US1989727A - Printing telegraph apparatus - Google Patents

Description

Feb. 5, 1935. w. J. ZENNER 1,989,727

PRINTING TELEGRAPH APPARATUS Filed Sept. 9, 1953 6 Sheets-Sheet 1 F/Gt! INVENTOR W41 75? J. ZE/V/Vfk Feb. 5, 1935. w, J. ZENNER PRINTING TELEGRAPH APPARATUS Filed Sept. 9. 1935 6 Sheets-Sheet 2 -INVENTOR W417i? J. ZE/VNfQ F/G. E 207 w. J. ZENNER 1,989,727

PRINT ING TELEGRAPH APPARATUS Feb. 5, 1935.

Filed Sept. 9. 1933 6 Sheets-Sheet 3 INVENTOR WALTER J. ZENNE/P ATTOR EY PRINTING TELEGRAPH APPARATUS Filed Sept. 9, 1953 6 Sheets-Sheet 4 INVENTOR WALTEQ J. ZEN/v52 ATTOR EY Feb. 5, 1935. w. J. ZENNER PRINTING TELEGRAPH APPARATUS Filed Sept. 9, 1933 6 Sheets-Sheet 6 INVENTQR WAIL 75/? J. ZDV/Vcr;

ATTOR Y AAC UN X FIG;

ATT

4..iO87a3n% Patented Feb. 5, 1935 UNITED STATES PATENT OFFICE Teletype Corporation, Chicago,

tion of Delaware Ill., a corpora- Application September 9, 1933, Serial No. 688,713

20- Claims.

This invention relates to printing telegraph apparatus and more especially to improvements in the type of printing telegraph receiving apparatus wherein the characters are printed upon a tape.

The present invention contemplates the embodiment in a printing telegraph apparatus of novel mechanisms, the object of which is to produce a compact and highly efiicient device capable of smooth, high speed operation.

The foregoing and other objects of the invention are achieved by the provision of a printing telegraph receiver comprising a six unit code disc selector mechanism of the latch type, in which the code discs are arranged in superposed horizontal planes. The code discs are permutably set by a selector mechanism and the component parts of the apparatus are so arranged that the recording of the preceding character occurs during the period a group of code impulses for a succeeding character selection is being printed, thereby providing an overlap of the selecting and printing operations. Specifically, the selector mechanism, which is similar to that disclosed in S. Morton et al. Patent 1,745,633 of February 4, 1930, is operatively positioned to one side of the code discs and embodies a single selector electromagnet directly responsive to line current impulses, a feature of the invention residing in the incorporation in the selector mechanism of novel means for preventing the actuation of the release latch for initiating selective operations except in response to a start impulse.

Directly above the code discs and concentrically disposed therewith are the actuating bars,

striker disc, and type bars. Arranged around the periphery of the code discs and operatively associated with the'actu'ating bars are a series of selectable elements or drop bars. Printing or recording by the type bars is effected upon a tape through the use of an inking ribbon which extends transversely of the tape at the printing point, the printing zone being located centrally of the circularly arranged type bars. In the specific embodiment disclosed, the type bars are divided into two substantially semi-circular groups disposed one on each side of the directional movement of the tape, and a ribbon feed mechanism is positioned outside the area circumscribed by the type bars, the ribbon being directed between the two groups of type bars so as to cross upon itself obliquely and then extends transverselyacross the tape, the effect of such construction being to permit immediate visibility of the printed record and to render the apparatus readily adaptable for projection purposes. The type on each type bar is positioned so as to print on either the near or the far side of the tape to efl'ect ofi'set printing characteristic of stock quotation operation. However, single line printing can be produced, if desired, by properly positioning the type faces on the type bars.

The various mechanisms of the printing apparatus herein disclosed are arranged in vertical superposed relation, and in order to prevent the paper or tape dust, formed by the frictional relation between the tape and its operatively related parts, from mixing with the lubricating oil and resulting in harmful results to the subjacent mechanism, the present invention contemplates the provision of a dust receiver of such conformation as to collect effectually the tape dust as well as to prevent its admission into the mechanism located therebelow. A double latch for controlling the release of the main drive shaft and its operation and restoration, and the particular combination of friction and positive clutch as adapted to the structure according to the present invention are other features which will be hereinafter disclosed in detail.

Many features included in the disclosure of the present application are also disclosed in copending application Serial No. 651,664 filed J anuary 14, 1932 by A. H. Reiber et al. and the following copending applications also filed on September 9, 1933; namely, Serial No. 688,711 filed by H. L. Krum, Serial No. 688,726 filed by C. W. Swan, and Serial No. 688,730 filed by E. W. F. Hanke et al.

A better understanding of the invention may be had from the following description, taken in conjunction with the accompanying drawings, wherein,

Fig. 1 is a perspective view of the printing telegraph apparatus embodying improvements ac-' cording to the present invention;

Fig. 2 is a plan view of the apparatus;

Fig. 3 isa vertical cross-sectional view of the apparatus taken on line 3--3 of Fig. 2;

Fig. 4 is a transverse cross-sectional view taken on line 4-4 of Fig. 3;

Fig. 5 is a perspective view of the main operating shaft assembly together with certain related parts;

Fig. 6 is a plan view of the positive orientation control device;

Fig. 7 is a sectional view taken on line 77 of Fig. 6;

Fig. 8 is a perspective view of the selector shaft release means;

til

Fig. 9 is a view illustrating the tape feed mechanism of the apparatus; and

Fig. 10 is a representation of a portion of tape printed with the apparatus according to the present invention.

Referring to the drawings wherein like reference characters indicate the same part through the several views and more particularly to Figs. 1 and 3, there is shown a main supporting frame generally indicated by the numeral 11, which carries in its lower compartment a motor 12 which is separated from the other parts of the apparatus superposed thereabove by a solid partition. Frame 11 also carries the parts or units; namely, main shaft assembly, the operating mechanism, the selector mechanism, and the typing unit, generally indicated by the numerals 13, 14, 15, and 16, respectively, all of which are arranged vertically so as to produce a compact, self-contained apparatus. The typing unit 16, which carries the ribbon feed and reverse mechanisms and also the tape feed mechanism is, by means of dowels 17 which fit into drilled holes in the main frame 11, det-achably mountable on frame 11 so that it may be readily interchangeable, if desired, with a typing unit specially designed for projection purposes.

For a detailed description of the specific apparatus herein shown, reference may be had to copending application Serial No. 651,664, filed January 14, 1933 by A. H. Reiber et al. Accordingly, only so much of the apparatus will be described as will be conducive to a ready understanding of the present invention. To shaft 21 of motor 12 is secured a worm pinion 22, which is adapted to mesh with worm gear 23 aflixed to the lower extremity of a vertically disposed main operating shaft 24, which is carried by anti-friction bearings 25 and 26 which, in turn, are mounted in brackets 27 and 28 secured to frame 11. Pinned to shaft 24 immediately above bearing 26 is a sleeve 29 which terminates at its upper end in a flange the upper face of which is provided with teeth which form a part of a toothed or grab clutch 31, the companion teeth of the clutch being formed on the flange of a sleeve member 32. The lower portion of sleeve 29 is threaded to receive a capstan nut 33 and a locknut 34. Immediately above the capstan nut 33 and slidably articulated thereto by means of a pair of diametrically opposed tongue and groove connections is a flange member 35. Between the members 33 and 35 is a helical compression spring 36 which forms part of a friction clutch comprising a drive disc 37 and a pair of friction discs 38 and 39. By means of the compressive action of spring 36 the members 3'7, 38, and 39 are compressed between the flange of sleeve 29 and flange 35. Disc 37 has a lug 41 adapted to cooperate with a slot in the flange on sleeve 32 to effect a driving connection therewith. Sleeve member 32 is also provided with a flange 42 integral to which is a cam portion 43 which coacts with a cam follower roller 44 mounted on a stud shaft 45 secured to the frame of the apparatus. Loosely mounted on shaft 24 and disposed between the sleeve member 32 and the anti-friction bearing 25 is a multicam member 46 which has cam grooves to control the printing, tape feed, ribbon feed and selector bar restoration functions of the apparatus. Member 46 is provided at its lower extremity with a pair of tongues cooperable with corresponding grooves in sleeve member 32 and thus is adapted to rotate therewith. A helical compression spring 4'7 is interposed between the cam member 46 and flange 42 to eifect upon the disengagement of cam portion 43 and roller 44 the engagement of clutch 31.

Shaft 24 is adapted to extend above the bearing 25 and carries thereon a selector cam assembly and related elements and is secured to the inner ring of the bearing 25 by means of a nut 48 and locknut 49. The selector cam member 50 comprises a flanged sleeve member 51 which is loosely mounted on shaft 24, and carried on the sleeve member 51 are a series of cam discs 52 arranged in laminated formation and provided with cam portions 59 (Fig. 5) which are helically disposed so as to effect upon rotation of the selector cam assembly the operation of a series of selector members successively. Sleeve 51 also carries a release cam disc 55 and a drive disc 56. All of these cam discs are held in their predetermined cooperative relation by means of a nut 57 and a locknut 58. Threaded into the upper end of shaft 24 and adapted to rotate therewith is a member 61 which is provided with a. flange 62 which forms part of a friction clutch comprising drive disc 63, discs of friction material 64 and a disc 65 which is operatively connected by means of tongue and groove connections to a capstan nut 66 threaded and locked on the upper end of member 61. Compressed between flange 65 and the flange on nut 66 is a helical compression spring 67 which renders friction clutch 60 effective. Disc 63 and disc 56 are operatively connected to each other by means of a pair of diametrically opposed lugs 68.

Shaft 24 rotates continuously and carries with it sleeve 29 and its associated parts except disc 37 which is held from rotation by the coaction of lug '71 on disc 3'7 and lever arm '72, as indicated in Fig. 5. Also, constantly rotating with shaft 24 is the member 61 and its associated parts except disc member 63 which is held from rotation by a stop gate '73 (Fig. 8). Thus, it is seen that the selector cam member 50 is driven by the shaft 24 through the medium friction clutch 60 which is rendered effective by the pressure of spring 6'7.

Stop gate '73 is mounted upon a pivot stud '74 secured to an adjustable plate '75 (Figs. 3, 6, and '7), and its upper arm is adapted to be engaged by a latch '76. The latch '76 is pivoted in a journal block 77 (Fig. 7), and this journal block is in turn mounted on the adjusting plate '75. Plate '75 may be rotated about a pivot stud '78 by means of a positive orientation control device, shown in Figs. 1 and 6. As shown in Fig. 6, the adjusting plate '75 is provided with a segmental gear portion '79 which is adapted to cooperate with a pinion 81 which is integral with sleeve 82 mounted on a shaft 83 suitably carried by the orientation member 84, which has graduations 85 adapted to cooperate with an indicating arm 86 mounted on pivot '78.

As seen in Fig. 6, both the latch '76 and stop gate '73 are carried on the adjusting plate '75 and are movable therewith. By means of this orientation adjustment the position of arm 8'7 of stop gate '13 may be altered, as will be presently made clear, to obtain the best operating conditions of the selector. Integral with sleeve 82 is a star wheel 88, as shown in Figs. 1 and 6, the sleeve 82 being pinned to the shaft 83 for rotation therewith. Also fixed to an extended portion of shaft 83 is the knurled thumb piece 89 through which the rotation of shaft 83 is effected. Thus, it is manifest that the adjusting plate 75 may be rotated within predetermined limits about its pivot '78 through the cooperation of gear portion '79 and worm 81. Star wheel 88, as indicated in Fig. 6, cooperates with a detent member comprising a spring actuated ball contained in a cap member 93 mounted on the orientation plate 84, through which means the orientation adjustment is maintained.

A spring 94 extending from the gate 73, Fig. 8, to a spring post on plate tends to rotate the gate clockwise, as viewed in Fig. 8, against an eccentric stop member 95. The disc 63 tends to rotate the stop gate 73 in a reverse direction through the coaction of a lug 96 integral with member 63 and arm 8'7 of gate 73, but the latch 76 restrains the gate 73 against actuation by the stop lug 96. The pivot stud 78 and the left end of latch 76, as viewed in Fig. 7, are in alignment with the axis of the shaft 24. A spring 97 compressed between one end of latch 76 and adjusting plate 75 normally holds the-opposite end of the latch in position to engage the upper arm 98 of the stop gate '73. A trip member in the form of a bell crank 99 is pivoted on an adjustable bracket 101 (Fig. 7) mounted on the fixed plate 102 of the orientation device so that the extremity of its horizontal arm may engage one arm of the latch 76 at a point coincident with the coaxial alignment of the shaft 24 and the pivot stud 78.

The depending arm 103 of the bell crank member 99 is adapted to cooperate at its extremity with a selector lever 104 such that when the lever 104 responds to a spacing impulse the bell crank member 99 will be rotated slightly in a counterclockwise direction, as viewed in Fig. 8, to impart in turn clockwise rotation to latch 76 against the action of spring 97 such that the latch 76 is disengaged from the arm 98 of stop gate 73 whereupon gate 73 is free to respond to the push of stop lug 96 and is thereupon rotated slightly in 'a counterclockwise direction against the action of its spring 94, it being remembered that the disc member 63 which carries lug 96 constantly tends to rotate with shaft 24 through the medium of friction clutch 60. After the lug 96 has passed arm 87 the stop gate 73 is free to return to its clockwise position under the influence of spring 94 against stop to be re-engaged by latch 76. Incidentally, latch 76 and stop gate arm 98 are so designed as to limit the counterclockwise rotation of stop gate 73 to insure that arm 98 and latch 76 will always be in proper cooperative relation with each other.

Normally, bell crank member 99 would vibrate in response to the selective vibrations of selector lever 104 and would cause a corresponding rocking of latch 76, but according to the present invention this vibration has been eliminated by providing a flange 105 integral with the drive disc 63 which is adapted to cooperate with a second depending arm 106 adjustably secured to bell crank member 99 through the instrumentality of slot and screw adjustment 100. Thus, as will be clearly apparent hereinafter, the bell crank 99 after responding to the first impulse of the received code combination to release the latch 76 to efiect the rotation of disc 63 will by the cooperation of fiange 105 and arm 106 be held against further action or vibration by selector arm 104 until near the termination of the cyclic movement of disc 63 when latch 76 is again restored to its operative position and lug 96 will again engage arm 87.

Having reference now to Fig. 4, the details of the selector mechanism actuated by the afore mentioned selector cam assembly will be described. The selector cam member 50 is rotated at a speed substantially equivalent or synchronous to the speed of code impulsing, and operating in conjunction therewith is a selector magnet 110 which may be connected either directly or indirectly to the signal line.

Referring to Fig. 3, the selector cam member 50 is shown as cooperating with a group of selector elements 112 and a series of code discs 113, detailed illustration of which is shown in Fig. 4. As previously described, the code discs 113 are arranged in superposed horizontal planes and are mounted for limited rotation on studs 114, and are held in spaced relation by washers 115 mounted on said studs. In the specific embodiment herein described, the code discs are provided with spokes, but may obviously be formed from solid discs if desired.

The transfer mechanism between the six code discs 113 and the selector arm 104, associated with the selector magnet 110, comprises six sets of selector elements, each set comprising a T-lever 116 (Fig. 4) a selector member or interponent 117, detents 118, and bell crank levers 119, each set being composed of fiat material and arranged in superposed relation between guide plates 121 which are mounted on studs 122 and spaced by washers (not shown).

As is commonly known, the peripheries of the code discs are notched so that each permutation of the six discs will result in an alignment of notches to permit the entrance of a selector or drop bar 123 therein. The T-levers 116 are mounted on a common pivot 124, and each one is provided at the extremity of its stem portion with a substantially circular head to fit snugly into a notch in its associated code disc 113 so that the oscillation of a T-lever 116 will effect a corresponding reciprocation of its code disc. Each T-lever 116 is provided in its head portion with a hole substantially larger than a common guide rod or stop post 125 so that the limited movement of the T-lever and code discs may be predetermined. The interponents 117 are provided with circular portions 126, adapted to engage corresponding sockets in their associated bell crank levers 119. Individual springs 127 normally hold the bell crank levers 119 and'interponents 117 in the position shown in Fig. 4 with one or the other of the abutments 128 and 129 in contact with their cooperating abutments 131 and 132 in T-lever 116. Springs 127 are also effective to hold their corresponding bell crank levers 119 in contact with the selector cams 52.

As previously mentioned, the selector cam member 50 is provided with a helically arranged series of cams 59, one for each of the bell crank levers 119, which rotate the bell crank levers 119 (six in the present instance) in succession and thus reciprocate the interponents 117 as the selector cam member 50 is rotated. In addition to the reciprocal movement, the interponents 117 have a lateral swinging movement between detent notches 133 which cooperate with detents 118 which are actuated by their individual springs 134.

The setting of an interponent 117 to its righthand or left-hand position is determined by the position of selector arm or lever 104, which in turn is determined by the nature of the signal impulses, whether marking or spacing, received F by the selector magnet 110. Selector lever 104 terminates in a U-shaped portion 135, having downwardly extending arms 136 and 137 which constitute abutments which cooperate with abutments 138 and 139 of the interponent 117 and function to position the interponent 11'? in either its right-hand or left-hand position, as will presently appear. As previously mentioned, each spring 127 associated with a bell crank lever 119 holds the associated interponent 117 in its forward position and in engagement with its associated T-lever 116, and each code disc 118 thus is held in either one or the other of its two selecting positions according to the position of the associated interponent 117.

As the signal impulses are received, the selector magnet 110, which, in the present embodiment is shown connected directly in the line circuit, responds to only one of the two diflerent electrical conditions comprising the signals, and attracts its armature 141 when a marking impulse is received and releases it again when a spacing impulse is received, while the interponents 117 are reciprocated successively in synchronism with the received signals by the action of selector cams 59 of the cam member 50 upon the bell crank levers 119. The abutments 138 and 139 are thereby brought into cooperative relation with the arms 136 and 137 at the corresponding signal intervals, thereupon setting the interponents 117 in variant combinations. In order to insure the alignment of abutments 136 and 137 in their respective cooperative positions, a limiting stop 142 provided.

Having reference to Figs. 3 and 4, it will be noted that cooperating with the peripheries of code discs 113 are a series of selector or drop bars 123, only one of which is shown in Fig. 3. These bars are circularly arranged about the code discs 113 and are pivotally mounted upon a circular rod 143. The rod 143 is mounted in and the bars 123 are guided by a circular comb member 144. Each of the bars 123 is provided adjacent their pivotal points with a heel portion to which is secured one end of an individual spring 145, the other end of which is secured to a ring 146 attached to the frame of the apparatus. The springs normally tend to rotate their respective bars 123 in a clockwise direction (as viewed in Fig. 3) into engagement with the code discs 113. Each of the bars 123 is provided with an arm 147 which cooperates with a selector bar restoring member 148. The member 148 is held normally in its upward position, and thus through arms 147 maintain the bars 123. out of engagement with the code oars 113. Member 148 is connected to a lever 149, pivoted at 151 to an adjustable member 152 which is slidably mounted on a bracket 153. E'he opposite end of lever 149 is provided with a 01- lower roller adapted to coact with one of the cam grooves in cam member 46. Thus, upon the cyclic operation of cam member 46, positive reciprocal movement in a vertical direction is imparted to member 148. Member 148 is slidably mounted on a turret member 154 mounted on a base 155 and concentrically positioned with relation to the code discs 113.

Also slidably operable in the turret member 154 is the reduced lower end of a plunger 1156, the

upper end of which is guided in a block 157 mounted on a plate r58 and is disposed in coaxial alignment with turret member 154. Carried by the upper end of plunger 156 is a circular striker member 159 which is provided on its upper surface and along its circumference with a continuous V-shaped notch or groove, and interposed between striker member 159 and an upward extension on bars 123 is an actuating or push bar 161, there being one push bar 161 individual to each selector bar 123. The upper end of push bar 161 is provided with a rack meshed with a segmental gear portion of a type bar 162 associated therewith. Type bars 162 are pivetally mounted on a circular rod 163 carried in a circular comb member 164. Bars 161 are guided by comb members 165 and 166 and are each provided with a spring 167 adapted to impart simultaneously thereto a downward and leftward movement (as viewed in Fig. 3). Each push bar 161 is provided with a notched portion adapted to engage with the V- shaped notch along the peripheral edge of the striker disc 159 when urged thereto by its associated selector bar 123. V Downward movement is imparted to plunger 156 by a lever 168, pivotally mounted on bracket 112, one end of which operates in a groove in plunger 156, the other end of the lever 168 being provided with a follower roller which operates in a cam groove in the cam member 46. Upward movement is imparted to plunger 156 by a actuated lever 169 which is pivoted to a bracket 171 secured to plate 158. One end of lever 169 is adapted to operate on a shoulder in plunger 156 and the other end cooperates with a printing spring 172. The lower end of spring 172 is attached to one end of an adjusting lever 173, the other end of the lever 173 cooperating with an adjusting screw 174 (Figs. 1 and 3), which makes possible the variation of the printing blow.

Referring to Figs. 1 to 4, a description of the mechanism so far described will now be given. As previously mentioned, the normal stop condition of the line is marking, and hence the selector magnet 110 is normally energized due to which condition the selector arm 104 is held in its counterclockwise or attracted position, as viewed in Fig. 4. During the first line impulse or start interval which is of spacing nature, the selector magnet 110 is deenergized and the movement of the selector lever 104 will cause the bell crank 99 to rotate the latch 76 a slight amount to disengage said iatch from arm 98 of stop gate 73 which is thereupon rotated in a counterclockwise direction, as viewed in Fig. 8, against the action of spring 94 by the pressure of the lug 96 against the arm 87. The cycle of operation of the selector cam assembly 50 thus is initiated, and as soon as the stop lug 96 passes the end of arm 87 of the gate 73, the gate will be rotated clockwise by its spring 94 against stop 95. A further oscillation of the bell crank 99 is prevented during the ensuing cycle of operation by the coaction of flange 105 and depending arm 166. Likewise, latch 76 is maintained in its disengaged position until at the termination of the cycle of operation, latch 76 will again resume its operative position to engage the stop gate arm 98. The parts are so constructed that the selector cam assembly 50 is stopped positively by the gate 73 at the end of each cycle and is readily released in response to the start impulse by the movement of the selector lever 104. In this manner the apparatus of the present invention is adapted to operate on the start-stop principle.

Assuming that the first impulse after the starting impulse is of marking nature, the armature 141 and associated selector lever 104 will be held in their counterclockwise positions (shown in Fig. 4). While the selector lever 104 is in this position, a locking lever 175 operates to lock it in such position, as clearly set forth in U. S. Patent No. 1,783,382, issued December 2, 1930 to H. L. Krum, until the first cam of the helical series of cams 59 on the selector cam member 50 has actuated its associated bell crank lever 119 in a counterclockwise direction to move the first interponent 117 to its marking position. This movement of interponent 117 to its marking position, shown in Fig. 4, is effected when said interpcnent is caused to rotate about its ball portion 12.6 due to the coaction of abutments 136 and 138 and the downward pull exerted on ball portion 126 by the bell crank 119. Interponent 117, when subsequently actuated in a reverse direction by spring 127 through bell crank 119, rocks, through the cooperation of abutments 129 and 132, the associated T-lever 116 to its counterclockwise position, to urge in turn its associated code disc 113 to its corresponding clockwise position.

Had the first impulse condition after starting been of spacing nature, the armature 141 and selector lever 104 would not have been held by the selector magnet 110, but instead, the lever 104 would have assumed its clockwise position, in which event the opposite abutments to those previously mentioned would have cooperated to move the associated code disc 113 to its counterclockwise position. As indicated in Fig. 5, the selector lever 104 is resiliently or elastically articulated to the armature 141 by suitable spring means, the purpose of which, as set forth in U. S. Patent No. 1,937,376, is to effect in cooperation with locking lever 175 an intervallic overlap of the signal impulses constituting a signal code combination.

The operation of the selector mechanism pursuant to the reception of each of the succeeding impulses, including the stop impulse condition of marking nature, is similar to that just described.

, At the conclusion of each of the said cyclical operations of the selector cam member 50, an alignment of notches occurs in the code discs to permit the selection of one of the drop bars 123 to actuate thereby one of the push bars 161 into cooperative relation with striker disc 159, which, when operated, imparts an upward movement to bar 161 to cause its associated type bar 162 to be rotated about rod 163 to effect printing.

In operation an overlap is provided between the selecting operation and the printing operation, the cam 46 being initiated into operation substantially at the termination of the selecting cycle so that the printing of a previously selected character may be effected while a succeeding character is being selected. To effect this overlap the mechanism shown in Figs. 4 and 5 is employed. The selector cam assembly 50 is also provided with a release cam (Fig. 5) which coacts with a release lever 187 pivotally mounted on a shaft 188 carried in the frame of the machine. Lever 187 is provided at one extremity thereof with a cam follower 190 adapted to coact with cam 55. The other arm is provided with a pair of shoulders 189 and 191 to cooperate with arm 192 of a release bail 193 carried on a vertically disposed shaft 194 suitably mounted in the frame of the apparatus.

Lever 187 is held in cooperative engagement with arm 192 by a spring 195 such that when the end of arm 192 engages the notch 189 the cam follower 190 is presented in the circumferential path of the release cam 55 so that at a predetermined instant cam 55 coacts with follower 190 to impart a limited counterclockwise movement (as viewed in Fig. 5) to lever 187 sufficient to disengage arm 192 from shoulder 189. Bail'193 thus is free to move in a clockwise direction under the influence of spring 196 through the instrumentality of a bell crank lever 197 which is also pivotally mounted on shaft 194 and is adjustably secured by slot-and-screw adjustment 198 to bail 193. The clockwise rotation of'bail 193 is limited or stopped by the shoulder 191, but is suflicient to disengage arm 72 of bail 193 from stop lug 71 of disc 37.

As previously described in connection with Fig. 3, it has been seen that disc 37 is frictionally connected to main shaft 24 and rotates therewith upon removal of the restraining action of arm 72 (Fig. 5). It has also been noted that disc 37 is provided with a driving connection with sleeve 32 through the laterally disposed lug 41 such that sleeve 32 rotates together with disc 37. Cam member 46 is also provided with a driving connection with' sleeve 32 as previously described. After the disc 37, upon disengagement of arm 72 from lug 71, has rotated a few degrees through the medium of its frictional connection with shaft 24, the corresponding rotation of sleeve 32 has caused the cam projection 43 to ride off of the follower roller 44 which is mounted on the fixed shaft 45. Sleeve 32 thus is free to move downwardly under the action of spring 47 to effect the engagement of toothed clutch 31. By this means a positive drive connection between shaft 24 and cam 46 is effected during the working period of the cycle of operation of cam 46.

As the stop lug 71 continues in its rotation it cooperates with a cam surface 199 provided on one arm of hell crank 197, the effect of which is to impart counterclockwise rotation to the release bail 193 to effect the reengagement of arm 192 and shoulder 189. Arm 72 thus is again presented into the path of stop lug 71 to effect the arrest of disc 37 at the completion of a single rotation of said disc. Near the completion of the rotation of disc 37 the cam follower 43 again coacts with follower roller 44 to effect the disengagement of the toothed clutch 31. The remaining movement of the disc 37 to its stop position marked by the engagement of lug 71 and arm 72 is effected by the aforementioned frictional connection of disc 37 with shaft 24.

Thus, it is seen that substantially a complete overlap between the selecting operation and the printing and functional operations is provided. The cam 46 and levers 149 and 168 (Fig. 3) cooperate to effect these operations. Cam 46 after the initiation of its rotation effects first'the counterclockwise movement of lever 149 (as viewed in Fig. 3) to impart to member 148 downward movement whereupon all of the selector bars 123 are free to respond to the action of their individual springs 145 to be rotated about the pivot rod 143 into engagement with the code discs 113. As already disclosed, the operation of the selector mechanism has effected an alignment of notches in the code discs 113, thus permitting one of the selector bars 123 to enter therein and in consequence thereof the selected bar 123 is permitted to rotate about rod 143 somewhat farther than its companion bars 123, the effect of which is to move its associated push bar 161 into cooperative relation with the striker member 159 through its notch 200. At the proper time in the cycle of operations the lever 168 is rotated in a clockwise direction to permit plunger 156 to respond to the action of printer spring 172 through the instrumentality of lever 169. Plunger 156 and its associated striker disc 159 thus have a sharp upward movement imparted thereto, which movement is imparted through selecthe rack and pinion connection between said push bar and said type bar. Immediately following the release of the plunger 156 to perform the printing operation, the selector bars 123 are restored to their released or unactuated position out of engagement with code discs 113. This restoration is effected by imparting a clockwise movement to lever 149 to raise in turn the restoration member 148 to its upward position, which member coacts with arms 147 of selector bars 123 to rotate said bars 123 against the action of their springs 145. Sincethe cam 46 is required to overcome the pull of approximately sixty-four springs 145, the fulcrum 151 of lever 149 is so selected as to produce a mechanical advantage of about three to one. Adjustment 152 is provided to control the clearance between bars 123 and code discs 113. Immediately following the retraction of bars 123 from the code discs 113, the reselection of code discs 113 in accordance with the ensuing received code combination may be effected. The plunger 156 is finally returned to its lowermost position by the cam 46 by imparting counterclockwise rotation to lever 168 whereupon clockwise rotation is imparted to lever 169 to store up energy in the printing spring 172 for a subsequent printing operation.

The reciprocation of the plunger 156 also functions to operate the tape feed mechanism, a feature of which is its separation from and independence of the platen. Having reference to Fig. 3 and more particularly to Fig. 9, it is observed that the upper extremity of the plunger 156 cooperates with an arm 202 of a tape feed lever 203 pivotally mounted on a shaft 204 appropriately carried in the frame of the apparatus. To the extremity of arm 205 of lever 203 is pivotally carried a pawl 206 which coacts with a feed-ratchet 207 which in the present embodiment of the invention is formed integral with a feed roller 208 (Fig. 2) which is provided with a pair of trunnions by means of which it is rotatably mounted in brackets provided therefor. The pawl 206 is constantly urged into operative engagement with the ratchet 207 by a spring 209 distended between an arm 211 of pawl 206 and an arm 212 of lever 203. The lever 203 is normally rotated in a clockwise direction (as viewed in Fig. 9) into cooperative engagement with plunger 156 by a spring 213 extending from an arm 214 of lever 203 to a spring post 215. Coacting with ratchet 207 to prevent displacement thereof during the feeding operation is a detent member 216 pivoted on a stud shaft 217 and normally urged into cooperative engagement with ratchet 207 by a spring 218.

A pair of pressure rollers 219 (Figs. 2 and 9) are provided which coact with knurled portions of feed roller 208 to effect the movement of a tape 220 in a well-known manner, the rollers 219 being rotatably carried by a lever 221 pivoted at 222 and spring urged against the feed roller 208 by a spring 223 acting on lever 221.

Pivotally carried on am 202 of lever 203 is a platen rotating lever 226, the extremity of which is provided with a plurality of fine teeth to cooperate with a peripheral series of teeth of equal fineness on a ratchet 227 secured to the platen 201. The platen 201 and ratchet 227 are thus adapted to rotate together on a shaft 228, a spring brake means (not shown, but which may be of any well known construction) being provided to prevent back lash of ratchet 227. The pitch of the teeth on lever 226 is slightly different from that on ratchet 227 so as to vary the successive rotational movements of platen 201, whereby the repetition of printing on any particular printing point is not eifected until after several revolutions of the platen. Lever 226 is maintained in operative relation with ratchet 227 by a spring 229 distended between lever 226 and arm 202 in an obvious manner (Fig. 9).

When the plunger 156 is operated upwardly to effect the printing of a character the lever 203 is simultaneously rotated in a counterclockwise direction (as viewed in Fig. 9) such that pawl 206 is lowered to engage the succeeding tooth on ratchet 207 and lever 226 is advanced on ratchet 227 preparatory to effecting the limited rotation of ratchet 227. During this movement ratchet 207 is prevented from back spacing or slipping by means of detent 216 and ratchet 227 is held against reverse movement by its frictional connection to shaft 228. When the plunger 156 is returned to its downward position at the completion of the printing operation, the feed mechanism operating spring 213 is effective to impart clockwise rotation to lever 203 to actuate pawl 206 to rotate ratchet 207, and hence feed roller 208, one step, and also to impart through lever 226 rotation to platen 201. It is therefore apparent that as the tape is fed step-by-step through the printing zone by the tape feed mechanism the platen 201 is simultaneously rotated to present for each printing blow of the type bars a different printing surface thereon, thus the same particular printing surface is presented to the printing point a minimum number of times.

The tape may be supplied from a source located either interiorly or exteriorly of the printing apparatus, but in either event the tape is directed preferably through a conduit 231 from right to left, as viewed in Fig. 3, such that the tape is directed in a line tangent to or slightly below the periphery of the platen 201 so as to insure continuous contact therewith, thence over the platen to the feed roller 208. As the tape passes through the printing zone and its surfaces come in contact with the platen, inking ribbon, type faces, conduit 231 and tape guide 232 (Fig. 2), a considerable amount of tape or paper dust is formed, which consists of the loose particles on the tape and scrapings of the somewhat rough surfaces of the tape. The amount of tape dust formed is very considerable when the apparatus is operated at the very high speeds of which it is capable, and to permit this dust to fall into the mechanism and mix with the lubricating oil the efiects therefrom are very deleterious; so, to preclude this event, the present invention contemplates the provision of a dust receiver 233, as illustrated in Figs. 2 and 3, of such conformation as to effectually collect the tape dust as well as prevent its admission into the mechanism located therebelow.

This invention also provides, as viewed in Fig. 2, a pair of angularly disposed ribbon reels or spools 234 and 235 which are arranged such that the inking ribbon 236 is directed transversely of the tape 220 at the printing point, the effect of which is to permit practically immediate presentation of the printed record to the view of the observer. In the present structure the ribbon 236 is by means of a specially constructed ribbon guide 237, substantially as shown in Fig. 2, adapted to cross upon itself obliquely and thence extend transversely across the tape, the guide 237 being secured by screws 238 to the main frame of the printer, clearance holes for the screws being provided in the tape guide 232. A feature of the present structure resides in the provision of centralizing means to guide the tape through the ribbon guide 237, whereby arm 240 of guide 237 is provided on the edge cooperating with the ribbon with a curved contour, the effect of which is to maintain the ribbon centralized with respect to the arm 240 and thereby prevent the edges of the ribbon from becoming ravelled or frayed, which would occur if the ribbon were permitted to rub against the end of the slot formed by the elbow of arm 240.

In Fig. 10 is illustrated a portion of so-called ticker tape printed with the apparatus according to the present invention. As is commonly known, the printing or recording is done in offset lines to facilitate the reading of the stock quotations, the stock or item comprising the letters characters being recorded in the upper line and the price or quotation comprising the "figures characters being recorded in the lower line. In the present apparatus the oifset printing is effected entirely without the use of a shift mechanism, the position of the typeface on the type bar being the sole means of determining the line in which printing is to take place.

The principles and desirable features here described are likewise applicable to a wide range of selecting mechanisms and telegraphically controlled and operated devices, and although the present invention has been disclosed and described with reference to preferred embodiments it is, of course, understood that the invention is capable of embodiment in many and widely varied form's other than that specifically disposed without departing from the spirit and scope of the present invention, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. 7

What is claimed is:

1. In a recorder, a plurality of recording elements, a platen, means to move a tape over said platen upon each recording operation by said elements to effect character spacing, and ribbon feed mechanism disposed entirely on one side of said platenincluding a single stationary means for directing the ribbon transversely of the tape at the recording area to render the record visible following each recording operation.

2. In a printing telegraph machine, a plurality of type-bars, a plurality of actuating bars connected to said type-bars, a selecting mechanism controlling said actuating bars, an operating means for said actuating bars to effect the operation of the type-bars, a platen, means to move a tape over said platen upon each printing operation to effect character spacing, and ribbon feed mechanism disposed entirely on one side of said platen including asingle stationary means for directing the ribbon transversely of the tape at the printing point to render the printed record visible following each effectiveness of said operating means.

3. In a .recorder, a plurality of recording elements, a selecting mechanism responsive to current impulses'for controlling the effectiveness of said elements, an operating means for said elements, a platen, means to move a tape over said platen upon each recording operation to eflect character spacing, and ribbon feed mechanism disposed entirely on one side of said platen including a single stationary means for directing the ribbon transversely of the tape at the recording area to render the record visible following each effectiveness of said operating means.

4. In a recorder, a plurality of vertical typebars movable in printing toward a common center in planes which all intersect on a common axis, a platen, means independent of the platen to move a tape over said platen for each printing operation to effect character spacing, and a ribbon feed mechanism disposed entirely on one side of said platen including a single stationary means for directing the ribbon transversely of the tape at the printing point to render the printed record visible following each printing operation.

5. In a telegraph receiver, a selecting mechanism responsive to received code combinations of electrical impulses comprising a set of selectors, an electromagnet, an armature lever therefor, and a cyclically operable cam member cooperating with said armature lever to set said selectors in different combinations, a motor actuated friction clutch for rotating said cam member, a stop element for arresting said cam member, a latch for holding said element in operative position, a pivoted trip lever actuated by said armature lever to operate said latch to initiate the cyclic movement of said cam member, and positive means to limit the coaction of said armature lever and said trip lever.

6. In a telegraph receiver, a plurality of recording elements, a selector mechanism responsive to code combinations of impulses to select one of said elements for operation, said mechanism comprising a cam drum subjected to a constant torque and operated in synchronism with the speed of code impulsing, means for arresting said drum, means for holding said means in operative position, means actuated by an element in said selector mechanism to operate said second recited means, and positive means to limit the coaction of said element and said last recited means.

7. In a telegraph apparatus, a selector mechanism responsive to code signals comprising a cyclically operable member. a constantly rotating shaft, a pair of members operable under different operating conditions, a dual functionary element carried on said shaft to operate said pair of members simultaneously, a friction clutch operatively associated continuously with said element during its complete cycle of operation, a grab clutch operatively associated periodically with said elements, means controlled by said cyclically operable member to permit through the instrumentality of said friction clutch the initiation of operation of said element, and means to render said grab clutch effective only during an intermediate period of the cycle of operation of said element.

8. In a telegraph apparatus, a selector mechanism responsive to code signals comprising a cyclically operable member, a constantly rotating shaft, a pair of members operable under different operating conditions, a dual functionary element carried on said shaft to operate said pair of members simultaneously, a friction clutch operatively associated continuously with said element during its complete cycle of operation, a grab clutch operatively associated periodically with said element, means comprising a combination latch and stop means controlled by said cyclically operable member to permit through the instrumentality of said friction clutch the initiation of operation of said element, means to render said grab clutch effective only during an intermediate period of the cycle of operation of said element. and means cooperative with said latch meansjand eflective during the cycle of operation to limit the operativeness of said clutch means to ajsingle cycle.

9. In a printing device, printing mechanism comprising a platen operable in the direction of tours to maintain the ribbon centralized in its path across the tape.

In sprinting device, printing mechanism comprising, a platen operable in the direction of movement of the printed record, and a ribbonfeed mechanism comprising means for directing o iement of the printed record, and ribbon seed 'the ribbontransversely of the platen to render mechanism comprising a pair of angularly disposed ribbon carriers and a single stationary means cooperative therewith for directing the ribbon transversely of the platen to render *the printed record visible following each effectiveness of said printing mechanism. i

10. In a printing device, printing mechanism including a platen operable in the direction of movement of the printed record, and ribbon feed mechanism comprising a single stationary ribbon directing means adapted to? cause the ribbon to cross upon itself obliquely and then transversely of the platen to render the printed record visible following each efi 'ectiveness of said printing mechanism. 5

11. In a printing device,'printing mechanism including a platenf operable in the direction of movement of the printed record, and ribbon feed mechanism comprising a single stationary ribbon directing means adapted to cause the ribbon to cross upon itself obliquely and then transversely cf the platen to render the printed record visible follewing each effectiveness of said printing mechanism, said ribbon directing means comprising means for centralizing the movement of the ribbon across the platen.

12. In a device, printing mechanism including a platen operable in the direction of movement of; the printed record, a pair of angularly; disposed ribbon carriers arranged on one side of the platen and cooperatively related to said mechanism, and a ribbon feed mechanism comprising a 7 single stationary ribbon directing means adapted to cooperate with said ribbon carriers to, cause the ribbon therefrom to Esross upon itself obliquely prior to crossing salt; platen transversely to render the printed record visible following each effectiveness said printing mechanism.

13. In a recorder, a platen, printing mechanism including a tape feeding means and a ribbon feeding means for roving a tape and an inking ribbon, respectively; adjacent said platen, operating mechanism cooperative with" said printing mechanism to effect printing operations, and detachable means in juxtaposition to said platen and disposed below the tape and said ribbon feeding mans to intercept the particles producei by thencoaction of the printing elements during the printing operation.

14. In printing device. printing mechanism including? a. platen operable in the direction of movement of the printed record, a pair of angularly disposed ribbon carriers arranged on one side of a platen; and cooperatively related to said mechanismfand a ribbon-feed mechanism comprising a ribbon guide cooperating with said mechanism to cause the ribbon to cross upon itself obliquely and then transversely across the tape, said ribbon" guide provided Filth curved conthe printed record visible following each effectiveness of said printing mechanism, said means provided with a pair of curved contours to maintain the ribbon centralized in its path across the tape. 5

16. In a telegraph apparatus, a member for controlling selective operations, an armature controlled by successive received signals, spring means tensioned by said armature and acting to urge said member: to change position, cyclically operable cam means rendering said member operable repeatedly in said spring means selectively at each instant of beginning of a plurality of signal time intervais, a latch operable by" said armature in response to a received signal te'start said cam means,-and positive means to limit the coaction of said armature and said latch.

17. In a telegraph apparatus, an armature controlled received signals, a member for controlling selective operations elastically articifiated tosaid armature, cyclically operable cam means cooperable with said member to control selective operations, latch means operable by said member in response to a received signal to start said cam means, and positive means to limit the coaction of said member; and said latch means, 7;

18. In a telegraph apparatus, mechanism controlled by received signals comprising cyclically operable cam means to control selective operations, latch means operable by said mechanism in response to a received signal to start said cam means, and positive means to limit the coaction of 'said selector mechanism and said latch means. i

19. Inc. telegraph apparatus, mechanism controlled by received signais comprising cyclically operable means to control selective operations, an element opemble bysaid mechanism in response to a received signal to start said 'means, and means for rendering said element non-responsive to a predetermined number of subsequent signals.

20. In a telegraph apparatus, a selector mechanism responsive to code signals comprising a; cyclically operable member, a pair of members: operable under different operating conditions, a; dual functionary element to operate said pair; of members simultaneously, a friction clutch op-

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