US1117658A - Tabulating mechanism for type-writing machines. - Google Patents

Description

O. GABRIBLSON.

TABULATING MECHANISM FOR TYPE WRITING MACHINES.

APPLICATION FILED AUG. 16, 1904,

1,1 17,658, Patented Nov. 17, 1914.

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TABULATING MECHANISM FOR TYPE WRITING MACHINES.

APPLICATION FILED AUG. 16, 1904 1,117,658, Patented Nov. 17, 1914.

4 SHEETSSHEET Z.

O. GABRIELSON.

TABULATING MECHANISM FOR TYPE WRITING MACHINES.

APPLICATION FILED AUG. 16, 1904 1,1 17,658, Patented Nov. 17, 1914.

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O. GABRIELSON. TABULATING MECHANISM FOR TYPE WRITING MACHINES.

APPLICATION FILED AUG. 16, 1904.

1,1 17,658, Patented N0v.17,1914.

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0 3 43 3 29 @Hommaga UNITED STATES PATENT OFFICE.

CARL GABRIELSON, OF SYRACUSE, NEW YORK, ASSIGNOR TO L. C. SMITH & BROS. TYPE'WRITER COMPANY, OIE SYRACUSE, NEW YORK, A CORPORATION OF NEW YORK.

TABULATING MECHANISM FOR TYPE-WRITING MACHINES.

1/ all whom it may concern:

Be it known that I, CARL GABRIELSON, a citizen of the United States, and resident of Syracuse, county of Onondaga, State of New York, have invented certain new and useful Improvements in Tabulating Mecha nism for TypeJVriting Machines, of which the following is a specification.

The present invention relates particularly to the mechanism for releasing the carriage of a typewriting machine from its feed mechanism, permitting it to run freely under the influence of its impelling spring or motor, and to means for stopping it at any desired point for the purpose of producing tabulated matter, such mechanism being usually termed tabulating mechanism.

The invention willbe described in detail in connection with the accompanying drawings, in which,

Figure 1 is a plan view of the tabulator mechanism and part of the main and carriage frames; Fig. 2 is a right side elevation of the same, partly broken away and partly in section; Fig. ,3 is a rear elevation of the same, partly in section; Fig. 4 is a detail top plan view of the detent actuating bail, and the brake; Fig.1) is a rear view of the bar forming the stop-detent carrier; Fig. 6 is a perspective view of the bracket which supports the detent carrier; Fig. 7 is a bottom plan view of the stop-detent carrier with the detent operating lever and locking pawl in their normal positions; Figs. 8 and 9 are top plan views, the former partly in section, of the stop mechanism, illustrating its operation; and Figs. 10 and 11 are side and edge views, respectively, of the adjustable stops of the tabulator bar. Fig. 12 is a detail of the bail for withdrawing the feed pawls to release the carriage.

Referring to the drawing, 1 indicates the base of a typewriting machine, 2, the top plate, and 3, the back bar of the carriage. The carriage is provided with the usual rack 4 engaging a pinion 5 upon a shaft to which is connected the escapement wheel 6, the teeth of which are normally engaged by the spacing pawls 7 The latter may, however, be released from engagement with the escapement wheel, when desired, by the depression of a tabulator key, for the purpose of releasing the carriage and permitting it to be drawn to the left by its spring until Specification of Letters Patent.

Application filed August 16, 1904.

Patented Nov. 17, 1914. Serial No. 220,943.

arrested by a stop or detent. In the present instance there is a stop or detent upon the carriage, which is moved by the depression of the tabulator key into position to engage a stop upon a fixed tabulator rack or scale, as will be hereinafter explained.

The tabulator key 8, by means of-Which the carriage is released and the movable stop or detent brought into operative position, is mounted upon the forward ends of a pair of key levers 9, the rear ends of which are secured to a horizontal rock shaft 10, having its ends journaled in a pair of studs 11, which latter are screwed into the base of the machine and held by checknuts 12. The up and down movement of the key and key levers is limited by a pair of double stops 13 having lateral projections which extend above and below the key levers, and the key is normally held in its uppermost position by means of a suitable spring 14. A depending arm 15 is adjustably secured to the rock shaft 10 by a collar and set screw, as shown, and a link 16 connects the lower end of this depending arm with one end of a rocker arm or lever 17, which is secured by a collar 17 to a vertically arranged rock shaft 18. The lower end of this vertical rock shaft extends through and is journaled in an opening 19 in the base plate, and its upper end is j ournaled in an opening 20 in the tabulator rack bar 20. The shaft is supported by a collar 21 resting upon the base plate.

It will readily be seen that the depression of the tabulator key will move the link 16 rearwardly and cause the shaft 18 to rock, and when the key is released, the spring 14 will return the parts to their normal positions.

The rocker arm or lever 17 has an extension 17 arranged at the rear of a vertical arm 22, which is secured by a collar and set screw to a rock shaft 23. This rock shaft, as shown,-is arranged transversely of the machine in brackets '24 depending from its base. An arm 25 is secured to and projects forwardly from the rock shaft 23, and a link 26 connects said latter arm with a bail 27 pivoted adjacent to the escapement mechanism and having an arm 27* adapted to dedepressing the arm 25, link 26, and bail 27, thus'releasing the carriage from the escapement mechanism.

An arm 28 is secured to the shaft 18, near its upper end. One end of a bar 29 is pivoted to the free end of this arm, and an arm or link 30, of the same length as the arm 28, is pivotally connected to the opposite end of the bar 29 and to the under side of the tabulator rack bar. The bar 29 extends parallel with the tabulator rack bar, and with the line of movement ,of the carriage, and it moves forward parallel therewith when the vertical shaft is rocked by the depres sion of the tabulator key, and backward when the key is released.

A sheet metal bracket 31 is secured to the carriage back bar and projects upwardly and thence horizontally rearward. This bracket supports a sliding detent-carrier 32 opposite the tabulator rack bar. The carrier 32, as shown, consists of a metal bar having longitudinal slots 32* and 32 extending inwardly from its ends; through which tongues 31 and 31 of the bracket extend. The carrier has a cavity 32 (Fig. 8) and a spring 33 in said cavity is interposed between the tongue 31 and the inner end of this cavity. A. stop screw 34 is threaded into the outer end of the cavity. A stop screw 35 extends into the opposite end of the carrier in line with the slot 32 and is held in place by a checknut 36 and a washer 37, the latter surrounding a reduced portion 32 of the carrier. The carrier is normally pressed to the left, as shown in Fig.8,

by the compression spring 33, bearing against the tongue 31", and the movement to the left is limited by the stop screw 34, which engages said tongue. The carrier is retained upon the tongues and guided inits longitudinal movements by lips or projections 31 upon the bracket adjacent to the tongues. The carrier is flat on its lower surface, as shown in Figs. 5 and 7 and a bell crank lever 38 is pivotally secured to said flat portion. This bell crank lever has one arm 38 provided with a roller 38, ar-

by a spring 41 interposed between the carrier and-the head of the stem.

It will be seen that when the bar 29 is moved forward by the depression of the tabulator key, the lever 38 will be rocked, and the detent 39 will be projectedTear' wardly into line with a stop 42, adjustably mamas secured to the tabulator rack at the point where it is desired to have the carriage stop. When the tabulator key is released and the bar moved backward the spring 41 will retract the detent 39 and return the lever 38 to its normal position, with the roller 3S close to the bar 29.

In stopping the carriage is cushioned by the spring 33, which is interposed between the detent carrier and the tongue 31 on the bracket, and, as shown in Fig. 9, the set screw 35, engaging the tongue 31, forms a final stop for the carriage, after the cushion spring has been compressed by the impact of the detent against the stop on the tabulator rack. lVhen the detent is released from the stop, after the carriage has been brought to a standstill, the detent carrier is moved to the left until the set screw 34 strikes the tongue 31", as shown in Fig. 8.

In order to prevent rebounding of the carriage when the detent strikes the stationary stop, a holding or looking pawl 43 is pivoted within the slot 32" in the carrier, upon a pivot 44, and this pawl is provided with a toe 43 extending within a slot 39*, shown in dotted lines, Figs. 7, 8 and 9, in the adjacent face of the detent. This pawl is normally pressed rearwardly by a light spring 45 set in a cavity 46 in the rear side of the detent carrier. This toe 43 is normally pressed against the rear end wall of the slot 39 and the pawl is normally held out of line with the stationary stop or stops by the spring 41 on the detent pawl, which is stronger than the spring 45. When, however, the detent is moved rearward by the movement of the oscillating bar 29, when the tabulator key is depressed, the holding end 43 of the pawl is also-pressed rearward into line with the stationary stops by the spring 45. As the carriage moves to the left, when released, the stationary stop 42 is first engaged by the rear inclined edge of the pawl, as shown in Fig. 8, and the pawl is thereby pressed forward against the action of its spring 45 until the holding end 43 of the pawl passes the stationary stop,

when said end is pressed rearwardly by the spring 45, and when the detent strikes the right side of the stationary stop, it will be seen from an inspection of Fig. 9,that the holding or looking pawl will engage the left side of the stationary stop, and will prevent rebounding of the carriage. When the tabulator key is released and the detent is retracted by its spring, the holding or locking pawl, the toe of which is loosely connected to the detent, will also be drawn out of line with the stops.

In order to retard the movement of the plied with uniform force each time the tabu later key is depressed, and the friction of this :brake is not dependent inany way wheel.

upon the amount of pressure applied by-the operator to the tabulator key. A brake 1ever 47, Figs. 2 and 3 is pivoted at 48 to the top plate of the machine. The short arm =47 of the lever is curved to fit a brake wheel 49 on the shaft of the escapement This brake wheel may, as shown, he an'enlarged hub of the escapement wheel. A cam 50, carried by the shaft 18, normally bears againstthe long arm of the brake lever and holds the short arm out of engagement with the brake wheel. A spring 51, housed in a boss 52 on the top plate, presses the long arm of the lever against the cam, and the short arm toward the brake wheel. The long arm of the brake lever-extends through a $101152 in the boss 52, and a set screw 53, in the boss, prevents the accidental displacement of the lever.

In operation, when the rock shaft 18 is turned by the depression of the tubulator key, to release the escapement and set the detent stop, the cam 50 turns with the rock shaft-and allows the spring 51 to press the brake shoe against the brake wheel, which wheel, it will be understood, is rotated by the movement of the carriage, which is geared to the escapement wheel shaft. A brake shoe of any suitable material can he applied to the short curved end of the lever, if desired, and the amount of friction between the brake lever and wheel may be controlled by adjusting a screw 54, upon which the spring 51 bears.

The adjustable stops 42, shown in detail in Figs. 10 and 11 are each preferably made from a single piece of flat metal, having two tongues 42 and 42 which fit into the grooves 20 on the front and rear edges of the tabulator rack bar. One tongue 42 of each stop is thinned, so as to make it flexible, and bent a little to one side to normally occupy a different plane from the other, as shown in the drawing, so that the stop will lock itself to the tabulator rack when the tongues are pressed down into the grooves in the rack.

It is to be understood that my invention may be embodied in other forms of mechanism, or, in other words, that it is not limited to the particular construction and arrangement of parts illustrated and described herein.

Having described my invention what I claim and desire to secure by Letters Patent 1s:

1. The combination with a typewriter carriage, feed mechanism therefor, and means for releasing the carriage from its feed mechanism, of a longitudinally immovable tabulator rack, a tabulator stop thereon to arrest the 'movementof the carriage when released, a detent movably supported upon the carriage arranged to be projected to engage said stop, and a pawl movably supported upon the carriage and arranged to engage the opposite side of the stop to prevent rebounding.

2. The combination with a typewriter carriage, feed mechanism therefor, and means for releasing the carriage from its feed mechanism, of a tabulator stop to arrest the movement of the carriage when released, a detent upon the carriage, and means to project the same to engage said stop, a movable pawl on the carriage for engaging the opposite sid; of the stop, and means for retracting both the detent and the pawl to release the carriage from the stop.

3. The combination with the carriage, and means for releasing the carriage comprising a tahulator key, of a stop, a detent movable with the carriage and normally out of line with the stop, a transversely movable bar mounted on the frame of the machine and operatively connected with-the tabulator key, and a device traveling with the carriage and arranged to move the detent into line with the stop, said device having a part adapted to be engaged by said bar.

4. The combination with the carriage, and means for releasing the carriage comprising a tabulator key, of a stop, a detent movable with the carriage and normally out of line with the stop, a transversely movable bar mounted on the frame of the machine and operatively connected with the tabulator key, and a pivoted lever traveling v\ ith the carriage and having one part arranged in the path of movement of said bar and another part arranged to engage the detent.

The combination with the carriage and means for releasing the same, of a stop, a detent movable with the carriage and normally out of line with the stop, means for moving said detent into line with the stop, a locking device held normally out of line with the stop, and means for moving said device into position to engage the rear side of the stop when the detent strikes the stop.

6. The combination with the carriage and means for releasing the same, of a relatively stationary stop, a detent movable with the carriage and normally out of line with the stop, means for moving said detent into line with thrstop, and a spring pressed pawl traveling with the carriage and movable with the detent into and outof line with the stop, said pawl being arranged to engage the stop in advance of the detent and to spring outwardly behind the stop.

7. The combination with the carriage and means for releasing the same, of a relatively stationary stop, a detent movable with the carriage and normally out of line with the stop, means for moving said detent into line with the stop, and a spring pressed pawl traveling with the carriage and having its free end loosely connected to the detent, said pawl being movable with the detent into and out of line with the stop, and arranged to engage the stop in advance of the detent and to spring outwardly behind the stop.

8. The combination with the carriage and means for releasing the same, of a relatively stationary stop, a detent movable with the carriage, a spring for holding said detent normally out of line with the stop, means for moving said detent into line with the stop, a locking pawl traveling with the carriage and having its free end loosely connected to the detent, and a spring arranged to press said detent toward the stop.

' 9. The combination with the carriage and means for releasing the same, of a relatively stationary stop, a detent movable with the carriage and normally out of line with the stop, means for moving said detent into line' with the stop, means on the carriage for cushioning the impact of the detent against the stop and means for positively preventing rebound of the carriage.

10. The combination with the carriage and means for releasing the same, of a relatively stationary stop, a detent movable with the carriage and normally out of line with the stop, means for moving said detent into line with the stop, means for cushioning the impact of the detent. against the stop, and

means for preventing the rebounding of the carriage when the detent strikes the stop.

11. The combination with the stationary tabulator rack, the step thereon, the carriage and means for releasing the same, of a relatively stationary stop a sliding detent carrier, a support for said carrier secured to the carriage, a detent mounted on said carrier and movable into and out of line with the tween said carrier and its support.

12. The combination with the carriageand means for releasing the same, of a relatively stationary stop, a sliding detent carrier, a support for said carrier secured to the carriage, a detent mounted on said carrier and movable into and out of line with the stop, a cushioning spring arranged between said carrier and its support, and a stop arranged to limit themo'vement of the carrier relatively to its support.

13. The combination with the carriage and means for releasing the same, of a relatively stationary stop, a sliding detent carrier, a support for said carrier secured to the carriage, a detent mounted on said carrier and movable into and out of line with the stop, a cushioning spring arranged between said carrier and its support, and a locking device upon said carrier arranged to engage the rear side of the stop and prevent rebounding of the carriage.

14. The combination with the carriage and means'for releasing the same, of a relatively stationary stop, a bracket secured to the carriage and having two arms, a detent carrier comprising a bar having longitudinal slots in its ends through which said arms extend, a cushion spring arranged within said carrier and bearing against one of said arms, stops arranged in the ends of the carrier and adapted to abut against said arms, and a movable detent mounted in sand carrier and adapted to engage said stop.

15. The combination with the carriage and means for releasing the same, of a relatively stationary stop, a bracket secured to the carriage and having two arms and guides or lips projecting laterally from the ends of said arms, a detent carrier comprising a bar having longitudinal slots in its ends through which said arms extend, a cushion. spring arranged within said carrier and bearing against one of said arms, stops ar- .ranged on the ends of the carrier and adapted to abut against said arms, and a movable detent mounted in said carrier and adapted to engage said stop.

16. In a typewriting machine, the combination with a detent traveling with the carriage, of a rock shaft arranged vertically at the rear of the machine and having an arm at its upper end, a laterally movable bar extending transversely of the machine and pivoted to said arm, a link also connected with said bar, a tabulator key, and connections between said key and shaft for rocking the latter to move the bar to operate the detent.

17. In a typewriting machine, the combination with a tabulatonkey arranged at the front of the machine, a vertical rock shaft journaled at the rear of the machine, and connections between said key and shaft for rocking the latter, of a rock shaft arranged h rizontally at the rear of the machine, a lever secured to the vertical shaft and adapted to engage an arm on said horizontal shaft to rock the latter when the key is depressed, and means connected with saidhorizontal shaft for releasing the carriage.

18. In a typewriting machine, the combination with the carriage, of abraking surface movable with the carriage, a 'brake adapted to engage said surface, a spring normally pressing the brake into engagement with said surface, means for varying the tension of the spring, and means for normally holding the brake apart from said surface.

19. In a typewriting machine, the combination of a brake wheel in gear with the carriage, a braking lever adapted to engage said Wheel, a spring normally tending to engage the brake with the wheel, and means for adjusting the tension of said spring.

20. In a typewriting machine, the combination with the carriage, of a tabulator key, and means connected with said key for releasing the carriage, a braking surface movable with the carriage, a brake adapted to engage said surface, a spring normally tending to apply said brake to said surface, and means connected with the tabulator key for applying and releasing said brake.

21. In a typewriting machine, the combination with a tabulator key and mechanism connected therewith for releasing the carriage when the key is moved from its normal position, of a brake wheel upon the escapement shaft, a brake lever arranged to engage said wheel, a. spring tending to force the lever against the wheel, means for normally holding the lever out of engagement with the wheel, and means operatively connected with the tabulator key for releasing the lever when the key is moved to release the carriage.

22. In a typewriting machine, the combination with a tabulator key and mechanism connected therewith for releasing the carriage when the key is moved from its normal position, of a brake wheel upon the es capement shaft, a brake lever arranged to engage said wheel, a spring tending to force the lever against thewheel, a cam normally holding said lever out of engagement with the wheel, and means connected with the tabulator key for moving said cam away from the lever when the key is moved to release the carriage.

23. In a typewriting machine, the combination with a tabulator key and mechanism connected therewith for releasing the carriage when the key is moved from its normal position, of a brake Wheel upon the escapement shaft, a brake lever arranged to engage said wheel, a spring tending to force the lever against the wheel, a vertical rock shaft operatively connected with the tabulator key, and a cam on said shaft normally holding said lever out of engagement with curved to normally occupy a different plane from the other, for the purpose set forth.

25. In a typewriting machine, the combination with the frame and with the carriage movably mounted on the frame, of a tabulating stop and a detent adapted to stop the carriage at a predetermined point, a cushioning spring cooperating with said stop and detent to relieve the shock upon stopping the carriage, and means for governing the rebound of the carriage.

26. The combination with the typewriter frame and the carriage movable thereon, of the tabulator rack and stops and a cooperating detent for stopping the carriage at points predetermined by stops on the rack, a spring arranged to cushion the blow due to the impact of the tabulator stop and detent, and a device for controlling rebound of the carriage after compression of said spring.

27. The combination with the frame and the carriage movable thereon, of a tabulator rack having a stop thereon, a detent adapted to cooperate with the stop to stop the carriage, a second detent also arranged to cooperate With the stop to hold said stop in engagement with the first named detent, and a cushioning spring arranged to relieve the shock of impact of said stop and said first named detent.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CARL GABRIELSON.

Witnesses:

GEORGE ACKILL, CHAS. F. PARSONS.

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