US3536178A - Selective blocking means for a key operated machine - Google Patents

Selective blocking means for a key operated machine Download PDF

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Publication number
US3536178A
US3536178A US765204A US3536178DA US3536178A US 3536178 A US3536178 A US 3536178A US 765204 A US765204 A US 765204A US 3536178D A US3536178D A US 3536178DA US 3536178 A US3536178 A US 3536178A
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US
United States
Prior art keywords
key
control
keys
blocking
operated machine
Prior art date
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
Application number
US765204A
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English (en)
Inventor
Gert Breidenbach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INTERTIP AG
Original Assignee
INTERTIP AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19671611450 external-priority patent/DE1611450C3/de
Application filed by INTERTIP AG filed Critical INTERTIP AG
Application granted granted Critical
Publication of US3536178A publication Critical patent/US3536178A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B41J5/24—Interlocks between keys, e.g. without detent arrangements with 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

  • This invention relates to 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 plurality of control means in cooperation with individual keys of said key operated machine for individually blocking actuation of said keys, said control means being biased in a key blocking position, a plurality of control rods, each cooperating with an associated control means, a first electromagnetic means moving said control rods collectively from a position of nonactivation of said control means to a position of activation of said control means, releasable means for holding said control means in a key unblocking position, a plurality of movable blocking means in cooperation with said control rods to block movement of some of said control rods and a plurality of second electromagnetic means in cooperation with said movable blocking means to move said movable blocking means from a position blocking said control rod movement to a position unblocking said control rod movement whereby said control means in association with said control rods are activated to unblock
  • An object of the invention is to provide a device for selectively blocking actuation of the keys of a key operated machine in a simple and reliable manner and which may be easily installed.
  • Another object of the invention is to provide 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 plurality of control means in cooperation with individual keys of said key operated machine for individually blocking actuation of said keys, said control means being biased in a key blocking position, a plurality of control rods, each cooperating with an associated control means, a first electromagnetic means moving said control rods collectively from a position of nonactivation of said control means to a position of activation of said control means, releaseable means for holding said control means in a key unblocking position, a plurality of movable blocking means in cooperation with said control rods to block movement of some of said control rods and a plurality of second electromagnetic means in cooperation with said movable blocking means to move said movable blocking means from a position blocking said control rod movement to a position unblocking said control rod movement whereby said control means in association with said control rods are activated to unblock actuation of said keys.
  • FIG. 1 is a perspective cross section, parallel to the keys, of
  • unlocking of any group of keys may as well be effected in that the individual keys of this group have to be struck in a certain sequence whereby the programming of the key sequence is arranged in such a way that only after actuation of the respective key, is the programmed next key unlocked.
  • the device of the invention serves substantially for teaching children as young as four years old how to type, particularly, how to type blindly, on typewriters and the like. Up to the present time, it has been customary to provide such instruction machines with colored markers for the keys which, however, has the disadvantage that the pupil has to look at the keys.
  • the child can try all keys; however, only the right key can be activated, that is, the key which is not locked.
  • the device of the invention is useful in cooperation with auxiliary devices to make appear the letter which is connected with this key on a screen and at-the same time to have it announced over a loud speaker, that is, to have it transferred acoustically.
  • a group of keys can be unlocked so that the keys of this group can be operated arbitrarily.
  • the child knows already in which sequence to strike the correct keys.
  • the child no longer received the wrong signal with reference to the particular sequence of the keys of the unblocked group but all the other keys remain locked.
  • all keys can be unlocked if the typewriter is to be used in the normal way.
  • the detent l rotates about its extension rod 10 and its extension, flange 7, on rotation extends into recess 6, prevents the key lever 3, terminating in a key 3b, being depressed between the guide jaws 2, from going all the way down, that is, it is locked.
  • Spring 5 on its part is attached prestressedly to the housing or guide jaws 2 and the flange 16 of the detent 1.
  • A.detent l is provided for each key lever 3 in side by side fashion under the machine. All of the accumulator members 4 can be displaced toward the right (FIG. 1) by turning the adjustment lever 10 clockwise in FIG. 1. Rotation of adjustment lever 10 causes rotation of the cam 8 shown in cross section which rotates clockwise about fulcrum 62 in recess 60 in which is partially in solid bottom portion 20 and partially in the individual wall portions 20a (shown by dotted quarter circle of 60) of carrier element 20. The rotation of cam 8a about fulcrum 62 pushes against the shoulder 61 of accumulator member 4 and displaces the same to the right. Recess 9 in the accumulator members 4 allows this displacement to the right. Thereupon spring 11 is tensioned so that it can return cam 8 to its original position on release of adjustment lever 10.
  • the protruding accumulator member 4 is pushed against the lock bar 13 by means of spring 12 and, when displaced to the right, is locked with its recess 14 behind the edge 15 of the lock bar 13. Thus all displaced accumulator members 4 are kept in this locked position. At the same time they have pushed to the side the flanges 16 of the detents 1 and the protruding flanges 7 are turned into the recesses 6. Thus it becomes possible to depress the keys 3b of all the key levers 3 of the keyboard.
  • the springs 12 push the accumulator members 4 against the edge 15 of the lock bar 13', on the other hand, they also act to push the accumulator members 4 into the locking position whereby they are shifted to the left, as is shown in FIG. 1.
  • Springs 12 succeed in pushing the accumulawhich 'are push a a
  • the flanges 7 of the detents 1 can return from the recess q dles 23a and 23b;
  • wall portion 20a are slot holes .wall portion 20a actly byhalf thedistance upon whether one or several of the of the control bars 29-4541 .tion, one of lockbar 13, against the tension or the spring .13 is turnedand the edge ;15 of the lock bar:
  • FIGS. 3 to6 illustratethe'operation of the pawls 22;
  • FIG. 3 illustrates in an exploded view. therela'tionship of slot holes 24a and 24b within the carrier'element Zt'lsubdivided into-a solid -top portion20c, a solid bottom portion b andindividual wall portions 20a between each slot 48.
  • slot holes 24a and 24b within the carrier'element Zt'lsubdivided into-a solid -top portion20c, a solid bottom portion b andindividual wall portions 20a between each slot 48.
  • Control bars 29-" +34 lie in'opening 100 made up of cooperating slots in the solid b'ottor'n portion 20b andthe individual a of carrier element 21).
  • the solid bottom portion'20b of carrier element 20 contains individual slots 104in trol rod21 return to their restingpositiomshown in FIG. 1.
  • FIG; 2 indicates individual positions 3539 of control rods 21 if only control bar 29 and no other is switched. Thus,.none of control bar 30, has to be switched. For position. 31,111: control, bars 29 and 30 have to be switched. Thus,although the cam thejarrangement shown in FIG. 1, this is the case, for inthe lever 26 graspswith its guide slot 27, thespindle 23c and, 1 guides it through the slot hole 24b. At'the same time, with-all '22,, thei'other spindle23b is guided through the.
  • control bar 29 unlocks position 35, however, the cam 2 8 c of the control bar 30 is'pushed into position'35. In this way. the way the control bars 29-,34 cause an unquestionable selection of the control rods 21 for any switch position;
  • control 7 means for releasing said releaseable means whereby said control 7 means are biased to'a' key blockingposition.

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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)
  • Input From Keyboards Or The Like (AREA)
US765204A 1967-10-09 1968-10-04 Selective blocking means for a key operated machine Expired - Lifetime US3536178A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19671611450 DE1611450C3 (de) 1967-10-09 1967-10-09 Tastensperre für Büromaschinen

Publications (1)

Publication Number Publication Date
US3536178A true US3536178A (en) 1970-10-27

Family

ID=5681722

Family Applications (1)

Application Number Title Priority Date Filing Date
US765204A Expired - Lifetime US3536178A (en) 1967-10-09 1968-10-04 Selective blocking means for a key operated machine

Country Status (5)

Country Link
US (1) US3536178A (en, 2012)
CH (1) CH480181A (en, 2012)
FR (1) FR1588306A (en, 2012)
GB (1) GB1248447A (en, 2012)
SE (1) SE348681B (en, 2012)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3810317A (en) * 1971-09-07 1974-05-14 Marconi Co Ltd Display systems
US4059184A (en) * 1977-01-03 1977-11-22 International Business Machines Corporation Single print element selection apparatus with multiple selection inhibiting means
US4185400A (en) * 1978-08-14 1980-01-29 Sears, Roebuck And Co. Typewriter with instructional apparatus
CN104123877A (zh) * 2014-07-04 2014-10-29 龙岩学院 一种凸轮机构位移-廓线生成演示仪

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3810317A (en) * 1971-09-07 1974-05-14 Marconi Co Ltd Display systems
US4059184A (en) * 1977-01-03 1977-11-22 International Business Machines Corporation Single print element selection apparatus with multiple selection inhibiting means
US4185400A (en) * 1978-08-14 1980-01-29 Sears, Roebuck And Co. Typewriter with instructional apparatus
CN104123877A (zh) * 2014-07-04 2014-10-29 龙岩学院 一种凸轮机构位移-廓线生成演示仪

Also Published As

Publication number Publication date
CH480181A (de) 1969-10-31
GB1248447A (en) 1971-10-06
SE348681B (en, 2012) 1972-09-11
FR1588306A (en, 2012) 1970-04-10

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