NO138162B - PLATE-SHAPED INFORMATION CARRIER AND DEVICE FOR READING THIS - Google Patents

PLATE-SHAPED INFORMATION CARRIER AND DEVICE FOR READING THIS Download PDF

Info

Publication number
NO138162B
NO138162B NO740/72A NO74072A NO138162B NO 138162 B NO138162 B NO 138162B NO 740/72 A NO740/72 A NO 740/72A NO 74072 A NO74072 A NO 74072A NO 138162 B NO138162 B NO 138162B
Authority
NO
Norway
Prior art keywords
trawl door
trawl
door
reading
plate
Prior art date
Application number
NO740/72A
Other languages
Norwegian (no)
Other versions
NO138162C (en
Inventor
Gijsbertus Bouwhuis
Original Assignee
Philips Nv
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 Philips Nv filed Critical Philips Nv
Publication of NO138162B publication Critical patent/NO138162B/en
Publication of NO138162C publication Critical patent/NO138162C/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/7605—Television signal recording on discs or drums
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1365—Separate or integrated refractive elements, e.g. wave plates
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24085—Pits
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1372—Lenses
    • G11B2007/13727—Compound lenses, i.e. two or more lenses co-operating to perform a function, e.g. compound objective lens including a solid immersion lens, positive and negative lenses either bonded together or with adjustable spacing

Description

Tråldør. Trawl door.

Den foreliggende oppfinnelse vedrører en tråldør, særlig for trål av den art som skal føres gjennom sjøen i avstand fra bunnen (såkalt flytetrål), hvor tråldøren inneholder hulrom som kan fylles med luft av et avpasset trykk for derved å innstille tråldøren til å ha en avpasset opp-drift. The present invention relates to a trawl door, in particular for trawls of the kind that are to be carried through the sea at a distance from the bottom (so-called floating trawl), where the trawl door contains cavities that can be filled with air of a suitable pressure in order thereby to set the trawl door to have a suitable up-drive.

Det er foreslått en slik tråldør med et hulrom som kan fylles med luft, hvor tråldørens gange i sjøen kan innstilles ved hjelp av en innstillbar finne. Such a trawl door has been proposed with a cavity that can be filled with air, where the trawl door's movement in the sea can be adjusted using an adjustable fin.

Hensikten med oppfinnelsen er å kom-me frem til en tråldør som kan innstilles og stabiliseres i sjøen uten bruk av finner og liknende foranstaltninger. Dette er oppnådd ifølge oppfinnelsen ved at hulrommet, som bare strekker seg over en del av tråldøren, er plasert ved midten av tråldøren og omgis fortil og baktil av en massiv konstruksjon. The purpose of the invention is to arrive at a trawl door that can be adjusted and stabilized in the sea without the use of fins and similar measures. This is achieved according to the invention in that the cavity, which only extends over part of the trawl door, is placed at the center of the trawl door and is surrounded at the front and rear by a massive construction.

Oppfinnelsen vil bli nærmere beskre-vet i det etterfølgende under henvisning til de medfølgende tegninger, hvor: Fig. 1 viser tråldøren ifølge oppfinnelsen, sett fra siden og delvis gjennom-snittet. Fig. 2 viser tråldøren ifølge fig. 1, sett ovenfra. Fig. 3 viser et snitt etter linjen V—V i fig. 3, forenklet. The invention will be described in more detail in what follows with reference to the accompanying drawings, where: Fig. 1 shows the trawl door according to the invention, seen from the side and partially in cross-section. Fig. 2 shows the trawl door according to fig. 1, top view. Fig. 3 shows a section along the line V—V in fig. 3, simplified.

Tråldøren ifølge oppfinnelsen inneholder på i og for seg kjent måte en stål-sko 20 ved bunnen, hvortil det slutter seg en omgivende ramme 21. Denne ramme er fortil og baktil utfylt med massive tre-planker 22, som holdes på plass med so-lide ankerbolter 23, som løper fra topp-staven i rammen og ned til stålskoen. Nær venstre forende er en solid bøyleformet svingearm 24 festet med to hengselstyk-ker 25 til tråldøren; denne svingearm en-der i et øye 26 hvori det er opptatt den ene ende av en kjetting 27; hvis annen ende over en sjakkel 28 er festet i et øye 29 fastgjort i nærheten av tråldørens høyre ende. Trålimen opptas i øyet 26, og tråldørens stilling i sjøen innstilles ved å innstille lengden av kjettingen 27. På den annen side av tråldøren befinner det seg to øyer 30, 31, et øye 30 oventil og et øye 31 nedentil. Disse øyer befinner seg på linje med øyet 29 og er beregnet på å opp-ta linene fra henholdsvis overtelnen og undertelnen. The trawl door according to the invention contains, in a manner known per se, a steel shoe 20 at the bottom, to which a surrounding frame 21 joins. anchor bolts 23, which run from the top rod in the frame down to the steel shoe. Near the left front end, a solid hoop-shaped swing arm 24 is attached with two hinge pieces 25 to the trawl door; this swing arm ends in an eye 26 in which one end of a chain 27 is engaged; whose other end above a shackle 28 is fixed in an eye 29 fixed near the right end of the trawl door. The trawl glue is taken up in the eye 26, and the position of the trawl door in the sea is adjusted by adjusting the length of the chain 27. On the other side of the trawl door there are two eyes 30, 31, an eye 30 above and an eye 31 below. These islands are located in line with the eye 29 and are intended to take up the lines from the upper tent and the lower tent respectively.

Den opptegnete utførelse svarer til styrbord tråldør; for babords tråldør er utførelsen speilbildet av det opptegnete. The recorded design corresponds to the starboard trawl door; for the port trawl door, the design is the mirror image of what was recorded.

På midten av tråldøren er det en solid jernkonstruksjon som består av to vertikale plater 32, 33 som løper i flukt med tråldørens yttersider og holdes i avstand fra hverandre av to andre vertikale plater 34, 35. Herved dannes to kanaler 36, 37 som opptar endene på treplankene 22. Oventil er det en topplate 38 som sammen med platene 32, 33, 34, 35 avgrenser et lukket rom 39 som er avstivet av en sentral plate 41. Nedentil er platene 32—35 fast-sveiset til stålskoen, og i denne er det ut-tatt en åpning 42, som er åpen ut mot sjøen. In the middle of the trawl door there is a solid iron construction consisting of two vertical plates 32, 33 which run flush with the outer sides of the trawl door and are kept at a distance from each other by two other vertical plates 34, 35. This forms two channels 36, 37 which occupy the ends on the wooden planks 22. Above, there is a top plate 38 which, together with the plates 32, 33, 34, 35, defines a closed space 39 which is braced by a central plate 41. Below, the plates 32-35 are welded to the steel shoe, and in this an opening 42 has been taken out, which is open to the sea.

Oventil leder det inn en rørstuss 43 inn til hulrommet 39. Denne danner til-koblingsstuss for en ikke vist trykkluft-slange. Above, a pipe connection 43 leads into the cavity 39. This forms a connection connection for a compressed air hose, not shown.

Ved den hittil beskrevne utførelse har det vist seg, at når man slipper tråldøren ned i sjøen, vil det bli innesluttet en tem-melig godt avpasset luftmengde i hulrommet 39. Denne luftmengde vil bli trykket sammen og trengt opp mot toppen av hulrommet, etterhvert som tråldøren syn-ker ned i sjøen. Det viser seg nå for det første, at dette hulrom 39 stabiliserer trål-døren, slik at den får en stødigere gang enn ellers, for det annet at man med et manometer kan avlese trykket i hulrom-mets indre og derved på en enkel måte avlese tråldørens dypgående, og for det tred-je at man ved kontrollert tilførsel av trykkluft kan bringe tråldøren til å innstille seg i nøyaktig riktig dybde. With the design described so far, it has been shown that when the trawl door is dropped into the sea, a fairly well-suited amount of air will be trapped in the cavity 39. This amount of air will be compressed and pushed up towards the top of the cavity, as the trawl door sinks into the sea. It now turns out, firstly, that this cavity 39 stabilizes the trawl door, so that it has a more steady movement than otherwise, and secondly, that you can read the pressure inside the cavity with a manometer and thereby read in a simple way the depth of the trawl door, and thirdly, that by controlled supply of compressed air, the trawl door can be adjusted to exactly the right depth.

Alt etter det som ønskes kan nå ha en lufttilførsel til hver tråldør. Depending on what is desired, each trawl door can now have an air supply.

En ytterligere mulighet er å innstille den ene tråldør slik at luftmengden i bare en viss del av hulrommene innesluttes, så at denne innstiller seg på en viss dypgående, mens den annen tråldør etterinn-stilles ved tilførsel av trykkluft. Denne siste måte har vært forsøkt i praksis, og det har vist seg at selv med denne rela-tivt ufullkomne utførelse får man ve-sentlig bedre muligheter for å innstille tråldørene riktig i forhold til hverandre og til trålen. Innstillingen av den tråldør som ikke tilføres trykkluft, oppnåes i dette tilfelle ved at man på ikke vist måte åp-ner for vanninntaksåpninger som ligger i avpasset nivå. A further possibility is to adjust one trawl door so that the amount of air in only a certain part of the cavities is enclosed, so that it adjusts to a certain draft, while the other trawl door is readjusted by supplying compressed air. This last method has been tried in practice, and it has been shown that even with this relatively imperfect design, you get significantly better opportunities to set the trawl doors correctly in relation to each other and to the trawl. The setting of the trawl door which is not supplied with compressed air is achieved in this case by opening the water intake openings in a manner not shown which are at the adjusted level.

Claims (1)

Tråldør, særlig for trål av den art som skal føres gjennom sjøen i avstand fra bunnen (såkalt flytetrål), hvor tråldøren inneholder hulrom som kan fylles med luft av et avpasset trykk for derved å innstille tråldøren til å ha en avpasset opp-drift, karakterisert ved at hulrommet, som bare strekker seg over en del av tråldøren, er plassert ved midten av trål-døren og omgis fortil og baktil av en massiv konstruksjon.Trawl door, in particular for trawls of the kind that are to be carried through the sea at a distance from the bottom (so-called floating trawl), where the trawl door contains cavities that can be filled with air of a suitable pressure to thereby set the trawl door to have a suitable buoyancy, characterized in that the cavity, which only extends over part of the trawl door, is located at the center of the trawl door and is surrounded at the front and rear by a massive construction.
NO740/72A 1971-03-11 1972-03-08 PLATE-SHAPED INFORMATION CARRIER AND DEVICE FOR READING THIS NO138162C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7103233A NL7103233A (en) 1971-03-11 1971-03-11

Publications (2)

Publication Number Publication Date
NO138162B true NO138162B (en) 1978-04-03
NO138162C NO138162C (en) 1978-07-12

Family

ID=19812661

Family Applications (1)

Application Number Title Priority Date Filing Date
NO740/72A NO138162C (en) 1971-03-11 1972-03-08 PLATE-SHAPED INFORMATION CARRIER AND DEVICE FOR READING THIS

Country Status (13)

Country Link
JP (1) JPS5213733B1 (en)
BE (1) BE780451A (en)
CA (1) CA953419A (en)
CH (1) CH558053A (en)
DK (1) DK133449B (en)
ES (2) ES400596A1 (en)
FR (1) FR2129626A5 (en)
GB (1) GB1387304A (en)
IT (1) IT952934B (en)
NL (1) NL7103233A (en)
NO (1) NO138162C (en)
SE (1) SE396493B (en)
ZA (1) ZA72928B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161752A (en) * 1977-06-28 1979-07-17 International Business Machines Corporation High density video disk having two pit depths
NL7803517A (en) * 1978-04-03 1979-10-05 Philips Nv RECORD CARRIER WITH AN OPTICALLY READABLE PHASE STRUCTURE AND DEVICE FOR READING.
FR2442487A2 (en) * 1978-11-21 1980-06-20 Thomson Brandt Automatic focussing for optical reading of video disc - using electromagnetic assembly with windings to control lens position
JPH0665950U (en) * 1991-07-22 1994-09-16 勉 宮崎 Optical reader
FR2750528A1 (en) * 1996-06-28 1998-01-02 Thomson Multimedia Sa OPTICAL DISC COMPATIBLE WITH TWO DIFFERENT READING SYSTEMS

Also Published As

Publication number Publication date
DK133449C (en) 1977-03-14
FR2129626A5 (en) 1972-10-27
CH558053A (en) 1975-01-15
IT952934B (en) 1973-07-30
SE396493B (en) 1977-09-19
BE780451A (en) 1972-09-11
ZA72928B (en) 1973-09-26
NO138162C (en) 1978-07-12
ES427857A1 (en) 1977-07-01
GB1387304A (en) 1975-03-12
DE2209761B2 (en) 1976-02-12
DK133449B (en) 1976-05-17
ES400596A1 (en) 1975-07-16
DE2209761A1 (en) 1972-09-21
NL7103233A (en) 1972-09-13
JPS5213733B1 (en) 1977-04-16
CA953419A (en) 1974-08-20

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