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    3.
    发明专利
    未知

    公开(公告)号：DE968905C

    公开(公告)日：1958-04-17

    申请号：DEI0002203

    申请日：1950-09-29

    Applicant: IBM DEUTSCHLAND

    Inventor： DODGE RONALD DEMPSTER

    IPC: B41J7/94 ,  E21B47/06 ,  F16C33/66

    Abstract: 660,263. Typewriters &c. INTERNATIONAL BUSINESS MACHINES CORPORATION. May 6, 1948 [June 5, 1947], No. 12492/48. Class 100 (iv). A power type action for a typewriter comprises a rotatable power roller 30 which is engaged by a cam 28 to actuate an associated type-bar 16, the blow imparted thereby being adjusted by means effecting disengagement of the cam 28 from the roller 30 at adjustable and differing points in the rotation of the cam by the roller 30. A key 10a, mounted on a lever 10, and pivoting about a pin 11 has a depending lug 10b which upon operation of the key, engages a release member 31 pivotally attached by a pin-and-slot connection 31b to a sub-lever 19. Release member 31 coacts with an extension 28c of the cam 28 which is pivoted at 19b to sublever 19 and moves it into contact with the power roller 30 which therefore continues to rotate the cam 28. The edge 28b of the cam is eccentric with the cam point 19b which is thus moved in an arcuate path to move the sublever 19 clockwise about a fulcrum 26a to effect, via link 20, movement of the typebar 16. The force applied to each type-bar 16 is individually adjustable by varying the point at which the cams 28 become disengaged from the power roller 30. This is effected by the contact of the extension 28c of the cam with a finger 34b of a combstrip 34 which is raised or lowered on a framework 33 by a screw adjustment 35. The clearance between the cam 28 and the power roller 30 is adjustable by longitudinal movement of stops 26 in slots in the frame 33, the stops being frictionally clamped in position by a resilient stop 37, within a channel-shaped bar 36. A spring 29 connecting the parts 19, 28 and the resiliency of the usual rubber covering of power roller 30 assist to produce a snappy disengagement with little slippage when the cam is forced off the power roller.

    5.
    发明专利
    未知

    公开(公告)号：DE1029836B

    公开(公告)日：1958-05-14

    申请号：DEI0012605

    申请日：1956-12-21

    Applicant: IBM DEUTSCHLAND

    Inventor： DODGE RONALD DEMPSTER ,  NORCROSS JOHN HERBERT

    IPC: B41J19/02

    Abstract: 843,819. Typewriters &c. INTERNATIONAL BUSINESS MACHINES CORPORATION. Dec. 28, 1956 [Dec. 30, 1955], No. 39530/56. Class 100(4) In a decelerating mechanism for use with a typewriter having a travelling carriage, when a tape drum 20, Fig. 1, rotates to drive the carriage for tabulation a hub 10 is rotated through a member 26 and a one-way spring clutch 28, and with it a governor 2 through gears 4, 6. Tab check lever 30, Fig. 3, is set by being pulled to the left by a spring 56 acting through members 58, 60, 62, 38, 36 when released from a retainer 54 by tab lever 50. As cab check lever 30 is driven back to its original position during the last part of the carriage travel, a cam 58 is driven anti-clockwise about a shaft 8 through the members 36, 38, 62, 60. The cam 58, Fig. 1, is mounted on a hub 64 which is connected via a one-way spring clutch 66 to the hub 10 which drives the governor 2 as previously described, thus decelerating the carriage. At the end of a carriage return movement, a bell crank 78, Fig. 4, is rocked anti-clockwise by a slide 72 pushed by a stop 70. A cam 100 is rotated anti-clockwise through members 98, 96, 86, and a lever 84 depressed by an ear 82. The cam 100, Fig. 1, rotates a hub 102 which rotates a hub 16 via a one-way spring clutch. The hub 16 drives the governor 2 via members 14, 10, 6 and 4. The decelerating force for carriage return is adjustable by altering the relative positions of levers 88, 86 by turning a screw 92.

    6.
    发明专利
    未知

    公开(公告)号：DE893653C

    公开(公告)日：1953-10-19

    申请号：DEI0002209

    申请日：1950-09-28

    Applicant: IBM DEUTSCHLAND

    Inventor： DODGE RONALD DEMPSTER

    IPC: B41J23/12

    Abstract: 655,492. Typewriters &c. INTERNATIONAL BUSINESS MACHINES CORPORATION. June 21, 1948, No. 16606. Convention date, June 25, 1947. [Class 100 (iv)] A case-shift mechanism comprises an accelerating power shift - mechanism initially moving a plate 20 positionable into either of two case-shift positions and operative means, e.g. a spring 38, for continuing movement of the plate with a controlled decelerating restraining motion by means of a buffer mechanism. The type-levers 13 are pivoted on a basket 10 movable upwardly into a lowercase position and downwardly into an upper-case position between adjustable non-metallic stops secured on the framework 14. Movement is imparted to the basket 10 by a linkage connected to a pair of brackets 18 secured to the basket 10 by two screws 18a spaced on either side of rounded lugs 18b so that adjustment between the basket and the positionable plate 20 may be effected. The bracket 18 is connected by a link 19 to the plate 20 which moves about a pivot 21 when engaged by either of lugs 33a or 33b of an actuator member 33 according to whether the basket is being moved into upper or lower-case position. Actuator 33 is pivoted at 30a to an arm 30 which is drawn forwardly when either of two case-shift keys are depressed or released. This is effected by a link 26 pivoted on key-lever 27R, Fig. 1, and which moves anti-clockwise a lever 24e, to release a pin 24c on a cam 24a allowing the cam to receive a small rotation from a downwardly-sprung arm 24h engaging a left-hand pin 20g on the cam 24a. The cam thus engages the power roller 23 and the camcarrying lever 24 is moved with an accelerating motion anticlockwise about pivot 25a, drawing link 29 leftwardly and swinging the arm 30 clockwise. The amount of movement of lever 24 is controlled by an adjustment 25b. At the same time an extension 27a of the shift-key elevates the actuator 33 by means of a link 35 to position the lug 33a behind a pin 20b on the rocking-plate 20, so that the resulting action of the two movements turns the plate. 20 anticlockwise. A toggle-spring 38 continues rotation of plate 20 to shift the type basket into upper-case position under the control of a buffer member 34 so that it slides into position with a decelerating restraining motion. The buffer 34 is pivoted at 30a coaxially with the actuator 33 and has projecting limbs 34b, 34c, a " peardrop " opening 34e, and a rectangular opening 34d; a toggle-spring 36 isconnected from a pivot 34a on the buffer to a pin 37 secured on the framework. The buffer 34 remains in the position shown in Fig. 1 until a pin 20c on the plate 20 engages the limb 34c at about the point where the highest part of the cam 24a engages the roller 23. At this point the toggle spring 38, assisted by the weight of the basket 10, tends to continue movement of the plate and cause pin 20c to move the buffer 34 upwardly and to the right and tends to rock lever 30 in an anti-clockwise direction. As, however, the lever 30 is connected by link 29 to the cam 24a the movement of the lever 30, buffer 34 and consequently plate 20 and basket 10 is controlled in its deceleration by the shape of the cam 24a. Further rotation of the cam is prevented by the trip-lever 24e engaging a pin 24d on the cam 24a, whereupon a second pin 24g is positioned below the sprung arm 24h so that a similar action takes place when the shift-key is next operated, Fig. 7, releasing it to normal position. In addition to moving the buffer 34 backwardly the plate 20 has a further pin 20d which engages inside the top surface of the pear opening 34e and together with a snapspring 36 moves the buffer clockwise so that the limb 34b is in position to engage the pin 20b and so effect a similar buffer action when the shift-key is released. Upon the release of a shift-key, lever 24e moves clockwise into the position shown on Fig. 1, this time disengaging pin 24d and starting a similar cam action to that started when the key was depressed. The key-lever also lowers link 35, causing actuator branch 33b to engage pin 20c on plate 20, moved clockwise by the leftward impulse of the actuator. A similar snap-over of the plate 20 by the toggle-spring 38 occurs and the typebasket returns to lower-case position under control of limb 34b of the buffer 34 and the cam mechanism. Shift-lock.-A shift-lock key 42 pivoted about a point in line with the shift-key axis 28 is pivotally connected at 43a with a latch 44 pivoted at 27c to the shift-key, and when depressed moves a hooked end 43b of the latch into an opening in a plate 44. A slight downward movement of either of the shift-keys, which are interconnected by a bail 39, turns the latch clockwise to release the hook 43b from the opening and the shift-key is restored by a spring 45.

    7.
    发明专利
    未知

    公开(公告)号：DE1234740B

    公开(公告)日：1967-02-23

    申请号：DEJ0021434

    申请日：1962-03-13

    Applicant: IBM

    Inventor： DODGE RONALD DEMPSTER ,  PERKINS NORWOOD KENNETH

    IPC: B41J1/60

    Abstract: 973,509. Securing together rotary parts. INTERNATIONAL BUSINESS MACHINES CORPORATION. Feb. 26, 1962 [March 22, 1961], No. 7424/62. Heading F2U. [Also in Division B6] A coupling between a driving pulley 42 and a shaft 36 connected to a rotatable and tiltable single element print head 1 comprises a tooth 104 pivoted on the shaft 36 for movement from a first position in which it engages both flanks of a radial groove 100 in the pulley 42 to a second position in which at least part of the tooth remains in the groove spaced from at least one flank thereof. The print head 1, of truncated spherical form and having rows and columns of type characters 2, is rotatably mounted in a block 6 which is tiltable about horizontal pins 24 in a yoke 23 secured to a support 26. The shaft 36 is connected to the head 1 by a universal joint comprising a slotted member 39 engaging pins 38, 40 respectively secured in the shaft and head. The block 6 is tiltable through bevel gear segments 31, 11, by a tubular shaft 30 carrying a driving pulley 32. The rotate and tilt pulleys 42, 32 are respectively rotated against springs 44, 34 by actuating tapes 43, 33. The support 26 is carried by trunnions 50 on a carrier 51 slidably mounted on a shaft 52 for longitudinally positioning the print head, and is upwardly rocked for the printing operation by the co-operative action of a cam (not shown) on a sleeve 67, keyed, but slidable, on the shaft 52, and of a follower 73 which is mounted on the support 26 by a pin 75 and on the carrier by a pin and slot (not shown). The rocking of the support 26 is limited by an arm end 113 secured thereon engaging an anvil 114 secured to the carrier. The positive rocking force applied to the support 26 is terminated before the print head strikes the platen, the print head continuing its movement by inertia. The arm 113 strikes the anvil 114 just before the print head contacts the platen so as to produce a whipping action for sharp print head engagement. The coupling groove 100 is wedge shaped and is formed in a downwardly extending portion 49 of the pulley 42. The tooth 104 is also wedgeshaped and is formed on a bell-crank lever which is pivoted on a bracket 103 of a collar 102 secured on the shaft 36 and is urged anticlockwise by a spring 106 to urge the tooth 104 to engage both flanks of the coupling groove 100 so as to rigidly connect the pulley 42 to the shaft 36. The bell-crank lever is rotated clockwise by a lever 117 one end of which is acted on by a lobe 122 of a cam 121 on the sleeve 67 and which is returned against a stop 124 by a spring 123. As shown, a ring 108 secured to the support 26 has formed therein wedge-shaped detent grooves 110, one for each peripheral column of type characters on the print head, and the tooth 104 is double-wedge-shaped so that when the bell-crank lever is rotated to partly disengage it from the groove 100 it engages one of the detent grooves 110 to precisely position the shaft 36 and correct for location inaccuracy due to wear or tape stretch. In Fig. 4 (not shown) the ring of detent grooves 110 is dispensed but when the bell-crank lever is rotated clockwise the inner edge of the tooth 104 is still not completely removed from the coupling groove 100 thereby ensuring re-entry of the tooth in the coupling groove as printing takes place. Rotational location of the print head 1 is, as shown, refined, to counteract wear and play in the universal joint 39, or, in Fig. 4 (not shown), solely effected, by an arm 18 pivoted at 17 on the block 6 and urged by a spring 20 into engagement with detent teeth 19 around the lower edge of the head. Tilt location of the print head is effected by an arm 57 of a lever 55 urged by a spring 60 to engage the arm 57 with radially extending detent teeth 15 on a plate 14 secured to the block 6. The arm 57 also extends into an arcuate slot 58 in the arm 18. The lever 55 is rotated clockwise by a face cam 68 on the sleeve 67 acting through levers 64, 62. In operation, the shaft 52 makes one revolution. At the beginning of the revolution the lever 55 is rotated clockwise so that the arm 57 is disengaged from the detent teeth 15 and acts against the lower edge of the slot 58 so as to disengage the arm 18 from the detent teeth 19. During this time the lever 117 is out of contact with the cam 121 so that the tooth 104 is in firm engagement with the coupling groove 100 of the pulley 42. In this position the tapes 33 and 43 are actuated to tilt and rotate the print head, and as they are moved the member 26 is. upwardly rocked and effects engagement of the lever 117 and the cam 121. The tape movement is completed before the arm 113 reaches the anvil and at this time the lobe 122 actuates the lever 117 to move the tooth 104 out of engagement with both flanks of the coupling groove 100 and, as shown, into engagement with one of the detent grooves 110 for rotational location of the shaft 36. As the tooth 104 enters the groove 110 the face cam 68 permits upward movement of the arm 57 to engage the detent teeth 15 for tilt location, and to permit the arm 18 to engage the detent teeth 19 for rotational location of the print head. As soon as the printing operation is completed the cam 121 permits spring return of the tooth 104 into firm reengagement with the groove 100 and at the same time the face cam 68 removes the arms 57, 18 from the teeth 15, 19.

    9.
    发明专利
    未知

    公开(公告)号：DE1059931B

    公开(公告)日：1959-06-25

    申请号：DEI0008367

    申请日：1954-03-06

    Applicant: IBM DEUTSCHLAND

    Inventor： DODGE RONALD DEMPSTER ,  PALMER LEON EDWARD

    IPC: B41J19/64 ,  G05D7/01

    Abstract: 754,003. Typewriters. INTERNATIONAL BUSINESS MACHINES CORPORATION. March 9, 1954 [March 12, 1953], No. 6819/54. Class 100 (4). A typewriter justifying mechanism for a differential letter-spacing typewriter, comprises an attachment 1 which is manually set after the typing of a trial line so that the spacing between words is expanded or condensed when the space-bar 110 is operated during the typing of the justified copy. The attachment comprises three cams 230, 231, 232 which are moved step-by-step back to a home position by an electromagnet 177 in response to the actuation of the space-bar 110 so that the cams close contacts to energize solenoids for operation of the differential letter-spacing mechanism. The power type-action, the mechanisms for operating tabulating and carriage-return operations, and the letter-space mechanisms are similar to those described in Specification 673,685. After the trial line has been typed the amount of justification necessary is noted from a scale 150 on the typewriter, and the number of words in the line is read from an attachment counter scale 167 which is actuated by the electromagnet 177, Fig. 11, in response to space-bar operations. The appropriate word-space number is then set to a figure on an " Expand " scale 244 equivalent to the expansion required. If the line is to be condensed, a mark 242 is set to the required figure on a " Condense " scale 246. Rotatably fixed with the dial 237 are the three cams 230, 231, 232 with raised portions which operate electrical contacts for the energization of the solenoids 96A, 96B, 96C which when actuated operate bails 52A, 52B and 52C, Fig. 3, to effect the differential letter-spacing escapement mechanism. Operation of the solenoids 96A, 96B, 96C causes 3, 4 or 5 units of space respectively, and, if none are operated, then 2 units of space is permitted by the escapement mechanism. Cam 230 has ten raised portions 230a, each equivalent to one unit of letter-space in width and corresponding in angular position to the word space scale. An eleventh portion 249 is used in conjunction with the condenser scale. Cams 231, 232 are used only in expanding the text and each carries ten raised portions, of widths progressively increasing, from one to ten units. The raised portions of all cams are offset from each other so that only one is effective to operate its electrical contacts at a time. If it is desired to expand the text, e.g. by twelve units, and there are ten word spaces in the line, the figure 10 on dial 237 is set to 12 on the expand scale 244. When the space-bar is operated contacts 126 close and operate the five-unit solenoid 96B because cam 232 is at this time closing contacts 269. Since at this time contacts 254 are closed, due to cam 230 being displaced, a solenoid 282 is energized, which, through a ratchet drive, steps all the cams one unit. At the second actuation of the spacebar, five units of space is again arranged but, at the third actuation, contacts 269 open and contacts 266 close to arrange for the operation of solenoid 96B and effect four units of space. This occurs for a total of eight word spaces so that the normal three-unit space between words has been expanded to accommodate the twelve extra units. When a reduction of space is necessary, the spaces between the words is reduced one unit starting from the first and continuing until the total reduction is obtained. If a line comprises more than ten word spaces the dial 237 is set to ten and justification is effective over the first ten word spaces. The cams and dials are restored during tabulating or carriage - return operations. Specification 655,492 also is referred to.

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