US3403766A - Keyboard blocking arrangement - Google Patents

Keyboard blocking arrangement Download PDF

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Publication number
US3403766A
US3403766A US566637A US56663766A US3403766A US 3403766 A US3403766 A US 3403766A US 566637 A US566637 A US 566637A US 56663766 A US56663766 A US 56663766A US 3403766 A US3403766 A US 3403766A
Authority
US
United States
Prior art keywords
bail
toggle
keys
keyboard
keybars
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
US566637A
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English (en)
Inventor
Mason Frederick Percival
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.)
Creed and Co Ltd
Original Assignee
Creed and Co Ltd
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
Application filed by Creed and Co Ltd filed Critical Creed and Co Ltd
Application granted granted Critical
Publication of US3403766A publication Critical patent/US3403766A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L13/00—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00
    • H04L13/16—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00 of transmitters, e.g. code-bars, code-discs

Definitions

  • a common bail is interposed on the depression of a first key by erection of a toggle, and a mutual arrangement between the surfaces of the bail against the keybars and the direction of the movement of the bail, is such that the major component of force between the bail and the undepressed keys is along the direction of movement of the bail and in alignment with the limbs of the erected toggle.
  • the invention relates to keyboard apparatus such as teleprinters and electric typewriters and is concerned with the provision of means for blocking other keys of a keyboard when one has been depressed.
  • the keys are mounted on individual keybars which are parallel to one another and a bail, extending longitudinally of the keybars, is coupled to the keys in such manner that, on depression of one of the keys, the bail moves over the end of the depressed keybar and under the keybars of the remaining keys.
  • a bail extending longitudinally of the keybars
  • a keyboard locking device including a blocking member movable in a straight line, a toggle coupled between the blocking member and a fixed pivot, and means when one of the keys of the keyboard is depressed for erecting the toggle so that its two limbs are in alignment with one another and thereby interpose the blocking member in the path of other keys of the keyboard, the arrangement being such that a major component of the reaction between a depressed key and the blocking means lies in the direction of movement of the blocking means.
  • keys 1 are depicted, each incorporating a keybar 2, 3, 4 and 5, respectively.
  • the keybars 2, 3 and 5 are represented in their normal positions and keybar 4 is shown depressed.
  • the keybars lie parallel to one another in a row and, when one is depressed, it moves downward in substantially a straight line. Deviation from a straight line might arise on account of play in the guides (not shown) if a parallel motion is used, or on account of motion through a small are if a pivot is used, but such deviation can be ignored.
  • Key buttons 6 are mounted on each keybar, but in general, the key buttons of adjacent keybars are not in the same row or at the same level but, rather are staggered, as on an ordinary typewriter keyboard. In the drawing, for the sake of simplicity, they are however shown in one row.
  • the keybars project to the front, as viewed in the drawing, beneath their key buttons.
  • a common bail 7 is Patented Oct. 1, 1968 provided. This is shown integral with an actuating rod 8 capable of movement in a direction oblique to the lower surface of the keybars, which in the illustrated embodiment are shown as fiat and parallel, though this need not necessarily be so.
  • the connecting rod 8 slides in a guide 9 which is fixed by means not shown to the framework ice ' of the machine and, at its lower end, is coupled by means of a toggle 10 to a fixed pivot 11.
  • the pivot points on the two limbs 12 and 13 of the toggle, where they are joined to the connecting rod 8 and the fixed pivot 11, are in line with the direction of movement of the rod 8.
  • a known mechanical arrangement which could be used to erect and withdraw the toggle is shown on page 63 of Mechanisms, Linkages, and Mechanical Controls, published by McGraw-Hill, Inc., 1965.
  • the typewriter drive mechanism illustrated in that arrangement is used to erect a type bar, but could be adapted by one skilled in the art to erect the toggle, and the spring shown being used to return the toggle once the key is released.
  • An example of a known electromechanical arrangement is shown in the R. V. Reppert Patent #2,621,772, issued December 16, 1952, wherein the depression of a key closes electrical contacts and complete the circuits which energize the electromagnets.
  • the electromagnets are coupled to various linkages which perform the various movements and are returned upon the release of the key to their original position by the springs. This arrangement also could be applied to the present locking device by having the depression of a key energize a spring loaded electromagnet to erect the toggle.
  • a keyboard blocking arrangement for preventing depression of further keys when one is already depressed the keyboard including a row of parallel keys and the arrangement comprising:
  • a blocking member including a bail and a connecting a toggle having two limb members, one limb being pivoted to said connecting rod and the other to a fixed pivot;
  • linkage means responsive when one of the keys of the keyboard is depressed for erecting said toggle, so that its two members are in alignment with one another and said bail is interposed in the path of the other keys of the keyboard;

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Push-Button Switches (AREA)
US566637A 1965-08-06 1966-07-20 Keyboard blocking arrangement Expired - Lifetime US3403766A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB33803/65A GB1043667A (en) 1965-08-06 1965-08-06 Keyboard locking device for teleprinters and like keyboard-controlled apparatus

Publications (1)

Publication Number Publication Date
US3403766A true US3403766A (en) 1968-10-01

Family

ID=10357645

Family Applications (1)

Application Number Title Priority Date Filing Date
US566637A Expired - Lifetime US3403766A (en) 1965-08-06 1966-07-20 Keyboard blocking arrangement

Country Status (7)

Country Link
US (1) US3403766A (enrdf_load_stackoverflow)
BE (1) BE685178A (enrdf_load_stackoverflow)
DE (1) DE1299688B (enrdf_load_stackoverflow)
DK (1) DK117713B (enrdf_load_stackoverflow)
GB (1) GB1043667A (enrdf_load_stackoverflow)
NL (1) NL6611033A (enrdf_load_stackoverflow)
SE (1) SE306939B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6736805B2 (en) 1996-01-25 2004-05-18 Astrazeneca Ab Hydrophilic urinary catheter having a water-containing sachet

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US336725A (en) * 1886-02-23 lasae
US437371A (en) * 1890-09-30 Type-writing machine
US573619A (en) * 1896-12-22 Key-operated mechanism
US1940155A (en) * 1931-07-11 1933-12-19 Electromatic Typewriters Inc Power driven typewriting machine
US1945837A (en) * 1931-12-15 1934-02-06 Electromatic Typewriters Inc Remote control apparatus
US2383260A (en) * 1943-07-03 1945-08-21 Royal Typewriter Co Inc Typewriting machine
US2407195A (en) * 1944-02-17 1946-09-03 Ibm Typewriting machine
US2510577A (en) * 1947-06-05 1950-06-06 Ibm Keyboard lock for typewriting machines
US2633966A (en) * 1951-02-06 1953-04-07 Royal Typewriter Co Inc Operation control interlocking mechanism for typewriters or like machines

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US336725A (en) * 1886-02-23 lasae
US437371A (en) * 1890-09-30 Type-writing machine
US573619A (en) * 1896-12-22 Key-operated mechanism
US1940155A (en) * 1931-07-11 1933-12-19 Electromatic Typewriters Inc Power driven typewriting machine
US1945837A (en) * 1931-12-15 1934-02-06 Electromatic Typewriters Inc Remote control apparatus
US2383260A (en) * 1943-07-03 1945-08-21 Royal Typewriter Co Inc Typewriting machine
US2407195A (en) * 1944-02-17 1946-09-03 Ibm Typewriting machine
US2510577A (en) * 1947-06-05 1950-06-06 Ibm Keyboard lock for typewriting machines
US2633966A (en) * 1951-02-06 1953-04-07 Royal Typewriter Co Inc Operation control interlocking mechanism for typewriters or like machines

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6736805B2 (en) 1996-01-25 2004-05-18 Astrazeneca Ab Hydrophilic urinary catheter having a water-containing sachet
US20040153051A1 (en) * 1996-01-25 2004-08-05 Astrazeneca Ab, A Corporation Of Sweden Hydrophilic urinary catheter having a water-containing sachet
US7087048B2 (en) 1996-01-25 2006-08-08 Astrazeneca Ab Hydrophilic urinary catheter having a water-containing sachet
US20060293642A1 (en) * 1996-01-25 2006-12-28 Astrazeneca Ab Hydrophilic urinary catheter having a water-containing sachet
US7615045B2 (en) 1996-01-25 2009-11-10 Astrazeneca Ab Hydrophilic urinary catheter having a water-containing sachet

Also Published As

Publication number Publication date
DE1299688B (de) 1969-07-24
BE685178A (enrdf_load_stackoverflow) 1967-02-08
GB1043667A (en) 1966-09-21
DK117713B (da) 1970-05-25
SE306939B (enrdf_load_stackoverflow) 1968-12-16
NL6611033A (enrdf_load_stackoverflow) 1967-02-07

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