US911842A

US911842A - Type-writing machine.

Info

Publication number: US911842A
Application number: US39764107A
Authority: US
Inventors: Carl J Rollefson
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-10-16
Filing date: 1907-10-16
Publication date: 1909-02-09
Anticipated expiration: 1926-02-09

Description

O. J. ROLLEFSON. TYPE WRITING MAGHINE. APPLICATION FILED 00T.16, 1907;

Patented Feb. 9, 1-909.

3 SHEETSSHEET 1.

mrmi c. J. ROLLBFSON.

TYPE WRITING MACHINE. APPLICATION FILED 00T.16, 1907.

Patented Feb. 9, 1909.

3 SHEETS-SHEET 2.

' awuanfoz C. J. ROLLEFSON.

TYPE WRITING MACHINE.

APPLIOATION FILED 00T.l6, 1907.

. 91 1,842, Patented Feb. 9,1909.

. J 3 QHEETS-SHEET 3.

Snuanfoz panying drawings in which CARL J. noLLEFsoN, or ELIQSWORTHMWISCONSIN. j

TYPE-WRITING MACHINE.

no. 91' 1,s42.

\ To all whom it may concern:

Be it known that I, CARL J ROLLEFSON, a-c-itizen of the United States, residing at Ellsworth, in the county of Pierce and State 5 of Wisconsin, have invented certain new and useful Improvements in Type-Writing Machines, of which the following is a specification.

Myinvention relates to typewriting ma-, chines and has for its object the improvement of the keyboard and operation of the printing mechanism by which. two letters may be printed simultaneously. or the final letter at theend of a word may be printed and the space following the word provlded for atone stroke. I have found by actual experiment that the number .of times that a I letter is followedby .one of the vowels including y orthe space at the end of the word is between thirty-five and forty per .cent. of the strokes necessary operating a typewriting machine.

My invention contemplates the provision of extra keys at either or both ends of the keyboard of an ordinary typewriter or in any other convenient position and have them connected with extra type arms arranged to strike the platen one space to the right of the ordinary ty e arms, said type arms being assigned to the etters a e i o u and y and one extra key in each set being assigned to space.

I have described a difler'ential s acing mechanism hereinafter that is applica le to a certain class of machines and it will be understood that, some: "form of differential spacing mechanism will be necessary in' every 1 My invention will be described in detail hereinafter and illustrated in the accom- Figure 1 is a view of a keyboard showing my lmproved arrangement Fig. 2, ,adiagrammatic view showing the manner of. connectmg the respective keys for simultaneous operation, Fig. 3, a view 1n elevation of" a pair of keys showingt'he means to connect them for simultaneous operation, Fig. 4, a

view showing the arrangement of the type bars in the basket, Fig. 5, a fragmentalside escapement.

Specification of Letters Patent.

Application filed October 16, 1907.- Serial No. 397,641. I

to be made in view of the escapement, Fig. 6, an end view. showing the operating mechanism for theescapement, and Fig. 7, aplan :v'iew of the Patented Feb. 9, i909.

ters indicate corresponding parts throughout the several views.

As hereinbefore stated my invention consists essentially in providing an extra set of typebars in a typewriting machine and connecting them wlth extra keys on the key.

board and so arranging the keys and type bars that any one of them may be struck simultaneously with one of the regular keys on the key board so that twoletters may be written simultaneously or the final letter of a Word and the space following it may be formed at one stroke. To this end my invention consists in adding a number of type bars 1 at the right side of the basket of bars ordinarily found in a typewriting machine and indicated at 2. Type-bars 1 are so hung that they strike the paper one s ace to the right of the position that the or inary type bars strike 1t. On the keyboard, shown m Fig. 1, thevkeys ordinarily found thereon are indicated by 3, said keys being 0 eratively connected with the type bars 2, w ile 4 indicates keys 0 eratively connected with type bars 1 so t at one ofthe keys 3 and one of the keys 4 may be depressed at one time and two letters be written together. r

In the drawings I have shown two sets of extra keys 4, one set at each end of the keyboard, and shown keys assigned to the letters 0 u and and one key in each set assigned to Space. The

extra letter keys at the right of the keyboard only are connected-directly with the type bars for writing the respective letters and in order that the letter keys at the left end of the key board may actuate the type e bars, it is neoessarythat the keys at t left be operatively connected with the keys at the right of the keyboard and this I have shown in Figs. 2 and 3. The means for connecting the extra keys of each letter for simultaneous operation consists of rods 5 pivotally secured together at one end and aving their other ends pivotally secured to the keys at the right and left of the keyboard for each letter while each rod is pivotally secured intermediate of its ends to a suitable support as shown, at 6.

For the successful operation of my improved typewriter it will be necessary to provide a spacing mechanism so arranged that when one of the keys 3 only is operated the carriage will move forward but one carriage will move forward two spaces and the copy be carried forward so that it will be in the proper position to receive an impression from one of the type bars 2. The difierential spacing mechanisms will vary in construction with the diiferent constructions of machines to which my invention will be attached but in the drawings I have shown one form of spacing mechanism which I will proceed to describe.

7 indicates a ratchet bar which is secured,

to the carriage 7 of the machine, said ratchet bar being pivotally mounted so as to raise and lower for the successful 0 eration of the spacing mechanism as in mac lines of this class.

8 indicates a plate secured to the frame of the machine having a transverse slot 9 in one end and two

recesses

10 and 11 therein connected by a slot 12 in the partition wall 13 between said

recesses

10 and 11. Slot 9 is formed to receive dog 14 ivotally secured to one end of lever 15 which has its other end connected by rod or rods 16 with cross bar 17 that hangs under the key bars 18 connected with keys 3.

19 indicates a sliding detent mounted in recess 10 having a bar 20 on its rear end that extends through slot 12 into

recess

11, and 21 indicates an expansible coil spring mounted in said recess 11 and bearing against the end of bar. 20.

22 indicates a lug or projection on detent 19 that engages the teeth of ratchet bar 7 to stop the movement of the carriage 7 23 indicates a transverse slot in the end of recess 10 adjacent to slot 9 and 24 a stop slidably mounted therein and secured to rod 25 connected with cross bar 26 that is on a lower plane than cross bar 17 and ada ted to be engaged by a projection 27 on eac of the bars 28 connected with the extra keys 4.

The operation of the differential spacing mechanism is as follows: When one of the ordinary keys 3 only is depressed the key bar 18 secured thereto actuates the type .bar 2 connected therewith, and at the same time by depressing the cross bar 17 and the end of lever 15, connected therewith, raises dog 14 into engagement with ratchet bar 7 which is raised out of engagement with lug or projection 22 on detent 19. Detent 19 is actuated by spring 21 and driven forward until it engages stop 24. When pressure on key 3 is released and it resumes its normal position the dog 14 descends and with it the ratchet bar 7 which again engages the lug 22 on detent 19 one space removed from its former engagement therewith and when the dog is released from engagement with said ratchet bar the carriage and ratchet bar together with detent 19 are carried along under the impulse of the carriage actuating means (not shown), and against the resistance of spring 21, until the rear end of the detent strikes partition 13, and the motion of the carriage arrested, and the machine is in .position for another stroke.

When one each of the keys 3 and 4 are depressed the operation ust above described is repeated except that the projection 27 on the key bar 28 connected with the key 4 that is actuated depresses cross bar 26 and with it stop 24 so that instead of the detent 19 being stopped by said stop 24 it is projected the full length of recess 10 and when the ratchet bar 7 is lowered, by releasing the pressure on dog 14, the lug or projection 22 engages it two spaces removed from its former position and the carriage moves forward two spaces instead of one.

Having thus described my invention what I claim is 1. In a typewriter, in combination with the ordinary set of type bars, a secondary set of type bars arranged to make an impression to the right of the ordinary set, keys operatively connected with the ordinary set of type bars, and two sets of secondary keys one set arranged at each side of the last men-- tioned keys and operatively connected with the secondary set of ty e bars, substantially as shown and described 7 2; In a typewriter, in combination with the ordinary set of type bars, a secondary set arranged at the right of the ordinary setand adapted to be actuated simultaneously therewith, keys operatively connected with the ordinary type bars, two secondary sets of keys assigned to the same characters, said secondary sets of keys being arranged at each side of the first mentioned keys, and opera tive connections between said secondary sets of keys and the secondary set of ty e bars, substantially as shown and describe c 3. In a typewriter, in combination with the ordinary set of type-bars, a secondary set assigned to a portion of the characters used in the first-mentioned set, keys operatively connected with the ordinary set of type bars, two sets of secondary keys, one

set arranged at each side of the last mentioned keys and operatively connected with the secondary set of type bars, the ordinary set of keys being adapted to be actuated to the exclusion of the secondary set or simultaneously therewith, and mechanism by which when the ordinary set of type-bars are alone operated the carriage will move forward but one space, and'when the secondary set of type-bars are actuated in conjunction with the ordinary set the carriage moves forward two spaces.

4. In a typewriter, in combination with the keyboard and the usual set of keys and type bars, a secondary set of type bars assigned to a portion of the characters used in the usual set, said secondaryjtype bars'jbeing arranged to strike the copy one space to'the right of the ordinary set, and extra keys at each end of the usual set of keys assigned to the characters-to which the secondary set of the ordinary tydpe bars, two. secondary sets,

of keys arrange at the two sides of the ordinary set of keys, the secondary set at the right side connected directly with the secondary set of type bars, and the secondary set at the left of the keyboard operatively connected with-the secondary set at the right of the board so as to actuate the secondary type bars, substantially as shown and described.

6. In a typewriter, in combination with the ordinary set of type bars, a secondary set arranged at the right of the ordinary set and ada ted to be actuated simultaneously therewit keys operatively connected with the ordinary typebars, two secondaryv sets of keys arraned at the two sides of the ordinary set' 0 keys, the secondary set, at the right side connected ,directly with the secondary set of type bars, levers suitably fulcrumed and pivotally secured together in pairs and one of each pair of levers operativel'y connected with the secondary keys at the two sides of the keyboard assigned to the same characters, substantially as shown and described.

In testimony whereof I hereto aflix my signature in the presence of two witnesses.

\ CARL J. ROLLEFSON.