GB285433A - Electrical device for timing the passage of moving objects past a given point - Google Patents

Electrical device for timing the passage of moving objects past a given point

Info

Publication number
GB285433A
GB285433A GB4506/28A GB450628A GB285433A GB 285433 A GB285433 A GB 285433A GB 4506/28 A GB4506/28 A GB 4506/28A GB 450628 A GB450628 A GB 450628A GB 285433 A GB285433 A GB 285433A
Authority
GB
United Kingdom
Prior art keywords
light
cell
relay
moving objects
photo
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
GB4506/28A
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.)
LOUIS CHARLES FRAGER
Original Assignee
LOUIS CHARLES FRAGER
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 LOUIS CHARLES FRAGER filed Critical LOUIS CHARLES FRAGER
Publication of GB285433A publication Critical patent/GB285433A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/10—Detecting, e.g. by using light barriers
    • G01V8/12—Detecting, e.g. by using light barriers using one transmitter and one receiver

Landscapes

  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Recording Measured Values (AREA)

Abstract

285,433. Frager, L. C. Feb. 16, 1927, [Convention date]. Void [Published under Sect. 91 of the Acts]. Races, indicating &c. apparatus for.-An apparatus for recording the times at which moving objects pass a given line comprises a photo-electric cell in an electric circuit, the current variations of which, due to the interception of a beam of light by ihe object acting on the cell, are utilized to actuate the recording device. As shown in Figs. 1 and 3, the light beam from a luminous source 1 passes through a perforated rotating wheel 2 and lenses 3, 4, to a photo-electric cell 5. The wheel 2 is for the purpose of varying the luminous intensity periodically. The cell 5 has a ring-shaped cathode 9 and a blob of metal 10 sensitive to the light radiations connected to a battery 8 through the primary 7 of a transformer, the secondary 12 of which is connected to the amplifying circuit as shown, the last valve acting as a detector and its plate circuit being connected to a relay 17. The relay 17 has two windings the second winding being connected to a potentiometer 16 so as to compensate for the steady plate current. By this means the relay comes into action only when the beam of light is intercepted by an object whereupon the contacts 22 are closed and the recording device 23 is actuated to mark a constant speed record-drum 24.
GB4506/28A 1927-02-16 1928-02-13 Electrical device for timing the passage of moving objects past a given point Expired GB285433A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR285433X 1927-02-16

Publications (1)

Publication Number Publication Date
GB285433A true GB285433A (en) 1928-06-28

Family

ID=8887206

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4506/28A Expired GB285433A (en) 1927-02-16 1928-02-13 Electrical device for timing the passage of moving objects past a given point

Country Status (1)

Country Link
GB (1) GB285433A (en)

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