GB635916A - Typewriting machine - Google Patents

Typewriting machine

Info

Publication number
GB635916A
GB635916A GB1444547A GB1444547A GB635916A GB 635916 A GB635916 A GB 635916A GB 1444547 A GB1444547 A GB 1444547A GB 1444547 A GB1444547 A GB 1444547A GB 635916 A GB635916 A GB 635916A
Authority
GB
United Kingdom
Prior art keywords
levers
type
actuators
spring
power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1444547A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Underwood Corp
Original Assignee
Underwood Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US635916XA priority Critical
Priority to US243835A priority patent/US2254764A/en
Application filed by Underwood Corp filed Critical Underwood Corp
Publication of GB635916A publication Critical patent/GB635916A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, e.g. INK-JET PRINTERS, THERMAL PRINTERS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J23/00Power drives for actions or mechanisms
    • B41J23/02Mechanical power drives
    • B41J23/04Mechanical power drives with driven mechanism arranged to be clutched to continuously- operating power source
    • B41J23/06Mechanical power drives with driven mechanism arranged to be clutched to continuously- operating power source by snatch rolls

Abstract

635,916. Typewriters. UNDERWOOD CORPORATION. May 30, 1947, No. 14445. Convention date, Dec. 3; 1938. [Class 100 (iv)] In a power-driven typewriter of the kind having a semi-circular array of type levers which are spring-urged towards inoperative positions and are connected to their operating levers at graded lengths from the pivots of said levers and having selectively operated pusher actuators arranged in a straight row adjacent a continuously-operating power source associated with the type-levers, the actuators 34 are normally spring-held against a stationary abutment 35 free from the power source 38 and have vertical arms 28 pivoted thereto which are in individually formed rolling contact with their associated type-bar operating levers 21 to transmit, when operated, equal power movements to the type bars. The actuators 34 are selected by the key levers 41 by the engagement of a hooked member 69 with a projection 52 on the actuators 34 and upon depression a pawl 37 on the end of actuator 34, held by gravity in an anticlockwise direction, is engaged by the power drive 38. A spring 36 ensures that there is no movement of actuator 34 until good contact is made between parts 37, 38 and until the pawl 37 is halted by a stop 56. The spring also causes immediate return of the actuator to normal position in advance of and independently of the return of the type-bars 11 and operating lever 21 to normal positions. The levers 21 are mounted on a straight axis 23 and connected to the type-lever 11 by connecting- rods 19, and the points of connection 26 at graded lengths from the axis 23 lie on a vertical arc in front of an arc along which the links 19 are connected to the type-bars 11. Each lever 21 has a differently-shaped contacting surface 68 so that the action of the parts 28, 34 thereon in combination with the varying leverages of levers 21 ensures that equal power is given to the typebars. Disengagement of the actuators 34 from the power drive 38 is effected by surfaces 58 engaging a head 59 of individually adjustable screws mounted in a universal bar 60. Bar 60 is carried on pivoting arms 61, 62 so that the power imparted to all actuators 34 can be simultaneously adjusted by movement of the arms about a pivot 23 against the tension of a spring 66 and adjustably positioned by the rotation of an eccentric 64 attached to a dial control 65. Ink-ribbon feeds and vibrator mechanism. Extensions 75 of the levers 21 are of varying length to compensate for their differing angular movements and impart a constant movement to the universal bar 74 connected to the ribbon mechanism. Tongues 72 on the bar 74 are bendable to compensate for small differences in the throw of the levers 75.
GB1444547A 1938-12-03 1947-05-30 Typewriting machine Expired GB635916A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US635916XA true 1938-12-03 1938-12-03
US243835A US2254764A (en) 1938-12-03 1938-12-03 Typewriting machine

Publications (1)

Publication Number Publication Date
GB635916A true GB635916A (en) 1950-04-19

Family

ID=26743554

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1444547A Expired GB635916A (en) 1938-12-03 1947-05-30 Typewriting machine

Country Status (2)

Country Link
US (1) US2254764A (en)
GB (1) GB635916A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1074598B (en) * 1954-01-04

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2474741A (en) * 1945-07-27 1949-06-28 Royal Typewriter Co Inc Power-operated typing mechanism for typewriters or like machines
US2525278A (en) * 1947-09-12 1950-10-10 Underwood Corp Power-driven type action
US2567943A (en) * 1949-08-16 1951-09-18 Royal Typewriter Co Inc Mechanism for varying the tension of normalizing springs of typewriters or like machines
US2818152A (en) * 1954-11-19 1957-12-31 Underwood Corp Impression control for typewriting machine
DE1105887B (en) * 1954-11-19 1961-05-04 Underwood Corp Type lever gear for electrically driven typewriters
NL107252C (en) * 1959-09-09
US3482671A (en) * 1968-01-03 1969-12-09 Scm Corp Back space mechanism for typewriters and like machines
US3638775A (en) * 1969-01-08 1972-02-01 Brother Ind Ltd Repeat action mechanism for power-operated typewriters
US3913720A (en) * 1974-11-21 1975-10-21 Reilly Thomas B O Typewriter with yieldable type bar

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1074598B (en) * 1954-01-04

Also Published As

Publication number Publication date
US2254764A (en) 1941-09-02

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