60 is held against an eccentrically-mounted stop 61 on the arms 35. The arm 66 engages the bracket 54 in certain positions of the mechanism as referred to later. Pivoted on the hub 57 is a two-part lever, one part 76 having a flanged hole 70 fitting on the hub and an arm 77 connected by a spring 78 to the stud 38, and the other part 72 having a slot 71 fitting over the flange 70 and being connected to the part 76 by a bolt 74 passing through a narrow lower part 73 of the slot 71 into a hole 75 in the part 76. The lever 72, 76, which is subject to the action of a spring 87, Fig. 1, is adjustable in length by means of the bolt-and-slot arrangement 73, 74, and is pivoted at its lower end to the link 2 connected to mechanism controlling the movement of the link 2 and lever 1 so as to position the type face required to be printed. A roller 82 rides freely in slots 80 in the arms 35 and, before any wear in the parts occurs, is held at the top of the slot by an inclined surface 86 on an arm 68 of the lever part 76. Initially the length of the lever 72, 76 and the position of the eccentric pin 50 so adjusted that the requisite movement of the type-head is attained. Just after four units of such movement of the typehead, the pin 50 engages the leaf-spring 51, Fig. 4 (not shown), and the arm 66 engages the bracket 54 so that the lever 72, 76 now rotates about the centre of eccentric hub 57, i.e. its lower arm is shortened and its upper arm lengthened. The fifth position of movement is always correctly determined by the engagement of the eccentric pin 50 with the frame 52, but if wear has occurred, this engagement takes place before the link 2 has completed its movement. Further movement of the link then causes the lever 72, 76 to move clockwise relatively to the arms 35 thus allowing the roller 82 to drop in the slot 80 a distance corresponding to such movement, and so setting the lever in relation to the arms to compensate for the wear. When sufficient wear to cause the roller to drop to the bottom of the slot has occurred, manual resetting has to be effected.
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