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GB751224A - Velocity-dependent measuring and control systems - Google Patents

Velocity-dependent measuring and control systems

Info

Publication number
GB751224A
GB751224A GB37454A GB37454A GB751224A GB 751224 A GB751224 A GB 751224A GB 37454 A GB37454 A GB 37454A GB 37454 A GB37454 A GB 37454A GB 751224 A GB751224 A GB 751224A
Authority
GB
United Kingdom
Prior art keywords
relay
photo
light
cell
condenser
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
GB37454A
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
Priority to FR1094623D priority Critical patent/FR1094623A/fr
Priority to DEF10809A priority patent/DE923274C/en
Application filed by Individual filed Critical Individual
Priority to GB37454A priority patent/GB751224A/en
Publication of GB751224A publication Critical patent/GB751224A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/07—Indicating devices, e.g. for remote indication
    • G01P1/08—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
    • G01P1/10—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds
    • G01P1/103—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds by comparing the value of the measured signal with one or several reference values
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
    • B61K7/00—Railway stops fixed to permanent way; Track brakes or retarding apparatus fixed to permanent way; Sand tracks or the like
    • B61K7/02—Track brakes or retarding apparatus
    • B61K7/12—Track brakes or retarding apparatus electrically controlled
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/64—Devices characterised by the determination of the time taken to traverse a fixed distance
    • G01P3/68—Devices characterised by the determination of the time taken to traverse a fixed distance using optical means, i.e. using infrared, visible, or ultraviolet light

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

751,224. Indicating speed photo-electrically. FRUNGEL, F. Jan. 6, 1954, No. 374/54. Class 40 (3). Apparatus for effecting a control at a particular velocity comprises an elongated source of modulated light at one side of a path of travel and a light actuated receiving device including a photo-cell on the other side of the travel and a relay receiving the photo-cell output pulses and activated only when the light is interrupted by a body passing through the beam at above a predetermined velocity. As shown, a relay is to be operated when a railway truck 11 passes in front of a modulated light. source at an excessive speed. The light source is a fluorescent lamp 10 a section 10a of which is viewed by a photo-electric cell situuated behind a lens and an angle limiting diaphragm 14. The pulsed output of the photocell 16 is amplified in a tube 19 and fed through an anode transformer, .the secondary of which is tuned, to a rectifier 21, which feeds a condenser 22 and resistor 23 in parallel. Provided the light reaching the cell is not interrupted a steady potential is built up across the condenser which is prevented by a blocking condenser 24 from reaching a winding of a relay 26. If a truck passes through the light beam however the potential across the condenser falls and the charge on blocking condenser 24 leaks away the resulting current through relay winding 26 operating the relay. The relay may be present to operate at a particular speed by means of a preadjusted backing off current in a differential winding. Variations in the light source intensity are compensated by means of a correcting voltage derived from the output of transformer 16, rectified at 32 and passed through a long time constant circuit to control the grid potential of tube 19. A number of photo-cells may be arranged to control a single relay if a truck passes any of them at above the predetermined speed. In the arrangement of (Fig. 4, not shown) all the blocking condensers 30 are connected through individual rectifiers to the grid of a triode with a relay winding in its anode circuit. This triode may include a number of relays in its anode circuit each of which operates at a different velocity. The light source may be situated in a parabolic reflector and is preferably of a colour widely different from that of daylight. A blue-violet fluorescent coating may be used and the photo-cell may be provided with an appropriate filter.
GB37454A 1953-01-13 1954-01-06 Velocity-dependent measuring and control systems Expired GB751224A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR1094623D FR1094623A (en) 1954-01-06
DEF10809A DE923274C (en) 1953-01-13 1953-01-13 Speed-dependent switching device
GB37454A GB751224A (en) 1954-01-06 1954-01-06 Velocity-dependent measuring and control systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB37454A GB751224A (en) 1954-01-06 1954-01-06 Velocity-dependent measuring and control systems

Publications (1)

Publication Number Publication Date
GB751224A true GB751224A (en) 1956-06-27

Family

ID=9703288

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37454A Expired GB751224A (en) 1953-01-13 1954-01-06 Velocity-dependent measuring and control systems

Country Status (2)

Country Link
FR (1) FR1094623A (en)
GB (1) GB751224A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2221268A1 (en) * 2009-02-20 2010-08-25 DEKRA Testing & Inspection GmbH Method and assembly for testing that a lift is functioning correctly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1194326B (en) * 1962-12-20 1965-06-03 Nabenfabrik Alfing Kessler K G Production line with electrohydraulically controlled machine tools and bridge-like structures

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2221268A1 (en) * 2009-02-20 2010-08-25 DEKRA Testing & Inspection GmbH Method and assembly for testing that a lift is functioning correctly
EP2650245A3 (en) * 2009-02-20 2014-01-15 DEKRA Industrial GmbH Method and assembly for testing that a lift is functioning correctly

Also Published As

Publication number Publication date
FR1094623A (en) 1955-05-23

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