US1970407A - Pyrometer lamp - Google Patents

Pyrometer lamp Download PDF

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Publication number
US1970407A
US1970407A US499743A US49974330A US1970407A US 1970407 A US1970407 A US 1970407A US 499743 A US499743 A US 499743A US 49974330 A US49974330 A US 49974330A US 1970407 A US1970407 A US 1970407A
Authority
US
United States
Prior art keywords
filament
bulb
lamp
pyrometer
line
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 - Lifetime
Application number
US499743A
Other languages
English (en)
Inventor
Estell M Watson
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority to US499743A priority Critical patent/US1970407A/en
Priority to FR718558D priority patent/FR718558A/fr
Application granted granted Critical
Publication of US1970407A publication Critical patent/US1970407A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/52—Radiation pyrometry, e.g. infrared or optical thermometry using comparison with reference sources, e.g. disappearing-filament pyrometer
    • G01J5/53—Reference sources, e.g. standard lamps; Black bodies

Definitions

  • My invention relates to so-called pyrometer lamps which areelectric lamps calibrated so that the brightness of the light source, ordinarily a glowing filament, is an indication of temperature and the brightness of a glowing object may be compared therewith to measure the temperature of the latter.
  • I provide in combination with the light source, specifically the filament of such a lamp, a marker disposed adjacent to or substantially in the same plane as the filament and preferably in line with that portion of the filament which it is desired particularly to observe. Ordinarily this would be the central portion of the filament inasmuch as this is less subject to cooling by the lead wires and is therefore of greatest brightness.
  • An eyelet is the preferred marker although other forms may be used.
  • the object is to cause the observer to focus his eyes on the filament, and the background which is the glowing object, the temperature of which is to be measured, is out of focus and an average brightness is observed and compared with that of the filament. In the absence of the marker, the observer might well focus on the object rather than the filament.
  • the single figure of the drawing is a perspective view of the pyrometer lamp of my invention of which a portion of the glass bulb has been broken away to show the interior.
  • the lamp shown therein comprises the bulb 10 which is coated except for the circular areas 11 and 12 by an opaque material, the stem 13, the eyelet 14 preferably of metal such as nickel, and the relatively short filament 15.
  • the material covering the bulb was applied by dipping said bulb into a material such as Goodrich acid seal rubber paint #1011, and then removingthe paint from areas 11 and-12 after the. paint has been allowed to harden. The location of these cleared areas should be such that a line passing through their centers is perpendicular to the plane of the filament and passes through the center thereof.
  • the filament 15 is preferably of carbon and is connected by Joints of suitable paste to the leading-in wires 16 and 17 which are connected to the shell 18 and the contact plate 19 respectively of the base.
  • Theeyelet 14 is so located with reference to the filament that the operator who sights through one cleared area and out the other to match the brightness of the filament to the What I claim as new and desire to secure by Letters Patent of the United States is:
  • a pyrometer lamp comprising a bulb opaque except for small clear areas on opposite sides so of said bulb, a filament in said bulb extending across ,a line connecting said clear areas and a marker adjacent said filament and also in said.
  • a pyrometer lamp the combination of a bulb having defined thereon an optical line of vision through said bulb, a filament in said bulb extending across said line and a separate marker 7 located substantially in the same plane as said filament and also in said line.
  • a pyrometer lamp the combination of a bulb having defined thereon an optical line of vision through said bulb, a filament in said bulb extending across said line and a separate marker consisting of a small eyelet mounted adjacent said filament and also in said line.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
US499743A 1930-12-03 1930-12-03 Pyrometer lamp Expired - Lifetime US1970407A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US499743A US1970407A (en) 1930-12-03 1930-12-03 Pyrometer lamp
FR718558D FR718558A (fr) 1930-12-03 1931-06-12 Lampe pyrométrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US499743A US1970407A (en) 1930-12-03 1930-12-03 Pyrometer lamp

Publications (1)

Publication Number Publication Date
US1970407A true US1970407A (en) 1934-08-14

Family

ID=23986510

Family Applications (1)

Application Number Title Priority Date Filing Date
US499743A Expired - Lifetime US1970407A (en) 1930-12-03 1930-12-03 Pyrometer lamp

Country Status (2)

Country Link
US (1) US1970407A (fr)
FR (1) FR718558A (fr)

Also Published As

Publication number Publication date
FR718558A (fr) 1932-01-26

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