US929984A - Machine-telegraph. - Google Patents

Description

G. C. READ. MAGHINE TELEGRAPH.

APPLIGATION FILED MAR. 21, 190B.

929,984. Patented Aug. 3,1909.

W/T/VESS 'S` VENTOH J any ead l ATTORNEYS G.. G. READ.

MACHINE TELEGRAPH.

APPLIOATION'HLBD MAR, 21, 1908.

929,984. Ptencea Aug. s, 1909 ATTO/WE Ys G. G. READ. MACHINE TELEGRPH.

APPLIUATION FILED MAR. 21, 190s.

Patented Aug. 3, 1909.

5 SHEETS-SHEET 3.

N VEN TOR @ug C-ecz y w/rA/Essfs I A TTOHNEYS umm. nlv mmm co.. m01

G. C. READ.

MACHINE T ELEGRAPH. APPLIOATION HLBD MAB. 21, 1908.

929,984. Patented Aug. 3, .1909.

7417021 mt' bf! iff www@ s 33 C( C/ S f6 @I 12,61 I@ @Huf l gym A ,6.7366262 ATTORNEYS nouw aum an" 7mm, wmamofcm c.

G. C. READ.

MACHINE TELEGRAPH. y APPLICATION FILED 111111.21, 190s.

Patented Aug. 3, 1909.

5 SHEETS-fSHEET 5.

A TTOHNE YS GUY OARLETON READ, OF DAVENPORT ,STATION, TORONTO, ONTARIO, CANADA.

MACHINE-TELEGRAPH.

Specification of Letters Patent.

Patented aug. 3, 1909.

Application filed March 21, 1908. Serial No. 422,409.

To all whom t may concern:

Be it known that I, GUY CARLETON READ, a subject of the King of Great Britain, and a resident of Davenport Stat-ion, Toronto, in

- the Province of Ontario and Dominion of i graphs, my more particular object being to provide a receiver system including mechanism whereby currents sent over an electric line and made up of dots and dashes, are caused to operate the keys and analogous i parts of a typewriter, so as to print the letters corresponding` to the telegraphic characters.

In pursuance of this object, my invention further relates to means whereby a number of separate circuits, cach controlling one of the keys of the typewriter, are energized in succession by selective mechanism operated electrically from av distance, and energized by currents, the duration of which corresponds to dots and dashes.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar' characters of reference indicate corresponding parts in all the figures.

Figure 1 is a horizontal section upon the line 1-1 of Fig. 2, looking in the direction of the arrows and showing a number of contact bars journaled upon appropriate supports and adapted to be moved downwardly one at a time, so as to close different electric circuits controllable thereby and leading to the typewriter keys, this view further showing four jointed rods and mechanism for actuating the same, for the purpose of enabling the current impulse representing dots' and dashes to act selectively as between the various contact bars; Fig. 2 is a side elevation of the mechanism appearing in Fig. 1, and shows how various of the jointed rods are pulled endwise one at a time for the purpose of controlling the clown-strokes; Fig. 3 is an end elevation showing the mechanism as seen from the right of Fig. 2, this view further showing the relative arrangement of certain magnets employed and mechanism operated and controllable by these magnets; Fig. 4 is a fragmentary section through a sliding contact employed for the purpose of opening and closing one of the circuits; Fig. 5 is a fragmentary section through another sliding Contact, and a rocking contact arm for engaging the same; Fig. 6 is a fragmentary section through the sliding contact shown in Fig. 5, the section being taken upon a plane at right angles to the section through Fig. 5; Fig. 7 is a fragmentary plan view of three of the jointed rods and the cylinder for moving the same endwise, this view showing the position of the parts when the letter E is being recorded by the machine; Fig. 8 is a view similar to Fig. 7, but showing the condition of the jointed rods while the letter A is being made; Fig. 9 is a view somewhat similar to Fig. 7 but showing the relative positions occupied by the jointed rods when the letter B is being made; Fig. 10 is a diagram showing the general wiring of the system, the various contacts and batteries and many of the movable mechanical parts associated with or controllable bythe various electric circuits.

A supporting framework contains posts 11, 12, 13, 14, 15, 16, and is used for housing and sustaining many of the movable parts. Journaled upon the posts 11, 1G is a roller 17 driven by a pulley 18, the latter being` engaged by a belt 19 and driven continuously thereby in the direction indicated by the arrow in Fig. 2. A subframe 20 (see Fig. 2) contains a magnet 21 provided with an armature 22, the latter being supported by an armature lever 23. Connected with this lever is a retracting spring 24. Contact screws 25, 2G are mounted upon opposite sides of the armature lever 23. An adjusting screw 27 is connected with the spring 24 for the purpose of regulating at will the tension of the same. The contact lever 23 normally rests against the contact screw 25, this taking place when the line is open and inactive. The Contact lever 23 is also brought into frequent engagement with the contact screw 25 during the formation of the letters and this contact controls a circuit having a very peculiar purpose, as hereinafter described. The framework further comprises various bars 27 a, 2S, 29, 30, 31, all Ymounted rigidly in position. Four flat rods 32, 33, 34, (see Fig. 1) of slightly different shape are provided. The bar 35 is connected by a screw 36 with the cross rod 30. Four other bars 37, 38, 39, 40, shorter than the bars 32, 33, 34, 35, are disposed in alinement with the bars just mentioned. A pivot pin 41 connects together the bars 37, 32, making a composite member which I designate as a jointed rod. The bar 38 is connected by a pivot pin 42 with a head 43, the latter being slidable in relation to the bar 33 and provided with a slot 44. A pin 45 rigidly mounted upon the bar 33 extends through the slot 44. By this arrangement the bar 33 may be moved in the general direction of its length a little distance without disturbing the bar 33. This is because the head 43, owing to the slot 44, may be moved a little distance before the end of the slot lodges against the pin 45.

A spring 46 connects together the bar 38 and the pin 45, and serves to keep the head 43 and bar 38 normally in the position indicated in Fig. 1. The bar 39 is connected by a pivot pin 47 with the bar 34. The bar 33 is provided with a boss 38EL (see Fig. 1) projecting' laterally therefrom, and the bar 34 is provided with a boss 34a likewise projecting laterally from it, the boss 342L lying Within the path of travel of the boss 33, and so arranged that when the bar 33 is drawn endwise a suiiicient distance, its boss engages the boss 34@l and causes the rod 34 to move endwise, carrying with it, o'f course, the bar 39.

The bar 40 is connected by a pivot pin 4S with a head 49, which head is provided with a slot 50 through which extends a pin 51 mounted rigidly upon the bar 35, and a spring 52 yconnects together the bar 40 and the pin 51. The bar 35 being stationary, owing to the screw 36, the tension of the spring 52 normally holds the bars 40, 35 in the relative position indicated in Fig. 1.

Mounted upon a cross bar 56 are three leaf springs 53, 54, 55, which normally tend to press downwardly upon the bars 32, 33, 34, so as to hold the same in fixed position. Spiral springs 57, 53, 59 are connected respectively with the bars 32, 33, 34, and4 tend to retract these bars when displaced endwise, as will be understood from Figs. 1, 2 and 10. Connected with the leaf springs at 60a are wires 60 (see Fig. 3), which are secured to an armature 61. A magnet 62 is disposed just above this armature, and is adapted to lift the same so as to disengage the springs 53, 54 and 55 from the rods upon which they normally press. The armature 61 is mounted upon an armature-lever 63, the latter being supported by a pivot-'pin 64. This armature lever is provided with a contact-plate 65, which is adapted to engage a contact-screw 66, the engagement occurring whenever the magnet 62 is denergized.

A slideway 67 (see Fig. is mounted upon a bracket 68 supported by the framework. Mounted within this slide-way 67 is a contact-slide 69,- having an enlarged portion 69a disposed within the slideway (see Figs. 2 and 4). Contact- pins 70, 71, insulated from each other, are mounted upon the bar 32, and normally the pin 70 is in engage- 'to bring` theni to the nient with the contact-slide 69. Whenever the bar 32 is drawn forward, how-ever, contact is broken between the contact-slide 69 and pin 70, and the pinV 71 moves into engagenient with the contact-slide (Si).

Mounted upon the heed 49 and projecting downwardly therefrom is a contact-piu 72'. A contact-boss e is mounted upon the crossrod 27, and so disposed as to be engaged by the contact-pin 72 whenever the head 49 and rod 40 are carried endwise to the left, according to Fig. 2. lVires 74, 75, .76 are connected with the bars 37, 33, 39, and are adapted to draw the saine downwardly so as level of the upper sur- ' llhe wires 74, 75, 76

face* of the roller 17. are secured at their upper ends to links o (see Fig. 1) for the purpose of preventing their withdrawal from the rods 37, 33, 30 and 40. Spiral springs 79 Fig. tend to maintain the rods 37, 33, 39 and 40 in their uppern'iost positions, thus serving as retraeting springs. A wire 30 is connected with the rod 40 and provid-ed at its lower end with an armature 81, and below this armature is a magnet- 82. A magnet 33 is disposed below the armature i i' and is adapted, when energized, to draw the saine dowu wa rdl y.

.fr number of magnets 34 are connected in series and are each provided with an armature 35, each armature being mounted upon a wire 36. rilhe various wires 36 hang from bars S7, S3, 39, 90, 01, and are adapted to be drawn downwardly one at a time. A rod 92 is mounted in brackets 93, and the various bars S7, 38, 89, 90, are journaled upon it. Mounted upon euch of the bars 87, 38,' 39, 90, 91 is a link 94, and connected with these links are springs 95, shown in Figs. 2, 3 and 10. The purpose of the springs is to normally maintain in uppermost position the bars to which they are attached. Each bar 37, 38, 89, 90, 91 is provided at its free end with a contact-plate 96 or 96a, which is rigid upon the bar. The number ot these bars is commensurate with the number of typewriter keys to be actuated. lisposed below each plate 96 or 961 is a contact-spring 97 or 97a, and below this spring' is a contact-plate or Normally the contacts just mentioned are all separate. l

Disposed below each bar 37, 33, 39, 90, 91 is a rocker-arm 99, and connected with the latter is a spiral spring 100 tor retracting the same, erch rocke "-arin being .iounted upon a rod 101. Extending downwardly from this rod is an arm 102, the lower end of which is provided with a block 103 of insulating` material, and disposed below the arm 102 is a slideway 104, provided with a groove 105. M ovably mounted within this groove are plates 106, provided with a portion 107 projecting therefrom, this plate and its projecting portion together constituting a contact-slide'. Contact- pins 108, 109 are mounted within the plates 106 and disposed one upon each side of the arm 102.

The arrangement is such that when the r'o'd 101 turns, the lower end of the arm 102 moves the contact-slide and makes or breaks communication with the contact-pin 108, according to' the direction in which the rod 101 is turned. Because of the rocking movement peculiar to the rod l101, 1 designate the latter as rocking shaft. The pin 109 being insulated, no circuit is completed when it is engaged by the contact slide.

lires are shown at 110, 111. These may be considered either as line wiresl or as the wires of a local circuit. Either of these wires may be grounded, if desired. A wire 112 (see left of Fig. 10) connects the contact screw 26 with the magnet 83, connected by wires 113, 114, with a stationary battery 115, and from the latter a wire 116 extends to the armature lever 23. Connected with the contact screw 25 is a. wire 117, and this wire is connected by a wire 118 with the plate 69 of the contact slide 69. The contact pin 71 is connected by a wire 119 with the contact screw 6G, and a wire 120 is connected with the armature lever 63 and also with the magnet 82. A wire 121 connects the magnet 82 with the wires 113, 114. Y

A battery 122 (see upper portion of Fig. 10) is connected by a wire 123 with the wires 117, 118, and a wire 124 is connected with the contact pin 70. Connected with the magnet. 62 are wires 125, 126, and a wire 127 is connected with the battery 122.

A battery 128 (see middle portion of Fig. 10) is connected by a wire 129 with the contact pin 72. A wire 130 leads from the contact point 73 to all of the magnets 84, which are connected in series with each other by wires 131. A wire 132 leads from the last of these magnets to the battery 128.

A battery 133 (right hand of Fig. 10) is connected by a wire 134 with the wire 125. A wire 135 joins the wire 126 and leads downwardly to the rocking shaft 101, and a wire 136 leads from the contact pin 108 to the battery 133.

A wire 138 leads from the contact plate 96 to the magnet 1421, and this wire is provided with a coiled or flexible portion 1382 to permit movement of the rod 87. From the contact springs 97, 97a, wires 139, 140 lead upwardly and are joined together and with a wire 147. From the contact spring 97a al wire 141 leads to a battery 137, and thence wires 144, 144el lead to a magnet 142, which controls a typewriter key 1422. I do not wish to be understood, in using the expression typewriter-key, to imply merely the kind of key which necessarily makes aletter or figure. The key in question may be considered as the shifting key or as the key operating the space-bar, and

the construction and use of such parts being old, I do not deem it necessary to describe them in detail. Suflice it to say that it is common in the art to operate almost any movable part of a typewriter by aid of a key, and that the two keys shown are representative of any and all keys with which a typewriter may be provided for any purpose whatsoever.

From the magnet 142 a wire 143 leads to the contact plate 96a'. From a battery 145 (see upper right-hand corner of F 10) a wire 146 leads to the contact-plate 98.

Connected with the wires 139, 140, is a wire 147 which joins with the wire 124. Connected with these wires is a wire 148 which joins with the wires 125, 134. A wire 149 connects the wires 126, 135 with the wires 127 and 150g. A wire 150 connects together the contact-plate 98a and the wire 146. A wire 150a connects the battery 145 with the wire 127. A magnet 142b is connected by a wire 151 with wires 144, 14492 The magnet- 142J controls a typewriter key 142C. The rod 32 (see Figs. 7, 8, 9) is pro vided with holes 154, 155, 156. Similarly trie rod 33 is provided with holes 157, 158, 159, and the rod likewise provided with holes 160, 161, 162. There may be any number of these holes in each of the rods men. tioned and the distribution of the holes is somewhat arbitrary.

Each rod 87, 88, 89,90, 91 is provided upon its under surface with pins 163, 164., as indicated in Fig. 10. The number and arrangement of these pins, like that of the holes in bars 32, 33, 34, is somewhat arbitrary. I purpose having the holes in the bars 32, 33 and 34 and the pins in the bars 87, 88, 89, 90 and 91, so arranged that, by bringing about predetermined movements of the bars 32, 33 and 34, certain pins are l brought into register with certain holes, soj

that when all of the bars 87, 88, 89, 90 and 91 are drawn downwardly by the action fof the magnets 84, only one bar will be in proper position to make its descent, the others being held up by the pins. .li propose further to control the positions of the bars 32, 33, 34, from moment to moment, by electric signals flashed over the w're as above indicated.

' 1t will be noted that the bar 39 is shorter than the other bars 37, 38, 40, and consequently is not so easily brought into engagement with the roller 17. Then the magnet 83 is energized, allthree of the bars 37 38,

descend, the bars 37, 38 engaging the upper surface of the roller, but the bar 39 being shorter than the others failing to engage the roller immediately. 1f, now, it should happen that the bar is advanced, that is moved to the left according to Fig. 1, the lug 3821 engages the boss 34a and the bars 34 and 39 are thus advanced to such a point rbar 39.

that the roller 17 may be engaged by the The bar e0, when it descends, is brought into engagement with the roller 17, but this bar never descends except when the magnet 82 is energized. Hence, there is a certain intel-dependency between the bars 37, 258, 89, the bar -1-0 being comparatively independent.

The operation oit' my device is as follows: We will suppose that the various springs have been adjusted, and that the roller 17 is in motion. The apparat-us above described being located the receiving station, is ready tor tne reception oit messages. Suppose, now, that the line wires 110, 111 (see lett-hautl portion ot Fig. are energized for an instant only, so as to represent the sending ot' a dot ot the lforse or continental alphabet. This dot, we will say, would mean the letter l. The magnet 21 is energized tor au instant only, and attracts the armature and causes the armature lever 23 to move out of engagement with the contact screw 25 and into engagement with the contact screw rhe energizing ot magnet 21, as above described, causes a circuit to be completed, as follows: battery 115, wire 116, armature lever 23, Contact screw 2G, wire 112, magnet S3, wire 113, wire 11st, back to battery 115. The circuit last traced energizes, tor an instant. only, the n agnet 8?) and causes the bars 37, to be drawn downwardly, the bars 37, 38 alone being' brought into engagement with the roller 17. New, as the duration ot the circuit through the magnet 83 is very short, owing` to the tact that only a single dot is made, the bars 37, 88 press, tor a very short instant only, upon the roller 17. Both ot' the b= rs last mentioned are therefore drawn the bar 39 not moving'. Since the piY-Jot pin 4?.-1, connecting together the bar 87 and the bar admits oi no play between these parts, the bar 82 is advanced a little distance representing' the duration ot' the current representing the dot. T he bar 33 does not move Jforward, however, because ot its connection with tte bar 38 through the medium ot the slot 4:4-, the pin and the head a3. rThe instant the current stops flowing (or in other words, as soon as the dot is inished) the spring L18 rctracts the bar 3S and head lf3 to their normal position. Now, since the bar 32 alone is 'n'ovided with contact pins 70, 71, and since this bar moves 'forward a distance representing one dot, the following circuit normally closed is opened: battery 122, wire 123, wire 113, contact plates G9a, 69, contact pin 70, wires 1211, 11i-8, 125, magnet 62, wires 126, 149 and 127, back to battery 122. This circuit being thus broken deenergizes the magnet The armature (31 now drops and the three springs 53, 511, being thus released, grip tightly upon the bars 82, 33 and 34. The movement of the bar 8210 the lett, according to Fig. 1, as above described, brings the contact pm 71 into engagement with the contact plate 69.

This happens at the same instant when, owing to the dropping of the armature 61, the armature lever 68 is moved and the contact plate 65 brought into engagement with the contact screw 66. The following circuit is thus completed: battery 115, wire 116, contact lever 23 (now retracted to normal position, see 10), contact screw 25, wire 117, wire 118, contact plates 69a, 69, contact pin 71, wire 119, Contact screw 66, contact plate G5, wire 120, magnet 82, wire 121, wire 1H, back to battery 115.

Let us suppose, now, that the bars 87, 88 and 89 represent respectively the letters E, fr and B. Such being the case, it is necessary that after the electric impulse representing the dot is sent over the line, the apparatus shall be brought into such condition that the bar 87 alone is tree to move downward. This is done by so arranging the hole 154 in the bar 32 that, when the bar 32 moves the distance representing one dot, the hole 154E is brought into registry with the pin 165, and as the other bars 33, 34 have not moved, and the bar 35 is always stationary, it necessarily follows that the bar 87 is the only one capable of descending. N ow, it will be noted that one ot the circuits above traced is closed by the retraction of the armature lever 23 against the contact screw 25. The duration of the closure ot this circuit is a matter oit' some inniortance tor the reason that it determines whether the machine is to make the letter l or some other letter, say one beginningl with a dot. 1t, after the iirst dot is made, there is a pause sutlicient to represent the interval between telegraphic letters, the circuit through magnet 82 and contact screw 25 remains completed for a corresponding period, and consequently the armature S1 and wire 80 cause the bar 10 to not only engage the roller 17, but to remain in contact with it tor an appreciable period. This being done, the contact pin 72 (see Fig. 10) moves into engagement with the' contact point 73. lt should be noted, however, that in order to close the contact just mentioned, it is necessary for the bar 40 to have time to travel a proper distance. Hence, it atter making the dot there is not a sutiicient pause betere the next dot or other character, the contact-pin 72 is not brought into engagement with the contact point 73. The contact-pin 72 may start toward the contactpoint 73, but unless the interval after the torniation ot the dot or other character be sufficient to bring it into engagement with the contact-point. 7 3, the spring 52 restores the bar 40 and head r9 to their normal positions, as soon as the magnet 82 is denergized. 1t, however, the period elapsing after the making of the dot or other characeze-,984

ter be sufficient, or in other words, if the `operator has completed the letter and purposely paused, so that the contact-pin 72 is brought into engagement with the contactpoint 73, the following circuit is completed: battery 128, wire 129, contact-pin 72, contact-point 73, wire 130, magnets 84 connected by wires 131, 132, back to battery 128. This energizes all of the magnets 84 and pulls upon all of the armatures 85. Since, however, the bar 87 is the only one capable of making` a descent, as above explained, this bar alone moves downward. The other bars 88, 89, 90, 91 are held up by the pins under them which do not register with the holes in the bars 33, 34. The bar 87, being brought downward, the following circuit is completed: battery 137, wires 141, 140 and 139, contact spring 97, contact plate 96, wires 138a and 138, magnet 1421), wires 151 and 144 back to battery 137. This energizes the magnet 142b and pulls down the typewriter key 142C. The bar 87 has sut'icient movenient, however, after making engagement be tween the Contact plate 96 and the contact spring 97, to carry the spring last mentioned into engagement with the contact point 98. This closes another circuit as follows: battery 145, wire 146, Contact point 98, contact spring 97, wire 139, wires 147, 148, 125, magnet 62, wires 126, 149 and 150, back to battery 145. This energizes the magnet 62 and causes it to attractthe armature 61, thus raising the three leaf springs 53, 54, 55 from the bars 32, 33, 34, and thereby enabling the har 32 (which happens to be the only one displaced) to return to its normal position. if, in making some other letter, it should happen that either or all of the hars 32, 33, 34 are displaced, the iaisingl of the springs $33, 35 will necessarily liberate them and enable them to return to normal position. The descent of the bar 87, however, does more that has already been described. Tt depresses the arm 99 (see Fig. 3) and in so doingturns the rocking shaft 101 a slight distance. In doing this, the arm 102 (see Figs. 5 and 6) is turned slightly so as to engage the pin 109 which is insulated, and thus move the slide 106 (see Fig. to the left.

1Now, when the bar 87 rises, after the completion of its stroke, the rocking shaft 101 turns slightly in a contraclockwise direction, according to Fig. the arm 102 being thus brought into direct metallic engagement vith the contact pin 108` and moving the slide 101'3 to the right, according to Fig. 5, until the block 103 of insulating material engages the pin 108. it will thus be seen that for a moment, while this is taking place, the arm 102 is in direct metallic Contact with the pin 108, and that immediately afterward it is insulated from this pin. Such being the case, a circuit is made and immediately thereafter broken. This circuit is as yfol-lows: battery 133, wire 134, wire 125, magnet 62, wire 126, wire 135, rock ing shaft 101, arm 102, contact pin 108 and wire 136, back to battery This energizes the magnet 62, thus raising the armature 61 and springs 53 so as to allow the bar 32 (or if other bars are displaced, to retract them all) to normal position. This last movement.might seem to be superfluous because ordinarily the bar 32, or 'any other bar which happens to be displaced, will be restored to normal position, as above described. Tf, however, it should happen that the bar 32 should be displaced considerably, for instance after transmission 'of the letter P or the figure 6, consisting entirely of dots, a little time interval is required for the bar to get back to its normal position, and the circuit last traced is for the purpose of insuring that the springs 53, 54, 55 will be raised for an adequate length of time to enable the bar 32, or any of the other bars, to get back to normal position.

The ascent of the bar 87 opens the circuits which were closed by its descent, and the several magnets affected thereby are denergized. This leaves the apparatus in position for making another letter.

Suppose, now, that the letter A. is made. This letter consists of a dot and a dash. The line being energized accordingly, the magnet 21 gives one pull of proper duration and another pull of longer duration. Vfis-above explained, so long as nothing but dots be made, the bar 32 is the only one which can move. A dash being made, however, the bar 33 mores the full length of a dash and in so doing, the lug 38a engages the lug 34a and pulls up the bar 34 so that the bar 39 is brought into engagement with the roller. d fter this takes place, either dots or dashes will move the bar The magnet 21 being energized, as stated, the circuit through magnet 83 is closed, quickly opened, andv closed again for a little longer period. The 110 bars 37, 38, 39 are drawn down accordingly. The bar 32 moves forward a distance representing a dot and a dash. The bar 38 moves forward a distance representing a dash. This heilig done, it follows that the bars 32 and present, relatively to the pins projecting downwardly from the bars 87, 88', a diiferent group of holes in alinement with these pins. The arrangen'ient of the mechanism is such that when the bars are brought into the position just described, the holes and pins will so register that the bar 88 alone is free to descend. The other bars 87, 89, 90, 91, all being supported by the pins project.- ing downwardly from them. The bar 88, therefore, instead of the bar 87, now descends. This completes a circuit through the magnet 142 and draws down the typewriter key 142% All of the circuits affected are analogous to those above traced in relation imi to the descent-,of the bar 87 in making the' letter E. Since the typewriter key 14?l represents the letter A, that is the letter now made by the typewriter.

l Suppose, neXt, that the letter B comes over the line. rIhis letter consists of a dash followed quickly by three dots. In this instance (see F ig'. 1) the bar 37 moves forward the distance represented by a dash and The bar 38 moves a distance represented by one dash only. Since, however, the lug 38a engages the lug Bta and pulls on the bar 34, this bar moves a distance represented by three dots. Here, then,

5 we have still a third combination of holes and pins, and owing to the prearrangement of the same, the bar 89 alone is capable of making its descent. This bar, in its descent and subsequent ascent, completes a number of other circuits analogous to those above described with reference to the magnets 1&2, llQb, and thus causes a third letter to be made upon the typewriter, the letter in this instance being B.

As above indicated, the spacing, shifting and other movements peculiar to the typewriter, being capable of execution by means of keys, are performed through the action of magnets analogous to 142 and 1423, so that the entire work of the typewriter is controlled by the distant telegraph operator.

An important function is performed by the bars 40, 35, and the magnet 82 and its armature. It is true that these parts do not directly control the formation of letters bv selecting which bar 87, 88, 89, 90, 91 shall make its descent. The oliice of the bar Ll0 and magnet 82 controlling it, is to enable the machine to distinguish between letters,

or parts of letters, in which the time interval between the dots or other characters may have a significance. For instance, if two dots be made quickly, they indicate the letter I according to the Morse code. If, however, they be made of equal duration but `spaced farther apart, they mean two Es.

The magnet 82, unlike the magnet S3, is

controlled by the space during which the line is not energized. In other words, the

time intervals between dots or other characters are given a positive effect owing to the fact that they cause the magnet 82 to be energized and the bar Ll0 to be put in motion.

It is largely by means of the bar 410 and magnet 82 that the machine is able to allow the time interval between successive characters to determine what significance shall be given to the characters as affected by the time interval, and consequently to determine automatically and selectively which one of the bars 87, 88, 89, 90, 91, if any of them, shall be depressed.

From the above description it will be noted that signals, such as are made by the Continental code or by the Morse code, when sent over a line, will cause the receiving apparatus at the opposite end of the line to register the characters upon an ordinary typewriter, and thatthis is accomplished by the selectivity of different bars which are depressed one at a time, each bar representing either a letter, or a movement of the spacing key or shifting key of the typewriter.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. In a machine telegraph, the combination of a plurality of typewriter keys, a single line wire, contact bars mounted to move up and down, mechanism controlled by said contact bars for operating said typewriter keys, and mechanism comprising jointed rods having' endwise movement and controlled in their movement by electric dots and dashes passing over said line, the said last mentioned mechanism controlling the movement of said contact bars to cause the typewriter keys to print the letters corresponding to the telegraphic characters.

2. The combination of a plurality of keys for printing intelligible characters, a separate magnet for each key, contact bars controlling said magnets, a telegraph line, and mechanism comprising a plurality of ointed rods having endwise movement and controllable by electric dots and dashes passing over said line, the said mechanism controlling said contact bars for energizing said magnets in a predetermined order of succession.

El. The combination of a revoluble roller adapted to turn continuously, a plurality of bars provided with portions for engaging said roller so as to enable said roller to move said bars endwise, magnets for bringing' said bars into engagement with said roller, means for breaking' engagement between said bars and said roller, nechanism controllable by the relative position of said bars for printing intelligible characters, a telegraphic line, and mechanism energized by currents therefrom for controlling the engagement of said bars with said roller.

4l. In a machine telegraph, the combination with the keys of a typewriter, of a plurality of electric circuits each controlling one of the keys of the typewriter, selective mechanism for energizing' said circuits in succession, and comprising contact bars each controllii'ig' one of said circuits, and sliding bars, the position of which controls the movement of the contact bars, and a telegraph. line connected with said selective mechanism for operating the same from a distance, to control the position of the sliding bars, the said selective mechanism being energized by currents, the duration of which corresponds to dots and dashes.

5. In a machine telegraph, the combinallO tion of a plurality of movable bars, mechanism connected with each of said bars for printing a se )arate intelligible character, a plurality of dliding bars crossing said lirst mentioned bars, the relative position of said sliding bars normally preventing the descent of any of said first mentioned bars, a revoluble roller adapted to be engaged by the sliding bars to move said bars endwise, means for normally holding said bars out of engagement with the roller, and means controlled from an electric line 'for bringing said sliding bars into engagement with said roller, whereby the sliding bars are positioned to permit selective movements, one at a time, of said first mentioned bars.

6. ln a machine telegraph, the combination of a revoluble roller, a plurality ot' bars `disposed adjacent thereto, means controllable from a telegraphic line tor bringing certain of said bars into engagement with said roller for the purpose of actuating said bars, a second bar normally disconnected from said roller, means for enabling one of said first-mentioned bars to move said second-mentioned bar, and mechanism controllable by the relative positions of said bars for printing intelligible characters.

7. In a machine telegraph, the combination of a plurality of circuits for controlling the printing of intelligible characters, a plurality of contacts for opening and closing said circuits, a plurality of pivoted bars for actuating said contacts, a telegraphic line, a revoluble roller, a plurality of bars adapted to be moved endwise by said roller, the position otsaid bars controlling the movements ot' said pivoted bars, and mechanism energized by currents from the line for controlling the engagement of said endwise movable bars with said roller.

8. The combination ot a plurality of typewriter keys, a separate magnet tor each key, a telegraph line, a device adapted to be moved continuously, mechanism movable by the said device, the said mechanism being normally held out ot' engagement with said device and having movable parts adapted to be brought into engagement with said device, the mechanism being controlled by electric dots and dashes passing over said line -for energizing said magnets in a )redetermined order of succession.

9. In a machine telegraph, the combination with a plurality of hinged contact bars adapted to be moved downwardly one at a time, a series of electric circuits, each controlled by one of said contact bars, a plurality of typewriter keys each operated by one ot' said circuits, a telegraph line, a revoluble roller adapted to turn continuously, and a plurality of jointed bars adapted to be actuated from the said roller and controllable from the line to enable the current l impulse representing dots and dashes tol act selectively between the various contact bars.

l0. ln a machine telegraph, the combination of a plurality of bars mounted to move up and down, mechanism' connected with each ot" said bars tor operating a typewriter key when the bar is depressed, a plurality ot sliding bars extending at right angles to said tlrst mentioned bars, a telegraph line, means controllable from the telegraph line for moving said bars endwise to position the saine, to permit a time, ot' said first mentioned bars, mechanism tor enabling the relative position of said sliding bars to normally prevent the descent ot' all ot said lirst mentioned bars, springs adapted to press on the sliding bars 'tor holding` said bars in fixed position when moved endwise, means for moving said springs to release said sliding bars, and means for returning said bars to normal position when released.

ll. The combination of a revoluble roller, a plurality of jointed bars adapted to engage said roller so as to be moved endwise thereby, springs tor holding said bars normally out of engagement withfsaid roller, magnets for bringing said bars into engage` ment with said roller, a telegraph line, mechanism energized by currents from the line 'for controlling the engagement of said bars with said roller, bars mounted to swing, and mechanism connected with said swinging bars for actuating typewriter keys, the said swinging bars being controlled in their movements by the relative position ot` said i'irst mentioned bars.

l2. The combination of a plurality of typewriter keys, a series ot electric circuits each controlling one of said keys, a telegraphic line, a series of contact bars adapted when moved downwardly, one at a time, to close each a dilierent electric circuit, each contact bar being provided with pins on its y under surface, a series of bars mounted to move endwise and each provided witha plurality of holes, and mechanism controllable from the line for moving` said bars to bring certain of said holes into registry with certain of said pins to permit the current impulse to act selectively between the said contact bars.

13. ln a machine telegraph, the combination of a plurality ot' circuits for controlling the printing of intelligible.characters, a plurality of contacts tor opening and closing said circuits, a plurality of pivoted bars for actuatingl said contacts, each bar being provided with pins on its under surface, a plurality of sliding bars arranged at right A angles to the iirst mentioned bars and adapted to move endwise, each bar being` provided with holes adapted to be engaged by the said pins, the position of said holes relative to the pins controlling the movements ot said selective movements one at bars and controllable by said line for permitting' selective movements, one at a time, of seid bars, means for holding said mechanism when positioned, means tor returning said mechanism to norn'ial position when released trom said holding means, and an electric circuit controlling the said holding 1r the said circuit being closed by the clo`\.-.1i\vard movement said bars.

tion of a revoluble roller adapted to turn continuously, a `plurality ot bars mounted to slide and each having a hinged member adapted to be brought into engagement with :said roller so that the bars may be moved endwise by the roller, means tor bringing said hinged .members ot the bars into engagement with the roller, mechanism controllable by the relative position of said bars for operating typewriter keys, a telegraph line, and mechanism en rgfized by currents therefrom tor controllingv the engagement ot said bars with said roller.

lo. lin a machine telegraph, the combination ot a revoluble roller, a plurality of jointed bars mounted to slide and each havingr one member arranged to move up and down. the said ininibers beingdisposed adjacent to the roller and sundry ot said inembeis having their tree ends arranged to engag the roller when said members are moved downward, one of said bars having its vertically movable member shorter than the members of the other bars,`whereby the said member may move downward without en,r ing the roller, means controllable from a telegraph line for moving said members downward, means tor moving the last mentioned bar endwise trom one of the other bars to cause said bar to engage the roller, a plurality ot typewriter keys, and mechanism controllable by the relative position of said bars for actuating the typewriter keys.

17. The combination oit a plurality of typewriter' keys, magnets for actuating said keys, a single line wire, a rotatable device, mechanism comprising endwise movable bars having pivoted members adapted to engage said rotatable device, whereby the bars are moved endwise, the said mechanism being controlled by electric dots and dashes passing over said line, and means controlled by l5. ln a nnichinel telegraph, the combinathe position oi said mechanism for energizing said magnets in a predetermined order ol succession.

18. The combination of a plurality of typewriter keys, a series of electric circuits each controlling one of said keys, a telegraph line, a series of pivoted contact bars adapted when moved downwardly one at a time, to close each a different electric circuit, a series of bars mounted to move endwise, the position of said bars controlling the movement of the contact bars, each of said endwise movable bars having a pivoted member, means adapted to be engaged by the pivoted members of the bars to move the bars endwise, and mechanism actuated from the line for controlling the engage ment oi the said pivoted members of the bars with said means to permit the current impulses to act selectively between the said contact bars.

19. In a machine telegraph, the combination or" a plurality ot bars mounted to slide and each having a hinged member, a movable device adapted to be engaged by the hinged members to move said bars endwise, a telegraph line, mechanism energized by currents therefrom for controlling the engagement of said bars with said device, and mechanism controllable by the relative position or" said bars for operating typewriter keys,

20. The combination of a revoluble roller, a plurality of jointed rods having members adapted to engage said roller so that the rods may be moved endwise, means controlled by the relative position of said rods tor actuating typewriter keys, a telegraph line, and mechanism energized by currents trom the line for controlliiig the engagement ot said jointed rods with said roller.

21. ln a machine telegraph, the combination with a plurality of typewriter keys, of a series ot' electric circuits each controlling one o the keys of the typewriter, selective mechanism comprising contact bars each controlling one ot said circuits, sliding bars the position of which controls the movement ot the contact bars, and means for moving said sliding bars, and a telegraph line c0nnected with said selective mechanism for operating the same from a distance to controlthe position of the sliding bars, the said selective mechanism being energized by currents the duration of which corresponds t0 dots and dashes.

ln testimony whereof l have signed my name to this specication in the presence of two subscribing witnesses.

GUY CARLETON READ.

Witnesses W. MERsERnAU, H. A. PHILLIPS.

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