US705227A - Printing-telegraph. - Google Patents

Description

Patented July 22, I902.

p4 Sheets-Shed M3 rm T. M. FUOTE.

PRINTING TELEGRAPH.

(Appliation filed Mar. 11, 1901.)

(No Model.)

No. 705,227. Patented July 22, [902. T. M. FOOTE.

PRINTING TELEGRAPH. (Application filed Mar. 11, 1901'.) (No Modal.) l4 Sheets-Sheet 2.

THE uoarus' PETERS on PHOTO-LITNQ. WASNNGTON, n. c.

(No Model.)

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PRINTING TELEGRAPH.

' (Application filed mar. 11, 1901.)

Patented July 22, 1902.

I4 Sheets-Sheet 3.

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N0. 705,22]. Patented July 22, I902.

T. M. FUDTE.

PRINTING TELEGRAPH.

(AppLica-tion filed. 11, 1901. (No Model.) l4 Sheets-Sheet 5.

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No. 705,227. Patented July 22, I902.

- T. M. FOGTE.

PRINTING TELEGRAPH.

(Applicnfion filed Mar. 11, 1901.)

I4 Sheets-Sheet 6,

(No Model.)

YHE MJRRIS PETERS co. PNm'o-umo.wAsumoTom-o, c.

No. 705,227. Patented July 22, 1902.

T. M. FOOTE.

PRINTING TELEGRAPH.

(Application filed Mar. 11, 1901.)

(No Model.) l4 Sheets-Sheet 7.

THE NORRIS PETERS co, PMDYO-LITHO, WASHINGTON, o. c,

Patented July 22, I902."

T. M. FUOTE.

PRINTING TELEGRAPH.

(Application filed Mar. 11, 1901.)

I4 Sheets-Sh? 8.

(No Model.)

No. 705,227. Patented July 22, I902.

T. m. F UOTE.

PRINTING TELEGRAPH.

(Applicqi bion filed Mar. 11, 1901.) (No Model l4 Sheets-Sheet 9.

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No. 705,227. Patented July 22, I902.

T. M. FOOTE.

PRINTING TELEGRAPH.

(Application filed Mar. 11, 1901.) (No Model.) l4 Sheets-Sheet [0.

No. 705,227. Patentd July 22, I902. T. m. FOOTE.

PRINTING TELEGRAPH.

(Application filed Mar. 11, 1901.) (No Model.) l4 Sheets-Sheet ll.

No. 705,227. Patented July 22, I902.

T. M. FUOTE.

PRINTING TELEGRAPH.

(Application filed Mar. 11, 1901.)

' (No Model.) l4 Sheets-Sheet I2.

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(No Model.)

/ I .25 arm 22 Patented IuIy22, I902.

T. M. FOOTE.

PRINTING TELEGRAPH.

(Application filed. Mar. 11, 1901.

I4 Sheets-Sheet I3.

Patented July 22, I902.

l4 Sheets-Sheet M.

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PRINTlNG TELEGRAPH.

(Application filed Mat. 11, 1901.

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N TPED STATES AFNT FFICE.

THEODORE M. FOOTE, BROOKLYN, NEW YORK, ASSIGNOR TO \VESTERN TELEGRAPH TYPEWVRITING MACHINE COMPANY, A CORPORATION OF NEW JERSEY.

PRINTING-TELEGRAPH.

SPECIFICATION forming part of Letters Patent No. 705,227, dated July 22, 1902.

Application filed March 11, 1901. Serial No. 50,648. (No model.)

To aZZ whom, it may concern.-

Be it known that I, THEODORE M. FOOTE, residing at Brooklyn, in the county of Kings and State of New York, have invented a new and useful Improvement in Printing-Telegraphs, of which the following is a description, reference being had to the accompanying drawings, which are a part of this specification.

My invention relates to improvements in machines adapted for-transmitting messages electrically between distant points and for receiving and printing such transmitted messages in words or characters.

The invention includes improved means both for transmitting messages by or through a suitable electric conductor,'as awire, and for receiving such transmitted messages and printing them on paper or suitable material.

The invention consists of the novel machine and apparatus and the parts and combinations thereof, as herein described and claimed, and the equivalents thereof.

In the drawings, Figure l is a top plan view of myimproved machine, the features being shown in a general way, details and small parts being omitted or merelyindicated in outline. Fig. 2 isatop plan view, on larger scale, of my improved machine other than the paper-holder and the keyboard and parts directly connected with the keyboard. Fig. 3 is an elevation of that portion of my improved machine shown in plan in Fig. 2, the view being of that side of the machine which is at the front in Fig. 2. Fig. 4 is an elevation at the left of that portion of the machine shown in plan in Fig. 2, including also the paper-holder and a fragment of the keyboard frame or case and related parts. Fig. 5 is an elevation at the right of Fig. 2, showing substantially the other end of the machine from that shown in Fig. 4. Fig. 6 is an elevation at the right of Fig 2, being a view substantially the same as Fig. 4; but in this view the electromagnets at the front in Fig. 5 are omitted and the mechanism immediately behind the electromagnets' is illustrated instead. Fig. 7 is a vertical section on line 7 7 of Fig. 1 toward the right. Fig. Sis a vertical section on line 7 7 of Fig. 1 toward the left. Fig. 9 is aside view of mechanism shown at the right and near the front in Fig. 2 and is chiefly mechanism employed in and about the feed of the paper and the shifting of the type-wheel. Fig. 10 is a section on line 10 10 of Fig. 9. Fig. 11 is a View of the construction on the other side of the mechanism shown in Fig. 9 and of related parts. Fig. 12 is a view of a device shown at the right and in front on Fig. 2 employed in the control of the motor electric circuit and in the shifting of the typewheel. Figs. 13, 14-, 15, and 16 are details of the device or mechanism shown combined in Fig. 12. Fig. 17is a horizontal section looking downwardly from just below the papersupporting table, Figs. 7 and S, the electric motor being omitted from the view. Figs. 18 and 19 are details of an electric switchlocated adjacent to and operated by the device of Fig. 12 for opening and closing the motorcircuit. Fig. 20 shows, partly in section, a connecting or binding device (seen in Fig. 4) for connecting the electric wires leading from the keyboard to the insulating-disk. Fig. 21 is a detail, partly in section, of a device employed in the motor electric circuit for maintaining the circuit under conditions that would otherwise break the circuit. The device is employed in connection with a governor on the motor-shaft for breaking the motor electric circuit. Fig. 22 is a side view of the insulating-disk with some related mechanism. Fig. 23 is a central section of the insulating-disk shown in Fig. 22 .and of related mechanism. Fig. 24: is a view of the reverse side of the insulating disk shown in Fig. 22. Fig. 25 isa transverse section of the insu1ating-disk on lines of separation ofparts, as indicated at 25 25 on Fig. 23. Fig. 26 shows a fragment of the insulating; disk and partly devices employed inclosing the electric circuit to the electric ring set in the insulating-disk and a unison device. Fig. 27 shows a segmental rack secured to and adapted for the adjustment of the insulating-disk. Fig. 28 is a detail of the brush circuit-closer that sweeps the periphery of the insulating-disk, including the electric contact-pieces and electric ring mounted therein, with the means by which the brush is supported. Fig. 29 is a detail of a circuit-closing device mounted on the insulating-disk.

The relation of this device to the disk is shown in Figs. 4 and 22. In some of the drawings the insulating material is shown light, because the amount thereof being great if shown in black or even in heavy shade-lines the drawings would be too black for clear illustration or for suitable reproduction as required by the Patent Office. Fig. 30 is a view of the under side of the keyboard and related parts. Fig. 31 is adetail of the combinationswitch employed with the electric wires of the keyboard, the frame of the keyboard being in section. Fig. 32 is a transverse section of the keyboard and its frame, showing also details of the keys and circuit-closers and coupling-up devices. Fig. 33 is a detail of a device for obviating the improper turning of the keys, and Fig. 3-1 is a diagram of the electric system employed with and forming a part of my invention.

The construction and operation of my improved machine are such that one machine may be located at one station on an electric line or telegraph wire and another machine or machines may be located at another or other stations on the line distant from the first station, and each machine is adapted for transmitting a message electrically over the line to the other station or stations, to be there received and printed by the duplicate machine. In use the several machines on the line are so connected up tothe line electrically as to be in position for receiving and printing a message, and any one desiring to send a message over the line by means of these instruments has merely to shift a switch at the transmitting-station, putting the machine at that station in condition for transmitting a message, and thereupon by successively depressing the keys representing the characters desired to be transmitted to and printed at the distance station substantially in the manner of depressing keys on type-writing or similar machines puts the machine at the transmitting-station and the one at the receiving-station into operation and transmits the message to the receiving-station, which is there printed on paper or other suitable material without the presence of any person at the receiving-station. On finishing the transmission of the message the switch is again shifted, putting the machine at the transmitting-station into condition for receiving a message, so that, as before, all the machines on the line are normally in condi tion for receiving a message.

Referring now to the electric system forming a part of myinvention and shown in diagram in Fig. 34, A represents the transmitting-circuit, which leads from the ground through a battery W to the line-wire, the line being shown as closed and the direction of the circuit through the machine being indicated by arrows with single barbs.

B indicates a shunt or branch of circuit A employed in receiving messages, the direcferred for convenience.

tion of the circuit through this shunt being indicated by arrows with a feather.

C indicates'the printing-circuit, which is auxiliary to the circuit A and is employed for actuating the printing devices. It is connected to the circuit A through binding-posts M and N.

O is a shunt of circuit C.

D is the type-wheel-shifting circuit. This also is connected to the circuit A through the binding-posts M and N.

E is a paper-feed circuit connected to the circuit A through binding-posts M and N.

F is a shunt or branch circuit of the paperfeed circuit E.

F is a second shunt of the circuit E.

G indicates the synchronizing-circuit, connected to the circuit A through the bindingposts N and P.

H indicates the motor-circuit and is connected to the circuit A through the binding posts M and N.

K is a shunt-circuit of the motor-circuit H.

R is a binding-post shown on the machine, but not necessarily required, being convenient for use in case of emergency in place of or for similar use as post P, M, or N.

The several electric circuits as thus described include therein operative parts of the machine, which will be described in detail hereinafter.

In the drawings, 1 is a base on which the principal members of the machine, and especially all those parts of the machine that relate to receiving a message and printing it,-

are supported.

2 is the keyboard, which is provided with a suitable frame or base 3 and is represented as located adjacent to the base 1, the construction being such that the keyboard, including its frame, can readily be separated from the principal machine and its base. This construction, by which the keyboard is made detachable from the principal machine, is not a necessary construction, but is pre- The keyboard is, however, to be considered as an essential portion of the machine as a whole. The keyboard is provided with any desired number of keys 4, representing advisably the several letters of the alphabet,the numerals,and such other characters as are most usually employed in printing, though the keys may, if preferred, be made to represent stenographic or other characters.

In the drawings, Fig. 1, the letters or characters represented by the keys there shown are for convenience placed on the fingerpieces of the keys. The keys are advisably mounted to move endwise in the keyboard, as shown in Fig. 32, being in such form held in their initial positions by means of springs 5. The stems of the keys are of metal suitably insulated, preferably, in and by their mountings, which may consist of the hard-rubber keyboard 2 and plates 6 and 7, secured to the frame. The keys are prevented from rotation in their bearings by insulated plates 32, secured to the frame 3, which platesare provided with recesses forming furcate ends that straddle and bear against flattened sides of the stems of the keys, and thus prevent them from turning in their bearings. Each keyis adapted when depressed .to contact as a plug with a metal electric terminal 8 and with an adjacent metal electric terminal 9, formin g an electric contact and circuit closer from one terminal to the other. Each of these ter- I .minals 9, preferably of copper, Figs. 30, 32,

is connected electrically to a wire 10, leading to a metal coupling-pin 11, the wires and pins forminga part of the electric circuit A. These wires and-pins are mounted on the keyboard- .frame 3, the pins being adapted to enter detachably and to contact electrically with socketed terminals 12, Figs. 1, 3, 8, fixed in the base 1. The wires 10, the pins 11, and the terminals 12 are suitably insulated in their supports. The pins 11 are preferably split at their free ends, and the furcate parts are sprung apart slightly, whereby they are adapted when inserted in the terminals 12 to insure electric contact therewith. In the drawings, Fig. 30, a few of the terminals 9 are shown as connected by wires 10 to the pins 11, the wires for the remaining terminals being omitted to avoid confusion in illustration. The pins 11 and the socketed terminals 12 are the means provided for making detachable electric connections between the keyboard devices and those on the base 1 and are employed for this purpose with all the electric connections between these two parts of the machine.

Each of the metal terminals 8, Figs. 30, 32, is in contact electrically with one or the other of the metal (copper) strips 13, which are sey 17 are employed in receiving messages.

cured to the frame 3 of the keyboard and are connected together electrically by a metal strip 14, forming a common electric conductor. The strips 13 and 14 are insulated on the frame 3, conveniently by being secured to the insulating-plate 7. This common conductor is connected electrically by a wire 15 to a metal electric-circuit closer 16, fixed on an insulating-block 17, which block is secured to the frame Another metal electrio-circuit closer 18, also secured to the block -17, projects in a reverse direction therefrom.

This circuit-closer 18 is connected electrically by a wire 19 to a pin 11, the circuitcloser, the wire, and pin forming a partof electric circuit A, leading to the battery and ground.

Thecircuit- closers 16 and 18, Figs. 30, 31, 34, are employed actively in sending messages. Two other metal electric- circuit closers 21 and 22, both mounted on the block The circuit-closer 22 is also connected electrically to the wire 19, and therefore is preferably made integral with the circuit-closer 18. The circuit-closer 21 is connected electrically to the wire 23, leading to a pin 11, which enters a socketed terminal 12, connected to a wire leading into the circuit A, the circuit-closer 21, the wires, the pin, and the socketed terminal forming a part of the e1ectrio circuit B. Another'metal electric'circuit closer 25, also mounted on the block 17, is connected by a wire 26 to the circuit-closer 21. This circuit-closer 25 and its connections are a part of an electric starting-circuit hereinafter to be described.

The combination electric switch for opening and closing circuits to which the electriccircuit closers 16, 18, 21, 22, and 25 belong includes also the metal strips or electric terminals 27 and 28, respectively mounted in blocks 29 and 30 of insulating .material, which blocks are mounted on a rod 31, slidable endwise in and through the keyboardframe .3. This rod is preferably provided with terminal finger-knobs.

The electric- circuit closers 21 and 22 are so disposed as to contact electrically concurrently with the terminals 27 and 28, and the circuit- closers 16 and 18 contact concurrently with the terminals 27 and 28, but not synchronously with the contact of the circuitclosers 21 and 22 with the same terminals. The circuit-closer 25 contacts with terminal 28 for an instant during the shifting of the switch from its position for receiving a mes sage (the position shown in Fig. 30) to the position for sending a message, Fig. 34, the contact occurring just previous to the circuitcloser 16 being brought into electric contact with the terminal 28. These electric terminals 27 and 28 are connected to and form a part of the circuit A, being immediately connected thereto by local wires 20 and 24, leading to coupling-pins 11, all forming a part of the circuit A.

The several socketed terminals 12, Figs. 3, 8, that are connected electrically through pins 11 and their connections to the character-keys on the keyboard, are also connected electrically to local wires 33, forming a part of the circuit A, which wires lead to metal segmental contact-pieces 34, Figs. 2, 3, 4, 8, 22, 24, disposed in radial series in a disk 35, composed of insulating material. A plurality of series of contact-pieces about the disk are preferably employed, thereby per-.

provide for readily removing the operative mechanism from the base 1, the wires 33, that are connected to the terminals 1.2 on the under side of the base, are run to .a binding- ICC IIO

. 41, turning thro ugh the plate 39, contact electrically with the springs 38, and other portions of these wires 33 lead from the screws 41 direct to the contact-pieces 34, thus securing continuous electrical connection from the terminals 12 to the contact-pieces 34.

The disk 35 is for convenience preferably made in two parts, Fig. 23, and is fixed on a sleeve 42, revolublyloose on a tubular shaftbox 43, fixed in the frame 44. The frame is of suitable form and material and is secured detachably on the base 1. The sleeve 42 is provided with a radial arm 45, Figs. 4, 23, 27, having a terminal segmental rack 46, which is engaged by a screw 47, rotatable in a bearing 48 therefor fixed on the frame. By this construction the disk can be adjusted revolubly to proper position to related mechanism.

The contact-pieces 34 are advisably arranged in'two series peripherally on and about the disk 35, the pieces being preferably in angular form to fit to the outer edges of the disk, and the outer ends of the pieces are curved, conforming to the curvature of the disk. The contact-pieces are let into the disk and are separated and thereby insulated from each other by'the material of the disk. There must be as many contact-pieces as there are character-keys, and as some letters are used more frequently than others in printing the words of a message it is advisable to have a larger number of contact-pieces than there are keys. When a greater number of contact-pieces are employed, as shown in the drawings, than there are keys, two or more contact-pieces, preferably at a distance apart, are connected up electrically to one key, and this is best done by connecting two or more contact-pieces 35 together by an electric wire 49, as illustrated in Fig. 24. The resuit of this is that the brush (hereinafter described) will close an electric circuit for such key through one or the other of such connected contact-pieces without passing entirely around the disk. The contact-pieces 34 on one side of the disk are connected to electric wires 33 or 49 by binding-screws 50, andthe contact-pieces on the other side of the disk are connected to similar wires by pins 51, extending through the disk. The disk 35 also carries a metal contact-ring 52, which is conveniently located and insulated in the material of the disk between the two series of the contact-pieces 34. The periphery of this ring is broken as an electric conductor at one point by the insertion therein, transversely thereof, of a block of insulating material 53. The ring 52 is connected electrically by a wire 54 to a metal brush 55, contacting with a divided metal band 56 on a wheel 57, of insulating material, tight 011 shaft 58, mounted in box 43; Another metal electric brush 59, contacting with band 56, is connected electrically by a wire 60, that leads to and forms a part of the electric circuit A. For convenience of construction the Wire 60 is run back through the disk 35 and thence through the binding- plates 39 and 36 to the type-wheel-controlling electromagnet, hereinafter described. The brushes 55 and 59 are mounted on an insulating-block 61, Figs. 22, 23, 29, which block is secured to the disk 35. One of these brushes, 59, is preferably made in two parts overlapping each other and adjustable longitudinally, whereby the extent of the breakin the electric circuit by the interterminal insulation in band 56 can be extended or minimized. The insulation in band 56 is disposed coactingly with unison-terminals in the disk 35.

For closing the electric circuit between. the several contact-pieces 34 and the ring 52 on the disk 35 a metal brush 62, Figs. 1, 2, 3, 4, 8, 22, 28, is employed, which brush has fingers arranged as the brush is revolved about the disk to contact severally with the contactpieces 34, and another finger that contacts substantially continuously with the ring 52. The brush 62 is mounted on an arm 63 by an insulating connection, the arm 63 being secured to and projecting radially from shaft 58, Figs. 22, 23, 28. Farther along in the electric circuit A there is an electromagnet 63, Figs. 1, 2, 5, 6, 34. The armature 64, actuated by this electromagnet, is mounted on a lever 65, pivoted medially on the frame 44. The lever 65 carries a thereto-pivoted pawl 66, adapted when the armature is drawn to the electromagnet closing the electric circuit to engage a ratchet-wheel 67, tight on shaft 58, whereby the rotation of the shaft and the type-wheel 68, splined thereon, is temporarily prevented while the type-wheel is employed from time to time in printing a character on paper, as hereinafter described. For convenience this ratchet-wheel 67 may be designated the type-controlling ratchetwheel. An adjustable screw 69, turning in the frame, is adapted as a stop to limit the movement of the lever 65. The lever 65 is provided with a spring 70, adapted to hold the armature 64 yieldingly normally out of contact with the electromagnet 63.

The type-wheel 68, Figs. 1, 2, 3, 5, 6, 7, splined on shaft 58, is provided on its periphery with letters, numerals, characters, and spaces corresponding in number with the contact-pieces 34 on disk 35. These letters, numerals, characters, and spaces on the typewheel correspond in number and are Value with the teeth on the ratchet-Wheel 67.

For rotating the shaft and type-wheel a worm-wheel 71, fixed on the shaft,meshes with a worm 72 on a vertical shaft 73, footed and journaled in the frame. A worm-wheel 74, loose on shaft 7 3, is held thereto frictionally and so as to be capable of yielding rotatably thereon under excess of strain by bearing at I the ball-governor under too-rapid rotation of one side against a collar 75, fixed on the shaft, and by being held thereto by a spring 76, coiled about the shaft and bearing against the Worm-wheel, the spring resisting against a collar 77, adjustable on the shaft. The wormwheel 74 mesheswith a worm 78, fixed on the shaft 79 of an electric motor 80. The motor is of a form in common use and is in the electric circuit II.

' The electric circuit II, in which the motor 80 is located, is provided with a controllerswitch consisting of an insulating swinging switch-arm 81 and a series of button-terminals 82, connected up by resistance-coils 83, Figs. 2, 3, 4, 7, 34, the arm being adapted to be put into electric contact with any one of the button-terminals for closing the circuit and regulating the current or to be swung free from the terminals breaking the circuit. A controller'switch in the shunt K of the motor-circuit II consists of the extension of the arm 81 in the opposite direction and button terminals 84:, connected up by resistance-coils 85, the relative arrangement of the button-terminals and the resistance-coils and their connections in the circuits H and K being such that when the switch is closed the resistance in each circuit will be correspondingly great or small. It will be seen that by the construction just described both the circuit H and the shunt-circuit K are closed by the same switch-arm 81, and this is the normal condition for driving the motor 80; but as the motor might be driven at too high a speed by the electric current through both these circuits, if uncontrolled, I provide an automatic cutout switch or exothactic switch in the shuntcircuit K. In this automatic cut-out I em ploy a ball-governor comprising balls 84 at the joints of spring-extended toggle-arms 85, the toggle-arms being pivoted at their inner ends to a collar fixed on the motor-shaft 79 and at their outer ends to a collar 86, Figs. 2, 21, slidable on the motor-shaft. Ametal disk 87 is fixed and insulated on the collar 86 and serves as the circuit-closer between the metal brush- terminals 88 and 89, Fig. 4, in shuntcircuit K. The brush 89 is spring-mounted on base 1 and contacts constantly with the revolving disk 87. The brush 88 is secured to an elastic metal finger 90, mounted by insulating connection on aspring-arm 91, fixed The in a post 92, Figs. 4:, 21, on the base 1. brush 88 contacts normally electrically with disk 87. The free extremity of the spring-arm 91 bears against the end of the motor-shaft 79 and follows that shaft in such end wise vibrations or end play as is common in motor-shafts, the result being to maintain the brush S8 in constant position relative to the motor-shaft. A stop for the brush 88 consists of a finger 93, secured insulatingly to the spring-arm 91, the free end of which finger is disposed to engage the brush 88 and hold it back from contact with the disk 87 when that disk is withdrawn from the shaft. The finger 93 is provided with a set-screw 94, having a tip of insulating material which bears against the arm 91, and is adapted for adjusting the finger 93, so as to limit the movement of the brush 88 toward the disk 87, and thereby determine the point at which the brush shall break contact with the disk as the disk retreats from the end of the motor-shaft under the action of the governor. The result is to control the speed of the motor.

In electric circuit II, I also provide a cutout or exothactic switch 95, Figs. 6, 18, 34, which is operated automatically by mechanism also employed for controlling the typewheel-shifting circuit D. In this mechanism a connecting-rod 96 rides on an eccentric on type-wheel shaft 58 and is pivoted to a block 97, adjustable in a swinging arm 98, Figs. 6, 12, 13, 14, 15, which arm is pivoted on a hub 99, mounted oscillat-ingly on an axle-pin 100, rigid in frame 4 The pin is provided with a terminal hub'retaining nut. The adjustment of the block 97 in arm 98 determines the extent of the throw of the arm, causing the pawl 103 to pass one or more teeth on the ratchet wheel 102 at each oscillation. A spring 101, coiled about the pin and secured to the frame and to the hub, is adapted to hold the hub in an initial position revolubly and to return it when rotated from its initial position, as hereinafterdescribed. A ratchetwheel 102 is fixed on the hub99,andaspringactuated click-pawl 103, pivoted on arm 98, engages the teeth of wheel 102. The reciprocation of the rod 96 oscillates arm 98 and through pawl 103 rotates the ratchet-wheel 102 intermittingly. A back stop for the ratchet-wheel is hereinafter described. A pin 101 on wheel 102 is adapted by the oscillation of wheel 102 to engage a swinging lever 105. The lever 105 is pivoted medially on studpin 106, fixed in frame 14. A switch-arm 107 is pivoted on pin 106, and one arm of the lever 105 bears normally againsta pin 108 in the switch-arm 107, the lever 105*bearing oppositely against a spring 109, mounted on arm 107. The switch-arm 107 is provided with a metal insulated band 110, which when in the position shown in Fig. 6 contacts electrically with the electric terminals 111 and 112in electric circuit II, closing the circuit. The con struction is such that when the lever 105 is swung from the position shown in Fig. 6 by the pin 10%, moving around in its upper arc-path toward the right, it first compresses the spring 109 and then carries arm 107 with it, breaking the contact of the circuit-closer 110 with electric terminals 111 and 112, pushingthe arm 107 and contactpiece 110 over to the electric terminals 113 and 114:, which serve mechanically as stops to prevent the in rther swinging of the arms 107andlever105. The shiftingofthe arm 107 is accelerated when released from the terminals 111 and 112 by the action of spring the end of the motor-shaft by the action of 109. When the ratchet-wheel is returned to TIC its initial position by spring 101, the arm 105 is swung back to the position shown in Fig. 6 by the pin 104 on the ratchet-wheel, the pin being then against the lever 105 at the left in Fig. 6'. The terminals 113 and 114 serve as back-stops to the arm 107.

In connection with the ratchet-wheel 102 I provide a releasable back-stop 115, Figs. 6, 12, 13, 17, adapted when in engagement with a tooth of the ratchet-wheel to prevent its rotation in one direction. This back-stop 115 is fixed on radial arm 116 on a rock-shaft 117,

. journaled in the frame 44. The rock-shaft is provided with a radially-projecting pin 118, Figs. 7, 13, to which a spring 119 is attached that serves to hold the back-stop 115 normally in engagement with the ratchet-Wheel 102. An arm 120 projects radially from rock-shaft 117-above a pin-stop fixed in the frame. A rock-shaft 121, journaled in the frame 44, is provided with a radial arm 122, that bears against the arm 120 on that side opposite the stop. The rock-shaft 121 is provided with rearwardly-projecting arms 123, Figs. 7, 8, 17, and a transverse bar 124 unites the extremities of the arms 123 rigidly. A printing-pad 125, preferably of rubber, extending transversely of the machine, is secured in the bar 124, conveniently in a groove therefor. The bar 124 and arms 123 are held downwardly yieldingly by a spring 126. This rock-shaft 121 is provided with a radial arm 127, having thereon an armature 128, opposite to and actuated by the electromagnet 129 in electric circuit C.

A prolongation of the pawl 103, Fig. 12, rests on the back-stop 115, and whenever the armature 128 is drawn to the electromagnet 129 the back-stop 115 and the pawl 103 are lifted out of engagement with the ratchetwheel 102, and the ratchet-wheel is returned to initial position by spring 101. This occurs every time a keyin the keyboard is depressed.

In connection with the ratchet-wheel 102 a radial arm 130, Figs. 6, 12, 14, on hub 99 is secured rigidly to the ratchet-wheel by a nut 131 turning on the hub. This arm 130 is provided with a thereto-pivoted finger 132, capable of tilting in one direction only and held in extended position by a spring 133, which finger is adapted as the ratchet-Wheel is rotated forwardly by its pawl 103 to engage a radial arm 134 on hollow rock-shaft 135, axled on a stud-pin fixed in the frame, Figs. 12, 16. When the ratchet -wheel is rotated in the other direction, the finger 132 strikes against the arm 134 and is tilted, permitting the arm 130 and the finger 132 to pass the arm 134, the finger being thereupon brought to radially-extended position by the spring 133. Another radial arm 136, fixed on rock-shaft 135, is connected by a rod 137 to one arm of a circuit-closing lever 138, pivoted medially on the frame and provided with a terminal insulated metal band 139, forming an electric circuit-closer between electric terminals 140 and 141 in shunt F of electric circuit E, Figs. 6, 19, 34. The lever 138 is held normally out of contact with terminals 140 141 by a spring 142.

For closing the circuit 0, putting the electromagnet 129 into action, and thereby throwing the printing-pad 125 up against the type- Wheel, Fig. 17, a circuit-closer is employed in circuit 0, consisting of the metal elastic terminals 143 and 144, Figs. 5, 34, both mounted on a block 145 of insulating material. These terminals are normally separated, their distance from each other being adjusted by a screw 146, turning in the post on the frame and bearing by its tip of insulating material against the terminal 143, holding it toward terminal 144. A rearward extension 147 of pawl 146, Fig. 5, bears by an insulating-knob against terminal 144, the construction being such that when the pawl 66 engages ratchetwheel 67 the pawl and its extension 147 are first tilted, thereby closing circuit 0 through terminals 143 and 144 and then hold the ratchet-wheel 67 and type-wheel 68 against rotation, while at the same instant the electric current through circuit C actuates electromagnet 129, throwing the pad 125 up against the paper or impression medium, forcing it against the type-wheel and printing the character thereon. The removal of the finger of the operator from the key opens the line electric circuit, and the machine at once assumes its normal conditions.

For shifting the type-wheel 68 along on the shaft 58 while it is being employed in printing a line of words across the paper and for returning it to its initial position the following mechanism is employed: A block 148 is slidable on a rod 149, fixed in the frame parallel with the shaft 58, Figs. 1, 2, 3. An arm 150, rigid on block 148, is provided with curved terminal fingers that ride in a circumferential groove therefor in hub 151 of the type-wheel. A shifting-strap 152, attached to the block 148, runs on a winding-up wheel 153, axled in the frame. 154, attached to block 148, runs in the other direction on a winding up wheel 155. A ratchet wheel 156 is rigid on the axle of wheel 153, Figs. 9 and 10. To rotate the Wheel153 intermittingly and correspondingly moving the type-wheel along on shaft 58, a pawl 157, adapted to engage the teeth of the ratchet-wheel, is pivoted on arm 158, hinged A returning-strap on the frame 44. The pawl is held up to the wheel yieldingly by spring 159. The arm 158 is provided with an armature 160, adapted to be actuated by electromagnet 161 in circuit D. The armature 160, Figs. 3, 34, is held in normal position away from the electromagnet 161 by a spring 162. A dog 163, pivoted on the frame, engages releasably the teeth of the ratchet-wheel and holds it against rotating backward. The dog 163 is held to its work by a spring 164, secured to the frame. For releasing the pawl157 and the dog 163 a pin 165, Figs. 9, 10, 11, projecting laterally from ashiftable rod 166, is adapted to engage pawl

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