GB1434630A - Security devices for copying apparatus - Google Patents

Security devices for copying apparatus

Info

Publication number
GB1434630A
GB1434630A GB4659973A GB4659973A GB1434630A GB 1434630 A GB1434630 A GB 1434630A GB 4659973 A GB4659973 A GB 4659973A GB 4659973 A GB4659973 A GB 4659973A GB 1434630 A GB1434630 A GB 1434630A
Authority
GB
United Kingdom
Prior art keywords
coils
platen cover
circuit
pair
platen
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
GB4659973A
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.)
Hoechst AG
Original Assignee
Hoechst AG
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 Hoechst AG filed Critical Hoechst AG
Publication of GB1434630A publication Critical patent/GB1434630A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/02—Counting the number of copies; Billing

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Electrophotography Configuration And Component (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Holders For Sensitive Materials And Originals (AREA)
  • Counters In Electrophotography And Two-Sided Copying (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)

Abstract

1434630 Copy counting HOECHST AG 5 Oct 1973 [9 Oct 1972] 46599/73 Heading G2A In a photo-copier having a flexible or rigid platen cover, the closing of a switch (to activate a circuit for counting the number of copies made of a single original) is effected by the formation of a circuit, when the platen cover is in copying position, including at least one pair of electrically connected flat induction coils concealed in the platen cover and corresponding transformer-forming coils concealed in the copier body. As shown, the platen cover 4 contains a single pair of coils 6 and 7 forming transformers with coils 8 and 9 respectively adjacent platen 2. Alternatively Fig. 4 (not shown), the platen cover may include two separate pairs of coils connected via an intermediate pair of coils in the copier body. The circuit also includes a generator (comprising oscillator and amplifier), receiver (comprising amplifier and frequency filter), rectifier and relay Fig. 2 (not shown).
GB4659973A 1972-10-09 1973-10-05 Security devices for copying apparatus Expired GB1434630A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2249408A DE2249408C3 (en) 1972-10-09 1972-10-09 Safety device

Publications (1)

Publication Number Publication Date
GB1434630A true GB1434630A (en) 1976-05-05

Family

ID=5858541

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4659973A Expired GB1434630A (en) 1972-10-09 1973-10-05 Security devices for copying apparatus

Country Status (6)

Country Link
US (1) US3885166A (en)
JP (1) JPS5641982B2 (en)
DE (1) DE2249408C3 (en)
FR (1) FR2202601A5 (en)
GB (1) GB1434630A (en)
NL (1) NL7313405A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK136230B (en) * 1974-10-15 1977-09-05 Zeuthen & Aagaard As Electrostatic copying machine with movable table for placing an original.
JPS54125640U (en) * 1978-02-23 1979-09-01
US4390267A (en) * 1982-02-22 1983-06-28 Eastman Kodak Company Bi-modal illumination apparatus
JP2006339044A (en) * 2005-06-02 2006-12-14 Inax Corp Apparatus with induction coil
US11078687B2 (en) 2017-05-18 2021-08-03 Homady Manufacturing Company Lockable firearm safe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2967267A (en) * 1958-03-26 1961-01-03 Litton Systems Inc Reactive intercoupling of modular units
US3020473A (en) * 1959-08-06 1962-02-06 United States Steel Corp Counting apparatus
US3533691A (en) * 1966-10-22 1970-10-13 Ricoh Kk Electrophotographic duplicator

Also Published As

Publication number Publication date
DE2249408B2 (en) 1975-01-09
AU6117373A (en) 1975-04-10
US3885166A (en) 1975-05-20
JPS5641982B2 (en) 1981-10-01
NL7313405A (en) 1974-04-11
JPS4974544A (en) 1974-07-18
DE2249408C3 (en) 1975-11-06
FR2202601A5 (en) 1974-05-03
DE2249408A1 (en) 1974-05-02

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee