US1635486A

US1635486A - Printing or selecting telegraphs

Info

Publication number: US1635486A
Application number: US346948A
Authority: US
Inventors: Charles L Krum; Howard L Krum
Original assignee: MORKRUM KLEINSCHMIDT CORP
Current assignee: MORKRUM KLEINSCHMIDT CORP; MORKRUM-KLEINSCHMIDT Corp
Priority date: 1919-12-23
Filing date: 1919-12-23
Publication date: 1927-07-12
Anticipated expiration: 1944-07-12
Also published as: FR535035A; GB187247A; US1635129A; US1676448A; US1676447A

Description

Jul '12 1927.

y I c. L. KRUM ET AL PRINTING OR SELECTING TELEGRAPHS Original Filed Dec. 23. 19.19

9 Sheets-Sheet 1 :iiiiil I W in July 12, 1927.

'c. KRUM ET AL PRINTING OR SELECTING TELEGRAPHS 9 Sheets-Sheet 2 low Original Filed Dec. 23, 1919 3&1 12 1927.

y c. L. KRUM ET AL PRINTING OR SELECTING TELEGRAPH-'5 Original Filed Dec. 23. 1919 Sheets-sheaf. 4

Jul 12,1927. 4 1,635,486

v c. L. KRUM ET AL PRINTING OR SELECTING TELEGRAPHS Original Filed Dec. 23, 1919 9 sh t -Sheet 5 '80 IIIIIHIIII c. L. KRUM ET AL PRINTING 0R SELECTING TELEGRAPHS Original Filed Dem- 1919 9 Sheets-Sheet 7 July 12, 1927. ,486

C. L. KRUM ET AL PRINTING OR. SELECTING TELEGRAPHS Original Filed Dec 25. 1919 9 s t -shut 8 July 12, 1927.

'c. L. KRUM ET AL PRINTING OR SELECTING TELEGRAPHS Original Filed Dec. 2 9 9 Sheets-Sheet 9 inmat s July 12,1927.

,UNITED STATES- PATENT orrlca CHARLES L. K RUM AND HOWARD L. KBUM, OF CHICAGO, ILLTNOIS, ASSIGNORB, BY M15531! ASSIGNMENTS, TO MOBKBUH-KLEINSCHMIDT CORPORATION, 01 CHICAGO,

ILnINois, A CORPORATION or DELAWARE.

PRINTING on SELECTING 'rELnenArns.

Application filed December 23, 1919, Serial No. 346,848. Renewed October 30, 1826.

To this end the invention provides improved transmitting and recelving apparatus having sets of permutation members or selectors corresponding in number to'the selecting units of a definite interval code, and in which electric contacts and magnets are reduced to a minimum the operations, for

the most part, being effected mechanically rather than electrically. A further object of the invention is to provide improved apparatus in which the receiver is kept in proper timed relation with the signals by initiating the operation of the rotary receiver shaft in response to a starting unit or interval which precedes the selecting units or intervals of each signal.

The invention consists in the features of improvement hereinafter set forth, illustrated in preferred form and arrangement in the accompanying drawings, and more particularly pointed out in the appended claims.

In the drawings- Figure 1 is a plan view with the brackets which carry the receiver or printer shown in horizontal section;

- Fig. 2 is a detail section on the line 22 of Fig. 1;

Fig. 3 is a vertical section on line 3-3 of Fig. 1 with the motor broken away and illustrating the transmitter;

Fig. 4 is a detail section on the lines 4-4 of Figs. 1 and 6;

Fig. 5 is a section on the lines 5-5 of Figs. 1 and 6;

Figs. 6 and 7 are detailsections on the lines'66 and 7-7, respectivel of Fig.1; Fig. 8 is a rear elevation of t e apparatus with the base broken away;

Fig. 9 is a front elevation of the receiver or printer of the apparatus;

Fig. 10 is a vertical section on the-line 1010 of Figs. 11 and 12 with the parts shown shifted from normal or zero posi tion;

Fig. 11 is a side elevation of the receiver or printer with the controlling clutch shown in vertical section;

' Fig. 12 is a vertical front to rear section of the receiver with parts in the position shown in Fig. 10;

Fig. 13 is a vertical section on the line 1313 of Fig. 11; i

Fig. 14 is a detail section on the line 14- -14 of Fig. 12;

Fig. 15 is a detail elevation of the trip mechanism for the receiver clutch with parts shown in shifted position;

Fig. 16 is a development of the cam which controls the operation of the selector-operating shuttle;

Figs. 17 to 20, inclusive, are fragmentary views illustrating modifications of the receiver selecting mechanism; 7

Figs. 21, 22 and 23 are diagramsof different circuits in which the improved system and apparatus are applicable.

The transmitter and receiver of the improved apparatus are both mounted upon a common base 1 and are operated by a common motor 2. The operation of the receiver is controlled by a magnet 3 and, in the preferred form shown the operation of the transmitter is controlled by akeyboard. A small electric motor 2 is preferably employed and, for convenience in assembling, is mounted on a base 4 removably fixed to a plate 5 that is detachably mounted upon the upper face of the base 1. The motor shaft 1s provided at its inner end with a fly wheel Gland its outer end is connected by a pair of beveled ears 7 to a fly ball governor 8.

The latter 1s connected to a movable conable contact, the governor maintains the speed of the motor at the desired uniform 'rate. The spring 10 is connectedto an adjusting screw 12 for regulating its tension 1 and by adjusting this screw-and the contact 11 the desired rate of speed for the motor can be obtained.

The base 1 is a hollow casting and has an extension 13 at its lower front portion. The

transmitter keyboard comprises finger keysbase extension and engages the downwardlyand U-springs 25 normally uphold the key front portion of the base, and with the bails engaging the fingers 21. These springs are 14 and a s ace bar15. Thekeys are car ried upon t e upturned forward ends of a set of levers 16, which are arranged within the upper forward en s extending outwardly-through an opening in the base and over the base extension 13. Frontand rear. comb bars 17 and 18 are provided for guiding the key levers and the latter-are connected to the rear comb bar by a--'common-pivot rod. 19.

The space bar is mounted on a bail 20- that is pivoted on theupper face of the offset forward end of one of the key levers.

The characters are represented bypermutations of two different line conditions.ex-. tending through a definite number of time intervals or units. Preferably a five interval or five-unit signal code is employed and the signals are represented by permutations either of current and no currentor DIE-POSI- tive and rtegativ e impulsesextending through. the five tlme intervals or units of each signal.

To selectively determine the signals to be transmitted, the key levers are provided with depending fingers 21 which variably operate a set of five bars or bails 22 that extend transversely below the levers. 'An additional starting bar or bail 23 is provided andis uniformly operated by all of the key levers. These bails are-pivoted on comb blocks 24 fixed in position at the sides of the base 1 levers and bails with the key levers engaging a transverse stop portion 26 at the upper provided-with hooks at their upper ends which engage the key levers and the arms of the bails, and the'lower downturned ends of the springs engage openings in a fixed transverse bar 27. The. extent of depression of the key levers and bails is limited by a stop 28 fixed to the bar 27 and projecting forwardly beneath the bails.

The bails 22 are provided at their right-- hand ends with arms 29 that project upwardly through an opening in the base 1 and are pivoted to the rear ends of a set of five selecting members or fingers 30. The selecting fingers extend forwardly through guiding notches formed in the upper portion of a common transverse bar 31. Bar 31 preferably forms part of the bail 32, which is mountedon a pivot pin or shaft 33. The latter is mounted in rearwardly projecting arms or lugs 34 formed upon an upright bracket 35 'that isfixed to the base 1. An

upwardly extending arm 36 on the bail carries an insulated contact 37 that is arranged to engage an insulated adjustable contact 38 on the upper end of the bracket 35. These contacts form a transmitter switch and are preferably normally held in engagement'by rtion of the base with .their,

a spring 39 which extends between the lower portion of. the bracket and the depending vided with U-shaped forward ends which pivotally engage the pin or shaft 33 and their rear ends extend through the guiding notches of the bar 31 and rest upon the forward ends of the controlling fingers 30. At their rear ends the. switch shifters are provided with beveled shoulders 41 on their lower edges and with raised lugs 42 on their upper edges, and these shoulders and lugs are arranged to be engaged respectively by the beveled forward ends of the selecting fingers-30 and by-a set of five cams 43 which are arranged in a helical series on a transmitter actuating shaft 44.

Shaft 44 is journaled in suitable hearings on the bracket parts 34 and is driven from the motdr 2'through the medium of suitable connections controlled by a clutch. In the arrangement shown (see Figs. 1, 2 and 7), the clutch is mounted on a short horizontal shaft 45 which extends from front to rear of the machine and is journaled in two-

brackiets

46 and 47 mounted on the base plate 5.

A worm wheel 48 is mounted on the rear end of the clutch shaft and engages a worm 48 on the shaft 49 that is continuously driven,

when the machine is in operation, by the motor 2. The forward end of the shaft 45 is connected by a pair of beveled gears 50 of equal size to the transmitter shaft 44, or preferably, as shown, to an intermediate shaft 51, which is journaled in the rearwardly projecting lug on the bracket 47 and in a bracket 52 on the base plate 5. The intermediate shaft 51 is in line with the transmitter actuating shaft 44 and is connected thereto by adetachable coupling which preferably comprises two disks, 53 and 54, adjustably fixed by set screws to the respective shafts, and one of which is provided with an eccentric pin 55 engaging a notch in the other disk.

The worm shaft 49 is-journaled in lugs on bracket 46 in line with the motor shaft and is preferably connected thereto by a similar detachable coupling comprising two'disks56. The transmitter clutch comprises driving and driven

members

57 and 58 havlng conical working faces (see Fig. 7). The driving-clutch .member 57 is in the form of a metal cup and is fixed to the hub of the worm wheel 48. The worm wheel and driving member are loose on the shaft 45 and a yoke 59, fixed; to the bracket 46, engages a groove in the hub of the worm wheel and holds 'it and the driving clutch member against axial movement. The driven clutch member 58 ispreferably formed of wood and is fixed to a flanged sleeve 60 that is pinned to the clutch shaft 45. This shaft can shift in axial direction to a slight extent through its bearings '61 and 62 and throughithe hub of the gear 50 thereon: --The forward end of the shaft is squared and engages acorresponding bore in the hub of the -gear 50 to drive the latter. This axial 1 movement of the shaft 45 serves to engage and disengage the clutch members. The driven clutch member 58 is provided on its outer face with a cone 63 which is arranged 'to engage the internal face of an annular brake 64 that is carried on the bracket 47 L by. means of two pairs of screw pins 65 and 66. The screws 65 extend loosely through Y openings .in the bracket and are adjusta threaded into .the body of the brake 64. The

1 screws 66 are fixed to the bracket and the rear ends thereof engage guiding openings in the brake (see Fig. 1). Springs 67 coiled aboutthe screw pins 66 yieldingly hold the brake in position with the heads on the outer ends of the screw engaging the outer face of the bracket 47. By means of the screws 65 the position of the brake and the tension of the springs 67 can be ad- ;A heavy spring 68 coiled aboutthe forr, ward end of the clutch shaft 45 extends between the flanged bearing 62' and the loose tends to shiftthe clutch shaft rearwardly' and move the driven clutch member 58 therethe washer and the sleeve. This spring on into operative engagement with the driving member 57. Inthe normal or zero position, however, the shaft is held, by a trip arm or lever 70,-inits forward position -70 is pivoted at its upper-en tri against the tension of the s ring 68 and with the cone 63 of the driven c utch member en'- arm or lever in .a yoke 71 and its lower end engages a guiding yoke gaging the brake 64. The trip 72, both of the yokes being fixed to and prov 4a jecting rea'rwardlyfrom' the bracket 46. A roller 7 3, journaledwithin an opening in the lever, engages the'rear face of a cam dis 74 that is held by a set screw upon the f rear end of the clutch shaft 45 and whichis provided with an eccentric lug 75 arranged to co-operate'with the roller 73. A locking latch 76 is arrangz'edto engage the lower end of the trip arm 0. This latch is mounted on the horizontal rock shaft 77. The latter is 'onrnaled in suitable bearing lugs on the ase plate5 and is provided at its left-hand end with an arm 78 which extends down-. wardly'through an o ening in the base and is connected by a lin an starting baror bail 23.

79.to an arm"80 that depends from the left hand pqrtion. of the I .f-t-llnthe; normal or. zero fposition of the "transmitter the latch 76 engages the lower J end-*of the trip arm 70 and the roller'73 on esthe latter engages the cam lug 75 to thereby hold the shaft 45 and clutch member 58 "ithereon forward with the spring 68 ,com-

:pressed and the cone 63 engaging the brake 64. When any transmitter key 1s actuated, the starting bar or bail 23 is depressed and latch 76 drawn down to release the trip arm. Spring 68 then serves to quickly engage the clutch members and the transmitter actuat-. ing shaft 44 is driven in the direction-indicated by the arrows in Figs. 3-.and 4. 'As soon as the cam lug 75 clears the roller 73 a light spring 81 (see Fig. 7) draws the trip arm forward so that it is re-engaged by the latch 76 as soon as the shifted key is restored to normal. The shifted key 'will usually be restored to normal before the shafts .44 and 45 complete a single revolution. Then, since the trip arm is locked by the .latch 76, the engagement of the cam lug 75 with the roller 73 will shift the shaft 45 forwardly and move the clutch member 58 thereon out of engagement with the driving member 57 and into engagement with the brake 64,; so that the

shafts

44 and 45 are arrested with the flat rear end of the cam lug 75 engaging the roller. This disengagement of the clutch is aided by the .momentum of the moving parts and thepre ferred clutch and brake construction set forth acts efliciently to effect the quick starting from and stopping in zero position of the transmitter actuatlng shaft.

As shaft 44 rotates the cams 43 thereon move in succession over the rear ends of the corresponding switch shifters 40. The lugs 42 on the latter are, however, normally out of the path of movement of the cams'43 but, when a key is depressed, one or more of the selecting or controlling fingers 30 are moved forward and lift the rear ends of'the corresponding switch shifters so that the lugs 42 thereon are engaged by the respective cams 43 as shaft 44 rotates, and this i operation of the cam lugs will depress the rear ends of the switch shifters, the forward ends of the selecting or controlling fingers, and the common transverse bar 31 of the bail 32, to thereby open the transmitter during the initial portion of each revolution of shaft 44 'to shift the transmitter con- --tact 37.

The cams 43\ and'82 are preferably formed 7 upon separate disks held in placev on the shaft by spacing washers 84 and a nut'85, I

to thereby form in effect a single cylindrical cam member or support the surface of which is divided into seven equal spaces or units. The

cams

82 and 43 extend in succession through six of these spaces, leaving one l space unoccupied. The vacant'space or gap the lugs 42 of the switch shifters and the lug '83 on the bar 31. At each revolution of the shaft cam 82, as stated, engages the lug 83 to. impart an initial or starting imtransmitter shaft.

pulse to the line. Cams 43 then pass in succession over the rear ends of the switch shifters 40 and, during the interval that each cam passes over the lug 42 of they corresponding switch shifter, the transmitter switch contacts are either opened or closed in accordance asto whether or not the rear end of the switch shifter has been raised 'by the corresponding controlling finger 30.

A starting pulse followed by a permutation of two different line conditions, and representing a character signal, is thus imparted to the line at each revolution of the As shown, the

cams

43 and 82 are provided with concentric outer edges and beveled end portions, and the extreme beveled ends of adjacent cams terminate in alignment, as most clearly shown in- F ig. 4. The

lugs

83 and 42, which co-operate with the cams, are correspondingly beveled and the arrangement is such that the startingpulse or interval and the five intervals or pulses of the selective signalcode are .of uniform length. Also, with this arrangement, the pulses or line conditions follow each other with no gaps or spacing intervals between them.

Means are provided for locking the shifted keys and holding the other'keys against operation. For this purpose a. lock bar 86 'extends transversely below the key levers 16 and is provided with a beveled rear edge arranged -to co-operate with beveled lugs 87 formed upon the fingers 21 of the key levers. The lock bar is attached to'the lower ends of two rock arms 88 which extend upwardly through openings in the base 1, one being pivoted to a lug on the bracket 35 and the other ,to a bracket 89 on. the base. The right-hand arm 88 is provided with an upwardly and rearwardly inclined extension and carries a roller 90 arranged to engage the periphery of the disk 53. A spring 91, connected to the right-hand arm 88, holds the roller in engagement with'the disk 53 and the latter forms a cam for operating the lock bar. This disk is circular through the greater portion of its periphery, but is provided with a recess which is engaged by the roller 90 in the zero position of the transmitter, so that the lock bar 86 is held out of the path of movement of the lugs 87. As soon as the key is" depressed, however, the cani53 shifts the lock bar rearwardly and co-operates with the lugs 87 to hold the shifted key "leverin actuated position and selections. mass is of such length that the keys and the other key levers against. movement.

Preferably the cam 53 and lock-bar-86 are arranged to co-operate with the beveled'lug 87 of the selected key to complete its s'hift.

Slightly in advance of the completion of 70 each revolution of the transmitter actuating shaft 44 the roller drops into the recess. of the cam 53 and the shifted key and parts controlled thereby arerestored'to normal in readiness forthe transmission of the suc- -75 but this necessitates the use of some means for storing the last or the last two impulse In the form shown, the cam. re-

signal selecting bails or bars are released and restored to normal during the transmission of the fourth pulse of each signal, and means, most clearly shown in Fig. 5, are provided in connection with the fifth'- impulse controlling finger for permitting the operation of a key during the transmission of the fifth pulse. p

The arm 29 of the fifth bail is cut olf and is provided with an upwardly extending spring arm 92 to the upper end of which the corresponding controlling finger 30- is pivoted. The latter extends rearwardly-of its pivot and alight spring 93 extends between its rear end and the arm 29. The controlling finger 30 is provided near, its forward end and on its lower edge with a short lug 94, which normally lies in rear of the bar 31. The fifth impulse cam 43, as shown,

is providedwith an extension 95 of the same length as the other cams but of less height and arranged in line with the fourth impulse cam. When a key which selects the fifth bar or bail 23 is depressed, the projection 94 on the corresponding controlling finger 30 will strike against the bar 31, so that the controller cannot be shifted to lift the corresponding switch shifter and the spring arm 92 will be flexed as shown in full lines in Fig; 5. The depression of the key will. also, of course, close the transmitter clutch and start the rotation of the shaft 44 and cam 53 thereon, and the latter will shift the locking bar and hold the selected key down, as also indicated in Fig. 5. Then, when the bar 31 is depressed by the engagement of the starting cam 82 with the lug 83, a the spring 93 can then slightly lift the forward end of the controller 30'.so that the flexed spring arm 92 will shift it forward to the position indicated in dotted lines in Fig.

5, and thereby raise the fifth impulse switch shifter 40. In this position the lug 94 will be in front of the bar 31 and, at the proper 3 time, the fifth impulse cam 43 will engage. o

' transmission of the character signahand the I and actuate the fifth impulse switch shifter.

'. The locking 'bar releases theshifted key as soon as the fourth impulse has been transmitted, but the fifth impulse controller 30 is prevented from moving back to normal position.in case the bar 31 is depressed by the fourth impulse camby the extension 95 of the fifth impulse'cam. This extension holds the controller 30 sufficiently downward to prevent its projection 94 from clearing the bar 31.- As spring 93 is much lighter than the spring 39, ofthe rocking bail 32, its action cannot open the contact. If the fifth bar or bail 23 has been selected for a letter, the controlling finger 30 remains in its shifted left-hand position at the completion of the sprin arm 92 will be flexed in the opposite direction from that indicated in Fig. 5. -If

the fifth bar 'or bail is selected for the succeeding character, the controlling finger 30' remains in shifted position; but, if it is not selected, it will slip back over the bar 31 when the starting cam 82 moves the bar downwardly. If desired, similar storing means could be associated with the fourth impulse selecting devices. ,This arrangement for storing the fifth pulse selections of the code signals permits of the rapid operation, of the transmitter in sending a message, and, indeed, without arresting the transmitter shaft, since the keys can be operated so rapidly that before the transmitter and

clutch shafts

44 and 45 have completed a revolution .the latch 76 will have been shifted to released position and the trip arm 70 will not act to open "the clutch. Nevertheless, as the

cams

82 and 43 and the blank these brackets are connected by horizontal portion of the cam member on the shaft 44 pass in succession over the lug 83 and the lugs 42 of the switch shifters, the code Sigrest the transmitter in zero position, ready,

for further operation.

The parts of the receiver selecting mechanism and printer are mounted on the rear bracket 46 and a front bracket 96 secured to the base plate 5. The upper portions of brace bars 97. The receiver has a main shaft 98. which is journaled at its forward end in V a bearing 99 on the upper portion of the bracket 96, and its rear end extends throughan opening in the upper portion of'hracket 46 and is journaled in a bearing 100 carried bv a U-shaped support 101 fixed to the'rear face'of the bracket. Shaft 98 is actuated from the continuously operating motor-' driven shaft 49 through a clutch onashaft 1 102 parallel to shaft 98 and journaled in

f bearings

103 and 104 mounted, respectively,

in the rear bracket and 105' on the base plate.

The receiver clutch is similar in'construc-"i; tion to the transmitter clutch and'co'mprises a driven member 106 pinned to shaft .102 and having external and internal cone sur-- faces which co-operate, respectively, with [75. cup-shaped driving member 107 andan annular brake 108. The driven member 106 is. formed of metal and is provided with any integral gear 109 that meshes with a gear 110 that is of the same size-and is fixed to a collar 111 on the main shaft 98. The driving clutch member 107 is provided with a wooden liner 112 for engagement with the external v surface of the driven unember1106. The brake 108 is provided with a wooden cone 113 adapted to en age the internal surface of the driven mem er. A clutch trip lever 114 is pivoted in a lower yoke 115 and is 1 guided in the upper yoke 116, which yokes are mounted on the bracket 46 and project rearward therefrom. The trip is held in normal position by a toggle latch controlled by the armature of the ma et 3. In other respects the arrangement 0 the receiver clutch and brake and the parts connected thereto are similar to the corresponding parts of the transmitter clutch and brakeand are core respondingly numbered. It should be noted, however, that the worm gearing between the driving shaft 49 and the two clutch shafts is such that the receiver shaft 98 is driven at a speed slightly greater than that at which the transmitter shaft 44 is driven. In the form shown, the worm wheel-'11... on the :clutch shaft 45 of the transmitter has thirteen teeth and that'upon the receiver clutch shaft 102 has twelve teeth. Normallythe clutch shaft 102 is held in its forward position by the engagement of a flat end of I the eccentric cam lug 75 thereon with the roller 7 3 on the trip 114 and with the driven clutch member inengagement with the brake 108 and with the actuating spring 69 com 7 pressed. v v i a small bracket The receiver magnet 3 has two spools in the form shown, and depends from 'hori zontal. support 117 projecting mama-r61 2} I from bracket 46. It is provided with alight armature 118 connectedby pivot screws 119 I to cars formed upon the outer .end' of the 29 support 117. A light spring 120 extends be tween the armature and an adjusting screw 121 and tendsto hold the armature in one. gagement with the lower end. of an adjust... able stop screw 122. Screws 121 and are threaded through two rearwa'rdly pro jecting lugs 123011 the upper portion oi-flm support or yoke 101. The magnet 3 is pre erably arranged in a closed circuit and normally holds its armature 118 down against "9 Y the tension of the spring 120, but, if desired, .this arrangement could be reversed and the magnet arranged in a-normally open circuit. Preferably the magnet is connected in circuit with the

transmitter contacts

37 and 38 of the apparatus, so that it responds to the operation thereof as well as to the operation of transmitter contacts located at the distant station or stations.

-- lever.

. The outer pivot pin 119 of the armature also forms the pivot for one member, 124, of the toggle latch which controls the trip lever 114. The ether member 125 of the latch is in the form of a double link and is connected by a pivot 126 to the upper end of the trip The two toggle members are connected by arule joint adapted to be fixed in one direction only (upwardly in the form shown), and comprising a pivot 127 and a stop 128 formed on the member 125 and adapted to be engaged by the extended forward end of the toggle member 124. A light spr' 129, connected to the outer end of the pivot in 127. and to the stud of the roller ont e trip lever, normally holds the forward end of toggle member 124 in engagement with the stop-128. In this position the pivots of the toggle members lie in a line extending. at right angles to the trip lever,

so that pressure exerted on the roller 7 3 byv the cam lug cannot trip the latch. The

tri lever is thus locked in normal position to old the receiver clutch open but a slight upward pressure on the members of the toggle latch will throw their pivots out of ah%1ment so that they can be flexed as shown in ig 15 and permit the rearward shift of clutch shaft 102 by its spring 69 to thereby move the driven clutchmember 106 out of engagement with the brake 108 and into engagement with the drivin member l07. This release of the tog le late is effected by a lug 130 that exten s laterally from the armature 118 beneath the toggle member 124.

To permit the easy flexing of the toggle, the

forward end of member 124 and the face of the stop 128 engaged thereby a're beveled as shown. A

The toggle latch is thus tripped when magnet 3 is deenergized by the starting pulse or interval of each signal and the receiver clutch is closed to thereby effect the rotation of the main shaft 98. When the magnet is energlzed to pull down its armature,-

sprin 129 will restore the toggle members to thelr aligned, locking position. This will occur during the spacing intervals betweensifgnals, so that at the end of the revolution 0 the

receiver shafts

98 and 102 the eccenj tric cam lug 75 on the latter will ride up on the roller 73 of'the trip 114 to open the receiver clutch, shift the driven member thereof into engagement with the brake, and arrest the

receiver shafts

98 and 102 and parts operated ithereby. As inthe case of the transmitter clutch, this opening movement is aided by the momentum of the moving parts. The brakes'of the two clutches can be so adjusted that the extent-of movement required of the clutch shafts is slight, and the clutch and brake members actto start and stop the actuated parts quickly and with certainty. 1 To aid in effecting quick starting of the receiver clutch, theco-operating cone surfaces of the driven member and brake are inclined at a somewhat sharper angle than the engaging faces of the drivingand driven clutch members. The end thrust on nal and co-operates with meansrotated by the shaft to position a set of five selectors. The latter, in the form shown, comprise pins or plungers 131 slidably mounted in the ends of a horizontal yoke orsupport 132 and arranged in an arc concentric with shaft 98. Support 132 is fixed to the upper end of the rear bracket, extends forwardly therefrom, and has two downwardly projecting arms 133 thatengage the brace rods 97. The selector pins or plungers 131 are normally held in rearward or retracted position and are shifted'forwardly by a setof levers 134 which, in turn, areoperated by' a series of pins 135. The latterare mounted in bearlngs 136 on bracket 46,and are arranged in a circle. concentric with shaft 98. The levers 134 are centrally pivoted in the forked rear ends of studs 137 fixed to the bracket 46. The levers are of different lengths and are so shaped that, as most clearly shown in Fig.

8, the upper and'lower ends thereof, respec-.

tively, engage the rear ends of'the selecting pins and heads on the rear ends of the ac .tuating pins 135. Separate leaf springs 138,

fixed'to the'support 132, extend forwardly over the selecting plungers and are provided with depending V-shaped forward'ends' that engage small, circular, bevel-edged lugs fixed to the plungers. When the lugs are in the rear of the V-ends of the sprlngs, the

latter hold the plungers, the levers 134 and pins 135 innormal retracted position with ihe heads of the pins engaging the bearings 36. i The forward ends of the pins 135 extend through notches 141 formed in a cam ring 142 thatis secured to the front face of the bracket about the opening therein through which shaft 98 extends. The cam ring is concentric with the shaft and the latter carries-aspring-actuated shuttle 143 having a roller 144 thereon arranged to engage the cam. The shuttle is cylindrical and is mounted on a sleeve 145 fixed to the shaft by set screws 146 extending through a flange posed between the sleeve and shuttle.

147 thereon. The roller 144 is journaled on an arm of the shuttleand, as stated, engages the face of the cam ring. To avoid sliding friction, the engaging faces of the roller and cam are conical. A horizontal pin 148, fixed to the shuttle arm, extends through an opening in the flange 147 and compels the rotation of the shuttle with the shaft, but permits its axial movement on the sleeve. Preferably, anti-friction rollers areinterA'- spring 149 on pin 148 presses the shuttle rearwardly and holds the roller in engagement with the cam, and also serves to folce the roller into the cam notches 141 against the pins 135 -to thereby shift the levers 134 and the selecting pins or plungers 131. This the notch far enou h to actuate the correspring also takes up any end play of the shaft 98 and holds it in position, with a shoulder 150 thereon engaging the shaft bearing 99.

The shuttle. has a flange 151 on its near end which co-operates with a finger 152 projecting forwardly from the armature 118 and se cured thereto by screws 152'. These screws extend through short slots in the finger 1.52, so that the position of the latter can be adjusted. As the circuit of magnet 3 is opened and closed, the shift of its armature moves the rear end of the finger 152 into and out the roller passes through one of the notches the rearward shift of the shuttle, effected by the spring 149, will be arrested by the engagement of the finger with the shuttle flange 151 and the roller will not drop into sponding pin 135. f, however, the magnet is 'energ1zed at this time, its armature will be held down and the rearward shift of the shuttle and roller completed "to thereby engage and shift the pin and move the corresponding selecting plunger 131 forward. When any selectin the beveled-edge lug 140 thereon passes beyond the V-end 139 of its spring and is thereby held in shifted position.

The shaft 98 and the selector-actuating shuttle thereon rotate at such a rate and the notches 141 of the cam ring are so uniformly and angularly spaced that the roller 144 passes through the notches in synchronisln with the five selecting impulses or unitsof the transmitted signals, and so shifts the selecting plungers forwardly or leaves them in normalretracted position, as the circuit ters of the transmitter cam sections' In plunger is thus shifted,

of magnet 3 is, either closed or opened by the corresponding selecting impulses of each signal.

-The shuttle is so positioned on the shaft that the roller thereon registers with or passes through notches 141 of the cam ring 142 during the mid-portions of the selecting intervals or units of the transmitted signals, as indicated in Fig. 16, so that the magnet changes the position of its armature while the shuttle roller is on the high portions of thecam. And since the high cam portions then hold the rear end of the shuttle spaced slightly in front of the path of movement of the forward end of the finger 152, the magnet can shift its armature freely, Moreover, since the high cam portions the cam sections 43 that impart the selecting intervals of the signals to the line. To inwith the proper operation of the receiver. member during the spaci interval at the end of each signal, it isriven, .as stated, slightly faster than the rota transmitter member and, in order that t e rotary receiver actuating member shall pass through its operating positions during the midpor tions of the signal intervals, the notches of the receiver cam are not only relatively shorter than the corresponding operatingz portions of the transmitter cam, but are angularly spaced farther apart than the cenother words, the selecting units of the re-, ceiver cam are relatively longer than those of the transmitter cam to compensate for the difleren ce in speed, and the portion of the"- receiver cam that correspond to the starting and spacing intervals are relatively shorter.

The relative shortening of the starting and stopping portions of the receiver cam is indicated in Fig. 16, but otherwise no at tempt is madeito indicate this relative difference in s eed.

The position of the shuttle and of the roller 144 thereon canbe adjusted in circumferential direction on shaft 98 by means of the setsc'rews 146, which, as shown in Fig. 12, engage an annular. groove in the shaft. The shuttle is thus set 'to' take care of the lag in the startin operation of the receiver clutdh, and whic as described, is effected by-the starting impulse of each sig- 'terval of the signal and the starting tion of the cam represents, the lag 1D the nal. The shuttle will be so set that its roller i wiil pass through the first notch of the cam at themid-port1on of the first selecting impulse or interval. The relation of the portions of this cam to the intervals or units of the signals is indicated in' Fig. 16. The difference in length between the starting 111- startingoperation of the receiver clutch. As noted the high portion of the cam between the fifth and first notches thereof, and which corresponds to the startin pulses and separating intervals between t e signals, is relatively shorter thanthe corresponding sections of the transmitter so that the entire receiver cam is preferably about 6 units in length, The starting and stopping positions of the pin-actuatin roller are indicated in full and dotted lines in Fig. 16, but, of course, these positions are coincident; as already-noted, the zero position of the roller can be adjusted to take care of the lag in the operation of the starting clutch.

When two or more machines are connected 'or placed in communication, the motors are set to run at substantially the same speed,

but, as noted, the receivers are so geared to the motor shafts that they run slightly faster than the transmitters and are 1n-v variably arrested during thev spacing intervals between the signals and again started in exact'phase with the transmitted impulses by the initial starting pulse of the succeeding signal. 'In other words, any variation in phase between a receiver and the signals transmitted thereto from a.- distant station is corrected at the intervals :between the signals, so that there can be considerable variation in the speeds of the motors at different connected stations. Hence, although the timingof the transmitters and receivers dur-' ing each signal period is determined bythe rate of speed of thelocal motors, the means for adjusting the speed of the motors at different connected stationsjdoes not require frequent attention. It shouldv also be noted that the transmitter and receiver of each apparatusl are independently driven by the motor. For this reason, and since the operationof the transmitter switch is initiated independently of the starting impulses, and

' imparts the starting intervals to the line i after it leaves or passes through its normal.

or zero position, the relation between the starting and selecting impulses of the transmitted signals-is in no way afl'ected by the ration of the startin clutch, or ot erelectrically contr fied. start- 7 ingmeans. on this account, the receiver need'not be frequently adjusted to take care,

of variations in the lag of startin ueens of transmitters located at diflerent I 'stant sta- -tio ns.,- 'and tofwhich "the. receiver is connected, Again, since the starting or correct-'- not have to magnet,

accuse 1n impulses accompany all transmitted signa no adjustment, of the receiver is renoted, the receiver shuttle c iefly requires adjustment to take care of the lag in the op eration of its own" local starting means, and

this adjustment can be made when the machine is set u and, for the most part, .does 7 changed unless something affects the time of operation of its starting clutch.

quired to take care of line la As already- While various recording means could be used, means similar to that shown in the United States patent to Baudot, No. 388,244,

dated August 21, 1888, is preferably em-- ployed. However, instead of employing continuously rotating combiner disks and typewheel,-as in the Baudot printer, these parts are connected to, and are preferably mounted I on, the intermittently rotating shaft 98. The

combiner disks

153 and 154,-having arflange 155 clamped between them, are mounted on a collar 156 on shaft'98' in rear of the front bracket. One of the disks and the flange are preferably annular and are fixed to the rim portion of the other disk, the hub of which is secured to the collar 156, the lat- .ter being fastened to the shaft by set screws 157. The'peripheries of the combiner disks are' provided with raised portions and notches or recesses, and are engaged by a set of five selecting fingers or feelers 158. The latter have upper ends of inverted U-shape 'and are fixed to a set of short, horizontal,

pivot pins 159 that are rotatably and slidably mounted in a support which is fixed to theupper portion of the front bracket and projects rearwardly therefrom. This sup-' port comprises a member161. a I p The upper portions of the selecting fingers have integral contact heads 162 and the head of the left-hand finger is enga ed by ah'ead 163 formed upon a rearwarddyprojecting arm 164 of a lever 165. This lever is arranged in front of the. plate 160 and its rearwardly projecting arm 164 is provided with a de' ndingportion 166, having lugs that are. xed to a pivotpin 167; whichis like the pivot pins 159 and similarly Imounted in the

plates

160 and 161. A spring 168,

plate 160 and a' U-shaped' connected .toan adjusting sc'rew- 169 and to the lever 165, forces the head 163 of the lever to the right .and holds the contact heads 162 in engagement with the-selecting fingers 158 bearing on the peripheries of-the

combiner disks

153 and 154. 1 i

The contact heads and the ivotpins of the lever 165 of the selecting ers are arranged in arcs concentric with t e shaft 98,

and the'pivot pins 159 of theselecting fingers are arranged, res ctively, in alignment with the, selecting p ungers 131; In their retracted positions the selecting fingers158 I rest upon the combiner 1 53, but they are 1 adapted to be shifted through a gap in the fla nge' 155 by the plungers 131 and into position over the combiner disk 154, as shown in Fig. 12. A restoring cam 170 on the combiner disk 154 extends through the gap of flange 155 and, near the end of the revolution of shaft 98, engages and restores any of the selecting fingers 158' that have been shifted.

The combiner disk 153 has a number of rearwardly projecting studs 171 which carry a thin, sheet metal, stop flange 172. The latter is annular inform and is arranged to engage the lugs 140 on the selecting plungers 131-and'arrest the forward movement there of when the latter are advanced by the selector-actuating shuttle, as previously described. The V-ends 139 of the springs 138, which engage the lugs 140 and hold the selecting plungers 131 in retracted position, also hold them, when advanced with the lugs, against the rear face of the stop flange 17 2. The latter is provided with a gap within which are arranged two oppositely-

inclined cams

173 and 174, formed upon a U-shaped piece 175 that is mounted on a block 176 on the rear face of the combiner disk 153. The lugs '140 of the selecting plungers 131 are normally out of the path of movement of these cams, but when the plungers are advanced, the cam 173, near the end portions of the revolution of shaft 98, will engage the lugs and further shift the plungers forward to thereby move the corresponding selectingfingers 158 from engagement with the combiner disk 153 through the ga in flange 155, and into engagement with disk 154. Immediately after this operation cam 174 engages the lugs 140 of the shifted plungers and restores them completely to their retracted position.

The restoring cam 170 for the selecting fingers 158 is arranged silghtly in advance of the

cams

173 and 174, as shown in Fig. 12, and these three cams act successively near the end portions of the revolution of shaft 98 to restore the fingers 158 that have been shifted at the previous operation, actuate the plungers 131 to again set the fingers,

thus transferring the received signal from one set of selectors to the other, and finally to restore the plungers in readiness to be positioned during the succeeding operation andjn accordance with the varied selecting impulses of the next signal. The parts of the receiver are shown approaching their normal zero position in Figs. and 12, and in this position in the other figures.

While as stated, the blank portions of the receiver cam which correspond tothestarting and spacing intervals of the signals are relatively shorter than the corresponding portions of the rotary transmitter member, neverthele s, as is clear from an inspection of Fig. 13, the angular space between the last and first selector operating positions of the actuating shaft 98 as determined by the angular spacing of the pins 135 is considerably greater than the other uniform spaces between the pins, so that ample opportunity is afforded for the adjustment of the stopped position of the selector actuating shuttle relative to its operating positions, and for the operation of the

cams

170, 173 and 174 by the movement of the shaft, before the eration.

A type-wheel 177 and a toothed wheel 17 8 for operating a printing arm are mounted on the forward end of the shaft 98 and rotate therewith. Wheel 178 is arranged to engage a tooth 179 on the inner end of a printing arm 180. The latter is pivoted on a stud 181 projecting forwardly from bracket 96, and a spring 182, connected at its outer end to an adjusting screw 183, tends to throw its inner end upwardly. Normally, however,

. first selector .setting of the succeeding opthe arm is held down by a catch 184 pivoted on the bracket 96 and engaging a lug 185 on the inner end of the arm. A' spring 186 connected to the catch holds it'in normal position with its lower end in engagement with an adjustable sto screw 187, and with a laterally projecting arm 188 on the catch engaging the left-hand end of a trip 189. The latter is centrally pivoted on the bracket 96 and its right-hand end is connected to the end of the lever 165 by a link 190 that is preferably formed of two adjustably connected sections.

The paper tape on which the characters are printed passes over a fixed guide pin 191, thence over a guide pin 192 on the arm 180, around an impression roller on the end of the arm, and thence over a feed wheel 194 that is journaled on stud 181. A springheld support 195, pivoted on a stud 195, carries a pressure roller 196 that holds the tape in engagement with the feed roller.

As stated, the selecting fingers 158 are set in accordance with the signal that is received during each'revolution of the shaft 98. At the next revolution of the-shaft the combiner disks rotate below the ends of the selecting fingers. As in the Baudot printer, the pressure of the head 163 of the springactuated lever 165 against. the. contact heads 162 of the selecting fingers 158 prevents any of the fingers from dropping into recesses of the combiner disks until the latter have moved to such a position that all five fingers can drop into recesses thereof. When this occurs, the lever 165 is lowered and the continued movement of the disks forces the selecting fingers upwardly and quickly lifts the lever 165. The combiner disks are so notchedor recessed that this movement of the le er cc rs hen the character on the type-wheel, that corresponds to.the particular setting of the selecting fingers, is in position opposite the impression roller 193.

The oscillation of the lever 165 thus effected first lifts and then uickly throws down the left-hand end of t e trip 189, so that it strikes and releases the catch 184. The spring 182 then moves the arm 180 anden ages its tooth 189 with the wheel .178 and the latter swings the arm on its pivot, presses the paper on the impression roller against the proper character on the typewheel, which at this instant is in print ing position, and moves the arm to the position shown in dotted lines in Fig. '10. The arm is arrested in this position, with its tooth 179 disengaged from wheel 178 and IGVOllltlOIl of shaft 98 a roller 199, on the with the impression roller out of contact with the type-wheel, by theengagement of :1 lug 197 on-the arm with the lower end .of

' a pivoted restoring lever 198, which at this time engages stud 1 95. -At the end. of the rear face of wheel 178, engages the upper end of the restoring lever and the latter shifts ,the printing arm back through blank spaces in the wheels 177 and .178 toit-s normal position in engagement with the catch184.

As in the Baudot' rinter, the shift .of the arm 180 effects the liatter space feed of the paper tape through'the, medium of spring I pressed holding andfeeding. pawls 200 and mounted on a pivoted spring-held arm 203.

200', pivoted, respectively, on the-arm and .on the bracket 96 and engaging a ratchet 201 fixed to the feed roller 194. A suitable inking roller 202 for the type-wheel is A blank portion of the type-wheel is adapted .to be brought to printlng position in response to a spacing signal. [Since the selectors are'set during one revolut on of the receiver and the corresponding character printed at the next revolution, and since the receiver is arrested after each revolution; the spacing signal must be transmitted to effect the printing of the last character of I the messa e. Preferably, the type-wheel has two sets of tylpe and is shiftable relatively to the toothed w eel 178 which controls the movement of the printing 'arm 180., For this purpose the type-wheel and an arm 204 are fixed to the ends of a common hub 205, which is looselv I .mounted on the forward end of-the shaft it and the and is held in place thereon by a washer A spring-held catch 207, pivoted on wheel 178, has

two notches for en a in thebeveledend g g g of arm 204 to thereby hold pe-whe'el in either one of two ositions re ati'velyto ,the'toothed wheel. e oppo'site end offarm 204 e ages a shifter 208 centrally pivoted on-wheel-1 78 and having two projections 209 which, as

theshifter is ,opemted, alternately overlap t f he pa e bet een t e t th o th the selected shifting pins 135.

7 the magnet wheel, one or the other of which is adapted to be engaged by the end of the printing. arm 180. At points corresponding to these two spaces of the toothed wheel, the typewheel is blank, so that, by sending suitable shifter signals, the printer arm can be actuatedto engage the projections 209 of the shifter and thereby adjust the position of the arm 204 and the type-wheel relatively to the toothed wheel 178 and bring either set of type into operation.

Modifications of the selector mechanism I are shown in Figs. 17 to 20, inclusive. In these forms the receiver magnets 210 are horizontally disposed and the armatures 211 thereof are mounted on vertical spring-held levers 212. The armature lever, in the form shown in- Figs. 17 and 18, has a fork 213 at its upper end and pins 214 thereon engage an annular groove of a shuttle 215 that is keyed to and is axially shiftable on the main shaft 98.. An arm 216 on the shuttle is provided at'its end with a bev eled cam 2'17- that is rotated by the shaft 98' past the forward ends of the selector shifting pins 135 and is moved into and out of operative relation with the pinsas the circuit of the magnet is'opened and closed. 3 In the form shown in Figs. 19 and 20, the armature lever has an "annular part or ring 218 which surrounds and is concentric with the shaft 98'and isprovided with a set of five internal cam lugs 219'. A sleeve 220, fixed t0 the shaft, has a lug 221 thereon, to which an actuating arm 222 is centrally pivoted. The arm is provided with inclined cam ends which co-operate, respectively, with the inclined faces of the cam lugs 219 and with the forward ends of the pins 135. A spring 213 tends to hold the rear end of sleeve.- As the actuating arm is rotated by the, shaft, the armature lever is shifted by the magnet'to move the cam ring 218 thereon into and out of the path of movement of the forward end of the actuating arm 222: and its rear end is shifted by the cam lugs 219 into and out of operative relation with lugs are, with the being arranged slightly in advance ofthe corresponding pin.

In bothof the modified forms, as in the form previously described, the pins 135 and the corresponding selecting plungers 131 are shifted or remain in retracted positions as response to the varied selecting impulses of eac 'signaL- In each of the forms, the rotary' movement of the selector actuating member, while initiated .by the selecting magnet in response to the starting condition of each signal, is effected under local control y t e mew-driv n r ce er sha o that The cam of course, spaced in accordance spacing of the pins 135, each lug circuit'is opened and closed in tor is effected and locally timed by the rotary movement of the main shaft, and the selecting magnet solely controls such reciprocating movement. Also, in these forms,

- the arrangement is such that the selector setting operations are effected without opposing the operation of the selecting magnet and without applying pressure upon the armature leverin a manner tendin to disturb its setting as determined by tie magnet. The improved receiver mechanism is particularly applicable for use in connection with the start and stop clutch mechanism, but certain features thereof could be employed in a receiver in which other means is used for maintaining its operations in synchronism with the receivedvsignals.

The different arrangements of the circuit which can be employed are shown in Figs. 21, 22 and 23. In Fig. 21, three combined keyboard transmitters and printing receivers at different stations are connectedin series in a common line, the receiver magnets 3 being interposed directly inv the line circuit. In Fig. 2, line relays 225 control local circuits for the receiver magnets. Obviously, these local circuits could be normally closed as shown, or normall open. At one station in Fig. 22, a modi ed transmitter, adapted for use with a perforated tape, is

provided with a set of five impulse selecting switches 226 and a collecting transmitter switch. The latter comprises a continuous ring contact 227 and seven segments of equal length adapted to be connected by a rotating brush 228. This brush takes the place of the rotary actuating cam member in the transmitter already described, and, like this cam member, is driven from the station motor through the medium of the transmitter start and stop clutch mechanism. After each signal and when its operation is arrested, the brush is in engagement with the segment I. This segmentis connected directly to the line battery and the

segments

1, 2, 3, 4 and 5 are connected to the battery by the normally closed selecting switches 226, that are adapted to be variably controlled by a perforated tape or, if desired, by a keyboard such ,as previously shown and described. No connection is made to the segment S I which imparts the starting impulses or intervals to the line. The operation of this transmitter is substantially similar to that of the transmitter previously described, exceptthat when the tape is employed to control the set of impulse selecting members or switches 226 a magnet 229 for shifting the switches, intermittently advancing the tape and tripping the clutch, is provided and its circuit is energized by asuitable switch operated by the transmitter shaft 44, upon which the rotating transmitter brush 228 is closed when the transmitter brush is in engagement with the segment I. A manually operative switch 232 is interposed in the circuit of the magnet to start and stop the operation of the transmitter.

Fig. 23 shows one of the terminal stations of a duplex line circuit. The contacts of a keyboard transmitter, the magnet of a printer, and a transmitting relay 233 are arranged in series in a local circuit. The printer in this circuit acts solely as a home recorder and the printer for recording received messages is arranged in another local circuit controlled by the tongue of a polarized line relay 234. As usual, the two coils of this relay are connected, respectively, to

main and artificial lines and both coils are connected to the coils of the transmitting relay 233, the latter having front and back contacts connected respectively to the unlike poles of a divided line battery. With this arrangement negative current will be normally imposed upon the line and signals, consisting of a positive starting pulse and five selecting pulses of one or the other polarity, will be imposed upon the line by the relay 233 under control of the

transmitter switch contacts

37 and 35. The transmitter and receiving and home recording printers can all be operated from a common motor through separate start. and stop clutches. .Other changes that. have been indicated tors movable at an angle to its rotary path to effect the operation of selectors, a startand stop clutch for initiating and arresting the rotary movement'of said actuator at the beginning and end respectively of each sig nal, and a single magnet. responsive to the received signals for tripping said clutch and variably controlling the angular movement of said actuator. p

2. In a receivin apparatus for selecting telegraphs, a set 0 selectors, a common selector actuator, a power drive for rotating said actuator into relation with said selectors in succession, said actuator being movable at an angle to the rotary path into position to