US1898777A

US1898777A - Carriage shift typewriter

Info

Publication number: US1898777A
Application number: US227394A
Authority: US
Inventors: Paul Kaeppler
Original assignee: Individual
Current assignee: Individual
Priority date: 1926-12-01
Filing date: 1927-10-20
Publication date: 1933-02-21
Anticipated expiration: 1950-02-21
Also published as: CH281630A; GB281630A

Description

Feb. 21, 1933. t P KPPLER 1,898,777

CARRIAGE SHIFT TYPEWRITER v Filed Oct. 20 1927 5 Sheets-Sheet 1 5 Sheets-Sheet lI5 Filed Oct. 2Q, 1927 mi i-7.1. Ue n for lileb. El, 1933. P KPPLR CARRIAGE SHIFT TYPEwRITE- R Filed oct.' zo, 1927 5 shams-sheet' 4 Feb. 21, 1933. P, KPPLER CARRIAGE SHIFT TYPEWRITER Filed Oct. 20, 1927 5 Sheets-Sheet 5 im mw www lll |U Patented Feb. 21, 1933 UNITED STATES PATENT OFFICE v PAUL xrrLEa, or DRESDEN, GERMANY CARRIAGE snm 'rYrEwnrrEa Application led October 20, 1927, Serial No. 227,394, and in Germany December 1. 1926.

In typewriting machines of the kind -having carriage case shift mechanism, as distinct from machines in which only the platen is shifted, the diilicult is to eliminate the interference which the carriage-shifting movement causes to -the other movements and heretofore complicated mechanism has usuallybeen provided to avoid this interference. i

'According to the present invention, these difficulties are avoided by arranging that all motion'transmitting parts which effect the actuation of the carria e escapement and ribbon shift and the loc of the keys and which are engageable with coacting arts of the carriage case shift mechanism shall engage such coacting parts of the carriage case shift mechanism by loose contact and pressure in such a manner thatco-operative contact parts or elements shall be provided with contact or pressure faces inclined in the direction of the `carriage case shift movement so that the keyl actuated carriage escapement ribbon shift and key lock motion transmitting partsshall be free to have an inclined shifting movement alon the coacting parts of the carriage case' shit mechanism without disturbing the particular transmission of movement for escapement or other action, as the case may be, which it serves to accomplish. A very simple solution involving few parts is further obtained by causing thecontact and pressure for eifect' .ing the carriage escapement key locking and ribbon shift to act upon the parts connected tothe carriage case shift mechanism by means of arms on a shaft which receives rotary motion from the universal bar carried likewise by arms on this shaft, whilst, on striking a carriage case shift or accent key, a

laterally movable shifting arm mounted on.

the same shaft and actuating the carriage escapement mechanism moves sideways under the action of a lever so that only the ribbon shift and ribbonv feed but not the carriage escapement are actuated.

Heretofore loose contact and pressure have only been used for driving the ribbon shift by means of the case shift 'or accentv key and for actuatitng the locking mechanism from the space key. In such cases the constructional parts could not be simplified and their number reduced to the extent possible with the present invention and the universal bar with the actuating arms could not be made removable 'without unloosening some of the connections.

The accompanying drawings illustrate a constructional example of a typewriter according to this invention.

Figs. 1-4 are longitudinal sections through the machine omitting parts not necessary to illustrate the invention.

. Fig. 1 shows the parts'for the transmission of the key movement to the type bars, 65 shekaction of the space key and the space Fig 2 shows the carriage case shift mechamsm.

Fig. 3 shows the carriage escapement or 7 spacing mechanism.

Fig. 4 shows the shift or accent key mechanism.

Fig. 5 is a plan view omitting the type bars and carriage.' 75

The Akeys 1, 2, 3 and 4'describe a straight or substantially straight motion being guided by

links

5 and 6. As all the keys have the same dip or stroke, the'

links

5 and 6 all make the same angular movement. The lower link 6 is constructed in the form ofa three-armed lever, one arm 7 serving to actuate the type bar 15 through a connecting rod 14 against the action of a sprin 17,' 85 whilst the arm 12 actuates the universa bar 13. The latteris fastened to two side arms 21, which are fixed on a shaft 22, freely mounted between oint bearings 23. Likewise fixed on the siiaft 22 are a locking `arm 90 24,'an arm 25 ,for the ribbon shift (Fig. 3) and an arm 26 for the ribbon feed (Fig. 3).

A carriage escapement lever 27 (Fig. 4) is secured on the shaft 22 to rotate therewith, l

but can swingsideways about a joint 28. The carriage 29 is supported bya bar 30 l (Fig. 2) and on depressing shift keysl31 at the ends of the row of keys 1, the carriage is moved parallel to itself through the medium of

levers

32, 33, 34 and 35 and through m0 links 38 and 39 mounted in the machine frame 11 on shafts 36 and 37. The. carriage Y moves at an angle to the horizontal.

The contact faces on the

arms

24, and 27 are all disposed at a corresponding angle alpha to the horizontal that is when the

arms

25 and 27 are at the end of their movement, because during the escapement action of the carriage as well as during the ribbon shift, they must reach the same position at the end of their movement no matter whether the carriage is in its normal position or raised. The resultin small differences of travel are counterba anced by idle travel at the commencement of movement of the universal bar. The locking arm 24 is at an angle alpha from the start because the locking action must come into operation immediately the key stroke begins.

The carriage escapement action takes place as follows On de ressing one of the keys 1-4, the arms 12 of) the lower links 6 strike the universal bar 13 and rock the shaft 22. Consequently the carriage esca ement arm 27 strikes against a pin 40 o a rocker 42, ixed'on a shaft 41 whereby the rocker 42 is oscillated. A dog 43, is freely mounted on the shaft 41, but is moved with the rocker 42 by a stop pin 44 when the shaft 41 is rocked by the arm 27, the escapement being thereby effected in known manner.

The space key 19 is fixed to levers 18 which rock about a shaft 8 together with the levers 20 (Fig. 3) when the space key is struck. The levers 20 transmit their movement to the shaft 22 through rollers 45 which are mounted on the arms 21 of the universal bar 13, the escapement thereby taking place in exactly the same way as when striking the keys 1-4.

Upon striking a silent key (Fig. 4) a lever 47 corresponding to the key struck is moved by the arm 12 of the lower link 6 and rotates a shaft 48 rotatably mounted in the machine frame. By means of cam blocks 49 secured upon the shaft 48 the lever 27 is rocked laterally against the action of a spring 50. As there is an idle stroke between the lever 27 and the pin or roller 40 of the rocker 42 which actuates the escapement before the arm 27 can strike the pin 40, the arm 27 is moved laterally by the cam block 49 to such an extent that it cannot strike the pin 40.

The 'consequence is that the ribbon shift,

but not the carriage escapement, is actuated through the arm 25 which actuates a laterally slidable intermediate lever 51 controlling the different colours. The lever 51 drives a toggle 53 through a pin and slot connection 52. The toggle transmits the motion to a ribbon lifter 54.

The ribbon feed which is; regulated by the universal bar 13, is effected by a pawl 55, which is movably mounted on the arm 26 i'xed on the shaft 22. The pawl 5 5 drives a ratchet wheel 56 and thereby drives the ribbon feed shaft 57. From the latter the ribbon spools are driven by bevel gearing.

To lock the keys, the locking arm 24, strikes a pin or bracket 58 on the locking slide 59, as soon as the latter is moved by the marginal stop 60, when the carriage reaches the marginal position. The universal bar 1.3 as well as the keys are thus locked against movement.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. In a carriage shift typewriter having carriage escapement, ribbon-shift and keylock actions, together with a key-mechanism including type-bar, escapement and ribbonshift actuating keys, a shiftable support for a part of the printing means, contact arms on said shiftable support for respectively actuating said escapement, ribbon-shift and key-lock actions, and contact arms on the machine frame actuated by the keys for operating the first-named arms, the coacting arms on the support and frame having contact faces inclined in the direction of the carriage case shifting movement and free for shifting movements over each other, Without interfering with their normal working relationship, in a carriage case shifting action.

2. In a carriage shift typewriter having carriage escapement, ribbon-shift, ribbonfeed and key-lock actions, together with a key-mechanism including type-bar, escapement and ribbon-shift actuating keys, means for transmitting motion between the parts of each action associated with the carriage and key-mechanism comprising a pair of motion transmitting arms respectively mounted on the carriage and-frame and having relative pivotal motion to transmit motion between the parts of each action and a relative sliding motion in a lane inclined in the direction of carriage s ifting movement to free the parts of the actions from each other during a casing shifting movement of the carriage.

3. In a carriage s hift typewriter having carriage escapement, ribbon-shift, ribbonfeed and key-lock actions, together with a key-mechanism including type-bar, escapement, ribbon-shift and accent keys, means for transmitting motion between the parts of each action associated with the carriage and key-mechanism comprising a pair of motion transmitting arms having relative pivotal motion to transmit motion between the parts of each action ,and a relative sliding motion to free the parts of the actions from each other during a case shifting motion of the carriage', one of the arms of the pair of escapement action motion transmitting arms being movable out of coacting relationship with the other arm thereof to render the capement inoperative when an accent key is struck without interference with the ribbon-shift and ribbon-feed ac- 5 tions.

4. A carriage shift typewriter embodying a frame, a platen-carna e, carriage-escape-- ment, ribbon-shift and ey-lock actions, a key-mechanism including type-bar, escape- 1o ment and ribbon-shift actuating keys, a

shiftable su port for the platen-carriage, arms on sai shiftable support for r tively actuating said escapement, rilicshift and key-lock actions, and a key-ac- 16 tuated arm on the machine frame for actuating each of the first-named arms and forming therewith a working couple, the arms of each y couple having surfaces in-l clined in thel directlon of carriage case shiftzo ing movement for permittingrelative movement thereof without a motion transmitting action thereby in a carriage shifting movement. 5. A typewriting machine according to 25 claim 1 including a pair of ribbon-feed keyactuated arms and wherein the key-actuated arm of the pair of arms for actuating the carriage escapement is pivotally mounted for lateral swinging movement out of oper- 30 ative relationship with its coacting arm on Vthe carriage when a silent key is struck so that the carriage escapement is rendered inoperative without interference with the ribbon-shift and ribbon-feed..

35 PAUL KPPLER.