US1737306A - Key-set tabulator for typewriting machines - Google Patents

Description

NVZG, 19725. c, GABRlELsQN l l1,737,306

KEY SET TABULATOR FOR TYPEWRITING MACHINES Filed Maron 4, 192e l2 sheets-sheet 1 26a Z a# 3,2 5 2 /Z 27 Nom-26, 1929. c, GABRIELSQN 1,737,306

KEY SET TABULATOR FOR TYPEWRI'I'ING MACHINES Filed March 4, 1926 2 Shaeta-:Sheet-Z lll Patented Nov. 26, 19.29t

[stra CARL GABRIELsoN, or SYM-ionen, new Yoan, Assienoa rro L o sivrifrii & concisa TYPEwnIzri-ins INC., or sYniioUsii, iiiiw Yoan, A ooiaronnrioii or New Yom:

KEY-SET TAB'ULATOR FOR TYPEWRIT'ING MACHINES Application filed March 4, 1926. Serial No. 92,367.

This invention relates to improvements in tabulating mechanism for 'typewri'ting machines of the gen-eral character illustrated in U. S. Letters Patent 971,696 dated Oct. 4f, 1910.

In this patent the tabulator stop bar or rack isprovided with notches or guides lcorresponding to each letter space movement of the carriage and in each notch or guide a movable stop is permanently mounted. A. key operated linger is so located adjacent to the rack that it will move one of the stops into operative position when the key is operated, the stop selected `corresponding to the position of the carriage. The stops are yieldingly held either in operative or inoperative position `and means are provided tor simultaneously restoring the stops from the operative to the inoperative position.

The present invention relates to various improvenients in details designed to adapt a key set tabulator of the type rdescribed to a modern typewriting machine, to simplify its construction and to ren-der its operation vmore positive.

The invention will be more particularly '25 described with reference to the accompanying drawing, in whichl Fig. 1 is a rear view oiC a typewriting machine equipped with my improved tabulator; Fig. 2 is a section about on vthe line 2-2 of Figure 1;

Fig. 3 is a plan view of the tabulating mechanism;

. Fig. 4 is a perspective view of a part 'ot' the stop bar or rack and one of the stops;

Fig. 5 is a section on the line 5 5 Vof Figure 1;

Fig. 6 is a section on the line 2-2 of Figure 1 illustrating the operation of setting a stop; and

Fig. 7 is a similar view illustrating the inanneri'of clearing all of the stops, that is,of moving them From operative to inoperative position.

.Referring to the drawing, 10 indicates the frame of the machine and 11 a part ot the lcarriage which travels on `suitable ball bearing. Apart from the tabulating mechanism the machine shown is the well known C `Smith typewriter. The carriage is provided with the tabulator stop rack 12 which has on its Jfront and rear sides slots 13, 14 to receive the stops, there being a pair of these slots 13, '14 for each letter space movement of thecarriage. The rack may be secured at its ends to the carriage in any suitable way. As shown in Figures Ai, 6 and 7 the teeth between the slots 13 have upper and lower V- shaped notches 151 16 which are adapted to cooperate with spring detente 17 on the stops 1S. Each stop has la central opening the 'wails 19 et which slide in the grooves 13, la and a rear projection 20 which cooperates with any one ot a series of stop levers 21 which levers are pivoted at 22 in the machine trame and are operated by the usual tabulator keys, not shown. The rear leg 19 of each stop has downward extension 19a which assists in guiding the stop on the rack- The means for setting` 'one or more of the stops als 'desired,`comprises an arm 23 pivoted in a fixed bracket farm normally elevated by a spring 25. As shown in Figure 2, the `:tree end of the arm 23 is located above and over the upper edges oi' the tabulator stops and adapted to engage one of the stops'an'd push it down when the arm is depressed. The particular stop engaged will depend upon the position of the carriage. VJhen the carriage is positioned to select the desired stop, a blade or universal bar 26 is depressed by means of a key 27. The blade 26 is 'pivotally mounted at its ends in the 'frame 28 which carries the tahulator rack.' It wili be apparent that when the blade 26 is rocked downward, it will operate the arm 23 and depress whichever tabulat'or stop happens to be beneath 'the arm. The bla-de is normally held in its upper position by a 'spring 29. vany number of stops may be depressed, depending upon the character of the work to be done. When a stop is depressed its holding pawl 17 is forced out of the upper V- `shaped notch 15 in the adjacent tooth of the rack and into engagement with the corresponding lower V-shaped notch 1G. The stops are therefore yieldingly locked in either operative or inoperative position. The free edge of theblad-e normally rests against arms 26a fixed on the carriage and the arm or pusher V 2e the free end ot whichv shown in Figure 3.

The restoring blade 3() is rocked by means of a crank 32 pivoted in one or" the ends 28 of the tabulator frame, as shown in Figure 5. Connected to the cranll:V is a disk33 carrying an anti-friction roller 34 which lies Y of the lever 32.

,vided lwith stop shoulders under an arm 35 connected with the restoring blade 30. The disk 33 is preferably pro- 36, 37 cooperating with a vlined pin 38 to limit the movement One of these shoulders 37 limits the movement of the lever and of the blade 30 so that the blade will raise the stops exactly to theirfnormal position when the lever is moved, that is, tothe position which l the spring pawl on the stop will engage the upper notch in the rack. In Figure 6 the blade 30 is shown in its lowermost position, which permits any one of the stops to be fully depressed, and in Figure 7 the blade 30 is shown at the upper limit of its movement. It will be noted .that the blade 30 underlies the stops adjacent to the holding pawls and hence the thrust of the blade is most directly applied to withdrawing the `p'awls from the lower notches in the rack bar and does notl tend to tip the stops on the bar.

LThe stops are locked in position on the rack bar by a rod 39 which engages the projecting shoulders 40 on the rear sides of the stops when they are in their upper position, as shown in Figure 7. It will be understood Y that in the operation ofthe machine as many stops are used on the tabulator rack as there are notches or grooves in the rack, that is, a stop is provided for each letter space movement of the carriage The locking rod 39 is detachably secured in the end plates 28 of the tabulator rack so that defective stops may be removedand replaced when desired.

, The operation'oin the device will be understood from the foregoing description. Whenever it is desired vto set a tabulator stop for l a'particular piece of work, the carriage is brought into the position at which the stop is to take eect, as determined by the scale and the finger key 27 is then depressed to throw the selected stop down into operativel position.'V This is repeated for each stop de- Y sired. The machine is then operated in the usual manner and when the selected Ystops are no longer necessary, the lever 32 is operated to rock the restoring blade 30 and raises all of the stops to normal inoperative position on the bar.

An important feature 'of the present invention consists in mounting both thedevices for setting the tabulator stops and the devices for restoring said stops to inoperative position on the carriage whereby the tabulating mechanism may be completely controlled without resort to the keyboard and without removing the hands from the carriage. This has been found to be a great convenience and to save considerable Vtime in tabulating work. Thus the operator, with one or both hands on the carriage, moves the carriage to the position at which a tabulator stop is required, and then sets the stop by depressing thekey 27. In fact, the operator may select a stop and set it my simply grasping the key 27, moving the carriage to the proper point, and then depressing the key. Heretofore, it has been customary to set the carriage andthen lower the hand to the keyboard to adjust the selected stop.

Having thus described the invention what is claimed as new and desired to be secured by Letters Patent is: v

l. In a tabulating mechanism for typewriting machines the combination with a tabulator raclr mounted on the carriage, and tabulating stops movable on said rack, of an arm pivoted on the frame of the machine and overlying said rack and stops and a blade or universal bar pivoted on the carriage and adapted when rocked to depress the arm and set a stop to operative position.

2. Ina tabulating mechanism for typewriting machines the combination with a tabulator rack mounted on the carriage, and

tabulating stops movable on said rack, of an' arm piv'oted on the frame of the machine and overlying said rack and stops and a blade or universalbar pivoted on the carriage and adapted when rocked to depress the arm yand set a stop to operative position, saidV arm being normally raised by spring means into contact with the universal bar and said bar being provided with a finger lever for depressing the same.

3. In a tabulating mechanism for typewriting machines, a tabulator rack having grooves on opposite sides thereof, a` series of tabulator stops mounted in said grooves and movable therein between operative and inoperative positions, each Vstophaving aV spring detent forv holding it yieldingly. in either position and ablade `or universal bar pivotally mounted exteriorto the rack and adapted when rocked to move all of the stops to inoperative position. i Y v.

4. In a tabulating mechanism for typewriting machines, a tabulator rack having grooves on opposite Ysides thereof,a'series ot tabulator stops mounted in said grooves 'y and movable therein between operative and' inoperative positions, and a lolade or universal loar pivotally mounted exterior to the rack and adapted when rocked to move all of the stops to inoperative position, an arm' on said bar, a spring for holding said universal bar in inoperative position and a lever having a roller acting on said arm for operating said bar against the tension of the spring.

5. In a typevvriting machine, the combination With a frame and a pivoted arm mounted on the frame, of a carriage movable on the frame, a tabulator rack ixedly mounted on the carriage, a series of stops adjustably mounted on the rack, and devices m'ovably mounted on the carriage and cooperating With the arm for moving selected stops from inoperative to operative position, said devices comprising a universal loar and a key for operating said bar, both mounted upon the carriage. v

6. In a typewriting machine, the combination with a frame and pivoted arm mounted on the frame, of a carriage movable on the frame, a tabulator rack fiXedly mounted on the carriage, a series of stops adjustably mounted on the rack, a device movaloly mounted on the carriage and cooperating With the arm for moving selected stops from' inoperative to operative position, and a second ldevice mounted on the carriage for restoring the stops to inoperative position.

7. In a typewriting machine, the combination With a frame and a pivoted arm mounted on the frame, of a carriage movable on the frame, a tabulator rack iXedly mounted on the carriage, a series of stops adjustahly mounted on the rack, a device movably mounted on the carriage and cooperating With the arm for moving selected stops from inoperative to operative position, and a second device mounted on the carirage for restoring the stops to inoperative position, each of said devices comprising a universal bar mounted on the carriage, and hand-operated means on the carriage for moving said bars.

In testimony whereof I hereunto aiiiX my signature.

CARL GABRIELSON.

Images