US1920375A - Cash register - Google Patents

Description

Aug. 1, 1933. c. w. GREEN 1,920,375

CASH REGISTER Original Filed April 13-, 1927 5 Sheets-Sheet 1 lllulmlmlr.

altotnurv 1933- c. w. GREEN 1,920,375

CASH REGISTER Original Filed April 13, 1927 5 Sheets-Sheet 2 Charles (0. Green,

Aug. l, 1933.' c. w. GREEN 1,920,375

CASH REGISTER Original Filed April 13, 1927 5 Sheets-Sheet 3 Z5 Charles (1/. Greezb Aug. 1, 1933. c. w. GREEN 1,920,375

CASH REGISTER Original Filed April 13, 1927 5 Shets-Sheet 4 lnue'ntor Char/ea 11/. Green,

1933- c. w. GREEN 1,920,375

CASH REGISTER Original Filed April 13, 1927 5 Sheets-Sheet 5 IN VEN TOR.

(Zak/9.)" Kl. Gfeel MVAT ORA/5.

Patented Aug. 1, 1933 UNITED STATES PATENT OFFICE assignments, to the National Cash Register Company, Dayton, Ohio, a Corporation of Maryland Original application April 13, 1927, Serial No. 183,392. Divided and this application May 17,

1930. Serial No. 453,163-

9 Claims. (Cl. 235-130) This invention relates to shutter and resetting mechanisms and the embodiment selected for the purpose of illustration is particularly adapted for use in cash registers, although it is susceptible of ready adaptation for use in other types of accounting machines and analogous devices.

This application is a division of the application of Charles W. Green, Serial No. 183,392, filed April 13, 1927, to which application reference may be had for a complete disclosure of the mechanisms not shown herein.

An object of the present invention is to provide a totalizer unit which is normally concealed from view so that reading and resetting of the same is normally prevented.

Another object is to provide a control lever which when moved to a certain position of adjustment will cause the totalizer to be exposed to view and further permit the insertion of a key for the purpose of resetting the totalizer wheels to zero.

Another object is to provide a-resetting mechanism which is adapted to reset the totalizer by rotating the totalizer elements in the same direction as they are rotated for item accumulation.

Another object of the present invention is to provide means for restoring the tripped transfer pawls to ineffective position after resetting of the totalizer elements has been effected.

A more specific object of the present invention is to provide a shutter which normally conceals the totalizer, and a plate mounted adjacent the side of the cabinet which normally covers an opening for the resetting key; these elements being adapted to be moved to inoperative position by a control lever to respectively expose the totalizer and permit resetting thereof.

Another object of the invention is to provide a totalizer resetting mechanism well adapted by simplicity of construction and easy operation to facilitate resetting operations when desired.

Other and further objects of the invention will become apparent as the description of the invention progresses.

Reference will now be had to the drawings, in which,

'Fig. 1 is a perspective view of the machine to which the present invention is applied, showing particularly the arrangement of the operating keys. This view also shows the adjustable lever for exercising control over the machine, as well as the opening through which the totals may be read.

Fig. 2 is a sectional view of the machine, taken substantially through its mid-portion. This view and is designated as the No sale key 31.

shows particularly the differential and totalizing devices and the means whereby they may be brought into and out of cooperative relationship.

Fig. 3 is a view in side elevation showing the control lever in one of its positions of adjustment. This view also shows a portion of the resetting devices.

Fig. 4 is a top plan view of a number of the elements associated with the controlling devices for the machine.

Fig. 5 is a top plan view of the machine, the cabinet being cut away to show the arrangement of the mechanisms located within. This view shows substantially all of the devices utilized for registering and indicating operations as controlled by the various operating keys.

Fig. 6 is a view in side elevation of a portion of the mechanisms utilized to prevent or allow resetting operations. This view also shows the lock for locking the control lever in its adjusted position.

Fig. '7 is a cross sectional view of the totalizer showing the transfer mechanism.

Fig. 8 is a detail. of the lowest order transfer operating cam.

Fig. 9 is a view in side elevation showing the position that the parts assume when a transfer is to be effected.

Fig. 10 is a detail of certan parts which serve to restore the transfer pawls during resetting.

Fig. 11 is a view of the key utilized to perform resetting operations.

The illustrative machine is provided with keys 32 divided into groups, one group for registering amounts from 1 to 9, another group for registering amounts ranging from 10 to 90, and a third group for registering values of $1.00 to $9.00. Obviously more amount keys can be provided if desired. A special key is also provided The amount keys 32 and the No sale key 31 .are pivoted upon a shaft 33 supported by the side plates 20 and 21. The amount keys 32 and the No sale key 31 which carry at the front portions of the levers suitable key caps bearing indicia designating the nature of the keys play in slots 28 formed in the cabinet. At their rear ends the keys are guided by slots 35 formed in a plate 36 secured to a cross bar 25 by any suitable means, such for example as screws 27. All of the keys are provided with notches 38 adapted to receive the rearward end of the key coupler 39 which extends between the side plates 20 and 21 and which rests upon the rear end of the keys. The coupler is pivotally supported by means of plates and 41 attached to the key coupler and which are suitably apertured to receive a shaft 42 which is located in substantially the mid-portion of the machine. Shaft 42 is supported by side plates 20 and 21 in a manner similar to the shaft 33. It will be obvious that when the forward ends of the operating keys are depressed the key coupler 39 will be rocked clockwise so that its rearward end will enter the notches 38 of the depressed keys. The purpose of such key coupler mechanism is well known in the art, and need not be discussed herein.

It is essential that some device be provided to insure a complete performance of the started registration before a second operation can subsequently be effected. As this mechanism forms no part of the present invention, it is unnecessary to describe this mechanism specifically. For a full disclosure thereof reference may be had to the parent application.

The rear ends of the keys are formed with upstanding projections 46, the forward edges of which are substantially concentric with respect to the key coupler supporting shaft 42. When the key coupler is being operated the rearward end thereof. will pass in front of the concentric portion of the unoperated keys, thereby locking them against. movement. Since this mechanism is well known in the, art it need not be discussed herein in further detail.

Differential mechanism The differential mechanisms or devices controlled by the various groups of keys for entering the desired amounts in the totalizers are all similar in construction and principle of operation, and a description of one will suffice for all. The differential device associated with the dollars bank of keys is shown in Fig. 2 wherein it will be noted that mounted upon the shaft 42 is a frame comprising parallel side plates 47 integrally joined by cross bar or bail 48 which normally stands over the projections 46 of the keys of the dollars bank. The frame just described is attached to the shaft 42 by a pin 49 shown in Fig. 5. Also attached to the shaft 42 at substantially its mid portion is a segmental rack 50 adapted to operate the dollars element of the totalizer devices, to be described hereinafter in detail. As will be noted from Fig. 3 the rearward portions of the upstanding projections 46 of the keys of a group are suitably cut away so as to form steps 51 which are at different distances from the cross bar 48. Graduations are directly in the path of cross bar 48, the consequence being that when the keys are depressed a lost motion is effected between the keys and the frame but at a certain time the step 51 of the depressed key will coact with the frame to operate it and in this manner a differential movement is given to the frame depending upon the key depressed. All of the keys of the dollars bank have the same extent of movement and since in this manner the rack 50 will be operated differentially the associated totalizer element will be operated correspondingly.

The differential frame associated with the cents bank of keys is shown in Fig. 5 and denoted by reference character 52, this frame being loosely mounted upon shaft 42 and one of the side plates of the frame has attached thereto a cents operated rack 53. The nine keys associated with the cent bank are provided with differential graduations similar to those described in connection with the dollars bank of keys. Frame member 54 associated with the dimes bank of keys is also shown in Fig. 5 and is loosely mounted upon the joined together by a cross-rod 57 to provide an I additional control whereby overthrow of the frame is prevented. It will be seen in Fig. 2 that directly over the key supporting shaft 33 the keys are provided with upstanding portions 58 the upper edges of which are at different heights so as to provide differential steps which are complementary with respect to the steps 51. From this construction it follows that as the key is depressed a projection 51 will operate with the cross-bar 48 rocking the frame differentially until the rod 57 engages the upstanding portion 58 of the depressed key, at which time the frame will be positively locked inasmuch as the graduations of the keys cooperate with opposite sides of the differential frame. This locking action takes place at substantially the termination of the down stroke of the keys at which time the differentially operated racks will thus also be held in their adjusted positions. It will also be noted that the forward edges of the upstanding projections 58 are concentric with respect to the shaft 42 so that cross-rod 57 coacts with the step of the operated key. There will be no interference between the cross-rod 57 and the upstanding portions 58 of the nonoperated keys of the bank. A similar overthrow preventing means is provided for each bank of keys so that upon depression of the keys of the different banks the frames and associated racks will not be carried beyond the positions which they are intended to assume.

A suitable totalizer engaging mechanism is also provided, but inasmuch as this mechanism forms no part of the present invention a detailed description thereof is unnecessary. It may be said,

however, that the totalizer is thrown into engagement with the differential racks at substantially the beginning of the downward movement of the keys and is disengaged from said racks at substantially the beginning of the return stroke of the keys. For a detailed description of this mechanism reference may be had to the parent application.

Transfer mechanism The transfer mechanism employed for the totalizer wheels above the units order is of the type of which the several orders are independently and successively actuated and it is operated upon the return stroke of the keys at which time the totalizer pinions are out of mesh with their respective actuators.

Each totalizer wheel carries a pin 115 whichis in the plane of an extension 116 of a spring urged transfer trip pawl 117 provided with a stepped shoulder 118. The transfer pawls 120 are urged counter clockwise by coil springs 128 so that normally a lug 121 formed thereon rests upon the shoulder 118. Each transfer pawl is pivotally mounted on a related arm 122, all of which are journalled on a shaft 123 carried by a pair of ears formed on a supporting bar 124 securely fixed between the side frames 71 and 72 of the totalizer. When a totalizer wheel of a higher order makes a complete revolution a pin 115 will urge a trans: fer trip pawl forwardly thereby disengaging the lug 121 from shoulder 118 permitting the spring 128 to throw the pawl downwardly until the bottom edge of transfer pawl rests upon supporting bar 124. At this time the engaging end of a transfer pawl will be brought into operative engagement with a tooth of a ratchet wheel 125 attached to the pinion of the next higher order wheel so that when the transfer pawl is moved rearwardly cooperation of the pawl with the ratchet wheel will advance this wheel to effect the necessary transfer. In so doing the transfer pawl will also be raised due to the camming action of the next ratchet tooth so that lug 121 will again rest on the shoulder 118. When a pawl 117 is tripped or forced forward by a transfer pin 115, as above described, the transfer pawl 120 will be released and will be drawn downwardly by the coil spring 128, but if they should move downwardly too slowly or by any means become stuck in their elevated position they are positively forced downwardly by pins 1171, carried by the trip pawls and adapted to engage the upper edge of the transfer pawls. The tail of the pawl 120 is bent to form a lug 119 which is adapted to cooperate with the short edge of the arm 122 and is provided for the purpose of preventing said pawl from being out of engagement with the ratchet teeth at the end of the extreme rearward travel of said pawl with the result that overthrow due to a too rapid transfer operation is prevented.

The upper edge of the transfer pawl 120 is preferably notched at 1200 so that at the extreme end of the transfer operation the pin 1171 will overlie the notch 1200, the upper end of the pawl 117 having followed the pawl 120 rearward in the operation of the latter. This permits lug 119 to function as an overthrow preventer alone, but if so desired the notch 1 200 and lug 119 may be dispensed with so that pin 1171 coacting with the upper straight edge of pawl 120 will prevent overthrow.

The means whereby the'transfer pawls are successively actuated so as to efiect the necessary transfers, comprises a series of links 126 each connected to a related arm 122 and slotted so as to engage and rest upon the oscillating transfer shaft 97. Upon the shaft 97 are secured a plurality of transfer cams 127 which are spirally arranged so as to actuate the links of the different denominational orders seriatim. Each cam 127 is in the plane of a pin 129 carried by its associated link 126. During the downward stroke of the keys the transfer shaft 97 will first be rocked counter clockwise by means fully described in my above identified parent application, and by the cooperation of the cams 127 with the pins 129 the several links 126 will be successively elevated thus rocking about their points of pivotal connection with levers 122 the links 126 being guided by the cooperation of concentric edges 130 of the link with the shaft 97 until the cams clear the pins whereupon the links will drop to their normal position. During the return stroke of the keys the cams 127 will engage the opposite sides of the pins 129 thereby forcing the links forwardly, the latter being guided in their movements by the slotted portions above fingers 131 engaging the shaft 97. In this manner each of the transfer pawls will be actuated and those that have been tripped will effect transfers. When the cam 127 clears the pin 129 the coil spring 128 connected between the arm 122 and its associated transfer pawl will return the parts to normal. It will be noted that as the cam 127 moves the link 126 forwardly to force the transfer pawl rearwardly the ends of the spring will be brought together thus storing up additional energy in the coil spring 128' and this energy is released when the cam 127 leaves the pin 129. Since the link 126 by moving the arm 122 stores up energy in spring 128 this energy will be expended ,to return pawl 120, arm 122 and link 126, when the latter is released from cam 127. When the link 126 is released the energy in the spring 128 will tend to rock the pawl 120 counter clockwise, but since the' pawl already contacts a stationary member the energy will be used to rock arm 122 clockwise thus forcing arm 126 rearwardly and pawl 120 forwardly.

It will be observed from what has been just stated that the upward movement of the links 126 is produced by the carp. 127 during the downward movement of the keys, and that after each cam 127 is entirely disengaged from the related pin 129 the weight of the link is depended upon to restore it to its lower position where it rests upon the shaft 97 so that shortly after this the reverse movement of the cam 127 will force the-link forwardly to effect a transfer. In rapid operations of the machine the weight of the member 126 may not be sufficient to restore it to its normal condi tion prior to return movement of earn 127. In.

order to prevent any misoperations a tension device which is common to the links 126 is provided and comprises a member 132 which is loosely pivoted on the tie rod 69 and is urged clockwise by a spring 133 so that bent extensions 134 thereof cooperate with the upper rearward edges of all of the links 126.

It will also be observed that the cam 127, as-

sociated with the transfer elements between the units and dimes denominational orders is of a different contour than the other cams, in that a considerable portion of its outer periphery isconcentric with respect to the shaft 97 so that at the beginning of the operation of the shaft the high concentric portion of this cam will almost immediately coact with the pin 129 of the related link 126 and will raise the lever and hold it elevated for a considerableperiod. Since one of the extensions 134 coacts with the upper side of this link it will rock the member 132 upwardly against the tension in the spring 135 and will retain it in this position until the operated key reaches close to the end of its downward stroke. This construction prevents a ratcheting effect which would otherwise occur as the pins 129 of the several links 126 successively drop from the high portions of their related cams 127. When the pin 129 leaves the outer concentric part of cam 127 of the lowest denominational order, the member 132 is released, so that the spring 133 will urge it downwardly and if one of the links 126 should be held elevated due to friction the related extension 134 will urge it downwardly to its normal position. This insures the restoration of the links to their normal position prior to their short move ments and it will be apparent that by this means the danger of the portions 131 coacting with the shaft 97 will be minimized if not altogether obviated. The spring 133 is tensioned only during the down stroke of the keys when the most power is available. Since the projections 134 are a slight distance above the links 126 during the return stroke of the keys the spring 133 will have no action on the arms 126 and will therefore not place any additional load on the machine at a time when the least power is available.

It will be observed that a transfer pawl and related device are provided for all of the wheels of denominational orders higher than the units order and the several orders from lower to higher are operated successively so that at the end of an operation of the machine the transfer pawls will all have been operated and by thus completing the necessary transfers the totalizing wheels will indicate the true sum registered.

Machine control In the type of machine shown in the drawings it is a common expedient to provide means whereby the keys are locked against operation while the cash drawer is exposed, and thus the operator is forced to close the cash drawer at the end of each operation so as not to leave the money contained thereinexposed between operations of the machine.

In certain uses of the machine it is desirable to disable the mechanism just described so as to permit successive operations of the machine during rush hours without closing the cash drawer after each operation. Again, it is desirable at times to lock the operating keys irrespective of the position of the cash drawer so as to prevent tampering by unauthorized persons. To provide for these functions the mechanism embodied in the illustrative machine is placed under the control of a single lever which may be operated from the exterior of the machine but which may be locked so that the movement of the lever cannot be performed except by persons having the key to the lock. The control lever is adapted to be shifted to any one of three positions to accomplish a corresponding one of the functions above mentioned. The mechanism for effecting the various functions of the control lever stated above forms no part of the present invention and consequently a detailed description thereof is unnecessary. The parent application may be referred to for a full disclosure of this mechanism.

Total and reset position of the control lever At the termination of the days business or any other selected period it is desirable to obtain the total of the sales registered so that receipts may readily be checked and after the total has been obtained resetting of the totalizers may follow. During this procedure it is desirable to obtain access to the contents of the cash drawer and to provide for all of the above functions the necessary control over the machine is effected by the control lever 180 when moved to the rearmost ,or Total and Reset position. It will be observed from Figs. 2 and 4 that the totalizer elements bear characters which may be viewed through an aperture 191 formed in the cabinet and also an aperture formed in a denominational designating plate 192. When the control lever is out of the Total and Reset position reading of the totalizer elements is prevented by means of a shutter 193 which is pivoted to the side plates 71 and 72 of the totalizer frame. Attached to a shaft 181 is an upstanding arm 194 provided with a pin engaging a closed slot formed in a link 195. The slot formed in the link 195, connected to one arm of shutter 193, is of sufficient length so that movement of the control lever to any of the three foremost positions will not operate the link 195 to move the shutter, but when the lever is moved to the Total and Reset" position the link will be drawn rearwardly against the tension of a spring 196 thereby rocking the shutter 193 to permit the resetting of the totalizer elements.

It is desirable that the control lever be aligned in its various positions when adjusted and to this end there is attached. to the control lever 180 a link 197 which is connected to a segment plate 198 pivoted to the side frame 20 by a stud 199. The segment plate 198 is provided with a plurality of aligning notches 200 adapted to engage a stud carried by the spring pawl 201. By this means it will be obvious that the control lever is held frictionally in any adjusted position, but by projecting the bolt of a lock 202, which lock is controlled by insertion of a key, through the cabinet 27 the control lever may be locked in any one of its adjusted positions. As shown, the bolt of lock 202 when projected engages 9. lug on the pawl 201 and prevents it from rocking as would be required to shift the lever 180. It is also desirable to lock the amount keys when the control lever is in the Total and Reset position. For this purpose, it will be noted that when the control lever is moved to this position the shaft 181 will be rocked counter clockwise from the position shown and through the spring 190 the locking lever 188 will be moved so that its shoulder 189 passes over the key coupler 39.

In order to release the cash drawer when the control lever is moved to the Total and Reset position it will be noted in this operation that an arm 185 will be moved sufficiently to cause a projection 203 formed thereon to contact with a stud 204 carried by the drawer catch release lever 170 rocking it suficiently so'that it will release the cash drawer. This then constitutes a manual means for releasing the cash drawer independently of an operation of the machine and it may be used for this purpose when the machine H5 may for some reason become disabled and locked up after the coupler has been partially operated.

Resetting devices Resetting in the present machine is accom- 0 plished by manually rotating the shaft 74 so that the square shoulder of a groove 205 formed therein will cooperate with resetting or pick-up pawls 206 carried by the totalizer elements. Thus. when the shaft 7 is rotated in the proper direction the groove therein will cooperate with the pick-up pawl 206 in whatever position the pawls happen to be in and carry them and the connected totalizer elements to their normal positions.

It will be noted that the relation between the groove and the pawls is such that the wheels of the totalizer are restored by rotation of the shaft 74 in the same direction in which they are driven by the actuators, so that by this construction the numeral wheels are free to rotate about shaft 74 in adding operations without causing any movement of the shaft. The shaft 74 has connected to it a resetting bar 207 which fits loosely in an aperture formed in a bracket 208 attached to the side frame 20. The connection betweenthe bar 207 and the shaft 74 is formed by inserting the bar in a slot in the shaft and passing a pin through them, thus providing a swivel connection, and is such that in the normal position of the parts, the totalizer is free to be rocked into and out of mesh with the racks. The cabinet 27 and side plate 20 are both provided with apertures 2081 through which the stem of a resetting key 209 is adapted to be inserted so that by the cooperation of a slot 210 formed in the end of 150 the key 209 with the end of bar 207 the shaft 74 may be rotated to reset the totalizer elements. In all positions of the control lever, with the exception of the Total and Reset position, an aperture 2081 in the plate 20 is closed by an integral portion of the segment plate 198. When the control lever is brought to Total and Reset position, however, a cut away portion 211 will be brought to register with the opening 2081. The plate 198 is formed with bent lugs 212 which are adapted to guide a pin 213 on the resetting key. The lugs 212 are also adapted to prevent any rotation of the bar 207 by the resetting key until the key is fully inserted, at which time the pin 213 of the key will be in its proper position within the side plate 20. Rotation of the resetting key will rotate the bar 207 and shaft 74 to zeroize the totalizer elements it being understood that cooperation of the pin 213 with the side plate 20 will prevent withdrawal of the key until the key is again brought to its normal position.

In resetting operations the totalizer elements are driven by the shaft 74 in the same direction as the actuators drive them. It will be further apparent that during resetting operations the trip pins 115 carried by the wheels will cooperate with the trip pawls 117 and trip the latter as in adding operations. For this reason it is necessary to restore the tripped transfer pawls to their normal inactive positions, otherwise irregular transfers would be eifected during the first subsequent operation of the machine. The shaft 74 has attached thereto a cam 214 which is in the plane of one arm of a bell crank 216 pivoted on the side plate 68 of the totalizer frame. The other arm of the bell crank 216 carries apin 217 engaging a bifurcation in an arm 218 attached to a shaft 219 journalled in ears integral with the cross bar 124. A coil spring 220 acting between a fixed stud and the pin 217 urges the arm 216 against the periphery of the cam 214. 'The shaft 219 is provided with a plurality of slots 221 adapted to receive and guide the transfer pawls 120, as well as to restore them. after they have been tripped during a resetting operation.

The operation of the foregoing mechanism may now be briefly pointed out. When resetting commences by manual rotation of the insertion of the resetting key a counter clockwise rotation of shaft 74 will cause the groove 205 to pick up the variously positioned pawls 206 to restore the totalizer elements. During the counter clockwise rotation of the shaft 74 the periphery of the cam 214 will cooperate with the arm 216 and gradually rock the latter and through the connections previously described, comprising the pin .217 and arm 218, will rock the slotted shaft 219 clockwise. This rotation of the shaft will carry the slots 221 away from the transfer pawls 120 and will present the total periphery of the shaft to these pawls tending to rock them slightly upwardly; the lug 121 at this time coacting with and sliding along the upper rearward edge of the trip pawl 117. When the highest part of the cam 214 contacts the arm 216 the transfer pawls will be elevated to their highest positions and by the continued counter clockwise rotation of the shaft 74 will reversely rock the bell crank 216 and 3 the shaft 219 will rock counter clockwise back to normal, thus permitting the transfer pawls 120 to be lowered. At substantially the end of a counter clockwise rotation of the shaft 74 all of the totalizer elements will be passing from their 9 to their positions, at which time the trip pins 115 will cooperate with the trip pawls 117 releasing all the transfer pawls 120 in the same manner that they are released during a rocking transfer operation.

At this time rotation of the shaft 74 will be stopped by the cooperation of an integral extension 222 of the bar 207 with a pin 223 carried by the bracket 208. Since the shaft 74 is not given a complete rotation the pin 213 of the resetting key 209 will not be in alignment with the square cut of the notch 2081 in the machine side frame so that the resetting key cannot be withdrawn until the shaft 74 is rotated reversely. Reserve rotation of shaft 74 will, in the form of embodiment shown, restore the tripped transfer pawls, but this operation will have no effect on the totalizer elements which are at this time in their zero positions. As the shaft 74 is thus rotated reversely, or in a clockwise direction, it will rock the shaft 219 first clockwise and, since at this time the transfer pawls have been released so that the lugs 121 are disengaged from the shoulders 118 and the pawls rest upon the supporting bar 124, the bottom of the slots 221 will have a caming effect upon and will elevate the transfer pawls until thelugs 121 are above the shoulder 118. At this time the transfer trip pawls 116 will be urged by their springs to their normal positions. When the high part of the cam 214 is reached continued clockwise rotation of shaft 74 will permit the shaft 219 to be restored to normal, thereby lowering the transfer pawls 120 slightly until the lugs 121 again engage the shoulders 118 of the transfer trip pawls 117. At the termination of the resetting operation the transfer mechanism is again in the position permitting transferring to be performed in the regular manner, and at the end of this operation the resetting key is withdrawn from the machine.

While the form of mechanism herein described is admirably adapted to fulfill the objects primarily stated it is to be understood that it is not intended to confine the invention to the one form of embodiment herein shown, since it may be embodied in various forms, all coming within the scope of the claims which follow.

What is claimed is:

1. In a cash register, the combination of a totalizer, a plurality of operating keys adapted to insert items in the totalizer, said totalizer comprising a plurality of readable totalizer elements, a shutter normally concealing said elements from view, a manually operable device for restoring the totalizer elements to zero, means comprising a plate for normally preventing operation of the manually operable device, means for locking the operating keys, and a single, manually operable control lever for simultaneously operating the keylocking means and moving the shutter and plate to ineffective position.

2. In a cash register, the combination of totalizer elements, a totalizer shutter adapted to prevent viewing of the totalizer elements, a manually operable control lever having various positions of adjustment and directly connected to the shutter to move the same when adjusted toone position, and a lock controlled arm for aligning and locking the control lever in its different positions of adjustment.

3. In a machine of the class described, a plurality of totalizer elements, means for actuating the same to accumulate items therein, a series of transfer pawls, means for resetting said totalizer elements by rotating the same in the same direction as they are rotated during item accumulation, means causing tripping of said pawls during a resetting operation, and means for restoring said pawls to ineffective position.

4. In a machine of the class described, a plurality of totalizer elements, a shutter normally concealing the same, a shaft supporting said totalizer elements, means normally preventing access to said shaft, a manually operable control lever, means for moving said shutter and preventing means to inoperative position when the control lever is moved to one position of adjustment, an g lever cooperating with the preventing means, and a lock, acting through the aligning lever, to retain the control lever-in any position of adjustment.

5. In a piece of the class described, a plurality of totalizer elements, a shutter normally concealing the same, a totalizer shaft, a plate norm preventing access to said shaft, means for moving said shutter and plate to inoperative position, an insertible reset key for rotating said shaft to reset said totalizer elements, and means provided on said plate to guide the key while being inserted.

6. in a device of the class described, a totalizer having transfer devices normally in ineffective position, zeroizing means for said totalizer, means whereby zeroizing of said totalizer places said devices in active position, and means whereby reverse movement of said zeroizing means restores said devices to ineffective position.

'2'. In a device of the class described, a totalizer having transfer pawls and a resetting shaft, means whereby resetting movement of said shaft causes tripping of said transfer pawls, and means whereby reverse rotation of said shaft after said totalizer has been reset restores said pawls to normal position.

8. In a machine of the class described, a totalizer having resetting means, a resetting device for engaging said means and adapted to be rotated when so engaged, a blocking member, and means on the device adapted to engage the blocking member when the device is rotated a predetermined distance in one direction, to necessitate a reverse rotation of the device before the same can be disengaged from the resetting means.

9. In a machine of the class described, a totalizer having resetting means, a resetting device for engaging said means and adapted to be rotated when so engaged, a blocking member, and means on the device adapted to engage the blocking member when the device is rotated a predetermined distance in one direction, to necessitate an 1 equal reverse rotation of the device before the same can be disengaged from the resetting means.

CLES W. GREEN.

Images