US2101093A - Barrier for mercury switches - Google Patents

Barrier for mercury switches Download PDF

Info

Publication number
US2101093A
US2101093A US47801A US4780135A US2101093A US 2101093 A US2101093 A US 2101093A US 47801 A US47801 A US 47801A US 4780135 A US4780135 A US 4780135A US 2101093 A US2101093 A US 2101093A
Authority
US
United States
Prior art keywords
aperture
barrier
mercury
switch
button
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
US47801A
Inventor
John H Payne
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
Priority to DEA76417D priority Critical patent/DE664792C/en
Priority to US47299A priority patent/US2101115A/en
Application filed by General Electric Co filed Critical General Electric Co
Priority to US47801A priority patent/US2101093A/en
Priority to US49928A priority patent/US2073529A/en
Priority to US49930A priority patent/US2142152A/en
Priority to US49929A priority patent/US2142151A/en
Priority to US49927A priority patent/US2142153A/en
Priority to US49943A priority patent/US2047931A/en
Priority to US49931A priority patent/US2155244A/en
Priority to US63527A priority patent/US2153000A/en
Priority to US70063A priority patent/US2142154A/en
Priority to DEA80870D priority patent/DE674913C/en
Priority to DEA80869D priority patent/DE670428C/en
Priority to FR830093D priority patent/FR830093A/en
Priority to GB29459/36A priority patent/GB471087A/en
Priority to GB29773/36A priority patent/GB462527A/en
Priority to GB31312/36A priority patent/GB467068A/en
Priority to GB31314/36A priority patent/GB466258A/en
Priority to GB31313/36A priority patent/GB466257A/en
Priority to DEA81982D priority patent/DE682879C/en
Application granted granted Critical
Publication of US2101093A publication Critical patent/US2101093A/en
Priority to US185175A priority patent/US2142156A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B25/00—Rims built-up of several main parts ; Locking means for the rim parts
    • B60B25/04—Rims with dismountable flange rings, seat rings, or lock rings
    • B60B25/08—Continuous flange rings; Arrangement of recesses enabling the flange rings to be slipped over the rim body
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/64—Encased switches adapted for ganged operation when assembled in a line with identical switches, e.g. stacked switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H29/00—Switches having at least one liquid contact
    • H01H29/20—Switches having at least one liquid contact operated by tilting contact-liquid container
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H29/00—Switches having at least one liquid contact
    • H01H29/20—Switches having at least one liquid contact operated by tilting contact-liquid container
    • H01H29/24—Switches having at least one liquid contact operated by tilting contact-liquid container wherein contact is made and broken between liquid and liquid
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/47—Molded joint
    • Y10T403/477—Fusion bond, e.g., weld, etc.

Definitions

  • lvly invention relates to an improved construction for electrical switches of the type in which the electrical continuity of a liquid contact medium is interrupted by the interposition of a mechanical barrier.
  • I employ in connection with the interrupting barrier'complementary liquid displacement means calculated to offset the effect of the barrier in increasing or decreasing the level of the contacting medium as the extent of immersion of the barrier increases or decreases.
  • Fig. 1 is a sectionallzed view of a liquid contact switch of the type with which my invention is particularly concerned and a supporting housing for the same;
  • Fig. 2 is a side view of the same taken in a plane 90 displaced from that of Fig. l
  • FIG. 3 is a sectionalized view of a switch button embodying the improved construction of my invention
  • Figs. 4. and 5 are additional views in section of the button shown in Fig. 3, and
  • Figs. 6 to 9 are illustrations of alternative modiflcations of which my invention is capable.
  • a switch button comprising a pair of dished metallic receptacles or cups l and 2 which when placed in opposed relationship as shown form an enclosing chamber for a quantity of a conducting fluid such as mercury.
  • the dished receptacles i and 2 are spaced and hermetically sealed together by a circular fillet of thermoplastic insulating material 3, such as glass fusion-welded or otherwise secured in vacuum-tight relation with the adjacent peripheries of the receptacle members.
  • a refractory insulating barrier 4 of magnesia, alumina, or similar arc-resisting material forming a diaphragm or partition extending centrally across the switchbody.
  • a body of mercury, or other suitable liquid contacting medium 5' of such depth as to be capable of flowing through a circular aperture 6 formed in the barrier 4, when the switch-button is in the position shown.
  • the switch button as a whole is frictionally supported as in a' ball and socket joint by conducting metallic abutments 'l and 8 whose projecting faces fit into corresponding depressions in the switch walls.
  • the abutment .members themselves are securely mounted on the support ing walls of a housing 9 which is composed of suitable insulating material, for example a phenolic condensation product.
  • a housing 9 which is composed of suitable insulating material, for example a phenolic condensation product.
  • Fig. 2 shows a side elevation of the switch button with its interior exposed by the removal of the cup member.
  • the position of the aperture B'shown in solid outline represents the approximate degree of immersion required to insure a contacting relationship between the mercury bodies on each side of the barrier 4. It has been observed that with a smaller portion of the aperture below the mercury surface, the surface tension of the mercury tends to prevent it from flowing freely through the aperture.
  • Figs; 3, 4, and 5 I have illustrated a switchbutton, constructed in accordance with the principles of my invention, which overcomes the objectionable efiects described above.
  • the parts corresponding to those described in connection with Figs. 1 and 2 are similarly nummetrically with respect to the aperture 6, but
  • the depressed channels l8 and IQ of which the former is shown most clearly in Fig. 4, while intended chiefly as an aid in aligning the switchbutton parts, also serve to augment the corrective effect of the main recesses l2 and l3.
  • the si nificance of the arrangement just described will be most readily appreciated from an inspection of Fig.
  • I provide positive liquid displacement means arranged adjacent the aperture 8 and adapted to be immersed simultaneously therewith. As illustrated, these take the form of protuberances .l5 and I6 projecting inwardly from the walls of the dished receptacles l and 2 and in alignment with the aperture 8. If .the displacement of the projecting portions is comparable to the volume of the aperture itself, the level disturbing effect produced by raising the aperture above the mercury surface will be substantially offset by the simultaneous and converse effect of the projections l5 and I5. As before the completeness of the compensation will depend upon the relative volumes of the displacing parts.
  • Figs. 8 and 9 illustrate a further modification of my invention in which a single recess I1 is placed on one side of the barrier 4.
  • Fig. 9 represents the switch-button as being rotated from the position shown in Fig. 8 and comprises a section taken on the line oi! centers of the aperture 8 and the recess 11.
  • the angular displacement between the recess and the aperture is made substantially less than In rotating the switch-button counter-clockwise to the oil-position, the progressive immersion of the recess I1 prevents any rise in the mercury level.- Furthermore, the fact that the chambers on opposite sides of the barrier 4 are in physical communication through the aperture t assures an equalizing flow of mercury toward the recessed side while the aperture is being moved in an upward direction. 1
  • a contact-governing barrier having an aperture therein adapted to be successively immersed in and withdrawn from said medium by rotation of said switch, said barrier being provided with a depression extending only partially therethrough and positioned to be immersed in said medium as said aperture is withdrawn therefrom.
  • an insulatingbarrier dividing said vessel into a plurality of electrically separate compartments and being provided with an aperture therein, a quantity of mercury in said vessel adapted to establishan electrical circuit between said compartments through said aperture, said barrier being also provided with a depression extending partially therethrough, which depression is of such size and so positioned as substantially to reduce variations in mercury level caused by changes in the degree 01 immersion of said aperture.
  • a liquid contactin medium a contact-governing barrier having an aperture therein adapted to be immersed in said, medium by rotation of said switch, said barrier having a depression extending partially therethrough, which depression is of a size comparable to that of said aperture and is approximately diametricallydisplaced with respect to said aperture.
  • a circuitinterrupting barrier comprising an insulating septum having an aperture therethrough and depressio'ns in the surfaces thereof angularly displaced irom said aperture, said depressions being of a size comparable to that of said aperture and extending only partially through said septum.
  • An electrical switch comprising a pair of juxtaposed shallow dished metal members forming an enclosure, 9. quantity of mercury within said enclosure, an insulating barrier interposed between said dished members and dividing said enclosure into a pair of electrically separate mercury storage spaces of small volume in comparison with their depth, said barrier being provided with an aperture adapted to be immersed in said aperture.

Description

Dec. 7, 1937. J. H, PAYNE BARRIER FOR MERCURY SWI TCHES Filed Nov. 1, 1935 e n y i m mpn w eHY v A mm Wm Z/ BARRIER FOR. MERCURY SWITCHES John H. Payne, Ballston Spa,'N. Y., assignor to General Electric Company, a corporation of New Yorlr Application November 1,
5 Claims. '(Cl. 200-152) lvly invention relates to an improved construction for electrical switches of the type in which the electrical continuity of a liquid contact medium is interrupted by the interposition of a mechanical barrier.
It is an object of my present invention to provide a switch of the above class in which the physical motion required to accomplish a positive switching operation is reduced to a minimum. To this end I employ in connection with the interrupting barrier'complementary liquid displacement means calculated to offset the effect of the barrier in increasing or decreasing the level of the contacting medium as the extent of immersion of the barrier increases or decreases.
The novel features which I believe to be characteristic of my invention are set forth with particularity in the appended claims. My invention, itself, however, will best be understood by reference to the following specification taken in connectlon with the accompanying drawing, in which Fig. 1 is a sectionallzed view of a liquid contact switch of the type with which my invention is particularly concerned and a supporting housing for the same; Fig. 2 is a side view of the same taken in a plane 90 displaced from that of Fig. l
and having the housing and one side of the switch removed; Fig. 3 is a sectionalized view of a switch button embodying the improved construction of my invention; Figs. 4. and 5 are additional views in section of the button shown in Fig. 3, and
Figs. 6 to 9 are illustrations of alternative modiflcations of which my invention is capable.
The nature of the problem with which my invention deals may be most readily appreciated by reference to Figs. 1 and 2. Referring particularly to Fig. 1, I have illustrated a switch button comprising a pair of dished metallic receptacles or cups l and 2 which when placed in opposed relationship as shown form an enclosing chamber for a quantity of a conducting fluid such as mercury. The dished receptacles i and 2 are spaced and hermetically sealed together by a circular fillet of thermoplastic insulating material 3, such as glass fusion-welded or otherwise secured in vacuum-tight relation with the adjacent peripheries of the receptacle members.
In order to divide the switch enclosure into separate symmetrically positioned chambers, there is provided a refractory insulating barrier 4 of magnesia, alumina, or similar arc-resisting material forming a diaphragm or partition extending centrally across the switchbody. With the assembly so far described the metallic receptacles i and 2 are adapted to be maintained in 1935, Serial lN'o. 47,801
electrically non-conducting relation. However, in order to permit current to flow between them,
there is additionally provided in the switch enclosure a body of mercury, or other suitable liquid contacting medium 5', ofsuch depth as to be capable of flowing through a circular aperture 6 formed in the barrier 4, when the switch-button is in the position shown.
The switch button as a whole is frictionally supported as in a' ball and socket joint by conducting metallic abutments 'l and 8 whose projecting faces fit into corresponding depressions in the switch walls. The abutment .members themselves are securely mounted on the support ing walls of a housing 9 which is composed of suitable insulating material, for example a phenolic condensation product. For varying the angular position of the switch-button, and, consequently the position of the aperture 6 with reference to the surface of the mercury pool 5,. I provide an insulating handle Ill which may be. affixed to an external surface of the switch by suitably clamping the same thereto.
The mode of operation of a switch of the type described will be apparent upon an inspection of Fig. 2, which shows a side elevation of the switch button with its interior exposed by the removal of the cup member. In this figure the position of the aperture B'shown in solid outline represents the approximate degree of immersion required to insure a contacting relationship between the mercury bodies on each side of the barrier 4. It has been observed that with a smaller portion of the aperture below the mercury surface, the surface tension of the mercury tends to prevent it from flowing freely through the aperture.
It is obvious that a counter-clockwise motion of the switch handle It] will be effective to raise the lower edge of the aperture 6 above the level of the mercury 5, thus causing the solid portions of the barrier to interrupt the electrical continuity thereof. It should be noted, however, that the angular rotation of the handle which is required to accomplish this result is considerably increased by the fact that a decrease in the extent of immersion of the aperture it raises the actual elevation of the mercury surface. This is due to the fact that agreater proportion of the solid barrier 4 is immersed in the mercury than was previously the case, thus correspondingly increasing the displacement of the same. For this reason the aperture 6 will not completely clear the mercury surface until it reaches the position indicated in dotted outline as Ed, corresponding to the position of the switch handle noted as Illa. At this time the level of the liquid contact material will have been raised by increased displacement due to movement of the solid barrier to the position designated as 51:.
While this effect is present to a certain extent in all liquid contact devices of the general type under consideration its importance is greatly magnified in a switch structure of small dimensions such as that which I have described above.
- In such a structure the fact that the total volume of thefluid medium is relatively smallwith reference to the volume of the barrier aperture tends toexaggerate the magnitude of the mercury level variations. It will be readily understood that this result. is particularly objectionable.
This result is particularly objectionable in applications where the switch-button is desired to be moved with a minimum of energy, as by the delicate mechanism used in control operations.
It will be clear in this connection that the change in mercury level described above actually represents the expenditure of enough energy to lift the volume of mercury comprised between the surface levels 5 and 5a.
In Figs; 3, 4, and 5, I have illustrated a switchbutton, constructed in accordance with the principles of my invention, which overcomes the objectionable efiects described above. In this figure the parts corresponding to those described in connection with Figs. 1 and 2 are similarly nummetrically with respect to the aperture 6, but
may assume any angular position such that their immersion in theliquid contacting medium increases as the aperture is withdrawn therefrom. Furthermore, while the depressions are exemplified as being of circular outline, it will be understood that other shapes may be used without departing from the scope of my invention. The depressed channels l8 and IQ, of which the former is shown most clearly in Fig. 4, while intended chiefly as an aid in aligning the switchbutton parts, also serve to augment the corrective effect of the main recesses l2 and l3. The si nificance of the arrangement just described will be most readily appreciated from an inspection of Fig. 5, which illustrates the manner in which the increased displacement of mercury occasioned by raising the aperture 6 above the mercury surface is compensated by a correspondingly in creased immersion of the depressions l2 and I3. It will be apparent that by a suitable choice of dimensions-any increase in the mercury level may be wholly or partially offset by '9. correspond ing decrease caused by the recessed areas. A condition of zero level variation will be attained when the aggregate volume of the depressions l2 and i3 is about the same as that of the aperture 6, and when the rate of decrease of immersion of the former equals the rate oiincrease of the latter. When this last-described condition is fulfilled rotation of the switch-button may be accomplished with the expenditure of no energy beyond that required to overcome the frictional resistance and the surface tension of the mercury. Furthermore, the angular distance through which the switch is required to be rotated to open or.
flcation instead of providing recessed areas angularly positioned from the aperture 6 and operating to decrease the immersed volume of the barrier I3, I provide positive liquid displacement means arranged adjacent the aperture 8 and adapted to be immersed simultaneously therewith. As illustrated, these take the form of protuberances .l5 and I6 projecting inwardly from the walls of the dished receptacles l and 2 and in alignment with the aperture 8. If .the displacement of the projecting portions is comparable to the volume of the aperture itself, the level disturbing effect produced by raising the aperture above the mercury surface will be substantially offset by the simultaneous and converse effect of the projections l5 and I5. As before the completeness of the compensation will depend upon the relative volumes of the displacing parts.
It will be understood that the external depression 20 appearing in Fig. '7 is provided solely as an aid in aligning the switch parts and does not afiect the operation oi'the mercury displacing elements. 4
Figs. 8 and 9 illustrate a further modification of my invention in which a single recess I1 is placed on one side of the barrier 4. For the sake of clarity Fig. 9 represents the switch-button as being rotated from the position shown in Fig. 8 and comprises a section taken on the line oi! centers of the aperture 8 and the recess 11. It will be noted that in order to-permit the use of a smaller quantity of mercury the angular displacement between the recess and the aperture is made substantially less than In rotating the switch-button counter-clockwise to the oil-position, the progressive immersion of the recess I1 prevents any rise in the mercury level.- Furthermore, the fact that the chambers on opposite sides of the barrier 4 are in physical communication through the aperture t assures an equalizing flow of mercury toward the recessed side while the aperture is being moved in an upward direction. 1
While I have shown a particular embodiment of my invention, it will of course be understood What I claim as new and desire to secure by Letters Patent of the United States, is:
1. In an electrical switch containing a liquid contacting medium, a contact-governing barrier having an aperture therein adapted to be successively immersed in and withdrawn from said medium by rotation of said switch, said barrier being provided with a depression extending only partially therethrough and positioned to be immersed in said medium as said aperture is withdrawn therefrom.
2. In an electrical switch, an enclosing vessel.
an insulatingbarrier dividing said vessel into a plurality of electrically separate compartments and being provided with an aperture therein, a quantity of mercury in said vessel adapted to establishan electrical circuit between said compartments through said aperture, said barrier being also provided with a depression extending partially therethrough, which depression is of such size and so positioned as substantially to reduce variations in mercury level caused by changes in the degree 01 immersion of said aperture.
3. In an electrical switch, a liquid contactin medium, a contact-governing barrier having an aperture therein adapted to be immersed in said, medium by rotation of said switch, said barrier having a depression extending partially therethrough, which depression is of a size comparable to that of said aperture and is approximately diametricallydisplaced with respect to said aperture.
4. For use in a liquid contact switch a circuitinterrupting barrier comprising an insulating septum having an aperture therethrough and depressio'ns in the surfaces thereof angularly displaced irom said aperture, said depressions being of a size comparable to that of said aperture and extending only partially through said septum.
5. An electrical switch comprising a pair of juxtaposed shallow dished metal members forming an enclosure, 9. quantity of mercury within said enclosure, an insulating barrier interposed between said dished members and dividing said enclosure into a pair of electrically separate mercury storage spaces of small volume in comparison with their depth, said barrier being provided with an aperture adapted to be immersed in said aperture.
JOHN H. PAYNE,
US47801A 1935-10-29 1935-11-01 Barrier for mercury switches Expired - Lifetime US2101093A (en)

Priority Applications (21)

Application Number Priority Date Filing Date Title
DEA76417D DE664792C (en) 1935-10-29 1935-07-05 Liquid switch capsule
US47299A US2101115A (en) 1935-10-29 1935-10-29 Electric switch of the fluid flow type
US47801A US2101093A (en) 1935-10-29 1935-11-01 Barrier for mercury switches
US49928A US2073529A (en) 1935-10-29 1935-11-15 Electric switch
US49930A US2142152A (en) 1935-10-29 1935-11-15 Electric switch
US49929A US2142151A (en) 1935-10-29 1935-11-15 Electric switch
US49927A US2142153A (en) 1935-10-29 1935-11-15 Electric switch
US49943A US2047931A (en) 1935-10-29 1935-11-15 Electric switch
US49931A US2155244A (en) 1935-10-29 1935-11-15 Electric switch
US63527A US2153000A (en) 1935-10-29 1936-02-12 Ceramic body
US70063A US2142154A (en) 1935-10-29 1936-03-21 Electric switch
DEA80870D DE674913C (en) 1935-10-29 1936-10-27 Fluid switch capsule, which consists of two metal shells that serve as electrodes and are separated from one another by an insulating partition
DEA80869D DE670428C (en) 1935-10-29 1936-10-27 Liquid switch capsule
FR830093D FR830093A (en) 1935-10-29 1936-10-28 Improvements to mercury switches
GB29459/36A GB471087A (en) 1935-10-29 1936-10-29 Improvements in and relating to fluid flow electric switches
GB29773/36A GB462527A (en) 1935-10-29 1936-11-02 Improvements in and relating to mercury and like conducting liquid switches
GB31312/36A GB467068A (en) 1935-10-29 1936-11-16 Improvements in and relating to mercury and like conducting-liquid electric switches
GB31314/36A GB466258A (en) 1935-10-29 1936-11-16 Improvements in and relating to mercury and like conducting-liquid electric switches
GB31313/36A GB466257A (en) 1935-10-29 1936-11-16 Improvements in and relating to mercury and like conducting-liquid electric switches
DEA81982D DE682879C (en) 1935-10-29 1937-02-13 Ceramic partition for a liquid switch capsule
US185175A US2142156A (en) 1935-10-29 1938-01-15 Electric switch

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
US47299A US2101115A (en) 1935-10-29 1935-10-29 Electric switch of the fluid flow type
US47801A US2101093A (en) 1935-10-29 1935-11-01 Barrier for mercury switches
US49927A US2142153A (en) 1935-10-29 1935-11-15 Electric switch
US49943A US2047931A (en) 1935-10-29 1935-11-15 Electric switch
US49931A US2155244A (en) 1935-10-29 1935-11-15 Electric switch
US49930A US2142152A (en) 1935-10-29 1935-11-15 Electric switch
US49929A US2142151A (en) 1935-10-29 1935-11-15 Electric switch
US49928A US2073529A (en) 1935-10-29 1935-11-15 Electric switch
US63527A US2153000A (en) 1935-10-29 1936-02-12 Ceramic body
US70063A US2142154A (en) 1935-10-29 1936-03-21 Electric switch

Publications (1)

Publication Number Publication Date
US2101093A true US2101093A (en) 1937-12-07

Family

ID=41402567

Family Applications (11)

Application Number Title Priority Date Filing Date
US47299A Expired - Lifetime US2101115A (en) 1935-10-29 1935-10-29 Electric switch of the fluid flow type
US47801A Expired - Lifetime US2101093A (en) 1935-10-29 1935-11-01 Barrier for mercury switches
US49929A Expired - Lifetime US2142151A (en) 1935-10-29 1935-11-15 Electric switch
US49943A Expired - Lifetime US2047931A (en) 1935-10-29 1935-11-15 Electric switch
US49931A Expired - Lifetime US2155244A (en) 1935-10-29 1935-11-15 Electric switch
US49927A Expired - Lifetime US2142153A (en) 1935-10-29 1935-11-15 Electric switch
US49928A Expired - Lifetime US2073529A (en) 1935-10-29 1935-11-15 Electric switch
US49930A Expired - Lifetime US2142152A (en) 1935-10-29 1935-11-15 Electric switch
US63527A Expired - Lifetime US2153000A (en) 1935-10-29 1936-02-12 Ceramic body
US70063A Expired - Lifetime US2142154A (en) 1935-10-29 1936-03-21 Electric switch
US185175A Expired - Lifetime US2142156A (en) 1935-10-29 1938-01-15 Electric switch

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US47299A Expired - Lifetime US2101115A (en) 1935-10-29 1935-10-29 Electric switch of the fluid flow type

Family Applications After (9)

Application Number Title Priority Date Filing Date
US49929A Expired - Lifetime US2142151A (en) 1935-10-29 1935-11-15 Electric switch
US49943A Expired - Lifetime US2047931A (en) 1935-10-29 1935-11-15 Electric switch
US49931A Expired - Lifetime US2155244A (en) 1935-10-29 1935-11-15 Electric switch
US49927A Expired - Lifetime US2142153A (en) 1935-10-29 1935-11-15 Electric switch
US49928A Expired - Lifetime US2073529A (en) 1935-10-29 1935-11-15 Electric switch
US49930A Expired - Lifetime US2142152A (en) 1935-10-29 1935-11-15 Electric switch
US63527A Expired - Lifetime US2153000A (en) 1935-10-29 1936-02-12 Ceramic body
US70063A Expired - Lifetime US2142154A (en) 1935-10-29 1936-03-21 Electric switch
US185175A Expired - Lifetime US2142156A (en) 1935-10-29 1938-01-15 Electric switch

Country Status (4)

Country Link
US (11) US2101115A (en)
DE (4) DE664792C (en)
FR (1) FR830093A (en)
GB (5) GB471087A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2434065A (en) * 1945-12-29 1948-01-06 Joseph F Courtney Illuminated safety switch
US2575318A (en) * 1948-01-08 1951-11-13 Minncapolis Honeyweel Regulato Mercury switch
US2580302A (en) * 1948-01-02 1951-12-25 Vincent W Jones Fluid type switch
DE1141358B (en) * 1958-06-02 1962-12-20 Gen Elek C Company Mercury rotary capsule switch with a partition made of insulating material in a metal housing
US3313903A (en) * 1965-06-10 1967-04-11 Hubbell Inc Harvey Liquid contact switch for controlling plural circuits

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2578494A (en) * 1949-05-27 1951-12-11 Wiggins Harry Shaw Electric switch
US2647177A (en) * 1950-02-25 1953-07-28 Knapp Monarch Co Double break switch
US2670421A (en) * 1952-03-29 1954-02-23 Gen Electric Roll type mercury switch
US2749413A (en) * 1952-10-06 1956-06-05 Lee T Bordner Electric switch
DE1195418B (en) * 1954-05-04 1965-06-24 Henschel Werke Ag Liquid contacts, especially for large currents and sliding speeds
US2784279A (en) * 1954-08-30 1957-03-05 Gen Electric Mercury switch
US2872551A (en) * 1956-12-27 1959-02-03 Westinghouse Electric Corp Electric wiring device
US2891133A (en) * 1957-08-27 1959-06-16 Gen Electric Electric heater control assembly
US2936347A (en) * 1958-10-24 1960-05-10 Cutler Hammer Inc Electric switch
US3088003A (en) * 1960-05-24 1963-04-30 Sherman S Fishman Electro-mechanical switch
CA781578A (en) * 1963-01-30 1968-03-26 L. Hamilton William Mercury button switch with horizontal handle
DE1259994B (en) * 1964-11-26 1968-02-01 Oskar Von Mossin Contact device for transmitting electrical currents between conductors which can be rotated relative to one another
US3415965A (en) * 1967-04-17 1968-12-10 Gen Electric Mercury button switch
US3946186A (en) * 1973-12-26 1976-03-23 The Grigoleit Company Rocker actuating mechanism
US4144431A (en) * 1977-05-19 1979-03-13 Elenbaas George H Means of securing mecury displacement switches to a mounting bracket
US20080118878A1 (en) * 2006-11-17 2008-05-22 Banner Engineering & Sales, Inc. Combustible fuel igniting apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2434065A (en) * 1945-12-29 1948-01-06 Joseph F Courtney Illuminated safety switch
US2580302A (en) * 1948-01-02 1951-12-25 Vincent W Jones Fluid type switch
US2575318A (en) * 1948-01-08 1951-11-13 Minncapolis Honeyweel Regulato Mercury switch
DE1141358B (en) * 1958-06-02 1962-12-20 Gen Elek C Company Mercury rotary capsule switch with a partition made of insulating material in a metal housing
US3313903A (en) * 1965-06-10 1967-04-11 Hubbell Inc Harvey Liquid contact switch for controlling plural circuits

Also Published As

Publication number Publication date
US2142152A (en) 1939-01-03
US2142151A (en) 1939-01-03
DE674913C (en) 1939-04-25
GB466258A (en) 1937-05-25
US2153000A (en) 1939-04-04
US2073529A (en) 1937-03-09
US2142154A (en) 1939-01-03
US2101115A (en) 1937-12-07
DE682879C (en) 1939-10-23
US2047931A (en) 1936-07-14
US2142156A (en) 1939-01-03
DE670428C (en) 1939-01-18
GB462527A (en) 1937-03-10
DE664792C (en) 1938-09-12
GB471087A (en) 1937-08-27
FR830093A (en) 1938-07-20
US2155244A (en) 1939-04-18
GB466257A (en) 1937-05-25
GB467068A (en) 1937-06-10
US2142153A (en) 1939-01-03

Similar Documents

Publication Publication Date Title
US2101093A (en) Barrier for mercury switches
US2312672A (en) Switching device
US2142155A (en) Electric switch
US2773954A (en) Snap action switch
US2821589A (en) Three-way toggle switch
US3470341A (en) Vacuum switch with liquid filled bellows operation
US3098141A (en) Enclosed precision switch
US2324798A (en) Switch
US2740028A (en) Variable resistance devices
US2899513A (en) schmidt
US3624323A (en) Microswitch
US1666338A (en) Electric switch
US2232627A (en) Electric switch
US3161749A (en) Vacuum relay
US3755643A (en) Tilt actuated liquid metal switch having a negative break angle
US2819362A (en) Switches
US2342354A (en) Metal-clad switch
US2241469A (en) Electric snap switch
US2551520A (en) Mercury switch
US2163460A (en) Fuse block
US1897454A (en) Low resistance fluid flow switch
US2121569A (en) Electric switch
US2194239A (en) Mercury switch
US922033A (en) Movable contact for electric switches.
US2192031A (en) Electric switch