US2332819A - Recording apparatus - Google Patents

Description

Oct.- 26, 1943.

E. S. SVENSSON RECORDING APPARATUS Filed March 4, ,1959

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3 Sheets-Sheet l ATTORNEY Oct. 26, 1943. E. s. svx-:NssoN 2,332,819

RECORDING APPARATUS Filed March 4, 1939 3 Sheets-Sheet 2 A TTORNE Y OCt 26, 1943 E.. s. svx-:NssoN 2,332,819

RECORDING APPARATUS Filed March 4, 1959 5 Sheets-Sheet 5 A TTORNEY Patented Oct. 26, 1943 RECORDING APPARATUS Ernst S. Svensson, New York, N. Y., assignor to The Kron Company, Bridgeport, Conn., a corporation of Connecticut Application March 4, 1939, Serial No. 259,787

17 Claims. (Cl. 23A-5.4)

This invention relates to recording apparatus and particularly to power drivenmechanisms of rugged nature suited to severe conditions of service such as the recording of weights measured by heavyk industrial scales. This application is a continuation in part of my co-pendingapplication Serial No. 83,870, filed June 6, 1936, which has eventuated in Patent No. 2,198,139.

An important object of the improvements is to construct a recording apparatus for the stated purpose whose operating parts are strong and perform substantial extents of movement thereby to eliminate requirements for extreme accuracy and ine dimensioning of the parts.

A related object is to support and constrain the operating parts at well spaced points to render them individually accessible and to augment the amount of movement cooperatively performed by the parts at their points of operative engagement.

A further object is to separate a portion of the apparatus consisting of those mechanisms which operate the printing type from that portion of the apparatus which comprises the more rugged and heavier power mechanism, and to provide, for transmitting power from the latter mechanism to the former mechanism, a single movable part which by convenient detachment from either mechanism will permit that mechanism to be removed from the apparatus as a unit and replaced by a similar or diiferent unitwith ease and dispatch when the apparatus requires servicing in the field.

` A related object is to aiord a separation of the above mentioned two sets of mechanism which will enable them to be separately housed if desired whereby the printing mechanism may be protected from dirt. and lubricants which are commonly present in power mechanisms.v

A further object is to provide a cycle stop power mechanism which will automatically terminate a manually'initiated cycle of recording movement vand torprovide a manual controller for initiating thei cycle of movement which does not require the operator to wait or attend the controller after it is once manipulated to initiate the recording operation.

- `A further object is to provide in a power mechanism for recording apparatus suitable safeguards yieldingly to check the coasting movement of the power" mechanism after the source of power has been automatically disconnected therefrom and before some predetermined position of the power driven parts has been reached at the end of each recording operation.

A further object is to govern the motivation of the entire apparatus from a single power operated shaft and Va plurality of cams rotated in unison thereby.

In the drawings:

Fig. 1 is a front view of the entire recording mechanism.

Fig. 2 is a side elevation looking from the left at Fig. 1 and further shows the portions of stepped members which may be employed to determine the value registering positions of the type segments, Fig. 2 being drawn on a smaller scale than Fig. 1.

Fig. 3 is an enlarged fragmentary view taken in section on the plane 3-3 in Fig. 2 looking in the direction of the arrows.

Fig. 4 is a correspondingly enlarged fragmentary View taken in section on the plane 4 4 in Fig. 5 looking in the direction of the arrows.

Fig. 5 is a plan view of the upper portion of the mechanism in Fig. l and is drawn on a corresponding scale.

The recording mechanism as a whole may be viewed as comprised of two main systems ofparts which may respectively be termed the type registering mechanism, and the power and printing hammer mechanism.

Type registering mechanism This mechanism isbest shown in Figs. 1, 2, 4, and 5. One or more horizontal feeler rods I0 are mounted for Llongitudinal sliding movement in apertures through the main vertical frame plate II and in .respectively aligned rectangular apertures through the offset bracket I2 shown mounted on the exterior surface of frame plate II in Figs. 2 and 5. Feeler rods I0 are equipped with any suitably thin edged feeler terminals I3 which are constantly urged toward steps on peripherally notched wheels I4, I 5, etc., by individual light springs I6, each of which springs surrounds a rod I0 and is compressed between a collar I'I carried thereby and the frame plate II. The stepped wheels I4 andY I5 are representative of any adjustably positionable stops which may be located respectively vin the paths of the different feeler terminals I3. For an example of one pos sible purpose and function of such stepped Wheels reference 'may be had to the co-pending application ofrGlenn E. Weist, Serial No. 753,842, now Patent No. 2,173,746 wherein similar discs are designed to be rotatively positioned in accordance with the weights of a load and by the automatic action ofV a weighing scale in order that the weights measured thereby may be recorded.

which is shown in Fig. 2 to be mounted at its rear' end upon the main vertical frame plate and removably held thereon by bolts 32.

The upper end of each type segment I9 is pivotally connected to a clevis 22 from which a connector 23 extends rearwardly and terminates in a similar clevis 24 pivotally connected to the forward end of a corresponding feeler rod IU.

The effective length of any connector 23 may be adjusted finely by a threaded coupling 25 interposedbetween separate rod parts ofthe connector and having threaded engagement therewith and lockable in adjusted position by the end nuts 26 which also have threaded engagement with the rod parts.

In Figs. 1 and 5 the type segments |9 are seen to be axially spaced by suitable collars .21 which Surround the support shaft 20 and it will be plain that a considerably greater number of type segments than the four shown, together with additional manually settable type segments carrying any desired data, can be accommodated within the space between the sides of the frame casting 2|.

The normal, or non-printing position of the type segments is as pictured in full lines in Figs. 1, 2 and 5 and this position is brought about through the action upon all of the rods l of an actuating bail comprised of the transversely disdepending projections 3| respectively carried by the rods I0 (see Fig. 4). Thus the bail rod 28 may act to force all of the rods IIJ simultaneously toward the front against the opposition of their compression springs I6 orby movement toward the rear may release allof rods I0 to the individual action of such springs as individually and respectively limited by the notched wheels |4, .|5, etc.

The inking ribbon is designated as 54 in Figs. 1, 2 and 5 of the drawings. Between theribbon spools 60 and 85, the ribbon extends around a left guide pulley 92 and a right guide pulleyy 93, each of vwhich pulleys is rotatively mountedv by'a construction more fully disclosed in my aforesaid co-pendingapplication. The shoulder stud 94 retains and gives bearing to the guide pulley and penetrates the extremity of a horn-like projection 95 of the frame casting. The rearwardly projecting end of stud 94 serves to mount a pressorl bracket 96 which is rigidly retained thereon by the fastening nut 91. The pressor bracket 96 is mostl clearly shown to afford sliding support for the stem 98 of a pressor disc 99 which is constantly urged inwardly by the compression spring |00 so that pressor disc 99 yieldingly bears upon the inking ribbon 54 while the latter is in contact with its guide pulley 92 or 93.

Power and printing hammerv mechanism This mechanism is located completely below the floor plate |02 which at its rear end is supported upon the bracket |50 and at its forward end is supported upon vthe upstanding portions of the lower frame .casting which in effect form spaced standards. Most of the power and printing hammer mechanism is supported between the two sides of frame casting |5| which itself derives supportV from the main frame plate to which it is secured at the rear end in removable manner by bolts as.

Any suitable electric motor |52 may be separately mounted upon the main frame plate and the motor shown has its shaft equipped with a drive Worm |53. The worm wheel |54 is in mesh with worm |53 and rotates the shaft |55 to which it is fixed. Shaft |55 has bearing at each of its ends in the frame casting |5| and also carries fixed thereto the pinion |56. Pinion |56 is in mesh with'v the large gear |51 which is xedly carried by the cam shaft |58.l Cam shaft |58 also spans and has bearings in the two sides of frame casting |5| and iixedly carries between the frame sides a cam |59 for controlling the printing hammer. Outside the left bearing in the frame casting shaft |58 carries acam |68 for controlling the bail arm 29 and thereby the type registering and ribbon feed mechanisms, At its left extremity in Fig. 1 cam shaft 58 also rotates an electric switch operating cam |8| thereby to automatically interrupt the circuit to the electric motor |52 when a cycle of recording action has been completed.

The printing hammer comprises a strip of suitable platen material |62 securely mounted on the top surface of a hammer block |63 which at both ends is guided for vertical sliding movement in the frame casting |5|by means of grooves or Ways sunk in the latter. Block |63 carries the horizontal rod |64 which pivotally supports two depending links |65 and |66. The lower ends of these links are pivotally engaged by a similar horizontal 'rod |61 which is swingingly supported by and connects the free ends of two forwardly projecting arms |68 and |69 which arms are flxedly mounted upon shaft |16 in spaced relation. The ends of shaft have bearings in the frame casting |5. At a central portion, shaft |10 xedly carries the hub |1| of the cam follower arm |12 whose rearwardly extending end is equipped with a roller |13 riding in contact ywith the periphery of cam |59. At the right sideof the frame casting, shaft |10 fixedly carries the stub arm |14 with which is connected the hammer actuating spring whose rear end is anchored to a bracket |16 mounted on the main frame plate l. K y

The outer left surface of the frame casting llt is equipped with two bearing'lugs |11 and |18 which guide a longitudinally sliding pluner device. consisting of a rod |19 rigidly carrying` the clevis |88 at its rear end and thereby pivotally connected to the lower extremity of the ball arm 29. vBoth this bail arm and the corresponding bail arm at the right side of the frame casting are rigidly mounted on the opposite extremities respectively of a pivot shaft |`8| which extends through and has bearings in both sides of the frame casting. v

The rod .|19 of the plunger device may have il'. sufllcientlyloose fit in the bearing lug |11 to permit the pivot pin |82 in cl'ev'ls |86 to follow the arc of swing of the lower extremity of bail Hedge of its bifurcation with the top edge of bar Varm 29 but rod |19 is madeirigld with a sliding bar |83 at its forward-endwhich is preferably of rectangular cross section and a good sliding flt Within a corresponding aperture through the bearing lug |18. A roller |84 is pivotally carried at theiorked extremity of bar |83 and is con- -stantly pressed against vthe periphery of cam |80 by the compression spring |85 loosely surrounding Vrod |19 and bearing against the lug |11 at its rear end while its forward `end bears againsta thrust Washer |88, fast to bar |83;

f |81 represents a current supply wire running directly to the windings of the electric motor |52. lnects one switch contact |89 to the source of Another supply wire I 88 electrically concurrent supply. The other switch contact |90 isccnnected tothe motor by a wire I9I so that making and breaking electrical contact between -parts |89 and |90 will respectively start and stop in its movement toward the'front by the engagement with saidl bracket of a cross pin |95. The forward Aend of bar |93 is slidingly sup- `ported in a downwardly and laterallyextending portion of the frame casting |I and is equipped with amanual operating handle |96. A dog |91 is pivoted at |98 to the bar |93 and straddles this bar in a bifurcated lower portion |99 as shown in Fig. 3 and projects upwardly for engagement by the cam IBI.

Dog |91 is constantly urged counter clock- 'wise in Fig. 2 by springs 200 and 20|, being normally disposed in upstanding position as shown in Fig. 2 by the engagement vof the rear |93 whereas the higher disposition of its front bifurcated edge permits at times relative swinging of the top of-dog |91 toward the right in Fig. '2 by overpowering of the tension in springs 200 and 20|.

This tension, however, is suiiiciently strong to -enable counter clockwise rotation of cam I6I in Fig. 2 to pick up and impel the' bar |93 to its position shown in Fig. 2 by engagement with dog |91 for the purpose of opening the switch.

Operation of type registering and printing mechanism f lThe power operated type registering and print'- ing mechanism is shown in Figs. 1 and 2 as its parts are positioned when the electric motor |52 has been out out rof circuit automatically at the end ofa cycle of recording action. During a single cycle of such action, the cam shaft |58 performs a half turn .counterclockwise in Fig.

2. The cycle is initiated by manually pushing the switch knob |96 as far as it will go toward the left in Fig, 2.` In this movement the dog |91 will tip toward the right as permitted by the The switch plug |92 then completes the causing motor |52 to start running thus rotating 'worm |53, worm wheel |54, shaft |55, pinion |56, gear |51, and thereby the cam shaft |58 'togetherwith the three cams |59, |60 and. |6| ;A

`fixed thereto,` Iin Fig. 2.

jfollower arm in a counterclockwise direction A very small amount of rotation of cam |60 will permit roller |84 which rides in contact therewith, to move suddenly toward the right under the power of the spring and the consequent pulling of the lower end of bail arm 29 toward the right about its pivot I8I will throw the upper portions of bail arms 29 and 30 toward the left in unison together with their carried bail rod 28. By thus moving away from the projections 3| on all of the feeler rods I0 simultaneouslyl each of these rods is released or delivered to the thrust of its. individual spring I6 which will carry each feeler terminal I3 toward the left in Fig. 2 until it is intercepted or blocked in its movement.

While many devices are known in the art of registering mechanisms for blocking the spring urged advance movement of type positioning feeler elements for conditioning the type to print some recordable Value, any of which devices may be used for that purpose with my improved recording mechanism, there is lherein illustrated for that purpose the differently notched periph- 'eries of respectively separate wheels such as I4 and I5 of which there may be one for each diierent feeler terminal I3 and which may be rotatively positioned by the automatic action of a weighing scale (not shown), or otherwise.

As each of rods I0 moves toward the left in Fig. 2 a distance determined by the notched wheels I4 .and |5, it will, through its connection to a corresponding type segment I9, swing that segment counterclockwise in Figs. 2 and 9 a corresponding degree of travel about the pivot shaft 20 so that the proper one of type characters I8 will be positioned in printing position vertically beneath the segment pivot. Fig. 2 represents one or the type segments I9 by broken lines as having been swung to a suitable printing position. y i

When the proper positioning of 'all type segments I9 has been thus accomplished, cam |59 will have rotated far enough in Fig. 2 to discharge the roller |13 from its highest peripheral point into the segmental' notch in cam |59 whereupon under the power in spring |15, the

|12 will abruptly swing downwardly in Fig. 2 causing counterclockwise rotation of shaft |10 and by means of arms |68 and |69 causing the connecting rod pivots |61 to be abruptly elevated. By this action the hammer block |63 is caused to deliver a smart blow upwardly through the action of the connecting links |65 and |68 so that the platen |82 momentarily presses upwardly against the type characters which are in its path on all of the segments I9, a, rectangular aperture |03 in the floor plate |02 accommodating this action.

Thus by means of. the inked ribbon 54 which is stretched laterally slightly above the floor plate |02 in alignment with the platen |62, a record will be `printed from all of the type segments which have been moved to printing position, upon any piece of paper or cardboard which may be interposed between the ribbon and the topv surface of the floor plate |02.

The cam shaft |58 continues to travel after the record has been struck and in so doing proceeds to restore both the bail arm 29 and hammer block |63 to their starting positions shown in Fig. 2 whereby all of the type segments |9 and feeler rods I0 are correspondingly restored.

[When the follower rollers |13 and |84 have thus arrived at the diametrically opposite high points on the peripheries of their respective cams, the top end of cam |6| will have rotated to a position before completing its half turn in which it will engage and force to the right the top end of dog |91 in Fig. 2. Springs 200 and 20| are sufliciently strong to pull the switch block |92 out from between contacts- |99 and |90 without permitting the dog" |91 to swing upon its pivot |98 so that all of the parts become restored to their positions inrlg. 2 except that the three cams |59, |90, and IBI are diametrically reversed. vThese cams, however, are symmetrical with respect to any diameter through their axis so that a subsequently repeated half turn of cam shaft |58 will precisely repeat the cycleof recording operation which has been described. After current has been cut of! from .motor |52, there may be slight variation in ,the .amount of overrun of the parts which are rotated therebyI due to inertia, but a check on this inertia effect will be exerted by dog |91 after bal' |93 has been positively stopped by thevpin engaging bracket |94 owing to the tension in spring 200.

For additional assurance against too much overrun travel of cam shaft |58 after the motor is (ie-energized, the bump H9 may be formed on the periphery of cam |59, which, upon engaging with roller |13 will augment the yielding resistance to continued rotation of the cam shaft |58 before the cam |60 shall have coasted far enough counter-clockwise to Arecede from the path of roller |84. If springs 200 and are made sufficiently weak they will stretch before overcoming the frictional cling of contacts |89 and |90 upon the switch block |92 but will iinally overcome this clingand thereby produce a snap action of block |92 to the right to cause a quick breaking of the circuit as is desirable when it is important to minimize arcing.

For brevity inthe appended claims, the two bail arms 29 and 30 and their connecting structure aretermed an impeller or movement transmitter it being clear'that all power for motivating the parts of the type registering and ribbon feeding mechanism is transmitted therethrough and requires only toV be disconnected from the parts 28 and 40 to operatively Vdis-associate the lower power mechanism from the upper type positioning mechanism. In fact, only disengagement of rackbars 90 and. Il from their guide pins 44 and l0 is necessary to permit removal and replacement of the type registering mechanism as a unit without disconnecting the bail 29, 30 from any of its associated parts.

The advantages of these improvements may be obtained by the use vof parts differing widely from the exact shape and arrangements herein disclosed to illustrate the invention, and the following claims will be understood to include by their terms all fair equivalents for the particular parts land constructions to which they refer.

I claim: l Y l. In recording apparatus includingrecording characters, the combination of, a source of power,

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assumo excursions is repeated including a power disconnecting member, 'and connections operably relatins' said member to the second of said cams .in a manner to cause said member to disconnect the source of power from said shaft at least twice during said single revolution of the latter.

2. In recording apparatus the combination dofined in claim l in which each of the said cams is symmetrically shaped with respectV to-any diametricol line passing through its axis of rotation and in which the said .cams are held in constant rotative relation such that a half turn of both cams; compltes the said excursion of the said record making device and also operates the said .power disconnecting member to deprive the said shaft of power.

3g In recording apparatus an electrically powered recording mechanism including a cam having a working face contour which repeats itself around the periphery of the cam adapted to be intermittently rotated substantially less than a full turn by alternate application and cut of! of power, a record striking device constructed and arranged to be motivated by less than a half revolution of said cam in a manner to complete a cycle of recording action during said half revolution, a second cam, a source of power adapted manually to be energized independently of the movement of said second cam, and connections operated by said second cam in a manner automatioally to deenergize said source of power a plurality of times during one complete turn of said second cam.

1.A In recording apparatus, electrically powered mechanism as defined in claim 3 together with a spring biased stop member disposed in the path of `travel of the said cam in a manner yieldlngiy to oppose coasting thereof after its said deceleration begins.

5.*In sectionally constructed recording apparatus, the combination of. `frame work including a standard carrying a vertically elongated guideway and determining the location of a printing station at the top thereof, a power mechanism comprising a section of said apparatus extending rearward from the bottom of said standard, an impression striker guided by said standard to per'- form vertical movement toward and away from Asaid printing station, a type positioning mechanism superimposed above and extending rearward from the tcp of said standard and presenting type at said printing station for cooperation with said striker thereat to print a record, and means to transmit movement from said power mechanism to said type positioning mechanism including a lever paralleling and longer than said standard swingably mounted on said framework near the rear of said mechanisms and constructed and arranged operatively to connect said mechanisms.

6. In a sectionally constructed recording apparatus, the combination defined in claim 5, in which the said frame work is' sectional, and comprises a vertically elongated holding structure, a. horizontally elongated lower frame bracket detachably mounted on said holding structure and carrying the said power mechanism, and a horizontally elongated upper frame bracket detachably mounted on said holding structure and carrying the said type positioning mechanism, the saidr transmitting lever being detachably related to eac-h of said mechanisms whereby either oi' vasi-id mechanisms may be' removed from the recording apparatus as a unit without disturbing the other of said mechanisms.

i 7. In a sectionally constructed recording appafratus as defined in claim 5, the combination deflned Vin said claim in which the said type positioning mechanism includes pivotally mounted typeLcarrying segments, together with a series of separate springs connected to bias the said type carrying segments respectively away from nonprinting position, and an impelling element motivated by.l the saidmeans to transmit movement in a. manner to overcome the bias of said springs and thereby force said segments into non-printing position. 8. In sectionally constructed recording apparatus, the .combination defined in claim in which the said impression striker includes a horizontally elongated platen block, together with vertically extending guideways stationed on the said standard beneath the said printing station and slidably engaged by the ends of said platen block in a manner to guide the latter in a vertical path of movement, and devices operatively connecting the said power mechanism to said platen block.

9. In recording apparatus, the combination of, an apparatus support frame, a type carrying segment pivot-ally mounted on said frame for swinging movement, a rectilinear guideway on said frame, a stop sensing feeler element constrained by said guideway to slide in a straight path of lengthwise travel, a floating rod-like coupling pivotally connected at one end to said feeler and at the 'opposite end to said segment, a spring operating between said frame and said feeler element in a manner to urge the latter in a direction away from said segment, and means to impel said feeler element in a direction toward said segment against the bias of said spring.

10. In recording apparatus, an electro mechanical system adapted both to complete and to terminate a manually initiated cycle of recording action effected by substantially less than a full turn of a motivating cam, including in combination with a plural lobed motivating cam, recording mechanism, a follower engaging said cam connected to repeatedly actuate a portion of said recording mechanism during a single full revolution of said cam, a manually shiftable electric switch control member, an electric motor electrically connected to be energized and de-energized by movements of said member in respectively reverse directions, and means rotated in unison with said cam constructed and arranged to shift said member in a direction to repeatedly deenergize said motor during a single revolution of said cam and means.

1l. In recording apparatus, the combination defined in claim 9 in which said floating coupling includes means constructed and arranged to vary the length of said device land simultaneously to maintain the rigidity thereof.

12. In recording apparatus in combination with printing mechanism, a power driven cam, a follower for said cam connected to operate said printing mechanism, means to deprive said cam of driving power, and a spring biasing said follower in relation to said cam in a manner to oppose movement of the former by the latter, said cam having a portion of its follower contacting surface shaped and arranged to move said follower an extraordinary distance against the bias of said spring thereby to increase the force with which said spring opposes coasting travel of said cam after the latter is deprived of its driving power.

13. In recording apparatus the combination defined in claim 17, in which the said motor control means includes electrical switch contacts for vstopping and starting said motor, a contact operating member mounted and arranged to be movable free from bias between motor starting and motor stopping position, a spring biased latch dog carried by said member, the said second one of said cams being connected to be rotated by said motor and shaped and positioned to engage said dog in a manner to impel said contact operating member in a direction opposite to that in which said dog is biased.

14. In recording apparatus the combination with shiftable recording characters of, an electric motor, a device constructed and arranged to perform an excursion for making a record from said characters, a shaft rotatable by said motor, means to transmit motion from said shaft to said characters, plural actuating cams rotated in unison by said shaft, connections actuated by one of said cams for causing said excursion of the record making device, electrical motor control means including a member operably related to-a second one of said cams constructed and arranged when moved thereby to de-energize said motor before said excursion is repeated, together with a handle device constructed and arranged to move said member reversely and independently of the last said cam thereby to re-energize said motor, the said motor control means including an electric switch for energizing and de-energizing said motor, a switch actuating bar supported for lengthwise movement, a dog pivoted to said bar, a spring biasing said dog to a definite position relative to said bar so that said dog projects therefrom into the path of movement of said second one of said cams, and a handle carried by said bar, the said dog being constructed and arranged to yield against the resistance of said spring in va manner to permit manual shifting of said bar in a direction to actuate said switch independently of the position of said cam.

l5. In recording apparatus the combination with shiftable recording characters of, an electric motor, a device constructed and arranged to perform an excursion for making a record from said characters, a shaft rotatable by said motor, means to transmit motion from said shaft to said characters, plural actuating cams rotated in unison by said shaft, connections actuated by one of said cams for causingsaid excursion of the record making device, electrical motor control means including a member operably related to a second one of said cams constructed and arranged when moved thereby to de-energize said motor before said excursion is repeated, together with a handle device constructed and arranged to move said member reversely and independently of the last said cam thereby to i'e-energize said motor, the said motor control means including, electrical switch contacts for stopping and starting said motor, a contact operating member mounted and arranged to be movable free from bias between motor starting and motor stopping position, a spring biased bifurcated element pivotally connected to said contact operating member in its bifurcated portion and further shaped and arranged to straddle said member in a manner to abut thereagainst at the crotch of said bifurcated portion thereby to limit the extent of swinging movement of said element relative to said member, said second one of said cams being connected to be rotated by said motor and shaped and positioned to engage said element in a manner to impel said contact operating member in a direction opposite to that in which said element is biased.

A i6. In recording apparatus the combination, with; striftable recording characters, of an. electric motor, adevice. constructed and. arranged to perform an excursion. for making; a; record from said characters, a shaft rotatable by said motor, plur'al actuating cams rotated in unison by said shaft, means to transmit motion from said shaft to said characters including one of said cams, connections actuated. by oneof' said cams for causing said excursion of the record making, device, electrical motor control means including a switch operating member operably related to one of said. cams constructed and arranged to be moved thereby in a switch-opening direction to de-energizesaid motor before said excursion is repeated, together with devices constructed and arranged to move said membery in a direction dif,- ferent from said switch-opening direction to enable said member to escape said cam and thereby free said. member for switch closing movement to re-energize said motor.

17. In recording apparatus the combination with shiftable recording characters of an electric motor, a device constructed and arranged to perform an excursion for making a record from said characters, a shaft rotatable by said. motor, means to transmit motion from said shaft to said characters, plural actuating cams rotated in unison by said` shalt, connections actuated by one of said cams' for causing said excursion of: the rec,- ord making device, electrical motor control mem including a member operably related to a secomi one of said cams constructed and arranged, when moved one direction thereby to dev-energize said motor before said excursion is repeated, together with a. handle device constructed and arranged to movesad member'in a reverse direction and independently of the last said cam. thereby to 11e-energize said motor. y

ERNST S. SVENSSON.

CERTIFICATE CE CORRECTION. Patent No. 2,552,519. october 26, 19M.

ERNST s. svENssoN.

It is hereby certified that error appears in th-e printed spe oificaton of the above numbered patent requiring; correoti on as follows Page L, second co lumn, line 57, cl aim Ji, before the word "said" insert --irst; and that the said Letters Patent should be read with this correction therein that the ,same may conform to the record of the case in the Patent Office.

Signed and sealed this 2l st day of December, A. D. 3.9i@

Henry Van Arsdale, (Seal) Acting Commissioner of Patents.

CERTIFICATE 0R CORRECTION. Patent No. 2,552,819. october 26, 19M.

ERNST s. svENssoN.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring, correction as follows: Page li, second column, line 57, Claim L1., before the word "said" insert --first; and

that the said Letters Patent should be read with this Correction therein that the `same may conform to the recordrof the case in the Patent Office.

Signed and sealed this 21st day of December, A. D. l9li5.

Henry Van Arsdale,

(Seal) Acting; Commissioner of Patents.

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