US2920754A - Control unit for composing machines - Google Patents

Description

A. F. LINDBERG 2,920,754

CONTROL UNIT FOR COMPOSING MACHINES Jan. 12, 1960 3 Sheets-Sheet 1 Filed Oct. 20, 1958 INVENTOR ATTORNEY ARTHUR F. LINDBERG Jan. 12, 1960 A. F. LINDBERG CONTROL UNIT FOR COMPOSING MACHINES 3 Sheets-Sheet 2 Filed Oct. 20. 1958 AT TORNEY Jan. 12, 1960 LINDBERG 2,920,754

CONTROL UNIT FOR COMPOSING MACHINES Filed Oct. 20, less s Sheets-Sheet 3 35 7 FIG. 3 k =\I 93 W mum m I B7 6 O INVENTOR ARTHUR F. LINDBERG BY ATTORNEY United States Patent CONTROL UNIT FOR COMPOSING MACHINES Arthur F. Lindberg, Chicago, Ill., assignor to Fairchild Camera and Instrument Corporation, Syosset, N.Y., a corporation of Delaware Application October 20, 1958, Serial No. 768,210

14 Claims. (Cl. 199-18) 'This invention pertains to improvements in automatic control devices for linecasting and composing machines.

Generally, the present invention features an automatic control mechanism applicable to standard types of linecasting machines without changing the manual operating features and retaining other characteristic features of these machines.

The principal object of the invention is to provide in an automatic control mechanism for composing machines a selector mechanism featuring elements arranged to pivot about a plurality of pivot points, whereby high speed operation of the composing machine is facilitated.

Specifically, the automatic control mechanism is controlled by a perforated control form or tape which may be prepared by the operation of a machine such as disclosed in Patent No. 2,059,250, granted November 3, 1936, to H. L. Krum, and which is fed through a record reading device wherein there is provided a plurality of feeler members, each one of which corresponds to a position in the tape that may or may not be provided with a perforation depending upon the particular code combination that is being read or sensed. Upon each momentary arrest of the control form the several feelers sense the code combination perforated in the particular position, and upon the next movement the combination is transferred to an intermediate set of storage devices following which a set of code bars are also positioned in accordance with such code combination. In the preferred practice of the present invention the code bars are provided with notches on both top and bottom edges thereof and in this manner they accommodate a double alignment of selectable elements. The selectable elements are alternately and oppositely disposed with respect to each other in scissors-like fashion constituting two rows which are movable toward each other when urged into selected position. For each permutation of code bars one and only one of these selectable elements may be placed into selected position and when any particular one is thus selected it actuates an associated interponent member to a position between an intermittently operated striker bar and a corresponding one of a'plurality of keylever actuators. With the structure according to the present invention, the interponents are pivoted by the selectable elements to bring an actuating extremity of the interponents into the path of the striker bar which then seizes control of the interponents to permit the selectable element associated therewith to be pivoted about a second pivot so that the selectable elements may respond to the succeeding selection and thus provide an overlap. The motion of the striker bar is imparted through the keylever actuator to the particular keylever as a sharp staccato blow simulating the touch of the operators finger when the keyboard is manually operated.

A better understanding of the present invention will be obtained from the following description taken in conjunction with the accompanying drawings wherein:

Fig. 1 is a transverse sectional view through the keyice board and matrix release mechanism of the composing machine illustrating the selector mechanism according to the present invention;

Fig. 2 is a longitudinal cross-sectional view through the record reader mechanism and associated parts, and

Figs. 3 to 6 inclusive, are detail sectional views illustrating the operational stages in the automatic operation of a keylever.

Since the disclosure herein set forth is in the nature of an improvement of the control unit disclosed in US. Patent No. 2,091,286 issued August 31, 1937 to H. L. Krum et al., only so much of the mechanism of the patented structure will be hereinafter set forth as is necessary to an understanding of the present invention. Reference may be had to said patent for a full understanding of the control unit not described hereinafter in detail.

Having reference to Fig. 1, wherein is shown a crosssectional view of a linecasting and composing machine embodying a control unit according to the present invention, there is provided a main framework 21 (of the control unit), more fully described in said Patent No. 2,091,- 286, and which is mounted beneath the standard keyboard 22, customarily provided with linecasting and composing machines, in a manner indicated in said Patent No. 2,091,286. While in the case of the majority of the weight bars 23 there is provided not only a manually operated keylever 24 but also an independent automatically operated lever 27, it will be noted that this is not true in the case of those characters whose manually operated keylevers are situated in the lower two rows of the six horizontal rows of keylevers. In the case of these two rows of keylevers, instead of providing separate automatically operated levers 27, each keylever 24 has been modified by the addition thereto of an offset portion 26 generally similar to the corresponding portions 26 of the keylevers 27, but in this case integrally formed with the manually operated keylevers.

Referring now to Fig. 1, wherein a typical cross-section through the selector and matrix release mechanisms is indicated, attention is directed to the standard keyboard construction in particular contemplation of which this structure has been designed. Keylevers 24 pivoted on shafts 25 are suitably articulated to move members or weights 23 as at 29 admitting of considerable lost motion at their several points of articulation by virtue of excess clearance 31. A particular touch is obtained by providing a uniform leverage ratio in all of the keylevers, although, as is readily seen, each horizontal row proceeding downwardly is progressively longer than its preceding one. The weights 23 are provided with several notches 31 so as to be adaptable to standard replacement in connection with other of the several keylevers. Additional keylevers 27 pivoted at 32 are mounted for engagement with the lowermost notch 31 of certain of the several weights 23 and are provided with offset extensions 26 that protrude through a panel 33 of the keyboard. Thus, it will be seen that as to the release of matrices controlled by keylevers in the upper four rows, Fig. 1, either the manual control levers 24 or the automatic control levers 27 may be operated independently and that in so doing, the other or unoperated of the two remains inert and does not in any way enter into motion either associatively or collaterally, but as to the release of matrices controlled by the keylevers in the lower two rows a single lever is utilized for operation both manually and automatically.

An alignment of bell crank levers 35 fulcrumed on a common shaft 36 is disposed to overlap the aforementioned extensions or portions 26 so as to engage them when rotated clockwise and against the action of individual springs 37. cranks 35 register opposite certain ones of a correspond- Pa tented Jan. 12, 1960 The vertical arms 38 of the bel l ingly plurality of 'interponents or push bars 39 of the improved selector mechanism 40, according to the present invention, the operation of which is controlled in the followingmanner;

Havingreference. to- Fig.1 2, there is .showma record.

reader, indicated generally as 41, which through. a.trans-. fer. mechanism 42.. controls. thfibrPPIIIllltQIll/B setting of-.a

series of.intermediate.bars..43, which in turn..controlithe.-

permutative. setting, of. a: series-of permutation. code..bars 44. Code. bars .44 control the. selection .ofa group. of.'.se= lectable bars 45 which in turn control the push. bars or interponents 39 to. effectuate. the. selective. operation. of bell cranks. 35;

The .record .reader 41Jcompn'ses :a set of feeler. levers- 46.. (six.' in. the. present. instance.),. so. called because of.

partof. a bell crankstructure 52' which also is actuated" by theshaft 53 through acam 54 and roller 551 Feeler levers 46 are each provided witha pair of'depending ,portions 56. and 57 and counterclockwise bias is normally. imparted to levers 46 by individual springs 58. Portions56 and.57' are adapted to cooperatewitha pair. oflabutments 59 and 61 on associated onesofacorrespending series'of transfer T-levers 62mounted"pivota'lly ona pivot .stud 63 fixed to one arm ofa b'ell'crank lever 64=pivoted at 65, the shortarm of which abuts. a 's'hort arm of another bell crank lever 66 also pivotedat 65', the. other end of which carries a roller 67 'spring urged by a spring 68'to follow the peripheral surface ofacam 69 secured .to the shaft53.

The. abutments 59 and 61 are so spaced apart that when either of the two portions 56 or 57 is brought into registration with its associated abutment 59or 61 the other of the shoulders or portions 56 or 57 just clears its associated abutment 59' or 61 on T-lever 62. Peeler levers 46 are provided'with an intermediate orifice 71 havingsufficient clearance with respect to a fixed rod 721positioned'thereinto so as to permit ofa slightreciprocative motion by the levers 46. In its limitof movement each feeler lever 46" may be-pcsitioned so that one or the other of its shoulders 56 .or' 57 is brought into register with its associated abutment 59 or 6 1. Thecam 69"has a gradually ebbing apex and when it is rotated action of bell crank 52' and lever" 6'4 66- the set of feelers 46 will first be permitted-to rotate countercl'ock wise' during which time those whose pins 48 are not blocked by'the tape 76, but which are brought into registration with a perforation thereof; will be permitted to rotateuntil their'respective shoulders 57'register opposite the abutment lugs 61 while the others which are not permitted to do sowill remain in position with their shoulders 56 in" registration opposite the abutment lugs 59% Immediately followingthis' condition, the cam' 69 m'oving lever-64-66counterclockwise forces the-several T- levers" 62 into engagement" withtheir respectivefeelerlevers 46 and, depending upon which ofthe two po'siti'ons the feelerievers happen to assume, T-levers 62, upon being rockedabout pivot 63, will be correspondinglypositioned and wil-limpait a similar positionment to theirassociated" bars 43. In this manner-the combinationof' perforations prcsent in ea'ch transverse-alignment in the tape is trans- Levers. 46. are. provided.

lated simultaneously to the six code bars 44. Following each such translation the tape 76 is stepped forward until another transverse alignment of perforations is brought into registration with the feeler pins 48. This stepping is accomplished by a pawl 77 and ratchet wheel 78 under the control of a cam (not shown) on shaft 53, in a manner disclosed in the aforesaid-US: Patent No. 2,091,286. Theratchet wheel 78zis securedtoa shaft 79which: also carries a sprocket wheel 81 having teeth especially adapted to register-with thecentral longitudinal row of" perforations of thecontrol" tape in. accordance with the well known practice. In this manner, the single shaft 53 operates' all. of thet-mechanicalagencies. that control the record reader mechanism.

Particular attention is directed tothe fact that while the several feeler levers 46 are brought back to a normal or starting position at some definite point in each cycle of operation, yetthe.v transfer levers 62 and their. articulatedslide bars43. are not so restored, but may be set in conformity with a. newcode combination regardless. of

their previousposition. Thispracticepermitsof an over. lap inthe operationof thetwo sets of. levers'andallowsthe. codebars 44rmaximumtime of restduring each cycle.

of operation.

Referring to Fig, 1, the code bars: 44, as previously mentioned, are. provided with notches on both top and bottomedges. thereof, andin this manner they accommodate. a double alignment of selectable. elements 45 each of which is mountedv pivotally at 82 on its companion interponentor. push bar 39, which in turn is pivotally carried on; a common.pivot.sha f t.83. Confronting pairs. of. selectable. elements 45 arenormally biased toward.

eachother by. individual springs 84. The selectable elements45are. provided'witha sensing edge 85 cooperable with code. bars 44, anda spreader cam follower edge: 86 cooperable with. aspreader cam shaft87. The elements 45. normally tend tomove into selective engagement with the code bars 44 but are restrained therefrom by the spreader. cam 87, as set forth in said US. Patentv No. 2,091,286., Cam shaft. 87 is. provided with two longitudinal cam surfaces 88 and in rotating counterclockwise, during each half revolution thereof, the spreader.

cam.shaft.87 tends to spread the selector elements 45.

bars. 44 and foreach. permutative condition of the severalv code bars 4.4, an individual alignment of notches isat: forded into which the adjacent portion or sensing edge 85 is permitted to. drop, asiswell known in the art. As indicated in Figs. 1 and 2 to 6, notches 91 located in the selectable elements 45 are provided adjacent the spreader cam 87, so as to permit a sudden drop by a selectable element 45 when. the cam portion 88' passes under it. This practice allows greater time for the selectable elements 45 to be disposed in position for operation and also hastens its presentment thereinto relativev to an operative cycle.

In accordance with the present invention, the inter;-

ponents 39'are' carried on'a common pivot shaft 83 and Each interponent 39 is provided situation the selectable element 45 transfers the entire force of the spring 84 to the interponent 39 through the pivot stud 82 and its abuttal support on the stud 93, and consequently, the interponent 39 is urged to rotate in a counterclockwise direction with the selectable element 45 (as viewed in Fig. 1) about the pivot shaft 83 until the cam follower edge 86rests on the apices 88 of the spreader cam 87.

Then, as the spreader cam 87 rotates counterclockwise to the position shown in Fig. 3, the selector elementinterponent combination 4539 rotates as a unit in a counterclockwise direction until the top edge 97 of the hook portion 94 comes to rest on the striker bar 95. Thus, Fig. 3 depicts the selectable element-interponent combination 4539 in the fully selected but unoperated position.

In Fig. 4, the selectable element-interponent combination 4539 is shown in its selected'and operated position. This condition is similar to that shown in Fig. 3 except that the striker bar 95 has moved to the left, pulling with it the selectable element-interponent combination 45'39 by means of the hook portion 94. This movement of members 4539 is facilitated by the slidable relation between shaft 83 and slot 92, and clockwise rotation is imparted to the associated bell crank 35, and accordingly, the associated keylever has been operated through its extension 26. That is, as a bell crank 35 is thus operated, it acts to depress the end 26 of lever 27 to, in turn, raise the weight 23 articulated thereto to operate the trigger 101 (Fig. l) to initiate the matrix selection function. This is accomplished by rotating trigger 101 counterclockwise until it ceases to support its cam yoke 102 whereupon the latter member drops until the peripheral teeth 103 of cam 104, which is pivoted between the tines of said yoke, engage a continuously rotating rubber roller 105. The engagement between the teeth 103 and the roller 105 imparts a clockwise motion to the cam 104 which, on account of its eccentricity raises ycke 102 until its remote end 106 abutting a release reed 107 imparts a timed stroke through the matrix release mechanism, illustrated generally at 108, whereupon it is again supported by the trigger 101 pending another release movement. a

The purpose of the timed release mechanism, as is generally known, is to permit ofsufficient time in the magazine trip 108 withouthaving to expend the same amount of time in depressing a control key 24 or 27. The imperativeness of such an element of delay is made of principal importance in view of thefact that the matrices are re-released and allowed to gravitate into assembled relation, for without such, and particularly under the speed of automatic control, a direct release meansmight be actuated and be restored to normal position before its matrix has had time to move from its magazine 109. One of these overlap mechanisms is provided with each of the levers 27 whose function it is to release a matrix 111 from the magazine 109.

In Fig. 5 the interponent 39 is shown fully operated. A feature of the invention resides in the hook-type engagement between the striker bar 95 and the interponent 39, exemplified by the undercut shoulder or bevel 94 of the interponent 39 cooperating with the knife-edge or inwardly directed bevel of the striker bar 95. This interlocking engagement between the interponent 39 and the striker bar 95 so directs the force of the striker bar 95 orithe interponent 39 that the interponent 39 will be held in engagement with the striker bar 95 without astween the interponent 39 and the striker bar 95, the interponent 39 remains in locked engagement with the striker bar 95 during most of the cycle of reciprocation of said bar 95. Therefore, when the spreader cam 87 is rotated to the position shown in Fig. 5, the selectable element 45 associated with the locked interponent 39, will be rotated clockwise about the pivot stud 82 secured to interponent 39 due to the fact that the interponent 39 is locked against rotation about its pivot shaft 83. Thus, as shown in Fig. 5, the spreader cam 87 has lifted the sensing-edge 85 of the selectable element 45 high enough so that the sensing edge 85 clears the code bars 44, and the code bars 44 can therefore be shifted or transferred to a new code arrangement or permutative setting. This advantageous operative condition is not possible with existing similar devices.

There is also disclosed in Fig. 5, a significant change in the force pattern exerted by the selectable element 45 on the interponent 39. When the shoulder 98 rests on or abuts the stud 93, the selectable element 45 applies a counterclockwise couple to the interponent 39 as indicated in Figs. 3 and 4. However, in Fig. 5 the left end or follower edge 86 of the selectable element 45 is resting on the spreader cam 87 instead of the shoulder 98 resting on the stud 93. In this situation, the selectable element 45 reacts to the right and upward on the interponent 39 at the pivot 82. This latter resultant, when coupled with a reaction force from the fulcrum shaft 83, urges the interponent 39 to move to the right and in a clockwise direction about the pivot or fulcrum shaft 83. Thus, with the cooperating interlocking angular relationship between the shoulder 94 and the forward edge of the striker bar 95, as previously described, it is seen that the engagement therebetween is assured.

Fig. 6 illustrates the condition just before the striker bar has reached the end of its return travel (rightwardly). The load of the bell crank 35 has been relieved, but the interponent 39 maintains its interlocking engagement with the striker bar 95. Then, as the striker bar 95 reaches its extreme rightward or non-operated position; for example, as shown in Fig. 1, the interponent 39 will be released, and since the force at pivot 82 is upward, as previously described, the interponent 39 will be caused to rotate clockwise about its pivot shaft 83 until the stud 93 thereon abuts or strikes the shoulder 98 of the selectable element 45. Thus, the striker bar 95 has receded to its non-operated (rightward) position, and the interponent 39 has been lifted free of the striker bar 95 and into its unselected position.

In Figs. 3 to 6 inclusive, both the upper and lower selectable elements 45 have been shown in their selected positions, which is a possible condition, well known in the art for add-thin-space operation, as exemplified in U.S. Patent No. 2,770,356, granted to A. F. Lindberg, wherein two elements; namely, a space band and a thin space matrix may be selected in response to a single code combination. However, it is manifest that the selectable element 45 may be selected singly, and in the foregoing description, the upper selectable element 45 and its coman actuator, said interponents and said actuator having interlocking facilities, whereby said actuator is adapted to engage and operate a selected interponent, a plurality of members, each of said members juxtapositioned to'an interponent and adapted to have spaced abuttal and 7, pivotal' supportsthereon, said members individually selectable in accordance with the-permutative setting of said bars; spring elements for biasing-said members toward said permutation bars, said spring elements effective simultaneously' through said abuttal and pivotal supports torotate the associated interponent into operative relation with said actuator,- andcam means for normally holding said members away from said bars to enable the permutative setting thereof, said cam means effective cylindrically for rotating-said member about its pivotal support and away from said abuttal support to withdraw said memberfrom said per-mutation bars priorto the release of said interponent from said actuator, wherebyan overlap of operations in said control unit is facilitated;

2-. In combination; aset-of permutation-bars, a slidably and pivotally mounted interponent, an actuator, said interponent and said actuator having interlocking facilities, whereby said actuator is adapted to engage and operate said interponent, a member juxtapositioned to said interponent and having spaced abuttal and pivotal supports thereon, said memberselectable in accordance with the permutative setting of said bars, spring meansfor biasingsaid membertoward said bars, said spring means effective simultaneously through said abuttal and pivotal supports to'rotate said interponent into operativerelation with-saidactuator, and cam-means for normally holding said member-s away fromsaid-bars to enable the-permutative setting thereof, saidcam means effective-under certain-conditions of" operation torota-te said member-about its pivotal support and away from its abuttal support to withdraw said member from saidbarsprior to the releaseofsaid interponentfromsaid actuator,- whereby an overlap ofopera tions is facilitated;

3. In combination, permutation selector means, a slidably and pivotally mounted interponent, anactuator, said interponent and said actuator having interlocking-facili- -ties,. whereby said actuator is adapted-to engage and operate saidinterponent, a memberjuX-tapositioned to said inter-ponent and having spaced abuttal and. pivotal supports thereon, said member selectable in accordance with the selective condition of said-selector means, means forbiasing said'. member toward said selector means, said biasing=meanseifective simultaneously through saidabuttal and pivotal supports to rotate saidinterponentinto operativerelation with said actuator, and'cam means normally effective to preclude selective operation of said member, said cam means effective under certain conditions: of 'operation to-rotate said member about its pivotalsupport: and awayfrom its abuttal support to-withdraw said member from selective operation with said selector means prior to; the disengagement of said interponent fromsaid actuator, whereby an overlap between theoperation' of! said selector means and the reoperation of said inter-ponent is facilitated.

4!. In combination, permutation selector means, aninstrumentality to be operated, aslidably and pivotally mounted;first member, an actuator; saidfirst member and said actuator-havinginterlocking facilities, whereby said actuator is: adapted toengage said first member to operate saidl instrumentality, a second member having spaced abuttaliand pivotal relationship withsaid first: member, said second member selectable in accordance with 'the selective condition of said selector. means, meansfor biasing said second member toward said selector means, said biasing means efiectivesirnultaneously. through said abuttal and pivotal relationship to rotate said first memberintoioperativerelation with saidsactuator, and cammeans normally effective to preclude selective operation: of:-said second member; said cam meanseifective under certain conditions cooperation to rotate said second member aboutuits pivotal/support and. awayxfrom its abuttalrelationshipwit-h 'said first member: to withdraw said second member from selectiveoperation with. said. selectormeans pnior'to theadisengagement'of; said.first:member from: said actuator; whereby an overlap. between;- the. operation ofsaid selector means: and; the reoperation of saidz'inter-a ponents is facilitated.

5'; In combination, a. set of permutation: bars,,aslidably and pivotally. mounted first: member, an actuator;

saidfirstmember and said actuator-having engagingzfacilr ties, whereby. said actuator iszadaptedtotengage andzoper- 1 ate said first: member, a second member having amabuttal andipivotalcouple withsaid firstsmember, whereby under? certain conditions of operation said: first: and secondmembersmove as a. unit, and under other; conditions of:

operation said second member is. moved. independently,

around its pivotal connection with:said-.'first:member; and: away from itsabuttal supportto; facilitate a. resetting of; said permutation bars prior to the disengagementzofi'said; first member from. said actuator, whereby, an, overlap be; tween the setting of the permutation bars and thereopera tion of saidfirst member. is facilitated.

6.. A control unit including aset: of: permutation bars: having double edged code notch accommodations a plu rality of slidably and pivotally. mounted.:interponen ts;oppositely-disposed in accordance with; said double; edged accommodations, an actuator, said interppnentsand said actuatorhaving interlockingfacilities, whereby saidiact lator is adapted to engage and operate a selected; inter ponent, a plurality of members, eachoffsaid membcrsjuxtapositioned. to an interponent and; adapted; to have spaced abuttal. and. pivotal; supports thereon, said members indi-, vidually-selectable .inaccordance with the positionment of said: bars, spring elements for urging said membersttoward. said bars, said; spring elements; effectivesimultaneouslytoward said. abuttal and pivotal supports to ro tatethe associated interponentginto operative;relation,withz oppositely disposed in accordancewitlr said double edged accommodations, an actuator, said interponents and said, actuator having interlocking facilities, whereby said, actuator is-adapted to engage a selected interponent and operate an-associated instrumentality, a plurality of members,

each of said members juxtapositioned to an, inter-ponent and adapted to have spaced abuttal and; pivotal, supports thereon, said members individually selectable in accordance with the selective positionment of saidbars, spring elements for urging said members toward said bars, said spring elements effective simultaneously through, said abuttal and pivotal supports to rotatetheassociated interponent into operative relation with said actuator, and spreader'means for normally holding saiclmembers; away from said bars, said spreader means eflective duringthe operation ofsaid actuator for rotating said member about its pivotal support and away from said v abuttal, support toWithdraw said member from said bars prior to the disengagement of said interponent from said; actuator, whereby an overlap of operations in said control unit is facilitated. I

8.. In combination, permutation selector, means an instrumentality to be, operated, a slidably and. pivotally mounted interponcnt, an, actuator, said interponent, and:

1 said actuatorhaving interlocking. facilities, whereby said actuator is adapted to engage said inter-ponentto, operate saidinstrumentality; a selectable; member having an abuttal and; pivotal couple with said: interponent, whereby under certain conditionstof: operation;- said interponent and said. selectable. member; move as a-. unit, and under other conditions of operation said selectable member is moved independently about its pivotal connection with said interponent and away from its abuttal support to facilitate a resetting of said permutation selector means prior to the disengagement of said interponent from said actuator, whereby an overlap between the setting of said permutation selector means and the reoperation of said interponent is facilitated.

9. A control unit including a permutation selector means having double edged code notch accommodations, a plurality of slidably and pivotally mounted interponents opopsitely disposed in accordance with said double edged accommodations, an actuator, said interponents and said actuator having interlocking facilities, whereby said actuator is adapted to engage and operate said interponent, a plurality of selectable members, each of said members having an abuttal and pivotal couple with an associated interponent, whereby under certain conditions of operation an interponent and its companion selectable member move as a unit, and under other conditions of operation said selectable member is moved independently about its pivotal connection with said companion interponent and away from its abuttal support to facilitate a resetting of said selector means prior to the disengagement of said interponent from said actuator, whereby an overlap between the resetting of the selector means and the operation of another interponent is provided.

10. In combination, a selector means, an instrumentality to be operated, an interponent, an actuator, said interponent and said actuator having engaging facilities,

whereby said actuator is adapted to engage said inter-.

ponent to operate said instrumentality, a selectable member having an abuttal and pivotal couple with said interponent, whereby under certain conditions of operation said interponent and said selectable member move as a unit, and under other conditions of operation said selectable member is moved independently about its pivotal connection with said interponent and away from its abuttal support to facilitate a resetting of said selector means prior to the disengagement of saidinterponent from said actuator, whereby an overlap between the resetting of said selector means and the reoperation of said interponent is provided.

11. A control unit including a permutation selector means, a plurality of interponents mounted on a common pivot, an actuator, said interponents and said actuator having engaging facilities, whereby said actuator is adapted to engage and operate said interponent, a plurality of selectable members, each of said members having an abuttal and pivotal couple with an associated interponent, whereby under certain conditions of operation an interponent and its companion selectable member move as a unit about said common pivot, and under other conditions of operation said selectable member is moved independently about its pivotal connection with said companion interponent to facilitate a resetting of said selector means prior to the disengagement of said interponent from said actuator.

12. In combination, selector means, an instrumentality to be operated, an interponent, a reciprocating bar, said interponent and said bar having engaging facilities, whereby said bar is adapted to engage said interponent to operate said instrumentality, a selectable member having an abuttal and pivotal couple with said interponent, whereby under certain conditions of operation said interponent and said selectable member move as a unit, and under other conditions of operation said selectable member is moved independently about its pivotal connection with said interponent to facilitate a resetting of said selector means prior to the disengagement of said interponent from said bar.

13. In combination, selector means, an interponent, an actuator, said interponent and said actuator having engaging facilities, whereby said actuator is adapted to engage and operate said interponent, a selectable member dually supported by said interponent, biasing means effective under certain conditions of operation to efiectuate through said dual supports the simultaneous movement of said interponent and said selectable member, and means effective under other conditions of operation to move said selectable member independently about only one of said supports to facilitate a resetting of said selector means prior to the disengagement of said interponent from said actuator.

14. A control unit including a permutation selector means having double edged code notch accommodations, a plurality of interponents oppositely disposed in accordance with said double edged accommodations, an actuator, said interponents and said actuator having engaging facilities, whereby said actuator is adapted to engage and actuate said interponent, a corresponding plurality of selectable members, each of said members being dually supported by its companion interponent, spring means etfective under certain conditions of operation to efiectuate through said dual supports the simultaneous movement of an interponent and its companion selectable member, and means efiective under other operating conditions to move said selectable member independently about only one of said supports, whereby a resetting of said permutation selector means prior to the disengagement of said interponent is facilitated.

No references cited.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No 2,920,754 January l2 1960 Arthur F. Lindloerg It is hereb$ certified that error appears in theprinted specification of the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 7, line 10, for "cylindrically read cyclically Signed and sealed this 21st day of June 1960.

(SEAL) Attest:

KARL H. AXLINE ROBERT C. WATSON Attesting Officer Commissioner of Patents

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