JPS547960A - Instrument for measuring optical center of glasses - Google Patents

Instrument for measuring optical center of glasses

Info

Publication number
JPS547960A
JPS547960A JP7226178A JP7226178A JPS547960A JP S547960 A JPS547960 A JP S547960A JP 7226178 A JP7226178 A JP 7226178A JP 7226178 A JP7226178 A JP 7226178A JP S547960 A JPS547960 A JP S547960A
Authority
JP
Japan
Prior art keywords
glasses
instrument
optical center
measuring optical
measuring
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.)
Pending
Application number
JP7226178A
Other languages
English (en)
Inventor
Gurooruman Baanaado
Deii Richiyaazu Uiriamu
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.)
American Optical Corp
Original Assignee
American Optical 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
Application filed by American Optical Corp filed Critical American Optical Corp
Publication of JPS547960A publication Critical patent/JPS547960A/ja
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/403—Bus networks with centralised control, e.g. polling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40006—Architecture of a communication node
JP7226178A 1977-06-17 1978-06-16 Instrument for measuring optical center of glasses Pending JPS547960A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/807,467 US4149030A (en) 1977-06-17 1977-06-17 Multi-drop communications device

Publications (1)

Publication Number Publication Date
JPS547960A true JPS547960A (en) 1979-01-20

Family

ID=25196440

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7226178A Pending JPS547960A (en) 1977-06-17 1978-06-16 Instrument for measuring optical center of glasses

Country Status (4)

Country Link
US (1) US4149030A (ja)
JP (1) JPS547960A (ja)
CA (1) CA1096478A (ja)
DE (1) DE2826017A1 (ja)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4272843A (en) * 1978-06-13 1981-06-09 Licentia Patent-Verwaltungs-G.M.B.H System for transmitting service communications
DK143627C (da) * 1978-10-30 1982-02-15 Rovsing A S Koblingskreds til overfoering af datasignaler med stor hastighed
WO1980002631A1 (en) * 1979-05-14 1980-11-27 Diantek Hb Data transmission arrangement
CA1123102A (en) * 1979-07-27 1982-05-04 Harold H. Harris Line interface unit for voice and wide band signal coupling
US4337465A (en) * 1980-09-25 1982-06-29 Burroughs Corporation Line driver circuit for a local area contention network
DE3218146A1 (de) * 1982-05-14 1983-11-24 Martin, Helmut, Dr.-Ing., 3000 Hannover Lokales netzwerk fuer hohe uebertragungsraten
US4475186A (en) * 1982-07-28 1984-10-02 The United States Of America As Represented By The Secretary Of The Army Multiplexed noise coded switching system
US4625077A (en) * 1984-07-10 1986-11-25 International Anasazi, Inc. Telephone bridge method and apparatus
US4987586A (en) * 1987-07-31 1991-01-22 Compaq Computer Corporation Modem-telephone interconnect
FR2705004B1 (fr) * 1993-05-04 1995-07-21 Sagem Télécopieur avec dispositif d'écoute, sous haute impédance, de ligne téléphonique.
US6111524A (en) * 1995-11-09 2000-08-29 Vehicle Enhancement Systems, Inc. Systems and methods for identifying tractor/trailers and components thereof
US6314481B1 (en) * 1999-01-19 2001-11-06 Phoenix Logistics, Inc. Resistance integrated coupler between databus and terminal device having databus windings with high resistance wire with resistance being 1.5 times databus cable nominal characteristic impedance
GB2413746B (en) 2004-05-01 2007-02-14 Abb Offshore Systems Ltd Modem

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3754196A (en) * 1972-02-17 1973-08-21 Ncr Communications bridge for impedance matching of a plurality of lines
US3906167A (en) * 1973-07-17 1975-09-16 Thaddeous J Baker Constant current powered telephone circuits
US3899637A (en) * 1974-02-08 1975-08-12 Westinghouse Electric Corp Frequency shift keyed communications device
US3872408A (en) * 1974-05-03 1975-03-18 Lindsay Specialty Prod Ltd Signal directional tap
US3983324A (en) * 1975-03-31 1976-09-28 Burroughs Corporation Full duplex driver/receiver
US4056689A (en) * 1977-01-05 1977-11-01 Bell Telephone Laboratories, Incorporated Telephone subscriber line circuit

Also Published As

Publication number Publication date
CA1096478A (en) 1981-02-24
US4149030A (en) 1979-04-10
DE2826017A1 (de) 1979-01-04

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