US3481444A - Selective blocking means for key machine - Google Patents

Selective blocking means for key machine Download PDF

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Publication number
US3481444A
US3481444A US677531A US3481444DA US3481444A US 3481444 A US3481444 A US 3481444A US 677531 A US677531 A US 677531A US 3481444D A US3481444D A US 3481444DA US 3481444 A US3481444 A US 3481444A
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US
United States
Prior art keywords
blocking
key
levers
blocking means
frame
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US677531A
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English (en)
Inventor
Wolfgang M Mittmann
Gert Breidenbach
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INTERTIP AG
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INTERTIP AG
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Publication date
Application filed by INTERTIP AG filed Critical INTERTIP AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J5/00—Devices or arrangements for controlling character selection
    • B41J5/08—Character or syllable selected by means of keys or keyboards of the typewriter type
    • B41J5/18—Locks
    • B41J5/22—Interlocks between keys, e.g. without detent arrangements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B13/00—Teaching typing
    • G09B13/04—Devices used in association with a real typewriter, teleprinter, or the like

Definitions

  • the apparatus of the invention for mounting on a key operated machine for selectively blocking actuation of at least one key of said key operated machine when mounted therein is comprised of a control means pivotally mounted on a horizontal axis, said control means being element secured to said frame and cooperating with said positioned under the key levers and being provided with bearing means, said control means being mounted in a frame, said frame having means for attachment to said key operated machine, said control means being pivotable between a plurality of positions and being provided with means to fix it in a desired position, a plurality of individual blocking means provided with bearing means and being pivotably mounted on a horizontal axis, said blocking means being located between said key levers and said control means such that an actuated key lever can contact one of said blocking means and move said blocking means into engagement with said control means in at least one of the positions of said control means, a dog element secured to said frame and cooperating with said blocking means to serve as a limit for the movement of said blocking means, at least one of said blocking means and said dog element being flexible to the
  • the individual blocking means are preferably made of elastic synthetic material so that the levers are flexible and can avoid one another at any incorrect setting.
  • the inner guiding edge of the control means which is preferably a control bar is provided with a groove while the outer guiding edge thereof is flattened.
  • the blocking levers are also provided with a lug so that they cannot be depressed in the pre-set position whereby typing in this pre-set position is no longer possible.
  • the blocking levers are provided with a stud which cooperates with elastic dogs on the frame whereby a certain pressure has to be overcome when the keys are depressed.
  • the blocking levers are disposed in slots arranged in the frame, and the axis of the control bar and of the blocking levers are secured with supporting metal sheets in bridging spaces.
  • the device can be provided with a guide profile and clamping blocks at both sides which aid the assembly of the device in a typewriter.
  • the position of the blocking levers is fixedly secured by spacers arranged on the blocking lever axis between the blocking levers and forced together by springs.
  • the guide bar is held in the desired position by a ball under spring pressure in engagement with recesses in the frame members for each desired position.
  • FIG. 1 is a plan view of one embodiment of the blocking device of the invention.
  • FIG. 2 is an expanded partial plan view of the bottom of the embodiment of FIG. 1.
  • FIGS. 3 and 4 are cross-sectional views of the embodiment of FIG. 1, taken along lines III-III and IVIV, respectively.
  • FIGS. 5 and 6 are cross-sectional views of the embodiment of FIG. 1, taken along lines VV and VIVI, respectively.
  • FIG. 7 is an enlarged cross-sectional view of the control device of the embodiment of FIG. 1.
  • FIGS. 7a, 7b and 7c illustrate the dilferent phases of movement of the locking means and the control bar.
  • FIG. 8 is a plan view of another embodiment of an elastic blocking means suitable for use in FIG. 1.
  • FIG. 9 illustrates the cooperation of an individual blocking means cooperating with a dog disposed on the frame.
  • FIGS. 10a, 10b show different embodiments of the dog of FIG. 9.
  • FIG. 11 is a plan view from the bottom of a preferred embodiment of the invention having spacing means and ball fixing means.
  • FIG. 12 is a cross-sectional view of FIG. 11, taken along the line II.
  • the blocking device of the invention is comprised of frame 1 with control bar 2 mounted on an axis 11 disposed in frame 1.
  • the blocking levers 3 (FIG. 2) are arranged in slots 4 recessed in the frame 1 and are mounted on an axis 5 disposed in frame 1.
  • Bridging space 6 is provided with a supporting metal sheet 8 while bridging spaces 7 are not provided with said metal sheets.
  • a support metal sheet 9 is disposed in one of recesses 4 in which axis 5 is externally journaled at both ends and several of said support sheets 9 may be arranged in different recesses 4.
  • the blocking levers 3 are held in recesses 4 by means of leaf-type springs 10 also arranged in recesses 4 and interspersed by axis 5 against one side of recess 4 to create friction between the side and the blocking lever 3.
  • Each blocking lever 3 is provided with a leaf-type spring 10 which springs may be replaced with coil springs, elastic rubber discs or the like.
  • Blocking lever 3 is elastic and may be made of a sufficiently flexible material or may be flexibly constructed as in FIG. 8 where two parts of the blocking lever are connected by spring 12.
  • the blocking lever 3 is provided with a projection 20 which cooperates with guide edge 21 of control bar 2 (see FIG. 7) so that blocking lever 3 cannot be pressed down to any extent and, therefore, typing in this preset position is impossible.
  • the control bar 2 is also provided with an attenuation 22 and groove 23.
  • the attenuaton 22 acts to press an incompletely depressed blocking lever 3 back into its locked position so that the blocking levers 3 cannot be bent by operation of control bar 2.
  • the blocking levers 3 are secured with blunt stud 24 in blocked position in groove 23 of the control bar 2.
  • Control bar 2 is mounted on axis 11 and segments 2a and 2b almost completely envelop axis 11 except for a small space opposite bar 2 (see FIGS 5, 6 and 7).
  • the axis 11 is disposed in the frame at either end and between these ends in bridging spaces 6, 7 with bridging space 6 being provided with a supporting metal sheet 8 made from wear-resistant material.
  • Each blocking lever 3 has, in addition, a lug or stud 15 which cooperates with a corresponding stud 14 of a dog 13, which dogs are arranged in an appropriate man ner on frame 1 (see FIG. 9).
  • the dogs may be, for example, pierced and seated on a central shaft, which is fixedly secured on frame 1. If, due to increasing pressure on the blocking lever, the pressure point between the studs 14, 15 is exceeded, the stud 14 of the dog 13 will elastically recede before the stud 15 of the blocking lever 3, so that the stud 15 of the blocking lever 3 becomes engaged below the stud of the dog 13.
  • a spring 16 which is attached to the dog 13 by means of screws or the like can be used or the dog 13 can be constructed of plastic whereby an elastic lug 17 may be castmolded directly onto the dog 13.
  • a bolt 18 stressed by a Spring 19, which spring 19 is secured, for example, with screws to the dog 13 can be used (see FIGS. 10a, 10b and 100).
  • the frame 1 is provided on both sides with a guide profile 25 (FIG. 3) in which a clamp block 27 seated on a bolt 26 provided with a coil 31 is disposed. This clamp block is provided with a stud 29 which can engage the guide profile 25. With guide profile 25 and the clamp blocks 27 the device of the invention can be secured in the understructure 30 of a typewriter by tightening the nuts 32.
  • spacers 34 are arranged on axis between blocking levers 3, which are so bulky that one blocking lever 3 is in opposite relation to each key lever 33.
  • the spacers 34 are prevented from turning by a profile bar 35.
  • a guide bar 2 is mounted on axis 11 which can be turned into three different position A, B and C by means of a lever 38.
  • the guide bar 2 with guide edges 2c is locked in the positions A, B and C by a spring-loaded ball 39 which engages recesses 40 in a frame wall 41.
  • the blocking lever 3 has inverted edges 3a, 3b and 3c and the blocking levers 3 and the spacers 34 are held in the axial direction under pressure by spring 42, so that the blocking levers 3 are held in any position desired by the rolling friction occurring on their lateral faces.
  • the device can also be secured to typewriters of any known make with the aid of clips 43.
  • This embodiment operates in the following manner: When guide bar 2 is rotated out of the mid-position B into position A (dotted line, FIG. 12), the blocking levers 3 are swung into position A closely below the unblocked key lever 33. In this position of the blocking lever 3, all of the keys 33 are blocked since upon being depressed they abut against the back of the blocking levers 3.
  • the blocking levers 3 retain position A as they are pressed together by the spring 42 in the axial direction, thereby causing frictional forces between their lateral faces and the lateral faces of the spacers 34 which are not swingable. These friction forces prevent the no longer supported blocking levers 3 from falling back.
  • An apparatus mountable on a key operated machine for selectively blocking actuation of at least one key of said key operated machine when mounted therein which comprises a control means pivotally mounted on a horizontal axis, said control means being positioned under the key levers and being provided with bearing means, said control means being mounted in a frame, said frame having means for attachment to said key operated machine, said control means being pivotable between a plurality of positions and being provided with means to fix it in a desired position, a plurality of individual blocking means provided with bearing means and being pivotably mounted on a horizontal axis, said blocking means being located between said key levers and said control means such that an actuated key lever can contact one of said blocking means and move said blocking means into engagement with said control means in at least one of the positions of said control means, a dog element secured to said frame and cooperating with said blocking means to serve as a limit for the movement of said blocking means, at least one of said blocking means and said dog element being flexible to the extent that upon the exertion of an excessive pressure between said blocking means and said dog
  • control means is control bar (2) provided with a control edge (21), an attenuation (22) and groove (23) and the blocking means (3) are provided with blunt stud (24) on which is seated groove (23) in the blocked position and attenuation (22) forces incompletely depressed blocking means (3) back into blocked position on continued turning of control bar (2) and control edge (21) cooperates with lug (20) of blocking means (3).
  • the means to fix the blocking means is comprised of spacers (34) arranged on axis (5) between blocking means (3), profile bar (35) preventing the rotation of the spacers (34) and spring means (42) mounted on axis (5) restraining the blocking means (3) in an axial direction.

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  • Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Physics & Mathematics (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Mechanical Control Devices (AREA)
US677531A 1966-10-27 1967-10-24 Selective blocking means for key machine Expired - Lifetime US3481444A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEJ32110A DE1302087B (de) 1966-10-27 1966-10-27 Tastensperrvorrichtung fuer Schreib- oder aehnliche Maschinen

Publications (1)

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US3481444A true US3481444A (en) 1969-12-02

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ID=7204362

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US677531A Expired - Lifetime US3481444A (en) 1966-10-27 1967-10-24 Selective blocking means for key machine

Country Status (6)

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US (1) US3481444A (enrdf_load_stackoverflow)
CH (1) CH467165A (enrdf_load_stackoverflow)
DE (1) DE1302087B (enrdf_load_stackoverflow)
GB (1) GB1203258A (enrdf_load_stackoverflow)
NL (1) NL6714620A (enrdf_load_stackoverflow)
SE (1) SE329638B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4300352A (en) * 1979-09-10 1981-11-17 The Geolograph Company Hydraulic pressure integrator

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1504576A (en) * 1922-12-14 1924-08-12 Pope Edwin Typewriter
US2012001A (en) * 1932-05-19 1935-08-20 George N Lemmon Means for facilitating the training of typists
US2320637A (en) * 1938-09-29 1943-06-01 Modigliani Gino Selective blocking arrangement for the keyboards of teleprinters having complete keyboards
US3021937A (en) * 1960-04-12 1962-02-20 Sperry Rand Corp Selective interlock mechanism
US3030009A (en) * 1956-03-05 1962-04-17 Triumph Werke Nuernberg Ag Combined typewriter and marking mechanism
US3045799A (en) * 1960-08-25 1962-07-24 Sperry Rand Corp Keyboard interlock control means

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1504576A (en) * 1922-12-14 1924-08-12 Pope Edwin Typewriter
US2012001A (en) * 1932-05-19 1935-08-20 George N Lemmon Means for facilitating the training of typists
US2320637A (en) * 1938-09-29 1943-06-01 Modigliani Gino Selective blocking arrangement for the keyboards of teleprinters having complete keyboards
US3030009A (en) * 1956-03-05 1962-04-17 Triumph Werke Nuernberg Ag Combined typewriter and marking mechanism
US3021937A (en) * 1960-04-12 1962-02-20 Sperry Rand Corp Selective interlock mechanism
US3045799A (en) * 1960-08-25 1962-07-24 Sperry Rand Corp Keyboard interlock control means

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4300352A (en) * 1979-09-10 1981-11-17 The Geolograph Company Hydraulic pressure integrator

Also Published As

Publication number Publication date
CH467165A (de) 1969-01-15
SE329638B (enrdf_load_stackoverflow) 1970-10-19
DE1302087B (de) 1969-12-18
GB1203258A (en) 1970-08-26
NL6714620A (enrdf_load_stackoverflow) 1968-04-29

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