US3745501A - Seating for the screw spindle and guide means for the sliding contact wire in a glass tube thermometer of round,non-circular or polygonal cross section and containing adjustable electrical contact means for temperature - Google Patents

Seating for the screw spindle and guide means for the sliding contact wire in a glass tube thermometer of round,non-circular or polygonal cross section and containing adjustable electrical contact means for temperature Download PDF

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Publication number
US3745501A
US3745501A US00213648A US3745501DA US3745501A US 3745501 A US3745501 A US 3745501A US 00213648 A US00213648 A US 00213648A US 3745501D A US3745501D A US 3745501DA US 3745501 A US3745501 A US 3745501A
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US
United States
Prior art keywords
screw spindle
seating
electrical contact
blades
extension
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
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US00213648A
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English (en)
Inventor
P Juchheim
J Koenig
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
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Publication of US3745501A publication Critical patent/US3745501A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0202—Switches
    • H05B1/0211—Switches using the expansion of an electric conductive liquid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K5/00—Measuring temperature based on the expansion or contraction of a material
    • G01K5/02—Measuring temperature based on the expansion or contraction of a material the material being a liquid
    • G01K5/16—Measuring temperature based on the expansion or contraction of a material the material being a liquid with electric contacts

Definitions

  • ABSTRACT A seating for the screw spindle and a guide means for the sliding contact wire in a glass tube thermometer of round, non-circular or polygonal cross section and containing adjustable electrical contact means for temperature control and/or limitation.
  • the seating for the screw spindle provided for setting the required temperature has a pan-shaped bottom and resilient blades forming the sides of the seating, one of the blades having an extension bent over inwards into parallelism with the pan-shaped bottom to form a lug containing a hole in which the lower end of the screw spindle is eccentrically or centrically held, whereas another of the blades is likewise extended but the extension bent over outwards into parallelism with the blade itself.
  • the bend contains an opening and the blade itself a corrugation which in cooperation with the extension and together with the hole forms a tubular guideway for the electrical contact wire.
  • the bottom bearing of the screw spindle carrying the travelling nut in mercury-in-glass thermometers that are provided with an adjustable electrical contact for temperature control and/r limitation is traditionally a ceramic or solid metal seating for the pointed end of the screw spindle.
  • the sliding contact in such an arrangement comprises a platinum coil inserted in a curved glass tube or an unsupported coiled spring contacting the contact wire at several points.
  • the present invention provides a seating for the screw spindle and a guide means for the sliding contact wire in a glass tube thermometer of round, non-circular or polygonal cross section and containing adjustable electrical contact means for temperature control and/or limitation, which comprises a panshaped bottom and resilient blades forming the sides of opening and said other blade a corrugation which in cooperation with the extension and together with the opening in said bend forms a tubular guideway for an electrical contact wire.
  • the drawing shows a screw spindle 1 for adjusting the required temperature, which is mounted inside a round section glass tube 2, its lower end being held in a spindle seating 3 as proposed by the invention, whereas its upper end works in a conventional bearing not shown in the drawing.
  • the travelling nut which is likewise not shown works on the screw spindle 1 in as eccentric a position as possible.
  • the spindle seating 3 is provided in the region of a constriction in the glass tube 2 between the upper end of the glass tube 2 and the capillary and comprises a pan-shaped bottom 4 which has an annular edge 4' from which an annulus of resilient blades 4" extend in the upward direction and resiliently bear against the inside wall of the glass tube constriction.
  • This arrangement has the advantage of allowing some tolerational variations in the dimensions of the glass tube constriction and of nevertheless providing a secure bearing for the screw spindle 1 inside the constriction and preventing the passage of dirt.
  • the lower pointed end 1' of the screw spindle 1 stands on the pan-shaped bottom 4 and is secured against lateral displacement from its eccentric position by being passed through a hole in a bearing lug 5 forming an extension of one of the blades 4" bent over at about If a non-circulanoval or polygonal glass tube is to be used, the cross section of the proposed pan-shaped screw spindle seating must be adapted thereto in shape.
  • pointed end 1 of the screw spindle 1 may also engage in a recess or in a bore in the bottom 4 of the seating 3.
  • an electrical contact wire of the blades 4" For the passage of an electrical contact wire of the blades 4" is provided with a corrugation 7 impressed into said blade in the direction towards the pointed end 1' of the screw spindle 1.
  • This blade 4" also has an extension which is bent over at and forms a strap 8.
  • An opening 9 is provided in the bend connecting the corrugation 7 and the strap 8 for the passage therethrough of the contact wire 6 which simultaneously slides through the tubular passage created between the corrugation 7 and the strap 8, so that it makes sliding contact with the spindle seating 3 at least at two points. This ensures the maintenance of satisfactory electrical contact.
  • a seating for the screw spindle and a guide means for the sliding contact wire in a glass tube thermometer of round, non-circular or polygonal cross section and containing adjustable electrical contact means for temperature control and/or limitation comprising a panshaped bottom and resilient blades forming the sides of the seating, one of said blades having an extension bent over inwards into parallelism with the pan-shape bottom to form a bearing lug containing a hole in which the lower end of a screw spindle is held, whereas another of said blades has an outwardly directed bend followed by an extension extending parallel to said other blade, said bend containing an opening and said other blade a corrugation which in cooperation with the extension and together with the opening in said bend forms a tubular guideway for an electrical contact wire.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Cookers (AREA)
  • Transmission Devices (AREA)
  • Rolling Contact Bearings (AREA)
US00213648A 1971-06-01 1971-12-29 Seating for the screw spindle and guide means for the sliding contact wire in a glass tube thermometer of round,non-circular or polygonal cross section and containing adjustable electrical contact means for temperature Expired - Lifetime US3745501A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712127039 DE2127039A1 (de) 1971-06-01 1971-06-01 Gewindespindelsitz Lagerung und Schleifkontaktdraht Fuhrung fur Glas thermometer mit rundem oder unrundem Glasrohr und mit verstellbarem elektri sehen Kontakt zur Temperaturregelung und/oder Begrenzung

Publications (1)

Publication Number Publication Date
US3745501A true US3745501A (en) 1973-07-10

Family

ID=5809452

Family Applications (1)

Application Number Title Priority Date Filing Date
US00213648A Expired - Lifetime US3745501A (en) 1971-06-01 1971-12-29 Seating for the screw spindle and guide means for the sliding contact wire in a glass tube thermometer of round,non-circular or polygonal cross section and containing adjustable electrical contact means for temperature

Country Status (7)

Country Link
US (1) US3745501A (enExample)
AT (1) AT311088B (enExample)
CH (1) CH528728A (enExample)
DE (1) DE2127039A1 (enExample)
FR (1) FR2119398A5 (enExample)
GB (1) GB1325278A (enExample)
IT (1) IT944228B (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4625408A (en) * 1978-12-27 1986-12-02 Ferranti Plc Measuring apparatus
US5488347A (en) * 1994-05-31 1996-01-30 Therm-O-Disc, Incorporated Thermostat assembly with flanged disc cup

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4625408A (en) * 1978-12-27 1986-12-02 Ferranti Plc Measuring apparatus
US5488347A (en) * 1994-05-31 1996-01-30 Therm-O-Disc, Incorporated Thermostat assembly with flanged disc cup

Also Published As

Publication number Publication date
CH528728A (de) 1972-09-30
GB1325278A (en) 1973-08-01
IT944228B (it) 1973-04-20
AT311088B (de) 1973-10-25
DE2127039A1 (de) 1972-12-14
FR2119398A5 (enExample) 1972-08-04

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