US2019505A - Keyboard perforator - Google Patents

Description

Nov. 5, 1935. A. H. REIBER KEYBOARD PERFORATOR Filed June 4, 1932 3 Sheets-Sheet 1 'INVENTOR ALBERT h. PE/BEB 2% A TTORN NOV. 5, 1935. A REIBER 2,019,505

KEYBOARD PERFORATOR Filed June 4. 1952 3 Sheets-Sheet 2 INVENTOR ALBERT H PE/BEB BY a f Ll\ iionwn I Nov. 5,-1 93 5. A. H. REIBER KEYBOARD PERFORATOR Filed June 4, 1932 3 Sheets-Sheet 3 INVENTOR ALBERT h. EEIBEB BY ATTORNEY Patented Nov.- 5, 1935 PATENT OFFICE KEYBOARD PERFORATOR Albert II. Beiber, Chicago, Ill., assignor to Tele type Corporation, Chicago, 11]., a corporation of Delaware Application June 4, 1932, Serial No. 615,329

14 Claim.

This invention relates generally to perforating apparatus and more particularly to keyboard perforators for the preparation of perforated strips which maybe utilized for the automatic control of machines.

The present invention has for its main object the provision of a perforator, which is of entirely mechanical construction and which comprises a cyclically operable means for effecting invariably the single operation of the perforator upon each initiation thereof.

Specifically, the keyboard perforator includes keylevers arranged in a manner characteristic of typewriters and has positioned operatively with respect thereto a group of selector elements which are arranged in pairs so that the depression of one element of each pair of elements through the depression of a keylever causes the operation of the other element of that pair in a reverse direction. These elements control the position of interference members also operated in varying permutations to control the selective operation of the perforating punches. The depression of each keylever also invariably operates a universal member which controls the initiation mechanically of a power driven operating means which is provided with an automatic, mechanical device for preventing more than one cyclic operation of the perforating apparatus pursuant to each initiation of operations. Thus, the apparatus of the present invention, being of entirely mechanical construction, is conducive to positive operation at very high speeds with extreme accuracy.

A betterunderstanding 'of the invention may be had from the following description, taken in conjunction with the accompanying drawings wherein:

Fig. 1 i a partial perspective view of a keyboard perforator embracing the features of the present invention.

Fig. 2 is a perspective view of the perforator selecting mechanism.

Fig. 3 is a longitudinal elevational view of the perforating selecting bar unit.

Fig. 4 is a longitudinal sectional view of the operating cam shaft.

Fig. 5 is a sectional view taken on the line 55 of Fig. 4 and shows the clutch release mechanism.

Fig. 6 is a view showing the control elements of the perforating mechanisms.

Fig. '7 shows an alternative arrangement of the perforating mechanism control means.

Referring now to the drawings wherein like reference characters indicate the same part throughout the several views and more particularly to Fig. 1, there is shown a keyboard unit and'a perforating unit indicated generally by the numerals II and I2 which are mounted on a common base l3. The keyboard unit mounted on the base l3, comprises a plurality of keylevers l4 extend- 5 ing from the rear of the base 3 to the front thereof and provided with keys |5.. In addition to the keylevers H, which may be referred to as character keylevers, there is also provided a space keylever l6 which extends in front of the other 10 keylevers.

As is more clearly disclosed in Fig. 2, the keylevers I4 and I6 are pivoted on a rod l1 and are normally upheld by springs l3. These keylevers, as previously described, are provided with keys l5 l5 and extend over a number of pairs of code bars l9 and 2| included in the perforator selecting unit indicated generally by the numeral 22. The bars l9 and 2| of each pair are supported, Fig. 3, by a pair of T-shaped rocker arms 23 and 24 mounted on pivot rods 25 and 26 and having oppositely off-set lugs 21 and 28, which uphold the code bars I! and 2| respectively of the corresponding pair of code bars. The rocker arms of each pair of code bars are pivoted to andrecip- 25 rocate a permutation bar 29, and these bars are connected to bars 3| pivoted on a rod 32.

Each keylever M is arranged to depress one of the code bars l9 or 2| of each pair of code bars and through the medium of the rocker arms 23 30 and 24 lifts the other code bars either to advance o'r retract the corresponding permutation bars 29 to impart corresponding movement to the associated pivoted member 3|. The permutation bars 29 are set in characteristic combinations and for this purpose the code bars l9 and 2| are provided with notched upper edges, the bars of each pair being complements; that is, the high portions of one bar are opposite the low portions of the other bar of the same general pair. It is also 40 noted that the code and permutation bars have no normal position and are moved back and forth by the keylevers. As is clearly apparent from Fig. 3, the bar I9 is raised and the bar 2| is depressed by certain keylevers. Also, since each key sets the code bar in its individual combinatlonal position, two keys cannot be completely depressed at the same time and any attempt to do so will bring the code bars to their mid-positions, which is, of course, anon-selecting position.

The pivoted members 3|, as more clearly shown in Fig. 6 which illustrates schematically the mechanism of the'perforating unit l2, coact with punch interference elements 33, there being one 5 hammer 31 is connected to an arm 38 pivoted on a shaft 39 through an adjustable connection 4|. The arm 38 is arranged to be operated periodically from a cam 42 mounted on a sleeve 43,

as will be more fully described hereinafter. Cam

42 is provided with'two similar cam surfaces since two complete operations are performed during one complete revolution of the cam; that is, for one complete cycle of 'operation the cam is permitted to rotate 180 or one-half revolution, thus enhancing the speed of operation of the apparatus. There is also secured to the actuator or hammer 31 a pawl 44 which cooperates with a ratchet wheel 45 secured to a shaft 45 which also carries a pin or feed wheel 41.

The pins of the wheel 41 cooperate with feed perforations in the tape for effecting its advancement to bring an unperforated area in alignment with the punches 34. When the actuator 31 is moved upwardly to perforate the tape in accordance with the selected punches 34, the pawl 44 is likewise moved vertically to a positionwhere it engages the next succeeding tooth on the ratchet wheel 45. The pawl 44 is pivotallysecured to actuator 31 and is connected thereto through a spring 48. Consequently, whenthe actuator 31 is returned to its normal position, or

' the position shown in Fig. 6, thepawl 44 will assume its normal position and in so doing will cause the advancement of the ratchet wheel 45 a distance of one tooth thereof and the corresponding advancement of the tape or strip 38. There is also associated with the punches 34 a V punch 43, referred to as the feed hole punch,

which isoperated each time the actuator '31 is operated, and regardless of the selection of the punches 34 for perforating the feed holes in the tape.

The pivot shaft 38 as shown in Fig. 6 is provided with an eccentric portion BI and has a handle 52 secured to its front extremity, Fig. 1; also cooperatively arranged onan integral collar of the shaft 39 are oppositely disposed notches 53 which cooperate with spring members 54 to hold the shaft in either of its set positions. By having the shaft 38 provided with an eccentric portion 5|, the arm 38 may be moved through the medium of the handle 52 out of operative relation with cam 42 and thus prevent the operation of the actuator 31 upon the rotation of cam 42.

Each key lever l4 in addition to actuating the code bars I 8 and 2| also'operat'es a universal bar 55, which like the code bars l9 and 2| is guided in a comb bar 58 and is also supported on and operates a pair of rocker arms 51 and 58, Fig. 5; but the universal bar has no complementary bar, and the rocker arms 51 and 58 which are pivoted on rods 58 and GI, respectively, are connected to a longitudinally movable bar 82 which is held in its normal left-hand position by a spring 83. Operatively associated with'the rocker arm 51 is and 84, slidable in a bushing, which cooperates with mechanism indicated generally by the numeral to control the rotation of sleeve 43. As-

sociated with rocker arm 58 and secured to a keylevers l4 must have covered at least 60% of 10 their length of travel before the universal bar. 55 is operated to effect the movement of the mechanism 85.

Having reference to Figs. 1, 4 and 5 it is noted that the operating cam shaft 88 is driven by 15 power communicated from a continuously rotating motor 89. The motor 63 has a pinion gear 1| which cooperates with a gear 12 secured to shaft 88 journaled in anti-friction bearings and appropriately mounted in uprights 13 and 14. 2o

' The shaft 88, which is driven continuously due to the corresponding rotation of gear 12, has rotatively mounted therewith the sleeve 43 which carries cam 42 for accomplishing the perforating function. The rotation of the shaft 88 in its 25 bearings is imparted to sleeve 43 through a combination friction and positive clutch 15. As shown in Fig. 4 the clutch 15 consists of a friction portion 16 and a positive or grab portion 11. Normally the positive or grab portion 11 is held 30 out of engagement with its operative part by means of a vertically extending member 18 cooperating with a cam 19; that is, with the member 18 cooperating with cam 19, the right hand portion of the clutch section 11, as viewed in 35 Fig. 4, will be moved out of engagement with the left hand portion thereof against the action of a spring 8l.- Also the friction portion 18 of the clutch 15 is normally rendered ineffective due to the engagement of diametrically oppositely dis- 4 posed members 82 and 83 with a. projection 84 which normally lies in the path of members 82 and 83 (Fig. 5). With this construction power from the shaft 68 is constantly and continuously applied to sleeve 43 through a collar 85 constitut- 5 ing a part of the friction clutch 18 and the members 82 and 83 which fit in slots formed in the periphery thereof. When the projection 84 is moved out of the path of the then engaged member 82 or 83, as will be described presently, the 50 friction clutch 18 is effective for transmitting power to sleeve 43. Sleeve 43 then rotates through a relatively small angle, and cam 19 is rotated with respect to member 18 such that the right hand portion of the positive clutch 11 55 is allowed to move to the left, as viewed in Fig. 4, by the action of spring 8|; whereupon the, teeth thereof engage the teeth of the left hand portion of the positive'clutch 11 which is integral with the shaft 68 and which consequently rotates 00 continuously. With the construction just described, the sleeve 43 is driven initially through v friction clutch 16 but, after it has rotated a few sitioned between the members 89 and 92 to the left of the pivot rod 8|. Consequently with the member 88 normally urged by a spring 94, the members 89 and 92 will be held firmly in contact with each other. When the universal bar 82 is operated, rod 84 is likewise operated and causes the movement of member 89 clockwise about pivot rod 8i, thus moving the shoulder thereof free of the projection 88 of pivoted member 88. With member 88 moved, as described, member 88, as well as the pivoted lever 81, will be rotated about their pivot 95 by spring 88, so that the projection 84 is out of the path of the then engaged member 83. Consequently, and especially with power continuously imparted from shaft 88 to friction clutch 18, sleeve 48 will be rotated. As it rotates, the positive clutch 11 will be engaged as previously described. When the cam collar 85 nears the completion of its half cycle" of rotation, the roller on pivoted lever 81 is operated by cam 85 for moving the member 88 and its projection 84 into the path of the next succeeding member 82.

After the universal bar 82 has moved to its normal position by the action of spring 88 which will occur when the key is released, the projection 88 will again engage the shoulder of member 88. However, if thekeylever is held depressed, which will result in maintaining member 88 in its rotated position about pivot 9|, the projecting portion 88 will engage shoulder 91 formed on the under side of member 92. Attention is directed to the fact that shoulder 91 is not in direct vertical alignment with the shoulder in member 89, but is disposed slightly to the left thereof (as viewed in Fig. 5), the purpose of whichis to insure the operation of member 81 by its spring 98 to effect the withdrawal of projection 84 from the path of member 83 when projection 88 is disengaged from the shoulder on member 89. So, when 'a keylever is held depressed, member 89 will be held in its clockwise position and member 81 will be rotated in a clockwise direction by the collar cam 85 sufliciently to permit the engagement of shoulder 81 with projection 88 and also effect the engagement of projection 84 with a member 82 or 83; then, when the keylever is released the members 89 and 82 will be rotated counterclockwise by spring 94 and the projection 88 will slide off of shoulder 91 onto the shoulder on member 89. Whether the projection 88 engages the shoulder on member 89 or member 92, the projection 84 will be moved into the path of the next succeeding member 82. By the arrangement of the members 89 and 92 with their notches as described, thus forming a double trip-off latch, the repetition of the operation is prevented and a subsequent operationof the universal bar 82 is necessary to effect the release of the clutch mechanism. In other words, if a keylever is depressed for a period longer than a half cycle of rotation of sleeve 48, the sleeve 43 will be invariably arrested due to the arrangement of the members 88 and 92. Of course, as the sleeve 48 approaches the completion of its half cycle of rotation, cam

19 cooperateswith projection" and effects the disengagement of the positive clutch 11 or moves it to the position shown in Fig. 4.

. the sleeve 48.

General operation Inasmuch as the details of the apparatus have been described and since a further understanding of the structure constituting the present invention can be obtained from a detailed description of its operation, such a description follows:

Referring to Fig. 1, the tops i8 of the keylevers i4 carry indicia (not shown) analogous to the well known typewriter keyboards wherein two sets of designations are used, one for the lower case and the other for the upper case. However, in the operation of the perforator the same key is operated and the same code combination of perforations is obtained for both the letters or indicia carried on a keytop, and as is well known the general practice is to distinguish between upper and lower case characters by means of special code combinations for upper case and lower case, or figures or letters" shift as it is also called.

Assuming that a character keylever i4 is operated, one of the bars 18 or 2! of each pair of such bars, depending upon which bar is in a vertical position, is actuated and causes the permuted operation of the selector bars 28. The selection of the bars 29 will effect the rotation of the pivoted members 8i and the movement of the punch interfering bars 89, Fig. 6, in corresponding permuted combinations. Likewise the operation'of the code punch pins 34 and the feed punch pin 49, the former in accordance with the position of the punch interfering bars 92, is determined by cam 42 mounted on sleeve 42.

Sleeve 48, as previously referred to, is driven through a friction clutch 18 and a positive clutch 11 which are rendered effective upon the operation of universal bar 88, Fig. 5, operative on a spring pressed member 82. The universal bar 88 is operated simultaneously with the operation of any of the character keys, but has its movement adjusted or rather determined to.control predeterminedly the operation of mechanism controlling the release of the clutch 18. This particular mechanism is more clearly disclosed in Fig. 5 and operates upon the vertical movement of rod 84 through its bushing to move member 89 sufliciently to release the projection 88 from its shoulder. Projection 88 will at this time escape shoulder 91, due to the aforementioned fact that shoulder 91 is not aligned with the shoulder on member 89. With projection 88 free of the shoulder of member 88, spring 88 rotates member 81 about its pivot 95 removing the projection 84 from the path of the member Power, of course, is continuously applied to the friction clutch 18 through the shaft 88 from the motor 89 and the interconnecting gears, so that when the projection 84 is moved out of the path of member 83, the driven portion of the friction clutch will rotate. The sleeve 48 being secured to the driven portion of the friction clutch 18-will likewise rotate and carry with it cam 18 (Fig. 4) which normally effects the disengagement 'of the friction clutch 11, but

after rotating a few degrees spring 8| is effective 65 for causing the engagement of the clutch 11 and the transmission of power from the shaft 88 through the positive clutch 11 to effect a positive drive connection between the shaft- 88 and 42 which operates through arm 98 or hammer 81 and eifects the perforation of the tape or strip 88 in accordance with the position of the punch interfering bars 89, as is well understood Sleeve 43 carries with it the cam 70 by those familiar with the operation of perforators, and the feed hole punch 48. The movement of the hammer 81 in a vertical direction causes the pawl 44 to engage the next succeeding tooth on the ratchet 48' so that upon the positive restoration of the arm 88, the ratchet 45 will be advanced a distance corresponding to one tooth thereof and will cause the corresponding rotation of the tape advancing wheel 41. The tape accordingly willbe advanced to bring an unperforated area thereof; in alignment with the punch pins 84 and 49'.

the driven member of the friction clutch 18, continues its rotation, cam I9 engages the vertical post I8 and causes the disengagement of "travel to permit the projection 88 to clear both the shoulder 91 and the shoulder on member 89, the purpose of which has already been described. The previously depressed key being released, the

, universal bar 55 will be restored to its normal achieve the same result as if the projection 88 engaged the shoulder on member 89. Consefluently, the sleeve 43 will be arrested invariably for each one-half cycle of rotation thereof.

When .the keylever is finally released and the.

universal bar 55 is restored .to it's normal position, the members 89 and 92 will assume their 'norni'al position by the action of the associated springs and the projection 88 will thereupon engage the shoulder of the member 89. By the arrangement of the structure in the manner disclosed the continued rotation of; the sleeve 48 in the event of the prolonged depression of a keylever will befprevented, and, consequently, the false operation of the perforator will be avoided. When the space key It is depressed the space k'eylever 88 is actuated and the pairs. of code bars I8 and 2| are operated to set the bars 28 in different i. combinations whereby the punch interference bars 38 are set permutably to effect the corresponding perforation of the'tape 88.

d fi a i In Fig. .7 is illustrated an alternative arrangement for moving arm 38 of the perforating.

mechanism out of operative engagement with cam 42. Theconstruction here shown is conductive to speedier operation since the operator need only swing the vertically extending thumb portion IIII to the right or left. insteadof operating handle 82 by a twist of-the..wrist. Lever IN is pivoted at I02 and is a part of a toggle comprising also link lll8'connecting lever IIII with-a lever I04 fixedly pivoted at I85. The pivotal connection between lever IM and link I08 comprises a pilot screw I08 the extended or stud portion of which operates in a hole I01 to define the limits'of movement of the toggle. Lever I84 is provided with a rightwardly extending arm to which is. pivotally carried the perforator oper ating arm 88. When the toggle "assumes the extended position shown in solid lines, in Fig. 7; the arm 88 is operated vertically into engagement with cam 42,=and when the toggle assumes its dotted line position arm 38 is lowered and thus removed from operative engagement with cam 42 which operation is analogous to that described in connection with the construction shown in Fig.6."" I

Although the present invention has been disclosed and described with reference to keyboard tape perforators it is, of course, understood that the invention is'capabie of embodiment in many and widely varied forms other than that specifitally disclosed without departing from the spirit 15 and scope of the present invention.

What is claimed is:

1. In a keyboard perforator, a plurality of key-" levers, a plurality of permutation bars, perforat ing elements, an interference member individual to each of said bars and set in varying combinations upon the operation of said permutation latch responsive to the operation of a keylever for releasing said power driven element and operated cyclically for rendering said power driven element ineffective.

2. In a keyboard perforator, a perforating device, a plurality of keys adapted to control the perforating device variably, power driven means for operating the perforating device, means to initiate the operation of said means, and, means located between said keys, and the power driven means including a pair of latches severally coactive with said second recited means to insure the limitation of operation to a single cycle irrespective of the duration of operation of said keys.

3. In a keyboard device, a plurality of keys, a 40 constantly rotating shaft, a perforating device,. solely mechanical means carried on said shaft 'to operate said perforating device, means controlled by said keys to initiate the operation of said means, and means comprising a double tripoff latch to determine invariably the cyclical operation of said device.

4. In a keyboard device, a'plurality of keys, a constantly rotating shaft, a perforating device, solely mechanical means carried by said shaft to operate said perforating device, release means controlled by said keys to initiate the operation of said means, and other meanscomprising a double trip-off latch eifective independently of said means to define the limits of operation of said perforating device, each of said keys effective for initiating through the instrumentality of said other means solely a single cycle of operation of said perforating device for each effectiveness thereof.

v 5. In 'a keyboard device, a plurality of keys, aflrst element operable by each of the keys, a second element operable in cycles, means-conitrolledby said first element to initiate the operaa pair of latches severally coactive with said first recited 'nie'ans to limit the operation of said second v element to a single cycle.

6. In a keyboard device, a series of keys, a first element operable by each of the keys, a second element operable'in cycles, means controlled first component and a second component, means whereby said first component is normally operative to limit the operation of said second element, and means to render said second component operative upon the inefiectiveness of said first component to insure said limitation of operation.

'1. In combination in a keyboard device, a perforating mechanism in a plurality of punch elements, a plurality of keys, aset of permutation bars adapted to be permutably operated by said keys to control the operation of said mechanism, a universal bar invariably operated by said keys, a constantly rotating shaft, means carried by said shaft to operate said mechanism, a triotion clutch adapted to be operatively associated with said means during its complete cycle of operation, a positive clutch adapted to be operatively associated intermittently with said means, means operated by said universal bar to connect through the instrumentality of said clutches ,said mechanism to said shaft, means to render said positive clutch effective only during the effectual period of operation of said first mentioned means, and means independent of said elements and effective independently of, said first mentioned means to disable said perforating mechanism.

8. In a keyboard device, a series of keys, a uni- I versal element, aplunger operable by each of said keys through the instrumentality of said element, a bell crank lever, power driven cam means coacting with said bell crank lever, release means controlled by said plunger to efiect through said bell crank lever the initiation of operation of said cam means, and automatic means comprising a double trip-ofl latch effective invariably to determine the cyclic operation of said cam means.

9. In a keyboard apparatus, a series of keys, a perforating device, means controlled by said keys to initiate the operation of said device, said means including a first component and a second component, latch means normally adapted tocoact with said first component and to escape said second component, and means to render said latch means cooperative with either component to determine the cyclic operation of said device.

10. In a keyboard perforator, a plurality of keylevers, a plurality of permutation bars, perforating elements, an interference member individual to each of said bars and set in varying combinations upon the operation of said permutation bars, means for operating said elements as selected by said members including a power driven element, release means comprising a springbiased bell crank lever, and a pair of latches recranrtcirr or CORRECTION.

Patent No. 2, 019, 505.

sponsive to the operation of a keylever for releasing said power driven element, said pair of latches adapted to be severally coactive with said bell crank lever to effect invariably a single cycle of operation of said first recited means.

11. In a keyboard device, a series 01 keys, a plurality of elements, means operative on said elements, and means controlled by said keys to initiate the operation of said means including a pair of pivoted members arranged with oppositely disposed irregular surfaces and a latch element positioned between said members and cooperating with the irregular surfaces thereof to hold initially said first recited means ineffective and subsequently if any of said keys are held operated. v

'12. In a keyboard apparatus, a plurality oi keys, a device comprising a plurality of operable elements, means including a first component and a second component controlled by said keys to initiate the operation of said device, latch means normally coactive with said first component and non-coactive with said second component, and means to render said latch means coactive with either componentto determine the cyclic operation of said device.

13. In a keyboard apparatus, a series of keys, a mechanism comprising a plurality of operable elements, means including a first component and a second component controlled by said keys to initiate the operation of said mechanism, latch means normally coactive with said first component and adapted normally to escape said second component, and means to render said latch means cooperative with either component to de- 3 a device comprising a plurality of operable elements, means controlled by said keys to initiate the operation of said device, said means including a pair of pivoted members arranged with oppositely disposed stepped surfaces, means adapted normally to bias said members into contactual engagement whereby said surfaces are presented in oflset relation to each other, a latch element positioned between said members, said element normally adapted to coact with one of said members and to escape the other of said members, and means to render said element cooperative with either of said members to determine the cyclic operation of said device.

ALBERT H. REIBER.

November 5, 1935.

ALBERT 1i. RElBER.

line 63, for the syllable 7, claim 7, for "in" read including; and that be read with these'corrcctions therein that the same may of the case in the Patent Office.

' Signed and sealed this 10th day of printed specification of the Page 4, first column,

5, first column, line the said Letters Patent should conform to the record,

December, A. D. {1935.

LeslieFrazer Acting Commissioner of Patents.

whereby said first component is normally operative to limit the operation of said second element, and means to render said second component operative upon the inefiectiveness of said first component to insure said limitation of operation.

'1. In combination in a keyboard device, a perforating mechanism in a plurality of punch elements, a plurality of keys, aset of permutation bars adapted to be permutably operated by said keys to control the operation of said mechanism, a universal bar invariably operated by said keys, a constantly rotating shaft, means carried by said shaft to operate said mechanism, a triotion clutch adapted to be operatively associated with said means during its complete cycle of operation, a positive clutch adapted to be operatively associated intermittently with said means, means operated by said universal bar to connect through the instrumentality of said clutches ,said mechanism to said shaft, means to render said positive clutch effective only during the effectual period of operation of said first mentioned means, and means independent of said elements and effective independently of, said first mentioned means to disable said perforating mechanism.

8. In a keyboard device, a series of keys, a uni- I versal element, aplunger operable by each of said keys through the instrumentality of said element, a bell crank lever, power driven cam means coacting with said bell crank lever, release means controlled by said plunger to efiect through said bell crank lever the initiation of operation of said cam means, and automatic means comprising a double trip-ofl latch effective invariably to determine the cyclic operation of said cam means.

9. In a keyboard apparatus, a series of keys, a perforating device, means controlled by said keys to initiate the operation of said device, said means including a first component and a second component, latch means normally adapted tocoact with said first component and to escape said second component, and means to render said latch means cooperative with either component to determine the cyclic operation of said device.

10. In a keyboard perforator, a plurality of keylevers, a plurality of permutation bars, perforating elements, an interference member individual to each of said bars and set in varying combinations upon the operation of said permutation bars, means for operating said elements as selected by said members including a power driven element, release means comprising a springbiased bell crank lever, and a pair of latches recranrtcirr or CORRECTION.

Patent No. 2, 019, 505.

sponsive to the operation of a keylever for releasing said power driven element, said pair of latches adapted to be severally coactive with said bell crank lever to effect invariably a single cycle of operation of said first recited means.

11. In a keyboard device, a series 01 keys, a plurality of elements, means operative on said elements, and means controlled by said keys to initiate the operation of said means including a pair of pivoted members arranged with oppositely disposed irregular surfaces and a latch element positioned between said members and cooperating with the irregular surfaces thereof to hold initially said first recited means ineffective and subsequently if any of said keys are held operated. v

'12. In a keyboard apparatus, a plurality oi keys, a device comprising a plurality of operable elements, means including a first component and a second component controlled by said keys to initiate the operation of said device, latch means normally coactive with said first component and non-coactive with said second component, and means to render said latch means coactive with either componentto determine the cyclic operation of said device.

13. In a keyboard apparatus, a series of keys, a mechanism comprising a plurality of operable elements, means including a first component and a second component controlled by said keys to initiate the operation of said mechanism, latch means normally coactive with said first component and adapted normally to escape said second component, and means to render said latch means cooperative with either component to de- 3 a device comprising a plurality of operable elements, means controlled by said keys to initiate the operation of said device, said means including a pair of pivoted members arranged with oppositely disposed stepped surfaces, means adapted normally to bias said members into contactual engagement whereby said surfaces are presented in oflset relation to each other, a latch element positioned between said members, said element normally adapted to coact with one of said members and to escape the other of said members, and means to render said element cooperative with either of said members to determine the cyclic operation of said device.

ALBERT H. REIBER.

November 5, 1935.

ALBERT 1i. RElBER.

line 63, for the syllable 7, claim 7, for "in" read including; and that be read with these'corrcctions therein that the same may of the case in the Patent Office.

' Signed and sealed this 10th day of printed specification of the Page 4, first column,

5, first column, line the said Letters Patent should conform to the record,

December, A. D. {1935.

LeslieFrazer Acting Commissioner of Patents.

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