US2213560A - Transmission system for statistical data - Google Patents

Description

Sept. 3, 1940.

J. w. BRYCE 2,213,560

TRANSMISSION SYSTEM FOR STATISTICAL DATA Filed Oct. 19, 1938 6 Sheets-Sheet 1 lNVENTOR 8 ATTORNEY J. w. BRYCE 2,213,560

Fiied Oct. i9, 1938 6 Sheets-Sheet 2 DWI TRANSMISSION SYSTEM FOR STATISTICAL DATA Sept. 3, 1940. I

ATTORNEY P 1940- J. w. BRYCE 2,213,560

TRANSMISSION SYSTEM FQR STATISTI GAL-DATA Filed Oct. 19, 1938 6 Sheets-Sheet 3 E. a. v KT K? aw NJ G. n Fl v *m INVENTO M mmm m m w y m5 i 75 a a E 4 h rim F ATTORNEY @NQE p 1940- J; w. BRYCE 2,213,560

- TRANSMISSION sYsT'Eu FOR STATISTICAL Imm- Filed Oct. 19,- 1938 s Sheets-Sheet 4 FlG.2b.

g BY

a ATTORNEY Sept. 3, 1940. J. w. BRYCE 2,213,560

TRANSMISSION SYSTEM FOR STATISTICAL DATA Filed Oct. 19, 1938 '6 Sheets-Sheet 5 r IIWIHH llllllillll O0OOOOOOOOOOOGOOOOOKQOOOODO INVENTO ATTORNEY Sept. 3 1940. .1. w. BRYCE 2,213,560

TRANSMISSION SYSTEM FOR STATISTICAL DATA Filed Oct.- 19, 1938 6 Sheets-Sheet 6 IIIIIIIIIIIIIIIIIA lllll-lllllllr WI/I/I/II/IIIIIIII/I/I/l/III/IA v a: s 77- A\\\\\\\\\\ IIIIII/IIIIIIIIIII 7 8 7.9 lNVENTOR ATTORNEY Patented Sept. 3, 1940 PATENT OFFICE TRANSMISSION SYSTEM FOR STATISTICAL DATA James W. Bryce, Glen Ridge, N. J., assignor to International Business Machines Corporation, New York, N. Y., a corporation of New York Application October 19, 1938, Serial No. 235,821 8 Claims. (01. its-2) This invention relates to transmission systems for statistical data and more particularly to systems of the type which provide verifying means at a primary station for data recorded at a remote secondary station. One form of such a system is disclosed herein, another form being shown in my ccpending application Serial No.

235,819, and still another form'being shown in my copending application Serial No. 235,820.

Transmission systems with check-back means for the data received at a secondary station are old, a considerable number of difierent methods being known at the present time, but in a great majority of these systems it is possible for the data received at the secondary station to dificer from the data actually recorded at the latter station so that, even though the system checks as to the data received, the'recorded data may be in error and this error remain unnoticed.

It is therefore an object of the present invention to provide'data transmitting means at a first station for effecting the reception and duplication of said data at a second station and novel comparing means under direct control of the duplicate data for comparing such data with the original data transmitted at the first station. Thus, by having a comparing means controlled directly from the recorded data a greater assurance of the accuracy of the system is provided.

According to the present invention, a contact control key at a station A is operated to send out a series of impulses which cause a record card to be fed into a punching position at a 35- station B, located at a distant point from station A. Then, upon depression of a character key, printing of the corresponding character is effected at station A, and at the same time a series of impulses are sent to station B to 40 cause the energization of a chain of relays there to a predetermined extent dependent upon thecharacter transmitted. These relays control the operation of means for printing and punching the character at station B. The character is punched in a column of a record card. Other characters are transmitted in-a similar'manner and are punched in different columns of the record card which. are successively presented at the punching station. After the card is completely punched in its data-receiving columns, it is fed past an analyzing station where it is analyzed column for column and multiple impulses representing the characters punched in each of the columns are retransmitted to station A. At station A, this data is received and printed to provide a visual check against the previously printed data at station A. If there is an agreements. new record card feed and carriage return is initiated. If there is no agreement, an adjusting key at station A is depressed to adjust station B and also visually to indicate at that station the failure of the re-transmitted data to verify. At station 13 the newly punched record card is removed and, after station A has adjusted 3, station B adjusts A. Operations are then resumed as before. The importance of having an accurate check-back on the transmitted data as described above, especially in statistical work which deals primarily with numerical values, is well realized by those familiar with the art. I

Further objects of the instant invention reside.

in any novel feature of construction or operashown in the accompanying drawings whether within or without the scope of the appended claims and irrespective of other specific statements as to the scope of the invention contained herein.

In the drawings:

Figs. 1 and 1a are representative circuit diagrams of the transmitter and receiver respectively at station A.

Fig. 1b is a timing chart for the circuit diagram shown in Fig. 1.

Figs. 2 and 2a are representative circuit diagrams of the receiver and transmitter respectively at station B. 5

Fig. 2b is a timing chart of the circuit diagram shown in Fig. 2a.

.Fig. 3 is a plan view of a portion of the transmitted keyboard.

Fig. 4 is a sectional view taken at 4'4 of Fig.3.

Fig. 5 is a sectional view taken at 5-5 of Fig. 3, showing a transmitting key and the various operating mechanism associated therewith.

Fig. 6 is a view of the dash pot control mechanism which is applied to certain relay contacts in the various circuits of the system.

Fig. 6a. is detail plan view of the mechanism associated with the'dash pot.

Fig. 7 is a vertical section taken through the analyzing, punching and card feeding mechanism of the punching machine.

A preferred embodiment of the invention wi now be described with reference to the accomor series of impulses.

Seven keys are shown as representative, three of them being allotted to numerical characters and the remaining four being provided for various control operations such as space control, card feed,- verifying, and adjusting. If more than three different numerals are to be transmitted more numeral keys are added, but the four control keys are sufficient regardless of an increase in the numeral keys. Depres: sion of any of the keys causes the operation of a special set of contacts associated therewith so as to initiate a corresponding impulse If a numeral key is depressed, it also causes printing of the numeral by energizing a print solenoid associated therewith, all of which will be described in detail hereinafter. The mechanism illustrated in Fig. 5 in association with the adjust key I! is similar to that for the other keys. It is seen .that the depression of key I! causes an insulated conducting portion [1a. to bridge the contact springs l'lb. A notched projection no at the same time cams latch bar H! to the right and then allows it to return to the left again under spring action so that the left extremity of bar I9 is positioned above the latch point on projection l'lc to hold the key down. Then at a later time, as will be described later, solenoid l8 becomes energized momentarily to move the latch oar 19 to the right away from projection He, thus releasing the key I! and allowing it to raise to its normal position under the urging of its return spring l'ld. It will be noted that only one key may be depressed at a time due to the presence of locks 9 (Fig. 4). When a key is down it maintains the locks adjacent thereto spread apart so that the combined clearance of the locks 9 is taken' up and no other key may be moved down between them. This structure is elementary and similar to that used in key.- operatcd punches to prevent the operation of more than one key at a time so that no further description is believed necessary;

A transmitter commutator 20 (Fig. 1) and a .rotatable arm 2| are also located at station A, arm 2| being maintained continuously rotating in a clockwise manner at uniform speed by any suitable means such as an electric motor (not shown). The speed at which this arm is to rotate is determined by two factors; namely, the desired speed of transmission of the impulse and the speed of functioning of the receiver mechanism at station B. An arm 2| traverses the various transmitting segments of the commutator 20, aplurality of circuits are successively closed depending upon which of the keys H to I! was operated to effect the transmission of a predetermined number of impulses from the transmitting device 43. The circuits will be described in detail later.

The mechanism actuated at the receiver of station B by the incoming impulses comprises a chain system of multiple contact relays Rl to B! (Fig. 2) which control the selective energization of a plurality of print solenoids, such as the one designated 62 for example. Solenoid 82, upon becoming energized, pulls its armature 62a and the key lever connected thereto down so as to operate a printing mechanism which is diagrammatically represented by a platen 51, a hammer 51a, and suitable linkage 5'"; connected between the hammer and the key lever. Motion transmitted through the linkage 51b causes the hammer to be moved toward the left to strike the platen. The leftward movement of the hammer closes a contact 6222 to energize a punch solenoid 12 by a circuit to be described later. Punching mechanism of any convenient type such as shown in the U. S. Patent No. 1,772,186 to F. L. Lee et al., for example, may be employed. Printing and punching under solenoid control are old in the art, and therefore the representation of the printing and punching means illustrated in Fig. 2 and Fig. 7 respectivetively are believed suificient.

After the record card has been completely punched it is re-fed into the punch and is permitted to move out again column by column during which movement it is analyzed for the character perforation therein. The analyzing station is located just beyond the punch die and comprises contact balls 22 (Fig. 7) mounted in an insulating support and spring-pressed towards the card C. Above the card there is a contact block 23. It is understood that, when a perforation passes over one of the balls 22, that ball is urged upwardly by its spring to establish contact with the contact block 23.

In order that the re-feeding of the card for analyzing purposes may be effected properly, it becomes necessary to suppress the feeding of a new card into the punch at this time. The mechanism shown in Fig. 8 is therefore provided. The magnet "H becomes energized when the card has reached the last column. After the last column is analyzed, the feed stroke occurs as will be explained later but lever 18 cams down the card feed knife edge 19 so that it fails to feed a new card C. After the feed stroke, magnet H becomes deenergized and the card feed knife 19 raises to its normal operating position.

A device for retransmitting multiple impulses to station A to represent the character perforations in the record card in turnas they are analyzed at station B comprises a commutator 24 with a rotating arm 25 and a transmitter station having dash pot mechanism generally designated 54 (Fig. 6.) associated therewith to control the time of operation of a plurality of sets of contact including those designated 55b,

55c, 55d, and-55c. Relay coil 55, upon becoming energized attracts the armature 5 so that a cylinder 5a attached to the right extremity of the armature is moved down forcing air out through an opening I in the dash pot 54. It is seen that the speed of closing of contacts 55b, 55c, 55d, and 556 are dependent upon the size of the open-- ing I which is adjustable in a manner to be explained presently. When the relay coil 55 is deenergized, the outside air rushes in through the opening 8 and the armature is allowed to restore quickly under spring action and return the above contacts to their normal position.

The size of the opening I is manually adjustable by turning knob 6 which is fixed to a threaded shaft 6. Automatic means for rotating the shaft 6 in either direction is also provided so as to speed up or slow down the closing of the contacts under control of the dash pot mechanism. A train. of gears, generally designated 4, connects the shaft 6 for operation by a differential device 66 actuated by a pair of pawls 9|, 92 and, ratchets 66a, 66b. Theshaft 6 forms a frictional mounting for one of the gears of the above train. The ratchets may be locked or released according to the position of a pair of cooperating detents 2 and 3. The detents are n'ormallyin the position shown in the drawings and are mounted on a common shaft l. A solenoid X controls the engagement and disengagement of the detents. When detent 2 is disengaged from ratchet 66o, detent 3 is engaged in ratchet 661). A magnet I35, when energized, causes the pawl 9| to feed. ratchet 66b clockwise one tooth. A magnet I36 cooperates with pawl 92 to feed ratchet 66a counterclock- Wise one tooth. The manner in which these magnets are energized will be better understood later from the description of the circuits of the system. It is sufficient for the present to state that the stepping of ratchet 56b in a clockwise direction causes the threaded shaft 6 to back up by motion transmitted thereto through. the gear train 4 and allow an increase in the size of opening 1. On the other hand, the counterclockwise movement of ratchet 660, causes motion to be transmitted through the gear train 4 to turn shaft 6 clockwise thereby decreasing the size of the opening 1. Thus, ratchet 66b'is operated in the direction indicated by the arrowto speed up dashpot action and ratchet 65a is operated to slow down this action. The solenoid X is located in series with magnet I36 and is energized when the latter is energized so as operation.

to release the-ratchet 66a. Ratchet 66b is normally free of detent 3 so that solenoid X need not be operated upon the operation of magnet I35. The purpose of the dash pot control mechanism and the automatic adjustment therefor will be explained in connection with the explanation of the circuits and operation of the sysof fresh record cards in its hopper, and that.

the two stations are in adjustment which is described later. It is first necessary to feed a card from the hopper between the die and stripper of the punch to a punching position. This is accomplished by transmission of a predetermined number of impulses from station A to station B. These impulses cause the energization of a selected control magnet of the chain relay system already described which in turn causes the punch clutch magnet to be energized in a manner to be described presently; A key l5 (Fig. 1), referred to as the card feed key, is depressed (see Fig. 5 and Fig. 1-) to initiate the above The depression of the card feed key l5 causes conducting portion |5a to bridge contact springs |5b and complete a circuit to connect relay coil 35 directly across the line. Relay 29 also becomes energized by .a circuit from right hand which carries arm 2|.

now rotates in synchronism with the arm 2l' period (see timing diagram, Fig. 112).

line 26. The energization of magnet 40 causes .the cam associated with contacts CC3 to be clutched in for rotation with the same shaft Cam CC3 therefore from the D" positiononward. Near the end of the next cycle, the cam causes-the closure of its contacts CC3 for a purpose which will be explained later. here that the depression of any of the keys H to H causes the clutching in of the CC3 cam to the commutator shaft and the energization of relay coil 29.

The energization of relay 35 upon depression of the card feed key l5 causes the closing of contacts 35a and 0-47. A circuit is completed through contacts 35a at the time arm 2! con tacts segment 20a of. the commutator 20 in the following manner: from line 21, wire 28 to contacts 35a now closed, relay coil 39, contacts 39b,

It might be well to mention above circuit, closes its contacts 30a to cause the energization of relay 'coil 38 from line 21, contacts 30a, relay coil 38, to line 26. The holding circuit for relay 38 is through contacts 38a now closed and cam. contacts CC|.- As previously mentioned, the CC cams are driven at the same speed as arm 2|, and when the arm 2| is at line D of commutator 20, the CC cams are in the well known ,D position as illustrated inthe timing diagram (Fig; 1b). Relay 38 is provided with contacts 38b which are located in series with the transmitter 43 and are normally open. Thus, it

is. seen that transmission may be effected only when the energization of relay coils 30 and 38 has occurred previous to the passage of arm 2| over the various transmitting segments of the commutator 20.

With relay 38 energized, a series of impulses may now be transmitted. The transmitting cir-. cuit is from line 21 through resistance 4|, contacts 38b now closed, wire 42, contacts 359 now to line 26. The flow of current through resistance 4| causes a potential drop across it which is impressed upon the input of the transmitter 43 to cause an impulse to be sent out from station A to station 13. Relay 45, upon being energized by the previously traced circuit, closes its contacts 45a to energize relay coil 44 from line 21, through relay contacts 45,through relay closed, relay coil 45, segment spot 29b, arm 2|,

coil 44, to line 26. Relay coil 44 is then held 4 energized through its contacts 44a and cam contacts CC2 until the end of the transmitting As the rotating'arm 2|-successively contacts the segment spots 20c, 20d, Zoe, and 201, additional impulses aresent out from transmitter 43. In this case, that is, where key I5 is depressed, the contacts 350 through 359 cause transmission of impulses, five in number. Assuming the key l5 has been released by the operator, it is still held in a down position by latch I9 in a manner already described for key l1.

Following the transmitting portion of the cycle,

,a circuit is completed to energize relay coil 39 by means of the arm 2| from line 26, through arm 2|, through segment spot 2012, through contacts 4417 now closed, relay coil 39, to'the other side of the line 21. Relay coil 39 is held energized through its contacts 39a and relay contacts 29b now closed. The energization of relay coil 39 by (the above circuit opens its contacts 39b and prevents energization of the relay coil 30 should the key I5 remain depressed for another machine cycle. This effectively prevents transmission of a repeated series of impulses for the same depression of the key. Key I5 is released near the end of the cycle when cam contacts CC3 close to energize relay I8, which shifts latch I9 (Fig. 5) to permit key I5 to move upward under spring action in the same manner as illustrated for key I1. If the operator, however, has not yet released key I5, the shifting of latch I9 has no effect and magnet 40 remains energized due to continued closure of relay contacts 29a. Once the operator removes pressure from the key, however, the next shifting of latch I9 will release key I thereby deenergizing relay coil 29 and consequently relay coil 39. Relay contacts 3% then are allowed to close once more and, upon the next key depression, a new series of impulses may be transmitted.

The five impulses transmitted in the manner just described are received at station E and effect a card feed there asfollows: Upon reception of each impulse at station B (Fig. 2) the receiver 50 is actuated accordingly and causes the energize.- tion of relay coil 52 for each impulse. Coil 52 closes its contacts 52a upon each energization. The first impulse completes a circuit from line 46, relay contacts 52a now closed, through center and-upper relay contacts 5Ia, RIb, R25, etc., through R11), wire 49, relay coil 5|, and back to the other side of the line 41. Relay coil 5| then shifts its make before break contacts 5| a, that is, the center and lower contacts make before the center and upper break.v Coil 5| thus remains energized for the duration of the first impulse through relay coil 52. Contacts 5Ib close and cause the energization of relay coil RI from the left-hand side of line 46, through contacts 53a,

contacts 5Ib, contacts RIa, relay coil RI, to line 41. Relay coil RI is maintained energized through contacts -R2d, the holding circuit being from line 41. relay coil RI, contacts RIa, relay contacts R2d, contacts 53a, to line 46. The contacts RIa. are also of the make before break type. Relay contacts 5Ic also close to cause the energization of relay coils 55 and 55' by completing a circuit from line 41, relay coils 55 and 55 in parallel, contacts 5|c now closed, ,to line 46. The holding circuit for these coils is through contacts 55'a, 60, 6|, 53b, and 63a.

A plurality of contacts are operated under the control of relay coils 55 and 55'. Those operated by coil 55, including contacts 552), 55c, 55d, and 556, are provided with dash pot control mechanism as already described. Contacts 55'a and 55'f, which are operated by relay coil 55', are not dash pot controlled. The purpose of the dash pot is to prevent any one of the chain relays from being energized to effect control until the completion of the time during which all possible signal impulses have entered the chain relay group. Accordingly, the adjustment of the dash pot is such that contacts 551) do not close until the arm shifting of the RM contacts, which are of make before break type previously described, transfers the holding circuit for relay RI back through contacts 5211. Therefore, upon opening of these contacts, relay RI is deenergized. Relay R2 is held energized through contacts R2a and R3d. In a similar manner each successive impulse entering the chain causes an energization of a new relay and deenergization of the previous one. When the five impulses representative of a card feed are all received, relay R5 is energized to manifest this fact. Shortly thereafter relay contacts 55b close and a circuit is completed as follows: from line 45, relay contacts 555, switch 56 now closed, contacts Rlc, R20, R30, and R40 in the position shown, contacts R50 now in a shifted position, solenoid 61, to line 41. This circuit energizes solenoid 61 causing it to pull down its plunger 51a and to close its contacts 61b. The closing of contacts 61b completes a circuit to energize relay coil 68 as follows: from line 46, relay coil 68, contacts 61b, to line 41. The depression of plunger 61a also closes contacts 610 causing relay coil 53 to become energized by a circuit from line 41, contacts 610, relay coil 53, to line 46. Relay coil 53, upon energization, opens its contacts 53a to deenergize relay R5, and also opens its contacts 53b to deenergize relay coil 55. With the energization of relay coil 68, contacts-58a close to complete a circuit from line 46, through contacts 68a,

through the punch clutch magnet 1B and back to the right-hand side of line 41. Energization of punch clutch magnet 10 shifts contacts 69 to energize the punch motor 65 by completing a circuit thereto from the left-hand side of line 46, through contacts 59, through motor 65, and back to line 41. The punch motor 55 then operates to eflect the feeding of a new record card to the punching position.

Station B is now ready to receive the impulses representative of statistical data from station A. One of the digit keys at station A, for example, key I2 (Fig. 1), is now depressed and closes its associated contacts I2b in a previously described manner to effect the energization of the relay coil 32. The closure of contacts 32b then completes a circuit from line 26, through contacts 325 now closed through typewriter solenoid S2 and back to the right-hand side of line 304. Energization of solenoid S2 causes printing of the numeral 2 at station A. Closure of contacts 32a causes a pickup of relay 30 and also relay 38 as previously described so as to prepare the transmittingcircuit. Closure of contacts 32c and 32d then permits transmission of two impulses from station A to station B, the transmission of these impulses being effected in the same way as for the card feed impulses.

At station B, upon reception of the two impulses, relay coil R2 becomes energized and, at the time dash pot contacts 5517 close, a circuit is completed from the left-hand side of the line 45, through contacts 555, receiving switch 56 now closed, through contacts RIc in position shown, through contacts R20 in a transferred position, through solenoid 62, to line 41. Plunger 62a is pulled down to effect printing, on the sheet and platen 51, of the numeral 2. Contacts 620 now close to energize relay coil 53 in a previously described manner. Contacts 62b, in closing, energize relay coil 12 by completing a circuit as fol-.

lows: from line 46, escapement contacts 58, interposer solenoid 12, contacts 62b, to line 41. Interposer solenoid I2, upon being energizechcloses interposer contacts 14 to energize the punch magnet by a circuit from the line 46, latch contacts, 88 in the position shown, punch magnetll5, interposer contacts I4, to line 41. In the wellknown manner the energization of punch magnet I5 causes the punching of the digit 2 in the record card.

The punching impulse is effected in the first column of the card in the punching position. A skip bar may or may not be used as desired. If no skip bar is used the card is spaced column by column to a. first punching position in a manner which is explained later. Energization of the punch magnet 15 causes the depression of the usual punch motor bar on a punch which punches the record card and permits it to move forward one column ready to receive a new perforation. The record card is punched accordingly column by column out to the last data-receiving column. It

, is then shipped to the actual last column position where it remains because the ejection operation, normally following the moving of the card in the last column position, is rendered inefiective at this time as will be explained later..

The next step in the sequence of events is to cause a re-feeding of the just-punched card into the punch in order that the perforations thereon may be analyzed forveriflcation purposes.

* so-called verify key I8- at station A (Fig. l) to send out a series ofsix impulses to effect the energization of relay R6 at station 13 (Fig. 2) in the same manner as already described for the transmission of character impulses. As a result of relay R8 being energized, when contacts b close a circuit is completed to energize solenoid I82. Contacts I82b then close to pick up coils I88 and. 89. Coil I88 is held energized through its I88a contactsand the eject contacts 81, but

coil 88 is energized only momentarily to close contacts 880 and energize the card feed knife controlmagnet 11 which is then held through its Ila contacts, which are closed by lever 18,

and rack contacts 84 in the normal position.

The card feed knife is deflected downwardly in a manner already described to preventthe feeding of a new card at this time. .,When the armor ture lever 18 has depressed the card feed knife suiiiciently to lower it below the plane of the card which it would ordinarily feed, contacts 88 also closed to provide .a circuit to energize "the punch clutch magnet 18. The energization of the clutch magnet 18. causes the shifting of contacts 88; to energize the punch motor85.

feed racksup toward the punching position. The card which has just been punched but not ejected is thereby carried'back into the punch by one rack, and, the card feed knife having been deusual fresh card. Near the end of the feed i stroke, rack contacts 64 are shifted to break the holding circuit to magnet .I'i. At that time punch clutch-contacts 69 are trippedback to normal to deener'gize the punch motor 85. The inst-punched card has now been fed back into thepunch so that the first column is aligned in the punching position. It is now necessary to conditioncircuits for analyzing the perforations in the card, column by column. A circuit must firstbe completed to the contact roll as (Fig. 2a) in the following manner. Relay coil 58 (Fig. 2) becomes energized at the end of the feed stroke described above through the shifted rack contacts 68 and This is accomplishedby-the depression of the When the punch motor operates, it moves the fiected down, the other rack fails to feedin the contacts I030 now closed. .The holding circuit for coil 59 is from line 41, coil 58, contacts 59a now closed, last column contacts 18 now closed, to line 46. Relay contacts 59b (Fig. 2a) close to provide a. circuit tothe roll 23. A portion of the card is insulating the roll 23 from the analyzing contact balls 22 at this time, so that no current passes through the roll 23.

As the analyzing station is located one col-' umnaway from the punching station, it is necessary to provide an, automatic spacing of one column so that the re-fed card is moved into a position where its first column is at the analyzing station. To accomplish this, a circuitis completed when commutator arm 25 engages segment, spot 2472. as follows: from line 48, contacts I831) now closed, escapement contacts 58, commutator arm 25, segment 2471., relay coil 85, contacts 59c now closed, contacts 88c, relay coil 88, to line 41. Contacts a (Fig. 2) close upon energization of coil 85 to energize the punch space control magnet I88 by a circuit from line 41, conductor I I5, contacts 8511 now closed, punch space control relay I88, to line 46. When relay I88 becomes energized, contacts I-Illlbclose to energize the punch magnet 15 to allow the card rack to escape one column. The first column of the card is then in position to be analyzed. The position of the-perforation in this column determines which one of, the analyzing relays M to 84 are energized. Assuming a "2 hole is being analyzed, relay 82 will become energized by a circuit from line 41, contacts 5% now closed, contact roll 28, through the hole in v the card, relay coil 82, to line 46.

' Coil 88, which was energized as described previously, is held through its 85a contacts and CC8. Then, when contacts CC-Ill' close, a circuit is completed from line 46, conductor 98. contacts 8811. relay coil 88, to line 41 The hold- :ing circuit ion coil 88 passes through contacts 881:, now closed, and the eject contacts H6. Contacts 880 open to prevent further energization of coil 88 after cam contacts CC-Q open. Also, with contacts 88b now closed,-a circuit is completed when the commutator arm 25 engages segment spot 249 as follows: from line 48, contacts I881) now closed, escapement contacts 58' in the normal position, arm 25, segment 249, contacts I28b also in the normal position, contacts 88b now closed, contacts 58o now closed, relay coil I88, to line 4'5. Relay coil I88, upon'becoming energized, is held in its operated condition through contacts I88a now closed and CC 'I.

The circuit for retransmitting impulses to station A is now provided in the following manner: from line 48. contacts I88!) now closed, contacts 58' in the normal position, arm 25, segment spot aand then segment spot b, contacts 8": and then contacts 821), contacts IIl8cnow closed, relay coil I24, contacts I200 in the nor-- mal position, resistance II2, to line 4?. The potential drop across resistance II2 provides bias to transmitter Bfor sending impulses to station 'A for efl'ecting a comparison of the character represented by the retransmitted impulses with the original character'recording at station A. a With a "2 holein the card at station B, an impulse is sent out when arm 25 engages segment 28a and again when this arm engages segcapement contacts during the feed'of the card to the first analyzing position. As arm retates further and arrives at segment spot 24f, it provides a circuit through relay contacts 'I08e now closed, contacts 810, and relay coil 89, to line 4I. Contacts 89a (Fig. 2) close to energize the punch" space control magnet I00 to cause the record card in the punch to be spaced for analyzation of the next column. Relay coil I08 (Fig. 2a) becomes energized once again in the manner previously described and a new series of impulses representing the perforation in the newly analyzed column is transmitted back to station A.

When a blank column. of the card is presented at the analyzing station, a spacing signal comprising a series of four impulses is initiated as willnow be explained. After relay coils 81 and I08 are energized in the previously described manner, the commutator arm 25, in passing over segment spots 24a to d, fails to complete a circuit to energize the relay coil I24 because none of the analyzing, relay contacts "b to 84b are closed at this time. The fact that coil -I24 remains deenergized, contacts-[24a remain closed to maintain relay coil 81 energized. Thus, when the commutator arm ngmssegmenz spot 24ee,

a circuit may be completed't'h'rough contacts "Md and 81b now closed, through relay coil I22, to line 41. Contacts I226 now close to energize relay coil 84 which in turn cause relay coils 83, 82 and ll to alao becomeenergized by parallel circuits created by the closing of contacts 84a, 83a, and 82a in succession. Accordingly. with contacts Olb to b now also 'closed,'.four impulses are successively transmitted by the next passage of the commutator arm 25 over the segments 24a to d. Reception of the four impulses at station A is indicative of the blank space in the column of the card at station lyzed.

Upon the-completion of transmission of the character impulses and space impulses for all columns of the card back to station A, the ejection of the card occurs following the operation of the last column contacts I6 and IIII. Contacts I6 open to deenergize relay coil 59. The pickup circuit to a coil I26 is thus broken by the opening of contacts 59a, although the holding circuit for that coil remains intact through con- B which was just anatacts 126a now closed and ejectcontacts I I5, the

coil I26 having been energized at the time the energization oi relay i1 58 caused the. closing of contacts 599. with clay coil I26 still energized its contacts I26b remain closed, and when last column contacts I III close, a circuit is completed to energize the stacker magnet I05 to eject the card.. The energization 'of the stacker magnet opens eject contacts H5 to deenergize relay I26. Eject contacts 91 (Fig. 21) are also operated at this time to deenergize the verifying control magnet I03.

Reception of the verification impulses at station A effects.the pickup of the correspondingrela'ys-RI through Rt (Fig. la), depending upon the signal impulses transmitted. Ina manner similar to that described for station B, energization of these 'relays and subsequent closure of relay contacts 55b effects printing of the proper character at station A. The reception of four impulses energizes the space magnet I30 to effect a spacing operation. The relay 53 at station A is energized after printing occurs and relay contacts 53a eflectthe reset of the chain relay system as previously described. The operator at station A now compares the printed data which was originally transmitted with the printed data which has just been received. If this data verifies, the operator depresses the card feed key l5 (Fig. 1) and printing and punching for a new record are effected. If the card fails to verify, the adjust key I! is depressed and causes a pickup of a green or red signal at station B. The signal circuits will be explained later. Such a signal at this time indicates to the B operator that the card failed to verify and accordingly the just punched card is removed. Adjustment is then made in a manner to be described presently. A new series of operations then ensues for the same data' and if this also fails to verify, it is understood that the machine is in need of repair.

In starting up and at various times it is necessary to adjust the dash-pot controls at both of the stations to insure proper timing of certain circuits associated with the receiving chain of relays. The present transmission system requires one or. more of a series of impulses to effect transmission of statistical data as already described. Eachimpulse of this series energizes a corresponding relay and causes deenergization of the one just preceding it. Because of this the pot controlled must close within a period deter-' mined by the speed of rotation of the transmitting commutator at station A. That is, the first of a series of impulses triggers off the dash-pot relay 55. The contacts controlled by this relay must not function before the time has passed when the last possible transmitting signal impulse might be received from station A.

Therefore, since the first impulse from station A triggers oil the dash-pot relay at B, if the time of closure of these points is checked by an additional impulse following the time of signal impulses, it is possible to determine if the adjustment is correct or not on the dash-pot relay. Means is provided to automatically effect correct adjustment at station B by the, signal of adjustment from station A and likewise station 13 to A. For the machine to be in adjustment, the contacts 55b must close following the completion of the signal impulses and while the arm 2| at station A is contacting segment spot 20m.

When starting up sending operations, for example, each morning prior to beginning transmission, the operator at station A begins the adjusting operations. Operator at station A dc, presses the adjusting key I! and operator at B opens receiving switch it prior to adjusting to prevent printing. Depression of key 11 effects not provided with the usual holding circuit through contacts at station B. Hence, relay R1 is energized only while thefarm 2| contacts segment 20m. If contacts ilcclose while relay R1 is energized, the dash-pot control. (Fig. 2') is in adjustment, and a circuit is completed as follows: line 46, relay contacts 550 now closed, relay contacts RIe now closed, contacts I3Ic, coil I33, to line 41. Relay I33 upon energization is held energized through its points I33a and relay con tacts 5Id and I201. Relay contacts 133a, in closing, light a green lamp in the holding circuit which informs the operator at station'B that his machine is in adjustment. Also, relay 63 is energized to open its 63a contacts and drop relay 55. Operator at B would then begin sending an ad justing impulse to station A to operate similar circuits at the latter station in a manner to be described shortly.

If the dash-pot control at station B is too rapid, the sequence of events is as follows: The contacts 55e become closed before the adjusting impulse opens contacts RIg and relay coil I3I is energized by a circuit from line 46, contacts 556, contacts RIg, relay coil I3I, to line 41. Relay coil I3I is held energized through contacts I3Ia and contacts 5Id and I20 Contacts I3Ib close to energize relay coil I32 when RIh closes, coil I32 being then held through contacts I320, 5Id andI20r. Relay contacts I32a, in closing, light a red lamp in the holding circuit to show that the adjustment is not correct.

If the dash-pot control at station B is too slow, contacts R'If open and close before contacts 55d open and thus relay coil I34 -is energized. Also, coil I3I is energized, but coil I32 is not energized at this time. A red light in the holding circuit indicates machine is still.- out of adjustment. The energization of coil I 34 automatically efiects an adjustment of the dash-pot mechanism to speed up the relay action by closing points I30b and energizing the adjusting magnet I35 (Fig. 2a) which causes shaft '6 (Flgr' 6a) to rotate counterclockwise to effect a speeding up of the dash-pot action by increasing the size of the opening I as has been previously explained. Closure of I32b points energizes magnet I36 to slow up the dash-pot action by causing a clockwise rotation of shaft 6.

To transmit an adjusting impulse from B to A the adjust key I04 is depressed to energize relay coil I20 (Fig. 2). Relay I20 is then heldthrough its contacts I20a and normally closed contacts I38d in parallel with CC6. The I20e contacts (Fig. 2a), in closing, cooperate with the shifting of contacts I20b to provide a circuit for picking up relay coil I38 when arm 25 contacts spot 249. The I38b'contacts then close to provide for transmitting the adjusting impulses through the contacts I201; 7, h, k, m, and the transferred contacts I200. An impulse circuit may be traced as follows: from line 41, resistance II2, contacts I200 in a shifted position, contacts I382) now closed, contacts I20), I20g or I20h, etc. now closed, corresponding commutator segment 24a, 24b, or 240, etc.,' arm 25, contacts I206 to line 46. The last impulse occurs when arm 25 is on segment 24e and effects adjstmuent at A in a manner similar to that already described for station B.-

The operator at A seeing his adjusting lights flashing knows station B is in adjustment, and that he may discontinue transmission of his adjusting signal to station B; Station A being in adjustment, the operator there sends back ,a

single adjusting impulse to station B which indienergized and opens its 5Id points, or when contacts I 201 open upon sending an adjusting signal.

Relay coil I20 (Fig. 2) is held energized through contacts I38d and CC-B in parallel.

circuit of coil 55 is open, and it is necessary therefore that coil 5|, when energized, remains in its operated condition long enough to drop coil 63. Coil 5| is then deenergized in a previously described manner and its contacts 5Ic close to pick up coil 55 once again.

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:

l. A data recording system comprising a first station having therein a primary recording means to record original data, a primary data transmitting means, and a data verifyingmeans; in combination with a second station having duplicating means controlled by the transmitted data for duplicating the data on a multi-column record, one column of data being duplicated in a corresponding column of the record upon each operation of, the duplicating means, spacing means controlled by and operated as an incident to the duplicating means upon each operation thereof to space therecord so as to bring the next data-receiving column of the record into alignment with the duplicating means, record analyzing means for analyzing the columns of the record successively for duplicate data thereon, and a secondary transmitting means controlled by the analyzing means upon analysis of each data column for operating the data verify- 7 Contacts CC-6 close before coil I38 is energized to open its contacts I38d, but contacts CC-6 open before ing means directly in accordance with the analyzed" duplicate data to provide a comparison between the latter data and the original data at the first station.

2. A data recording system comprising a first station having therein a primary recording means to ,record original data,,a primary data transmitting means, and a data verifying means; in combination with a second station having perforating means controlled by the transmitted data for perforating the data in a niulti-column record, one column of data being perforated in acorresponding column of the record upon each operation of the" perforating means, spacingmeans controlled by and operated as an incl,- dent to the perforating means upon each operation thereof to space the record so as to bring the next data-receiving column of the record into alignment with the perforating means, record analyzing means foranalyzing the columns ofthe record'successively for data perforations therein, and a secondary transmitting means controlled by the analyzing means upon' analysis of each data column for operating the data verifying means directly in accordance with the analyzed data perforations on the record to provide a comparison of the latter data with the original data at the first station.

3. A data recording system comprising a first station having therein a primary recording means to record original data, a primary data transmitting means, and a data verifying means; in combination with a second station having duplicating means controlled by the transmitted data for duplicating the data on a multi-column record, one column of data being duplicated in a corresponding column of the record upon each operation of the duplicating means, spacing means controlled by and operated as an incident to the duplicating means upon each operation thereof to space the record so as to bring the next data-receiving column of the record into alignment with the duplicating means, record analyzing means, record feeding means effective upon analysis of the last column of data in the corresponding column of the record for feeding therecord into a predetermined position to bring the first of the columns of the record to receive the data into operating alignment with the analyzing means, means controlled by the analyzing means for operating the spacing means to present in succession to the analyzing means the columns of duplicate data on the record, and a secondary transmitting means alsocontrolled by the analyzing means upon analysis of each colunm of the record for transmitting the analyzed duplicate back to the first station to operate the data verifying means accordingly to compare the latter data with the original data at the first station.

4. A data recording system comprising a first station having therein a primary recording means to record original data, a primary data transmitting means, and a data checking means; in combination with a second station having perforating means controlled by the transmitted data for perforating the data in a multi-column record, one column of data being perforated in a corresponding column of the record upon each operation of the perforating means, spacing means controlled by and operated as an incident to the perforating means upon each operation thereof to space the record so as to bring the next data .receiving column of the record into alignment ord having data perforations, and a secondary transmitting means also controlled by the sensing means upon the sensing of each of said columns of. the record for transmitting the sensed data from the record back to the first station to operate the data checking means.

5. A data recording system comprising a trans- I mitting station having therein a primary recording means to record original data, a primary means to transmit primary impulses representing said original data, and data comparing means; in combintion with a receiving station embracing therein receiving means-including a plurality of serially arranged relays adapted to be energized in succcssion'by and in accordance with the transmitted impulses, perforating means controlled by the last energized relay in the series to perforate the data on a multi-column record, a column of data being perforated in a corresponding column of the record upon each operation of the perforating means, record analyzing means for analyzing the columns of the record successively for data perforations therein, and a secondary transmitting means controlled directly by analyzing means upon analysis of each data perforation in the record for transmitting secondary impulses representing said data perforation to the data comparing means to effect a comparison between the data represented by the latter-impulses and the corresponding original data at the transmitting station.

6. In combination, a transmitting station including therein means to transmit primary impulses representing original data during a predetermined time interval, a primary recording means operated as an incident to and in accordance with the operation of the transmitting means to record the original data, and data comparing means; and a receiving station embracing therein means for receiving said impulses, perforating devices controlled selectively by the receiving means in accordance with the transmitted impulses for perforating a multi-column record, time delay means for rendering the receiving means ineffective to operate the recording means until after a time delay corresponding to the predetermined time interval, analyzing means operable after a predetermined number of columns of the record have been perforated for analyzing said columns successively for perforations therein, and means controlled by the analyzing means directly upon analysis of each perforation in the record for operating the data comparing means to efiect a comparison between the data perforated in the record and the corresponding original data at the transmitting station.

'7. In combination, a transmitting station including therein transmitting means for transmitting primary impulses representing original data, a primary recording means operated by and as an incident to the operation of the transmitting means for recording said original data, and data matching means ;and a receiving station remote from the transmitting station comprising receiving means responsive to the transmitted impulses, perforating means controlled by the receiving means for making data-representing perforations in predetermined portions of a record card, means operable following the reception and perforation of the data for analyzing said portions of the record successively for said perforations, and a secondary transmitting means controlled solely by the analyzing means and rendered effective upon analysis of each of the portions of the record for sending secondary impulses representing the perforated data therein to the transmitting station to operate the data matching means to compare the perforated data represented by the secondary impulses with the original data at the transmitting station.

8. In combination, a transmitting station including therein transmitting means for transmitting primary impulses representing original data characters, a primary recording means operated by and as an incidentto .the operation of the transmitting means for recording said data characters, and data matching means; and a receiving station remote from the transmitting station 'comprising receiving means responsive to the transmitted impulses, perforating means controlled by the receiving means for perforating the data. characters in a record card, card feeding means to feed said record to the perforating means, and means normally operating said record feeding means at a time following the occurrence of a predetermined number of perforating operations to feed a fresh card to the perforating means, means to suppress the card feeding means at this time and concurrently to cause the refeeding of the perforated card, analyzing means adjacent the perforating means for analyzing the perforations in the latter card successively, and

to the transmitting station to operate the data matching means accordingly to compare the data characters from the card represented by the secondary impulses with the corresponding original data characters.

\ JAMES W. BRYCE.

Images