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GB716445A - Improvements in and relating to an electrical warning device - Google Patents

Improvements in and relating to an electrical warning device

Info

Publication number
GB716445A
GB716445A GB7918/52A GB791852A GB716445A GB 716445 A GB716445 A GB 716445A GB 7918/52 A GB7918/52 A GB 7918/52A GB 791852 A GB791852 A GB 791852A GB 716445 A GB716445 A GB 716445A
Authority
GB
United Kingdom
Prior art keywords
relating
warning device
march
tube
spectacle frame
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
GB7918/52A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB716445A publication Critical patent/GB716445A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C11/00—Non-optical adjuncts; Attachment thereof
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C5/00—Constructions of non-optical parts
    • G02C5/001—Constructions of non-optical parts specially adapted for particular purposes, not otherwise provided for or not fully classifiable according to technical characteristics, e.g. therapeutic glasses

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Optics & Photonics (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

716,445. Gravity switches. SCHLATTNER, W. March 27, 1952 [March 29, 1951; May 18, 1951; Sept. 29, 1951], No. 7918/52. Class 38(5) [Also in Group VI] A device, adapted tc complete an alarm circuit should a driver or other person become sleepy sc that his head tilts forward, consists of a tube 2 containing a mercury globule 5 and a pair of contacts 3 and provided with clips 10 or other means for attachment to a spectacle frame or other headgear. The tube may have internal helical ribs to retard movement of the globule and may be adjustably mounted in the temple of a spectacle frame, Fig. 7 (not shown).
GB7918/52A 1951-03-29 1952-03-27 Improvements in and relating to an electrical warning device Expired GB716445A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE716445X 1951-03-29

Publications (1)

Publication Number Publication Date
GB716445A true GB716445A (en) 1954-10-06

Family

ID=6626417

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7918/52A Expired GB716445A (en) 1951-03-29 1952-03-27 Improvements in and relating to an electrical warning device

Country Status (1)

Country Link
GB (1) GB716445A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3045225A (en) * 1958-07-28 1962-07-17 Carroll F Baldwin Sleep preventing device
US3208062A (en) * 1962-09-12 1965-09-21 Howard P Gregory Signal devices for alerting purposes
US4272764A (en) * 1980-01-14 1981-06-09 Oliver A. Miller Self contained head mountable sleep inhibiting device
WO1984004882A1 (en) * 1983-06-06 1984-12-20 Matthias Weiss Device for generating electronic signals
GB2146468A (en) * 1983-08-18 1985-04-17 Swyer Gerald Isaac M Monitoring attention
GB2227365A (en) * 1988-12-24 1990-07-25 Edward Alasdair Charles Level detector
GB2346476A (en) * 1999-02-05 2000-08-09 Rodney John Henry Hudson Sleep detector
EP1983364A1 (en) * 2007-04-18 2008-10-22 National Yang-Ming University Sunglass Type Sleep Detecting and Preventing Device
FR2915815A1 (en) * 2007-05-03 2008-11-07 Richard Chene Contact device e.g. spectacles bows, for use in contact with bodily zone of carrier, has sensor for controlling on/off switch of electronic equipment towards stop position when device passes from port location to non-port location

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3045225A (en) * 1958-07-28 1962-07-17 Carroll F Baldwin Sleep preventing device
US3208062A (en) * 1962-09-12 1965-09-21 Howard P Gregory Signal devices for alerting purposes
US4272764A (en) * 1980-01-14 1981-06-09 Oliver A. Miller Self contained head mountable sleep inhibiting device
WO1984004882A1 (en) * 1983-06-06 1984-12-20 Matthias Weiss Device for generating electronic signals
GB2146468A (en) * 1983-08-18 1985-04-17 Swyer Gerald Isaac M Monitoring attention
GB2227365A (en) * 1988-12-24 1990-07-25 Edward Alasdair Charles Level detector
GB2227365B (en) * 1988-12-24 1992-09-02 Edward Alasdair Charles Level detector
GB2346476A (en) * 1999-02-05 2000-08-09 Rodney John Henry Hudson Sleep detector
EP1983364A1 (en) * 2007-04-18 2008-10-22 National Yang-Ming University Sunglass Type Sleep Detecting and Preventing Device
FR2915815A1 (en) * 2007-05-03 2008-11-07 Richard Chene Contact device e.g. spectacles bows, for use in contact with bodily zone of carrier, has sensor for controlling on/off switch of electronic equipment towards stop position when device passes from port location to non-port location

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