US907604A - Keyboard telegraph system. - Google Patents

Description

0. K. J ONES.

KEYBOARD TELEGRAPH SYSTEM.

m m mm W mm m/ m WK I APPLIOATION FILED APR. 23, 1

ljfiiufisw W G. K. JONES.

KEYBOARD TELEGRAPH SYSTEM.

APPLICATION FILED APR. 28, 1908. 907,604. Patented Dec. 22, 1908.

' 4 SHBETSAEEBT 2.

n1: uosms PETERS 60., WA

G. K. JONES.

KEYBOARD TELEGRAPH SYSTEM.

APPLICATION FILED APBHZB, 1908.

Patented Dec. 22, 1908.

4 SKEETS-SHEBT 3.

/III III?! THE aromas PETERS co., wnsnmnnm, n. c.

G. K. JONES.

KEYBOARD TELEGRAPH SYSTEM.

APPLICATION FILED APR.2B, 1908. Patented Dec.

4 SHEETS-SHEET 4.

III/00707191 6720101705 CHARLES K. JONES, OF ROSEDALE, KANSAS.

KE YB OARD TE LE GRAPH SYSTEM.

Specification of Letters Patent.

Patented. Dec. 22, 1908.

Application filed. April 28, 1908. Serial No. 429,783.

To all whom it may concern:

Be it lmown that 1, CHARLES K. Jones, a citizen of the United States, residing at Rosedale, in the county of Nyandotte and State of Kansas, have invented certain new and useful Improvements in Keyboard Telegraph Systems, of which the following is a specification.

This invention relates to keyboard telegraph systems and my object is to produce an efficient and reliable apparatus whereby the operation of a series of keys shall result in the transmission of the usual telegraph signals at greater speed and with more uniformity in the length of the dots, dashes and spaces and less chance of error than where Y the usual manually-operative telegraph key is employed.

A further object is to produce a telegraph system of the type outlined provided with means whereby the speed of transmission may be readily increased or diminished.

v'Vith these general objects in view and others as hereinafter appear, the invention consists in certain novel and peculiar features of construction and organization as hereinafter described and claimed; and in order that it may be fully understood reference is to be had to the accompanying drawings, in which Figure 1, is a diagrammatic view of a key board telegraph system embodying my invention. Fig. 2, is a vertical section taken on the line II-II of Fig. 3, showing the preferred mechanical construction and organization of the mechanism of the system. 3, is a horizontal section taken on the line III-III of Fig. 2. Fig. 4, is a cross section taken on the line IVIV of Fig. 2.

Before proceeding with a detailed description of the construction and operation of apparatus embodying the invention, it is desirable to state that it consists of instruments for producing dots, dashes and spaces; a series of circuit-selecting instruments; a transmitter for sending electric-current impulses over the main telegraphic line; a source of electric energy, key-actuated means for placing the latter in circuit with the desired circuit-selecting instrument or instruments, and a source of electric energy to supply cur rent for the selected paths and to cause the transmitter to close and open the main line or telegraphic circuit and thus transmit the desired impulses of current thereover.

The invention further consists in the use of instruments for making positive the make and break actions of the transmitter, and in the use of means for varying the speed of transmission.

Referring now to the drawings in detail 1, 2 and 3 indicate pivoted space-character armatures; 4, 5, 6, 7, 8, 9, 10 and 11 pivoted spring retracted dot character armatures 12, 13, 14, 15, and 16 pivoted dash-character armatures; 17 a signal transmitting armature and 18 a permanent magnet receiving between its poles the lower ends of the above named character armatures, except armatures 4 to 11 inclusive.

19, 20, 21, 22, 23, and 24 indicate a series of circuit-selecting armatures with their lower ends fitting between the poles of the permanent magnet, it being understood, of course, that a plurality of permanent magnets may be employed, although the various permanent magnets shown in the diagrammatic figure represent but a single one as indicated in Sheets 2, 3, and 4, and more particularly referred to hereinafter.

1, 2, and 3 indicate electro-magnets for causing the armatures 1, 2, and 3 respectively to engage contacts 1, 2 and 3 the permanent magnet through its magnetic attraction for such armatures resisting the first half of such movements of the armatures and facilitating the latter half of such movements, as will be readily understood.

1 2 and 3 are electro-magnets for attracting armatures 1, 2, and 3 from engagement with contacts 1 2 and 3 stops 1 2 and 3" being employed to check such reverse movement of said armatures before they can come into direct contact with the last-named magnets, though of course within the attractive influence thereof, it being noticed that the permanent magnet resists the first half of this reverse movement of said armatures and accelerates the latter half, it being further noticed that the permanent magnet yieldingly holds the armatures in one or the other of their posi tions so as to guard against accidental movement thereof.

4 5, 6", 7 8, 9 10 and 11 are electro-magnets which respectively attract, when energized, the normally spring-retracted dotarinatures 4, 5, 6, 7, 8, 9, 10, and 11, into engagement with contacts 4 5 6 7 8 9, 10 and 11 12 13 14 15 16 are electro-magnets for attracting the dash- character armatures 12, 13, 14, 15, and 16, and 12 13 14 15 and 16 are similar electro-magnets for reversing such movements of' said armatures, the movement of each armature being first resisted and then accelerated by the permanent magnet. 'lhe attraction of said armatures by the magnets 12 13, 14 15*, and 16 causes their engagement withthe contacts12 13 14 15 and 16 and breaks their engagement with the opposite contacts 12 13 14 15 and 16 The attraction of said armatures by the magnets 12 13 14 15 and 16 breaks the engagement between the armatures and the contacts 12 13 14 15 and 16 and causes them to engage the contacts 12 13 14 15 and 16 17 a and 17 are electro-magnets at opposite sides of armature 17, the former being adapted to attract said armature until it engages the stop 17 thus breaking the engagement of said armature with contact 17 into engagement with which electro-magnet 17 tends to attract such armature, the movements of said armature being first resisted and then accelerated by the permanent magnet, which in all cases tends to hold the armatures projecting between its poles against accidental movement.

19, 20 21, 22 23 and 24 are electromagnets tending to attract armatures 19, 20, 21, 22, 23, and 24 into engagement with contacts 19 20 21 22 23 and 24 19 20 21 22 23 and 24 are electromagnets to reverse such movements of armatures 19, 20, 21, 22,23, and 24, respectively, and thus break electric connection between said armatures and contacts 19 20 21 22 23 and 24 and establish electric contact between said armatures and contacts 19 20 21 22 23 and 24 In practice all of the armatures described are preferably arranged upright, side by side, in a suitable casing 25, and pivoted on a rod 26 carried by a bracket 27 carried by a bar 28 secured by preference at one end to the back wall of the casing and at the other to a preferably skeleton partition 29 disposed upward in the casing and parallel with its front wall.

Below the pivoted rod 26 and also supported by the back wall and partition 29 of the casing, is a bar 30 whereon the substantially U-shaped magnet 18 is mounted. 31 and 32 indicate similar bars secured at their ends to the back wall of the casing and disposed above and at opposite sides of the pivoted rod 26, and secured to bar 31 are the electro- magnets 1, 2 and 3, and 12, 13,

by bar 32.

14, 15, 16, and electro-magnet 17, and two other electro-magnets hereinafter mentioned, and secured to bar 32 are the electromagnets 1 2 3 4, 5, 6, 7*, 8, 9, 10 and 11 and 12 13 14 15 16 17 19 20 21 22 ,23", and 24, it being well to eX- plain in this connection that the dot- character armatures 4, 5, 6, 7, 8, 9, 10, and 11 although pivoted on rod 26, do not project downward below said rod and into the permanent magnet like the remainder of the armatures hereinbefore mentioned, the springs for holding the dot armatures normally retracted being numbered 33.

The contacts 1 2 and 3 and 12, 13"", 14 15*, and 16*", and 17 and 19, 20, 21 22*, 23 and 24 and two other contacts hereinbefore mentioned are preferably secured to and depend from the top of the casing vertically above their respective electro-magnets carried by bar 31. The stops 1*, 2 and 3, contacts 4', 5 6 7 8 9 10, and 11 12 13 14 15 and 16 and contacts 17, and 19 20 21 22 23 and 24 are carried by and depend from the top wall of the casing vertically above the electro-magnets carried by bar 32. v

34 and 35 are the electro-magnets hereinbefore referred to as mounted on bar 31. 34 and 35 are spring-retracted armatures for said magnets mounted on the pivoted rod 26 and like armatures 4, 5, 6, 7, 8, 9, 10, and 11 not depending into the permanent magnet, spiings 36 being arranged like the springs 33, so as to hold said armatures 34 and 35 normally withdrawn from said magnets and their contacts 34 and 35 which correspond in form and arrangement to the series of contacts 4 5 6 7 8 9, 10 and 11 that is to say, are arranged in line with the latter and the other contacts and stops above the electro-magnets carried 37 is a bar supported like bars 31 and 32, and carrying a number of transmission-retarding electro magnets, two only being shown and numbered 38 and 39, the armatures 38 and 39 being normally held away from their contacts 38 and 39 by springs 40 connected at their opposite ends to said armatures and to a bar 41 paralleling and supported in position like bar 37.

42, 43, 44, 45, 46, 47, 4s, 49, 50, 51, 52, 53, 54, 55, 56, and 57 are horizontally arranged swing-plates hinged at their rear edges by preference, to partition 29, as shown in Fig. 2, and adapted when swung downward, to respectively engage contacts 42 43 44 45 46 47 4s 49 50 51 52 53 54 55 56, and 57*, the contacts 50 51 52 53 54 55, 56 and 57 being yielding contacts by preference, for a purpose which hereinafter appears.

Pivotally connected to each key-lever hereinafter identified, is a pull rod 58, which rod extends sliding up through certain of the swing plates, so as to operate vertically without affecting the same. Above one or more of said plates, however, each rod will be provided with a nut or collar 59 so that when any particular rod is pulled downward through the operation of the key connected thereto, its nut or collar or nuts or collars 59 Wlll swing the underlying swing-plate or swing-plates downward until contact is made with the underlying contact or contacts of the series 42 43 44*, 45 46 47 48 ,49 ,50 ,51 ,52 ,53 54255 56 572 it being understood that when either of the spring- plates 50, 51, 52, 53, 54, 55, 56, or 57 is depressed at the same time as one of the remaining swing-plates, the former will engage and slightly depress its spring contactuntil the other swing-plate makes contact with the underlying rigid contact.

Suitably pivoted to the casingand insulated therefrom is a switch 60 for successively engaging contacts 61 and 62 adapted to be carried by and insulated from the easing, and 63 is another switch carried by and insulated from the casing and adapted to engage a contact 64.

65 is a source of electric energy, such as a battery, and 66 is a wire leading from the positive pole of the battery to magnet 17". 67 is a wire leading -from said magnet to a series of wires 68, 69, 70, and 71 leading respectively to magnets 24*, 23 22 and 21*, wire 67 being also electrically connected by wires 72, 73, 74, and 75, to armatures 3, 2, and 1, and 4 respectively.

7 6' and 77 are wires connecting contacts 3', 2 with electro- magnets 20 and 19 respectively.

78 is a wire connecting contact 1 with magnet 19 and 79 is a wire connecting magnet 19*" with armature 5.

80 is a wire connecting magnet 19 with iagn'et 20 and 81 is a wire connecting magnet 20' with armature 6.

82 is a wire connecting magnets 20 and 21, and 83 is a wire connecting magnet 21 with armature 7.

84 is a wire connecting magnets 21 and 22 and 85 is a wire connecting magnet 22 with armature 8.

86 is a wire connecting magnets 22 and 23 and 87 is a wire connecting magnet 23 and armature 9.

88 is a wire connecting magnets 23 and 24 and 89 is a wire connecting magnet 24 with armature 10.

90 is a wire connecting magnet 24 with armature 11..

91 is a wire connecting contact 62 and armature 40 to armature 24.

92 is a wire connecting contact 24 to armature 23 and 93 is a wire connecting con tact 23 to armature 22.

94 is a wire connecting contact 22 to armature 21.

95 is a wire connecting contact 21 with armature 20.

96 is a wire connecting contact 20 with armature 19.

97 is a wire connecting contact 19 to electro-magnet 4 I 98 is a wire connecting wire 66 to electromagnet 38. 99 is a wire leading from said magnet and connected to wires 100, 101, 102, 103, 104, and 105 leading respectively to magnets 24, 23 22", 21 20 and 19 and to wire 78 connecting contact 1 with magnet 19.

106 is a wire leading from wire 66 to the second magnet of the retarding set, viz., to magnet 39, and 107 is a wire leading therefrom to contact 64, and switch 63 electrically connected permanently to armature 38 and also to a wire 108, leading to switch 60, it being desirable to state in this connec tion that when the retarding set is in circuit tor the purpose of retarding the transmission of signals, the switches 63 and 60 are arranged as shown but that when it is desired to out the retarding set out of circuit, switch 60 is caused to engage contact 62 and thus permit the current to pass around the retarding set and avoid the resistance thereof, as will hereinaiter appear.

109 indicates a second battery or source of electric energy with its positive pole con nected to contacts 42, 43 44 45 45 46 17 48 48 50 51 52 53 54 55, 56 and 57 42 43 44 15 46 47 48 49 50 51 52 53 54 55 56 and 57*, are wires leading from plates 42, 43, 44, 45, 46, '47, 48, 4.9, 50, 51, 52, 5s, 54-, 55, 56, and 57. wire 42 being connected to magnet 11 43 to magnet 10 ,414 to 9 15 to 46 to W, 47 to 6 48 to 5, 49 to 4*, 50 to magnet 3", 51 to 2 52 to 1 55 to 16 54 to 15 55 to 14', 56 to 13*, and 57 to magnet 12*.

110, 111,112,113,114,115,116,and117 are wires connecting magnets 4, 5 6 7, 8, 9, 10 and 11' to the negative pole of battery 109, and 111, 112 and 113 respectively connect magnet 1 with wire 11], 2 with wire 112 and 3 with wire 113.

118, 119, 120, 121 and 122 are wires respectively connecting magnets 12', 13 14 15 and 16 to the negative pole of battery 109.

123 is a wire leading from the negative pole of battery 65 to magnet 34, and 124 is a wire leading from said magnet to a wire 125 from which branch wires 126 and 127 lead to contacts 1.1 and 10 respectively. Branch wires 128, 129, 130, 131 and 132 also lead from wire 125 to contacts 12 '1.3,.14 15 and 16 branch wires 133, 134, 135, 136 and 137 connecting wire 123 with contacts 12 13 14 15 and 16 138 indicates a wire connecting wire 123 to contact 38 and 139 is wire connecting wire 123 to contact 39 140 is a Wire connecting contact wire 116.

magnet 3.

149 is a wire connecting magnet 1 with magnet 12-.

150 is a wire connecting the last-named magnet with wire 125.

1.51 is a wire connecting magnet 2 to magnet 13 152 is a wire connecting magnet 13 with armature 12.

153 is a wire connecting magnet 3 with magnet 14 154 is a wire connecting magnet 14 with the armature 13.

155 is a wire connecting contact 7 with magnet 15 156 is a wire connecting said magnet with armature 14.

157 is a wire connecting contact 8 with magnet 16 158 is a wire connecting magnet 16 with armature 1.5.

159 is a wire connecting contact 9" with armature 16.

160 is a wire connecting wire 123 with armature 34 161 is a wire connecting contact 34 with magnet 35. 162 is a wire leading from said magnet to wire 66.

163 is a wire connecting wire 123 with armature 35*.

164 is a wire connecting contact 35 with magnet 1.7 magnet with wire 66.

166 indicates the battery or source of electric energy of the ordinary telegraphic circuit of which. the transmitter, in this instance forms a part, wire 167 connecting armature 17 with one pole of the battery. The wire 168 leads from the other pole of the battery and the wire 169 is connected to the contact 17 b adapted at times to be engaged by armature 17, a suitable switch 170 being employed to cut, armature 17 out of the telegraphic circuit when desired.

The casing 25 has a forwardly projecting portion 171, above which the keys 172 are 165 is a wire connecting said.

banked as in a typewriter and adapted for manual portion. There is a key for each character of the Morse alphabet and they are mounted upon the upper ends of angleshaped levers 173 pivoted at their rear ends at 174, to the casing, retractile springs 175 being utilized to hold the levers normally elevated.

lVith this apparatus the depression of one Should the dot-character armature 9' through the depression and release of the proper key, be caused to alternately engage and become disengaged from its contact 9 six dots or short closures will follow at regular intervals on the main line, being produced by the alternate closing and opening of the main line through the operation of the transmitter armature 17. The depression of said armature 9 will produce the first dot and the successive automatic depressions of the armatures 8, 7, 6, 5, and 4, the second, third, fourth, fifth and sixth, respectively. With the switches 60 and 63 arranged as shown, the circuit will be automatically made through the entire set of signal transmission retarding magnets, two of said magnets viz. 38 and 39 only being shown in the drawings for convenience and simplification of illustration, it being understood that the current 1 will pass through the set of retarding magnets in the interim between the production ofeach of said dots.

To transmit the signals at the maximum speed, switch 63 is thrown off contact 64 and switch 60 is caused to engage contact 62, the result of this adjustment cutting the retarding set of magnets out of circuit. In actual practice there will be more than two retarding magnets and contacts and more than two contacts 61 and 62 for switch 60, to enable the operator to so adjust switch 60 that the current will pass through the desired number of the retarding magnets. The operator will thus be enabled to transmit signals at speeds intermediate of the minimum and maximum capacity of the apparatus.

Assuming that it is desired to transmit the word on, the operator depresses char- 1 a acter key 0 and through the instrumencontact 52 an infinitesimal fraction of time before 47 As a result of the engagement of plate 52 and contact 52 an electric current passes from battery 109 through 52*, 52, 52 magnet 1 wire 111 connecting said magnet with wire 111, and through the lastnamed wire to wire 111? connected to the opposite pole of the battery 109. This current energizes magnet 1 which attracts armature 1, from engagement with contact 1 against the resistance of the permanent magnet, stop 1 limiting the movement of the armature so that it shall not come into direct engagement with the pole of the magnet 1 or the opposite pole of the permanent magnet, which as hereinbefore explained, tends to hold said armature in its new position.

The circuit completed by the engagement of plate 47 with unyielding contact 47 is from the positive pole of the battery 109 through 47*, 47, 47 magnet 6 112, and 111 back to the battery 109. The completion of this circuit energizes magnet 6 and attracts its armature 6 into engagement with contact 6 thus completing a circuit from the positiv pole of battery through wire 66 to magnet 17*; thence to wire 67 and wire 73 to armature 2 and contact 2 and wire 77 to magnet 19*; thence through wire 80 to magnet 20 thence through wire 81 to armature 6 and contact 6*" thence through wire 148 to magnet 3 thence through wire 153 to magnet 14-; thence through wire 154 to armature 13 and contact 13 thence through wires 129, 125 and 124 to magnet 34, thence through wire 123 back to the negative pole of battery 65. The completion of this circuit energizes magnet 17 which attracts its armature 17 from stop 17 to contact 17 and thus completes the regular telegraphic circuit and sends a pulsation of current over the main or telegraphic line. As a result of the energization of magnet 19 armature 19 is disengaged from contact 19 and engaged with contact 19 and as a result of the energization of magnet 34, its spring-retracted armature 34 is caused to engage the contact 34 The engagement of armature 19 with contact 19 and armature 34 with contact 34 completes circuits preliminary to the completion of a circuit through magnet 17 in order that the energization of the latter may be delayed a fraction of a second after the energization of magnet 17 and thus give the latter time to effect the closure of the main line or telegraphic circuit. he circuit completed by the contact 01 19 with 19 and 34 with 34* is as follows: from battery 65 through 66, 162, 35, 161, 34 34 160 and 123 back to the battery. The completion of this circuit energizes magnet plate 47 engages rigid contact- 35 which attracts 35 to" contact 35"" and completes the following circuit: from bat tery 65 through 66, 165, 17 164, 35 35 163 and 123 back to the battery. The comlpletion of this circuit energizes 17 which attracts 17 and therefore reopens the main or telegraphic circuit and thus completes the first .dot of the character (0).

To delay the transmission by increasing the interval of; time between closures of the main or telegraphic circuit, and circuit as completed through the first magnet of the retarding mechanism, this circuit being as follows: from battery 65 through 66,-98, 38, 99, 77, 19 30, 20 31, 6, e 143, 3 153, 14 154, 13, 13 129, 125, 124,34 and 123 backv to the battery. This energizes 38, which attracts 33 and completes a circuit through the second retarding magnet as follows: from 65 through 66, 106, 39, 107, 64, 63, 38, 38, 138 and 123 back to the battery 65. This circuit causes magnet 39 to attract its armature 39 and effects the completion of a series of circuits through which eventually the main or telegraphiccircuit is kept open for a suflicient length of time to produce a space between the first first of these circuits is completed'by the attraction of armature 39 to 39 by magnet 39, and is as follows: from battery 65 through 55,43,25 145,19 19, 95, 20 20, 95, 21 21, 94, 22 22, 93, 23 23, 92, 24 24, 91, 39, 39 139 and 123 back to the battery. The completion of said circuit energizes magnet 5, which attracts armature 5 to contact 5" and completes the following circuit: from battery 65 through 66, 98, 38, 99, 78, 19 79, 5, 5 147, 2 151, 13 152, 12, 12 128, 125, 124, 34 and 123 back to the battery 65. This energizes 19 which attracts armaturc 19 to 19, magnet 38 which attracts its armature 33 to 38 and magnet 34 which attracts its armature 34 to 34 and the following circuit results: from battery 65 through 66, 162, 35, 161, 34 34 160 and 123 back to the battery 65, magnet 35 thus energizes attracting its armature 35 to contact 35" and completing the following circuit: from battery 65 through 66, 165, 17 164, 35 35 163 and 123 back to the battery, it being noted in this connection that the energization of magnet 17 is effected without affecting armature 17 be- I cause at such time said armature is engaging contact 17 This result is desired for the purpose of extending or increasing the lapse of time between the first and second c-om pletions of the telegraphic circuit for the production of a space, as hereinbefore suggested, between the character (0). The energization of magnet 1 3S eifects the attraction of 38 to 38 and completes the following circuit: from 65 and second dots of the character (O), The

dots constituting Morse through 66, 106, 39, 107, 64, 63, 33 33 138 and 123 back to 65 thus energizing magnet 39, which attracts 39 to 39 and com pletes the following circuit: from 65 through 66, 49 4 97, 19 19-, 96, 20 20, 95, 21 21, 94, 22 22, 93, 23 23, 92, 24 24, 91, 39 ,39 139 and 123 back to 65. This energizes 4 which attracts 4 to 4 and completes a circuit through 17 which is substantially the same as original circuit through said magnet exceptthat the part passes through the dot character armature 4 and its connections instead of through the dot character armature 6 and its connections. The circuit completed by the energization of magnet 4 is therefore to effect the second closure of the main line of telegraphic circuit and is as follows: from battery 65 through 66, 17 67, 75, 4, 4 146, 1 and thereby returning armature 1 to its original or normal position, 149, 12*, 150, 125, 124, 34 and 123 back to the battery. This circuit effects the energization of magnet 17*. which attracts armature 17 to contact 17" and thus closes the main line or telegraphic circuit for the second time. The completion of said circuit is immediately followed by the flow of current from battery 65 through 66, 162, 35, 161, 34 34 160 and 123 back to the battery. This circuit energizes magnet 35 which attracts its armature 35 to 35 and thus completes a circuit from battery 65 through 66, 165, 17 164., 35 35 163 and 123 back to the battery. This circuit energizes magnet 17 which completes the second dot by reattracting armature 17 and thereby reopening the main line or telegraphic circuit.

The character (N) represented in the Morse code by a dash followed by a dot, is

I produced by depressing the key N and thereby causing swing-plate 56 to engage yielding contact 56 and swin -plate 47 to engage contact 47. As a result of such engagements, current fiows from battery 109 through 56*, 56, 56 13 119 and 111 back to said battery. This current energizes magnet 13 which attracts its armature 13 into engagement with contact 13" against the re sistance of the permanent magnet, which tends to hold the armature in its new position. The circuit completed by the engagement of plate 47 with 47 is as follows: from battery 109 through 47, 47 6 112 and 111 back to the battery 109. The attraction of armature 13 as explained is to complete the following circuit: from battery through 66, 17 which attracts armature 17 and thereby closes the main line or telegraphic circuit, 67, 73, 2, 2 77 19 which attracts its armature 19 into engagement with contact 19 80, 20 81, 6, 6 148, 3 153, 14 13, 13 134 and 123 back to the battery 65. The completion of this circuit resultsin completing the first circuit through the retarding mechanism as follows: from battery 65 through 66, 98, 38, 99, 77, 19 80, 20, 81, 6, 6 ,148,3 ,153, 14*,154, 13, 13 and 123 back to the battery 65. This attracts armature 38 to 38* and completes the following circuit: from battery 65 through 66, 106, 39, 107, 64, 63, 33 33 138 and 123 back to the battery. This circuit energizes magnet 39 which attracts armature 39 to contact 39 to complete the following circuit: from 65 through 66, 43 5 145, 19 19, 96, 20 20, 95, 21 21, 94, 22 22, 93, 23 23, 92, 24 24, 91, 39 39 139 and 123 back to the battery 65.

From the foregoing it will be seen that by the operation of the dash-character armature 13, the main line or telegraphic circuit is kept closed the proper length of time to transmit a dash, by cutting magnets 34, 35, and 17 out of circuit with battery 65.

The energization of magnet 5 attracts 5 to 5"" and completes the following circuit: from 65, through 66, 17 67, 74, 1, 1 78, 19 which breaks the former circuit by moving 19 from 19 to 19" 79, 5, 5 147, 2 151, 13 which attracts its armature back into engagement with 13*, 152, 12, 12 128,

125, 124, 34 and 123 back to battery 65. This circuit results in the energization of 34 which causes 34 to engage 34 and thus complete a circuit as follows: battery 65, 66 162, 35, 161, 34 34 160 and 123 back to the battery. The energization of 35 causes 35 to engage 35 and completes the following circuit? battery 65, 66, 165, 17 which attracts armature 17 and thus completes the dash by opening the telegraphic circuit, 164, 35 35, 163 and 123 back to the battery. At about the same time the tele I graphic circuit is thus broken circuits are successively completed as before traced, through the retarding mechanism the final circuit therethrough energizing the final electromagnet 4*, which attracts its armature into engagement with contact 4*, and this completes a circuit from battery 65 through 66, 17 67, 75, 4, 4 146, 1 ,149, 12 ,150,125, 124, 34, and 123 back to the battery. This circuit results in energizing 17 b and the consequent reclosure of the main line circuit to start the production of the dot of character N. It also energizes 34 which attracts its armature and closes a circuitpreviously traced through 35which in turn energizes its armature and closes another circuitpreviously traced through 17 ,which in turn effects the reopening of the telegraphic circuit and the consequent completion of the dot of the character N.

'lhe word on was selected because it is one of the shortest and at the sametimeinvolves the use of all three characters of the Morse code, Viz., the dot, the dash and the season space, and therefore brings into operation one or more of'the dot, dash and space-character armatures.

From the above description in connection with the drawings, it will be apparent that I have produced a key-board telegraph system embodying the features of advantage enumerated as desirable and I wish it to be under stood that I reserve the right to make such changes as properly fall within the spirit and scope of the appended claims.

Having thus described the invention what I claim as new and desire to secure by Letters Patent, is s 1. In a keyboard telegraph system, a telegraphic circuit, a transmitter armature in and adapted toalternately close and open such circuit, a closing magnet for said armature, a source of electric energy in electrical connection with the closing magnet, a second magnet in electrical connection with the first and'the source of electric energy, an opening magnet for the transmitter-armature electrically connected to the source of electric energy, means to close and open the circuit through the closing magnet and said second magnet, and means whereby the closing ofthe circuit through said closing ma net and said second magnet shall effect the c osing of thecircuit through the opening magnet.

2. In a keyboard telegraph system, a telegra hic circuit, a transmitter-armature in an adapted to close and open such circuit, a closing magnet for said armature, a source of electric energy in electrical connection with the closing magnet, a second magnet in electrical connection with the first and the source of electric energy, an opening magnet for the transmitter-armature electrically connected to the source of electric energy, means to close and open the circuit through the closing magnet and said second magnet, means whereby the closing of the circuit through said closing magnet and said second magnet shall effect the closing of the circuit through the opening magnet, and a permanent magnet to hold the transmitter-armature yieldingly open or closed.

3. In a keyboard telegraph system, atelegraphic circuit, .a transmitter-armature in and adapted to close and open such circuit, a closing magnet for said armature, a source of electric energy in electrical connection with the closing magnet, a second magnet in electrical connection with the first and the source of electric energy, an opening magnet for the transmitter-armature electrically connected to the source of electric energy, means to close the circuit through the closing and sec ond magnets, means to break such circuit, and means whereby the closing ofsaid circuit shall effect the energizationof the opening. magnet.

4. In a keyboard telegraph system, a telegraphic circuit, a transmitter-armature in and adapted to close and open such circuit, a closing magnet for said armature, a source of electric energy in electrical connection with the closing magnet, a second magnet in electrical connection with the first and the source of electric energy, an armature and a contact for the second magnet, a third magnet in electrical connection with said armature and contact, an armature and contact for the third magnet, an opening magnet, and connections whereby the engagement of the contact and armature of the third magnet shall effect the energization of the opening magnet.

5. In a keyboard telegraph system, a telegraphic circuit, a transmitter-armature in and adapted to alternately close and open such circuit, a closing magnet for said armature, a source of electric energy in electrical connection with the closing magnet, a second magnet in electrical connection with the first and the source of electric energy, an opening magnet for the transmitter-armature electrically connected to the source of electric energy, means to close and open the circuit through the closing magnet and said second magnet, means whereby the closing of the circuit through said closing magnet and said second magnet shall er'lect the closing of the circuit through the opening magnet, and means adapted to be thrown in circuit with said source of electric energy for increasing the length of time elapsing between closures of the telegraphic circuit by t 1e transmitterarmature.

6. In a keyboard telegraph system, a telegraphic circuit, a transmitter-armature in and adapted to alternately close and open such circuit, a closing magnet for said armature, a source of electric energy in electrical connection with the closing magnet, a second magnet in electrical connection with the first and the source of. electric energy, an opening magnet for the transmitter-armature electrically connected to the source of electric energy, key-actuated means for effecting the closure and opening of the circuit through the closing magnet, and means whereby the closing of the circuit through said closing magnet and said second magnet shall effect the closing of the circuit through the opening magnet.

7. In a keyboard telegraph system, a telegra hic circuit, a transmitter-armature in anc adapted to alternately close and open said circuit, a closing magnet for said armature, a source of electric energy, a magnet electrically connected to the closing magnet, an opening magnet for sail transmitter-armature, a series of dot-character armatrres, a corresponding series of magnets therefor, a series: ofcontacts to be engaged by said dotcharacter armatures when attracted by their respective magnets, and suitable electrical connections whereby the attraction of one of the dot-character armatures by its magnet, to its respective contact shall result in the energization of the closing magnet and of the magnet electrically connected thereto and through the energization of the latter the closing of the circuit through the opening magnet to eifect the reopening of the telegraphic circuit.

8. In a keyboard telegraph system, a telegraphic circuit, a transmitter-armature in and adapted to alternately close and open said circuit, a closing magnet for said armature, a source of electric energy, a magnet electrically connected to the closing magnet, an opening magnet for said transmitter-armatures, a series of dot-character armatures,

a corresponding series of magnets therefor, a series of contacts to be engaged by said dot-character armatures when attracted by their respective magnets, a second source of electric energy, and electrical connections for closing and opening the circuit through the last-named source of electric energy and one of the dot-character magnets to attract and release its armature to cause the same to make and break a circuit through the first source of electric energy and the closing and opening magnets respectively.

9. In a keyboard telegraph system, a telegraphic circuit, a transmitter-armature in and adapted to alternately close and open said circuit, a closing magnet for said armature, a source of electric energy, a magnet electrically connected to the closing magnet, an opening magnet for the transmitter-armature, a series of dot-character armatures, a corresponding series of magnets therefor, a series of contacts to be engaged by said dotcharacter armatures when attracted by their respective magnets, a second source of electric energy, electrical connections for closing and opening the circuit through the lastnamed source of electric energy and one of the dot-character magnets to attract and release its armature to cause the same to make and break a circuit through the first source of electric energy and the closing and opening magnets respectively, and means adapted when in circuit with the first-named source of electric energy for increasing the length of time elapsing between closures of the telegraphic circuit by the transmitter-armature.

10. In a keyboard telegraph system, a telegraphic circuit, a transmitter-armature in and adapted to alternately close and open said circuit, a closing magnet for said armature, a source of electric energy, a magnet electrically connected to the closing magnet, an opening magnet for said transmitter-armature, a series of dot-character armatures, a

the second source of electric energy, and electrical connections whereby the attraction of its armature by the energized magnet of the second series of space-character magnets shall cut the closing magnet out of circuit with the first-named source of electric energy to produce a space in the main telegraphic circuit.

11. In a keyboard telegraph system, a

telegraphic circuit, a transmittenarmature in and adapted to alternately close and open said circuit, a closing magnet for said armature, a source of electric energy, a magnet electrically connected to the closing magnet, an opening magnet for said transmitterarmature, a series of dot-character armatures, a corresponding series of magnets therefor, a series of contacts to be engaged by said dot-character armatures when attracted by their respective magnets, a series of space-character armatures, a corresponding series of magnets and contacts therefor, a second series of magnets for the space-character armatures, a second source of electric energy in circuit with said second series of space-character magnet and the dot character magnets, means to close an electric circuit through one each of the last-named sets of magnets from the second source of electric energy, and connection for effecting the successive reenergization of the said closing and opening magnets.

12. In a keyboard telegraph system, a telegraphic circuit, a transmitterarmature in and adapted to alternately close and open said circuit, a closing magnet for said armature, a source of electric energy, a magnet electrically connected to the closing magnet, anopening magnet for said transmitterarmature, a series of dot-character armatures, a corresponding series of magnets therefor, a series of contacts to be engaged by said dot-character armatures when attracted by their respective magnets, a series of dash-character armatures, a corresponding series of magnets and contacts therefor, a second series of magnets and contacts for the dash-character armatures, a second source of electric energy in circuit with the said second series of dash-character magnets and dotcharacter magnets, means to close an electric circuit through one each of the last-named source of electric energy to produce a dash in sets of magnets from the second source of the main telegraphic circuit. 10 electric energy, and electrical connections In testimony whereof I afiix my signature, whereby the attraction of its armature by the in the presence of two witnesses.

energized magnet of the second series of dash- CHARLES K. JONES. character magnets shall cut the said arma- Witnesses: ture electrically connected to the closing H. C. RODGERS,

magnet out of circuit with the first-named G. Y. THORPE.

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