US3516604A - Sequential keyboard interlock - Google Patents

Sequential keyboard interlock Download PDF

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Publication number
US3516604A
US3516604A US696919A US3516604DA US3516604A US 3516604 A US3516604 A US 3516604A US 696919 A US696919 A US 696919A US 3516604D A US3516604D A US 3516604DA US 3516604 A US3516604 A US 3516604A
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US
United States
Prior art keywords
slide
key
keystem
keys
interposer
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
US696919A
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English (en)
Inventor
Jackson C Taylor
Robert E Yates
Michael N Zell
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.)
International Business Machines Corp
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International Business Machines Corp
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Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
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Publication of US3516604A publication Critical patent/US3516604A/en
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06C—DIGITAL COMPUTERS IN WHICH ALL THE COMPUTATION IS EFFECTED MECHANICALLY
    • G06C7/00—Input mechanisms
    • G06C7/02—Keyboards
    • G06C7/04—Interlocking devices, e.g. between keys
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M11/00—Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys
    • H03M11/02—Details

Definitions

  • This invention pertains to devices for recording manually keyed information and more particularly, to such devices employing a series of keybanks.
  • the present invention utilizes a sequential interlock shown in a keybank of machine operation control keys to enforce a desired or necessary sequence of the operations determined by the control keys. Operation of a predetermined key moves an interposer into position to actuate a first slide when a differential actuator is cycled. When the differential actuator is cycled, the slide is moved to a position where it is latched. In either the initial or latched position the slide blocks operation of one or a plurality of the keys of the keybank.
  • a second slide member has a camming surface which functions to release the latch and permit return of the first slide and the keystem blocking elements carried thereby to the initial position.
  • an interposer prevents the change of position of the first slide until the differential actuator is cycled and permits rekeying if necessary.
  • almost any desired sequence of operation can be enforced by variations in the positioning of keystem blocks on the first slide member, such as the number of keys that can be blocked or the choice of sequence by having actuation of the first slide move keystem blocking elements into or out of blocking relation with respect to the various keystems of the bank.
  • Patented June 23, 1970 It is a further object of this invention to provide a simplified interlock for sequentially permitting or preventing operations of specified keys within a bank or system.
  • FIG. l is a schematic side elevation of a keybank and differential actuator partly broken away and partly in section showing the sequential interlock mechanism of this invention.
  • FIG. 2. is a side elevation of the slidable member of FIG. 1 which carries the cam release surfaces.
  • FIG. 3 is a side elevation of the slidable member latching mechanism and keystem blocking means of FIG. 1.
  • FIG. 4 is a schematic side elevation similar to FIG. 1 showing an alternative form of the invention.
  • FIG. 5 is an exploded isometric view of a portion of the keybank of FIG. 4.
  • a keybank 10 includes a series of depressible keys each having a keystem 12 with a projecting stud 13 mounted thereon. Each key is mounted for vertical reciprocating motion between an upper non-actuated position and a lower actuated position. The keys are each biased to the upper position by a spring 14 and are retained in a lowered position by a keylock slide (not shown) from which it is released automatically upon rekeying the keybank or completion of a machine cycle.
  • each keystem depends downwardly below the slide members 16 and 17 and when a key is depressed, the corresponding keystem end is disposed farther downward in a position to interfere with one of the lugs 18 on the differential actuator 20 when the latter is released and moves in the direction of arrow A.
  • Each keystem upon depression is positioned to intercept one of the lugs 18 of the differential actuator 20 after a given distance of travel from the initial position illustrated.
  • a pair of stationary horizontal pins 25 that project through elongated apertures 26 in slide members 16 and 17 to permit the slide members to move in a confined longitudinal path defined by the length of the apertures 26.
  • the slide members 16 and 17 are biased in the direction of arrow B respectively by tension springs 27 and 28 which are connected between the keybank frame 23 and depending projections 30.
  • An interposer 33 is mounted about a pair of pins 34 connected to slide member 16 to permit vertical relative movement therebetween while limiting longitudinal movement of interposer 33 to motion in unison with slide member 16.
  • the keystem stud 3S projects into the interposer recess 37 to cause depression of interposer 33 as the associated keystem 39 is depressed.
  • interposer 33 causes the surface 40 to be placed in the path of travel of the lug 18 on the differential actuator projection 41. Restoration of the keystem 39 to the raised position at the termination of the machine cycle also restores the interposer 33 to its raised full line position as shown in FIG. l. Also mounted about a stationary axis on the frame 23 is a pin 44 about which is pivotally mounted a latch lever 45 that is biased in one direction toward engagement with the slide member 16 by a tension spring 46. A slide member recess surface 48 provides a cooperating latch portion for receiving the latch lever 45 and retaining the slide member 16 in a second position against the biasing force of the spring 27.
  • a second slide member 17, best seen in FIG. 2 has a camming surface 50, which is engageable with the latching portion of lever 45 when disposed in position to retain the slide member 16 against the biasing force of the spring 27, to pivot latch lever 45 out of engagement with slide member 16, upon movement to the left as viewed in FIG. 2.
  • Slide member 17 also has an inclined camming surface 52 which is engageable with a keystem stud 109 to effect leftward motion of the slide as viewed in FIG. 2.
  • FIGS. 4 and 5 illustrate a second embodiment utilizing the sequential interlocks of this invention.
  • a series of depressible keys 71 are mounted for vertical reciprocating movement in a keybank and urged toward their upward position by springs 72.
  • a first slidable member 74 and a second slidable member 75 have horizontally spaced elongated apertures 77 through which are received a pair of stationary pins 79 to permit the slide members 74 and 75 limited horizontal travel.
  • the slide member 74 carries a pair of pins 80 which are received through an inner elongated opening in a vertically movable interposer member 82 which is reciprocated vertically by engagement between a keystem stud 83 and the upper and lower surfaces presented by interposer recess 85.
  • slide 75 carries a pair of pins 87 which extend through a vertically elongated opening in an interposer 88, the vertical reciprocating motion of which is controlled by engagement with the keystem stud 89 received in interposer recess 90.
  • a latch lever 91 is pivotally mounted about a pin 92 carried by the keybank frame with a tension spring 95 connected at one end to a depending portion 96 which urges the projecting pin 97 toward engagement with the lower surface of the slide 74.
  • Slide 74 has a recess 98 in the lower surface portion that is engageable with the latch lever pin 97 to restrain slide 74 against the force of the 'biasing tension spring 99 when the slide has been reciprocated to its opposite extreme position.
  • the slide 75 has a camming surface 100 formed in its lower surface which is engageable with the latch lever pin 97 in its latched position when slide 75 is reciprocated against the biasing force of the tension spring 102. to effect termination of the latched engagement between the latch lever 91 and slide 74.
  • Underlying the keybank is a horizontally reciprocable differential actuator 105 which presents keystem engaging lugs 106 engageable with the lower terminal end of a keystem when the latter is in a depressed actuated condition.
  • Actuation of the key 110 depresses both the lower terminal portion of keystem 39 and interposer 33 lower projection 111 to the dotted line positions and also through means not shown retracts the zero stop 113 to an elevated position thereby releasing differential actuator 20.
  • Differential actuator 20 moves in the direction of the arrow A until motion is arrested by engagement between a lug 18 and the downward terminal end portion 15 of a depressed keystem.
  • the depressed keystem is restored and differential actuator 20 restored in the opposite direction to the position shown in FIG. 1.
  • differential actuator lug 18 first engages interposer surface 40 and drives interposer 33 and slide 16 in unison until motion is terminated by engagement between lug 18 and keystem 39.
  • Latch lever 45 pivots into engagement with the slide recess 48 to retain the slide 16 in the shifted position against the biasing force of spring 27 as differential actuator 20 is driven back to the position illustrated to complete the cycle of operation.
  • the projecting stops 108 are respectively removed from interference with the keystem studs 109 Iand 109. In this condition key 107 may be depressed for one or more cycles of operation and key 107 may be depressed.
  • depression of key 107 causes keystem stud 109 to engage the camming surface 52 of slide 17 causing lateral movement of the slide 17 against the biasing force of tension spring 28 and causing the camming surface 50 to engage the latch lever 45 land release slide 16 to return to its initial position whereat the slide projections 108 are restored to the keystem stud blocking position shown.
  • depression of key 116 disposes both the keystern 117 and interposer 82 in the path of a differential actuator lug 10-6 whereby machine operation moves slide 74 to a position where it is retained by latch lever 91. Thereafter operations involving depression of key 116 may be repeated but key 119 may not be operated until key 120 and interposer 121 are depressed and the machine is cycled to cause a differential actuator lug 106 to move interposer 88 and slide 75 to effect release of latch lever 91 by engagement of camming surface 100 with pin 97. At this time restoration of slide 74 by action of spring 99 to a condition Whereat slide tab 121 no longer interferes with keystem stud 122 frees key 119 for operation.
  • FIGS. 4 and 5 illustrates a condition where operation of a selected key is precluded by operation of another key Within the key bank while the embodiment of FIGS. 1 through 3 shows a condition wherein operation of one ⁇ key within a bank of keys frees another key or keys for operation.
  • a keybank comprising:
  • cam means carried by said second slide for selectively engaging said latch means to release said first slide from said second position
  • stop means carried by said first slide operable to prevent operation of a first key of said pluralityof keys when said first slide is ldisposed in one of said first and second positions.
  • said latch means comprises a latch lever pivotably mounted on said frame and biased toward a position of engagement with said first slide member and a cooperating latch portion carried by said first slide member and engageable with said latch lever when said first slide member is in said second position.
  • the device of claim 2 further comprising first key actuated means operated by a second key of said plurality Iof keys for controlling movement of said first slide from said first to said second position.
  • the device of claim 3 further comprising second key actuated means operated by a third key of said plurality of keys for controlling movement of said second slide member to cam said latch lever away from engagement with said cooperating latch portion.
  • the device of claim 4 further comprising a differential actuator selectively engageable with said first ⁇ key actuated means to move said first slide member from said first position to said second position and wherein said first key actuatedl means comprises an interposer mounted on said first slide for reciprocating motion in a direction normal to the direction of movement of said first slide into and out of a position in the path of travel of a portion of said differential actuator whereby cycling said differential actuator causes said first rack to be moved from said first position to said second position.
  • a differential actuator operable to enter keyed information into the recording mechanism of said machine
  • a first slidable member supported on said frame and movable between a first position and a second position
  • biasing means urging said slidable member toward said first position
  • an interposer carried by said first slidable member and controlled by one of said plurality of keys for selective reciprocal movement generally normal to the path of travel of said first slidable member;
  • interposer being movable by depression of said one of said keys into the path of travel of said differential actuator for movement of said first slide member to said second position upon operation of said differential actuator;
  • the machine of claim 6 further comprising a second slidable member and wherein said latch means comprises a lever pivotably mounted on said frame and biasing means urging said lever toward latching engagement with said first slidable member and said operating means comprises a camming surface formed as a portion of said second slidable member.
  • said interposer is mounted on said first slidable member for movement in unison with said first slide member in the direction of travel of said first slidable member and for movement relative to said first slidable member in a direction normal to the direction of travel of said first slidable member and said first and second slidable members are mounted on said frame for movement along parallel paths.
  • said operating means further comprises a second interposer member carried by said second slidable member and movable by said key other than said one key to a position in the path of said differential actuator whereat operation of said differential actuator will cause said second slidable member to cam said latch lever away from a position of latching engagement with said first slidable member.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Physics & Mathematics (AREA)
  • Push-Button Switches (AREA)
  • Mechanical Control Devices (AREA)
US696919A 1968-01-10 1968-01-10 Sequential keyboard interlock Expired - Lifetime US3516604A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US69691968A 1968-01-10 1968-01-10

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US3516604A true US3516604A (en) 1970-06-23

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Application Number Title Priority Date Filing Date
US696919A Expired - Lifetime US3516604A (en) 1968-01-10 1968-01-10 Sequential keyboard interlock

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US (1) US3516604A (de)
DE (1) DE1809612A1 (de)
FR (1) FR1598293A (de)
GB (1) GB1243640A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3703987A (en) * 1971-09-01 1972-11-28 Ncr Co Keyboard locking device
US3724750A (en) * 1971-04-06 1973-04-03 Anker Werke Ag Device for registering business machines
USD311913S (en) 1987-04-22 1990-11-06 International Business Machines Corporation Keycap

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1900103A (en) * 1933-03-07 Calculating machine
US2665067A (en) * 1949-04-29 1954-01-05 Wassef Atalla Megalli Apparatus for effecting a desired sequence of operations
US2715498A (en) * 1955-08-16 Locking means for cash registers
US3024988A (en) * 1959-07-01 1962-03-13 Monroe Calculating Machine Keyboard mechanism

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1900103A (en) * 1933-03-07 Calculating machine
US2715498A (en) * 1955-08-16 Locking means for cash registers
US2665067A (en) * 1949-04-29 1954-01-05 Wassef Atalla Megalli Apparatus for effecting a desired sequence of operations
US3024988A (en) * 1959-07-01 1962-03-13 Monroe Calculating Machine Keyboard mechanism

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3724750A (en) * 1971-04-06 1973-04-03 Anker Werke Ag Device for registering business machines
US3703987A (en) * 1971-09-01 1972-11-28 Ncr Co Keyboard locking device
USD311913S (en) 1987-04-22 1990-11-06 International Business Machines Corporation Keycap

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Publication number Publication date
DE1809612A1 (de) 1969-08-07
GB1243640A (en) 1971-08-25
FR1598293A (de) 1970-07-06

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