US2298343A - Resetting mechanism for counting devices - Google Patents

Description

Oct. 13, 1942; K. c. BUGG 2,298,343

RESETTING MECHANISM FOR COUNTING DEVICES Filed Aug. 16, 1939 4 Sheets-Sheet l INVENTOR Oct, 13, 1942. K, Q BUGG 2,298,343

'RESETTING MECHANISM FOR COUNTING DEVICES Fild Aug. 16, 1939 4 Sheets-Sheet 2 INVENTOR fig/11g 6 My ATTORNEYS Oct. 13, 1942.

K. c. BUGG 2,298.343 RESE TTING MECHANISM FOR COUNTING DEVICES 7 Filed Aug. is) 1939 4 Sheets-Sheet 3.

7&6

i h a 5 a a 102% 5 III 92 vINVENTOR 2" 6 51% I #36 ATT RNEYS Oct. .13, 1942. K. c. BUGG 2,293,343

RESETTING MECHANISM FOR COUNTING DEVICES Filed Aug. 16, 1939 4 Sheets-Sheet-4 INVENTOR Algly 6 Egg Patented Uct. m, we.

RESETTING MECHANISM FOR COUNTING DEVICES Kenly C. Bugs,

Farmington, Mo., assignor to Neptune Meter Company, a corporation of New Jersey Application August 16, 1939, Serial No. 290,402

Claims.

This invention relates to resetting mechanism for counting devices such, for example, as are used in computers for gasoline dispensing pumps. One of the principal objects of the invention is to provide an improved and accurate counting device having a compact and relatively simple resetting mechanism.

Important features of the invention are the provision of a novel clutch connection between the driving means and one or more counters; the provision of novel brake means in cooperation with the clutch connection for holding the driving means against movement during resetting;

and the provision of reset driving and controlling means for actuating the clutch connections and brake means in a predetermined order.

Additional objects and features of the invention will become apparent upon consideration of the following detailed description and the appended claims when read in connectionwith the accompanying drawings, in which:

Figure l is a view in vertical elevation of the computer head with parts broken away to show the details of one of the counter units;

Figure 2 is a plan view of one of the counter units with parts broken away to illustrate the zero stop pawl arrangement for the counting elements;

Figure 3 is a rear view in elevation of the upper counter unit of Figure 1 showing the transfer mechanism thereof;

Figure 4 is a vertical cross-sectional view taken approximately on line 44 of Figure 1 showing the counting element of lowest order and the associated transfer mechanism;

Figure 5 is a vertical cross-sectional view taken on line 5--5 of Figure 1, showing the tens next higher counting element and the associated transfer mechanism;

Figure 6 is a view in vertical elevation on a reduced scale of the driving and resetting mechanism for the several counters of a computing device;

Figure '7 is a fragmentary view in vertical elevation of the driving and resetting mechanism in a pullback position;

Figure 8 is a fragmentary view in elevation showing the brake device in brake actuating position; v

Figure 9 is a fragmentary view inside elevation of the driving and resetting mechanism near the end of a resetting operation with the clutch connections in clutch engaging position;

Figur 10 is a sectional view taken on line Iii-l0 of Figure -'l to show the details of the clutch connection and brake device;

Figure 11 is a view inside elevation of the means for controlling the cyclic operation of the reset mechanism.

Referring to Figures 1 and 6 of the drawings, a computer head is illustrated embodying the features of the present invention which is provided with a plurality of counters adapted to indicate the amount and cost of a substance or units being counted. For example, the computer head comprises a supporting fram l0 upon which are mounted counter units l2 and [2a, [3

and 13a (Fig. 6) and a driving and resetting mechanism 14. The upper counter units 12 and 12a are provided with appropriate characters in the order of units, tens and hundreds representing the cost of the substance being counted, while the'lower counter units l3 and l3a are provided with appropriate characters in the same order representing the amount, such as volume, length, number, etc., depending upon th character of the substance being counted. ,Disposed between the four counter units is aform of my improved resetting mechanism which is adapted to reset all four counters simultaneously. I

, The construction and assembling features of the particular counterv units illustrated with this invention are the subject matters of my co-pending applications-Serial No. 84,657, filed June 11, 1936; Serial No. 180,526, filed December 18, 1937, and Serial No. 290,401, filed August 16, 1939.

Since all four counterunits are similarly constructed, counter unit l2 only will be described 1 in sufficient detail to give an understanding of the counter mechanism adaptable for use with th present invention.

Referring to Figures 1 to 5 of the drawings, the counting mechanism comprises a bank of three counting element or numeral wheels I5,

l6 and II in the order of units, tens and hundreds, respectively. The numeral wheels are mounted on a shaft [8 to receive driving movement therefrom during both counting and resetting operations. The units wheel is frictionally supported on the shaft 18 by a clutch 20 which is adapted to provide an effective driving connection for the units wheel during movement of the shaft in a counting direction and a releas-' able driving connection for the units wheel during movementof the shaft in a reverse or resetting direction.

The clutch 20 comprises a flanged sleeve-like member 2| carried by the shaft l8 and a member 22 threadably mounted on the sleeve portion ofthe member if for rotary movement relative zero stop pawl 28. Upon movement of the shaft to the shaft in directions toward and away from IS in a reverse or resetting direction, all three a-flange 23 on member 2|. The units wheel l5 numeral wheels are adapted to be rotated backls provided with a frictionally engageable hub 24 wardsuntil they are engaged by their respective interposed between the member 22 and the flange 5 zero stop pawls. Upon reaching zero position, 23. A spring 25 coiled about the shaft 58 with each numeral wheel is held against further backone end thereof secured to the shaft and the ward rotation during the remaining portion of other end secured to the member 22 is adapted the resetting cycle.

v to urge the member 22 in rotary movement to- The transfer control mechanism of the counter ward the flange as to edect a driving connection assembly which is supported on the mgle bar between the hub 23 and the shaft is during both 32 independent of the Shaft 58 s e d in p counting and resetting ,movements. interposed tive position by mounting the member 32 between between member 22 and the hub 2d is a floating a pair of end plates at and to; The end plates washer 26 which serves to give the clutch a sensiare provided with. hearings or for rotatably suptive releasing characteristic during resetting po ti e S t/M3- The angle member 32 s mover ent. held in place between the end plates by a plu- Upon initiation of a counting movement, the e ty of p s i s Tie ds 9 Wit rotation of shaft is is transmitted to the units spacer sleeves 55 are p v d t e o co e wheel through the coactive clutching action of f the e d p a s 5 d 535 t Secure the p s members and The spring 25 tends to r 2a in spaced relation, certain of the tie rods extendtate the clutch member 22 with increasing force g ey nd the plate 55 to p i e Se means to urge the washer into gripping relation with f r mounting th c un er s m ly s a unit u n the hub of the units wheel to thereby provide the frame of a computer. The t e ods are p an effective driving connection between the units vided with nuts 52- and 53 to clamp t e e plates wheel and shaft it. During resetting operations, 25 in position against the spacer sleeves 5i and the the spring 25 tends to retract the clutch member angle me be e e te ed DO 55 0 22', but not sufficient to release the units wheel the tie rods be (see Figure l) are adapted to prountil the wheel engages a zero stop pawl 28. trude through openings b6 formed in the frame Since the floating washer 25 provides an addiiii so that nuts 5? may be applied for securing tional frictional clutch surface, the clutch memthe C e a y 1113011 the frame ber 22 is rendered more sensitive to releasing Each of the counter units is provided with a forces. casing 3b to minimize the infiltration of dust The tens and hundreds wheels is and ii are into the working parts of counter assembly. The each mounted in spaced concentric relation on casing Whichincludes the end plates 55 and 33 the shaft 5 and supported by a disc 5353. They 35 is provided with appropriately spaced Windows are frictionally driven through coaction of the bi through which the numeral wheels may be disc 353 and a series of rollers 38, as indicated in viewed. Since the drive shaft to the numeral Figures 1 The transmission of movement wheels is the only moving part which extends from the shaft it to the tens and hundreds through the casing it will be apparent that the wheels during a counting operation is controlled casing'provides a substantially dustproof encloby a transfer mechanism mounted on a longitudisure for the counter unit. I nal angle member $52. The tens and hundreds It is important to note that the counting elewheels arenormally-held against forward countmerits of each counter are adapted to be driven ing movement by pawls 33 and 35 (Figure 3) pivfrom the shaft it during both counting and reotally mounted on the member '32. Movement 4.; setting operations, the shaft being rotated in a of the pawl 33 is controlled by an arm 3b, which reverse direction for resetting. The driving and is also pivotally mounted on themember 32 and resetting mechanism of the present invention biased by a spring 3'17 to engage a surface of the provides connections for the counters whereby units wheel. A cam lug 38 is provided on the each-counter may be independently removed or surface of the units wheel to actuate the arm replaced without altering or disassembling any 38 and thereby pivot the pawl-33 clear of the tens other part of the computer mechanism. wheel. The tens wheel being-in frictional driv- Having described a representative type of meching relation with the shaft 6 8, the release there- .anism to which my invention may be applied, of by the pawl 33 permits the shaft to move the I shall now describe thatv form of the resetting tens wheel forward with the units wheel. The mechanism which embodies the novel features cam 38 is such, however, as to release the pawl of m invention. shortly after the pawl disengages the tens wheel Referring to Figures 1 and 6 of the drawings, so that after the tens wheel has moved one step it will be noted that the shaft it of each counter h pawl is adapted to reengage one of a seri unit is mounted at right ,angles to the frame of openings 39 in the surf e of the tens whe it of the computing device. The corresponding to hold the tens wheel until transfer movement ters i2, i211 and i3, 03a are interconnectedis again required. for corresponding movement by shafts 62 and The transfer control between the tens and hun- 63, mounted in bearings 6d and 65, respectively. dreds wheels is similar to that between the units Referring to the upper counter units i2 and and tens wheels, except that an arm' w pivotally 5 lie the shaft 62 intersects at rightangles the mounted on a member 66 which isconnected by center line of the shafts iii of the counter units. a link id to pawl 35 (Figure 5) is adapted to be Bevel gears 33 and 61 are provided on the shaft actuated by a cam knob 42 to a position overlap- 32 to mesh with bevel gears 68 and 68a of count pingthe pawl 33 at the end of the ninth step ers l2 and 12a, respectively. The lower shaft of the tens wheel so that upon the tenth step "0 33 is provided with a similar bevel gear connec-' h t s Wheel the pawl 34 of the hundreds tion for transmission of motion to counters l3 wheel is actuated together with pawl 33 to simuland l3a. taneously release the tens and hundreds wheels. The upper. and lower counter units are driven The tens and hundreds wheels are provided independently-of each other by drive shafts 10 with zero stop pawls 43 similar to the units wheel and II. Where the computer is used i gonnecmetering device through a price variator mechanism (not shown) whereby the cost indications may be correlated with respect to the price indicated by the price variator mechanism.

A clutch shaft 12 is driven m the drive shaft 10 through bevel gears 13 and 14.

The driving movement is transmitted from the clutch shaft 12 to the upper counter units through a clutch gear 15, an idler gear 16 and a gear device 80. The gear device 80 of counter I2 includes the bevel gear 68 and a spur gear 82. The gear 82 meshes with the idler gear 16 whereby movement in a counting. direction is transmitted to the shaft I8 of counter I2 and to the corresponding shaft of counter I 2a by transmission through bevel gears 68 and 56, the shaft 62 and bevel gears 61 and 68a. The drive during a counting operation to the lower counters I3 and I 3a from a clutch shaft 84 is identical with that described in connection with counters I2 and I2a, the clutch shaft 84 being driven from drive shaft H by a pair of bevel gears similar to gears 13 and 14.

For the purpose of simultaneously resetting the gear 82a of the gear device 80a whereby counters I2 and I2a are driven in a reverse'direction toward zero position, the motion being transmitted to the counter I2 from counter I2a backward-through bevel gears 68a, 61, the shaft 62 and bevel gears 66 and 68. The resetting drive to counter units I3 and I3a is identical with the drive to I2 and I2a just described.

The clutch. connection 92 for transmitting movement between the clutch shaft 12 and idler gear 16 is shown in detail in Figure 10. Keyed to the shaft 12 is a gear 93 which provides a friction surface 94 adapted to engage the clutch gear 15 which is rotatably mounted 'on the shaft 12. The shaft 12 is threaded at 95 to a point adjacent gear 15. A clutch block 95 is threadably mounted on the threaded portion 95 for rotary movement relative to shaft 12 in directions toward and away from the keyed gear 93 to grip and release the clutch gear 15. The clutch block 96 is biased for movement toward the gear 93 by a spring 91 coiled about the shaft 12 with one end connected to the block 96 at 98 and the other end to a disc 99 rotatively adjustable and secured to the shaft 12 against shoulder I M by a nut I00. The actuation of the clutch block 96 is controlled by the resetting mechanism through.

an arm I02 which is rotatably mounted in an annular recess I03 formed in the block 96. The surface of the block 96 adjacent the arm I02 is provided with ratchet teeth I04. A pawl I05 pivotally mounted on the arm I02 and biased by a spring I06 (Figure 7) to engage the ratchet teeth I04 is adapted to retract the block 96 and thereby release the gear when the arm I02 is moved counterclockwise, as viewed in Figure 6.

e For the purpose of holding the drive shaft against movement during resetting operations a brake H0 is provided (Figures 1, 7, 8, 9 and 10). The brake includes a stationary shaft in the form of a double-headed bolt II2 rigidly secured to the frame I0 by a nut II 3 in spaced parallel relation to shaft 12. A gear H4 is rotatably mounted on the bolt H2 in friction engaging relation with the frame I0 and in mesh with pose of retracting the brake block near the end of a resetting operation to thereby release the shaft "for normal counting operations.

The lower counter units I3 and I3a are provided with a clutch I22.and a brake device 123 which are of substantially the same construction as clutch 92 and brake device H0. The arms I02 and I24 of the two clutches 92 and I22 are interconnected by a link I25 whereby the clutches are adapted to be actuated simultaneously. A spring I26 is connected to the link I25 to bias the clutch arms I02 and I24 in a clockwise .direction, as viewed in Figures 6, '1 and 9.

The brake devices H0 and I23 are also arranged for simultaneous operation, the brake arms H8 and I29 being connected by a link I28, biased by a spring I30 in a clockwise direction, as viewed in Figures 6, 7 and 9.

The predetermined order of actuating the links I25 and I28 is controlled by a cam disc I32 and a cam lug I34 carried by the reset shaft 85. The link I25 is provided with a roller I35 which engages the surface of the cam disc I32. The arm I 29 of the brake device I23 is provided with a finger I36 which is adapted to be engaged by the lug I34.

The cyclic movement of the reset shaft 85 is controlled by a notched disc I40 (see Figures 9 and 11). Cooperating with the notches MI and I42 of the disk I40 are zero stop pawl I43 and pullback limiting pawl I44. Pivotally mounted on the frame I0 adjacent the zero stop pawl I43 is a latch I45 biased by a spring I46 to engage a pin I41 on the zero stop pawl I43. Figure 11 illustrates the position of Zero stop pawl I43 in engagement with the notch I4I at the end of a resetting operation, the pawl operating to prevent continued movement of a shaft in a clockwise direction. To initiate anew resetting operation the shaft 85 must first be rotated in a counterclockwise direction, as viewed in Figures 9, and 11, until the pawl I44 engages the notch I42. This pullbackniovement operates to dislodge the pawl I43 from the notch MI. The resulting clockwise movement of the pawl I43 raises the pin I41 sufliciently for the shoulder I48 of the latch I45 to slide beneath the pin thereby retaining the pawl I 43 free of the notch I4I, a position shown in Figures '1 and 9. After the reset shaft 85 has'been rotated counterclockwise throughout the extent of a pullback movement, the shaft 85 may then be rotated in a clockwise direction through one and a fraction rotations until the latch I45 has been tripped by the pin I49 to permit the zero stop pawl I43 to enter notch HI and terminate the resetting operation.

.It will thus be understood that the zero resetting mechanism'is first'given a slight pullback movement to withdraw thezero stop pawl and thena forward movement during which the shafts I8 of the several counters are driven in a reverse direction to return the counting elements to zero position, the stop pawl being releasedf'or movement to stopping position near the end of the resetting operation.

A cyclic operation of the driving and resetting mechanism is described herebelowby setting forth the relative positioning of parts at certain points during a resetting operation. The counter units I2 and l2a only are referred to in this description of operation for the sake of engage the ratchet teeth I04, retracting the block 95 to release the clutch gear With the roller I35 raised to the cam surface I56, the reset mechanism is then in a position to initiate resetting movement of the counter shafts I8.

(5) Immediately following the movement of the roller I35 onto the surface I58, the mutilated gear 8| isadapted to engage the teeth of gear Continued rotation of the reset shaft causes the mutilated gear 9I. to drive gear 82a to reset counter I2d backwards to zero position, the reset- The clutch block 98 is in I5. The brake device IIII is in retracted position releasing the gear II4, whereby shaft I2 is capable of being driven by a source of power such as a meter or the like.

- (2) During the pullback movement of the 'reset shaft to the position indicated in Figure '7, where pawl I44 engages the notch I42, the zero stop pawl is dislodged from the notch MI. and latched in raised position by latch I45. The right hand side of the latch I45 (Fig. 11) is engaged by the pin I49 during the pullback movement to urge the shoulder I48 of the latch beneath the lug I41 on the zero stop pawl I43. The pullback movement also causes the cam lug I34 to be withdrawn from the finger I36, thus permitting the spring I to move brake arms (3) Initial clockwise movement of the resetting shaft 85 causes the cam lug I34 to engage the finger I36 to actuate brake arms I I8 and I29 in a counterclockwise direction, whereupon the pawl I II9 rotates the brake block II6 to an extreme retracted position, that is, until the pawl II9 engages an abutment I51 (and pawl I52 of brake I22 engages an abutment I53), whereupon the ratchet teeth I20 are disengaged and the brake block H6 released for rotation by spring I" to locking engagement with gear I I4. The extreme or releasing position for the brake arms I I8 and I29 is illustrated in Figure 8. By this actuation of the brake device M0, the drive shaft I2 is held against movement during resetting of the count ing elements.

(4) By continued movement of the reset shaft in a clockwise direction the cam lug I35 is caused to disengage the finger I38 whereby the brake arms I I8 and I29 assume the positions illustrated in Figures 7 and 9 by action of spring E38. At about this point in the movement of the reset shaft, the inclined surface I55 of cam ISZengages the roller I35 to actuate the link I255, rotating the clutch arms I02 and i2 5 counterclockwise. This movement of arm 882 causes the pawl I05 to ting movement being transmitted from counter I2a to counter I2 through bevel gears 68a and 81, the shaft 62, and bevel gears 66 and 88. The resetting movement is transmitted to counters I3 and I3a by a similar driving mechanism.

The ratio between the mutilated gear and the gear 82a is such that the mutilated gear is adapted to rotate the gear 821: and therefore shafts I8 about one and one-half rotations during a resetting movement.

(6) The mutilated gears disengage the gears of the counters just before the lip portion I58 of cam I32 engages the roller I35. The lip portion I58 is adapted to raise the roller I35 to move the clutch arms I02 and I24 to their extreme raised position -(see Figure 9). Upon movement of arm I02 to this position, pawl I05 engages an abutment I60, releasingthe clutch block 96 for movement by the spring 91 to clutch engaging relation with gear 15. The pawl I5I associated with arm I24 engages an abutment I82 at the same time pawl I05 engages abutment I60. When the lip I58 disengages the roller I35 the link I25 is caused to rotate clutch arms I02 and I24 clockwise by spring I26 to the position illustrated in Figure 6.

(7) A continued rotation of the shaft 85 causes the cam lug I34 to engage the finger I36, rotating the brake arms H8 and I29 in a counterclockwise direction. This .movement retracts the brake block I I6 by engagement of pawl I I9 with ratchet teeth I20, whereby the gear H4 is released, thus unlocking the drive shaft I2 for normal operation. The arms H8 and I28 are retained in retracting position, as shown in Figure 6, by continued engagement of the cam lug I34 with finger I36. Just prior to the completion of the resetting movement, the pin I49 is adapted to engage and trip latch I45 to release the zero stop pawl I43 to terminate the resetting operation with the mechanism in the position illustrated in Figure 6.

From the foregoing it will be clear that the counters I2, I21: and I3, I31: are reset to zero position by a movement which holds the driving means against movement and releases the counters for movement independent of the driving means. The mutilated gears pick up the drives to the several counter units to reset the numeral wheels backwards to zero position where they are engaged by zero stop pawls, the frictional connection between the numeral wheels and their respective drive shaft I8 permitting the numeral wheels to be held in zero position during the remainder of the resetting movement. After the shafts of the several counters have been rotated through approximately one and one-half rotations to insure complete resetting of the numeral wheels, the mutilated gears become disengaged, the clutch connection actuated to reconnect the counters to the driving means and the I brake devices actuated to cause the release of the driving means. Thus, the counters are reset to' zero position and prepared for a new counting operation.

While I have shown only one form of resetting of the invention and not to limit the scope of the claims.

I claim:

1. The combination with a counter and a shaft operable to drive said counter in opposite directions to perform Counting and resetting operations; of driving means for actuating said shaft in a counting direction, resetting means for actuating said shaft in a resetting direction, means operative upon initiation of a resetting operation to hold said driving means against movement and release said shaft for movement independently of said driving means, and means operative after the counter reaches zero position to disconnect said holding means and to connect said driving means and said shaft.

2. The combination with a counter and a shaft operable to drive said counter in opposite directions to perform counting and resetting operations; of driving means for actuating said shaft in a counting direction, a disconnectible connection between said shaft and said driving means, resetting means for actuating said shaft in a resetting direction, a pair of devices associated with said driving and resetting means, one of said devices being arranged to hold said driving means against movement during resetting and the other of said devices being arranged to effect release of the connection between said shaft from said driving means upon initiation of a resetting operation and to reestablish the connection between said shaft and said driving means after the counter reaches zero position.

3. The combination with a counter and a shaft operable to drive said counter to perform counting and resetting operations; of driving means for actuating said shaft to perform a counting operation, resetting means including a mutilated gear for actuating said shaft to perform a resetting operation, means including a clutch associated with said resetting means to disconnect said shaft from said driving means upon initiation of a resetting operation, but prior to the establishment of a driving connection between said shaft and said mutilated gear, and means for actuating said clutch after said shaft is released from driving connection with said mutilated gear to reestablish the connection between said shaft and said driving means.

4. The combination with a counter and a shaft operable to drive said counter to perform counting and resetting operations; of driving means including a gear for actuating said shaft to perform a counting operation, resetting means including a mutilated gear adapted to mesh with said gear to actuate said shaft to perform a resetting operation, means associated with said resetting means to disconnect said gear from said driving means upon initiation of a resetting operation, but prior to meshing engagement by said mutilated gear, and means operative after disengagement of said gear by said mutilated gear to reestablish the connection between said ear and said driving means.

5. The combination of a counter, a drive shaft, means for connecting said drive shaft to said counter to perform a counting operation, means for resetting said counter to zero position, said connecting means comprising a member fixed to said drive shaft, a clutching member threadably mounted on said shaft for rotary movement relative to said shaft in directions toward and away from said fixed member and an element rotatably mounted on said shaft between said members, said element being operatively connected to said counter to transmit movement thereto when gripped by action of said clutch member, and means associated with said resetting means for moving said clutch member to clutch releasing position upon initiation of a resetting operation and to clutching position upon termination of the resetting operation.

6. The combination of a counter, a drive shaft, means for connecting said drive shaft to said counter to perform a counting operation, means for resetting said counter to zero position, said connecting means comprising a member fixed to said drive shaft, a .clutch member threadably mounted on said shaft for rotary movement relative to said shaft in directions toward and away from said fixed member and an element rotatably mounted on said shaft between said members, said element being operatively connected to said counter to transmit movement thereto When gripped by action of said clutch member, means operative to bias said clutch member into clutching engagement with said element, and means including pawl and ratchet means associated with said resetting means to retract said clutch member upon initiation of a resetting operation and to release said clutch member for clutching engagement upon termination of the resetting operation.

7. A device comprising a pair of counters arranged in parallel spaced relation, each of said counters being provided with a spur gear and a bevel gear, a shaft disposed at right angles to the axes of said counters and carrying bevel gears adapted to mesh with the bevel gears of said counters to thereby transmit movement from one counter to the other, driving means operatively connected to the spur gear of one of said counters, resetting means including a mutilated ear adapted to mesh with the spur gear of the other of said counters, and means operative upon the initiation of a resetting operation and before meshing engagement of said mutilated gear to disconnect the driving means from the spur gear of said one counter.

8. A device comprising a pair of counters arranged in parallel spaced relation, each of said counters being provided with a spur gear and a bevel gear, a shaft disposed at right angles to the axes of said counters and carrying bevel gears adapted to mesh with the bevel gears of said counters to thereby transmit movement from one counter to the other, driving means including a driving gear in mesh with the spur gear of one of said counters and a disconnectible connection for said driving gear,:resetting means including a mutilated gear adapted to mesh with the spur gear of the other of said counters, and a pair of devices, one of said devices being operative to hold said driving means against movement during resetting and the other of said devices being operative to disconnect the driving gear from said driving means prior to the driving engagement by said mutilated gear and to reestablish the connection between the driving gear and said driving means after the disengagement by said mutilated ear.

9. In a counting device, the combination of a reset shaft, a disc driven by said shaft, a shoulder on said disc, a zero stop pawl engageable by the shoulder to stop said shaft at the end of a resetting movement, said disc having a surface adapted to force the pawl radially thereof during movement of the disc preparatory to a resetting movement, a latch adapted to engage and retain said pawl when it is moved radially so that the pawl will clear said shoulder during initiation of 3a resetting movement, and an element carried disc can'ied by said shaft, a zero stop pawl enlatch torelease said pawl prior to the end of a by said disc to trip said latch and thereby free said pawl prior to the end of the resetting move- 'ment preparatory to'eng agement by said shoulder.

10. In a'counting device, the combination of a reset shaft adapted to perform a resetting operation during a single rotation thereof, a notched resetting movement, the disc having a surface adapted to dislodge from said notch the zero stop pawl by a pullback rotation of said shaft, and said element being operable during a pullback movement to urge said latch into pawl retaining engagement.

KENLY C. BUGG.

Images