US3552643A - Easy depression control mechanism for a calculating machine - Google Patents

Easy depression control mechanism for a calculating machine Download PDF

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Publication number
US3552643A
US3552643A US818867A US3552643DA US3552643A US 3552643 A US3552643 A US 3552643A US 818867 A US818867 A US 818867A US 3552643D A US3552643D A US 3552643DA US 3552643 A US3552643 A US 3552643A
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Prior art keywords
slide
operation control
slides
latch
cam
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US818867A
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English (en)
Inventor
Donald R Crain
Charles A Haase
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Unisys Corp
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Burroughs Corp
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Assigned to BURROUGHS CORPORATION reassignment BURROUGHS CORPORATION MERGER (SEE DOCUMENT FOR DETAILS). DELAWARE EFFECTIVE MAY 30, 1982. Assignors: BURROUGHS CORPORATION A CORP OF MI (MERGED INTO), BURROUGHS DELAWARE INCORPORATED A DE CORP. (CHANGED TO)
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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

Definitions

  • a cycle initiating slide is activated, and at least one control slide corresponding to the depressed key is simultaneously translated from a central inactive home position to either a forward or rearward activating position wherein selected cooperation is provided with the various mechanisms of the calculating machine to produce corresponding machine functions.
  • EASY DEPRESSION CONTROLr M ECl-IANISM FOR A CALCULATING MACHINE BACKGROUND OF THE INVENTION Calculating machines are generally provided with a plurality of live operation control keys which are depressibly arranged in predetermined column columns and rows ofthe calculating machine's keyboard, and which are individually coopcrable with the various function producing mechanisms of the calculating machine, such keys being directly connected by linkage means to such sundry mechanisms.
  • considerable force is commonly required in order to depress the operation control keys, such depression being hampered by the weight and drag of the various mechanisms themselves.
  • an operation control key located in a given keyboard position is generally limited to the function producing characteristics that were anticipated at the time the machine was built by the manufacturer, and changes therein are normally realizable only at near prohibitive cost and inconvenience.
  • suchchanges in the functional characteristics of one or more operation control keys generally require extensive disassembly, modification and reassembly of the various function producing mechanisms.
  • An important aspect of the invention' is the use of a plurality of function producing control slides which are mounted for two degrees of freedom on an auxiliary side frame that is readily attachable to one of the exterior side frames of a calculating machine.
  • the upper edges of these control slides are provided with a plurality of slots the distinctive slope formations of which are effective, in response to the depression of corresponding operation control keys, to translate the control slides from a central home position to either a forward or rearward activating position.
  • control slides Included amongthe control slides is a cycle initiating slide which is activatable by the depression of each of the operation control keys, such activation being effective to lower the control slides from their upper home positions to their lower actuating positions wherein cooperation is provided as between the forwardly and rearwardly translated control slides and the corresponding function producing mechanisms ofthe machine.
  • Another aspect of the invention is the use of a pair of interconnected bellcranks and a biased cam associated therewith as a means of lowering the control slides from their upper home positions to their lower actuating positions, the interconnected bellcranks serving also as a means for mounting the control slides for their said two degrees of freedom.
  • Still another aspect of the invention is the use of latching means associated with the cycle initiating slide, such latching means serving to latchably secure the control slides in both their upper home and lower actuating positions.
  • FIG. l is an inside elevation ofthe preferred embodiment of the invention showing the auxiliary side frame with the interconnected bellcranks, the biased cam,and the cycle initiating slide mounted thereon, the latter slide being disposed in its upper home position;
  • FIG. 2 is an inside elevation of'the invention showing the various parts of FIG. I in their activated states and with the cycle initiating slide located in its lowered position;
  • FIG. 3 is a top plan view ofthe auxiliary side frame showing the interconnected bellcranks and a pair of grooved shal'ts mounted thereon;
  • FIG. 4 is a perspective view taken from the top side showing the cycle initiating slide and four representative operation control slides mounted in theirl respective grooves of the grooved shafts; v
  • FIG. 5 is an inside elevation showing a pair of operation control slides in their upper home and central positions, and showing also an operation control key in relationship with corresponding slopes formed on the upper edges thereof;
  • FIG. 6 is an inside elevation showing the control slides of FIG. 5 in their lowered positions, such slides having been translated in opposite directions from their central home positions;
  • FIG. 7 is a detailed view showing two of the operation control slides of FIG. 4 in their disassembled states.
  • the preferred embodiment of the invention comprises an auxiliary side frame 21 by means of which the various parts of the mechanism are operably supported', the auxiliary side frame being attachable to the right side exterior side frame of the calculating machine,
  • the embodiment includes a pair of interconnected, rotatable bellcranks 23 and 25 which serve to support a plurality of translatable control slides such as the slides 85, 115, 117, 119 and 121 shown in the drawings.
  • bellcranks 23 and 25 are rotatably mounted on the auxiliary side frame 21 by means of a pair of studs 27 which arc fixed to the respective bellcranks and which extend therefrom through a pair of bushings 28 into journaled termination in the side frame 21.
  • the bellcranks 23 and 25 are pivotally connected at their lowermost extremities by a link 29.
  • a spring 79 connected at one end to a stud 8l fixed to the side frame 21 and at the other end to a stud 83 fixed to the bellcrank 23, serves to bias the bellcranks 23 and 25 in a clockwise direction (as viewed in the drawings) on their respective studs 27.
  • the bellcrank 25 is provided with a roller 55 supported by an extended stud 57 fixed to the bellcrank 25 and extending in the direction ofthe side frame 21.
  • Rotatably mounted on the auxiliary side frame 21 also is a latch 59, a cam 35, and an arm 41, the latter cam and arm being connected by a link 43pivotally supported by a stud 45 fixed to the arm 41 and a screw stud 47 secured to the cam 35.
  • the latch 59 is rotatably mounted on the side frame 21 by means of a stud 60 and comprises an offset lug 61 formed on its lowermost portion and an extension 63 (FIG.
  • the cam 35 is rotatably mounted on the side frame 21 by means of a stud 37 fixed to the cam 35 and extending through a bushing 39 into journaled termination in the side frame, the location of the cam 35 being such that a raised portion thereof is disposed in coopcrable relationship with the roller 55 of the bellcrank 25.
  • the cam 35 is provided with a notch 5I, and a cutout 53 the purpose of which is described in a subsequent paragraph.
  • the rotatable arm 4l is mounted on the auxiliary side frame 2l by means of stud 42 which is fixed to the arm 41 and extends through a bushing 44 into journaled termination in the auxiliary side frame.
  • the arm 4l is provided with a roller 49 the function of which is hereinafter described.
  • the latch 59 is biased in a clockwise'dircetion on the stud 60 by a spring 7l connected to a stud 75 fixed to the side frame 2l and to a stud 73 fixcfl to the latch 59, such clockwise bias serving to urge thc lug 61 into cooperating relationship with the cam 35 and more particularly with the notch 51 formed therein.
  • the cam 35 is biased in a clockwise direction on the stud 37 by a spring 65 connected to a limit stud 69 fixed to the side frame and to a stud 67 fixed to the side surface of the cam, such bias serving to rotationally urge the cam 35 in such manner that its raised portion would upwardly activate the roller 55 supported by the bellcrank 25 and would thereby rotate the bellcranks and 23 in a counterclockwise direction on their respective studs 27.
  • each of the bellcranks 23 and 25 is provided with a grooved shaft 31 as best shown in FIG. 3, such grooved shafts being so disposed on their respective bellcranks that the clockwise rotation of the bellcranks by the spring 79 results in the elevation of the shafts, and the counterclockwise rotation of the bellcranks by the spring 65 and the cam 35 results in the lowering of such shafts.
  • each of the grooved shafts of the embodiment is provided with 12 grooves 33 (FIG. 3), such grooves forming 12 parallel pairs of coplanar grooves. Each of these pairs of grooves is designed to accommodate a separate slide, as suggested by FIG. 4.
  • a cycle initiating slide 85 is disposed in the first pair of grooves adjacent the bellcranks 23 and 25, such slide being translatably carried by the slideable cooperation of a pair of slots 89 formed in the slide and said first pair of grooves 33.
  • An' enlarged circular portion of each of the slots 89 serves to facilitate the assembly of the slide on the shaft 31.
  • This cycle initiating slide is lprovided with a plurality of slots formed in its uppermost portion, such slots being formed in part by angular slopes 87 which are cammingly responsive to the depression of the various operation control keys to translate the slide a minimal distance in a rearward direction (as viewed in the drawings). As indicated by FIG. 5.
  • each operation control key is provided with an elongated key stem 86 that transverses all of the control slides that may be mounted on the grooved shafts 31.
  • the elongated key stern 86 of each of the operation control keys is accordingly transversely aligned with a corresponding slope 87 of the cycle initiating slide 85 and is therefore effective for rearwardly activating the slide 85 against the bias of a spring 77 connected to an aperture formed in the rightmost extremity of the slide (as viewed in FIGS. 1 and 2) and to the stud 60.
  • the cycle initiating slide 85 is also provided with a cutout 91, a slide latch 95, and a pivot pawl 107.
  • the cutout 91 affords free activation of the slide 85 without interference' from an aligning bar 93 which is rigidly connected to the auxiliary side frame 2l and to the side frame of the calculating machine, the purpose of the aligning bar being described in a subsequent section.
  • the slide latch 95 is translatably mounted on the cycle initiating slide 85 by means of a pair of shouldered studs 97 in cooperation with a slot formed in the latch, thc latter having a latch portion 103 disposed in cooperating relationship with a square stud 105 fixed to the auxiliary side frame 21.
  • a spring 101 connected to a depending lug of the slide latch 95 and to an aperture formed in the cycle initiating slide serves to bias the slide latch 95 and the latch portion 103 in a rightward direction (as viewed in drawings) on the cycle initiating slide 85.
  • the pivot pawl 107 is rotatably mounted by a shouldered stud 109, the rotation of the pivot pawl thereon being defined by the cooperation of a limit stud 111 fixed to the slide 85 and the extremities of a slot formed in the pivot pawl.
  • a spring 113 is connected to an aperture formed in the pivot pawl and to a stud 114 fixed to the slide 85.
  • the previously mentioned l2 pairs of grooves of the grooved shafts 3l of the preferred embodiment provide for the accommodation of the cycle initiating slide 85 and ll operation control slides.
  • Four representative slides of the possible l l control slides are shown in FIGS. 4 through 7 and indentified by reference numbers 115, 117, 119 and 121. These representative control slides are disposed in the twelfth, eleventh, eighth, and fifth pairs of grooves 33 of the shafts 31, respectively.
  • each of these four representative control slides is also provided with a pair of slots 89, and that each is provided with a cutout 123 having a pair of prongs 125 depending thercinto, such prongs forming three slots which are differentially engagcahle with the aligning bar 93 when the slides are lowered from their upper home positions to their lower actuated positions ⁇ as described in greater detail in the following section.
  • the cycle initiating slide 85 is held in its forward position (rightmost position as viewed in the drawings) by the spring 2.
  • the latch portion 103 of the slide latch 95 is disposed in latchable contact with the uppermost surface of the square stud 105, the slide latch being held in its forward position on the cycle initiating slide 85 by the spring
  • This latched positioning of the slide latch is effective to retain the bell- ⁇ cranks 23 and 25 in their clockwise rocked positions on their studs 27 (as viewed in the drawings), the roller 55 of the bellcrank 25 serving to bloekably limit the clockwise rotation of the cam 35 by means of its blocking contact with an arcuate portion thereof formed by the cutout 53, and the extension of the extended stud 57 serving to hold the latch 59 in a slightly counterclockwise rocked position on the stud 60 by means of its contact with the extension 63.
  • the cam 35 is held in its counterclockwise rocked position against the bias of the spring 65 by the blocking contact of the roller 55.
  • the various parts of the embodiment are accordingly positioned as illustrated in FIGS. 1 and 5.
  • the elongated key stern 86 of the depressed key effectively' translates the cycle initiating slide 85 a minimal rearward distance (to the left as viewed in the drawings), at the same time translating one or more operation control slides in either a forward or rearward direction from their central position or positions according to the angles of' the inclined camming slopes 87 that are encountered by the operation control key.
  • the rearward translation of the cycle initiating slide serves instantaneously to effectuate the followmg:
  • the latch portion 103 of the slide latch 95 is rearwardly withdrawn from the upper surface of the square stud 105.
  • the cam 35 is rotated in a clockwise direction on the stud 37 by the spring 65, such clockwise rotation serving to rotate the bellcranks 23 and 25 in a counterclockwise direction on their studs 27 by the camming action ofthe raised portion of the cam against the roller 55 of the bellcrank 25, the counterclockwise rotation of the bellcranks being limited by contact of the lower portion of the bellcrank 25 against the limit stud 69.
  • the cycle initiating slide 85 and the various operation control slides are lowered by this counterclockwise rotation of the bellcranks to assume the position illustrated in FIGS ⁇ 2 and 6, the lowering of those control slides which were translated i from their central positions to either their forward or rearward positions being effective to actuate' the corresponding function producing mechanisms of the calculating machine.
  • an engagement occurs as between one of the three slots formed by the prongs of each control slide and the aligning bar 93, those control slides which were rearwardly translated being aligned by means of the rearmost slots, those slides which were translated forwardly being aligned by means of the frontmost slots, and those control slides which were not translated from their central positions being aligned by means of the central slots.
  • the embodiment of the invention is restored to its normal home state in the following sequence and manner:
  • a cam associated with thc drive shaft of the calculating machine cooperates with the roller 49 ofthe arm 41 to thereby rotate the arm in a counterclockwise direction on its stud 42, and to rotate the cam 35 in a counterclockwise direction by means of the link 43, such counterclockwise rotation of the cam serving to extendably power the -spring 65.
  • This countcrclockwise rotation of the cam 35 is sufficient to permit the offset lug 61 of the latch 59 to assume a blocking position relative to the notch 5l, as motivated by the spring 71.
  • a separate cam of the drive shaft of the calculating machine forcibly contacts the pivot pawl 107 and thereby translates the cycle initiating slide 85 a minimal distance in a rearward direction (to the left as viewed in thedrawings), such translation serving to withdraw the latch portion 103 of the latch 95 from the lower surface of the square stud 105.
  • This control slide 119 is particularly adapted to the actuating requirements of a twodirection carry accumulator of a type contained in the calculating machine for which the preferred embodiment of the invention was developed.
  • This accumulator is comprised of a single set of accumulating gear wheels which are hoth additively and subtractively rotated in the performance of add and subtract opera tions.
  • a plurality of carry sectors contained in this accumulator may be revcrsibly biased in either an add or a subtract direction in response to the depression of selected operation control keys of the keyboard. Accordingly, when an add operation control key is depressed. thec-ycle initiating slide is translated a minimal distance in a rearward direction (as described in the foregoing), and the control slide l t9 is trans lated to its forward activating positionwhcrcin its lowering will serve to bias the carry sectors in an add direction and the accumulator gear wheels will be'rockahly engaged with actuating racks after the latter racks have heen differentially elevated according to the numerical values indexed in thc keyboard, the ⁇ return restoration of the actuating racks serving to rotate the accumulating gear wheels a corresponding distance in an add direction.
  • control slide 119 When an operation control key other than an add or a subtract key is depressed, the control slide 119 is permitted to remain in its central position wherein its lowering will have no effect on the accumulator, neither on the biasing of the carry sectors nor on the engagement of the gear wheels-withthe actuating racks.
  • a calculating machine havingcycling means, a plurality of function producing mechanisms, and a plurality of cycle-initiating operation control keys disposed in the keyboard thereof, a control mechanism responsive to the depression of individual ones of said operation control keys and effective for selectively activating at least one of-said function producing mechanisms corresponding thereto, said control mechanism comprising:
  • each of said grooved shafts being fixed to its respective bellcrank at a corresponding equidistant spaced-apart point from the point of rotation of said bellcrank, each of said shafts having a corresponding plurality of grooves formed therein, the axially disposed grooves of said shafts forming parallel pairs of coplanar grooves into which the walls of said slots of said slides are translatably fitted.
  • each of said slots having an inclined rear wall for cammably receiving the key stein of its corresponding operation control key and for thereby translating said slide a minimal distance in a direction opposite its said unidirectional bias;
  • first latch slideably mounted on said cycle initiating slide by means of a pair of spacedapart shoul dered studs housed within said slot thereof and fixed to a side surface of said slide, said first latch having a latch portion extending outwardly therefrom and being biased in the direction of said latch portion;
  • a rotatably biased pivot pawl carried by a stud fixed to said cycle initiating slide, said pivot pawl being cammably responsive to said cycling means for translating said slide a minimal distance in said direction opposite said unidirectional bias thereof.
  • each of said plurality of operation control slides comprises:
  • an aperture formed in said slide in associated relationship with said second aperture formed in said cycle initiating slide, said aperture having a first, second and third slot formed by a pair of spaced-apart prongs depending from the upper wall of said aperture, said second slot being associated with and defining said central positioning of said slide and said first and said third slots being associated with and defining the positioning of said slide in its said first and said second activating positions, respectively; and
  • first and a second variously detailed extremity said first extremity being so detailed as to establish said operable cooperation of said slide with its said corresponding function producing mechanism when said slide is actuated while located in its said first activating position, and said second extremity being so detailed as to establish said operable cooperation of said slide with its said corresponding function producing mechanism when said slide is actuated while located in its' said second activating position.
  • each of said plurality of operation control keys is provided with an elongated key stem that transverses said cycle initiating slide and all of said operation control slides, said elongated key stem cooperating with said inclined rearwall ofa corresponding one of said vertical slots formed in said cycle initiating slide to thereby translate said slide in said direction opposite its said undirectional bias, and cooperating also with corresponding ones of said inclined camming surfaces of said plurality of operation control slides, said latter cooperation being effective to translate said operationontrol slides that are associated with said depressed operationcontrol key'to either their said first or their said second activating positionsy and to return said previously activated operation control slides that are disassociated from said depressed control key to their said central positions.
  • control mechanism dcfinedfjn claim 6 wherein said actuation of said plurality of operation control slides is characterized by the lowering of said slides from their upper honte positions, wherein their said inclined camming surfaces are disposed in contiguous cooperable relationship with said clongated key stems of said plurality of operation control keys, to their lower positions wherein those ofsaid control slides which are located in their said first or their said second activating positions operably cooperate with their corresponding ⁇ function producing mechanisms to produce machine functions corresponding to said depressed operation control keys.
  • saiid support means additionally comprises: i v
  • a square stud fixed thereto in cooperating relationship with said latch portion of said first latch slideably mounted on said cycle initiatingmslide ⁇ said latch portion being blockably engagcablc with the uppermost or lowermost surfaces of said square stud, said square stud cooperating also with one of sadsidewalls of said second aperture of said cycle initiating slide to blockably limit said unidirectional biasing effect of said first spring 'on said cycle initiating slide; and b.
  • a cam having an abbreviated raised portion adjacent a cutout formed therein, said cam being rotatably mounted by means of a first stud fixed thereto and journaled within said support means;
  • a second spring connected to a limit stud fixed to said support means and to a second stud fixed to said cam at a point radially disposed of said first stud, said second spring serving to bias said cam in a predetermined rotational direction on said first stud;
  • a first roller rotatably mounted by means of an extended stud fixed to a first of said pair of interconnected bellcranks in cooperating relationship with said raised por tion and said cutout of said cam, said second spring being expanded to its maximum biasing power when said cycle initiating slide and said plurality of operation control slides are retainably located in their said upper home positions by said blockable contact of said latch portion of said first latch against said uppermost surface of said square stud, said first roller mounted on said first bellcrank in cooperation with said cutout of said cam serving to blockably limit said second spring against said maximum biasing power when said uppermost surface of said square stud is so engaged by said'latch portion of said first latch.
  • said cycling means in cooperation with said second roller being effective early in said complete cycling to activate said rotatable arm and said link and to thereby rotate said cam in a restorational direction and into a latched relationship with said offset lug of said second latch, said restorational rotation of said cam being effective to expand said second spring to its said maximum biasing power.
  • said bellcrank restoring means comprises a third spring connected to said support means and to a second of said pair of interconnected bellcranks, said third springheing effet-tive. in response to the withdrawal ofsaid latch portion of said lirst latch from said lowermost surface of said square stud by said cooperation of said cycling means andsaidpivot pawl carried by said cycle initiating slide, to restorably rotate said pair of interconnected bellcranks and to thereby' return said pair of grooved shafts and said slides to their normal home positions,

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
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  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Electrophotography Configuration And Component (AREA)
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US818867A 1969-04-24 1969-04-24 Easy depression control mechanism for a calculating machine Expired - Lifetime US3552643A (en)

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US81886769A 1969-04-24 1969-04-24

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US (1) US3552643A (enrdf_load_stackoverflow)
FR (1) FR2039435B1 (enrdf_load_stackoverflow)
GB (1) GB1239369A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3652010A (en) * 1970-11-09 1972-03-28 Ncr Co Totalizer control mechanism

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2861746A (en) * 1955-12-28 1958-11-25 Underwood Corp Control means for accounting machine
US3042300A (en) * 1955-12-29 1962-07-03 Underwood Corp Control mechanism for an adding machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2861746A (en) * 1955-12-28 1958-11-25 Underwood Corp Control means for accounting machine
US3042300A (en) * 1955-12-29 1962-07-03 Underwood Corp Control mechanism for an adding machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3652010A (en) * 1970-11-09 1972-03-28 Ncr Co Totalizer control mechanism

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FR2039435B1 (enrdf_load_stackoverflow) 1974-03-01
GB1239369A (enrdf_load_stackoverflow) 1971-07-14
FR2039435A1 (enrdf_load_stackoverflow) 1971-01-15

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Free format text: MERGER;ASSIGNORS:BURROUGHS CORPORATION A CORP OF MI (MERGED INTO);BURROUGHS DELAWARE INCORPORATEDA DE CORP. (CHANGED TO);REEL/FRAME:004312/0324

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