US2105173A - Start-stop regenerative repeater - Google Patents

Description

Jan. 11, 1938. w. J.ZENNER ET AL 2,105,173

START-STOP REGENERATIVE REPEATER I Original Filed May 23. 1956 T ns. 1-

4o mug INVENTOR WALTER J. ZENNER BSYTEPHEN JANISZEWSK' 55'al1- op-eratingparts of the repeater are mounted.

Patented an. 11, 1938 PATENT o ioE stranr-s'ror REGENERATIVE REPEATER.

Walter Zenner, Des Plaincs, and ,Stephen Janiszewski, Chicago, 111., assignors to Teletype Corporation, Chicago, 111., a corporation of Delaware Application May'23, 1936, Serial'No. 81,410 Renewed August 25, 1937 9 Claims. (Cl. 178-70) This invention pertains to telegraph systems of the start-stop type in which code signals are repeated from line section to line section, and more particularly, to regenerative repeater mechanisms for start-stop telegraph systems.

The object of the present invention is to'provide a start-stop regenerative repeater of simple designan'd capable of easy and accurate adjustment into an operating condition both during and after assembly.

The above and other objects are attained by providing separate and independent adjusting means for the several cam followers for position ing them adjustably in. the planes of their respective controlling cams, relatively adjustable arms upon a controlling leveror jockey which operates to receive cam control from av cam surface at the extremity of one arm and to deliver cam'control from a cam surface at the extrem- 'tf ity of another arm, an adjustable stop member electromagnetic system of the repeater mecha nism and to readjust it While in operation, and other details of convenience in the construction and operation of the device.

The present invention 7 provides a modified form of a structure disclosed in copending application Serial No. 712,461, filedFebruary 23,

1934 by Walter J. Zenner for Start-stop regenerative'repeater. g g

A better understanding'of the invention may be had from the following description, taken in Fig. 4 is a sectionalview taken on line 44 in Fig. 1.

Referring to Figs. 1 and 2, a frame structure comprises a base platelfl and a base casting Ii united by screws l2. Upon the basic structure An operating cam shaft l3 has integral sec tions' l4 and I5 of larger diameter journaled in the base casting l l and has other sections l6 and I1 upon which parts are assembled to turn with the shaft, some in fixed relation and others in adjustable relation. I-Iub I8 is fixed upon shaft section l6 by a set screw and bears a driven repeater gear l9 fixed upon hub l8 by a lock nut.

A cam sleeve has assembled upon it a stop arm 2i, a flutter cam 22, an'off-normal cam The outerend ofthe cam sleeve 28 has an integral fiange as shown, and the tubular end of cam sleeve 20 is threaded with right-hand thread which is engaged by the lock nut to fix the stop arm and all cams upon the cam sleeve, after which threaded flange 25 is assembled upon the end of the cam sleeve. A slightly larger sec-' tion of shaft section I! is threaded to carry an adjustable nut 2'l'which engages one end of a shaft-encircling spiral spring 28 whose other end engages a loose flange 29 splined to revolve with the cam shaft Is. At the end of shaft section I! an internal lefthand thread is tapped into which a threaded stud of flange 3ll is screwed tightly, anannulus 3| of friction material having been positioned between the flanges 26, 3| and a similar annulus between the flanges 25, 29. Adjustable 'nutil now is turned to produce a desired tension in spring 28, the assembled cam shaft i3 is placed in the journal bore of the base casting II, lock nut 32. and cut nut 33 are installed upon the threaded end of base casting ll and hub IS with gear I9 is fixed upon the shaft section 16.

23, a timing cam '24, a lock'nut and a threaded flangedisc 25, all with spacing rings'interposed.

Cam shaft, 13 is designed to rotate continuousshoulder screw 50 in fixed frame plate 5| and having indicator arm 52 with lock nut 53 cooperating with a calibrated scale on plate 5|.

In operation, with magnets 54 energized'and with armature 4i! in'its operated or attracted position, lever 36 is rocked by its spring to obtion by means of pivoted plate 4!, pivoted upon I struct the gate latch 34 and to cause pin 38 to protrude, shaft l3 rotates continuously and through friction members 3| urges cam sleeve 20 to press stop arm 2| against the obstructing gate latch 34 which in turn is obstructed by lever 36. Deenergization of magnets 54 in response to an electrical signal releases armature 45 which, propelled by its retractile spring 55,

Fig. 1, moves striker 39 to push the pin 38 which V operates bell crank lever 31 and rocking lever 36 to release gate latch 34, thus releasing stop arm 2| and permitting the cam sleeve 20 to turn by power transmitted through the friction members 3|. Timing cam 24 strikes its follower 51 at the instant of beginning of each repeated signal impulse, flutter cam 22 strikes its follower 58 and thereby propels armature 49 toward magnets 54 just prior to each operation of follower 51 after its first operation in each code cycle, and off-normal cam 23, through lever 69, permits its contact springs 59 to close during a period of substantially the full revolution of the cam sleeve 29, reopening its springs 59 just before the cam sleeve is stopped by reengagement with the gate latch.

An armature carrier 6|, of which cam follower arm 58 is an integral part, is pivotally supported upon the extension sections of two shouldered screws 62, Fig. 3, and is restrained against axial translation by the shoulders thereof. Screws 62 are threaded into tapped holes in casting 63 in the axis of the boss 64 and pivotally support also upon their extended sections the contact lever 65 which is restrained against axial translation by abutment with the ends of the screws 62. Armature carrier 6| and contact arm 65 thus are pivoted coaxially for independent movement and are articulated through two substantially straight springs 66 whose proximal ends are attached to armature carrier 6| by means of clamp 61 and whose distal ends engage the two sides respectively of contact arm 65. By provision of long and substantially straight springs instead of short coiled springs, it is possible to apply spring propelling force at a contact point near the points of application of mechanical restraint, at the same time preserving the feature of minimum weight for all oscillatory parts. Contact arm 65 bears a contact support member 10 clamped between plates of insulating material by screws H to which are attached two pairs of flexible contacts l2 and a flexible conductor 13, all electrically united but insulated from the arm 65. In one position of contact arm 65, the flexible contact springs 12 engage both contact screws '54 and in the alternative position of arm 65, the springs 12 engage both contact screws 75.

In operation, when contact arm 65 is in spacing position as shown and when armature carrier 6| moves to marking position by power from flutter cam 22 and when armature 40 then is held in marking position by energized condition of magnets 54, the lower one of springs 66 will urge contact lever 65 upward and cam 24 will strike its follower 51 to cause a cam surface 16 on arm 1! to release arm 65, thus permitting arm 65 to follow the armature carrier 6| into marking position and to shift the flexible contacts 12 out of engagement from contact screws 14 and into engagement with contact screws 15. Alternative or reverse operation of the same parts is obvious.

A novel design of contact post for carrying two contact screws is provided, comprising an integral metal base part 19, Fig. 3, having two clamp jaws and a single clamp screw 8| for the two contact screws, and having an elastic neck 82 for at least one of. the clamp jaws with a hinge axis or axis of elastic yield 83 so related to the positions of the two contact screws that approximately equal clamp pressure is applied ultimately by the one clamp screw to the two contact SCISWS.

Tight and loose jockeys are provided for pivoted arm 65 which carries repeating contacts 12 and is propelled in oscillating manner at predetermined moments by power received from armature 4|] through one or the other of the two straight springs 66. A loose jockey 84 pivotally supported upon the base plate Hi and lightly tensioned by spring 85 engages the pivoted arm 65 with cam faces near the points of engagement of the springs 66; either spring, when tensioned to move the pivoted arm 65, being sufficiently strong to overcome the loose jockey, and the loose jockey being at all times tensioned sufficiently to prevent vibration of the pivoted arm from bounce or inherent periodicity or other minor cause. A tight jockey 86 strongly spring tensioned by its spring 8'! has a cam arm 11 which engages the pivoted arm 65 upon radial or slightly cammed faces near the points of engagement of the springs 66 and is tensioned suffrciently to hold the pivoted arm 65 against all spring urges, the tight jockey being mechanically operated by timing cam 24 to abandon the pivoted arm 65 to control by its propelling springs at predetermined moments. It is advantageous to have all springs and jockeys engage the pivoted arm at points closely grouped. When the two straight springs 66 are fabricated from round wire, as shown, union of the two springs at their proximal ends prevents axial rotation of either one of the springs.

Tight jockey timing adjustment is effected by provision of a mounting arm 89 adjustable in angular position around a fixed pivot post 90 to support a movable pivot post 9| upon which the tight jockey rocks, the arrangement of parts being such that, by angular movement of the mounting arm, a resultant movement is effected of cam follower 51 integral with the tight jockey along the periphery of. its rotatable controlling cam 24. A principal orientation mechanism in the repeater effects orientation of all cam followers with reference to the starting position of the several cams as determined by the stop arm 2| and gate latch 34, and in addition, as a further device for orientation adjustment, the movable pivot post 9| for the tight jockey effects an adjustment of the jockey cam follower with reference to the starting position of its cam and without modifying coexistent adjustments between other cam followers and the starting positions of their cams, respectively.

The tight jockey 86 comprises two arms, one of which 51 is a cam follower for receiving controlling motion from a motor driven cam 24, and the other of which 17 has the nature of a cam with cam faces 16 on an extension whose follower is the pivoted contact arm 65. When a desirable adjustment of the cam follower arm 51 of the jockey has been attained by means of eccentric shoulder screw 92, angularly adjustable mounting arm 89, and the movable pivot post 9| supported thereby, it may be desirable to change the position of the cam arm 11 of the jockey relative to its follower, the pivoted contact arm. There are provided for this purpose two separate arms 51 and H for the tight jockey, pivoted upon the pivot post 9| coaxlally and independently, and

articulated by a screw threaded into one of the arms and passing through a slot'in'the other of the arms. The cam arm I! of the jockey may be adjusted to itsv desired position without changing 1. the position of the cam follower arm 51', the arms i of the repeating mechanisms hereinillustrated are used in a single repeating system which transmits in two ways alternatively upon a single channel of communication, operating the repeating mechanisms alternatively in so doing, the cam controlled contacts 59 in an operating repeating device disable a companion repeating device to prevent reflection signals. It is required that the cam controlled contact springs be in open condition when the cam 23 is at rest, regardless of the orientation position of adjustment of the cam 23. Accordingly, there has been provided for the springs a support or carrier 95 rotatable coaxially with the cam sleeve 20 and rotatable under control of the principal orientation mechanism to maintain unchanged the relation between and among the contact springs 59,'their cam 23 and the cam follower 60 associating the springs and the cam. An annular rib is provided by base casting I I which projects above the base 7 plate IIlgof the repeater mechanism, surrounding the cam shaft and surrounded by an inner annular edge of a ring of the carrier 95, a portion of the ring of carrier 95 being omitted to permit the yoke-shaped remainder to pass the cam sleeve 20 and to take its position upon the annular rib after assembly of the cam shaft I3 and the base structure I0, II. A clamp member 96 of spring nature, shaped to resemble a part of a ring, holds the carrier 95'rotatable around the cam shaft I3 under friction between the base plate and the clamping member, a similarmember Qlof spring nature being positioned-between carrier 95 and base H] in the manner of a shim. Control of the spring carrying" member 95 by the principal orientation mechanism is attained by providing Y the face of the base plate I to the plane of the cam arm 51 of the tight jockey B3, and provision is made by cup nut 33 and its lock nut 32 to adjust the controlling cam 24 into the plane of its follower 51'. The cam shaft I3 has fixed upon it a gear hub I8 having a crown face near and opposing a crown face of a shoulder l upon the shaft, and between these two crown faces is confined a web of cup nut 33 which is-threaded to the frame casting II of the repeater base structure; An adjusted position of the cupnut 33 the position of the plane of the cam 24 with relation to its follower, the tight jockey arm 51; The

cup nut 33 may be turned until a desired relation of cam and follower is attained and the lock nut then may be tightened to retain the adjustment. Subsequently to adjustment of the cup nut33 and cam 24, the follower 60 of off-normal switch 59 may be adjusted into the plane of its cam 23 by changing the thickness or by changing the number of friction rings 91 between the off-normal switch carrier 95 and the face 'of the base plate I0 according to well-known practice with shims.

Also subsequently to adjustment of the 'cup nutshouldered pivotal screws 52, Fig. 3, retiring one screw and advancing the other to position the armature carrier 6| at the distance desired from therefore, determines an adjustedaxial position of the cam shaft I3, and such adjustment varies the face of the base plate I0 to bring its cam follower 53 into the plane of its cam 22.

An abutment for the arm TI of the jockey 86 to determine dimension of engaging cam surfaces l5 between the arm H and the pivoted contact arm 65 is provided in a radial yoke member 99 attached adjustably to the fixed stud 90 and having its distal end formed into a yoke which spans the arm ll of the jockey at a location near the cam faces iii of the jockey arm. The radial yoke member, surrounds the fixed post 90 by a closely fitted hole having a radial slot, and a bolt and nut I00 with lock washer is provided to draw together the sides of the radial slot, thereby clamping the member 99 firmly upon the fixed post 90.

A plurality of repeater mechanisms as illustrated herein are assembled upon a frame or rack IIII which is equipped with a motor (not shown) motor driven shafting I02, and motor driven gear I03, a motor driven gear being provided at the location of each and every proposed repeater. Screw tapped mounting holes are provided in the assembly rack located at predetermined distances; from each gear I03 and these distances are comparable. torelated distances in each repeater. Each repeater also contains a gear I9 designed to mesh with one of the gears I03 on the assembly rack I0 I. When a repeater is mounted by screws engaging the base plate of the repeater and threaded into the noted tapped holes in the assembly rack, the gear IQ of the repeaterwillmesh the gear I03 of the rack and provision is made for minor adjustment to produce a satisfactory depth of meshing between the teethof the. two gears. Near the lower edge of the repeater base plate, two bosses I04 are provided, shaped to present substantially spherical faces I05 against the rack I0! which is suitably countersunk. Each boss I04 is drilled to provide ample clearance for a mounting screw I06, the function of positioning the repeater upon the rack being effected by en- 3 gagement of two sphericalsurfaces, not by engagementof any boss I04 with the body of a, mounting screw. Near the upper edge ofthe repeater base plate I0, a tapped hole I0! is provided in a location approximately coaxial with e a tapped hole I08 of larger diameter in the rack IOI.

A tubular adjusting member I09 is externally threaded to cooperate with the tapped hole I08 of the rack and has an internal diameter offering ample clearance-for a screw'l I0 engaging.

wrench to turn the tubular screw member I09. Adjustment by moving the repeater gear wheel in relation to the rack gear wheel is effected by adjusting the three mounting screws closely, but not tightly, then turning the tubular screw member I 09 to push the upper edge of the repeater base plate In from the rack IEH, thus swinging the repeater base plate upon its bosses H34 as upon a pair of hinges, and thus rotating the entire repeater mechanism to cause the repeater gear Hi to approach more closely the rack gear IE3, or conversely. When desired adjustment has been attained, the three mounting screws are tightened, and their split ring lock washers assist them in retaining the gears in adjusted position.

Subsequently to connection of the winding of the electromagnet into the circuit of a telegraph line, adjustment of the interstice of the core and armature may be required to adapt the magnetic system to the electrical constants of the specific line into which it has been connected. Accordingly, there is provided means for moving the magnets 54, comprising pivotal means for governing the path of movement of the magnets, and micrometric means for producing movement of the magnets and for controlling the extent of movement and for preserving a condition of adjustment. The magnet cores are mounted upon a casting 63 having a flat face engaging the face of the base plate !0 of the repeater and having the cylindrical boss 64 projecting from the flat face and entering a circular hole in the base plate whose edges are engaged closely, thus forming a journaled articulation. A threaded member or adjusting screw I I2 is threaded into a tapped hole in the casting 63 and has a pair of crown faces H3 which engage closely the sides of a pin H4 fixed in the base plate ill. By virtue of engagement of its crown faces with the fixed pin, the

4m adjusting screw H2 does not move axially when turned, resulting, therefore, in a movement of the casting 63 and of the magnet cores, thus varying the interstice of cores and armature 40. Screws H5 threaded into the base plate pass 43;, through slots in the casting 65 and clamp the casting firmly to the base plate when a desired condition of adjustment has been attained.

The present invention, having been described above in connection with illustration of a specific embodiment thereof, now will be considered more generally and from a contemplation of its broader scope, and will be definitely pointed out in the claims without limitation to the specific illustration utilized herein for teaching the invention and its application to the prior art.

What is claimed is:

1. In a start-stop telegraph repeater, a structural frame, a rotary shaft journaled in said frame, a plurality of coaxial rotary cams occupying relatively fixed separate planes upon said shaft, cam followers for said cams severally and separately mounted on said frame, a pair of oppositely faced annular shoulders upon said shaft, and a screw threaded member adjustably engaged with said frame and engaging said two annular relatively to all of said cam followers to vary the relation of the planes occupied by said cams with the planes occupied by said cam followers, and means comprising a pair of shouldered screws whose threads engage said frame and whose shoulders and extension sections engage one of said cam followers for moving one of said cam followers to vary the relation of the planes occupied by said one of the cam followers and its associated cam.

3. In a start-stop telegraph repeater, a structural frame, a cam shaft journaled in said frame, a cam assembly member comprising a plurality of coaxial rotary cams in fixed axial and angular relations carried by said shaft, cam followers for said cams, means carried by said frame and engaging said cam assembly and adjustable to vary the angular relations between a plurality of said cams and their associated cam followers, and further means carried by said frame and engaging one of said cam followers and adjustable to vary the angular relation between a cam and its associated cam follower.

4. In a start-stop telegraph repeater, a plurality of rotary cams, cam followers for each of said cams, means for adjusting simultaneously the orientation of a plurality of said cams, and further means for adjusting the orientation of one of said plurality of cams.

5. In a start-stop telegraph repeater, a signal receiving armature, a rotary cam, a cam follower engaging said cam and controlling said armature, a retransmitting contact member, a further rotary cam, a further cam follower engaging said further cam and controlling said retransmitting contact member, said cam and said further cam fixed together, joint orientation means for said cams, and means comprising an adjustably positioned pivot for one of said cam followers for varying the relation of operating times of said signal receiving armature and of said retransmitting contact member.

6. In a regenerative start-stop telegraph repeater, a retransmission cam, a pivoted follower arm for said retransmission cam, a retransmitting contact member, a pivoted controller arm for said retransmitting contact member, said follower arm and said controller arm pivoted coaxially upon a common pivot adjustable with respect to said cam, means for uniting said follower arm and said controller arm at a desired angular relation, and a double stop member for said controller arm having front and back stops for said controller arm in fixed relation to each other and jointly adjustable to a desired position, said stops engaging said controller arm at mechanical contact points adjacent the point of engagement of said controller arm and said retransmitting contact member.

7. In a regenerative start-stop repeater, a retransmitting contact member, a signal responsive armature, said member and saidarmature pivoted coaxially, a plurality of straight springs engaging said member and said armature controlled by said armature and tending to urge said member, a jockey engaging said member and spring tensioned to yield to movement of said member when urged by said straight springs, and a holding jockey having engagement with said member, the contact points of mechanical engagement of said member with said straight springs, said jockey, and said holding jockey being closely grouped upon said member.

8. In a regenerative start-stop telegraph repeater, a retransmitting contact arm, means for operating said arm in start-stop manner, a pair of retransmitting contact members attached to said arm, said contact members electrically connected together, a pair of adjustable contact screws having contact points engageable concurrently by said contact members, and'a supporting clamping bracket for said contact screws comprising a unitary electrically conductive member having a body portion and two clamp jaws tapped for two contact screws, said jaws connected to said body portion by hinge portions and relatively movable with respect to each other upon a hinge line parallel to a plane through axes of said two contact screws whereby by relative driven gear is carried, a rack frame upon which said power shaft and power gear are carried,

' hinge members comprising bosses with spherical surfaces. and loosely engaging screws engaging said repeater frame with said rack frame for limited relative rotation to produce a desired adjustment of intermeshing of teeth between said gears, rotation control means comprising a threaded tubular member engaging a tapped hole in said rack frame and abutting said repeater frame, a screw engaging a'tapped hole in said repeater frame and passing through said threaded tubular member to clamp said repeater frame to said threaded tubular member and to clamp said tubular member against rotation in said rack frame, and means for turning said threaded tubular member, said means for turning and said gears being upon one and the same side of said rack frame.

WALTER J. ZENNER. STEPHEN JANISZEWSKI.

Images