US1524365A - Bobation oe new yoke - Google Patents

Description

Jan. 27. 1925. 1,524,365

L. C. MYERS ET AL FULL STROKE MECHANISM Original Filed July 12, 1923 3 sheets sheet 1 Jan. 27. 1925.

L. C. MYERS ET AL FULL STROKE MECHANISM Original Filed July 12, 1923 3 sheets sheet L. C. MYERS ET AL FULL STROKE MECHANISM 3 Sheets-Sheet m NN uwm H a m .w MN a WW NWA/ m y Q J O w n Jr m V. N\ H. m. -mm 1 m a Q N$/ n1 m unwu w l u w Qwl mm. i m A r %W H N.

Patented den. 27, W25.

LEWIS o. m nns, or rannroiar, AND

earner ni ric GEO'RGE F. HANDLEY, F GLENDALE, NEW YORK,

ASSIGNORS '10 ROYAL TYPE-WRITER COME'ANY, INCL, OF NEW YORK, N. Y., A COR- POR-ATION 0]? NEW YORK.

FULL-$TROKE MECHANISM.

Drlglnal application filed July 12, 1923, Serial No. 651,073. Divided and this application filed April 21, 1924:. Serial No. 707,894.

To all whom it may concern:

Be it known that we, Lnwrs C. MYERS, a citizen of the United States, and resident of Freeport, in the county of Nassau and State of New York, and GEORGE F. HAND- LEY, a citizen of the United States, and resident of Glendale, in the county of Queens and State of New York, have invented certain new and useful Improvements in Full-Stroke Mechanism, of which the following is a specification.

This application is a division of our application Serial No. 651,073, filedJuly 12, 1923.

An object of the invention is to provide a full stroke mechanism which will prevent the depressed key from returning to normal position before it has been fully depressed.

Another object of the invention is to provide such a mechanism which will prevent the depressed key from being operated a second time until it has fully returned to normal position.

Another object is to provlde full stroke mechanism of such character for keys which print certain specific characters and are also connected to counters which register the number of times that each key has been depressed.

lin the parent application the invention has been illustrated in connection with a particular type of typewriting machine, but the invention covered by this divisional application is not limited to a typewriting machine. It may be employed in computing machines, cash registers, and in general, in any type of machine where the operation of a key performs such functions that it is necessary for it to be completely operated before returning to normal position, and to completely return to normal position before being operated a second time.

As herein described a typewriting ma chine is provided with two keys, one for printing .05 and the other for printing .10, and each of these keys is connected to an individual register for counting the number of times the particular key is depressed. As is well known, the printing operation might be erformed without a complete depression oi the key, while the register is onl operated when the key is fully depressed? Furthermore, the key might be operated a second time to print without awaiting a full return to normal position, but such return is necessary to a correct operation of the register. Therefore the full stroke mechanism is of great value in connection with such keys.

In the drawings Figure 1 is a top plan view of a portion of a typewriting machine, showing the special keys, the registers, and their general relation to the remainder of the machine.

Figure 2 is a side elevation with parts in section of the operating means for the counters and the full stroke mechanism.

Figure 3 is a front elevation with parts in section of the full stroke mechanism at the right hand side of the machine and the connection from the key lever to the counter.

Figure 4 is a detail view showing the connections from the keys to the counters.

Figure 5 is a View of the counter at the left hand side of the machine with the connection for operating the same.

Figure 6 is a front view of a portion of the full stroke mechanism.

Figure 7 is a side View with parts in section of the full stroke mechanism with one of the keys fully depressed.

Figure 8 is a similar view with the parts at the beginning of the upstroke of the key.

Figure 9 is a rear view of the front stroke mechanism with the levers in section.

Figure 10 is a horizontal section through the front stroke mechanism.

Figure 11 is a horizontal section through the guide member shown in Figure 6 when attached to the frame.

The invention is illustrated as embodied in a machine having a main frame A, key levers B, type bars D, connections C between the type bars and key levers, top plate E and platen F. These parts may be of any desired character and are not illustrated nor described in detail.

Two special key levers B and B are provided, the first actuated by a finger key 1 and connected to a register or counter 2 which will count the number of times the key lever has been depressed, and the latter actuated by a finger key 3 and connected to a similar counter 4. In the embodiment here shown, the key lever B is connected to a ty )0. bar which prints .10 while the key lever 2 is connected to a type bar which prints .05. So far as certain features of the invention are concerned, it is entirely immaterial what characters are printed by the operation of the respective keys, or whether they operate a printing mechanism or some other instrumentality.

These counters may be of any old or de sired type. The counter 2 is supported by a bracket 5 which has an ear connected by a screw 6 to a comb plate G which extends across the front of the machine. Thenumerals 7 may be read through an opening 8 in the top plate of the machine. A finger piece 9 on the shaft 10 of the counter 2 1S used for resetting the same, and this shaft has an arm 11 connected by a link 12 to the key lever B.

At the left hand side of the machine a counter 4 is supported by a bracket 14which has an ear connected by a screw 15 to the comb plate G, and the numerals 16 may be read through an opening 17 in the top plate of the machine. A finger piece 18 on the shaft 19 of this counter is used to reset the same, and the shaft has fastened to it an arm 20 to which is attached a link 21. The brackets 5 and 14 each have depending arms 22 in which is mounted a shaft 23 which extends across the machine. The link 21 is connected to an arm 24 carried by a collar 25 on this shaft. Near the right hand of the machine the shaft 23 is provided with a collar 26 having an arm 27 which is connected by a link 28 to the key lever B It is therefore evident that whenever one of the keys 1' or 3 is depressed, the appropriate numeral will be printed and simultaneously the counter will be operated, so that the number of depressions of each key will be registered.

Since the levers B and B not only operate the type action to print but also operate the counting mechanism, it is very important that the levers be depressed to their full extent before beginning the return movement, and also that they may not be depressed a second time before they have returned fully to normal position. We have, therefore, provided simple but efiicient full- StliOlIG mechanism which will attain this resu t.

A bracket member 29 of the form clearly shown in Figure 6 is attached by screws 30 which pass through holes 31 therein to the front comb plate 32. This bracket has two ears 33 near its lower end which are provided with slots 34. Near the top two ears 35 are provided with teeth 36, which face the front and project downwardly. About in its middle-portion, the bracket has rearwardly extending ears 37 in which is mounted a pivot pin 38 on which turns a frame comprising side arms 39 which are spaced by collars 40 from the ears 37. A spring 41 coiled around the pin 38 may bear at one end against a side arm 39 and at the other against a frame member H which is provided with a buffer I for the return movement of the key levers. The arms 39 are connected at their upper ends by a cross bar or rod 42 and each arm has teeth 43 on its front edge which extend upwardly.

To each key lever is pivoted a lever 44 on a pivot 45. These levers extend upwardly and are guided in-the slots 34 of the bracket 29. At the upper end each lever 44 has a tooth 46 that is bent inward at an angle to the plane of the lever and is in a position to cooperate with the adjacent ratchet teeth 36. Near the upper end each lever 44 also has a tooth 47 extending rearwardly in the lane of the lever and cooperating when the l zey is depressed with the teeth 43- on the arm 39. Each lever 44 also has a lug 48 somewhat below ,its upper end which contacts with the comb guide 32 to limit the rearward movement of the lever. At the lower end of the lever is connected a spring 49 which extends forwardly and is attached to the key lever at 50.

When the key B for example is de ressed, the tooth 46 asses down in front of t e teeth 36 and is he (1 in contact with them by the spring 49, which rocks the lever 44 on its pivot 45. The key lever cannot, therefore, move upward on account of the engagement of the tooth 46 with the teeth 36. As soon as the lever has been fully depressed, the tooth 46 passes beneath the lowermost tooth 36 and springs rearwardly into the position of Figure 7 in which the key lever is fully depressed. As soon as the upward movement begins, the tooth 47 passes over the teeth 43 and after it has pamed one of these teeth as shown in Figure 8, it cannot be depressed until it has moved all of the way up to normal position. The forward movement of the arms 39 is limited by the engagement of the heel portion 39' with the comb plate, but durin the upward movement of the lever 44 t e frame formed of the side arms 39 will be cammed rearwardly against the tension of the spring 41 as shown in Figure 8. When the key lever returns to normal position the tooth 47 engages the upper portion of the side arms 39 and is moved to normal position as in Figure 2.

This full stroke mechanism, therefore, prevents the return of a depressed ke to normal position before it has been lly depressed, and also revents a second depression ofthe key efore it has returned entirely to normal position.

It is obvious that the invention is not limited to any specific t pe of machine, and that modifications an changes may be madetherein without departing from the to, a series of ratchet teeth on each of said brackets, and a lever pivoted to the key lever and having teeth cooperating with said ratchet teeth.

2. A full stroke mechanism for a key lever comprising a bracket attached to the machine frame, a second bracket pivoted thereto, a series of ratchet teeth on each of said brackets, one series facing downwardly and the other upwardly, and a spring drawn lever pivoted to the key lever and having separate teeth to cooperate with the two series of ratchetteeth.

3. A full stroke mechanism for a key lever comprising a bracket attached to the machine frame, a second bracket movably carried thereb teeth on each of said brackets, and a mem er movably connected to the key lever and cooperating successively With the teeth on the brackets to prevent movement in either direction until the normal movement in the other direction has been com pleted.

4:. A full stroke mechanism for a key lever comprising a fixed set of teeth and a movable set of teeth each carried by the machine frame, and a movable member carried by the key lever and having a separate tooth to cooperate with each of said sets.

5. A full stroke mechanism for a key lever comprising a fixed set of teeth and a movable set of teeth each carried by the machine frame, a movable member carried by the key lever, a tooth projecting therefrom in one plane to cooperate with the fixed set of teethand a tooth projecting therefrom in another plane to cooperate With the movable set of teeth.

In testimony whereof, We have hereunto subscribed our names.

LEWIS C. MYERS. GEORGE F. HANDLEY.

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