US2701100A

US2701100A - philipp

Info

Publication number: US2701100A
Authority: US
Publication date: 1955-02-01
Anticipated expiration: 1972-02-01

Description

0. M. PHILIPP Feb. 1, 1955- TENS TRANSFER MECHANISM FOR INTERSPERSED TOTALIZERS I 5 Sheets-Sheet 1 Filed June 2, 1953 to wm Qw TUE mvErgToR OTTO M. PHILIPP g m HIS ATTORNEYS Feb. 1, 1955 o. M. PHlLlPP 2,701,100

TENS TRANSFER MECHANISM FOR INTERSPERSED TOTALIZERS Filed June 2, 1955 5 Sheets-Sheet 2 INVENTOR OTTO M. RHILIPP AMQ/W HIS ATTORNEYS.

Feb. 1, 1955 o. M. PHILIFP 2,701,100

TENS TRANSFER MECHANISM FOR INTERSPERSED TOTALIZEIRS Filed June 2, 1955 i 5 Sheet-Sheec 3 INVENTOR PHILIPP HIS ATTORNEYS Feb. 1, 1955 v o. M. PHILIPP 2,701,100

TENS TRANSFER MECHANISM FOR INTERSPERSED TOTALIZERS Filed June 2, 1953 5 Sheets-Sheet 4 l NTOR OTTO PHIL! PP BY/ZW HIS ATTORNEYS 0. M. PHILIPP Feb. 1, 1955 TENS TRANSFER MECHANISM FOR INTERSPERSED TOTALIZERS 5 Sheets-Sheet 5 Filed June 2, 1953 INVENTOR OTTO M. PHHJPP HIS ATTORNEYS United States Patent TENS TRANSFER MECHANISM FOR INTERSPERSED TOTALIZERS Otto Max Philipp, Augsburg, Germany, assignor to The National Cash Register Company, Dayton, Ohio, a corporation of Maryland Application June 2, 1953, Serial No. 359,133

Claims priority, application Great Britain January 20, 1953 8 Claims. (Cl. 235138) This invention relates to tens transfer mechanisms for cash registers and similar accounting machines having a plurality of totalizers.

The specific embodiment of the invention is illustrated for use in a machine of the type shown in United States Patent No. 2,209,763, issued to Ernst Brietling on July 30, 1940.

When one of the totalizers is used as an itemizer to accumulate a total of the items making up each individual multiple-item transaction, while another one of the totalizers is used as a main totalizer to accumulate a grand total of all transactions, it is usual to mount the two totalizers either on separate shafts or side by side on he same shaft. At the end of a multiple-item transaction, the itemizer was then reset and its total transmitted to the grand totalizer. For this purpose the itemizer was engaged with the amount actuators during their setting movement, while the main totalizer was engaged with the amount actuators during their return movement and after the disengagement of the itemizer.

Only a relatively short period of time is available during a single cycle of machine operation for the actuation of all the necessary mechanisms, with the result that the latter had to function at a high speed, with consequent shocks and considerable wear and tear of the parts.

Where the two totalizers were mounted on separate shafts, of course, it was possible to engage the main totalizer with the amount actuators simultaneously with the engagement of the itemizer, so that both toalizers received the individually-entered items. Such an arrangement, however, leads to an increase in the size of the machine and consequent increased production costs.

In addition to the saving in space and manufacturing costs achieved by the present arrangement of the totalizers and their tens transfer mechanisms, only one engaging and disengaging mechanism is needed for the totalizers, as opposed to two engaging and disengaging mechanisms that would be required where the totalizers are mounted on separate shafts.

A further advantage over the previous arrangement of having the totalizers mounted separately and side by side on the same shaft is that, with the present construction, a single actuating gear can be used for entering amounts simultaneously into the two totalizers, whereas, obviously, separate gears must be used for the prior arrangement.

Furthermore, since amounts can be entered simultaneously into the two totalizers in the present machine, the engaging and disengaging movement of the totalizers can be spread over a greater period of the machine cycle than was previously possible.

It is the object of the present invention to provide a small, compact, and economical totalizer assembly comprising the two totalizers and their tens transfer mechanisms. In the new arrangement, the two totalizers are mounted on the same shaft, with their wheels of similar denominational value arranged in groups side by side. With such an arrangement, it has not previously been possible to enter amounts simultaneously into the two totalizers, due to the difficulty in providing a transfer mechanism that would accommodate both independent and simultaneous tens transfers in the two totalizers. It is, therefore, a further object of the present invention to provide tens transfer mechanism which will enable such tens transfers to be made.

According to one feature, the invention comprises a cash register or similar accounting machine including a "ice pair of interspersed totalizers mounted on the same shaft, and separate tens transfer mechanisms for the totalizers adapted to perform tens transfers either independently in each totalizer or simultaneously in both totalizers.

According to another feature, the invention comprises a cash register or similar accounting machine, including a pair of totalizers mounted in interspersed relationship on the same shaft, a common set of actuators for the totalizers, a selecting mechanism for selecting the totalizers for either independent or simultaneous actuation, an independent tens transfer mechanism for each totalizer, and a common actuating mechanism for the tens transfer mechanisms for causing either independent or simultaneous tens transfer in the totalizers.

According to a further feature, the invention comprises a cash register or similar accounting machine, including a main totalizer and a multiple-item totalizer mounted in interspersed relationship on the same shaft, a common set of actuators for the totalizers, a selecting mechanism for selecting the maintain totalizer for actuation or for selecting both the main totalizer and the multiple-item totalizer for simultaneous actuation, and independent tens transfer mechanism for each totalizer, adapted to effect tens transfers either independently in each totalizer or simultaneously in both totalizers.

With the above-mentioned and incidental objects in view, the invention includes certain novel features of constrnction and combinations of parts, a preferred form or embodiment of which is hereinafter described with reference to the drawings which accompany and form a part of this specification.

Of said drawings:

Fig. l is a front view showing the tens transfer mechamsms associated with two denominational orders of the two totalizers.

Fig. 2 is a section taken along the line 22 of Fig. 1, looking in the direction of the arrows and showing the main totalizer in selected and engaged position.

Fig. 3 is a rear view of one denominational order of the totalizers, showing both totalizers selected for simultaneous amount entry.

Fig. 4 is a similar view to Fig. 3, but showing the main totalizer selected to receive an amount entry.

Fig. 5 is a similar view to Fig. 4, but showing the item totalizer selected to receive an amount entry, and also showing the driving gear for actuating the tens transfer mechanisms.

Fig. 6 is a front perspective view of the totalizer assembly.

Fig. 7 is a rear perspective view of the totalizer assembly.

Fig. 8 is an enlarged inverted detail perspective view of one pair of tens transfer tripping members.

Fig. 9 is a side view of the machine function control lever and its connections to the totalizer shifting cam.

Fig. 10 is a section, taken approximately along the line 10-10 of Fig. 9, looking in the direction of the arrows, showing also part of the totalizer assembly.

The two totalizers and their tens transfer mechanisms are accommodated between two main totalizer assembly side frames 11 (Figs. 1, 2, 3, 5, 6, 7, 8, and 9) connected together by a totalizer-supporting shaft 12 (Figs. 1, 2, 3, 5, and 6) and a tie rod 13 (Figs. 1, 2, 3, 5, 6, and 7). Spacing and support plates 14 (Figs. 1, 6, and 7) are mounted on the shaft 12 and the tie rod 13. The whole totalizer assembly is mounted for lateral sliding movement on a shaft 15 (Figs. 3, 5, 6, and 7) by means of hubs 16 (see also Figs. 1, 2, and 10).

As can best be seen in Figs. 6 and 7, the wheels 17 of the main totalizer and the Wheels 18 of the itemizing totalizer are mounted side by side in pairs of simiiar denominational value on the shaft 12, each pair being spaced apart by means of spacing discs 19 (Figs. 1, 3, 4, 5, 6, 7, and 8) and spacing sleeves 20.

Actuating gears 21 (Figs. 1, 2, 3, 4, and 5), one for each denomination, are rotatably mounted on a shaft 22 supported between main side frames 23 (only one of which is shown in Fig. 10). The actuating gears 21 are wide enough [0 actuate the

wheels

17, 18 simultaneously and are suitably spaced apart by means of sleeves 24.

The actuating gears 21 can be set in accordance with the depressed amount keys (not shown) by means of any suitable setting mechanism, such, for instance, as that disclosed in United States patent application Serial No. 236,811, filed July 14, 1951, by Karl H. Tenoort, now Patent No. 2,666,573, issued January 19, 1954. When applied to a lever-set machine, the actuating gears can be set in accordance with the setting of levers, such, for instance, as that disclosed in the above-mentioned Breitling patent.

The totalizer assembly may be rocked to engage the wheels of the selected totalizers with the setting gears 21 by means of any suitable engaging and disengaging mechanism driven by cams on a machine main cam shaft.

When the totalizer assembly is in disengaged position, the

wheels

17 and 13 of the two totalizers are held against rotation by means of aligning pawls 25 (Figs. 2, 3, 4, 5, and 7) freely mounted on a shaft 26 secured between the side frames 11 and spaced apart by means of sleeves 27.

Springs 28 are secured between projections 29 on the pawls 25 and projections on transfer aligning pawls 30 freely mounted on a rod 31 secured between the side frames 11 and spaced apart by means of sleeves 32, so as normally to maintain the pawls 25 in engagement with their

respective wheels

17 and 18, as seen in Fig. 7.

Notches 33 (Figs. 1 to cut in a shaft 34 supported in the machine side frames 23, cooperate with the projections 29 on the pawls 25 in such a manner, as can be clearly seen from Figs. 2 to 5, that the pawls 25 for the

unselected totalizer wheels

17 or 18 remain in engagement with the said wheels, whereas full portions of the shaft 34 cooperate with the projections 29 of the pawls 25 for the selected totalizer so as to rock the pawls 25 clockwise, as seen in Fig. 2, out of engagement with the totalizer wheels as the totalizer assembly moves to the engaging position. Similarly, when the totalizer assembly moves to disengaged position, the tensioned springs 28 for the rocked pawls 25 return the latter counterclockwise, as seen in Fig. 2, until they again engage with their

related totalizer wheels

17 or 13.

Fig. 2 shows the pawls 25 for the main totalizer 17 disengaged, Fig. 3 shows a full portion of the shaft 34 holding the pawls 25 for both

totalizers

17 and 18 in disenga ed positions, Fig. 4 shows the full portion of the shaft 34 holding the pawl 25 for the main totalizer 17 in disengaged position, and Fig. 5 shows the full portion of the shaft 34 holding the pawl 25 for the itemizing totalizer .18 in disengaged position.

Totalizer selection The manner in which the totalizer assembly is moved axially in relation to the setting gears 21, for the purpose of selecting either of the

totalizers

17 or 18, or both, prior to a machine operation, for actuation by said gears 21 during the ensuing machine operation, will now be briefly described.

A manually-operable function control lever 35 (Figs. 9 and is pivotally mounted on a main shaft 36 supported in the machine side frames 23 (Fig. 10). This lever 35 has six positions of adjustment, which are Sub-total main totalizer 17 Sub-total itemizing totalizer 18;

Add in main totalizer 17;

. Add in itemizing totalizer 18 and main totalizer simultaneously;

. Total itemizing totalizer 18; and

. Total main totalizer 17.

Position No. 3 is used when entering single items which are to be added into the main totalizer 17 only.

Position No. 4 is used for the individual items comprised in a multiple-item transaction. which are to be added into both the main totalizer 17 and the itemizing totalizer 18.

Position No. 5 is used when the total of the items comprised in the multiple-item totalizer 18 is to be taken.

The lever 35 can be located in any of its positions by means of a spring-urged pawl (not shown) cooperating with the notches shown in the upper surface of the lever in Fig. 9.

A lower surface of the lever 35 is formed as a toothed segment 37 (Figs. 9 and 10) meshing with teeth 38 in a toothed segment 39 freely mounted on a stud 40 in the left side frame 23.

The segment 39 has a set of teeth 41 in its lower edge meshing with a gear 42 free on a shaft 43 journaled in a sleeve 44 secured to the left side frame 23.

Fast on the right-hand end of the shaft 43 is a drum cam 45 (Fig. 10) having a cam groove 46 cut in its periphery.

Secured to the bush 16 (Figs. 1, 2, 3, 5, 6, and 10) on the left-hand totalizer frame 11 is a totalizer assembly shifting member 47 (Figs. 6, 7, and 10), carrying a roller 48 (Figs. 6 and 7) engaging in the cam groove 46.

Manual movement of the lever 35 (Figs. 9 and 10), prior to a machine operation, will correspondingly rotate the segment 39 and the gear 42, so that the cam groove 46, cooperating with the roller 43 (Fig. 7), will cause the totalizer assembly to be shifted axially, either to the right or to the left, on the shaft 15 (Figs. 3, 5, 6, 7, and 10), to position either the

wheels

17 or 18, or both sets of wheels, into alignment with the actuators 21 (Figs. 2 to 5) for actuation thereby when the totalizer assembly is rocked to engaging position.

When the lever 35 (Figs. 9 and 10) is moved to its sub-total or its total-taking position, it will control suitable mechanism to cause the totalizer assembly to be rocked to engaged and disengaged positions at the appropriate times during the cycle of machine operation.

Secured to a bush 49 (Figs. 5, 6, and 7), fastened to the left side frame 11, is a pair of spaced aligning discs 50, which can be engaged in a suitable manner by a cooperating aligning member (not shown), so as to align the totalizer assembly in any one of its three setting positions; i. e., totalizer 17 selected, totalizer 18 selected, or

totalizers

17 and 18 selected.

Tens transfer mechanism Since the totalizer 17 is used as a main totalizer and the totalizer 18 is used as an itemizing totalizer, it is obvious that, after the completion of the first series of multiple-item entries following a resetting of both the totalizers, the two totalizers will thereafter contain different amounts, and, therefore, their respective tens transfers, for corresponding denominational orders, will occur either at the same time or at different times, in accordance with the value of the amounts standing therein and the value of the amounts being currently added thereto. For

this reason a single tens transfer mechanism, common to two totalizers whose respective wheels of similar denominational order are arranged side by side on a common shaft, cannot be used for effecting simultaneous transfers in the two totalizers, and it has not previously been found possible to provide independent tens transfer mechanism for each of such totalizers which will function when both totalizers are actuated simultaneously.

The present machine, however, provides a solution of this problem by a simple and compact arrangement of indiv dual tens transfer mechanisms for each of the two totalizers, and by the provision of a common actuating member for the two sets of tens transfer mechanisms.

The tens transfer mechanisms, and their actuating mechanism, will now be described.

Each wheel of the

totalizers

17, 18 is provided with a usual long tens transfer tooth 51 (Figs. 2, 6, 7, and 8).

A rod 52 (Figs. 1, 2, 6, and 8) is secured between trunmons on each of the totalizer assembly side frames 11 and supports a series of freely-mounted tens

transfer tripping members

53 and 54, one pair for each denominational pair of

totalizer wheels

17 and 18.

The tens transfer tripping members 53 each has a pair of mutually-offset arms 55 (see also Fig. 2), and 56 (Figs. 6 and 8), and the tens transfer tripping members 54 each has a pair of mutually-offset

arms

57 and 58. The

arms

55 and 57 lie in the plane of tens transfer tripping teeth 51 on the corresponding totalizer wheels, while the

arms

56 and 58 lie in the plane of corresponding ones of a pair of tens transfer entering members 59 and 60 (Figs. 1, 2, and 8) for the next higher denominational order and mounted on a shaft 61 secured between the side frames 11 of the totalizer assembly.

Each tens

transfer entering member

59 and 60 has three arms, as can be seen in Fig. 2, which can be pro gressively brought into engagement, by a counterclockwise movement as seen in this figure, with the teeth of the related

totalizer wheel

17 or 18, as will be described later.

The tens transfer aligning pawls 30 resiliently engage one tooth of each of the tens

transfer entering members

59 and 60, as can be seen in Fig. 2, so as to retain them in their set positions and to prevent overthrow during their actuation in a manner described later.

Pairs of torsion springs 62 (Figs. 1 and 2) are wrapped around spacing sleeves 63, which properly space the tens

transfer entering members

59 and 60, and each spring has one end bearing against a stud 64 on the corresponding tens

transfer tripping member

53 or 54, and the other end bearing against one of the sleeves 20 (Figs. 1, 2, 3, 4, 5, and 6), so as normally to maintain the arms 55 and 57 (Figs. 2, 6, and 8) in the path of the tens transfer tripping teeth 51 (Figs. 2, 6, 7, and 8).

The members 53 are bent downwardly, as can be seen in Fig. 2, and are apertured to be engaged by the rod 52, while the arms 57 are also apertured so as to be engaged by the said rod 52. The tens transfer tripping members 54 are also provided with additional arms, which are apertured to receive the rod 52.

Rotatably supported within the bush 49 (Figs. 5 and 6) is a tens transfer actuating shaft 65 (Figs. 1, 2, 3, 4, 5, 6, and 7), to the left-hand end of which is secured a driving gear 66 (Figs. 5, 6, and 7).

By means of a toothed slide (not shown), driven by means of cams on the machine main cam shaft, the gear 66, and thereby the shaft 65, can be rocked backwards and forwards at each machine operation.

Pinned to the shaft 65 is a pair of studs 67, one of which is shown in Fig. 1, engaging in elongated apertures 68, only one of which is shown, in a sleeve 69 surrounding the shaft 65 and extending across the entire width of the totalizer assembly.

The sleeve 69 has a series of wide apertures 70, two of which are shown in Fig. 1, one aperture being provided in each denominational order of the

totalizers

17, 18, and each aperture being sufficiently long to accommodate the arms of both of the corresponding pair of tens transfer entering members 59 and 60 (see also Fig. 2) when the latter have been tripped, as will be described later. The apertures 70 are helically disposed radially around the sleeve 69, so that they cooperate seriatim with the

members

59 and 60, commencing with the lowest denomina tional order.

Adjacent each elongated aperture 70, the shaft 65 is counter-bored helically so as freely to receive the noses of any tripped arms of the tens

transfer entering members

59 and 69.

By the cooperation of the studs 67 (Fig. 1) with the aperture 68, the sleeve 69 will be correspondingly rocked at each rocking movement of the shaft 65.

In the usual manner, when the

totalizer wheels

17 or 18 are reversely rotated upon total or sub-total-taking operations, abrupt faces on the tens

transfer tripping members

55 and 57 will cooperate with the long teeth 51 of the totalizer wheels to arrest the latter in their zero positions.

Since the highest order pair of

totalizer wheels

17, 18 has no tens

transfer tripping members

55, 57 associated therewith, there is provided a pair of zero control pawls 71 and 72 (Fig. 6) rockably mounted on the rod 52 and urged by springs so that abrupt surfaces of said pawls 71 and 72 will lie in the path of the long teeth 51 of the two highest

order totalizer wheels

17 and 18 and thereby arrest them in th lr zero positions for sub-total-taking and total-taking operations.

The operation of the tens transfer mechanism will now be described.

Assuming that both the wheel 17 and the wheel 18 have passed from 9 to 0 during a simultaneous amount entry from the actuating gears 21, the

arms

55 and 57 will be contacted by the long teeth 51, and the tens

transfer tripping members

53 and 54 will be rocked counterclockwise about the rod 52, as seen in Fig. 2, against the action of their springs 62, causing the arms 56 and 58 (Figs. 6 and 8) to contact the cooperating arms of the pair of tens transfer entering members 59 and 60 (Figs. 1, 2, and 8), rocking the latter also counter-clockwise, as seen in Fig. 2. The arms of the members 59 and 6%) will thereupon enter the aperture 70 in the sleeve 69 until arrested by contact with the full surface of the shaft 65. Upon the first rocking movement of the tube 69, after the disengaging movement of the totalizer assembly, the rear edge of the aperture 70 will now contact the rear surfaces of the two arms of the tens

transfer entering members

59 and 60, so that at this time the upper right-hand arms of the

members

59 and 60, the former of which is shown in Fig. 2, will engage between two teeth of the

corresponding totalizer wheels

17 and 18, advancing the latter by one step to make the tens transfer.

At this time, the aligning pawls 25, engaging the teeth in the

totalizer wheels

17 and 18, will hold them in their new positions, while the pawls 30 will locate the tens transfer entering members also in their new positions, while the shaft 65 and the sleeve 69 are rocked in the opposite direction to their home positions.

As soon as the long teeth 51 of the

totalizer wheels

17 and 18 pass beyond the

arms

55 and 57 of the tens

transfer tripping members

53 and 54, the tensioned springs 62 will immediately return the latter to their home positions, as shown in Fig. 2, wherein forwardlyextending arms thereof rest against the sleeves 63.

If only the main totalizer 17 has been selected for amount entry, and a tens transfer occurs, then only the arm 55 of the tens transfer tripping member 53 will be rocked to cause the tens transfer in the next higher order, and, if the itemizing totalizer 18 only is selected, as may be arranged if desired, then only the arm 57 of the tens transfer tripping member 54 will be rocked if a transfer is to be made.

From the foregoing it will be apparent that, if tens transfers are prepared simultaneously in both the totalizers, then simultaneous tens transfer will be made to the next higher orders of said totalizers, while if a tens transfer is prepared in only one or the other of the totalizers, while selected together or independently for addition, then the tens transfer will be made only to the next higher order of the appropriate totalizer.

Since, in the present machine, the totalizers are selected prior to a machine operation, by means of the manual lever 35 (Figs. 9 and 10), complicated machine-operated selecting mechanisms are dispensed with, and total and sub-total-taking operations can be performed in a shorter machine operating time than was previously necessary with such machine-operated selecting mechanisms. If desired, however, of course, the totalizers could be selected by the latter mechanism under the control of depressed keys.

If desired, the manual lever 35 could be replaced by depressible keys which also cause a direct selection of the totalizer prior to a machine operation.

While the form of mechanism shown and described herein 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 or embodiment disclosed herein, for it is susceptible of embodiment in various other forms.

What is claimed is:

1. A cash register or similar accounting machine, including a pair of totalizers mounted in interspersed relationship on the same shaft, a common set of actuators for the totalizers, a selecting mechanism for selecting the totalizers for either independent or simultaneous actuation, an independent tens transfer mechanism for each totalizer, and a common actuating mechanism for the tens transfer mechanisms for causing either independent or simultaneous tens transfer in the totalizers.

2. A cash register or similar accounting machine, including a main totalizer and a multiple-item totalizer mounted in interspersed relationship on the same shaft, a common set of actuators for the totalizers, a selecting mechanism for selecting the main totalizer for actuation or for selecting both the main totalizer and the multiple-item totalizer for simultaneous actuation, and independent tens transfer mechanisms for each totalizer, adapted to effect tens transfers either independently in each totalizer or simultaneously in both totalizers.

3. A machine according to claim 1, including, for each denominational pair of totalizer wheels, a pair of tens transfer entering members rotatably mounted side by side, and a pair of tens transfer tripping members pivotally mounted side by side on a common support, said tens transfer tripping members each having a pair of arms, one of which cooperates with a tens transfer tooth on a corresponding totalizer wheel, and the other of which cooperates with the tens transfer entering member in the next higher denominational order.

4. A machine according to claim 2, including, for

each denominational pair of totalizer wheels, a pair of tens transfer entering members rotatably mounted side by side, and a pair of tens transfer tripping members pivotally mounted side by side on a common support, said tens transfer tripping members each having a pair of arms, one of which cooperates with a tens transfer tooth on a corresponding totalizer wheel, and the other of which cooperates with the tens transfer entering mem ber in the next higher denominational order.

5. In a cash register or similar accounting machine, including a pair of interspersed totalizers mounted on the same shaft, a pair of tens transfer entering members rotatably mounted side by side on a common support, a pair of tens transfer tripping members mounted side by side on a common support, said transfer tripping members each having a pair of arms, one of which cooperates with a tens transfer tooth on a corresponding totalizer wheel, and the other of which cooperates with the tens transfer entering member in the next higher denominational order, said first-mentioned tripping member is formed as a yoke embracing the corresponding arm of the other tens transfer tripping member, and the other arm of the latter is formed as a yoke embracing the corresponding arm of the firsbmentioned tens transfer tripping member.

6. A machine according to claim 1 wherein the tens transfer mechanism includes a tens transfer entering member for each totalizer element of the pair of totalizers, and the common actuating mechanism includes a sleeve common to all of the tens transfer entering members and having a series of helically-disposed radial apertures therein, one aperture for each entering member, adapted to receive and actuate the latter when tripped for tens transfer.

7. A machine according to claim 2, including an actuating sleeve common to all of the tens transfer mechanisrns for each totalizer and having a series of helicallydisposed radial apertures therein, one for each tens transfer entering member, adapted to receive and actuate the latter when tripped for tens transfer.

8. A machine according to claim 5 having an actuating sleeve common to all of the rotatable tens transfer entering members and having a series of helicallydisposed radial apertures therein, one for each pair of rotatable tens transfer entering members, adapted to receive and actuate either or both of the latter when tripped for tens transfer.

No references cited.