GB715444A - Space protection by electro-magnetic waves - Google Patents

Space protection by electro-magnetic waves

Info

Publication number
GB715444A
GB715444A GB25764/52A GB2576452A GB715444A GB 715444 A GB715444 A GB 715444A GB 25764/52 A GB25764/52 A GB 25764/52A GB 2576452 A GB2576452 A GB 2576452A GB 715444 A GB715444 A GB 715444A
Authority
GB
United Kingdom
Prior art keywords
mirror
light
photo
lens
edge
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
GB25764/52A
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 GB715444A publication Critical patent/GB715444A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/12—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
    • F16P3/14—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
    • F16P3/147—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact using electro-magnetic technology, e.g. tags or radar
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/12—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
    • F16P3/14—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
    • F16P3/144—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact using light grids
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/08—Anamorphotic objectives
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
    • G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier
    • G08B13/184—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier using radiation reflectors

Abstract

715,444. Photo-electric ; machine guards. SICK, E. Oct. 14, 1952 [Oct. 19, 1951; Sept. 23, 1952], No. 25764/52. Class 40 (3). [Also in Group XXXVIII] In a device for protecting a space, e.g. the front of a machine against undesired entry of bodies (e.g. an operator's hand) the space to be protected is traversed by a beam of light or of ultra-short radio waves which is finally received by a photo-electric cell or radio receiver the path including a reflector which returns the beam along its path of incidence. As shown (Fig. 1) light from a source 1 is formed by a lens 3 on to an oscillating mirror 24 which traverses the beam of light along a trough shaped mirror 11. The beam is reflected from the trough on to a strip 16 consisting of a number of small reflectors which reflect the beam back along its path of incidence to the strip, on to the trough and again to the oscillating mirror which directs the beam on to an annular mirror surrounding lens 3 and from there to a photo-electric cell 28. Since the beam is interrupted intermittently, e.g. by an operator's arm the control circuit may include a quick-release slow-acting relay which will not close if the beam is anywhere interrupted. In an alternative arrangement (Fig. 3) light from source 54 is focused by a lens 57 through a translucent mirror 58 on to the edge between two faces of a rotating pentagonal mirror prism 60. This edge coincides with the focal line of a parabolic mirror 65 the total light reflected on to this mirror by the drum as it rotates being substantially constant. Light is reflected from the mirror through a cylindrical lens 68 which concentrates the beams on to reflex strips 71. The strips reflect the light back via the mirror and the rotating prism on to the translucent mirror 58 which directs it on to a photo-electric cell 72. In a further embodiment (not shown) light is directed on to the joining edge of a pair of mirrors rotating about an axis perpendicular to this edge so as to direct the light on to concave mirror of the type shown in Fig. 3.
GB25764/52A 1951-10-19 1952-10-14 Space protection by electro-magnetic waves Expired GB715444A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE715444X 1951-10-19

Publications (1)

Publication Number Publication Date
GB715444A true GB715444A (en) 1954-09-15

Family

ID=6626199

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25764/52A Expired GB715444A (en) 1951-10-19 1952-10-14 Space protection by electro-magnetic waves

Country Status (1)

Country Link
GB (1) GB715444A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211046A (en) * 1962-01-04 1965-10-12 Texas Instruments Inc Split image, high scanning rate optical system with constant aperture
US3411852A (en) * 1963-11-06 1968-11-19 Optical Coating Laboratory Inc Optical monitoring apparatus which includes a reflector system for focusing light ona sample and for receiving light reflected from the sample
US3436540A (en) * 1966-04-08 1969-04-01 Evr Eclairage Vehicules Rail Photo-electrical vehicle detecting device for traffic survey
FR2331777A1 (en) * 1975-11-11 1977-06-10 Sick Optik Elektronik Erwin ROTATING BEAM LIGHT CURTAIN
DE3134815A1 (en) * 1981-09-03 1983-03-24 Fa. Carl Zeiss, 7920 Heidenheim Area protection
GB2139792A (en) * 1983-04-02 1984-11-14 Mengele & Soehne Masch Karl A safety device for mechanical cabinets and similar equipment or machines
EP0220361A2 (en) * 1985-08-28 1987-05-06 Telenot Electronic GmbH Surface protection
DE3910840A1 (en) * 1989-04-04 1990-10-18 Schoenbuch Electronic Hanesch Device for scanning (sampling) and/or testing body surfaces
WO2007039595A1 (en) * 2005-10-06 2007-04-12 Robert Bosch Gmbh High-frequency monitoring system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211046A (en) * 1962-01-04 1965-10-12 Texas Instruments Inc Split image, high scanning rate optical system with constant aperture
US3411852A (en) * 1963-11-06 1968-11-19 Optical Coating Laboratory Inc Optical monitoring apparatus which includes a reflector system for focusing light ona sample and for receiving light reflected from the sample
US3436540A (en) * 1966-04-08 1969-04-01 Evr Eclairage Vehicules Rail Photo-electrical vehicle detecting device for traffic survey
FR2331777A1 (en) * 1975-11-11 1977-06-10 Sick Optik Elektronik Erwin ROTATING BEAM LIGHT CURTAIN
DE3134815A1 (en) * 1981-09-03 1983-03-24 Fa. Carl Zeiss, 7920 Heidenheim Area protection
GB2139792A (en) * 1983-04-02 1984-11-14 Mengele & Soehne Masch Karl A safety device for mechanical cabinets and similar equipment or machines
EP0220361A2 (en) * 1985-08-28 1987-05-06 Telenot Electronic GmbH Surface protection
EP0220361A3 (en) * 1985-08-28 1988-04-20 Telenot Electronic Gmbh Surface protection
DE3910840A1 (en) * 1989-04-04 1990-10-18 Schoenbuch Electronic Hanesch Device for scanning (sampling) and/or testing body surfaces
WO2007039595A1 (en) * 2005-10-06 2007-04-12 Robert Bosch Gmbh High-frequency monitoring system

Similar Documents

Publication Publication Date Title
US2769374A (en) Electrical light screen
GB715444A (en) Space protection by electro-magnetic waves
US4466739A (en) Laser beam alignment system
JPS5641088A (en) Monitoring device for laser light axis
JPS5595838A (en) Light beam aiming device for spectral camera
GB2166831A (en) Infra-red guard
GB1155544A (en) Improvements relating to Signal Receivers
US3671127A (en) Light beam range-finder
ES454819A1 (en) Device for the excitation of waves and especially ultrasonic waves including a cell
JPS5641091A (en) Welding method of pipe
US3813553A (en) Laser transciever
GB1273983A (en) Improvements in or relating to cutting sheet material
JPS55164818A (en) Camera having split type focal plane shutter
JPS56165937A (en) Optical recorder and reproducer
JPS5444582A (en) Smoke detector
RU1821312C (en) Technological material-cutting laser
ES369790A1 (en) Diaphragm for a laser amplifier chain
GB1459936A (en) Apparatus for illuminating minute targets
FR2020191A1 (en)
GB773881A (en) Improvements in or relating to optical reflectors
GB908030A (en) Improvements in or relating to range-finders
GB1132605A (en) New or improved optical system
GB690834A (en) Improvements in or relating to optical systems for use with photographic cameras
JPS52140348A (en) Optical device for photo-processing
SU362217A1 (en) OPTICAL MONITORING DEVICE