US2036029A - Perforated card verifier - Google Patents

Description

PERFORATED CARD VERIFIER Filed April 28, 1928 4 Sheets-Sheet l 31, 1%.. B. K. F. EWALD 9 B. K. F. EWALD ZJUMNEQ PERFORATED CARD VERIFIER Filed April 28, 1928 4 Sheets-Sheet 2 31, 1936.. I 3 1; EWALD i PERFORATED CARD VERIFIER Filed April 28, 1928 4 Sheets-Sheet 3 FIGA.

4 6 Evwamiop Mmh 31,, 19%., B K, F EWA D zmwzg PERFORATED CARD VERIFIER Filed April 28, 1928 4 Sheefs-$heet 4 Patented Mar. 31, 1936 UNITED STATES PATENT OFFICE PERFORATED CARD VERIFIER Bernhard Karl Fritz Ewald, Villingen, Germany,

assignor, by mesne assignments, to International Business Machines Corporation, New York, N. Y., a corporation of New York Application April 28, 1928, Serial No. 273,636 In Germany December 8, 1927 9 Claims. (Cl. 73-51) The object of the invention is to provide a veriment of parts shown in the accompanying drawfier for completely checking the punching of a ings and described in the following specification, card both as to whether it contains perforations wherein like reference characters indicate like in selected position and as to whether it contains parts.

no superfluous perforations. In the drawings: 6

Heretofore verifiers have been confined in their Fig. l is a general diagrammatic view of the operation to determining whether holes have machine; been punched in selected positions, leaving the Figs. 2 and 3 are detailed views of the control possibility of superfluous punching unchecked. box containing the controlling pins.

According to the present invention the card is Fig. 4 is a detailed section on line 44 of 10 verified in all positions, giving notice to the op- Fig. 5; erator if a position which should be punched is Fig. 5 is a detailed section on line 5-5 of not or if a position which should not be punched Fig. 4; is perforated. There are many different ways in Fig. 6 is a detailed section on line 66 of which these results may be realized but the pres- Fig. 5; 1'5 ent explanation will be confined to a single ex- Fig. 7 is a detailed section on line l---'! of Fig. 5. ample which at present is believed to be the pre- This machine may comprise a base I having ferred form of practicing the invention. slidabl-y mounted and guided therein a carriage This preferred form consists of a set of con- 2 on which is a clip 3 adapted to carry a record trolling pins, one for each punching position of card 4, (Fig. 1). Said carriage is biased to the 20- the card and a similar set of verifying pins one left by means of spring 5 attached to the base i coacting with each of the controlling pins. The at one end and the carriage 2 at the other. At controlling pins and verifying pins are located the end of the carriage opposite said spring is on opposite sides of the cards. During a verifysecured a nut 6 cooperating with a spiral groove ing operation the controlling pins are all moved in a shaft 1 known hereinafter as the release 25 against the card and any one of them which en-' shaft. At one end of the release shaft is an escounters a perforation moves through the card capement sprocket 8 normally held from turning and projects on the other side of it. The veriby suitable pawls to be described later. When fying pins are individually operable and only the escapement sprocket is released by said aforethose corresponding to positions in which a permentioned pawls after the completion of a veri- 30 foration should occur are operated. These likefying cycle, it rotates clockwise a distance of one wise move toward the card and the particular tooth on the sprocket due to the influence of the ones selected will push the corresponding controlnut 8 on the carriage being biased to the left by ling pins back into position if they have enspring 5, until such time as the carriage has countered a perforation and are projecting reached the end of its travel at the extreme left through the card. If holes are not punched in or stop position.

the card positions corresponding to the operative A plurality of verifying pins 9 are provided, one verifying pins the latter are stopped in their pin for each index point position in a single coltravel when they encounter the card, their travel umn of the record card and spaced apart the in this case being considerably less than when same as said index point positions so that when 40 they push a controlling pin back through the acolumn is moved into proper position under said card. The release of the card for feeding to the pins one pin will be in position over each index next verifying position or for removal from the point so that when any pins are depressed they machine may only occur when no controlling pins will abut the card directly on their respective 4 are projecting through it and when all verifying index points or if the index points below the depins which are operated are permitted to travel pressed pins are perforated said pins will pass a sufficient distance to push a controlling pin through the perforations. For the sake of clearback through the card to its normal position. If ness only three of the verifying pins are shown any operated verifying pin does not travel its in Fig. 1. The escapement sprocket 8 and the full distance the card will not be released. It release shaft 1 provide the means for moving the 50 is thus obvious that only cards which have percarriage 2 and therefore the record card 4 step forations corresponding to the operated veriby step past the ends of the pins 9. Said escapefying pins and which have no other perforation ment sprocket and coacting pawls are adjusted will be passed by the machine. to halt the carriage each time so that one of The invention is exemplified in the arrangethe columns of the record card 4 carried by said 55 carriage is aligned in the proper position under the verifying pins.

The pins 9 are slidably mounted in the frame shown diagrammatically at 10, said pins being normally held upwardly away from the record card by means of springs I l. A plurality of levers I2 pivoted at [3 on a horizontal beam member I4 abuts one end of the verifier pins at [5. The ends of said levers opposite their pivots abut a series of depressible keys l6. These keys are slidably mounted in the frame of the machine diagrammatically indicated at I! and are held upwardly by springs l8. Each key is provided with an indication corresponding to the indices on the record card and actuates when depressed its respective verifier pin cooperating with the index point position on the card corresponding to the key index.

The horizontal beam member [4 is fixed at each end to a link l9, (only one of which is shown for the sake of clearness) said links being pivoted at 20 to a boss 2| on the base I. This beam is biased downward by the spring 22 and normally held in this position as shown in Fig. 1. Below the levers l2 and running transversely of the machine is a press beam 23 rotatable about an axis 24 journalled in the frame of the machine diagrammatically shownat 25. Assume a record card is under the verifying pins, when a key 18 is depressed, its respective coacting lever I2 is moved clockwise about the pivot [3 moving downward the verifying pin 9 with which it coacts. If there is a perforation in the index point position of the record card corresponding to the depressed verifying pin, said pin will be displaced to the full extent of its downward travel and the lever l2 will thereby come in contact with the press beam 23 at the point of contact designated by the reference character 26 on the lever 12 causing it to rotate counterclockwise about its axis 24 rotating with it an arm 21 rigidly attached to one end of said axis. The end of said arm abuts two plungers 28 and 29 slidably mounted in the frame of the machine as indicated at 30 so that the counterclockwise rotation of said arm depresses the said plungers. The depressing of the plunger 28 causes an arm 3| of a bell crank lever pivoted at 32 to turn counterclockwise about its pivot. The other arm 33 of said bell crank terminates with a pawl 34 which becomes engaged with the escape sprocket 8 on the aforesaid movement of the bell crank. The plunger 29 has at its lower end a fixed perpendicularly projecting arm 35 which cooperates with one arm 36 of a bell crank pivoted at 37 so that when plunger 29 and therefore arm 35 s depressed the arm 36 is moved counterclockwise about its pivot 31 disengaging a pawl 38 attached to said arm, from the escape sprocket 8. Upon release of the key l6, said key and its respective verifying pin 9 are returned to normal position by means of the springs l8 and II respectively. The press beam 23 is returned to its normal position by the plungers 28 and 29 which are biased upwardly by means of springs 39 and 40 attached to bell crank arms 3| and 36 respectively coacting with said plungers. The depression and release of said key l6 constitutes a complete cycle of the mechanism just described and permits the escape sprocket 8 to turn one tooth in a clockwise direction thus displacing the carriage 2 one step to the left sufficient to align the next successive column of the record card under the verifying pins inasmuch as the operation just described has verifled the fact that a perforation existed at the index point in question.

Had there been no perforation at this index point the depression of the key l6 would have caused the pin 9 to make contact with the record card thus arresting its downward travel before the full downward travel of the key l6 was completed. The stopping of the pin 9 causes the lever [2 to pivot about said pin at [5 and through its pivoted connection I3 with the horizontal beam l4 causes said beam to be raised about its supporting pivots 20. A latch 4| is biased against the end of beam I4 by a spring 42 so that when the beam I4 is lifted clear of said latch the spring 42 causes said latch to be displaced to a position under the beam l4 said latch being supported by a pivoted bearing indicated at 43. The beam l4 now being locked by said latch in its raised position prevents any of the other keys from cooperating with their respective verifier pins 9. Changing the pivotal point of the lever 12 from l3 to l5, as previously explained, shortens the linear travel of the point 26 on the lever l2 so that said point does not come in contact with the beam 23, thus no displacement of said beam occurs and the feeding mechanism remains quiescent so that the card is not fed. This indicates to the operator that there is an error in the perforations of the record card and said card is then removed by the operator in a manner to be explained later.

Below the record card 4 and directly underneath the verifying pins is a casing 44 which houses a series of control pins 45 together with their operating mechanisms (Figs. 1, 2 and 3).

The number of control pins 45 correspond with the number of verifying pins 9 and one control pin is located diametrically opposite each verifying pin so that when said control pin is in its upward position and said verifying pin is displaced downward the ends of said pins will abut each other. The control pins 45 are slidably mounted in a frame 46 and are supported by levers 41 which pass through a slot formed in the lower part of the control pins said levers being free to slide back and forth in said slots. At one end of the levers 41 is an enlarged portion containing therein an elongated hole 48 through which passes a shaft 49 common to all said levers.

Springs 50 attached to the frame and to each lever bias these levers to the left as shown in Fig. 3. The enlarged portion also forms a shoulder 5| with which the teeth on the push bar 52 coact to displace the levers 41 to the right when said push bar is in the position as shown in Fig.

2. Springs 53 anchored to a fixed rod 54 engaging the extreme left end of the levers 4! bias these levers upwards to raise the controlling pins 45 to the position as shown in Fig. 2. A shoulder 55 on the levers 41 coacts with a bar 55 fixed to the frame to prevent the displacement of said levers to the left when the push bar 52 is retracted so that its teeth no longer abut the shoulders 5|. The top of the shoulder 55 forms a wide portion of the levers and serves to hold said levers downwardly when said wide portion is under the bar 56 therefore holding the control pins in their down position whenever the levers 41 may be displaced to the left as shown in Fig. 3.

A locking bar 51 slidably mounted in the frame is provided with a series of grooves 58 and raised portions 59. At the end of said bar a lever 60 is pivotally mounted by which said locking bar may be displaced to the right or left according to the function of the machine which will later be explained fully. When the locking bar 51 is dis placed to the right the grooves 58 align themselves with the levers 41 so as to permit said levers to enter said grooves when it is desired to raise the control pins 45. When the looking bar 51 is displaced to the left the raised portion 59 is brought opposite the levers being displaced upwardly and thus prevent the pins from being raised. The push bar 52 having a lever 16 pivotally connected to one end is provided with a series of teeth 6| corresponding to the number of levers 4! and with a corresponding space between each tooth. When the push bar 52 is displaced to the right, the teeth 6! coact with the shoulders 5| of the levers 41 displacing said levers to the right thereby removing the wide portion of said levers from under the bar 56. With the lock bar 51 positioned so as to align the grooves 58 with the levers 41, said levers will now be moved upwards by the action of springs 53 and the control pins 45 will project upward as in Fig. 2. When the push bar 52 is retracted to the left the teeth 6| are disengaged from the shoulders 5| and the spring biases the levers 41 to the left. The shoulder 55, however, now abuts the bar 56 and prevents the movement of the lever El to the left by said aforementioned spring. It can now readily be seen that if a member, in this instance one of the verifying pins 9, should abut the end 45a of one of the control pins and press it down, its corresponding lever 41 would also be pressed down and the shoulder 55 be comes disengaged from the bar 56 so that the lever 41 is moved to the left by the action of the spring 56 thereby bringing the widened portion of the lever under the bar 56 and locking said lever down so that when that member or verifying pin pressing on the pin 45a is withdrawn upward said pin 45a will remain in its down position. Restoring bar has a series of teeth 63 corresponding to the number of levers 41 and similarly spaced apart, which coact with the extreme left end of said levers to move them downwardly. When the restoring bar 65 is displaced to the right its teeth 62 are out of engagement with the levers 4?. Assume now the control mechanism to be in the position shown in Fig. 2. When the restoring bar is displaced to the left the teeth 63 coac't with the levers '41 and earn them down so that their respective shoulders 55 become disengaged from the bar 56 and therefore the'springs 56 displace the levers to the left so that they are locked down as previously explained, thus restoring all control pins to their downward positions.

When a record card is in the machine, therefore over the control pins, and the push bar 52 is displaced to allow the control pins 45 to be moved upwards as previously explained, only such pins as may be opposite perforations in the record card will be moved upward through said perforations, the remaining pins being retained in their lowered position having been prevented from rising by theunperforated portion of the card. If the key or keys I6 corresponding to the perforated index points are pressed down their respective verifying pins 9 will move downward against the corresponding control pins 45 pressing them down and locking them as explained and upon the restoration of the verifying pin 9 the carriage and card will move forward through the release of the escapement mechanism 8 as previously explained. It will be understood that where more than one hole in a column is to be verified, the keys l6 corresponding to the positions to be tested are pressed down concurrently. If, however, in addition to those perforations which were intended and which were verified in the manner just explained, there is an additional hole in the record card column in question which was placed there through an error, the control pin which projects through this perforation will not have been pressed down by the verifying pins and therefore when the card carriage is released it will be prevented from advancing by this control pin extending through the per oration, thus keeping its respective levers 4! in its groove 55 thereby keeping the locking bar 5'! locked in its right hand position which prevents the carriage from escaping as will later be explained.

If no perforations are-present at an index point position on the card, the verifying pin will be prevented from being depressed which will prevent the card from being fed in the manner already described. It will thus be seen that any error in punching the card will be indicated by the failure of the card carriage to feed.

When such a condition due to errors occurs the next step is to remove the card and make the necessary corrections. To do this the handle 6:! on the end of the restoring bar 65 is pressed to the left (Fig. 1). This displacement of the bar 65 to the left restores the controlling pins ill to the downward position as previously explained and also moves a lever 66 pivoted at 6'! in a counterclockwise direction by means of a yoke and collar connection 68 with which said restoring bar cooperates with said last named lever. The opposite end of the lever 66 is pivotally connected to a rod 69 slidably mounted and extending through the frame as indicated at it. The end of said rod indicated at l! is formed upward and coacts with the downward extending arm of the bell crank so when said lever Bil is displaced to the right, the movement of the lever 66' clockwise, displaces the rod 69 to the right and its turned up portion H coacts with the bell crank 36 to move it counterclockwise about its pivot 31 thus withdrawing the retaining pawl 38 from the escapement sprocket 8 leaving said sprocket free to rotate. The sprocket 8 and therefore the card carriage 2 being no longer restrained said carriage is moved to its extreme left hand or start position by the action of the spring 5. The restoring bar 65 is returned to its normal position by the action of the spring 48 through the linkage just described. It was previously stated that when verifier pins 9 failed to locate a perforation when depressed, the horizontal beam II was raised and the latch 4! moved under said beam thus locking the beam in its upward position thereby rendering all keys inoperative. On the restoring bar 65 is a projec ing piece 12 adapted to engage with an enlarged end 13 of the latch 4|. When the restoring key 65 is moved to the left the projection 12 engages the enlarged end T3 and moves the latch 45 in a clockwise manner about its pivot 43. This withdraws the said latch from under the horizontal beam M permitting the beam to drop back to its normal position under the influence of the spring 22.

When the press beam 23 is rotated and therefore rotates the arm 21 as explained, said arm acts upon an arm 14 of a bell crank pivoted at of its travel in which position all of the control pins 45 are in their up position. The rotation of the arm 21 acting on bell crank arm 14 turns said bell crank clockwise about its pivot 15 and through arm 16 displaces the push bar 52 to the left thus disengaging the teeth 6| from their locking position in connection with the levers 41 (Fig. 2). On the plunger 29 which is also moved downward by the arm 21 is a projection 18 on which rests an arm of a locking lever 19 pivoted at 80. As the plunger 29 moves down the locking lever moves with it about its pivot and drops into a groove 8| of the push bar 52, this locks said push bar in position to prevent its being moved and therefore acting upon the controlling pins 45 until after the press beam 23 has been restored thus completing the cycle and permitting the card to be fed to the next column.

A lever 60, one end of which is pivoted at 82, is pivotally attached at its opposite end to the locking bar 51. Said locking bar is biased to the left by the spring 83 attached to said lever. When the controlling pins are up preparatory to operating the varifying keys I6 the locking bar 51 is at the right hand limit of its travel and held in that position by the levers 41 in the grooves 58 previously explained (Fig. 2).

Fixed to the arm 21 is a latch member 84 adapted to cooperate with a latch member 85 fixed at one end of a lever 86 pivoted at 81. Said lever is biased counterclockwise about its pivot by a spring 88. At the end of said lever is also a projecting lug 89 which overlaps the path of travel of the lever and is adapted to be moved by said lever in a clockwise direction. When the arm 21 rotates downwardly the latch member 85 books over its coacting latch member 84, having been moved into position by the action of spring 88 on the lever 86, provided one or more of the controlling pins are still in their upward position, thus preventing the displacement of the locking bar 51, and therefore link 60 to the right. With the latches thus engaged the arm 21 is locked down and the escapement of carriage 2 is prevented thus indicating an incorrect perforation. The restoring bar is then moved to the left by manual operation of the key 64 which will withdraw all controlling pins 45 by causing all levers 41 (Figs. 2 and 3) to be withdrawn from notches 58 which will permit the locking bar 51 and the lever 60 to move to the left under the influence of the spring 83. When said lever 60 moves to the left it coacts with the projection 89 moving the same together with the latch member to the left whereby the latch members 85 and 84 become disengaged and the arm 21 is raised by the action of the springs 39 and 40 as previously explained. The raising of the arm 21 and therefore the plunger 29 withdraws the lock lever 19 from the notch 8| and the push bar 52 is permitted to move to the right by the action of the spring 11. At the lower end of the bell crank arm 16 and the lever 60 are two overlapping projections 90, one attached to each lever and adapted to coact with each other so that when the arm 16 moves the push bar 52 to the right as just explained, its projection abut the projection on the arm 60 carrying said arm along in the same direction thus displacing the locking bar 51 to the right so that the notches 58 will again be aligned with the levers 41 to permit said levers to drop into said notches when acted upon by the teeth of the push bar 52.

It is obvious that depression of beam 23 independently of keys I6 will cause an escapement action to take place provided the column of the card in sensing position contains no perforation in any of its index point positions. For this spacing operation beam 23 may be rocked directly by the operators finger or a suitable key stem may be provided for the purpose. If, however, a perforation is present in some position when the beam 23 is actuated for spacing, displacement of bar 51 will be prevented as explained above and spacing will consequently not be effected.

Provision is made to lock both the restoring bar 65 and the locking bar 51 so that they may not be moved when there is no record card in the machine or, when a record card is just placed in the machine, until said card has been moved to its starting position at the extreme left in which case the first column will be in position to be verified. To accomplish this a carriaige lever 9| is fixed to a rod 92 pivotally supported by bearings 93 in the frame of the machine. Said carriage lever extends at an oblique angle from the rod 92 so that the end of the carriage lever projects into the path of travel of the turned down portions of the carriages 94 and 95. Said card lever 9| is so placed relative to the travel of the machine that when the carriage 2 is moved to its extreme left position the turned down portion 95 coacts with the card lever 9| to turn it counterclockwise which causes the looking up of the restoring bar 65 and the locking bar 51 in a manner to be explained later. When therefore the carriage 2 is moved to the right these two last mentioned bars remain locked until the carriage has moved to the end of its travel at which time the turned down portion 94 of the carriage comes in contact with the carriage lever 9| turning it clockwise to take the position shown in Fig. 1 thereby unlocking the restoring bar 65 and locking bar 51. These bars then remain unlocked until the carriage 2 again reaches the right hand limit of its travel.

The method of locking the two bars just mentioned is as follows: at the end of the rod 92 opposite the carriage lever is fixed a cross arm 96. The right end of said cross arm as viewed in Fig. 1 is formed up in an S-shaped member 91 the top left hand configuration of the S-shaped member is adapted to coact, when in its lowered position as shown in Fig. 1, with a similar, though reversely formed end 98 of a bell crank arm 99 so that the clockwise turning of the arm 96 causes the formed member 91 to cam the bell crank arm 99 pivoted at I00 in a clockwise direction about said pivot thus raising its other arm IOI out of the notch I02 in the locking bar 51 with which it is engaged when no card is under the verifying pins. The. bell crank arm I0| is biased down by the spring |02a so that when the cross arm 96 turns in a counterclockwise direction the contour of the formed end of the bell crank arm 99 conforms with the lower right hand configuration of the S-shaped member 91 through the influence of spring I 02a, as explained, thus permitting the bell crank arm IN to drop into the slot I02 locking the locking bar 51.

At the left hand end of the cross bar 96 as viewed in Fig. 1 is fixed a link I03 the upper end of which is formed into a loop through which extends the end of a lever I04 pivoted at I01. Said lever is biased downward by means of a spring I05 and is adapted to engage a notch I06 to lock the restoring bar 65. In the position shown in Fig. 1 the lever I04 is held up by the bottom of the loop and out of engagement with the notch I05. When the carriage lever 9| is moved counterclockwise by the member 95, as previously explained, the cross arm 96 likewise moves in the same manner. When said cross arm moves thusly the lever I04 engages the notch I06 to lock the restoring bar 65, the loop in the end of lever I93 permitting a free movement should the lever I04 drop onto the top of the bar 65 rather than in the notch should said bar be displaced to the left to release the card carriage in event of an incorrect punching locking up the feed as previously described.

It will be seen from the foregoing detailed explanation of the working of the various mecha nisms that there are three possible different ways Third, where the card column to be verified contains incorrect perforations with no hole existing in one or more correct positions.

With the detail description of the working parts of the mechanisms in mind a general explanation of the operation of the machine under the three conditions just stated may be readily understandable. Regardless of what class of operation the machine may come under as determined by the status of the perforations in the card column, the operation is the same in all cases up to the point of bringing the first card column into verifying positions, which is as follows:

A record card 4 is placed in the card carriage 2, said carriage being now at its extreme left hand position. The carriage is then moved manually to the right until the first card column to be verified, at the left end of the card is in alignment with the Verifying and control pins. When the card carriage thus reaches its right hand limit of travel the carriage lever 9| is turned in a clockwise direction thus unlocking the bars 51 and 65. The unlocking of the bar 5'! permits the spring I! to move the push bar 52 to the right and by means of the projecting pieces to move'the locking bar 51 to the right against the tension of the spring 83 thus permitting the control pins 45 to be thrust upwards through whatever perforations exist in the column about to be verified. Prior to unlocking the bar 51 said bar is held displaced in its extreme left hand position and through the projections. 90 holds the push bar 52 displaced in its extreme left hand position thus keeping the controlling pins locked down to permit the edge of card 4 to be moved past said pins when the card is inserted. Upto this point the operation of the machine is common to all the three classes of operation previously mentioned.

Correct perforations Assuming now that the perforations in the column are correct. When the keys "5 corresponding to the perforated index points are pressed, the verifying pins 9 are depressed downward through the card perforations thus forcing the controlling pins 45 downward out of the card perforations and permitting them to become locked down by the movement of the levers 41 to the left under the bar 55. In this operation of the keys IS the press beam 23 is tilted causing the push bar 52 to be moved to the left and locked by the locking lever 19 being dropped into the notch BI and at the same time releasing pawl 38 from and engaging pawl 34 with the escape sprocket 3. With all control pins 45 down the locking bar 51 moves to the right to lock them down and as the keys [5 are released the pawls 34 and 38 are restored to their original positions releasing in this cycle of operation, the sprocket Wheel 8 to permit the card to be moved to the left to the next adjacent column after which the locking lever 19 is lifted out of the notch 8| permitting the push bar 52 to move to the right and to carry with it the locking bar 51 to again permit the control pins to be projected upwards through the perforations in the new column presented for verification.

In this case it is assumed that the column to be verified has correct perforations punched therein and in addition also has one or more perforations which should not exist there. The control pins 45 now projecting through all perforations in the column as previously explained, the keys H; are operated in the usual manner. Those keys corresponding to the correct perforations are depressed thus locking down their corresponding control pins 45. The control pins, however, project through the additional incorrect perforations in the column which cause the locking bar 51 to remain held in its right hand displaced position (Fig. 2) due to the levers 41 cooperating with the upwardly projecting control pins 45 remaining in the notch 58 of said locking bar. The holding of said bar to the right permits the latch 85 to be moved into locking position by the spring 88 thus locking down the press beam 23 to prevent it from being restored to its normal position and completing the cycle which is necessary to allow the carriage 2 to escape. The carriage is thus held which indicates that an error has been made in perforating the column now being verified. The restoring bar 65 is now moved to the left by the operator pressing key 64 which causes the controlling pins 45 to be withdrawn from the perforations and at the same time releases the escapement 8 through the link 69 so that the card carriage 2 is moved to its extreme left position. in order that the record card 4 may be removed to be destroyed or the column in question corrected. The movement of the locking bar 5'! to the left carries with it the projection 89 thus unlocking the latch 85 which now permits the press beam 23 to be restored and complete its cycle. The card having now been displaced to the extreme left the carriage lever 60 is moved counterclockwise by the member thus causing the bars 5'! and 65 to be looked as previously explained, thus locking down the controlling pins 45 to permit another card to be placed in the machine.

Incorrect perforations with no hole existing in one or more verified positions verified was supposed to have been perforated. There being no hole in one or more of these index point positions the verifying pin 9 strikes the card 4 which arrests its travel and the key lever l2 pivoting about |5 tilts the horizontal beam M which is latched up in its raised position by the latch 4|. The raising of the pivot H! by this means prevents the key lever B from depressing the press beam 23 and thus preventing the card carriage 2 from escaping which, as heretofore stated, indicates an error in the perforations in the column being verified. The restoring bar is now moved to the left by the operator, as before mentioned, thus restoring the control pins 45 and releasing the carriage 2 which is moved to the left so that the record card may be removed. A projection 12 on the restoring bar 65 moves the latch 4| from its locking position, when said restoring bar is thus moved to the left, so that the horizontal beam I4 is restored to its original position. The control pins 55 are again locked down by virtue of the portion 95 of the card carriage 2 coacting with the carriage lever 9|, said pins remaining locked. down until a new card is inserted and moved to the right to its starting position.

While I have 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. I intend to be limited therefore only as indicated by the scope of the following claims:

1. A perforated card verifying machine comprising a card carriage and escapement mechanism therefor, a plurality of concurrently operable verifying pins, operating keys therefor, said pins being movable through a perforation in each perforation receiving position of a card column, common means separately controlled by the several verifying pins and actuated by said keys to release said escapement mechanism for a carriage feeding step, and means cooperating with each perforation receiving position in a card column upon concurrent operation of a plurality of keys to prevent release of said escapement mechanism on the occurrence of perforations in positions of the card column less by one than those whose pins are concurrently operated.

2. A perforated card verifying machine comprising a card carriage, a plurality of controlling plungers, one for each perforation receiving position of a card column, escapement mechanism for said carriage to permit step by step movement of the same, means controlled by each of said controlling plungers to lock said escapement mechanism against step-by-step operation on the occurrence of a perforation in a card, a plurality of concurrently operable verifying pins corresponding to the controlling plungers and individually operable to suppress control of the looking means by the corresponding individual controlling plungers, and means for preventing said suppression when the number of plungers operated to lock said escapement is less than the number of pins concurrently operated.

3. A perforated card verifying machine comprising a card carriage and escapement mechanism for effecting step-by-step movement of the same, a plurality of controlling pins, one for each perforation receiving position of a card column, means for forcing said pins against a card on the carriage to permit those which encounter perforations to project through the card, means controlled by the controlling pins for locking said escapement mechanism against step-by-step operation when any one of said pins projects through the card, a verifying pin and an operating lever therefor for each controlling pin, movable means forming a common pivot for said levers, and normally holding the levers in operative relation to said escapement mechanism, means controlled by said verifying pins for causing unlocking of said escapement and means effective upon concurrent operation of a number of levers different from the number of controlling pins projecting through the card for causing a displacement of said common pivot means whereby said unlocking of the escapement by the verifying pins is prevented.

4. The invention set forth in claim 3 in which means is provided for retaining said common pivot means in displaced position.

5. A perforated card verifying machine comprising a card carriage, escapement mechanism for effecting step-by-step movement of the carriage to advance a card thereon column by column, a row of controlling pins, one for each perforation receiving position of a card column, a row of verifying pins, equal in number to the controlling pins, located oppositely thereto and concurrently operable, means operative after each carriage escape for effecting movement of all said controlling pins to permit any which encounter card perforations to project therethrough, means for immediately locking said escapement mech anism against step-by-step operation when any controlling pin projects through a perforation, and means for individually moving said verifying pins to permit them to move through card perforations to unlock said escapement and common means for preventing the unlocking of said escapement mechanism on movement of a number of controlling pins through card perforations less by one than the number of verifying pins concurrently operated.

6. A perforated card verifying machine comprising a plurality of verifying pins, one for each perforation receiving position of a card column, with individual means for concurrently moving the same through card perforations in the several positions, a plurality of control pins one for each perforation receiving position of a card column, means for feeding a card step-by-step to bring its several columns into alignment with the verifying and control pins, means for moving said control pins toward the card after each feeding step, means controlled thereby for preventing further step-by-step card feed when a single control pin passes through a perforation, means controlled by a verifying pin on moving through the same card perforation for re-enabling card feed and means operative when an additional verifying pin is concurrently moved for preventing the operation of said re-enabling means.

7. In a verifying machine, the combination with a sensing station of means for testing the several index point positions of a column of a record card, card advancing means for presenting and removing a card column to said station, manually operable means for causing said advancing means to skip a column and means controlled by said testing means for preventing the operation of skipping a column upon the presence of any perforation in the column to be skipped.

8. In a machine of the class described, the combination of a carriage for perforated cards, means to effect a step-by-stepescapement of the carriage, a series of keys, means common to all of said keys to initiate an escapement of the carriage, a series of levers one for each key adapted to be rocked to operate the initiating means, a common pivot for said levers, and means controlled by the card to cause a displacement of the common pivot upon depression of a key to render all of said levers ineffective to operate the initiating means.

9. In a machine of the class described, the combination of a carriage for perforated cards, an escapement device to effect a step-by-step escapement of the carriage, a series of keys, individual levers associated with the keys, said levers being, pivoted on a common support, a pivoted bar common to all of the levers and adapted to be operated by any one of said levers upon depression of a key to initiate an escapement of the carriage, and means to cause a displacement of the common pivotal support for the levers upon noncoincidence of the depressed key and the perforate index point to render all of the levers ineffec- 10 tive to operate the common bar.

BERNHARD KARL FRITZ EWALD.

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