GB228116A - Improved apparatus for producing perforated written matter - Google Patents

Improved apparatus for producing perforated written matter

Info

Publication number
GB228116A
GB228116A GB29360/24A GB2936024A GB228116A GB 228116 A GB228116 A GB 228116A GB 29360/24 A GB29360/24 A GB 29360/24A GB 2936024 A GB2936024 A GB 2936024A GB 228116 A GB228116 A GB 228116A
Authority
GB
United Kingdom
Prior art keywords
lead
pen
switch
pencil
box
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
GB29360/24A
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.)
BREV ELETTROGRAPH
Original Assignee
BREV ELETTROGRAPH
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 BREV ELETTROGRAPH filed Critical BREV ELETTROGRAPH
Publication of GB228116A publication Critical patent/GB228116A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B26HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26FPERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/26Perforating by non-mechanical means, e.g. by fluid jet
    • B26F1/28Perforating by non-mechanical means, e.g. by fluid jet by electrical discharges

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)

Abstract

228,116. Brevetti Elettrograph, S. A. S., (Assignees of Barbieri, A.). Jan. 25, 1924, [Convention date]. Electric pens and pencils; reservoir pens.-To prevent alteration of matter written by a pen or pencil, the matter is perforated during writing by electric sparks passing between the pen or pencil and a metal plate supporting the paper or other material written upon. Figs. 1 and 2 show apparatus for connection by a plug 17 to alternating or direct current supply. A casing 14 on a base plate 1 contains a rheostat 15, a Ruhmkorff coil 21. a make-and-break switch 16. and a condenser 20. The casing is provided on the outside with a knob 6 and indicator 2 for controlling the rheostat, a switch 3 co-operating with integral contacts 17, 18, 19, and a safety spark gap 4 connecting with internal contacts 22. Terminals 13 are connected by a lead 10 to a box 9 provided with projecting arms 8, a press-button switch 11, and a lead 12 for attachment to a pen or pencil, which is normally supported in the arms 8 and holds down the switch 11 to break the circuit. The metal plate for supporting the paper is mounted on an insulating base provided with two contact studs for connection to the arms 8 of the box 9, one stud being connected by a lead to the metal plate. Fig. 3 shows a stylographic pen comprising a reservoir 29 of insulating material, a metal writing point 25 in a metal end piece 27, a finger-piece 28 of insulating material, and a cap 31 of insulating material provided with a vent hole 33 and enclosing a spring contact 32 making electric connection between the lead 12 from the box 9 and the writing point 25.
GB29360/24A 1924-01-25 1924-12-06 Improved apparatus for producing perforated written matter Expired GB228116A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT228116X 1924-01-25

Publications (1)

Publication Number Publication Date
GB228116A true GB228116A (en) 1925-10-15

Family

ID=11200701

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29360/24A Expired GB228116A (en) 1924-01-25 1924-12-06 Improved apparatus for producing perforated written matter

Country Status (1)

Country Link
GB (1) GB228116A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125052A (en) * 1964-03-17 Thread-chain cutter for sewing machines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125052A (en) * 1964-03-17 Thread-chain cutter for sewing machines

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