GB775522A - - Google Patents

Info

Publication number
GB775522A
GB775522A GB775522DA GB775522A GB 775522 A GB775522 A GB 775522A GB 775522D A GB775522D A GB 775522DA GB 775522 A GB775522 A GB 775522A
Authority
GB
United Kingdom
Prior art keywords
resistance
sheath
insulating material
july
rolling
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
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.)
Publication date
Publication of GB775522A publication Critical patent/GB775522A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/10—Measuring tapes
    • G01B3/1041—Measuring tapes characterised by casings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/10—Measuring tapes
    • G01B3/1041—Measuring tapes characterised by casings
    • G01B3/1046—Details of external structure thereof, e.g. shapes for ensuring firmer hold
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/10—Measuring tapes
    • G01B3/1084—Tapes combined with arrangements for functions other than measuring lengths
    • G01B3/1092—Tapes combined with arrangements for functions other than measuring lengths for performing length measurements and at least one other measurement of a different nature, e.g. bubble-type level
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C9/00—Measuring inclination, e.g. by clinometers, by levels
    • G01C9/18—Measuring inclination, e.g. by clinometers, by levels by using liquids
    • G01C9/24—Measuring inclination, e.g. by clinometers, by levels by using liquids in closed containers partially filled with liquid so as to leave a gas bubble
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/06—Switches operated by change of speed
    • H01H35/10—Centrifugal switches
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material

Abstract

775,522. Sheathed heating resistances. GENERAL ELECTRIC CO. July 7, 1955 [July 7, 1954], No. 19691/55. Class 39(3) In a resistance heater of the tubular sheathed type having a heating resistance embedded in a mass of heat conducting and electrically insulating material, e.g. magnesium oxide or aluminium oxide or alumina or magnesia cement enclosed by an outer sheath usually metallic, the heating resistance 8 has a hollow core space therein and comprises a metal tube in a straight, helical or serpentine length and with a circular, elliptical, rectangular, triangular or other annular crosssection. The core space 5 of the tubular resistance 8 is preferably filled with an insulating material, e.g. magnesium oxide, which is preferably compacted into a dense mass by rolling or swagging prior to shaping the resistance 8. Insulating material 6 is loaded in pulverulent or granular form into the metal sheath 10 to embed the resistance 8, and is densely compacted, preferably by elongating and reducing the diameter of the sheath by swaging or rolling. When the material 6 is a magnesia or alumina cement, compacting is not necessary. The sheath 10 carries a terminal at each end.
GB775522D 1954-07-07 Expired GB775522A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1126811XA 1954-07-07 1954-07-07

Publications (1)

Publication Number Publication Date
GB775522A true GB775522A (en) 1900-01-01

Family

ID=22345284

Family Applications (1)

Application Number Title Priority Date Filing Date
GB775522D Expired GB775522A (en) 1954-07-07

Country Status (5)

Country Link
BE (1) BE539613A (en)
CH (1) CH339298A (en)
DE (1) DE1053110B (en)
FR (1) FR1126811A (en)
GB (1) GB775522A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3092799A (en) * 1958-02-18 1963-06-04 Nat Res Dev Apparatus for detecting combustible gases having an electrically conductive member enveloped in a refractory material
GB2279855A (en) * 1993-07-02 1995-01-11 Zortech Int Resistance tubular heating wire

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL153755C (en) * 1966-10-20 1977-11-15 Stichting Reactor Centrum METHOD FOR MANUFACTURING AN ELECTRIC HEATING ELEMENT, AS WELL AS HEATING ELEMENT MANUFACTURED USING THIS METHOD.
DE19628471C2 (en) * 1995-07-14 2003-08-28 Eldis Ehmki & Schmid Ohg package resistance

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR476666A (en) * 1914-05-01 1915-08-24 Ateliers De Constructions Electriques Du Nord Et De Lest Electric heating element

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3092799A (en) * 1958-02-18 1963-06-04 Nat Res Dev Apparatus for detecting combustible gases having an electrically conductive member enveloped in a refractory material
GB2279855A (en) * 1993-07-02 1995-01-11 Zortech Int Resistance tubular heating wire

Also Published As

Publication number Publication date
DE1053110B (en) 1959-03-19
BE539613A (en)
CH339298A (en) 1959-06-30
FR1126811A (en) 1956-12-03

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