US2165237A - Communication system - Google Patents

Description

July 11, 1939. R, DOTY- 2,165,237

COMMUNICATION SYSTEM Filed Dec 23, 1936. 2 Sheets-Sheet 1 a; Flt-3.3.-

9 i? 12 9 Q 12 1 I 21 ea 1&

" lNVENTOR 20 Mfi? ATTORNEY July 11, 1939. c. R DOTY COMMUNICATION SYSTEM Filed Dec. 23, 1 956 2 SheGts-Shqet 2 FIGA.

TINVENTOR AfToRNEY Patented .Iuly 11', 1939 UNITED STATES COMMUNICATION SYSTEM Charles R. Doty, Binghamton; N. Y., assignor to International Business Machines Corporation, New York, N. Y., a corporation of New York Application December 23, 1936, Serial No. 117,269 I 9 Claims-1 (01. 178-79) of the character signals- An object of the present invention is to provide signal storing means which are operated alternately by the character keys so that one group of said'storing means may be energized during the timed interval the othergroup of storing means is effective to impart the stored signal to the transmission line.

Various other objects and advantages of the invention will be obvious from the following par-v lli ticular description of one form of mechanism embodying the invention or from an inspection of the accompanying drawings; and the invention also constitutes certain'new and useful features of construction and combination of parts hereinafter set forth and claimed.

In the drawings: V i

Fig. 1 is a fragmentary sectional view of one type of tele-typewriter.

Fig. 2 is a detail view of .a controlling clutch.

Fig. 3 is a schematic circuit diagram embody ing one form of the invention.

Fig. 4 is a modified circuit diagram embodying another form of the invention.

Referring to the drawings, and in particular to Fig. 1, one type of tele-typewriter is shown and in the embodiment illustrated in the drawings, well known means are provided for actuating the type bars (not shown) by power operated devices comprising a power driven'roller l0.

A cam" I l is pivoted on one arm of a bell crank lever l2 pivoted in the frame, the other arm of which is operatively connected with one arm of a 'belP crankiever l3 by means of link I4. The other arm of lever I3 is connected to the type bars (not shown) in a well known manner and 1 fully disclosed'in the aforesaid application.

The lever I2 is actuated by the cam II when the latter engages the driven roller I 0 to be operated thereby. The engagement of the cam ll with'the power roller is controlled by means of pressed arm 20 which tends to turn it into engagement with the power driven roller or stop H on' a lever 22 pivoted on the bell crank l2 and normally arranged in the path of a lug 23 on the cam. When the, lever 22 swings to move its stop out of the path of the lug, the arm 20 swings 5 the cam into engagement with the power roller to be actuated thereby to wine the bell crank I: to actuate its connected mechanism.

The lever 22 has anarm 24 which is providedwith an offset projection 25 at its end which projects laterally through an opening in the bell crank l2 and engages the bifurcated lower end 26 of an arm 21 of a key lever I'I pivoted on the common rod 28.

It is obvious then that depression of a key lever l'l releases the revolubly mounted cam .H to engage and be actuated by power roller It] in turn operating bell crank 12 and its attached links to cause the associated mechanism, such as the key bars and other operating mechanisms, to be operated.

In addition to actuating the several type bars and connected mechanisms, the revolubly mounted cams are adapted to make and break circuits which may be employed in the transmitting units by operating the associated group of contacts indicated at 30, the purpose of which will be understood as the description progresses.

It will be understood that the usual number of key bars and power devices with their associated mechanisms are provided, but only one of them is shown for the sake of clearness.

Referring now to Fig. 3, the operation of the impulse storage device will nowbe explained. A rotary distributor 3| is shown and provided with a plurality of conducting segments 32 which are traversed by a continuously rotated brush 83, and

a common conducting ring 34 which is connected to one side of the transmission line. A similar rotary distributor is provided at the receiving estareceiving circuit forms no part of the invention,

and thesystem as a whole based on the Baudot type of system which is well known in the art,

it is believed that further description thereof is not necessary in the present instance. The combinational code signal impulses are initiated by the various cam operated group of contacts 30, 3ll--a, etc. An additional pair of contacts is provided in each said group of contacts, for example,

, contacts 30-l and 30-2. Let it be-assumed that a corresponding key bar I! is depressed to oper-'. ate the said group of contacts 30l to G'momentarily.

A circuit is then established through the oper ated contact 30-4 from the positive terminal of battery 35, contacts 3lli, conductors 36 and 31, magnet coil 38, conductor 39 to the negative terthe'high portion ofthe cam wheel tomalntaincontacts 41 closed and contacts, open. Energi-z zation and deenergization again of the said coil is then effective to position the cam wheel 50 that the follower arm 46 rests on the low portion of the cam wheel to close contacts 48 and open contacts 4I. A plurality of'contacts is provided to be operated by the said cam wheel and are shown as indicated by the reference, characters 41-1 to 8 and 48-4 to l I Continuing now-with the assumed example, the

circuit established through contact M4 was just traced and describedto energize the magnet coil 3B, but ineifective at the present moment to operate the associated contacts 41 and 48. A circuit through contact -2 is also established from relays 12-2, 12-3 and l3-5 are enermzed and holding circuits established therefor through contacts 14-2, 14-3 and 14-5 and the conducting segment of conducting ring 53. Energizatlon of the said relays in addition to operating the said contact I4, also operates thecontacts IT-l,

11-2, II-3, and II-5.

I It'was mentioned that the distributor 33 and gear 58 are rotated continuously, and that upon energization of the magnet H the dog 55 (Fig. 2) is released; however, the shaft 52 is not brushes rotated until a predetermined point in the disi the positive terminal of battery 35 .to conductor 49, contact 48-6, conductor 50, clutch magnet 5!, common return conductor 39 to battery 35, energizing-the said clutch magnet 5!, thereby effecting rotation of shaft 52 and the conducting rings 53 to 58, secured thereto.- Any well known magnet is deenerg'ized, the stop 5| ispositioned coupling means may be employed torotate the shaft 52, one form thereof', shown in Fig. 2, comprising .an armature 59 associated with the magnet 5l,said armature provided with an extension arm and stop 6|, so that when the .in the ,path of the fingers 62 and 53 which protrude from the dog supporting member 54 and I dog respectively The said member 54 is secured to the .shaft52 and pivotally supports the dog65. A single tooth driving gear 66 is rotatably mounted on the shaft 52 and has secured thereto agear 61 adapted to engage the gear 63' mounted .on shaft 69., The shaft 59 which drives'the gear 56 continuously may be thesame shaft supporting and driving the transmitting distributor brushm 33. It is seen from the description just set forth that upon-"energization of magnet 5|, the pivoted armature 53 is attracted and rotated partially in'a counterclockwise direction so as to release-the said fingers 62 and 63 permitting the spring-actuated dog 65 to engage thegear 55 and the single tooth therein when advanced to the dog thereby rotgtiszg the shaft 52 and the conducting rings 53 Continuing with the assumed example, another circuit is established through contact 30-3 from the battery 35-.to conductor I0, contact 43-l,- conductor'll, coil of relay 'I2-l and common conductor I3 to the said battery energizing said relay. Through the associated contact 'I4-l', now closed, a holding circuit is established from battery 35, conductor I5, conducting segment 53,-l

of rlng'5 3, conductor", contact 14-], coil of relay 12-] and conductor I3 to battery 35 mainlatedsegment 53-2 engages the associated tributor brush cycle is approached; that is, before the brush 33 completely traverses the segment 32-6, the single toothof gear is advanced so that the released dog can engage the tooth to rotate the shaft 52 and conducting rings 53 to. It is to be noted that the brushes associated with conducting rings 54 to 58 normallyengage the insulated segments of the said rings and not until the rings are rotated. are the conducting portions of the rings engaged. Asthe distributor brush 33 engages the segment 32-I, the brushes associated with rings 54 to 58 engage theconducting segments thereof so that the character signal impulses are transmitted to the line inaccordance with the operated relays 12-! to 5,

namely, in the assumed example, relays II-l, IE-2', IZ-4 and 12-5 are energized, operating the contacts I'I-l, II-2, IT-3, and ll-5, permitting signal impulses to be imparted to the line as the distributor brush traverses segments 32-l 32-2, 32-3 and 32-5. Immediately after the brush 33 traversed the segment 32-5, the insulated segment 53-2 of ring '53 engages the associated brushes to open the described holding and immediately thereafter the insulating segments of the rings 54 to 58 engage the associated brushes. Also at this same time, the dog 65 is released fromthe driving gear 64 due to the positioned armature 59 which as mentioned is in the path of the tails or fingers 62 and 63 to efiect disengagement of the clutch in a mannerwell known. 1

The said cam actuated contacts 35 are closed for a short timed interval, therefore, immediately after the cam completed its half revolution, the magnet 33 is deenergized to step ahead thecam wheel 43 to operate the'contacts 41 and 48. Concircuits for relays 12-1, 12-2, 72-3 and 12-5,

tinuing with the assumed example, upon deenergization of the magnet contacts 4] would now be closed and contacts 48 opened. It is seen therefore that the contacts 30 are now connected to contacts- 4l-l to 5 and upon depression, let us say, of the same key'bar to operate contacts- 3ll-I. to 5, relays 80-2, 33-3 and 35-5 are operated, in addition to the energizationof magnet 38 and clutch magnet 8|. Operation of clutch magnet BI is effective to start rotation of the shaft 88 and the conducting rings 82 to 81 in'exactly the same manner as just described,- I

said shaft and rings operated in the same timed relation with the distributor brushes 33, so that the relays Ill-l 30-2, 80-3 and 33-5 are maintained to store the combinational character impulses and later imparted to the line as the disbrushes 15a connected to. conductors I5 and I3 to break the said holding clrcuit.

' Similarly, through the contacts 35-4, 33-5,

" and30-3 and contacts 43-2, and 43-5,

tributor brush 33 traverses the segments 32.

The relays I2 and 30 are energized in oombisignals to the line, the'other group of relays canbe energized to set up" the character to be stored, thus effecting a faster rate of transmission of the character signals.

Referring now to Fig. 4, an impulse storage system similar in principle to the one just described is shown; however, the groups of condensers 90 and 9! are used in place of the group of relays l2 and 80 shown in Fig. 3. The principle of operation is exactly the same as set forth hereinabove so that the following brief description of operation is believed to be sufficient. Let it be assumed that the character key bar to operate the group of cam controlled contacts 30l to 0 is depressed. A circuit through contact 30-4 is then established to energize the magnet 30, the

group of transfer contacts 41 and 43 are not op-' erated at this moment, but only upon deenergization of the magnet. Through contact 30-2 a circuit is established to energize the clutch magnet 5l to effect rotation of the shaft 52 and conducting rings 53 to 58. Through contact 30--3 a circuit is established to charge condenser 90-1. The holding circuits described hereinbefore are dispensed with; therefore, it is to be noted that conducting ring 53 is normally positioned so that .the insulating segment engages the associated brushes and is effective only to provide a discharge path for the group of condensers. Similarly, condensers. '90-2, -3 and 30-5 are charged. Upon opening of the contacts 30-4 to 8, the transfer contacts 01 and 43 are operated and clutch magnet'5i is deenergized to position the associated armature stop in the path of the clutch dog. The said -clutch engaged as the brush 33 traversed the latter section of segment 32B effecting rotation of the rings 53 to 58 to provide discharge paths for the individual condensers charged so that upon traversing the individual distributor segments 32, the brush 33 completes the individual discharge paths to energize the output transformer 96 and thereby imparting the combinational impulses to the transmission line. Upon depression of the said key again the group of condensers 3| are charged :in a

similar manner to be discharged at a later interval as the distributor brush completes the individual discharge paths to impart the stored signals to the said transmission line.

While there has been shown and described and pointed out the fundamental novel features of the invention as applied to a single modification,

it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention. It is the intention therefore to be limited only as indicated by the scope of the following claims.

What is claimed is as follows:

1. A communication system of the character described comprising, in combination, means to initiate character signal impulses, distributor means to impart character signals to a transmission line, groups of impulse storing means, and means controlled by the initiating means to connect alternately the groups of the storing means with the said initiating means and distributor-means.

2. A communication system of the character described comprising, in combination, means to initiate character signal impulses, distributor means to impart signals to a transmission line, a predetermined number of circuits associated with said distributor means, groups of signal storing means, and means controlled by the initiating means to connect said storing means alternately with the said predetermined number of circuits to effect transmission of the character signals initiated.

3. A communication system of the character described comprising, in combination, means to initiate character signal impulses, distributor means to impart signals to a transmission line,

groups of signal storing means, and circuit controlling means connecting the said storing means and distributor means, said circuit closing means controlled by the initiating means effecting trans- .mission of the character signals initiated.

4. A communication scystem of the character described comprising, in combination, means to initiate character signal impulses, distributor means to impart signals to a transmission line,

"groups of signalstoring means, and circuit controlling means controlled by the said initiating -means and operated in a predetermined timed relation with respect to said distributor means to connect the said storing means and distributor means effecting transmission of the initiated character signals.

5. .A communication system of the character described comprising, in combination, means to initiate character signal impulses, .distributor means to impart signals to atransmission line,

groups of signal storing means, circuit controlling means controlled by the initiating means connecting the said storing means and distributor means, and means to connect alternately said storing means with the said distributor means to effect transmission of the character signals initiated; 1

6. A communication system of the character described comprising, in combination, means to initiate character signal impulses, distributor means to impart the signals to a transmission line, groups of impulse storing means comprising electrostatic devices and means controlled by the initiating ,means to connect alternately the groups of said devices with the said initiating means and distributor. means.

7. A communication system of the character described comprising, in combination, means to initiate character signal impulses, distributor means to' impart the signals we. transmission line, aplurality of impulse storing means, and means controlled by the initiating means to con' nect certain of said storing means alternately with the said initiating means and distributor means.

8. A communication system of the character described comprising, in combination, means to .initiate character signal impulses. distributor means to impart the signals successively to a transmission line, a plurality of impulse storing means comprising condensers, and means controlled by the initiating means to connect certain of said condensers alternately and periodically with the said initiating means and distributor means.

9. A communication system of the character described comprisin in combination, means to initiate character signal impulses, distributor means to impart the signals successively to a transmission line, a plurality of impulse storage relays, and means controlled by theinitiating means to connect certain of said relays altemately andperiodically with the said initiating means and distributor means.

, CHARLES R. DOTY.

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