US1935710A - Mercury switch - Google Patents

Mercury switch Download PDF

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Publication number
US1935710A
US1935710A US481049A US48104930A US1935710A US 1935710 A US1935710 A US 1935710A US 481049 A US481049 A US 481049A US 48104930 A US48104930 A US 48104930A US 1935710 A US1935710 A US 1935710A
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US
United States
Prior art keywords
mercury
plunger
electrodes
float
core
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
US481049A
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English (en)
Inventor
Hatay Charles
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
Application granted granted Critical
Publication of US1935710A publication Critical patent/US1935710A/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
    • H01H29/00—Switches having at least one liquid contact
    • H01H29/18—Switches having at least one liquid contact with level of surface of contact liquid displaced by non-electrical contact-making plunger

Definitions

  • the core element of the electromagnet is situated in the mercury.
  • the object of this invention is to entirely avoid this dimculty.
  • the invention attains its object by 26 arranging the core of the electromagnet out of the mercury in the envelope of said device.
  • the envelope of the device is elongated to accommodate a plunger.
  • Said plunger comprises a float member and a core oi. an electromagnet.
  • Said float contains a body of mercury and is a chamber or cup made of an insulation material having suflicient buoyancy when immersed in mercury to support the core element of the magnet.
  • Said core element 30 is mounted on and above said float chamber at all operating positions. The core element and the float chamber are guided in the envelope by one of the electrodes of the device.
  • FIG. 1 is a sectional elevational view of one embodiment of the invention and Fig. 2 is a sectional elevational view of an alternative embodiment of the invention.
  • the invention comprises 50 an elongated envelope 1 having therein a mercury pool 9.
  • the new and novel switch of the present invention operates in the following manner.
  • electrodes 2 and 3 are electrically disconnected as herein- 79 before described.
  • coil 7 of the electromagnet 6, 'l is energized core 6 is attracted downward to the mid-point of said coil 7, guided thereto by electrode 2, forcing float 5 downward to displace the mercury in pool 9 so that the mercury pools 9 and 16 flow together through holes 8 to establish an electrical connection between electrodes 2 and 3 and current then flows through the switch.
  • coil '7 is short-circuited float 5 forces the plunger 5; 6 up, guided by electrode 80 2, to restore said plunger 5, 6 to its at rest position, in which position the connection between electrodes 2 and 3 is broken to interrupt the fiow of current through the switch.
  • the switch shown in Fig. 2 is in all respects 35 similar to that shown in Fig. 1 with the exception that in this case the buoyancy o! float 5 is insufllcient to support core 6 so that the two mercury pools 9 and 10 join through holes 8 when plunger 5, 6 is in its at rest position in which position electrodes 2 and 3 are electrically connected and current flows through the switch.
  • coil '7 is energized core 6 and therewith plunger 5, 6 is lifted up, guided by electrode 2, and the mercury in pool 9 is lowered until holes 8 are above the level of mercury pool 9 in which position off plunger 5, 6 themercury pools 9 and 10 are physically separated to break the electrical connection between electrodes 2, 3 interrupting the current flowing through the device.
  • coil '7 is short-circuited plunger 5, 6 falls back to its at rest position restoring the electrical connection between electrodes 2, 3 as hereinbefore described.
  • electrode lead 2 used to guide the vertical movements of the plunger 5, 6 may be a thickened strongrod instead of a wire as shown,
  • float may be partly of metal and partly or I insulation material as desired, provided that part of float 5 dividing mercury pools 9 and 10 below the holes 8 is of insulation material.
  • a mercury switch comprising a container, electrodes sealed therein, a body of mercury therein, a plunger in said container, said plunger having a core out of said mercury at all operating positions of said plunger and adapted on successive movements thereof to make and break the electrical connection between said electrodes.
  • a mercury switch comprising a container
  • said plunger comprising a float and a core, said float supporting said core out of said mercury at alloperating positions of said plunger, said plunger being adapted on successive movements thereof to make and break the electrical connection between said electrodes.
  • a mercury switch comprising a container, electrodes sealed therein, a body of mercury therein, a plunger in said container, said plunger comprising a cup and a core, said core being out of said mercury in said container and above said cup at all operating positions of said plunger, said plunger being adapted on each successive movement thereofto break and make the electrical connectionbetween said electrodes.
  • A; mercury switch comprising a container, electrodes sealed therein, a body of mercury therein, a plunger in said container and above said cup at all operating positions of said plunger, one of said electrodes being adapted to guide said plunger at all operating positions of said plunger, said plunger being adapted on successive movements thereof to make and break the electrical connection between said electrodes.
  • a mercury switch comprising a container, electrodes sealed therein, a body of mercury therein, a plunger in said container, said plunger having a core out of said mercury at all operating positions oi said plunger, one of said electrodes being adapted to guide the vertical move-, ments of said plunger, said plunger being adapted on successive movements thereof to make and break the electrical connection between said 100 electrodes.

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  • Electromagnets (AREA)
US481049A 1929-09-18 1930-09-10 Mercury switch Expired - Lifetime US1935710A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1935710X 1929-09-18

Publications (1)

Publication Number Publication Date
US1935710A true US1935710A (en) 1933-11-21

Family

ID=7750204

Family Applications (1)

Application Number Title Priority Date Filing Date
US481049A Expired - Lifetime US1935710A (en) 1929-09-18 1930-09-10 Mercury switch

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US (1) US1935710A (es)
NL (1) NL31515C (es)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3289126A (en) * 1963-01-10 1966-11-29 Fifth Dimension Inc Mercury switch employing magnetizable fluid
US4642593A (en) * 1984-04-17 1987-02-10 Elenbaas George H Impulse mercury relay with magnetic interlock switch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3289126A (en) * 1963-01-10 1966-11-29 Fifth Dimension Inc Mercury switch employing magnetizable fluid
US4642593A (en) * 1984-04-17 1987-02-10 Elenbaas George H Impulse mercury relay with magnetic interlock switch

Also Published As

Publication number Publication date
NL31515C (es)

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