GB799137A - Improvements in contact keyboards for controlling typewriters and calculating, accounting and like machines - Google Patents

Improvements in contact keyboards for controlling typewriters and calculating, accounting and like machines

Info

Publication number
GB799137A
GB799137A GB29826/56A GB2982656A GB799137A GB 799137 A GB799137 A GB 799137A GB 29826/56 A GB29826/56 A GB 29826/56A GB 2982656 A GB2982656 A GB 2982656A GB 799137 A GB799137 A GB 799137A
Authority
GB
United Kingdom
Prior art keywords
lever
contact
frame
key
strip
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
GB29826/56A
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.)
Philips Electrologica GmbH
Original Assignee
Siemag Feinmechanische Werke GmbH
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
Application filed by Siemag Feinmechanische Werke GmbH filed Critical Siemag Feinmechanische Werke GmbH
Publication of GB799137A publication Critical patent/GB799137A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J23/00—Power drives for actions or mechanisms
    • B41J23/32—Electromagnetic power drives, e.g. applied to key levers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/44—Typewriters or selective printing mechanisms having dual functions or combined with, or coupled to, apparatus performing other functions
    • B41J3/50—Mechanisms producing characters by printing and also producing a record by other means, e.g. printer combined with RFID writer
    • B41J3/51—Mechanisms producing characters by printing and also producing a record by other means, e.g. printer combined with RFID writer the printed and recorded information being identical; using type elements with code-generating means

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)

Abstract

799,137. Typewriters &c. SIEMAG FEINMECHANISCHE WERKE, GES. Oct. 1, 1956 [Oct. 3, 1955], No. 29826/56. Class 100(4) A contact keyboard for controlling typewriters, calculating, accounting and like machines, in which striking a key makes a contact completing a circuit to a power drive which effects the desired operations, has a locking device which locks the struck key and contact in the operating position during the course of the function, positively unlocks both key and contact when the operation is carried out, and serves as a lock against the closing of a contact by a key which has not yet been returned to rest. Depressing key lever 66 causes frame 82 to be pushed anti-clockwise by contact operating lever 72 pressing on securing strip 86. Lever 72 pulled by spring 76 closes contacts 79 by pressing stud 96 when its recess is opposite locking bar 75. The mechanism is now locked as shown, ball locking strip 62 preventing the movement of further keys. Making contact 79 causes the desired function to be carried out, on completion of which electro-magnet 99 is energized and frame 73 is rocked anticlockwise. Frame 82 is spring-urged clockwise when lever 72 is pushed out of engagement with strip 86 by locking bar 75 on frame 73. The tip of lever 72 is now to the left of strip 86 and cannot remake contacts 79 if still held down by key lever 66. Frame 73 returns to its rest position when magnet 99 is de-energized, thus lifting bar 75 from its recess in lever 72 and freeing lever 72 for return when key lever 66 is released. In a modification bar 75 can be stationary and frame 73 shorter to bear on the tip of lever 72. Also, frame 82 and strip 86 may be replaced by pawls. Full stroke locking can be obtained by stepping the recess in lever 72. Noise-damping stops 64, 93, 77, 88, 89 are provided.
GB29826/56A 1955-10-03 1956-10-01 Improvements in contact keyboards for controlling typewriters and calculating, accounting and like machines Expired GB799137A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1172039X 1955-10-03
DE799137X 1955-10-03

Publications (1)

Publication Number Publication Date
GB799137A true GB799137A (en) 1958-08-06

Family

ID=25948604

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29826/56A Expired GB799137A (en) 1955-10-03 1956-10-01 Improvements in contact keyboards for controlling typewriters and calculating, accounting and like machines

Country Status (1)

Country Link
GB (1) GB799137A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3227820A (en) * 1963-12-04 1966-01-04 Carling Electric Inc Switch button structure and array

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3227820A (en) * 1963-12-04 1966-01-04 Carling Electric Inc Switch button structure and array

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