US1007098A - Tabulating mechanism for type-writers. - Google Patents

Description

J. B. HAMMOND. TABULATING MECHANISM FOR TYPE WRITERS. APPLICATION FILED MAY a1. 1906. RENEWED MAR.3,1911. 1,007,098.

Patented 001;. 31, 1911.

2 SHEETSSHEET 1.

6 8 556116 5 Z 7 55X a J &7 4 5 v J. B. HAMMOND.

TABULATING MECHANISM FOR TYPE WRITERS.

APPLICATION FILED MAY 31, 1906. RENEWED-MAR. 3, 1911. 1,007,09 Patented ott. 31, 1911.

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; li wezzrl ttW/M M NITED STATES PATENT OFFICE.

JAMES B. HAMMOND, NEW YORK, N. Y.

TABULA'lING MECHANISM FOR TYPE-WRITERS.

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Specification of Letters Patent.

Patented Oct. 31, 1911.

Application filed May 31, 1906, Serial No. 319,626. Renewed March 3, 1911. Serial No. 612,101.

To all whom it may concern:

Be it known that I, JAMES B. HAMMOND, (HD7611 of the United States, residing at New York, N. Y., have invented certain new and useful Improvements in Tabulating Mechanism for Type-lVriters, of which the following is a specification.

; My invention is an improvement in tabulatingmechanism, particularly adapted for use in connection with the Hammond typewriter. It is characterized by the fact that a tabulator stop lever is set in diiferent positions according to the tabulating key which is operated, said stop lever having a series of shoulders or stops arranged to arrest the backward throw of the hammer lever after different degrees of movement according-to'the denomination of the tabulating key which is struck, the degree of said backward, movement, of course, determining the number of tooth spaces the escapement wheel must move forward before the hammer lever returns to normal position and consequently the number of letter spaces which the carriage will feed forward. It will be understood that the carriage is brought to the desired columnar ;position and then by striking the key of the proper denomination the carriage is set .in precise position for printing the number of the desired denomination.

In the drawings, Figure 1 is a plan view of the machine with parts omitted. Fig. 2 is a rear view of the escapement mechanism. Fig. 3 is a detail view of a marginal stop. Fig. 4 is a side view, with parts omitted. Fig. 5 is a front view of the bank of tabulator keysw Figs. '6 and 7 are detail views respectively of line lock and marginal stops.

The carriage rack is indicated partly in full lines and partly in dot-ted lines at 11. It meshes with the gear 2 of the spring drum 3 and with the gear 4 on the shaft of the escap'ement wheel 5. This escape ment wheel is of the usual form and arrangement known in this style of machine and is controlled in the usual manner by a detent 6 engaging therewith and alsothe detent 7. The latter detent is on a lever 8 connectedwith the keys in the WGllnkIlOWIl manner. and they detent or pawl 6 is carried by a lever 9 freely pivoted upon the shaft tofhave a limited amount of movement circumferentially of the escapement ratchet so as to produce the uniform minimum letter spacing. By my present tabulator arrangement I design ,to control the movement of this hammer lever so that the escapement movement of the ratchet wheel 5 may be equal to a distance of one or a larger number of letter spaces according to the denomination of the operated tabulator key. The

detent or pawl 6 is controlled as to its position in relation to the ratchet wheel by a slotted arm 10 connected with the trip or detent lever 8, and having a slot 11 receiving a pin 12 from the pawl 6. The slotis curved concentrically to the axis of the escapemcnt ratchet. In order to vary the retracting movement of the hammer lever 9 with the pawl 6, in order to provide for the variable spacing movement necessary in tabulating, I employ a swinging arm 19. pivoted to the frame at 13 and having a series of stop shoulders 14 adapted severally to arrest the backward movement of the hammer lever 9, which lever as shown in Fig. 2 is provided with an upward extension 15-, the rear edge of which at 15' is adapted to strike the shoulder ofthe arm 12, which may at that time be in the path of movement of the said edge 15. This swinging arm is set in its different positions for securing the variable spacing movement for tabulating by means of connections leading to tabulating keys arranged in a bank at A, the keys of said bank being numbered.

1, 2, 3, i, 5 and 6 and representing respecw tively the denominations hundred-thousandt-hs, ten-thousandths, thousandths, hundredths, tenths and units. These keys are arranged in a bracket 16 and they are pressed upward by springs 17 Their stems overlie arms 17 projecting from a rockshaft 18 which is connected by an arm 19 and a link 20 with the swinging stop-arm 19. above mentioned. The stems of the'keys are arranged at different heights in relation tothe arms 17 so that different degrees of-lost motion will result from the depres-- sion of the keys and thus the swinging arm 12 Wlll be set in a different position, when,

theposition assumed by. itwhen the key 6 is pressed, and this will cause difierent stop shoulders on the arm -12to be brought into;

-for instance, the key-No. 1 is pressed from- It will he unijlerstood that the hammer for making the impression is of substantially the same form as is well known in the llammond construction, the arm carrying said hammer being indicated at 2st and this hammer is connectetfl with the luu'umer lever 9, said connection being a loose one and consisting simply of the pin 22 on the hammer arm extending beneath the hammer lever 9.

The tabulacing keys not only serve to' set the stop arm 12 in position to arrest the retracting movement of the hammer lever, but I have also utilized these tabulating keys to ope ate the trip frame and the escapement mechanism so that when a talmlating key is operated not only vill the variable stop 12 be set in posi' ion. but the escapement mechanism will also be operated and the carriage will thcret'ort move the predetermined nnnr ber of letter soaees according to the denomination of tho tabulator key which is depressed For this purpose a universal bar or plate 23 extends between the stems of the tabulating ke s, the said stems 1a col" lars Q-t overlying this tlJllYiL, at bar or plate so that when either one of the tabulatingkeys is depressed the universal bar will also be depressed. it is cari'ied hy a stem 25 and pressed nor nally upwardly by a spring 26. The stem of the universal plate or bar overlies the upper bent end 27 of an arm 28 which is contorted to a rock-shaft 29 journaled in the frame, the said shaft carrying an arm 30 extending beneath a lever or arm 31 pivotally sup iiorted on the worm shaft 32, the latter element being a well known part of the machine. 'rhis arm or lever 81 extends beneath the universal trip frame 33 and also beneath the tail. piece 3% of the hammer detent or hook The trip arm 33 is of the usual form and arrangement well known in this type of machine and the same true of the hammer arrestinghook 85. The trip frame 33 extends over the rear ends of the kcymleves, only a few of which are illustrated in toe drawing, for instance at 36, 37 and 38. These key levers are 'fuh crunied as in the ordinary Hammond typewriter, at a point intermediate their length for instance at the point a". When either of the key ltW' "us is: operated the trip tralne raised at its front end thus depressing its rear arm 33 wh'ch bearing down on the forwardly bent end of the lever 15 operates through the slot ed arm l0 on said lever S to release the hammer lever ll and hammer from the escapcment ratchet 5. The sami action takes place when the said trip frame operated through the connections just described, lauling from the universal bar of the hank ot' tabulatm: keys. In the latter case however, the han'nner lever l) is allowed to retract a greater or lesser distance circumterentially of the ratchet wheel 5, according to which oi the tabulator keys 1s operated and this determines the number of letter spaces which the ratchet wheel 5, and consequently the carriage will be allowed to move on the release of the key. In tabulating the carriage is brought to the predeten mined columnar position and then the appropriate'tabulator key is depressed to set the carriage in the proper position in relation to said column for printing the number of the denomination required or to print the letter or word in the desired position in re lation to said columnar position.

It will be seen from the above that when a tabulator key is operated the stop arm 12 is set in position to limit the retracting movement of the hammer lever and at the same time through the connections to the trip frame 33 the lever S is moved, causing the slotted arm 10 to throw the pawl 6 from the escapement wheel and the hammer then ti ing for aid moves the hammer lever in the direction of the arrow at; so that the detent U will get into position to reengage the escapemcnt or ratchet F to be carried forward thereby in the direction of the arrow 3/ until the arm 15 of said hammer lever strikes the fixed stop 3%) in the ordinary manner. The tor-ward movement of the ratchet wheel 5 in the direction of the arrow y determines the number of letter spaces which the carriage moves at each escapement action and of course the farther the pawl 6 is allowed to retract eireumterentially in relation to the escapement wheel in the direction of the arrow a; before recngaging with the said wheel the greater number of letter spaces the car riage will move when the pawl 6 together with the hammer lever moves in the arrow direction y, and as above stated the amount of the retracting movement of the hammer lever depends upon the position of the stop arm 12.

When the pawl 6 is thrown out of engagement with the eseapement wheel in order to allow the hammer to go for *ard and the hammer lever to be set for a new escapement action the detent 7 is thrown into engagen'ient so that upon the return of the detent lever 8 to its normal position with the detent 7 out of engagement with the escape ment wheel the pawl (5 will be thrown into engagement and thetension on the escape ment wheel from the carriage spring will cause the escapement wheel to turn in the direction of thearrow 1 until the hammer lever strikes the fixed stop 39 it being un-' derstood that the pawl 6 on the forward movement of the ratchet or escapeinent Wheel in the direction g has been in engagement with the said escapement wheel, The move ment of the escapement wheel in the direction-g/ will depend upon the distance the hammer lever 9 moved in the direction to from. The connection between the hammer and thehammer lever is a loose one so that the hammer lever will be impelled by momentum in the arrow direction as when the pawl 6 is released and thus it is only necessary to provide means for arresting the movement of the detent or hammer lever 9 in the arrow direction as at different positions in order to secure the variable spacing action for tabulator work. For instance if the hammer lever moves in the direction a distance equal to one tooth of .the spacing wheel the ordinary spacing will be performed, but if the said lever is moved distances equal to 2, spaces the letter spacing movement of the carriage will correspond thereto but it will be. .seen from the above that the amount of movement in the direction a of the lever 9 will depend upon which stop shoulder of the arm 12 is in line with the arm 15 of the hammer lever.

The curved formation of the slot 11 plays an important part in the variable action of the spacing mechanism as it permits the pawl (3 to assume different circumferential positions in relation to the escapement wheel while maintaining the end of the pawl 6 close to the periphery of the said wheel so that its disengaging and engaging action is substantially similar for all different positions that the detent may assume circumferentiaily of the said escapement wheel. lVhen a tabulator key is operated the arm 31 operates the hammer hook 34 so as to arrest the hammer from striking a blow. This hook is also operated when the space key is operated, but this is a feature long known in the Hammond machine.

I have provided a line lock consisting of a lever 40 pivoted to the frame at 41 and having a pin and slot connection 42 with an arm 43, the end of which lies within the path of the finger 44 on a stop 45, mounted adjustably on a rack bar 40 secured to the carriage head at 47. The stop 45 has a finger 48 adapted to engage the teeth of the bar 46 and it is provided with a spring 49 resting on the bar 46 which normally holds the stop 'up with the finger 48 engaging the said teeth. To adjust the stop along the bar 46 pressure is applied to depress it thus disengaging the tooth 48 from the teeth of the bar 46, then the stop may be shifted along the bar and released so that its spring will force the tooth 4S upwardly to engage the proper tooth of the bar. The finger 44, as the carriage moves toward the left, will strike against the lever 43 andthrough the pin sndslot connection the end of the lever 40 will be moved over the trip frame 33 to prevent the operation of the same with the keys, thus locking the machine against operation according t the point at which the line lock stop 45 is located on the bar 46. A 35 spring at 50 returns the lever 40 and the 3 or more escapement' arm 43 to normal position when the carriage is shifted to the right.

I also ,provide a. marginal stop 51 adjustably mountedon the bar 46 of the carriage as indicated in 7 the said stop carrying apivoted portion 52 adapted to yield in one direction and to be rigid in the other direction, resting for this purpose against the edgeorlshoulder 53. The marginal stop coophrates with a finger lever 54 pivoted at 55 to the frame and having a stop portion 56 to cooperate with the stop 52. These parts operate in substantially a well known manner, it being obvious that if it is desired to print beyond the margin determined upon the finger lever 54 is swung on its pivot to withdraw the stop 56 out of line with; the stop 52 so as to allow the carriage to have further movement toward the right and then'on the left hand movement during the printing the stop 52 will swing and pass over the stop.56.

From the above it will be seen that the invention consists in a stepped or like etc which 'set in 'difierent positions accor ing to the denomination of the tabulator. 99 key which is struck, said stop controlling the action of the escapement to different numbers of letter spaces through which the carriage moves and said tabulating means as for instance the keys controlling the es capement to give the carriage its spac ng action. I M 4 I claim as my invention i 1. In combination in a Hammond typewriter, a hammer, an escapement ratchet, wheel and pawl, a hammer lever' carrying. said pawl, an escapement lever to engage the ratchet wheel, stop means for limiting the retracting movement of the hammer lever to different degrees, letter keys, tabulator keys independent of the letter keys with connections to the stop means and connections between the said tabulator keys and the escapement pawl of thehammer lever whereby the escapement is released and the stop is set as the result of the operation of a tabulator key, substantially as described.

2. In combination with a hammer an escapement ratchet wheel, a pawl, a hammer lever carrying the said pawl, an escapement 115 lover-,keys with connections to the escapement lever, an arm pivoted to swing in a vertical plane adjacent the ratchet Wheel and having a series of stop shoulders on its edge adapted "to limit the retracting movement of the pawl carrying hammer lever at different points, and means controlling the position of the said swinging stop arm, substantially as described.

In combination in a Hammond typewriter, an-escapcment wheel, a hammer, a hammer lover, a pawl carried by the hammer lever to engage the escapement wheel, an escapement lever having a detent to engage the escapement wheel, means whereby 130 a rock shaft extending from front to rear the operation of the escapement lever will withdraw the pawl from the escapemcnt, wheel, keys with connections to the escapementlever for operating the same, an ad- I jnstable stepped stop for the hammer lever and tabulator keys with connections for set- I ting said step and for releasing the said pawl to allow the hammer lever to move I until arrested by said stop, substantially as I described. l

l. In combination the trip frame, the hammer hook, the escapement mechanism, tabulator keys, an adjustable stop for vary- 1 ing the action of the escapement mechanism. 1 for variable spacing, connections betweenl the tabulator keys and the said stop andf connection between the said tabnlator keys I and the trip frame and hammer hook of a Hammond typewriter, substantially as de scribed. J

5. In combination, the escapement mechanism, an adjustable stop for varying the action thereof consisting of a pivoted arm,

of the machine, the arm and link connecting the rock shaft with the pivoted stop, tabulator keys arranged to give diti'erent degrees of movement to the said rock shaftand connections between the tabulator keys and the cscapement mechanism for releas- 5 ing the latter, substantially as described.

6. In combination the escapcment mechai nism comprising an escapement wheel, a hammer, a hammer lever carrying a pawl i to engage the escapement wheel, an oscillating arm having a plurality of stop shoulders on its edge to engage the hammenlever, a rock shaft, tabulator keys for giving different degrees of movement to the rock shaft and to the swinging arm, a trip frame talmlator key operated, and connections be "tween the tabulator keys and the escape-- ment, substantiall as described.

8. In a typewriter, the combination of means for setting a tabulator stop-lever in different positions according to the tabulating key which is operative, said stop-lever having a series of shoulders furnished to arrest the backward throw of the hammerlevcr after different degrees of movement according to the denomination of the tabulating key which is struck.

In testimony whereof, I affix my signature in presence of two witnesses.

JAMES B. HAMMOND.

'l'litnesses JOHN M. Bancnorr, "WALTER DONALDSON.

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