GB1438667A – Photosensitive apparatus with movable light control means
– Google Patents
GB1438667A – Photosensitive apparatus with movable light control means
– Google Patents
Photosensitive apparatus with movable light control means
Info
Publication number
GB1438667A
GB1438667A
GB3151773A
GB3151773A
GB1438667A
GB 1438667 A
GB1438667 A
GB 1438667A
GB 3151773 A
GB3151773 A
GB 3151773A
GB 3151773 A
GB3151773 A
GB 3151773A
GB 1438667 A
GB1438667 A
GB 1438667A
Authority
GB
United Kingdom
Prior art keywords
light
movable member
bridge
sensitive
photo
Prior art date
1973-07-02
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
GB3151773A
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.)
Bottorf S F
Wards H F E
Original Assignee
Bottorf S F
Wards H F E
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.)
1973-07-02
Filing date
1973-07-02
Publication date
1976-06-09
1973-07-02
Application filed by Bottorf S F, Wards H F E
filed
Critical
Bottorf S F
1973-07-02
Priority to GB3151773A
priority
Critical
patent/GB1438667A/en
1976-06-09
Publication of GB1438667A
publication
Critical
patent/GB1438667A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
G—PHYSICS
G01—MEASURING; TESTING
G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infra-red, visible, or ultra-violet light
G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infra-red, visible, or ultra-violet light with attenuation or whole or partial obturation of beams of light
G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infra-red, visible, or ultra-violet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infra-red, visible, or ultra-violet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
G01D5/34776—Absolute encoders with analogue or digital scales
G01D5/34784—Absolute encoders with analogue or digital scales with only analogue scales or both analogue and incremental scales
G—PHYSICS
G01—MEASURING; TESTING
G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infra-red, visible, or ultra-violet light
G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infra-red, visible, or ultra-violet light with attenuation or whole or partial obturation of beams of light
G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infra-red, visible, or ultra-violet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
G—PHYSICS
G01—MEASURING; TESTING
G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
G01R17/02—Arrangements in which the value to be measured is automatically compared with a reference value
G01R17/06—Automatic balancing arrangements
Abstract
1438667 Using movable light control member with a photo-sensitive bridge control H F EDWARDS and S F BOTTORF 2 July 1973 31517/73 Heading G1A In a bridge control circuit 20 containing a condition-responsive (temperature) transducer 30 and a photo-sensitive device 34 receiving light from a source 36, that has not been obstructed by a movable member 42, the bridge is retroactively balanced by a meter 22 (fed by two amplifiers one, 24 sensitive to the current flowing through the bridge, the other, 26 sensitive to any unbalance) which is mechanically connected to the movable member 42 and thereby alters the amount of light falling on the photo-sensitive device until the bridge is balanced. The meter is calibrated prior to the connection of the condition-responsive transducer 30. The description discloses many forms that the movable member 42 can take. The common feature of most of the movable members is an opaque wedge or crescent shaped portion surrounded by a transparent portion, such as a segment of the curved surface of a cylinder as shown in Fig. 1 (and Figs. 3, 4 and 5 not shown) or such as a crescent on a disc (Figs. 8, 11, 12, 13 and 19 not shown). Two further embodiments are disclosed (Figs. 6, 7, 9, 10 not shown) which involve the light being reflected off the movable member with the movable member consisting of an opaque light absorbing central portion surrounded by a light reflecting portion.
GB3151773A
1973-07-02
1973-07-02
Photosensitive apparatus with movable light control means
Expired
GB1438667A
(en)
Priority Applications (1)
Application Number
Priority Date
Filing Date
Title
GB3151773A
GB1438667A
(en)
1973-07-02
1973-07-02
Photosensitive apparatus with movable light control means
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB3151773A
GB1438667A
(en)
1973-07-02
1973-07-02
Photosensitive apparatus with movable light control means
Publications (1)
Publication Number
Publication Date
GB1438667A
true
GB1438667A
(en)
1976-06-09
Family
ID=10324265
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3151773A
Expired
GB1438667A
(en)
1973-07-02
1973-07-02
Photosensitive apparatus with movable light control means
Country Status (1)
Country
Link
GB
(1)
GB1438667A
(en)
Cited By (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2328244A1
(en)
*
1975-10-16
1977-05-13
Keystone Int
ROTARY ELEMENT POSITION DETECTION AND CONTROL DEVICE
FR2590975A1
(en)
*
1985-11-29
1987-06-05
Pirelli Cavi Spa
POSITION OPTICAL SENSOR
WO2000028284A1
(en)
*
1998-11-05
2000-05-18
Daimlerchrysler Ag
Optical measuring device
1973
1973-07-02
GB
GB3151773A
patent/GB1438667A/en
not_active
Expired
Cited By (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR2328244A1
(en)
*
1975-10-16
1977-05-13
Keystone Int
ROTARY ELEMENT POSITION DETECTION AND CONTROL DEVICE
FR2590975A1
(en)
*
1985-11-29
1987-06-05
Pirelli Cavi Spa
POSITION OPTICAL SENSOR
GB2183827A
(en)
*
1985-11-29
1987-06-10
Pirelli Cavi Spa
Optical position sensor
GB2183827B
(en)
*
1985-11-29
1990-03-21
Pirelli Cavi Spa
Optical sensors
WO2000028284A1
(en)
*
1998-11-05
2000-05-18
Daimlerchrysler Ag
Optical measuring device
Similar Documents
Publication
Publication Date
Title
SE7607643L
(en)
1978-01-06
DEVICE FOR READING AN OPTICAL READABLE, REFLECTIVE INFORMATION STRUCTURE
ES458594A1
(en)
1978-10-01
Optical position sensor
GB1438667A
(en)
1976-06-09
Photosensitive apparatus with movable light control means
ES460838A1
(en)
1978-05-01
Composite transducer
CA952211A
(en)
1974-07-30
Photocell checking circuit for optical weighing scale
BE842894A
(en)
1976-12-13
FLOW CONTROL DEVICE
JPS5242167A
(en)
1977-04-01
Semiconductor pressure gauge
GB1422475A
(en)
1976-01-28
Electric exposure meter
GB1427988A
(en)
1976-03-10
Photographic exposure meter
SU605176A1
(en)
1978-04-30
Device for measuring velocities or specific flow rates by hydraulic-strain gauge technique
GB1453078A
(en)
1976-10-20
Transducer device with temperature compensation mechanical actuator having presettable positions
SU484543A1
(en)
1975-09-15
Crew metering device
GB1161468A
(en)
1969-08-13
An Electronic Precision Beam Balance
SU406167A1
(en)
1973-11-05
GB1363975A
(en)
1974-08-21
Anemometer
SU763710A1
(en)
1980-09-15
Method for calibrating barometric devices for measuring rate of change in altitude
SU608170A1
(en)
1978-05-25
Divider
BR7400236D0
(en)
1974-08-22
DIFFERENTIAL PRESSURE METER FOR POWER BALANCE
CH494948A
(en)
1970-08-15
Adjustment device on scales designed for serial weighing
JPS54946A
(en)
1979-01-06
Operation speed test circuit for logic element or logic circuit
SU594410A2
(en)
1978-02-25
Rate-of-flow meter
SU657253A1
(en)
1979-04-15
Conductive meter of velocity (flowrate)
SU530208A1
(en)
1976-09-30
Device for measuring the torque on the shaft
SU483132A1
(en)
1975-09-05
Device for automatic control of large grade in the original ore
GB1286792A
(en)
1972-08-23
Angle-reading device
Legal Events
Date
Code
Title
Description
1976-10-20
PS
Patent sealed
1988-02-17
PCNP
Patent ceased through non-payment of renewal fee
