US2220752A - Thermostatic switch - Google Patents

Thermostatic switch Download PDF

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Publication number
US2220752A
US2220752A US177501A US17750137A US2220752A US 2220752 A US2220752 A US 2220752A US 177501 A US177501 A US 177501A US 17750137 A US17750137 A US 17750137A US 2220752 A US2220752 A US 2220752A
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US
United States
Prior art keywords
spiral
frame
secured
thermostatic switch
contact
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
US177501A
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English (en)
Inventor
Blanc Aime
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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 US2220752A publication Critical patent/US2220752A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/64—Contacts
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/04—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors
    • C23G1/06—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors
    • C23G1/061—Cleaning or pickling metallic material with solutions or molten salts with acid solutions using inhibitors organic inhibitors nitrogen-containing compounds

Definitions

  • the present invention relates to improvements in fire detectors, in their signal relays, and in the combinations of circuits. These improvements aflord in all casesa most reliable operation,
  • Fig. 1 is a front view, with the protecting cover removed, of the fire detector embodying the said improvements.
  • FIG. 2 is a section on the line a-b of Fig. 1, projected on the left hand side and provided with the protecting cover.
  • the detector consists [of a bimetal spiral I theo inner end of which is secured to a central pin 2 which is insulated from the frame 3 and is adjustable by a nut 4 (Fig. 2). This adjustment may be effected in order to give the proper tension to the spiral according to the height of the 35 predetermined temperature at which it is desired to obtain the operation of the relays.
  • the outer end of the spiral carries a sector 5 consisting of insulating material, which is provided at each end with twoplates 6 which form 40 contact-pieces and are connected together by a wire 6'.
  • the set of plates 6 is comprised in a good conducting circuit with spiral I, pin 2 and the terminal I which is placed beyond the said pin and may for instance be connected to the 45- relay by an insulated conductor.
  • the second terminal 8 which in this case is connected to the source of current, is mounted on a pin S'which is insulated from frame 3 by means of member 9*.
  • the said pin 9 carries at 50 its end a small support It to which is secured a double fork-shaped friction device I I whose two very flexible. contact parts are slidable on the respective sides of sector 5.
  • the device comprises, between terminals 1 and 8, a resistance or a condenser I3, whatever be the arrangement employed.
  • Stops such as l l (Fig. 1) and [5 (Fig. 2) serve 20 to determine the limiting positions of spiral l.
  • a perforated cover 3' (Fig.2) which can be readily removed for the inspection of the interior. 25
  • the contacts for the latter are constructed in accordance with the same principle.
  • a device for detecting fire and the like comprising a frame, at least one bimetallic stripnhaving the form of a spiral, the inner end of which is secured in a preferably adjustable manner to said frame, a contact surface on the second free end of the spiral, comprising alternately disposed conducting and insulating regions, and electric contactssecured to said frame and cooperating with said alternative regions, said contacts being flexible and having the shape of a forked member bearing on both sides against said contact surface, said inner end of said spiral and said contacts secured to the frame being adapted to be inserted in an electric circuit.
  • a device for detecting fire and the like, chiefly adapted v for use on movable apparatus and members comprising a frame, at least one bimetallic strip having theform of a spiral, the inner end of which is secured in a preferably adjustable manner to said frame, a contact surface on the second free end of the spiral, consisting of a sector shaped element of insulating material having metallic plates secured on its both sides and at least on one of its ends, and comprising a central region of insulating material, these plates forming alternative regions of conducting and insulating material, and electric contacts secured to said frame and cooperating with said contact surface, said contacts being flexible and having the. shape of a forked member bearing on both 5.
  • Device according to claim l further comprising stops for limiting the movement of said contact surface.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Thermally Actuated Switches (AREA)
  • Fire Alarms (AREA)
  • Fuses (AREA)
US177501A 1936-12-08 1937-12-01 Thermostatic switch Expired - Lifetime US2220752A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR493244X 1936-12-08

Publications (1)

Publication Number Publication Date
US2220752A true US2220752A (en) 1940-11-05

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ID=8904618

Family Applications (1)

Application Number Title Priority Date Filing Date
US177501A Expired - Lifetime US2220752A (en) 1936-12-08 1937-12-01 Thermostatic switch

Country Status (3)

Country Link
US (1) US2220752A (en))
GB (1) GB493244A (en))
NL (2) NL85370B (en))

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2762887A (en) * 1951-09-08 1956-09-11 Champion Safe Top Co Thermal responsive device
US20050275501A1 (en) * 2003-11-14 2005-12-15 Honywell International, Inc. Negative rate switch methods and systems for resilient actuating device
ITMI20120075A1 (it) * 2012-01-24 2013-07-25 Luigi Pietro Roveda Dispositivo di segnalamento di pericolo ghiaccio

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2762887A (en) * 1951-09-08 1956-09-11 Champion Safe Top Co Thermal responsive device
US20050275501A1 (en) * 2003-11-14 2005-12-15 Honywell International, Inc. Negative rate switch methods and systems for resilient actuating device
US7378934B2 (en) * 2003-11-14 2008-05-27 Honeywell International Inc. Negative rate switch methods and systems for resilient actuating device
ITMI20120075A1 (it) * 2012-01-24 2013-07-25 Luigi Pietro Roveda Dispositivo di segnalamento di pericolo ghiaccio

Also Published As

Publication number Publication date
NL182326B (nl)
NL85370B (en))
GB493244A (en) 1938-10-05

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