US3086635A - Keylever storage mechanism - Google Patents

Description

April 23, 1963 E. PALMER KEYLEVER STORAGE MECHANISM 3 Sheets-Sheet 1 Filed July 14, 1961 R 0 I N E V N LEON E. PALMER A ril 23, 1963 L. E. PALMER KEYLEVER STORAGE MECHANISM Filed July 14, 1961 3 Sheets-Sheet 2 c2 2 a 2 s on 3 a a 2 ll]- 525:: d 225 a 1: I1 !i :25 52:5 2: M E v L2; 55%: V 35255 a. E 1:25;: III-l I I l l I llllllll -V/ :5/ :25 5:3 E 5 m & eaf 3 J a? E 5;: II...) o: 2 2 E rl A 33:52 iii--- an 3 $055: li|-| E I I I I lull-l.lyqfflwllll-llllclllllllul-lulllllllllqlnlllv ea a li r! 523E N N e: 1-- E5 as; 4 Es ozm x my em 3 $5 I 5 1 was 230 L2: :20

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April 23, 1963 E. PALMER KEYLEVER STORAGE MECHANISM 3 Sheets-Sheet 3 Filed July 14, 1961 FIG. 3

3,086,635- Patented Apr. 23, 1963 3,086,635 KEYLEVER STORAGE MECHANISM Leon E. Palmer, Lexington, Ky., assignor to International Business Machines Corporation, New York, N.Y., a corporation of New York Filed July 14, 1961, Ser. No. 124,210 2 Claims. ((31. 197-16) This invention relates to a typewriter and more particularly to a storage mechanism for storing and printing the character corresponding to a key which is depressed prior to the completion of a printing cycle of a previously depressed key.

In typewriters of the type disclosed in Patent No. 2,875,880, granted to L. E. Palmer on March 3, 1959, and Patent No. 2,919,002, granted to L. E. Palmer on December 29, 1959, both assigned to the present assignee, the selection and printing of characters require a cycle or train of events initiated by depression of a key corresponding to the character desired to be printed. This cycle of events occurs in a relatively short period of time after which another key may be depressed for printing of the next character. In machines of these types the cycle period is made so short that its printing speed is greater than the average typing speed of even the most proficient human typists.

In performing a usual typing operation, however, it is common for a typist to depress some few combinations of keys in very rapid succession, at times even faster than the printing speed of the typewriter. It is clear, therefore, that in such cases of unusually fast typing, characters may be omitted and printing errors can result. Alternatively, the typing speed of some typists would be adversely affected by the necessity of reducing the flurry typing rate so as to prevent errors.

It is accordingly a principal object of this invention to facilitate the storage of a depressed character key in cases wherein it is depressed before the completion of a previously initiated printing cycle.

The foregoing and other objects, features and advantages of the invent-ion will be apparent from the following more particular description of a preferred embodiment of the invention, as illustrated in the accompanying drawings.

FIGURE 1 is a simplified cross-sectional side view of a portion of a single printing element typewriter in which the present invention is incorporated,

FIGURE 2 is a timing chart designating the relative times at which different events may occur in the printing cycle of the machine shown in FIGURE 1, and

FIGURE 3 is a simplified eross-sectional side view of a portion of a type bar type of typewriter incorporating the present invention.

In machines of the type described in the above mentioned Patent No. 2,919,002, the depression of a character key is effective to actuate an interposer. A different interposter corresponds to and is actuated by each key and each interposer has a unique combination of projections for engaging and, in turn, actuating a unique combination of bails. The different combinations of actuated bails select the character of the single printing element to be printed and provide a predetermined orientation of the printing element.

In accordance with this invention, in a machine of the single printing element type described, each interposer which is actuated in response to a key depression is latched and with an interlock, prevents actuation of another interposer. The actuated interposer is retained in depressed position until it is unlatched simultaneous with the actuation of the combination of bails. The unlatching and unlocking are effected by the rotation of a filter shaft as one of the sequential occurrences in each printing cycle, after which follow a further succession of events in the cycle. Thus, it is clear that after one interposer is unlatched and unlocked, but before the end of the cycle for printing a character corresponding to this interposer, a second interposer may be interlocked and latched and be retained in latched position through the remainder of the period of the first cycle and the portion of the second cycle until it is unlatched. Similarly, any subsequent key may be depressed and corresponding interposers latched, at any time subsequent to the unlatching of a previously actuated and latched interposer, to store and subsequently print a character corresponding to the interposer.

In typewriters of the type disclosed in the above mentioned Patent No. 2,875,880, a keylever may similarly be depressed to actuate an interposer. In accordance with this invention, the interposer is pivotal to a latched and interlocked position and simultaneously a hook on the interposer is placed in position to be engaged by a flute of a rotating shaft. The interposer is actuable in a second direction by the fluted shaft and a cam ear on the interposer engages and actuates a type bar mechanism for printing a character. The key interlock prevents the actuation of a second interposer while another is latched and in combination with the latching mechanism the interposer is stored in its first actuated position in readiness to be actuated in the second direction of the engagement of the flute and hook above mentioned while the printing cycle of a previously depressed key is being completed.

Referring to the drawings for a detailed description of the invention, in FIGURE 1, 10 represents generally a single printing element typewriter in which the invention may typically be employed. The typewriter 10 has a conventional keyboard, not shown in its entirety, but having one keylever such as the one shown at 12, for each pair of characters on the printing head. In combination with a shift mechanism, each keylever depression facilitates the printing of two characters. A projection as shown at 14 facilitates manipulating the keylever. Each keylever is pivotal at one end about a fixed rod 15 and is guided and limited in its vertical movement as seen in this figure by a comb 16 secured to a frame member 17. Other key levers are disposed behind keylever 12 in this figure of drawing and have similar projecting actuating members as shown at 18, 19 and 20. A suitable key button such as shown at 22 is preferably applied to each projecting actuating member. As is conventional, during any typing operation, an operator depresses the respective keylevers which are spring biased upwardly in FIG- URE 1, each by a leaf spring similar to that shown at 24. These springs are secured to frame member 17 and project into engagement with the extremities of the keylevers. Twisting of the keylevers is prevented by the engagement of a projection 28 of the keylever with a frame member 29 against which the projection 28 abuts.

A pawl such as shown at 34 is mounted on each keylever and, with respect to FIGURE 1, is pivotal, from the position shown in a counterclockwise direction against the bias of a spring 36 connected between the pawl and a hook 38 on the keylever.

Each keylever and pawl is effective when depressed, to actuate a corresponding interposer, one of which is shown at 40. Each interposer has a projection 42 the remote end 44- of which is engageable with a lip 46 on pawl 34. Depression of the keylever, pawl and interposer causes the interposer to pivot in a clockwise direction about a rod 48 fixed relative to frame member 17 by a plate 50. A comb 49 guides movement of each interposer in its plane. Each interposer is slidable laterally as shown in FIGURE 1, by virtue of an elongated slot 52 accommodating rod 48 but is urged both upwardly and to the right in this figure, by a spring 54 secured at opposite ends to the interposer land a frame member 56, respectively. Thus, actuation of an interposer by a corresponding keylever is in opposition to the vertical component of force of spring 54.

An interlock is provided for preventing the simultaneous actuation of more than one interposer by a corresponding keylever and includes a plurality of balls, one of which is shown at 58, contained in a channel 61) extending the width of all of the inter-posers. The number of balls in the interlock is one greater than the number of interposers in the machine and the balls are restricted to a limited amount of movement in either direction along channel 61 Each interposer is provided with a projection 62 which is essentially removed from the channel of the balls in the upward position of the interposer but which is disposed between a pair of balls in the depressed position of the interposer. The aggregate spacing between adjacent pairs of balls in the interlock is greater than the width of projection 62 but less than twice this width whereby only one projection may be lowered at any one time and actuation of a second interposer is prevented.

In accordance with an important feature of this invention, provision is made for latching and retaining in actuated position, an interposer which has been actuated by a keylever. To achieve this result, a leaf spring latch member such as shown at 63 is provided for each interposer in the machine. Each latch member is secured at one end to a frame member 29 and extends downwardly in FIGURE 1. In the unactuated position of an interposer, the corresponding latch spring extends beyond the uppermost part of the end of the interposer. However, the resilience of the spring urges it toward member 29 and on actuation of the-interposer it moves away from and free of the spring and the spring moves toward and is stopped by member 29. The free end of the spring abuts the surface portion 64 of the interposer to prevent its return to initial position.

The actuation of any interposer is effective to rock a bail, which is shown at 65. This bail is supported in frame members not shown and engages and pivots a latch 66 about a rod 68 extending through the latch and a clutch latch link 70. A bail 69. is actuable together with an on-off switch and is selectively interposable inv the path of latch 66 as shown in dotted lines. The latch 66 is provided with a latch surface 72 engageable with a shoulder 7 4 on a member 76 which is rigidly fixed with respect to frame member 17, and the latch is biased to- -latching position by a spring 75 connected to latch 66 on the side of pivot rod 68 remote from surface 72 and to link 70. Clutch latch link 70 is spring biased to the left and somewhat downwardly as seen in FIGURE 1 by a spring 78 connected betweena member 79 secured to frame member 17 and to link 70. In response to the release of latch member 66, spring 78 pulls link 70 leftwardly in FIGURE 1. The movement of the link is guided by a rod '80, rigidly secured to member 76, and being accommodated by a slot 82 in the end of link 70.

A cycle clutch sleeve member '84 is provided with diametrically opposed,- radial shoulders 85 and 86 and, as indicated by the arrow thereon, is urged for counterclockwise rotation as viewed in FIGURE 1 by means not shown. A pulley 87- which is rotatable with sleeve member 84, is coupled to another pulley 88 by a belt 90 and a filter shaft member 92 is driven with pulley 88. Filter shaft member 92 is provided with a pair of similar, diametrically opposed lobes 94 and 96, each of which is engageable with a shoulder 98 at the end of interposer 40 in the actuated position of the interposer. The rotation of filter shaft 92 drives a lowered interposer leftwardly in FIGURE 1, in opposition to spring 54 by reason of the engagement between a lobe 94 or 96 with shoulder 98.

Each interposer is provided with a unique combination of projections such as the projections 99011 interposer 4! which are engageable with a corresponding combination of bails such as those shown at 160. As explained in the above mentioned lf'atent No. 2,919,002, rocking of different combinations of. bails 108 is effective through further mechanism, not shown herein, to appropriately orient a single head printing element for selection of a character to be printed. The actuated interposers, cycle clutch 84 and filter shaft 92 are selectively driven by the disengagement of a clutch latch 161 with either shoulder or 86 as the case may be. The latch 101 is secured to a pivotal arm 102 through a resilient intermediate material 104 which may be rubber and arm 102, in turn, is pivotal about a rod 106 which is rigidly supported by the frame of the machine. The end of link 76 is pivotal about a rod 103 extending through the link and an ear on the swingable end of arm 102 and thus, the movement of link 70, leftward in FIGURE 1, is effective to pivot arm 102 about rod 106 to unlatch sleeve 84. For subsequently returning the cycle clutch latch 101 into latching engagement with either shoulder 85 or 86, as the case may be, a latch restoring arm 108 is pivotal together with a follower arm 1519 about a rod 110 which is supported by the machine frame. The arms 169 and 110 are angularly adjustable relative to each other by a bolt 111 extending through suitable openings in portions of the arms and bolt 111 is tightened after adjustment to provide for unitary movement of these arms. The arm 109 is biased into engagement with shaft 92 by a spring 112 whereby during rotation of shaft 92, the lobes on this shaft rotate the arm against the tension of spring 112.. The arm 198 when so driven, forces arm 192 and latch 101 toward sleeve 84 to latch the same as one of the shoulders 85 or 86 rotates into engagement with the latch.

The manner in which the present invention is effective in storing a depressed key may be better understood by referring also to FIGURE 2 of the drawings wherein is shown the time relationship between the sequence of events in an operating cycle of a typical machine incorporating the present invention in a representative typing situation. In the graph of this figure, the abscissa represents elapsed time scaled in milliseconds and the ordinate of each individual line plot represents position of a certain component of the machine in FIGURE 1.

For printing a character in any typing operation, operator depresses a keylever such as 12. In FIGURE 2, this is represented by the line 116 wherein the move ment of the keylever takes place between times t0 and 11. This interval of time is shown as being approximately 6 milliseconds, although typically it may be considerably longer. As shown by line 118 the pawl 34 on the keylever engages and actuates the interposer 40 approximately one-half millisecond after time t0 and this in turn engages clutch trip bail 65 one-half second later, or in other words, approximately one millisecond after time t0 and actuates the bail as represented by line 120. As

explained hereinabove this actuation of the interposer causes it to be latched by members 63 and the interlock, including projection 62 and the balls 58, prevents actuation of another interposer. Actuation of bail 65 next unlatches latch 66 from shoulder 74 at time 132 and as rep resented by line 122 spring 78 acts from time t2 to time t3 to draw link 70 to the left in FIGURE 1. At time t3, cycle clutch sleeve 84 is free to turn and being un latched, the sleeve rotates as indicated by the arrow. Through the coupling between sleeve 84 and other elements including a cycle clutch spring, not shown, and by reason of the coupling to pulley 88 and shaft 92 through pulley 87 and belt 90, these members also begin to rotate at a time designated t4. At this time, a lobe on shaft 92 engages shoulder 98 on interposer 40 and actuates the interposer horizontally so as to simultaneously drive the bails 100 in the manner described to orient the printing head and select the character corresponding to the depressed key character, to unlatch the interposer from latch 63 and to withdraw projection 62 from the balls 58. This action is complete as shown on line 124 at time t5.

It is significant to note that at time 15, the interposer 4%) is driven horizontally free of the described interlock and that at any time subsequent to t5 and before the completion of the print cycle of the first actuated key, another key and interposer may be depressed, interlocked and latched into storage. This is represented at dotted line 126 indicating the vertical movement of a second interposer. It is clear that such actuation of another interposer is effective to actuate clutch trip bail 65 as represented by the dotted line 128 following the portion of line 120 which indicates a partial return of the bail.

From time t5 to time 16, interposer 40 returns to its initial position under the influence of spring 54 which imparts both vertical and horizontal restoring forces to the interposer. It is noted that this interposer restoration may occur prior to the restoration of the keylever. This is made possible by the fact that during the restoring motion of interposer 49, the projection 42 of the interposer engages the side of pawl 34 and causes it to rotate counterclockwise in FIGURE 1 sufficiently to accommodate the restoration of the interposer. As shown at time t7 in FIGURE 2, the keylever 12 is returned to its initial position under the influence of spring 24.

As filter shaft 92 continues to rotate during the printing cycle initiated at time t4, the lobe thereon which is diametrically opposite to that which actuated the interposer 40, engages arm 199 and forces it away from the shaft 22 so as to cause it to pivot about pin 110 and force arm 195 against member 102. As explained hereinabove, this projects clutch latch member 101 into the path of the shoulder 85 or 86 on sleeve 84 as it rotates. This movement is shown as occurring from times t8 and t9 on wave form 122 in FIGURE 2. However, engagement which would occur at time [11 in the absence of the depression of a second key lever completing the first cycle of the machine does not take place since latch 66 is unlatched and spring 78 acts from t9 to time 210 to raw link 70 and clutch latch members 1&1 away from sleeve 84 in the manner previously described. Accordingly, this initiates the second cycle of the machine.

The application of the present invention to a typewriter having a type bar for each pair of characters is shown at 139 in FIGURE 3 of the drawings. The typewriter 130 includes a conventional keyboard having a plurality of keylevers, one each for each pair of characters printable by the typewriter. Each of the keylevers is substantially the same as the others and each has cooperable therewith a different group of similar parts. Thus, for simplicity and brevity of description and explanation the detailed construction and action of only one keylever and associated parts will be set forth, it being understood that the same applies to the other similar groups of parts. Keylever 132 has a key button 134 mounted on a projection 136 of the keylever for manually manipulating it. Each keylever is pivotal about a rod 138 and suitable provision is made for guiding and limiting the movement of each keylever and for biasing it to its restored or initial position. An interposer such as that shown at 149 is provided for each keylever and the manipulation of each keylever forces the same toward the interposer so that a projection 142 on the keylever engages an opposing projection 144 on the interposer.

Each interposer is pivotally mounted on a rod 14-6 and a limited lateral movement of the interposer with respect to the rod is facilitated by a slot 148 in which the rod 146 is fitted. Thus, the depression of a keylever forces a clockwise rotation of the corresponding interposer. Each interposer is biased to the right and in a counterclockwise angular direction as viewed in FIGURE 3 of the drawings by the tension of a spring such as 150 6 connected between the end of an interposer and a hook 152. on a projection of a corresponding keylever. A stop 154- restricts the counterclockwise movement of the interposer.

In accordance with this invention, a ball interlock is provided for preventing the simultaneous actuation of more than one interposer. The interlock includes a plurality of balls one of which is shown at 156 contained in an elongated channel the end of which is shown at 158. The channel is closed at each end and the aggregate spacing between balls is greater than the width of any single interposer but less than twice this width. The interposers are of uniform width and the number of balls is one greater than the number of interposers and thus, the ball interlock acts to accommodate a portion of an actuated interposer between a pair of balls while preventing a similar interposition of another interposer.

In accordance with a feature of this invention, provision is made for latching an interposer in its actuated position. For achieving this result, a resilient spring latch member as shown at 160 is provided for each interposer and is fixedly mounted at one end to a member 162 which is rigid with the machine frame. A suitable screw 164 is shown for this purpose. In the initial position of the interposer as shown in FIGURE 3, the spring 160 extends beyond the nearest portion of the interposer and is in abutment with the end of the interposer. In this position the spring is distorted from its free position and it bears against the end of the interposer. In the actuated position of the interposer, however, the interposer is moved away from the spring 160 and free of it whereby the spring moves to a position in which its end abuts the nearest surface portion of the interposer. As may be understood, in this condition, the interposer is held down or latched in actuated position.

A bail member 166 which is pivotal about a pivot rod 168, extends the width of the machine and is disposed between the interposers and a trip latch 170. The trip latch is also pivotal about rod 168 and thus, the actuation of any interposer is effective to rock the trip latch about its pivot.

In the machine 130, a shaft 172 extends the Width of the machine and has mounted thereon a member 174 having opposed flutes 176 and 178 with respective radial, diametrically opposed, flat surfaces. A cam member 180 is mounted on the shaft for rotation with it. A stop 182 is selectively positionable to engage the cam 18% to prevent the counterclockwise rotation thereof. Another cam member 184 is coupled to a power means through a spring clutch, not shown, and is selectively releasable for effecting coupling between the power means and shaft 172 for rotation of this shaft and parts rotatable therewith. The stop 182 in blocking the rotation of cam 18% releases the spring clutch and accordingly, interrupts the power drive to shaft 172.

As noted hereinabove, the key lever actuation of any interposer causes it to pivot about rod 146. In this actuzated position of the interposer, a lip 186 near one end thereof is disposed in the rotary path of a flat surface of one of the flutes 176 or 178. Also, a projection 188 of inter-poser 140 is positioned with one side adjacent to a shoulder 191} of a cam 192. In the actuated position of an interposer, bail 166 is rocked to pivot trip latch 170 about rod 168 to release cam 184. The release of this cam couples the power means to shaft 172 and thus, one of the flutes 176 or 178, as the case may be, engages lip 186 on interposer 140 and draws the interposer in the direction of the arrow shown on interposer 140 in FIG- URE 3 of the drawings. As a consequence, projection 188 engages shoulder and pivots cam 192 .to a small extent about a rod 194 and in the direction of the arrow on the cam. The rod 194 serves to join cam 192 with a cam lever 198 and these members are individually pivotal about this rod. As the cam pivots this small extent, a serrated edge 196 of the cam engages a power roll 200 which is continuously driven in the direction of the arrow adjacent thereto in FIGURE 3 and, as is well known, the power roll quickly pivots the cam to the full extent of engagement between the serrations 196 and the power roll. During this engagement of these members, the cam member is driven away from the power roll because of the increasing radius of curvature along the serrated portion and cam lever 198, through rod 194, is also driven away from the power roll. However, cam lever 198 is pivotal about a fixed rod 202 whereby the end 204 of cam lever 198 swings with increased amplitude. As is known, suitable means may be provided for coupling a difierent type bar to each cam lever at its end corresponding to 204.

The action of the power roll in driving cam 192 is to cause it to be thrust clear of the power roll. For facilitating restoration of these members, after this action, a spring 206 is connected between the cam lever 198 and a fixed frame member and a spring 208 is connected between cam 192 and cam lever 198 to restore these members to their initial relative positions.

In the operation of the typewriter 130, it is clear that the interlock 156-158 and spring latch 160 are efiective to store a single depressed key and actuated interposer for the period of an operating cycle of a previously depressed key, remaining after a second key is depressed in a manner similar to that described with respect to typewriter 10.

From the foregoing description the manner in which this invention provides an eifective means for storing a vertically actuated intenposer until a previously initiated printing cycle of the machine is completed and then eifecting printing of a character corresponding to the stored interposer in a single printing element machine is made clear.

While the invention has been particularly shown and described with reference to a preferred embodiment thereof, it will be understood by those skilled in the art that the foregoing and other changes in form and details may be made therein Without departing from the spirit and scope of the invention.

I claim:

1. An apparatus comprising a plurality of interposers each being individually actuable in a first direction and means for preventing the simultaneous actuation of more than one interposer in said first direction, interposer latch means for latching an interposer actuated in said first direction, a cyclically operable shaft having a cam lobe thereon engageable with the endof an actuated interposer for actuating the same in a second direction to unlatch the interposer, a cycle clutch coupled between said shaft and a power drive means, clutch latch for selectively latching said cycle clutch, a link member coupled to said clutch latch and a link latch effective to retain said link member and clutch latch in position to latch said cycle clutch, means biasing said link to unlatching position, said link latch being responsive to actuation of an interposer to unlatch said link and withdraw said clutch latch from engagement with said cycle clutch, means responsive to the actuation of an interposer in said second direction to restore the same to initial position to facilitate actuation and latching of another interposer and means responsive to the rotation of said shaft to act against said bias means and force said clutch latch into latching engagement with said cycle clutch.

2. In an ofiice machine having :a single element printing head orientable to a plurality of positions and a plurality of key actuable interposers each having a portion with a predetermined width and being engageable with a unique combination of members for selecting a position of said head, comprising means for individually actuating each of said interposers in a first direction and means for preventing the simultaneous actuation of more than one interposer in said first direction, means for latching each interposer displaced a predetermined extent in said first direction, a rotatable shaft having a first cam lobe thereon and being effective in response to rotation of said shaft to engage a latched interposer to actuate and displace said interposer in a second direction to unlatch the same from said latch means, means for selectively rotating said shaft including a cycle clutch coupled between said shaft and a power drive means, a link latch for selectively latching said cycle clutch, means establishing coupling between each of said interposers and said link latch for unlatchingsaid cycle clutch in response to the actuation of each interposer in said first direction, means including a second lobe on said shaft eifective in response to rotation of said shaft for moving said link latch into position for latching said cycle clutch and means for restoring an actuated interposer to unactuated position prior to the latching of said cycle clutch whereby a second interposer may be actuated in said first direction and latched in actuated position prior to the latching of said cycle clutch.

References Cited in the file of this patent UNITED STATES PATENTS 2,861,668 Beccio Nov. 25, 1958 2,870,896 Riffel Jan. 27, 1959 2,978,086 Hickerson Apr. 4, 196 1

Claims (1)

1. 2. IN AN OFFICE MACHINE HAVING A SINGLE ELEMENT PRINTING HEAD ORIENTABLE TO A PLURALITY OF POSITIONS AND A PLURALITY OF KEY ACTUABLE INTERPOSERS EACH HAVING A PORTION WITH A PREDETERMINED WIDTH AND BEING ENGAGEABLE WITH A UNIQUE COMBINATION OF MEMBERS FOR SELECTING A POSITION OF SAID HEAD, COMPRISING MEANS FOR INDIVIDUALLY ACTUATING EACH OF SAID INTERPOSERS IN A FIRST DIRECTION AND MEANS FOR PREVENTING THE SIMULTANEOUS ACTUATION OF MORE THAN ONE INTERPOSER IN SAID FIRST DIRECTION, MEANS FOR LATCHING EACH INTERPOSER DISPLACED A PREDETERMINED EXTENT IN SAID FIRST DIRECTION, A ROTATABLE SHAFT HAVING A FIRST CAM LOBE THEREON AND BEING EFFECTIVE IN RESPONSE TO ROTATION OF SAID SHAFT TO ENGAGE A LATCHED INTERPOSER TO ACTUATE AND DISPLACE SAID INTERPOSER IN A SECOND DIRECTION TO UNLATCH THE SAME FROM SAID LATCH MEANS, MEANS FOR SELECTIVELY ROTATING SAID SHAFT INCLUDING A CYCLE CLUTCH COUPLED BETWEEN SAID SHAFT AND A POWER DRIVE MEANS, A LINK LATCH FOR SELECTIVELY LATCHING SAID CYCLE CLUTCH, MEANS ESTABLISHING COUPLING BETWEEN EACH OF SAID INTERPOSERS AND SAID LINK LATCH FOR

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