US388141A - Electrical type-writer - Google Patents

Description

(No Model.) 3 Sheets-Sheet 1.

`J. F. MGLAUGHLIN.

ELECTRICAL TYPE WEITER.

Patented Aug. 21, 1888.

SETTLEET; INUENTEPI;

N. PETERS, Phnwumngnpnqr. wanhingtnn, DA1

s sheetssheen 2,

(No Model.)

J. P. MGLAUGHLIN.

ELECTRICAL TYPE WRITER.

Patented Aug. 21, 1888.

3 Sheets-Sheet 3.

(No Model.)

J. F. MGLAUGHLIN.

ELECTRICAL TYPE WEITER INUENTUH lili his dbmzgys.

N. PETERS. Phawmhognpher, washingmn, n.4;

UNITED STATES PATENT AEEreEo JAMES F. MOLAUGHLIN, OF PHILADELPHIA, PENNSYLVANIA.

ELECTRICAL TYPE-WRITER- SPECIFICATION forming part of Letters Patent No. 388.141. dated August 2l. 1888.

Application tiled September 15. 1887. Serial No. 240,781.

T0 all whom it may concern,.-

Be it known that I, JAMES F. MoLAUGHLIN, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Electrical Type-XVriters; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an electrical typewriter capable of being used either as an independent electro mechanical instrument or as a combined transmitter and receiver for printing-telegraphs.

As an independent electro-mechanical typewriter it consists, essentially, of a mechanically-arranged key board carrying the ordinary letters, characters, and punctuationmarks necessary for use in machines of this description. The depression of any key thereof will mechanically arrest the rotation of a revolving disk mounted on a shaft which carries the type-wheel with the type-letter corresponding to such depressed key in the proper position to be imprinted on the paper by means of certain auxiliary devices described hereinafter, and such depression at the same instant will effect the closure of a local electrical circuit, by means of which the electro mechanical printing and letter-spacing mechanisms are operated.

When, as before stated, it may be found desirable or necessary to use my instrument in the capacity of a combined transmitter and receiver, it is only necessary to connect it electrically with a line-circuit by an ordinary lever-switch, each key being so arranged that its depression will cause an imprint of a corresponding type-letter upon the paper roll both of the local receiver and the receiver or receivers at the extremity or extremities of the line or lines. When desirable or necessary to attach or cut out either the local receivinginstrument or the receiver at the end of the line, or both at the same time, certain means for aeeomplishing this result are provided, as will be more fully explained hereinafter.

The construction and arrangement of the particular parts of this invention are substan- (No model.)

tially the same when the instrument is used as a local type-writer, as when electrically combined with the transmitter for printing -telegraphs, except when used as a combined transmitterand receiver for printing-telcgraphs. In the former instance the key-board is operated mechanically with respect to the typeletters, and in the lat-ter is electro-mechanical.

My invention consists, further, in certain details of constructionarrangements,and combinations of parts and electrical connections, all of which will be more fully described hereinafter, and the particular points of novelty in which Will be specifically pointed outin the appended claims.

Referring to the accompanying drawings, which form a component part of this application, Figure 1 is a view in side elevation of my improved machine,the traveling` carriage, its separate platform, and thc paper-'feeding machine all being removed to more clearly illustrate the essential parts of construction. Fig. 2 is a top plan view of the type-wheel,the escapement-disk, the front guide-rest of the platform for the traveling carriage, the inkreservoir, and the key-board. Fig. 3 isa similar View in which one stop-lng is employed for two key-levers and type letters. Fig. 4 is a detail inverted plan view ofthe eseapementdisk, in which one stop-lng is employed for each and every key-lever and type-letter.

Like numbers and letters of reference indicatelike or corresponding parts in all the several views of the drawings.

Before entering into a detailed description 0f the construction and operation of my invention it would be preferable to here state that the major portion ofthe construction illustrated and described hereinafter is shown,dc scribed, and claimed in my separate concurrent application filed August 24, 1887, Serial No. 247,764, which contemplates the use of these several parts and organizations in connection with a suit-able separate transmittinginstrument. Thereforeit must be understood that the object of this application is to present an improvement over the aforesaid pending application by utilizing the same parts, with some changes in addition, as a combined transmitting and receiving instrument in one organized machine. Consequently only those IOO parts which are described and claimed in the other application will be claimed herein as co-operating to produce the result sought to be attained hereby. And, furthermore, it will 'be hereinafter understood that this invention will be first described as a combined transmitting and receiving instrument, respectively, at two extremities of a line-circuit; and, moreover, it will be ag-ain understood that the complete instrument shown in Fig. 1 will be hereinafter referred to as being located at two extremities of the linecircuit; or, in otherwords, this figure can be made to represent two stations connected by a line-wire.

Referring to the drawings by numbers, 1 designates the key board, which consists of a series of pivoted current-conducting key-levers, 2 2, haring curved forward portions 3 3, carrying the keys 4 4, which latter bear the symbols of the key-board, and the rear extremities, 5 5, of said ke ylevers 2 2 are all of exactly the same lengt and are cach provided at their extreme ends with enlarged weighted portions 6 6, having the upwardlyextending studs or lugs 7 7. (See Figs. 1 and 2.)

At the junction of the front and rear portions, 3 and 5, in each key-lever 2`2 is formed a perforation, through which is inserted the pivot-rod 8, which acts as the fulcrumpoint or support of all of the said key-levers.

9 represents a single casting, two of which are screwed to the base 11 of the instrument, as shown in Figs. 1 and 2, and serve, respectively, as guide-supports for the key-levers 2 2 and as bearings for the pivotrod 8, to which latter is fulerumed the series of key-levers, as before stated, and as shown clearly in Fig. 1. base, 10, forming a segmental line or cord across the upper surface of the circular base 11, and an upright portion, 12, of sufficient height to support the pivot-rod 8 the requisite distance above the said base. In the top edge or face of this portion 12 is located a longitudinallycurved recess (shown partly in Fig. 2) extending the entire length thereof, the object of this construction being to forni a bed for the pivot-rod 8 and to furnish a space intervening between the said pivot-rod and the bottom of the recess, so as to allow a certain play for each lever at its fulcrum-point. Transversely in the top face or edge of this portion 12 are formed a series of inclined recesses, 13` 13, which intersect the longitudinal recesses and correspond in number to the number of key-levers 2 2, which latter are each perforated at their fulcrum-point's and are slipped over the pivot-rod 8, fitting in and being guided by the recesses 13 13, (see Fig. 2,) thereby forming an are or fan shaped keyboard for the purpose of affording convenience in manipulation. However, it will be obvious that the key-board mightbe arranged in any other desirable or suitable manner without departing from the spirit of my invention. The two castings are cach of metal Each casting comprises a curved and are electrically connected together by a suitable wire. (Not shown.)

Directly underneath the key board and upon the supplementary base 11 of the instrument is secured the guard-plate 16, which extends transversely under the said key-board and forms a limiting medium for the play of the key-levers, which are, as shown in Figs. 1 and 2, ,providcd with the adjustingscrews 17 17, so inserted in the said key-levers intermediate of the keys 4 4 and the fulcrumpoints as to adjust the distance that any keylever can vbe depressed at will.n As before stated, the rear free extremities of all thekcylevers are each provided with an enlarged portion, 6, which serves as a retracting agency for any one of said levers after it has been released from the finger of the operator; and each portion 6 is provided with an upwardly-projecting metallic escapement pin or lug` 7, which is tipped on its upper surface with insulation 17, the sides 'of each of said lugs being left` bare, (electrically exposed,) so thatthe proper electrical contact may be made therewith in the manner hereinafter explained. p

A lip, 19,' projects outwardly from the inner side of the casting 9, and a binding-post, 18

provided with a lateral-extending spring con-,V

95A said lip 19 for electrically connect-ing the two:

tact-plate, 20, is screwed down through the castings with a battery, 15, and the plate 20 is designed to make contact with the pivoted switch-lever 21 (similar to the circuit-closer of the key of a Morse instrument) when the machine is used as an automatic receiver, as will appear subsequently. A metallic vertical shaft, 22, passes centrally through the machine, as shown in Fig. 1, and is mounted in suitable bearings in the bases 11 and 23 and in the frame-work of the elevated platform, which latter supports the traveling carriage.` (Not shown.) Upon the upper extremity of this shaft 22 is secured the rotatable type-wheel 24, around the periphery of which are dis- ,posed the letters, symbols, or characters necessary for use in printing, the said letters, symbols, and characters being arranged equidistant from each other, and leaving at one point upon the periphery of the said typewheel a space, 24, (see Fig. 2,) equal to the distance Abetween two alternate letters, the object of which will be described hereinafter. This type-wheel is centrally perforated and is inserted over the screw-threaded endof. the shaft 22, resting upon and supported by the shoulder or collar 25. This type-wheel is rigidly keyed upon its 'shaft between the nut 26 and the collar 25.

27 designates 'a horizontal journal-bracket secured to the frame-work of the elevated platform, and provided at one end with the fastening-screw 28L andat the other extremity with the clamp-screw 29, which latter fits ina diamond point in the upper end of the shaft 22,forming the other journal-bearing therefor.

Centrally on the shaft 22 is rigidly mounted IOO a thin metallic disk, 28, of larger diameter than the type-wheel, having its under plane circular surface studded with a series of spirally-disposed stop lugs or pins, 30, which are so relatively arranged as to have different radial distances from each other, no one stoplug occupying the same distance from the center t of the disk 28. (See Figs. 3 and 4.) Thus it Will be understood that while the disk 28 is revolving should one of the lugs 30 come into contact with any affixed or adjusted obstructions-say, for example, one or more ofthe escapement-lugs 7 7 of the key-levers 2 2-the said obstruction or obstructions would only lie in the path of that particular stop-lug, since the said stops are spirally arranged at a diii'erent and relative distance from the center of the disk.

Each stop-lug 30 is intended to represent one or more corresponding type-letters on the periphery of the typewheel 24, and each of said stops occupies a relative position on the under surface ofthe disk 28 with regard to its corresponding type letter or letters on the periphery of the type-wheel, as will be clearly explained hereinafter. In one case, as showuin Fig. 3, each lug represents two letter-type on the type-wheel 24-that is to say, any two respective typeletters which are represented by a single and corresponding stop-lug 30 are arranged both with relation to each other and with their corresponding stop 30 on the periphery of the type-wheel. Suppose, for example, the lug marked g in Fig. 3 is intended to represent two letten type on the type-wheel, such as h' and N. Now, in order to clearly comprehend the relative construction of these several parts it must be first understood that all of the several keylevers 2 2 terminate at their free rear extremities exactly on a line corresponding to a transverse diameter of the disk 28; or, in other words, the ends of all the key -levers when viewed as illustrated in Fig. l are in the same Vertical plane, or their longitudinal or basis line of that plane runs diametrically through the disk 28. Again, it will be understood that inasmuch as the disk 28, whose shaft is designed to he revolved in unison with the shaft (not shown) at the other extremity of the line, is rigidly keyed to thc shaft 22, and that the type-wheel is also similarly keyed to this shaft, the relative positions of the corresponding stop-lugs 30 and the type-letters will be uniformly maintained during the revolution of the shaft; and, furthermore, it will be appary ent that when any one lug meets the obstructing end 7 of any key-lever thc type-letter corresponding to such keylever and the lug must be opposite to the impact-lever 29. Now, in order that these requirements may bc fulfilled, the relative arrangement of the keylevers, stop lugs, and letter-type is as follows: Take the stoplug marked g in Fig. 3 and designate the same as corresponding to both let board for engaging and stopping the revolution of this one lug g, one key-lever bearing the letter Nand the other, M; and, inasmuch as the lug g is farthest from the center of the disk 28, the end of each key-lever marked, respectively, M and N, in Fig. 2, would be sepa rated from the other a distance equal to the diameter of a circle which has a radius equal to the distance from the lugg to the center t' of the disk 28. Consequently, this lug g, having been engaged and released by the key-lever marked M in Figs. 1 and 2, would not come in contact with the lever marked N in Fig. 2 until it (the lug) had completed .one-half of its revolution-z'. A line, such asx x, drawn diametrically through the disk 28 from the lug g, would intersect the circle h at the point where this lug g would come into engage ment with the key N. By au inspection of Fig. 3, it will be seen that the line fr or passes centrally between any two lugs on the opposite side of the disk 28, the object of which construction will appear hereinafter. As shown in Fig. 2, the diametrical line i/ y, drawn from the end of the impact-lever 29 through the type-wheel 24., would be identically at right angles with the horizontal line z z marking the vertical plane of the ends of the keylevers, and since each stop-lug 30 must engage each lug 7 of its respective key-lever, no matter on which side of the disk 28 the engagement takes place, at a point coincident with this horizontal line zz, and, since the particular type-letter on the type-wheel which corresponds to its lug 30, which is engaged' by any key-lever depressed, must be coincident with the end ot' the impact-lever 29 at the time its respective lug is stopped, it will be seen that each typc-letter is located on the periplr ery of the typc-wheel at a point at right angles with its respective stop-lug, provided that the two disks were in thc same horzontal plane, and the typewhecl was bounded by the disk 28, as conventionally exemplified in Fig. 2, aud inasmuch as each stop-lug 30 represents two type-letters on the type-wheel 24, and as any two typeletters represented by a single lug are diametrically opposite to each other in relative location, to accord with the relative location of the ends of the two keylevers which correspond to these two typeletters and one lug, it will be obvious that no other lug 30 on the opposite side of the disk must be coincident with the horizontal line marking the ends of the keylcvers at thetime a stoplug is engaged by a key-lever. Accordingly such provision is made by thc construction shownin Fig. However, in practice it may be desirable to have a stop-lug 30 for each key-lever and lettertype, and to meet such requirement I havedevised the construction of disk shown in Fig. 4.

From the foregoing description and aecompanying illustrations it will bcconccdcd, first, that I am able to provide a key-board carr ters N and M. Then, in this instance, there ing both upper and lower case, and a typewheel havingthe corresponding type letters or will of course be two key-levers of the key- IOO IIO

4` esami' characters disposed thercaround; and, second,

to thereby effect the imprint of both the upperk and lower case with stop-lugs equalin number to either onehalf or the whole of the`key-levers and type-letters.

Each of the key-levers 2 2 is made of metal, and, as before stated, is bent up atits fulcrumpoint, as shown in Fig. 1, the rear portion thereof being in a different horizontal plane from the front portion,for the obvious purpose of being on a nearer plane with the under plane of the revolving disk 28, so that a desuitable rccess in the frame or bracket 32.

Ithe binding-post 50 by wire 51.

33 designates a vertical plate which projects up from and is formed integral with the lever 29 and carries the armature 34 of the electrolnagnet 35, which in turn is suitably attached opposite to its armature upon the frame 32.

36 designates an adjusting screw secured through the vertical plate 37 for limiting the movement of the impact-lever.

The binding-post 18 is connected with one,

pole of the'baltery l5 by the wire 38, andthe switch-lever 21, which is adapted to make engagement with the plate 20 of the bindingpost 18, is electrically connected by the Wire 39 with the brush 40, which bears upon the collar 41 of the vertical shaft 22, the said brush 40 being in turn connected with the electromagnet35 by the wire 42, and the electromagnet 35 is connected by wires 43 and 45 with the spacing-magnets 44. Thespacingmagnets 44 of the electro mechanical step-by-step mechanism for advancing the traveling carriage at a determinate instant after each imprint is made is connected by wire 48 with the electro-` magnet 49, which in turn is connected with The bindingpost 50 is in circuit with the buttonswitch 52 by Wire 53, and with the switch-terminal 54 by wire 55,the other switch-terminal, 56, being connected with the bell 57 by wire 58, and the bell connected to the ground by wire59. The lever 60, which is adapted to make contact with the switch-terminals 54 and 56, is in circuit with the line.

Upon the base of the instrument is secured the electro-magnet 49, having its lower pole converted and 'brought up parallel with the side of the magnet-helix over, above, and in close proximity to its upper pole, forming, substantially,an elbow-shaped frame; and centrally in the magnetic field, between the said poles of the electro-magnet 49,'is designed to revolve the soft-iron armature-disk 6l, which in turn is keyed rigidly tothe shaft 22 by the collars 62 62, this construction forming'the one lettered A, in Fig. 1.

electro-magnetic unison device `for arresting the revolving central shaft of one instrument simultaneously with the depression of another separate and distant instrument, as will be clearly explained in the operation. the stop lugs 30 upon the disk 23 is arranged to correspond with the space 24a on the periphery of the type-wheel 24'in such a manner that the said Vspace 24 will stop opposite to theimpact-lever 29, when its corresponding lug 30 comes into contact with the upwardly-projecting lug 7 of thc spacing-key 63.

64 designates the front guide-rest of the elevated platform of the traveling carriage, and

One" ofv 65 is a rectangular receptacle located underi,

neathahd supported by the front guide-rest 64, and is provided with the lid 66. for gaining access to the conical receptacle 67, which contains the ink for coating the rollers 68 68, the said rollers being in slight contact with the edge ofthe type-wheel 24.

For the sake of clearness I have shown theA automaticelectrd magnetic letter-spacing 1no" torfor advancing the traveling carriage (not shown) step by step at"`a determinate instant i after each type-impact has been made, to-` gether with other non-essential details of construction; but these features will not be further dwelt upon herein, as they form the subject-matter of several concurrent and future applications.

` The spacing-magncls 44, being included ,inv

the main circuit, must be arranged to operate rthe traveling carriage at a determinate instant after the action of the impact-lever magnet without impeding the passage of the current, which arrangement can be effected in a variety of ways; but I. prefer adjusting the retractile spring of the armature so that the combined Y tension of the spring and the weight of the armature' will serve to make the mechanical ac-A tionresulting from the magnetic force of attraction of said spacing-magnets subsequent to the action of the impact-lever.

lThe operation of my invent-ion when used as a combined transmitting and receiving instrument is as follows:

In giving a detailed and comprehensive elucidation of the function of my instrument it will have to be understood, as before stated, that the organization of apparatus illustrated in Fig. 1 must be used to represent two distinct and separate stations, and with this understanding the operation will now be described. The instrument beingin the position shown in Fig. 1, with the switch-lever 21 and the button-switch 52 thrown open,'and the arm 60 upon the switch-terminal 54, and the operator desires to convey a message-say, for example, theworls dynamograph machineover the line to a distant station, Fig'. 1, he successively depresses the keys of the instrument composing thestipulated message. Now, in order to clearly follow the operation, we will suppose that the first key depressed is the Consequently the depression of said key elevates the rear ex= tremity, 5, of said key-lever until the lug 7 is in line with the particular lug 30 which corresponds to the letterD on the type-wheel. Then the revolving disk 28 will instantaneously force its lug 30 against the lug 7 of thisV lever 2, thereby stopping said disk with theletterD opposite to the impact-lever 29. N ow, at the same time that this lug 30 engages the end of the lever 2, the circuit will be instantaneously closed from the battery 15, wire 38, binding-post 18, lip 19, casting 9, rear portion, 5, of the lever 2, lug 30, shaft 22, the brush 40, the wire 42, to the magnet 35, energizing said magnet and causing the attraction of its armature 34, and consequently forcing the rubber-tipped end of theimpact-lever against the paper (not shown) and effecting the imprint of the type-letter D thereupon at the same instant the said type-letter is stopped at the impact-point by the engagement of key-lever with its lug 30. Then the same impulse, discharged from the battery 15 through the magnet 35, passes instantaneously over its path 43 and 45 to the `spacing-magnets 44 and energizes the latter and effects the operation of the letter-spacing mechanism at a determinate instant after the imprint is made upon the paper, said spacingmagnets being of a higher resistance than the magnets 35. Now the impulse imparted by the depression of the key A having, as just described, energized the magnets 44, it will pass through the wire 48 into the magnet 49, energizing the same and effecting the attraction of the disk 61; but the shaft 22 having been previously arrested in its revolution, this latter action will be unnecessary at this station, and the same impulse, after energizing the magnet 49, will traverse the wire 51, binding-post 50, wire 55, switch-terminal 54, switch-arm 60, over the line to the instrument located at the other extremity ofthe line. New, it being understood that Fig. 1 convention ally represents the said station at the distant extremity ofline,theimpnlse which has passed over the line will enter through switch-arm 60, switch-terminal 54, wire 55, binding-post 50, wire 51 to the magnet 49, energizing said magnet and arresting the rotation of the shaft 22 at the same instant that the impulse was imparted at the other end of the line,with the letter D upon the type-wheel opposite to the impact-lever 29, in the same manner as described with reference to the iirst-mentioned station. Then the current instantaneously traverses its path 48,spacingmagnets 44,wires 43 and 45,into magnet 35, energizing said magnet and causing the attraction of its armature 34 and the consequent stroke of the impactlever 29, thereby effecting another and similar imprint of the letter D upon the paper. Then the spacing-magnets 44 being arranged as before stated, the traveling carriage will be advanced one letter-space at a determinate instant after this imprint is made at such distant extremity, theimpulse passing simultaneously from the magnet 35, through wires 42 and 39, switch-lever 21, binding-post 18, wire 38, battery 15,to ground, the said switch-lever 21 being closed at such distant extremity, in order that the impulse may ilnd a closed circuit through the distant instrument. The operator at such distant extremity ot' the line is notified to close the lswitch-lever 2l, in order to automatically receive, by having his switch-arm 6() normally on the switch-terminal 56 of the bell 57. Thus, when a preliminary impulse is sent from the local station to a distant eX- tremity,such impulse will ring the bell 57 and thereby notify the receiving-operator to close his switch 21 and to change his switch-arm 60 upon the switch-terminal 54. Thus the operation is repeated until the end of the word dynamograph7 is reached. The operator now being desirous of making a space between the words completed dynamograph 7) and the next word to' be printed, (machine,) he depresses his spacing-key G3, Fig. 2, thereby causing the stop-lug 30 corresponding to the space 24 on the type-wheel to come into Contact with the upwardly projecting lug 7 upon the said lever 63, thereby stopping the type-wheel with the space 24 opposite the impact-lever 29. The path of the electric current will now be identical with that hereinbefore described in connection with the depression of a letter-key, and the operation of the several parts will be the same as in that instance, with the exception that the impactlever 29 cannot force the paper against the type; and the said impact-lever being so adjusted that it can move forward only a sutlieient distance at each stroke to come in contact with the face ofthe type, it will be seen that it Will not force the paper against the typewheel, but will simply strike the back thereof and produce no imprint whatever, while the space will be iliade in the same manner as when a letter-key is depressed. Thus it will be understood that the operator transmits the dcsired message over the line and at the same time records the said message at both extremities by means of the instrument shown in Fig. 1. Should it now be desired to usc the instru ment locally, it is only necessary to change the switch-arm 60 to the switch-terminal 56 and close the button-switch 52. Then the traveling carriage reaches the end of a printed line through the agency of the electro` mechanical letter-spacing motor, it is automatically recoiled and the paper-feeding and line-spacing devices are instantaneously operated. However, the mechanism for accomplishing these results, although partly illustrated, will not be described in detail for reasons above stated.

Of course, it will be understood that the shaft 22 of the instrument is rotated in unison with the shaft or shafts ol' the instrument or instrumentsat any terminal or intermediate stations by means of a synchronal motor. However, I deem it preferable to use for this purpose the motor shown and described in my patent, No. 368,411, dated August 16, 1887; but any operative unison device may be IIO IZO

substituted. As the type-wheel is revolved, it is continually in contact with the ink-roller shown in Fig. l.

Having thus fully and accurately described my invention, what I claim, and desire to seeu re by Letters Patent of the United States,is-

l. An electrical type-writer comprising a circuit-controlling key-board, a current-conducting revolving stop-disk controlled by said key-board, a local circuit also controlled by said key-board, a main-li ne circuit,andswitehes and connections 'for connecting and diseon` necting the main and local circuits.

2. An electrical type-writer conxprising a circuit-controlling key-board, a current-com ducting revolvingstopdisk controlled by said key-board, a local circuit including printing mechanism, and also controlled by said keyboard, a main-line circuit, and switches and connections for connecting and disconnecting the main and local circuits.

3. An electrical type-writer comprising a series of circuit-controlling key-levers, a eurrent-conductiug disk provided witha series of stops and arranged to be arrested by the Inovement of any key-lever, an electric circuit including said key-levers and disk, and operated also by a movement of any key-levenan electro-magnetic unison brake,also included in said electric circuit, and a revolving armature-disk controlled by said brake.

4. An electrical type-writer comprising a circuit-controlling key-board, a current-conducting revolving stop-disk controlled by said key-board, a local circuit including letterspaeing mechanism and also controlled by said key-board, a main-line circuit, and switches and connections for connecting and diseonnecting the main and local circuits.

5. An electrical type-writer comprising a series of circuit-controlling key-levers, a revolving current-conducting disk provided with a series of stops and arranged to be arrested in its rotation by a movement of any key-lever, an electric circuitincludingsaid key-lever and disk, and operated also by a movement of anykey-lever,electro-magnetic printing mech anisrn, substantially as described, included in and controlled by said electric circuit, an electro-magnetic unison-brake, also included in and controlled by said electric circuit, a revolving armature-disk controlled by said brake, and electro-magnetic spacing mechan' ism, substantially as described, also included in said electric circuit and arranged to be operated at determinate instant after the operation of the printing mechanism.

G. In a printing-telegraph, two or more iustruments located, respectively, at two or more stations of a linecircuit, and each comprising, essentially, a series of circuit-controlling key-levers, a rotary current-conducting disk and type-wheel upon a common shaft, an electro-magneticallyactuated printing-lever, an electro-magnetic unison-brake controlling the rotation of said shaft, and electro-magnetic spacing mechanism,substantially as described. in combination with aV line-circuit, including said key-levers, disk, and the actuating electro-magnets of the brake, printing-lever, and spacing mechanism, and a synchronal motor for revolving the shafts of the respective instruments.

7. In a printing-telegraph, two or more instruments located, respectively, at two or more stations of a line-circuit, and each comprising, essentially, a series of cireuit-controlling keylevers, a rotary current'conducting disk and typelwheel upon a common shaft, an electro'magnetically-actuated printing-lever, an electro-magnetic unison-brake controlling therotation of said shaft, and electro-n'iaguetic spacin g mechanism, substantially as described, in combination with a line-circuit, including said key-levers, disk, and the actuating electro-magnets of the brake, printing-lever, and spacing mechanism, a synchronal motor for revolving the shafts of the respective instruments, switches, annunciators, and circuit-connections for the line-circuit. f

8. In a'printing-telegraph, two instruments located, respectively, at two stations of a linecireuit, and each comprising a series of circuit-controlling key-levers, a revolving current-conducting disk provided with a series of stops, whereby it may be arrested in its rotation by a movement of any key-lever, and an electromagnetic unison-brake controlling the rotation of said stop-disk, in combination with a line-circuit including the said key-levers, stop- ICO disk, and the actuating electro-magnets of said l cuit-controlling key-levers, a revolving cur- Y rent-conducting disk provided with a series of stops, and a type-wheel rotating in fixed relation to said disk upon a common shaft, said disk being arrested iu its rotation by a movement of any key-lever, a synchronal motor for said shaft, and an eleetromaguetic brake also controlling the rotation of said shaft, in combination with a linecircuit, including said key-levers, disk, and the actuating electromagnet of the said brake, and switches and circuit-connections for the said line circuit.

In testimony whereof I afiix my signature in presence of two witnesses.

J. F. MOLAUGHLIN. Witnesses:

GEO. H. TrcHENoR, PERoY C. BOWEN.

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