US2286887A - Total taking mechanism - Google Patents

Description

" n. mm-1.012"

TOTAL TAKING lomlsf Jgm 1s, 194.2." fil` 2 Smeets-Sheet 1 Filed aan. 1s. 19:59V

JHM 16,1942 R, ANscHUTz 2,285,887

roux. wcm@ uxcmrs Filed Jan. 16, 1939 Z'Shutl-Shut 2 Patented June 16, 1942 TOTAL TAKING MECHANISM Robert Anschtz, Zella-Mehlis, Germany, assignor to Mercedes Buromaschinen-Werke Aktiengesellschaft, Zella-Mehlis, Thuringia, Germany Application January 16, 1939, Serial No. 251,257 In Germany February 12, 1938 4 Claims.

This invention relates to a total taking control means under control of the totalizer to select and actuate the type bars to print the amountstanding in the totalizer and, in which the selector for the types to be printed is a cam shaft mounted to rotate in xed bearings, andthe operation of the types is controlled by setting members in a swinging frame operated by the driving member of the total taking control means.

The well known mechanism in this manner are improved according to the present invention oy arranging intermediate members in the drive of the swinging frame, which intermediate members are operated by the driving member of the total taking mechanism. By these means, the construction of the mechanism, and particularly the coupling of the swinging frame with the driving member for the total taking control means, is much simplified.

In the drawings one form of construction accordingto the invention is illustrated by way of example as applied to a machine as described in patent application No. 146,897.

In the drawings:

Fig. 1 is an elevation, partly broken open, of

a typewriting-calculating machine equipped with the invention, viewed from the left.

Fig. 2 is a perspective illustration showing several parts of the mechanism, viewed from the front and the left of the machine.

Fig. 3 is a detail.

The parts which are operated when total taking Referring now to the drawings, and first to Fig. 1, a total taking key 2 is arranged in a bearing frame I of the machine.

The key bar 3 of the total taking key 2, as best seen in Fig. 2, is mounted to swing on a bar 4 secured in the bearing frame i'. A spring 5 holds an abutment 33 on the key bar 3 against the inner side of a locking bar 6 which is also secured in the bearing frame l, defining the normal position of the key bar. A locking pawl 8 ismo'unted to swing about a screw 1 on the key bar 3 and a spring 5 holds a tooth |0 on the pawl against the outer side of the locking bar 6,

When the total taking key 2 is depressed, its key bar 3 turns clockwise and the tail end I2 of the bar raises a slide i3 which, operates a zero setting stop for the zero setting wheels in a co1- umn totalizer as described and illustrated in patent application Serial Number 146,897. At the same time, the tooth I0 of the pawl 8 engages in a groove 4 in the locking bar 6 holding the total taking key 2 depressed. The tail end |5 of the pawl moves into active position with respect to an unlocking slide i6.

On a rotating shaft 25, of square cross-section with rounded edges are arranged a pair of cam plates 20 and 2|. These cam plates 2|, 22 are free to turn on said shaft 25. The cam plates 20, 2| and other parts, have been shown at some distance from each other in Fig. 2, for the sake of clearness. Rivets I8 extend through slots I9 in the'two cam plates 20, 2| and their free ends support a clutching member |1 on which a slot 21 for their reception is arranged. A compression spring 22 is inserted in the slot 21 between a pin 28 in the cam plate 2|, and the rivet |8 which is at the right. The spring holds the free end of the member |1 against the tail end l2 of the key bar 3 with a face 23 and in this position l a hook 24 of the member |1 is clear of the teeth of a pinion 26 which is held against rotation on the shaft 25. In this position, the cam plates 20, 2| are arrested while the shaft 25 rotates freely.

The cam plates 20, 2| are rigidly connected to each other and by the torque the reaction of the spring 22 exertsfr on the pin 28, the cams 20, 2| are turned anti-clockwise together, and a roller 29 on the cam plate 20 is forced against the edge 30, Fig. 1, of a locking lever 3|, defining the normal position of the cams. The locking lever 3|, as shown in Fig. 2, has a boss 32 on the bar 4 and a spring 33 holds the front end of the lever against the upper side 34 of the locking bar 6.

Mounted to swing on the boss 32 of the locking lever 3| is a camplate lever 31 with its boss whose ends 35 and 3B project beyond the sides of the camplate lever, holding it against lateral displacement on the bar 4 between the key bar 3 of the total taking key 2, and the locking lever 3|. A spring 39 connects a crooked lug 38 at the upper end of the camplate lever 31 to a pin 40 in the key bar 3. This spring turns the lever 31 clockwise and holds a roller 4| on a rivet 42 at the lower end of the camplate lever 31, or its arm 43 against the cam plate 20. The lug 38 has an inclined edge 45 for cooperation with the front end 46 0f a push rod. The camplate lever 31 and the push rod are not in operative connection, the push rod being elevated beyond the upper end of the lug 38.

The push rod consists of two parts 41 and 48 which are connected by screws 49 in elongated holes 50, and the rear part 48 is slotted at 5| and guided between sleeves 53 and 54 on a stud 52 in the left-hand frame plate of the machine. The rear end 13 0f the part 48 is crooked to the left and curved at'14. This curved portion engages the, also curved, front edge of an arm 16, and plates 11 on the arm hold the parts against lateral displacement. The boss 18 is secured on a shaft 19 and the'fshaft is held between the pointed ends of screws, not shown, in the right and left-hand side plates of the machine. A spring 82 which is attached to the arm 16 at its rear, and to a pin 83 in the left-hand side wall of the bearing frame I at its front end, holds the edge 15 of the arm 16 engaged with the rear portion 14 of the part 48.y

The front part 41 of the rod slides in a slot 55 in a downwardly directed rib 56 of a comb 51 for guiding the actuating slides. The comb 51 is supported by a bracket 58 for the roller lock of the key bars in a typewriting keyboard 59 of the machine, which is secured in the frame of the machine by aba 60. A spring-eye 6I is inserted in the bar and supports one end of a spring 62 whose other end is attached to a pin 63 in the push rod part 41. The p ull of the spring in the direction of the arrow 64, forces the rear end of the slot 5I against the stud 52and the upper edge 65 of the push rod against the upper end A66 of the slot 55, defining the normal position of the push rod.

An unlocking slide 68 slides in another slot 51 in the comb 51 and springs 10, Fig. 1, hold a roller 69 at the lower end of the slide against the cam plate 2|. A pin 1I moves through a hole 12 in the comb 51 when the unlocking slide 68 descends, and engages the upper edge of the push rod.

Secured on the shaft 80 carrying the arm 16 are the bosses 84 and 85 of a pair of forks 86 and 81 arranged whose openings 88 and 89 engage a stay 90 in a swinging frame comprising a side member 9| at the left which is pivoted about the stud 52, a.side member 93 at the right which is pivoted about a stud 94 in the right-hand side plate of the machine, and another stay 92. The forks 86 and 61 are arranged within the frame near the ends of the stay 92.

The parts which have just been described, from the camplate lever 31 to the forks 86, 81 make up the intermediate members referred to in the introduction.

Setting members in the shape of ten bellcranks 95 only one 0f which is shown in Fig' 2, are mounted to swing on the stay '92 in 'the swinging frame, and spaced by sleeves 96. The shorter arms 99 of the bellcranks 95 are under the e011-, trol of ten cams 98, Fig. 1, which are arranged helically on a cam shaft 91. Two more cams 98 have been shown in Fig. l which are provided for the duodecimal calculations required by the British system.

A link IOI is mounted to swing about a screw near the upper end of each bellcrank 95 and is adjusted by a set screw |02 and an arcuate slot |03. Connecting rods |04 extend from the links IOI to the lower arms |05 of intermediate levers |06, Fig. 1. The intermediate levers which are mounted to swing about a shaft |01, throw type levers |08 against the platen I I 0 on the carriage II5 when turned clockwise.

The operation of the mechanism when total taking i As described, the key bar 3 of the total taking key 2 is turned clockwise on the bar 4 when the key 2 is depressed, and the pawl 8 moves with the key bar. Its tooth I0 engages in the groove I4 in the locking bar 6 and holds the key bar 3 depressed. The tail end I2 of the key bar 3 clears the face 23 of lthe clutching member I1 whose tooth 24 is now forced in between the teeth of the pinion 26, so that now the cams 20 and 2| rotate-clockwise-with the shaft 25. At the beginning of a revolution, the unlocking slide 68 is allowed to descend under the action of its springs 10 by the cam 2|, and its pin 1I, descending through the hole 12 in the comb 51, bears against the upper edge 65 of the push rod and swings it clockwise about the stud 52 against its spring 62, placing the front end 46 of the rod in active position with respect to the incline at the upper end of the camplate lever 31.. While this occurs, the concentric portion of the cam plate' 20 moves idly past the roller 4I at the lower end of the cam pla-te lever. The cam 2| is so shaped that upon further rotation of the cam plates the unlocking slide 68 at first remains in the position shown in Fig. 3, and the operative connection 45, 46 remains. Then the ascending portion III of the cam plate 20 swings the lever 31 anticlockwise about the boss 32 of the locking lever 3| against its spring 39. The incline 45 of the lever now pushes back the push rod in the direction of the arrow II2 against the spring 62 for about the length of its slot 5|. The arm 16 and its shaft 80 are turned in the direction I I2 against the spring 82. The edges I I4 and I|5 of the forks 86 and 81 engage below the stay 90 and turn the swinging frame clockwise about its pivots 52 and 94;k

While this occurs, the zero setting operation is performed in the column totalizer and the cam shaft 91 is turned clockwise to present a cam 98, for instance, that for the number 5, to the arm 99 of the bellcrank 95.

When the swinging frame is turned clockwise, the bellcranks on the stay 92 are raised and the arm 99 of the corresponding bellcrank engages below the cam 98 of the value 5. The bellcrank turns anti-clockwise on the stay 92 and its link IOI pulls the connecting rod |04 to the rear in the direction of the arrow |I2, Fig. 2. The

Acorresponding intermediate lever |06 is swung clockwise about the shaft |01, and the type lever |08 of the value 5 is thrown against the platen I0.

Upon further rotation of the shaft 25, the elevated portion of the cam 20 allows the springs 39 and 62 to return the cam plate lever 31 and the push rod into the intermediate positions shown in Fig. 3, and the pull of the spring 82 returns the lever 16 and the sha-ft 80 on which it is mounted, into initial position. The forks 86 and 81 now return the swinging frame into its initial position, and the elevated portion of the cam plate 2| Araises the unlocking slide 68 its pin clearing the upper edge 65 of the push rod and allowing the spring'62 to return the push rod into its inactive position in which the drive 45,

completed their revolution, the face 23 of the.

clutching member I1 is arrested by the tail end I2 Yof the key bar 3 and moves its tooth 24 clear of the teeth of the pinion 26. The cam shaft 91 also returns into its initial position, and all parts are now ready for another operation in the position illustrated in Fig. 1.

'I'he object of so arranging the driving connection between the cam plate lever 31 and the end 46 of the push rod that it is normally interrupted, is as follows: i

If the operator by inadvertence depresses the total taking key 2 in any position of the paper carriage in which none of the column totalizers is in active position, the unlocking slide 6B cannot descend as it is, arrested by locking means H6, as illustrated in the Patent 1,862,240 for the slide I6. All the same, depression of the total taking key 2 starts the cam plates 20, 2| which operate the cam plate lever 32'- but its edge 45 cannot act on the end 46 of the push rod. there were a permanent would be typed upon depression of the key 2 since in the normal position, Fig. l, the 0 cam 98 is in active position to the arm 99 of the corresponding belllcrank 95. The clutching-in of the cam plates 20, 2| by unintentional operation of the key 2 is broken by hand by which the slide I6 is moved down.

It should be noted that the expression total taking" as used in the specification and the claims, includes any kind of total taking, for instance, subtotal taking.

Having now particularly described and ascer tained the nature of our said invention and in what manner the same is to be performed, we declare that what we claim is:

1. In a combined typewriter and calculating machine, a power driven clutch, a total key for controlling the engagement and disengagement of said power driven clutch, a double drive cam operable by said power driven clutch, type levers,

selecting means for determining the type lever to be operated during total taking operation, crank levers cooperating with said selecting means, in combination, connecting members rigidly connecting said type levers with said crank levers, a swinging frame for said crank levers, rocking members for rocking said swinging frame, said rocking members being operable by one part of said double drive cam and being connected with said swinging frame at remotely spaced points thereof to impart equal rocking forces to the opposite extremities of said swinging frame.

2. In a combined typewriter and calculating If connection, the numberl machine, a power driven. clutch, a total key for controlling the engagement and disengagement of said power driven clutch, a two part double drive cam operable by said power driven clutch, an unlocking slide for total taking rendered operative by one part of said double drive cam, type levers, selecting means for determining the type lever to be operated during total taking opera- 3 tion, crank levers cooperating with said selecting means, in combination, connecting members rigidly connecting said type levers with` said crank levers, a swinging frame for said crank levers, a rock-shaft, rocking members rigidly mounted on said rock-shaft for rocking said swinging frame, a spring urged member on said rock-shaft, controlling means for said rock shaft including a two part push rod interposed between said clutch and said spring urged member, and a rocking lever, said push rod being adapted to be brought into driving connection in relation to said rocking lever by said unlocking slide for producinga -driving connection between said swinging frame and the other part of said double drive cam.

3. In a combined typewriter and calculating machine, a power driven clutch, a total key for controlling the engagement and disengagement of said power driven clutch, a double drive cam operable by said power driven clutch, type levers, selecting means for determining the type lever to be operated during total taking operation, crank levers cooperating lwith said selecting means in combination, a swinging frame for said crank levers, rocking members for rocking said swinging frame, said rocking members being operable by one part of said double drive cam, a spring urged member, a rock-shaft common to said r'oeking members and said spring urged member, a two part push rod interposed between said clutch and Ysaid spring urged member, and guide plates on said spring urged member to secure one part of said push rod in lateral position.

4. In a combined typewriter and calculating machine, a power driven clutch, a total key for controlling the engagement and disengagement of said power driven clutch, a double drive cam operable by said power driven clutch, type levers,

selecting means for determining the type lever to be operated during total taking operation, crank levers cooperating with said selecting means, in combination, a swinging frame for said crank levers, rocking members for rocking said swinging frame, said rocking members being operable by one part of said double drive cam, a spring urged member including a curved part, a rock-shaft common to said rocking member and said spring urged member, a two part push md interposed between said clutch and said spring urged member, a rounded face on said push.rod coacting with the curved part of said spring urged member. v

ROBERT ANscH'IZ.

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