US3703987A - Keyboard locking device - Google Patents

Keyboard locking device Download PDF

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Publication number
US3703987A
US3703987A US177005A US3703987DA US3703987A US 3703987 A US3703987 A US 3703987A US 177005 A US177005 A US 177005A US 3703987D A US3703987D A US 3703987DA US 3703987 A US3703987 A US 3703987A
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US
United States
Prior art keywords
blocking
bellcrank
engaging
control keys
detent
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
US177005A
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English (en)
Inventor
Kazuhiko Ikeda
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.)
NCR Voyix Corp
National Cash Register Co
Original Assignee
NCR Corp
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 NCR Corp filed Critical NCR Corp
Application granted granted Critical
Publication of US3703987A publication Critical patent/US3703987A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • ABSTRACT A control mechanism in a keyboard of a data terminal device in which a key lock, when manually rotated in one direction, will selectively lock out one of a number of control keys on a keyboard, and when rotated in'the opposite direction, will selectively lock out others of the remaining control keys. Both lock out conditions are released by the energizing of a solenoid at the end of a machine operation. A second solenoid energized upon the initiation of a machine operation locks the control keys in their operated position during the machine operation.
  • the present invention is'directed to the keyboard of an electronically operated cash register containing control'keys which function, when depressed, to establish electronic circuits for performing various operations associated with the cash register such as the entry of amounts of money, the addition of a plurality of entries, printing of the amounts entered, and restoring the device to a condition to accept a new series of operations. It is desirable that. only one control key be operated at one time, less confusion arises in the operation of the device. It is further desirable to lock the keys in their position during a machine operation and to condition the return of the control key that has been operated to its home position at the completion of the operation of the device. I I I
  • a locking device associated with a plurality of control keys which includes a pair of slidably mounted locking detents, a drive member and an arm member actuated by a lock cylinder to selectively position the locking detents to lock various control keys in position, a second arm member adapted to hold one of said locking detents in a blocking position, and a pair of solenoids selectively controlling said second arm member to disable the operation of one of the locking detents after a machine operation has been initiated and to release said locking detent after the machine operation has been completed.
  • FIG. 1 is a plan view of the keyboard of the present embodiment.
  • FIG. 2 is a partial detailed side view of the keyboard showing the control keys and the locking mechanism.
  • FIG. 3 is a sectional view taken on line 3-3 of FIG. 2, showing the solenoids for controlling the operation of the locking mechanism.
  • FIG. 1 there is shown a view of the keyboard 20 used in the electronic cash register of the present embodiment. Included in the keyboard are a row of control keys 21, a row of clerk keys 22, two rows of transaction keys 23, three rows of amount keys24, and two rows of address-keys 25.
  • the present invention is directed to a locking mechanism which is utilized with the row of control keys 21, which includes a register key 26, a read key 27, and a reset key 28.
  • the register key 26 functions to condition the cash register for various machine operations controlled bythekeys in the transaction row 23
  • the read key 27 functions to read data inserted in the cash register
  • the reset key 28 functions, whendepressed, to erase all the information inserted in the cash register and to return all the depressed keys to their home position.
  • a key lock cylinder 30 mounted adjacent the control keys is a key lock cylinder 30, which is operated by inserting a key and then rotating the lock cylinder clockwise or counterclockwise.
  • each of the keys are urged into their upward or home position by a spring 32, mounted between a stud 33 located on the key member and a portion of the keyboard.
  • the stem portion of each of the key members comprises a hook portion 34 and a rod portion 35 positioned within slots located in a locking detent member 36 slidably mounted on a pair of support members 37, 38.
  • the detent member 36 has a bent over flange portion 39 containing a slotted portion 40 on which is mounted a compression spring 41 positioned between the support member 38 and the detent member 36.
  • the spring 41 normally urges the detent member 36 to the left as viewed in FIGS. 2 and 3.
  • the detent member 36 contains a plurality of slots 42 which allows the solid portion 43 (FIG. 2) between the slots to cooperate with the'hook portions 34 of the keys 26 to 28 inclusive, whereby the detent member 36 will be moved to the right upon depression of one of the control keys, as will be described more fully hereinafter.
  • a blocking detent member 44 Slidably'mounted on the support members 37, 38, is a blocking detent member 44 having a bent-over flange 45 with a slotted portion 46 supporting a compression spring 47 mounted between the support member 37 and the detent member 44, and which normally urges the detent member 44 to the right, as shown in FIGS. 2 and 3.
  • Located in the detent number are a series of slots 48 which cooperate with the rod portions 35 of the .keys 26 to 28 inclusive, which will be described more fully hereinafter.
  • the lock cylinder 30 which has a stud 50 (FIG. 2) depending from the bottom of the cylinder.
  • the stud 50 is positioned within a slot 51 located in a control plate 52 which is'slidably mounted on three studs 53 secured to the framework of the machine.
  • the studs 53 are positionedTwithin slots 54 located in the control plate 52.
  • the front portion of the control plate 52 comprises a bent-over flange 55 (FIG. 2) which is positioned adjacent the blocking detent 44.
  • the spring 47 engaging the detent 44 normally urges the detent into engagement with the flange 55.
  • a spring-56 which is mounted between the control plate 52 and a portion of the machine framework (not as shown in FIGS. 2 and 3.
  • an arm member 58 Rotatably mounted on a pin 57 located adjacent the control plate 52 is an arm member 58 and a bell crank 60. Mounted on one end of the arm 58 is a roller 61,
  • the bell crank 60 has a shoulder portion 66 which is moved into a blocking engagement with detent 36 by a spring 67 mounted between the bell crank and a stud 68.
  • the bell crank has a pair of arm portions .70, 71.
  • the arm portion 70 has a depending shoulder 72 which engages an armature member 73 of a solenoid 74.
  • the arm portion 71 has a depending shoulder 75 which engages a shoulder portion 76 of a latch member 77 rotatably mounted on a pin 78 secured in the machine framework.
  • the other end of the latch member 77 engages an armature 80 of a solenoid 81.
  • a spring 82 mounted between the latch 77 and the stud 68 normally urges the latch member in a clockwise direction as viewed in FIG. 3.
  • the solenoid 74 will have been energized, thus rotating the armature member 73 in a clockwise direction. This action will rotate the bell crank 70 counter-clockwise, thus removing its shoulder 66 from a blocking position with the detent 36.
  • the cam surface 65 of the plate will cam the roller 61 and the arm member 58in a counter-clockwise direction, thus removing the shoulder 62 of the arm from a blocking position with the detent 36, thereby releasing the detent for movement.
  • the hook portion 34 of the depressed key will cam the detent 36 to the right against the action of the spring 41.
  • the arm 58 will be rotated clockwise by the action of its spring 63 resulting in the positioning of its shoulder portion 62 in a blocking engagement with the detent 36. This operation will lock the depressed key in its depressed position, and will prevent any other control key from being depressed at this time. If the lock cylinder 30 is rotated 90 degrees counter-clockwise, as viewed in'FIG. 3, the control plate 52 will move a predetermined distance to the left which is greater than when the cylinder was rotated clockwise as described in the example previously cited. This leftward movement of the control plate 52 will position the detent 44 to condition only the control key 28 for operation.
  • the reset key 28 when operated will be locked in its depressed condition by the locking detent 36 in the same manner as described with respect to the control keys 26 and 27.
  • the selection of the control key to be depressed is conditioned on the direction of rotation of the lock cylinder 30.
  • the lock cylinder is rotated back to its home position after a control key has been depressed, the detent 36 will be locked in its position by the shoulder portion 62 of the arm 58, in the manner as described above, thereby locking the depressed control key in its operated position.
  • the solenoid 81 Upon operation of the machine, the solenoid 81 will be energized and the solenoid 74 will be de-energized. Energizing of the solenoid 81 will rock the armature in a clockwise direction resulting in the counterclockwise rotation of the latch member 77. This movement of the latch member will release the bell crank 60 to the action of the spring 67, thus moving the shoulder 66 into a blocking engagement with the locking detent 36. This action will assure that the depressed control key will remain depressed during a machine operation.
  • the solenoid 74 Upon completion of the machine operation, the solenoid 74 is energized which action will rotate the armature 73 clockwise. This movement of the armature will rotate the bell crank 60 counter-clockwise which is then latched by the latch member 77, under the action of the spring 82. At this time, the solenoid 81 has been de-energized. If the lock cylinder 30 has been turned clockwise or counter-clockwise, at this time, the latching of the bell crank 60 will allow the operator to depress a control key which action will move the locking detent 36 to the right to release the previously depressed control key.
  • means for selectively enabling a predetermined number of control keys for actuation including a. blocking means slidably mounted adjacent said control keys for disabling the control keys from actuation, said blocking means adapted for movement to a first position releasing a first number of control keys for actuation and to a second position releasing a second number of control keys for actuation; and i b.
  • a key-operated rotatably mounted locking means engaging said blocking means and adapted, where rotated in one direction, to move said blocking means to said-first position and when rotated in the opposite direction, to move said blocking means to said second position whereby a predetermined number of control keys are released for actuation.
  • said locking means includes a. a rotatably mounted key operated lock cylinder adapted for rotation in opposite directions;
  • said engaging means comprises a stud member positioned within said arcuate slot whereby upon rotation of said locking cylinder in opposite directions, said drive member is moved to two different positions.
  • the accounting machine of claim 3 which includes a normally disabled locking member slidably mounted adjacent each of said control keys and adapted, when released, to lock a control key in an actuated position, said locking member engaging said drive member whereby upon movement of said drive member, said locking member is released for operation.
  • means for selectively enabling a predetermined number of control keys for actuation including a. a first blocking member slidably mounted adjacent said control keys for normally disabling the control keys from actuation, said blocking member adapted for movement to a first position releasing a first number of control keys for actuation and to a second position releasing a second number 0 control keys for actuation;
  • a normally disabled locking member slidably mounted adjacent the control keys and adapted, when released, to lock a control key in an actuated position
  • movable drive means engaging said first blocking member and said locking member and adapted, when actuated, to release said locking member for operation and to move said first blocking member to either of said first and second positions;
  • a key-operated,'rotatably mounted lock cylinder engaging said drive means, said lock cylinder adapted, when rotated in one direction to actuate said drive means whereby said first blocking member is moved to said first position, and when rotated in an opposite direction, said blocking member is moved to said second position;
  • a second blocking member engaging said locking member for holding said locking member in a disabled position
  • first control means engaging said second blocking means and adapted, upon completion of a machine operation, to disable said second blocking member whereby upon rotation of said lock cylinder, an actuated control key is locked in its actuated position.
  • the accounting machine of claim 5 which includes second control means'engaging said second blocking member and adapted, upon initiation of a machine operation, to move said second blocking member to a position holding said locking member in a disabled position during a machine operation, whereby a control key is held in its actuated position during a machine operation.
  • said drive means includes a. a slidable mounted drive member engaging said first blocking member;
  • said second blocking member comprises a. a rotatably mounted bellcrank having a blocking portion positioned adjacent said locking member;
  • said first control means includes a first electromagnetic actuating member engaging said bellcrank, and adapted, upon operation at the end of a machine operation, to rotate said bellcrank whereby the blocking portion is disengaged from said locking member.
  • the accounting machine of claim 8 which includes a latch member rotatably mounted adjacent said bellcrank;
  • the accounting machine of claim 9 which includes a second electromagnetic actuating member engaging said latch member and adapted, when operated at the start of a machine operation, to rotate said latch member thereby releasing said bellcrank whereby the bellcrank is moved by said urging means in a direction to position the blocking portion of the bellcrank in blocking engagement with said locking member.
  • means for selectively controlling the actuation of the control keys including a. a first detent member slidably mounted adjacent said control keys for normally disabling the control keys from actuation, said first detent member adapted for movement to a first position thereby releasing a first number of control keys for actuation and to a second position thereby releasing a second number of control keys for actuation;
  • first resilient means engaging said first detent member for normally urging said detent member toward a position disabling the control keys from actuation;
  • a second detent member slidably mounted adjacent said control keys and adapted, when released, to lock'a control key in an actuated position
  • second resilient means engaging said blocking arm and adapted to move said arm to a position disabling the release of said second detent member
  • a bellcrank member rotatably mounted adjacent said second detent member, said bellcrank member having a blocking portion positioned adjacent said second detent member;
  • third resilient means engaging said bellcrank member and adapted to move said bellcrank to a position whereby the blocking portion disables the movement of said second detent member;
  • a slidable mounted drive member engaging said first detent member and said blocking arm and adapted, when actuated, to rotate said arm to release said second detent member and to move said first detent member to either of said first and second positions;
  • a rotatably mounted key operated lock cylinder engaging. said drive member and adapted, when rotated in one direction, to actuate said drive member to position said first detent member in said first position and when rotated in the opposite direction to position said first detent member in said second position;
  • an actuating member engaging said bellcrank member and adapted, when operated, to rotate said bellcrank member to a position whereby the blocking portion of said bellcrank member is positioned to release said second detent member; and a firstelectromagnetic operating member engaging said actuating member and adapted to operate said actuating member at the end of a machine operation whereby upon rotation of said lock cylinder, after a machine operation has ended, a predetermined control key will be locked in an actuated position.
  • the accounting machine of claim 11 which includes a. a latch member rotatably mounted adjacent said bellcrank member;
  • the accounting machine of claim 12 which includes a. a second actuating member engaging said latch member and adapted, when operated, to rotate said latch member thereby releasing said bellcrank member to the action of said third resilient means;

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Cash Registers Or Receiving Machines (AREA)
  • Lock And Its Accessories (AREA)
US177005A 1971-09-01 1971-09-01 Keyboard locking device Expired - Lifetime US3703987A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US17700571A 1971-09-01 1971-09-01

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US3703987A true US3703987A (en) 1972-11-28

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Application Number Title Priority Date Filing Date
US177005A Expired - Lifetime US3703987A (en) 1971-09-01 1971-09-01 Keyboard locking device

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US (1) US3703987A (enrdf_load_stackoverflow)
JP (1) JPS4833895A (enrdf_load_stackoverflow)
CA (1) CA950425A (enrdf_load_stackoverflow)
GB (1) GB1366732A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4766540A (en) * 1981-10-13 1988-08-23 Casio Computer Co., Ltd. Electronic cash register with programmable mode/function key settings
US6768428B1 (en) 2002-03-27 2004-07-27 Blaine C. Readler Computer keyboard lock
EP2106578A4 (en) * 2007-01-22 2011-05-25 Simon Yoffe SAFETY SWITCH
US20110179482A1 (en) * 2007-01-22 2011-07-21 Simon Yoffe Security switch
US10930452B2 (en) 2018-06-29 2021-02-23 Purism Electronic kill and physical cover switch

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS548049B1 (enrdf_load_stackoverflow) * 1971-03-12 1979-04-12

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2210065A (en) * 1940-08-06 Cash register
US2280958A (en) * 1942-04-28 Cash register
US3464623A (en) * 1964-08-11 1969-09-02 Sperry Rand Corp Control mechanism for calculating machine
US3516604A (en) * 1968-01-10 1970-06-23 Ibm Sequential keyboard interlock

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2210065A (en) * 1940-08-06 Cash register
US2280958A (en) * 1942-04-28 Cash register
US3464623A (en) * 1964-08-11 1969-09-02 Sperry Rand Corp Control mechanism for calculating machine
US3516604A (en) * 1968-01-10 1970-06-23 Ibm Sequential keyboard interlock

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4766540A (en) * 1981-10-13 1988-08-23 Casio Computer Co., Ltd. Electronic cash register with programmable mode/function key settings
US6768428B1 (en) 2002-03-27 2004-07-27 Blaine C. Readler Computer keyboard lock
EP2106578A4 (en) * 2007-01-22 2011-05-25 Simon Yoffe SAFETY SWITCH
US20110179482A1 (en) * 2007-01-22 2011-07-21 Simon Yoffe Security switch
US8522309B2 (en) 2007-01-22 2013-08-27 Simon Yoffe Security switch
US10930452B2 (en) 2018-06-29 2021-02-23 Purism Electronic kill and physical cover switch
US11574781B2 (en) 2018-06-29 2023-02-07 Purism Electronic kill and physical cover switch

Also Published As

Publication number Publication date
JPS4833895A (enrdf_load_stackoverflow) 1973-05-14
GB1366732A (enrdf_load_stackoverflow) 1974-09-11
CA950425A (en) 1974-07-02

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