US2355281A - Transmission system for statistical data - Google Patents

Description

Aug. 8, 1944.

A. H. DI CKINSQN TRANSMISSION SYSTEM FOR STATISTICAL DATA Filed Feb. 3, 1939 6 Sheets-Sheet 1 Aug. 8, 1944. A. H. DICKINSON I TRANSMISSION SYSTEM FOR STATISTICAL DATA Filed Feb. 3, 1939 6 Sheets-Sheet 2 IEVEggR Y MW ATTORN EY Aug. 8, 1944.

A. H. DICKINSON 2,355,281

TRANSMISSION SYSTEM FOR STATISTICAL DATA Filed Feb. 3, 1939 6 Sheets-Sheet 3 IEVEg OR ATTORNEY Aug. 8, 1944. A. H. DICKINSON TRANSMISSION SYSTEM FOR STATISTICAL DATA Filed Feb. 3, 1939 5 Sheets-Sheet 4 A \W\ 1 Nu a .1 mm

5% 1 Q NQBA N V m S a Q E am BY lNzENy'fij ATTORNEY 1944- A. H. DICKINSON 2,355,281

TRANSMISSION SYSTEM FOR STATISTICAL DATA Filed Feb. 3, 1939 6 Sheets-Sheet 6 I-Mr- 7 FIG. 80..

l-Pr- 1-77 ENTOR ATTORNEY Patented Aug. 8, 1944 2,355,2s TRANSMISSION srg' s ig Fort STATISTICAL Arthur H. Dickinson, Bronxvilic, N. Y., mimito International Business Machines Corporation. New York, N. Y., a corporation of New York Application February 3, 1939, Serial No. 254,410

16 Claims.

This invention relates to transmission systems for statistical data and, more particularly, to

systems of ,the type wherein data accumulating and recording units are provided at a secondary station to be operated in accordance with data transmitted from a primary station.

It is the general object of the instant invention to provide novel means for transmitting concurrently a plurality of orders of statistical data to a distant point over a single transmitting medium.

A more specific object of the invention resides in the provision for columnar separation of a plurality of columns of data to be transmitted by assigning a different frequency to each column.

Another object is to provide means for effecting digit separation in accordance with differential time while attaining columnar separation of the data in accordance with different frequencies.

Still another object of the invention is to provide a method for setting up a substantially complex wave comprised of frequencies representative of different columns of statistical and control data, which wave is transmitted and then broken down into its component parts to effect entry into; and operation of, accumulating and recording units of an accounting machine.

A further object is the provision of means whereby different frequencies are used to distinguish one column of data from another irrespective of the differential time at which these columns may be rendered effective.

Astill further object resides in the provision of means whereby the substantially complex wave is superimposed on a carrier wave and upon original data appearing in a record during the transmitting .period and means for reforming the data after transmission for proper control-of and entry into a distantly located accounting machine in the same arrangement and denominationalrelationship as the original data.

It isalso within the contemplation of the invention to provide record control of the operations era distantly located accounting machine in thein'proper sequence by signals of different frequencies. q r

" It is further contemplated to provide automatic group control means by which the component parts of a complex wave are compared with control 'indicia appearing on records to effect control of both transmitting and receiving units in accordance with record groups.

An additional object resides in the provision whereby like frequencies are established for corresponding columns of records presented successively at a sensing station and automatic group control means compares the time at which like frequencies are established on successive record cards to control accumulating, total taking, and resetting operations of an accounting machine at a distant point.

In the usual electrical tabulating and accounting machines, the general circuit pattern comprises a single circuit extending to an analyzing unit where the record card, by its passage therethrough and the data indications it bears, causes a number of parallel circuits to be completed to the automatic group control, accumulating, and recording units, the parallel circuits thereupon combining over a single circuit for the return to the source of power supply. According to the present invention, however, a plurality of sources,

of energy are provided and are combined into a complex wave under record control to be transmitted over a single medium-whereupon the ori inal plurality of electrical characteristics are reformed for the control of accumulating and recording units. The fact that a single carrier medium rather than parallel circuits is utilized becomes particularly advantageous where the accumulating and recording units of an accounting machine are remotely located with respect to its record feeding and analyzing unit. It is to be remembered, nevertheless, that the present invention is equally applicable to an accounting machine of the usual structure.

Other objects of the invention will be pointed out in the following description and claims and illustrated in the accompanying drawings, which disclose, by way of example, the principle of the invention and the best mode, which has been contemplated, of applying that principle.

In the drawings:

Fig. l is an outside view of the record feeding and analyzing mechanism showing the card feed and reset clutching devices, which mechanism is located at the transmitting station.

Fig. 1a is a detail section on line la-ia of Fig. 1.

Fig. 2 is a detail view of the controlling devices of the accumulator resetting mechanism at the receiving station.

Fig. 3 is a central section of the printing mechanism at the receiver.

Fig. 4 is a detail of an impulse emitting commutator associated with the printing mechanism.

Fig. 5 is a plan sectional view showing the main driving and operating mechanism for the printing unit.

Fig. 6 is a view of one order of the accumulator.

Fig. 7 is a representative diagram of the circuits associated with the transmitter.

Fig. 7a is a diagram of the circuits at the receiver.

Fig. 8 is a timing chart of the circuit closing devices utilized in the circuits at the transmitter.

Fig. 8a is a timing chart of the circuit closing devices employed in the receiver circuits.

The machine to which the features of the present invention are applied is similar to that shown in the U. S. Patent #1,976,617, issued to C. D. Lake and G. F. Daly on October 9, 1934. That patent illustrates and explains in more extensive detail the manner of organization and mode of operation of the various units of a well known type of accounting machine. In the present application, these units will be explained in only as much detail as will be necessary to point out the manner in which the objects of the present invention may be realized.

Before setting forth the general operation of the machine, the various mechanical units will be described and their relationship pointed out thereafter.

Card feeding mechanism The card feeding mechanism shown in Fig. l is identical with that shown and described in the aforementioned patent except that provision is made in the form of a clutching device for interrupting the card feeding operations without stopping the main drive shaft. As 'described in the said Lake and Daly Patent 1,976,617, the main drive shaft, which is the shaft I I in the patent. is normally held stationary in a certain angular position, known in the art as the "D" position. Upon energization of a solenoid, it is released and clutched to a constantly running pulley member. Similar arrangements are utilized in accordance with the present invention to start the main drive shafts of the independently located card feeding and manifesting mechanisms from corresponding D positions at the same instant, by clutching them simultaneously to twosynchronized motor drives, in a manner to be explained.

The analyzing brushes are indicated at U13 and LB, and a stack of record cards R are successively advanced by picker 9 to pairs of feed rollers In which serve to advance the cards past the upper and lower brushees U13 and L8 in succession. The shafts upon which rollers it are mounted are provided with gears at their extremities, arranged as shown in Fig. l for operation by a main driving gear I I which is freely mounted upon a shaft 8 and which has connection with an arm l5 through a sleeve 1 (Fig. 10). Arm II carries a spring-pressed clutching dog I! normally held in the position shown by an armsture latch I! which is adapted to be controlled by clutch magnet I8. Between gear II and arm I5 are located gear I! and clutch driving disc ll freely rotatable upon the sleeve I. Gear II has connection generally designated II with main drive shaft 8 which is in operation as long as it is clutched to the main driving pulley, as described in the Lake and Daly Patent 1,976,617. Energization of magnet it causes dog $9 b9 tripped into engagement with disc H, and the card feeding mechanism thereupon causes the records '1' to be advanced past the brushes U13 and LB. Card feeding operations continue as long as magnet It remains energized.

During total taking cycles of operation to be explained later, magnet II is deenergized and thus card feeding will not take place during such cycles.

Printing mechanism The printing mechanism is shown in Fig. 3

' where type bars are carried by cross-head 2| which is slidable vertically on rods 22. Springpressed arms 23 pivoted to the cross-head at 24 have their free ends butting the lower extremity of the type bars so that, as the cross-head moves upwardly, the type bars are urged in the same direction. cross-head is controlled from shaft I9 corresponding to shaft I! of Fig. 1, the latter being continually driven from the main operating shaft 0 at the transmitter, whenever the main clutch is engaged, and the former being driven from a corresponding shaft (not shown) at the receiver which is kept in synchronism and constant phase relationship to shaft i in a manner to be described hereinafter. Shaft I! has secured thereto a clutch driving element 25-notched to cooperate with a clutching dog 26 carried by and pivoted to listing cam 21. Clutch releasing arm 20 cooperates with dog 26 to hold the parts in the position shown when magnet 29 is deenergized. Energization of magnet 29 causes arm 2! to rock in a counterclockwise direction releasing dog 2 for engagement with element 25 whereupon the listing cam rotates with shaft l9 and, through follower arm Ill, effects the rocking of shaft ll.

Secured to shaft ii are arms 32 whose free ends have link connection to the cross-head 2| causing the latter to be reciprocated once for each revolution of the listing cam. As the type bars move upwardlly, the type elements 33 successively pass the printing position opposite platen 34 and ratchet teeth 25 successively pass the toe of the stop pawl 36. Energization of printing magnet 11 effects the tripping of latch 38, permitt ng stop pawl 26 to engage one of the ratchet teeth 35 and thus positioning the corresponding type element opposite the platen.

Associated with each type bar 20 is a springpressed printing hammer l0 pivoted at II. The hammer normally rests against an operating ball 42 also pivoted at H, the bail being operatively connected to a tripping member 43 which is biased in a counterclockwise direction by a spring 44. The lower extremity of one arm of member 43 is in latching cooperation with an arm 45 pivoted at I to the cross-head operating lever 32. As the lever 32 is rocked in a clockwise direction to elevate the cross-head 2| and the type bar 20,

the pivot 46 is moved upwardly therewith and causes the tripping member 43 to be rocked clockwise against the action of spring 44. The connection between the ball 42 and the member I! is such that the bail is rocked counterclockwise away from the type elements 33. As the lever 32 reaches its utmost extremity of travel, a pin 41 carried by arm ll brinfls about the release of the tripping member I! so that the latter is rocked rapidly in a counterclockwise direction by the action of spring 44. The hammer bail 42 is concurrently rocked in a clockwise direction against the hammers 4| causing the latter to The reciprocating movement of the strike the type elements 38 which are in a printshown and described in patent referred to and the description thereof will accordingly be limited to a brief explanation of its manner of operation. The accumulator drive shaft 88 (Fig. 6) is geared directly to the main drive shaft at the receiver (not shown) which corresponds to, and is kept in synchronism and constant phase relation with shaft 6 at the transmitter (Fig. l).-

The angular relationship between the teeth on the main clutch ratchets and the armatures oi the synchronous motors TM and TMr is initially established by timing marks on the respect ve elements. The ratchets have a tooth for each possible angular position at which they may be pulled into synchronous speed. Thus, if the enga ing pawls of the clutches are tripped slightly ahead of the tooth in which they are to engage, a slight variance in the tripping time will not cause any detrimental effect in view of the fact that they are engaged at the same instant by the driving faces of the next ratchet teeth. Shaft I is thus kept in operation as long as the driving motor at the receiver is clutched thereto and the is provided for each denominational order of the accumulator. The element 84 is provided with a roove in which fits the short arm of a lever 55 pivoted as shown and having a block 58 normally v held as in Fig. 6 by armature latch 51 of an adding magnet 50. A leaf spring 69 bears against the extremity of the longer arm of lever 58 and moves the same in a counterclockwise direction upon release of block 56 by armature t1. This movement brings clutching member 54 into engagement with cooperating teeth Gil which are integral with a gear I loosely mounted on shaft 53. Gear II, when thus coupled to shaft 53, causes the rotation of a gear 82 meshing therewith and consequently the displacement of accumulator index wheel 63. The rearward extremity of member 55 is adapted to be engaged by a finger 6| toward the end of the cycle for the purpose of disengaging the clutch element 54 from teeth ill and relatching block 58 on armature 51.

Briefly summarizing the adding operation, it is noted that magnet 58 may be energized at various points in the cycle of the machine, depending upon the location of a data indication in a column of the record card being analyzed by the lower brushes LB. This energlzation may occur in response to a digit indication in any of the index point positions from 9 to 1 inclusive. Should a digit indication be in the 9 index point position, clutch element BI is tripped nine steps before finger B4 is operated to-declutch it. Similarly, a digit indication in the 1" index point position causes the clutch element N to be tripped one step before it is declutched by the finger N. The digit indications are customarily in the form of holes in the card. Each step of clutching arrangement corresponds to a tenth of a revolution in the accumulator index wheel 63 so that a 9" hole moves the wheel of a revolution and a 1" hole moves it of a revolution. Energization of adding magnet II also causes the closing of a pair of so-called accumulator-list contacts 58a print magnets on listing cycles which will be described later in connection with the circuit diagram.

Read-out mechanism Also driven by gear II is a gear 5. Since the ratio of gears I! and I2 is 2:1, the former will turn through a half revolution for each revolution of the latter. Carried by and insulated from Bear I is a pair of electrically connected brushes 0!, one of which cooperates successively with the conducting segments '1 while the other cooperates with an arcuate conducting strip 80.

The relationship of the parts is such that, when the index wheel N is in its zero position, one of the brushes '6 is in contact with the zero sesment 61. and the other brush is in contact with V the strip Bl, thus forming an electrical connecassociated therewith to establish circuits, to the a placed to indicate, say, 8, then one of the brushes 86 will be in contact with the "8" segment 1! and the other brush will be in contact with the arcuate strip 68.

The positioning of the brushes 66 provides a convenient electrical read-out mechanism for controlling total printing operation and the electrical circuits involved in these functions will be more fully explained with reference to the circuit diagram.

Accumulator resetting mechanism The shaft 69 (Fig. 6) upon which the index wheels 83 of an accumulator are loosely mounted is slotted for cooperation with spring-pressed pawls (notshown) pivoted upon and carried by the individual index-wheels in such manner that counterclockwise rotation of shaft 69 causes the index wheels 83 to become engaged and driven forwardly to the zero position during a single revolution of shaft 8!.

Referring to Fig. 2, shaft 65 carries a gear 10 at its extremity which is in engagement with gear H mounted upon reset shaft 12. Gear II, of which there is one for each accumulator, is coupled to the resetting shaft 12 in the well known manner more fully explained in the patent above referred to. At the extremity of shaft 12 is a gear I3 (see also Fig. 5), which is adapted to be driven by an intermediate gear I4 which is secured to shaft 15' which corresponds to shaft II shown in Fig. 1. Also fixed to shaft 15 is an arm 18' which carries a spring-pressed clutch dog 11 normally held in the position shown in Fig. 2 by a latching arm 1| supported by armature shaft 19' of magnet armature Energization of magnet I I causes dog ll to be released for engagement with clutch driving element 82'. Element 82' is integral with a gear N which meshes with a gear 04', secured upon the shaft l9 which is running constantly as long as the main drive shaft is clutched to the driving pulley. With this arrangement,'drive element I2 is in constant rotation and whenever it is desired to effect resetting of the accumulators, magnet ll is energized to provide a connection between the element 82 and the resetting sha t 12. Resetting is usually an accompaniment of total taking and, by virtue of an intermittent gear connection, occurs during the latter part of va total taking cycle after the totals have been printed.

Although there are no accumulators at the transmitter, a reset clutch is provided as shown in Fig. 1 for operating the P cams which are mounted on shaft 15 and have circuit controlling contacts associated therewith. This clutch mechanism is similar to that just described for the asoumulators at the receiver and corresponding parts at the transmitter are given the same reference characters without the primes. The clutch is engaged during a total taking cycle to cause the P cams to operate their associated contacts to control the machine during a printing cycle at the receiver. It will be noted in the timing chart (Figs. 8 and 8a) that the P and Pr cams are twocycle cams. This is for the reason that the drive ratio between the cam shaft and the drive shaft is such that these cams make only one revolution for two revolutions of the drive shaft. It is understood that the purpose of such a gear ratio is to provide sufficient time for a total printing cycle to occur. If the printing is accompanied by a reseting operation at the receiver, then both reset clutches function in unison as will be better understood upon explanation of the wiring diagram. It should be mentioned that proper speed and phase relationship of shafts l5 and are maintained, since the drive shafts II and I! at the transmitter and receiver, respectively, are operated in exact speed and phase relationship The reset magnets ti and 8| are energized at the same time in the cycle, under control of the related cam contacts, to cause driving engagement of the related clutch mechanisms 11 and '1. and TI and 82', respectively, at the same time.

Circuit controlling devices In Fig. 4 is shown a so-called emitter which co-operates with the read-out devices of the accumulator for total printing operations. Carried by a stud l5 coaxially with the shaft I5 is a pair of electrically connected brushes I, one of which contacts with conducting segments II while the other wipes over a common arcuate conducting strip 88. The brushes .6 are carried by a gear I! driven through an idler 90 from a gear SI carried by constantly running shaft IS. The emitter used for controlling total printing operations is timed so that a brush l6 successively contacts with each of the segments 81 as the corresponding type elements 33 of Fig. 3 approach printing position opposite platen 34.

A plurality of cam-controlled contacts, operable only during printing and reset cycles, are provided at the receiver, these contacts being prefixed with the letter "P" but bearing the subscript r to distinguish them from the P cams already referred to at the transmitter. The Pr cams are mounted on a shaft 92 driven from shaft 15'. Similar cam controlled devices prefixed with the letter "L" are carried by or may be driven from shaft I! at the transmitter and shaft I! at the receiver and these are in constant operation as long as the driving pulleys are clutched to the main drive shafts. The contacts associated with the constantly running cams at the receiver are provided with a subscript r to distinguish them from the L-cam contacts at the transmitter.

The usual circuit breakers I38 and lflr are provided at the transmitter and receiver respectively and are timed to make at the beginning of each index point in the machine cycle and break before the end thereof to control circuits to the accumulators and print magnets as will be explained later.

Contacts I50, I52 are operated by the conventional upper and lower card levers which, in turn, are actuated by cards passing the upper and lower sensing stations, respectively. Card lever contacts serve the purpose of preventing initial operation of the feeding mechanism except upon depression of the start key l2! (Fig. '7). These contacts are instrumental in causing the feeding mechanism to stop at the end of a cycle upon a card feeding failure or when the machine runs out of cards.

All the cam contact devices are indicated in the timing diagrams (Figs. 8, 8a) where their relative timing may be observed.

General explanation of the circuit diagram The wiring diagram of the electric circuits is shown in Figs. 7 and 'la wherein the various cam contact devices are diagrammatically shown and suitably labeled L, Lr or P, Pr as just explained. The exact timing of these contact devices is shown in Figs. 8, 8a to which reference may be made for the actual time in the cycle of operation during which they function. Due to the presence of numerous interlocking relays in the circuits both at the transmitter and receiver, it has not been advisable in all instances to show relay magnets and their associated contacts in close proximity to one another.

For purposes of clarity in the wiring arrangement the relay contact points are shown in the circuits which they control and their relay magnets are repeated adjacent thereto. Furthermore, the contacts are designated with the same reference numeral as their controlling magnet, followed by a lower case letter.

Synchronizing means-The driving motors at the transmitter and receiver may be operated in synchronism by any well known means. a preferred method being that illustrated in the U. S. Patent #1,505,158, issued to De Loss K. Martin on August 19, 1924. This method will now be explained briefly in connection with Figs. 7 and 'la and if more detailed description is desired, reference may be made to the above Martin patent.

The obvious purpose of maintaining the driving mechanism at each station in synchronism i to assimilate most nearly the condition of an accounting machine having the usual compact structure in which the various units are driven from a common, constantly running drive shaft.

At the transmitter (Fig.7) a pair of alternators 95 and are provided to supply electrical power at two different frequencies. The frequency set up by alternator becomes the carrier frequency of the system whereas the frequency established by alternator 86 is utilized purely as a synchronizing frequency. Upon the closing of switch Si, a circuit is completed from ground GI, alternator l, alternator 9i, switch SI now closed, either through filter 9| to ground G2 or via conductor 9! through transmitter I to ground G3. Filter 9| is comprised of suitably tuned elements which may be inductance, capacitance, or resistance. Filters are generally classified in the art as high pass, low pass, and band pass filters. filter 9| being of the low pass type and designed to permit the synchronizing frequency but not the carrier frequency to pass therethrough. The synchronizing frequency which appears at the output of the filter is fed to the input of an amplifier 81, then upon closing of switch S2, the output circuit of amplifier 01 affords power supply through switch 82, motor TM, to ground G4. Motor TM is a synchronous motor and is thereby driven at synchronous speed in accordance with the controlling frequency of the alternator 86. It is noted that both the synchronizing frequency and the carrier frequency are impressed upon the transmitter assaasl vide sumcient power to operate whatever load may be connected to its output. a

When the receiving device IOI receives this radiantenergy from the transmitter, it is demodulated and its output circuit includes a signal having a frequency corresponding to the synchronizing frequency mentioned above. Receiver IN is shown ditically in box form but is understood to include the fundamental sections which comprise the radio frequency ampli-.

fier, a detector or demodulator, and an amplifier for the output of the detector, and that such amplification is provided a will be necessary to provide a current of sufilcient strength to operate the various relays and magnets of the accumulators and print unit.

In the present system, it wil be noted that at the transmitter a current having a given frequency is provided for synchronizing purposes. This current is amplified at the transmitter to drive the motor TM at a fixed speed. The same current is also utilized to modulate the transmitter, from which it is sent to the receiver as radiant energy in the well known manner. The radiant energy is demodulated by the receiver, whose output includes a current having the synchronizing frequency. The latter current is separated from the total output of the receiver and is amplified to drive the motor TMr at the same fixed speed as TM. It will be seen that in this method of synchronizing the power employed for driving the motors at the transmitter and receiver respectively is'supplied locally, and that a current of predetermined frequency is utilized commonly at both transmitter and receiver for controlling the local source of power.

The feed mechanism is driven by motor TM through shaft 6 and accumulators and print mechanism by motor TMr, through the corresponding shaft of the receiver (not shown) and the shafts 50 and I9, as previously explained.

Since motors TM and TMr are driven at identical speed by current of the same frequency, and since the main drive shafts are clutched to their driving pulleys at the same instant and thus started from the D" position simultaneously, as previously described, the shafts at the transmitter and at the receiver are driven in a synchronous relationship closely approximating the condition normally attained by actual mechanical connection between these parts in the usual tabulating machine structure.

columnar frequencies-4n addition to the synchronizing and carrier frequencies already mentioned, a plurality of other frequencies are provided, one for each lower-brush position or, in other words, one for each active column of the record card. Twelve such columns are shown in Fig. 7 as indicated by the provision of twelve lower brushes LB and twelve corresponding upper alternators I I to in simply illustrating one such method.

Control lrequenciea-In order to control the various operations of the units at the receiver a plurality of control frequencies are set up atthe transmitter .(Flg. 7) by alternators I25 to I28. The manner in which these frequencies operate will be better understood when the various control circuits are described later herein.

Initial reset cycle-Slightly above the colunmar frequency alternators in Fig. 7 is located the usual group control mechanism generally designated GC, and as is usual in tabulating machines. it is first necessary to set up the group control holding relay magnet Rfl'nefore the card feeding mechanism previously described can be set in operation. This is effected by depression of the reset key toclose contacts III, thereby completing a circuit from right side of line I00, contacts I I0, relay coil R00, to left hand side of line I06. The lines III and I0. are connected through a main switch MS to a suitable source of supplyw which provides the electrical energy for energizing the transmitter circuit' such as the one just described. Energiration of magnet R30 closes its contacts R000 in the upper part of Fig. 7 which will thereupon complete a uit from rightside of line Ill, stop key con; to I01, contacts Rilla now closed, main drive clutch magnets I30, to line I00. Magnets, I10, upon becoming energized, cause a counllna of the drive motor to the main drive shaft I, mentioned above. and, incidentally, alsocauses the closing of contacts I00a which provide a holding circuit for magnets I30 through cam contacts .Li'to linev I00. Cam contacts LI open toward the end of each cycle, and at such time, the circuit- .is maintained through either contacts UCLe or'jLCLe which are in series with stop key contacts 101. The, manner in which one or more of these contacts in the holding circuit may be opened. to interrupt the same will be explained hereinafter. v

The relay-magnet R30, energized by depression of the reset key, closes a second pair of contact points Rflbto coi'nplete a circuit from line I05, cam contacts L2, contacts R0012, reset magnet iii, to line I00. As explained in the mechanical description, energlza tion of magnet 0| causes a cycle of operation of the P cam contacts at the transmitter to controljvarious circuits of the system. Contacts Pl; (atthe lower part of Fig. 7), for

example, close tofenergize the group control relay magnet R from line .I0'l,'cam contacts P1, relay magnet R40, contacts who or L23, to line I05.

The manner in which the group control mechaigtsgm GC functionfs'in the system will be described Prior to the clofl ng of cam contacts P1 to energize magnet Rligin the manner just described, however, relay magnet R40 is energized by a circuitfrom line I00, relay magnet R49, cam

. contacts Ll0,relay contacts R4311, cam contacts P0, to line 100. Contacts Rlld close upon energization of magnet R40 to bring alternator I21 into a circuit for transmitting a control signal of a characteristic frequency to the receiver as follows: ground Gil, alternator I 2I, relay contacts Rlld' now closed, via conductor I09 to transformer III, filter I00, totransmitter I00 where the frequency created by alternator I21 is superimposed on the carrier wave, then via radio wavesto receiver Ill (Fig-7a), conductor, I02, filter III, transformer I00, via conductor I" to filter I00, relay magnet I ll, to common ground Oil. Contacts lfla close when magnet II is energized to complete a circuit for energizing the reset magnet ll from line Ill, reset magnet OI, contacts INs now closed, cam contacts Llrto line Ill. Lines I and III are connected to a suitable source of supp y Wr through the main switch M81. The energilation of magnet Ii causes the resetting of the accumulators, to clear out any old amounts which may be standin therein and prep re the accumulators for new entries. The main clutch III, of course, must be energised to drive the adding wheels through the reset just described. Reierring to the lower part of Fig. 7, contacts iflb close upon energisation of the main clutch I 8., so that alternator I" supplies power at a characteristic frequency to the receiver over a circuit similar to that previously traced via conductor Ill (Hg. 7a) to filter Ill, relay magnet I", to ground GII. Relay contacts Illa close to energize the main clutch Ill. Briefly, then, upon depression of th reset key both main clutches and both reset magnets are energized concurrently to cause the operation of the P cams at the transmitter and the operation of the Pr cams and the reset of the accumulators at the receiver. Immediately following the reset cycle, the feeding of record cards may be initiated upon depression of the start key.

Starting cifcuit.-With relay magnet RA! energired and the accumulators cleared, depression of the start key to close contacts I2! completes a circuit from line III, conductor III, contacts I29, relay magnet R38, relay contacts Rub. relay masnet R32 to line III. The contacts Bllb will be in their normal deenergized position because when magnet R is energized, the circuit to magnet R is broken Relay contacts Rita are in parallel with the previously mentioned contacts Ella and complete the following circuit through the main clutch magnet Ill: irom line I", stop key contacts I", relay contacts R334 now closed, main clutch magnet I", to line I". The energization of magnet III is again accompanied by the energisation of the main clutch magnet II. at the receiver by means of the previously described circuit energized from alternator I16. Thus, the main drive shafts of the transmitter and the receiver start and continue to run at identical speed and phase relation.

Relay magnet R82 is provided with a pair of contacts R8241 which are adapted upon closure to complete a circuit to the card feed control relay magnet R30. This circuit is traceable from line I, relay magnet R38, contacts R320 now closed, stop key contacts Illa (operable concurrently with the contacts I") contacts Rue of the group control relay m anet R" which are now closed, cam contacts Pl, to line III. This circuit, it will be observed, can only be completed when the group control relay magnet 48 is energized. Magnet R3! closes its contact points Rab which are wired in series with card ieed clutch magnet II to energize the latter so that records commence to ieed. Contacts RJla also close to provide a holding circuit for magnet R30 through lower card lever relay contacts ICU: which close as the ilrst record card reaches the lower brushes.

Card lever circuits-As the record cards are advanced past the upper set of analyzing brushes UB. the usual upper card lever contacts I" are closed to complete a circuit from line I", contacts III, magnet UCL, to line Ill. Magnet UCL controls a number of contacts which are disposed in various circuits for controlling purposes. One 01 these contacts, for example UCLe pointed out above as being in the holding circuit for the main clutch I, helps interrupt this circuit ii cards tail to feed past the upper brushes. Deenergization of main clutch III is always accompaned by deenergization of main clutch III at the receiver, because contacts IiIlb (Fig. 7) open to break the previously described control circuit to the receiver from alternator I", with the result that the main drive shafts are simultaneously latched up in the "D" position, in the well known manner. Since the card lever contacts I" open between successive cards, a holding circuit is provided through contacts UCLA and cam contacts Ll which serve to maintain magnet UCL energized during the interval when contacts II. are open. In a similar manner, the lower card lever relay contacts I! cause ener- .gization of lower card lever relay LCL and the contact points LCLa cooperate with cam contacts Ll to provide a similar holding circuit.

Listing circuits-The circuit for the listing magnet I. (Fig. 7a) is completed from line Ill, cam contacts L21, cam contacts PIlr, TAB-LIST switch set to the list position, upper and center straps of relay contacts GIc, listing magnet ll. to line Ill. Through this circuit magnet II is energized during each cycle of operation of the machine and the printing mechanism will function accordingly.

As the record cards advance past the lower brushes LB at the transmitter, circuits are provided for communicating the descriptive data analyzed by these brushes through accumulator list contacts "a to the printing magnets 31 at the receiver which control the stopping oi the type bars as already explained in operation oi the printing mechanism given hereinbei'ore. The list contacts "a are closed upon energization of the adding magnets as the latter receive impulses from the analyzing brushes LB at the transmitter. The addins circuit will be explained later. The closing of a pair of accumulator list contacts Ila completes a circuit to a print magnet 31 as follows: from line I, circuit breaker contacts III now closed, the particular contacts Ila which are also now closed, the print magnet 31 in series therewith, LIST-TAB switch set to LIST, to line Ill. Print magnet I'I upon energization stops the upward movement of the type barit controls to eii'ect the hating of the digit analyzed on the record card at the transmitter.

Adding circuits.-The circuits for adding into the accumulators are completed simultaneously with the listing circuits just described when all the list control switches are set for listing. When the switches are set to the other position, no listing occurs but adding into the accumulator takes place as data entries are read from each card passing the lower brushes LB. A representative adding circuit is traceable from alternator I22, jack I32, plug wire to Jack I, brush LB through the hole in the card in the corresponding column, contact roll I, relay contacts LCL! now closed, circuitbreakers Ill, transformer Ill, via conductor I" to transformer Ill, filter I", transmitter I", receiver Ill, conductor III, filter I45, transformer I, filter I" which passes this particular columnar frequency, adding magnet 58 for this column to common ground GII. The circuit Just traced energizes the adding magnet 58 for one order of the accumulator to turn its adding wheel in a manner previously described to eii'ect addition.

Group controL-When the group control switch I (Fig. 7) is set to the on" position, cards are allowed to continue to feed as long as the control indicia on successive cards passing the upper and lower brushes remain the same. The principle is the same as that shown in Patent #1,976,617 previously referred to. A representative control circuit is from alternator III, jack I02, plug wire to.jack I00, lower brush LB,

through hole in the card in the corresponding column, contact roll I03, contacts LICL! now closed. circuit breaker contacts I00 also now closed, transformer I01, filter I00 which passes this particular columnar frequency, control magnet I1I in series therewith, Jack I00, plug wire to jack I00, upper brush UB in the corresponding column, through hole in this column of the card at the upper brush, contact roll I02, cam contacts LII, cam contacts LI2 now closed. to ground GIO. It will be noted that the circuit Just traced depends upon the fact that the hole in the record card at the upper and lower brushes is the same in the particular column on which the control is operating. Energization of the particular magnet "I by the circuit just traced causes the. closing of its I1Ia contact points which are in series with one of the control magnets I12 and provide a circuit to energize the latter from line I00, magnet I12, contacts I1Ia, common conductor I to line I00. Contacts I12a close when magnet I12 becomes energized to provide a holding circuit through cam contacts L20, and contacts I12b also close to complete a circuit for maintaining the group control relay magnet R00 energized. The latter circuit is traceable from line I00, relay contacts 300a, relay magnet R03, conductor I00, contacts I12b now closed, jack I10, plug wire to jack I10. through left'and center strap of contacts UCLc now closed, to line I00. This circuit is not set up upon the occurrence of a group change and the relay magnet R03 is deenergized on the next cycle when L23 breaks, the card feeding mechanism continuing under its momentum to the end of the cycle where it is latched up by the card feed clutch I1. The operations iust described are well known in the tabulating art and are described in detail in the previously mentioned Patent #l,9'l6,617.

Total printing and reset cycle After the opening of relay contacts R000 (Fig. 7) upon the occurrence of a group controlchange, relay contacts R00d close to complete a circuit from line I00, relay magnet R09, cam contacts LIO, contacts R0311 now closed, cam contacts P0, to line I00. Energiz'ation of relay magnet R00 closes its contact points R00a which are in series with the reset clutch magnet 0|. The circuit which energizes magnet 0| is traceable from line I00, magnet 0i, relay contacts R000 now closed, cam contacts L2 to line I00. Relay contacts 00d also close to render alternator I2] effective to energize the circuit for operating reset clutch magnet 0| at the receiver concurrently with the energization of magnet 0| at the transmitter in a rna nner already described under the heading of Initial reset cycle. Upon energization of the reset magnets 0I and 0I' the P and.Pr cams start to turn and the first operation to take place is the printing of the totals standing in the accumulators at the receiver. This is brought about as follows: at the start of the cycle a circuit is completed from line I00,

relay contacts 1100b, relay contacts R00c now closed, contacts LCLa now closed since there is a card at the lower brushes, relay magnet 200, cam contacts LIO, to lin I00. Energization. of relay magnet 200 causes its contact points 200a to close.

obvious circuit for energizing total print control magnets III, I02 which are then maintained energized through contacts I02e and cam contacts LIOr. Contacts Illa-d and I02a-d connect the readout mechanism of the accumulators with the print magnets 01, the latter becoming energized at differential times under the control of the total print emitter as its brushes 00 sweep the segments 01, in a manner already described, to stop the type bars in accordance with the totals standing in the accumulators and thus eflect printing of these totals.

The total printing operation is followed by a resetting of the accumulator: to clear the same in preparation for new entries to be made therein from the following group of record cards. This is so well known in the art that further description here is deemed unnecessary.

Automatic resumption of card feeding Cam contacts L0 are provided to energize the start relay magnet R02 near the end of the resetting cycle of operations to pick up and energize the card feed clutch magnet I0. The circuits involved in the starting of the machine have been already traced in detail and the operations controlled thereby will proceed in the same manner as above. 7

Group indication cycle-On the first tabulating cycle after a reset, it certain machine switches are properly thrown. a group indication is efiected in the following manner: the GI magnet (Fig. 7) is energized by a circuit from line I00, relay magnet GI, contacts 20"), contacts L20, switch I00 in the position shown for group indication, lower card lever contacts I02, to line I 00. Relay magnet G1 is held energized through its contacts (Ho and cam contacts L1. Shortly after the energization of magnet GI, cam contacts L20 make (see timing chart Fig. 8) to complete a circuit for energizing the control magnet 20I. Thecircuit is traceable from line I00, magnet 20I, contacts L20, now closed, switch IOI in the position shown for group indication, contacts (310 now closed, contacts GIa also now closed, cam contacts L1, to line I05. Magnet 20I is maintained energized through its contact points 20Ia which now close and cam contacts PII. Energizationof magnet 20I causes normally closed contacts 20": to open in order to prevent the energization of magnet GI on subsequent tabulating cycles prior to the next group change.

Magnet GI, when energized, causes contacts GIb to close and a circuit is completed when contacts L21 close from alternator I20, contacts L21, contacts GIb. conductor I00, transformer I00, filter I00, transmitter I00, receiver IOI, conductor I02, filter I00, transformer I00, conductor I01, filter I00, relay mmnet I 02, to common ground GIO. Energization of magnet I02 closes its contacts Ilia to complete an obvious circuit for energizing the group indication relay magnet (31' at the receiver. Contacts GI'a close to provide a holding circuit for magnet GI through cam contacts Llr. Contacts GI'b also close and the circuit which was traced previously to the magnet its branches through these contacts. through filter III which passes this columnar frequency through the print magnet llinserieswithfilter llltocofimgngoglndflil. of t magnet e co e usual group indicatlonf tf h is circuit being completed only on the first card cycle after a reset because of the fact that' magnet GI at the transmitter is deenergiled when Ll breaks and contacts GIb open to cut 08 the source of energy, namely, alternator III.

It is understood that the list clutch magnet 29 is nergized for this cycle to set the printing mechanism in operation to print the group indication just referred to. The specific circuit is traceable from line I, list clutch magnet It, center and lower strap of contacts GI'c now closed, cam contacts Pllr, cam contacts L21, to line I.

Summary operation Each signal passed to the transmitter has both primary and secondary distinguishing characteristics: the former being constant and serving to segregate the signal in the correct channel of the receiving station and thereby to restore the position of the character in relation to the other characters, the latter being variable to represent the signification of the character and being translated by suitable manifesting means into the particular character which it represents.

It has been described how a single control frequency and a single columnar frequency control the accounting machine at the secondary station. Ithasalsobeensctforthabovehowa single column group-control frequency is effective not only to control operations at the transmitter but also at the receiver. It will be appreciated that, in the operation of this system. more than one control frequency and more than one columnar frequency may occur simultaneously. It will be further appreciated that more than one group control frequency may occur simultaneously. The columnar frequencies occur simultaneously when more than one column of the record card contains statistical data appearing at the same differential time and more than one control frequency occurs simultaneously when at least two transmitter control circuits are eifective. Such control and columnar frequencies combine to form a complex wave for modulation of the transmitter carrier.

At the receiver demodulation of the carrier takes place and the remaining complex wave is fed to a filter system. In this system the complex wave is broken down into its component frequencies, each individual filter passing a single frequency. Thus, if two control frequencies occur simultaneously, two control filters pass differing frequencies simultaneously, which are eifective in separate related circuits. Similarly, if two columnar frequencies occur simultaneously, two columnar filters pass differing frequencies which are effective to operate, for example, two or more accumulator columns or two or more print magnets simultaneously.

It is understood that the group control frequencies are not transmitted to the receiver. There is, however, at the transmitter a combination of these frequencies into a complex wave and a separation into their component frequencies by a filter system. Thus, if control data in two columns of a record appears simultaneously, two filters of this system pass differing frequencies simultaneously, and currents at such frequencies are effective to operate the group control circuits of the machine as described above under the heading of Group control. From the foregoing, it is seen that machine routine control, group control, and data representing frequencies are combined into a complex frequency wave for transmission over a single medium which may be either the carrier of a radio system or a wire. Upon reception at a distant point, as has been pointed out. the complex wave is broken down into its component frequencies for machine control and accumulating or recording mechanism control. It is to be remembered that the number of frequencies which are transmitted and broken down at any index point position may vary, such variation being in accordance with the number of control circuits effective at a particular time or the number of data columns in the record which are punched with the same digit indications.

While there have 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 with out 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:

1. In a remotely controlled accounting machine system, cyclically operated means to feed records in succession to an analyzing section of the system, means at that section to analyze corresponding columns of successive records simultaneously for control designations therein during a cycle of the feeding means, stop means normally capable of stopping the feeding means at the end of the cycle, a plurality of sources of current of different frequencies, one for each column of the record, a plurality of external circuits associated with the different frequency sources, a single carrier having common connection with said circuits, the analysis of a control representation in one of the columns of a record at the analyzing section by the analyzing means serving to complete a related one of said external circuits to cause flow of current of predetermined frequency from the associated frequency source to the carrier and means responsive to the current of the frequencies set up on the carrier by the control representations and adapted to be rendered effective only upon agreement in location of a control representation in the corresponding column of the other record at the analyzing section to cause continuance of operation of the record feeding means into the next cycle by rendering the stop means inefiective.

2. In a remotely controlled accounting machine system, cyclically operated means to feed record cards successively to an analyzing station, means at said station comprising two sets of analyzing brushes adapted to analyze successive cards simultaneously for control indicia in corresponding columns thereof during a cycle of the feeding means. stop means normally capable of stopping the feeding means at the end plex wave, a plurality of control circuits asso-' ciated with the other set of brushes, means responsive to the currents of the frequencies set up on the carrier by the control indicia capable of setting up currents of corresponding frequencies in the control circuits including filtering means for causing each of said control circuits to be selected for operation only upon reception of its corresponding frequency, and means under control of the last mentioned set of brushes in accordance with the identity in location of the control indicia in corresponding columns of the card being analyzed by the latter set of brushes to cause operation of the selected control circuits to render the stop means ineffective.

3. In a system for concurrently manifesting a plurality of characters in definite relative positions, means for generating a number of constantly differentiated signals, one for each of said positions, control means operatively associated with said signal generating means and adapted to impart to the individual signals secondary distinguishing characteristics representative of the signiiications of the characters in the positions to which they respectively appertain, transmitting means controlled by said control means so as to impress upon a single medium of transmission signals reproducing the constant differentiation and secondary distinguishing characteristics of the signals from said control means, means to receive the signals from said single medium of transmission, means operatively connected to said receiving means for segregating the signals received thereby, according to their constant differentiation, and manifesting means comprising a plurality of units operatively associated with said segregating means so as to be individually controlled by the respective segregated signals, the units of said manifesting means being differentially responsiveto the signals in dependence upon the secondary distinguishing characteristics thereof, to manifest the characters represented thereby.

4. In a system for concurrently manifesting a plurality of characters in definite relative positions. transmitting means and receiving means interconnected by a single medium of transmission, means for generating a number of constantly differentiated signals, one for each of said positions, control means adapted to pass the signals individually to said transmitting means at I differential times to represent different characters, said transmitting means being responsiveto said signals to transmit to said receiving means signals reproducing the constant differentiation and diiferential timing of the signals passed by said control means, means operatively connected to said receiving means for segregatingthe signals received thereby, according to their constant differentiation, and manifesting means comprising a plurality of units operatively associat ed with said segregating means so as tobe individuaily controlled by the respective segregated signals, the units of said manifesting means being diiferentially responsive to the signals in dependence upon the differential timing thereof. to manifest the characters represented thereby.

5.1nasystemforeoncurrentlymanifeatiaga plurality of characters in definite relative positions, transmitting means and receiving means interconnected by a single medium of transmission, means for generating a number of signals, one for each of said positions, the signals being constantly differentiated by diiferent frequencies to identify each with a particular one of said positions. control means adapted to pass the si nals individually to said transmittingmeans at diiferential times to represent diiferent characters, said transmitting means being responsive to said signals to transmit to said receiving means signals reproducing the frequencies and differential timing of the signals passed by said control means,.means operatively connected to said 'receiving means for segregating the signals re ceived thereby, according to their frequencies, and manifesting means comprising a plurality of units operatively associated with said segregating means so as to be individually controlled by the respective segregated signals, the units of said manifesting means being differentially responsive to the signals in dependence upon the diiferential timing thereof, to manifest the characters represented thereby.

6. In a system for manifestingdata from a record sheet whereon indicia appear in a plurality of columns and identify characters individually by their locations in particular index point positions in the columns, means to feed the record sheet in the direction of its columns, analyzing means comprising sensing devices assigned to different columns to analyze the columns simultaneously as the record sheet is fed, means for generating a plurality of constantly differentiated signals and conducting said signals to the respective sensing devices of said analyzing means, transmitting means and receiving means interconnected by a single medium of transmission, means toconvey signals passing through said analyzing means as indicia are sensed, to

said transmitting means for transmission to said receiving means, the signals being differentially timed in accordance with the index point positions of the indicia, means operatively connected to said receiving means for segregating the sig- 1 nals received thereby, according to their con-" stant differentiation, and manifesting means comprising a plurality of units operatively asse ciated with said segregating means so as to be individually controlled by the respective segre gated signals, the units of said manifesting means being differentially responsive to the signalsin dependence upon the differential timing thereof, to manifest the character's represented thereby;

7. In a system for manifesting a pluralit of" multi-order items of data composed'oflraracl".

ters which vary in' the individual orders, trans: mitting means and ,receiving means intercn-s nected by a single medium of transmissiom means for energizing said transmittingfmeansfor each? item to transmit through" said medium 1/ wave groups of different frequencies pertaining tothei respective orders; of the data, means controlling the operation of said energizing means*so asto impart to, the wave group of each frequency secondary distinguishing characteristic representative of the character in the order to which-it appertains, means connected to said receiving means for segregating the wave groups of difierent frequencies in different channels,- and multi-jorder manifesting means comprising'individual control means for its diiferent orders operatively associated with the respective channelsof said 1 2,sss,aa1

segregating means, said control means being adapted to respond to said wave groups differentially in each order independence upon the secondary distinguishing characteristics of the wave group, to cause the related order of said manifesting means to manifest the character represented by said secondary distinguishing characteristics.

8. In a system for manifesting multi-order data composed of characters which vary in the individual orders, transmitting means and receiving means interconnected by a single medium of transmission, means for mergising said transmitting means to transmit through said medium wave groups of diflerent frequencies pertaining to the respective orders of the data, cyclically operating means controlling the operation of said energizing means, adapted to determine independently for each order the fraction of each cycle during which a wave group of the frequency pertaining to the respective order is transmitted, to represent particular characters; means connected to said receiving means adapted to segregate the wave groups of different frequencies in different channels. multi-order manifesting means comprising individual control means for its different orders operatively associated with the respective channels of said segregating means, said control means being adapted to respond to said wave groups differentially in each order, according to the intra-cyclical timing of each wave group, to cause the related order of said manifesting means to manifest the character represented by the fraction of the cycle during which the particular signal was transmitted.

9,111 a system for manifesting multi-order data represented by sensible indicia on a record sheet, the indicia representing different characters by their placement at different index point positions in the columns pertaining to their respective orders, transmitting means and receiving means interconnected by a single medium of transmission, means associated with said transmitting means for feeding the record sheet in the direction of its columns at a constant rate, analysing means connected with said transmitting means, comprising devices for sensing the individual columns of the record sheet, a plurality of sources for gmerating si nal waves of different frequencies, and means for connecting said sources individually to the respective sensing devices of said analyzing means, whereby said transmitting means is energized to transmit through said medium signal waves identified with the respective columns of the record sheet by their frequency and secondarily differentiated by their differential timing to represent different characters; means connected to said receiving means for segregating said signal waves in different channels, according to their frequencies, manifesting means comprising a plurality of manifesting elements representing different orders of the data to be manifested, driving means for said manifesting means operating in synchronism with said record sheet feeding means and having means for imparting differential movements to said manifesting elements, and control means operatively associated with the respective channels of said segregating means, adapted to determine the extents of the differential movements of the different manifesting elements, in dependence upon the differential times of the respective signal waves. to determine the characters to be manifested.

10. In a system for manifesting multi-order data represented by sensible indicia on a record sheet, the indicia representing different characters by their placement at different index point positions in the columns pertaining to their re spective orders; transmitting means and receiving means interconnected by a single medium of electrical transmission, means associated with said transmitting means for feeding the record sheet in the direction of its columns at a constant rate, analyzing means electrically connected with said transmission means, comprising devices for sensing the individual columns of the record sheet, a plurality of sources of alternating current of different frequencies and means for connecting said sources individually to the respective sensing devices of said analyzing means, whereby said transmitting means is energized to transmit through said medium signals identified with the respective columns of the record sheet by their frequency and secondarily differentiated by their differential timing to represent different characters; means connected to said receiving means for segregating said signals according to their frequmcies in different circuits, manifesting means comprising a plurality of manifesting elements representing different orders of the data to be manifested, driving means for said manifesting means operating in synchronism with said record sheet feeding means and having means for imparting differential movements to said manifesting elements, and control means operatively associated with the respective circuit of said segregating means, adapted to determine the extents of the differential movements of the different manifesting elements, in dependence upon the differential times of the respective signal waves, to determine the characters to be manifested.

11. In a system for manifesting muiti-order data composed of characters which vary in the individual orders, transmitting means and receiving means interconnected by a single medium of transmission, a plurality of parallel channels each including a source for generating a signal wave of a particular frequency to identify a particular order of the data, said parallel channels being joined by a common channel to said transmitting means, means controlling said parallel channels individually to release therethrough signal waves of the respective frequencies, differentially timed to represent the characters in the respective orders of the data, whereby discrete or complex waves are set up in said common channel for transmission by said transmitting I means; means connected to said receiving means for segregating the signal waves in different channels, according to their frequencies, and multiorder manifesting means comprising individual control means for its different orders operatively associated with the respective channels of said segregating means, said control means being adapted to respond to said signal waves differentially in each order in dependence upon the differential timing of the signal wave, to determine the character to be manifested.

12. A system as described in claim 11, wherein the signal waves of different frequencies set up in said common channel are discrete or complex depending upon whether the characters they represent are different or identical.

13. In a system for manifesting at a remote point multi-order data represented by sensible indicia on a record sheet, transmitting means and receiving means interconnected by a single medium of transmission, a main source of elecasexual means at two different frequencies, one adapted to be a carrier frequency and the other a synchronizing frequency, means including a synchronous motor drive for feeding the record sheet, means for supplying electrical energ of synchronizing frequency from said mainsource to said synchronous motor drive, means for impressins upon the carrier frequencyenergy issuing from said transmitting means, modulating waves of diflerent frequencies identified with the respective columns of the record sheet, each of the modulating waves being secondarily diflerentiated to represent the characters in the respective columns of the record sheet; manifesting means comprising a plurality of manifesting elements representing different orders of the data to be manifested, driving means for said manifesting means including a synchronousmotor and means operated by said last motor for imparting differential movements to said manifesting elements, means electrically connected with said receiving means for segregating the synchronizing frequency from the other frequencies, means for amplifying the current'of said synchronizing frequency and supplying the amplified current to said last mentioned synchronous motor, to synchronize the drive of said manifesting means with that of said record feeding means, means electrically connected with said receiving means for sep arating the modulating waves from the carrier waves and segregating the modulating wavesin individual parallel circuits according to their respective frequencies, and control means opera- ,tively associated with the respective circuits of said segregating means, adapted to determine the extents of the differential movements of the diiferent manifesting elements, in dependence upon the differential times of the respective signal waves, to determine the characters to be 4 0 manifested.

14. The method of manifesflng characters by groups at a remote receiving station, which comprises generating different signals for the diifer- 'enteharacters of agrounwhichare constantly are individually variably distinguished by secondary distinguishing characteristics representative oi the signiflcations of their related characters: impressing said signals upon a single medium of transmission; receiving said signals from said medium of transmission at the receiving station and segregating them according to their constant differentiation; and manifesting the characters represented by the secondary distinguishing characteristics of the segregated si 'nals.

15. The method of manifesting a group of characters in a brief period of time, at a remote receiving station: which comprises generating, in a single medium of transmission, signal waves which have different frequencies identifying them respectively with the different characters of the group, and which are individually differentially timed within said period of time to represent the signiflcations of their respective characters; receiving the signal waves from said medium of transmission at the receiving station and segregating them according to their respective frequencies; and manifesting the characters represented by the differential times of the individual segregated signals.

16. The method of manifesting a group of characters in a brief period of time at a remote receiving station; which comprises electrically gentative of the significations of the respective characters; transmitting said signal waves through a single medium of transmission in which any con- ,temporaneous signal waves are merged into a complex wave: receiving the signal waves, at the receiving station and segregating them accordingto their respective frequencies and manifestin! the characters represented by the diflerential times of the individual segregated signal waves.

, H. DICKINSON.

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