US3261942A - Reed contact with ball-shaped armature - Google Patents

Reed contact with ball-shaped armature Download PDF

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Publication number
US3261942A
US3261942A US368535A US36853564A US3261942A US 3261942 A US3261942 A US 3261942A US 368535 A US368535 A US 368535A US 36853564 A US36853564 A US 36853564A US 3261942 A US3261942 A US 3261942A
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Prior art keywords
contact
rods
ball
envelope
armature
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Expired - Lifetime
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US368535A
Inventor
Gerhard Wessel
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International Standard Electric Corp
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International Standard Electric Corp
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Priority claimed from DEST16372U external-priority patent/DE1895214U/en
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Priority to US368535A priority Critical patent/US3261942A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/28—Relays having both armature and contacts within a sealed casing outside which the operating coil is located, e.g. contact carried by a magnetic leaf spring or reed
    • H01H51/288—Freely suspended contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/16—Contacts characterised by the manner in which co-operating contacts engage by abutting by rolling; by wrapping; Roller or ball contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/64—Protective enclosures, baffle plates, or screens for contacts
    • H01H1/66—Contacts sealed in an evacuated or gas-filled envelope, e.g. magnetic dry-reed contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H01H36/0006—Permanent magnet actuating reed switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H01H36/0006—Permanent magnet actuating reed switches
    • H01H36/0013—Permanent magnet actuating reed switches characterised by the co-operation between reed switch and permanent magnet; Magnetic circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H01H36/008—Change of magnetic field wherein the magnet and switch are fixed, e.g. by shielding or relative movements of armature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/60—Contact arrangements moving contact being rigidly combined with movable part of magnetic circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/28—Relays having both armature and contacts within a sealed casing outside which the operating coil is located, e.g. contact carried by a magnetic leaf spring or reed
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/16—Indicators for switching condition, e.g. "on" or "off"

Definitions

  • the invention relates to a reed contact in which the freely movable armature within the reed contact tube is in the shape of a ball.
  • the ball is made from magnetic material and is held in position under the influence of at least one permanent magnet.
  • Known electro-magnetic relays have an armature, preferably ball-shaped, freely movable in the working air gap of the relay.
  • the ball armature is held under the influence of at least one permanent magnet.
  • the iron core of this relay is made of two straight rods, preferably with round profile, which are arranged successively and which limit with their opposite ends the working air gap.
  • the permanent magnet or magnets are designed as fiat construction elements, preferably rectangularshaped, and arranged in parallel to the plane in which the rods are located.
  • the object of the invention is to provide a reed contact relay which consists of elements that are easily constructed. Another object is to provide reed contacts which can be used as make-, break-, or switch-over-contacts, depending on the wiring connected to the ends protruding from the tube.
  • reed-type contacts are of particularly small dimensions. According to the invention, particular care has been taken so that a large part of the ball surface of the armature will be used for contact making. This is achieved, according to the invention, by the use of rodshaped contacts which are bent hairpin shaped in both ends of the reed tube, the rod-shaped contacts are melted into the tube in the way known. The open ends of the hairpins are opposite each other within the tube and hold the ball-shaped armature between them. Their closed, bent ends are located outside the tube. After having been melted in, these ends are separated in a way known, so that four electrically separated contact points are ob tained. The rods formed on either front side of the two contacting points are in parallel in one plane.
  • the contact rods located parallel and in one plane are staggered by 90 with respect to the other two contact rods.
  • the free ends of the contact rods within the tube, and located opposite each other are chamfered in such a way that the surface obtained by the chamfering shows to the central axis of the tube.
  • the contact rod pairs located within a plane are chamfered in a varying angle, so that the ball-shaped armature will be set into a rotating motion during the switching of the contacts, in order to use the entire ball surface for contact making during the numerous switchings to be performed during its life expectancy.
  • An advantage of the invention is that the reed has a small design and can be used as a contact for push buttons or push button controlled systems.
  • a further advantage is that by using equal construction elements within a reed contact, a suitable connection may be made within a circuit by connecting the lugs protruding from the tube in a make-contact, a break-contact, or a switchover-contact configuration.
  • FIG. 1 shows a reed contact according to the invention seen from the side in section and essentially enlarged
  • FIG. 2 shows a contact according to FIG. 1 in perspective view
  • FIG. 3 shows a cross-section through the contact in FIG. 2, taken along the line AA.
  • FIG. 1 shows a reed armature tube marked with the FIGURE 1.
  • the reed tube may be made of glass into which on either front side 2 and 3 respectively hair-pin-bent contact elements 4 and 5 are meltedin. Within the tube between these contact elements 4 and 5, is a ball-shaped armature 6.
  • a permanent magnet 7 will be slid in the longitudinal direction of the reed tube in a way knonw.
  • the permanent magnet 7 may consist of a longitudinal or rectangular ferrite magnet or of an annular magnet which will be slid over the tube.
  • the contact rods 5 and 5" of the contact element 5 are in parallel in one plane. The same applies for the contact rods 4' and 4" of the contact element 4. Within the tube 1, however, these planes between the melting-in point 2 and the melting-in point 3 are vertically to each other.
  • the contact rods 4, 4", 5', and 5", are chamfered at their free edges within the tube. The free edges slant in such a way that the surface obtained by the chamfering, as for example shown at the points 8 or 9, shows to the centre axis of the tube and in the longitudinal direction of the tube 1. Besides, the chamfering is made in varying angles as shown at the points 8 and 9.
  • the contacting ends of the rods 5' and 5" touch the ball armature in a manner such that the ball is put into a rotating motion during the switching process in order to use the entire ball surface for contact-making during the life of the reed Contact.
  • FIG. 2 shows the contact of FIG. 1 in a perspective view.
  • the contact elements 4 and 5 will be separated at the points BB after melting-in. If, e.g., a circuit is only connected to both contact rods 4 and 4", the armature 6 bridges these two contact rods at the position of the permanent magnet 7 as shown in FIG. 2, thus obtaining a break-contact between the contact rods 4' and 4". If, on the other hand, the contact rods 5' and 5" are wired into the circuit, there is no connection between these contact rods when armature 6 is held by the flux of the permanent magnet 7 in the position as shown in FIG. 2.
  • the armature 6 within the tube 1 will be moved also in direction of the arrow. This motion disconnects the break-contact between the contact rods 4 and 4" and provides a connection between the contact rods 5' and 5" (make-contact). If, for example, the contact rods 4" and 5" are so connected outside the tube, the function of a switch-over contact is obtained without any change of the interior design of the contact.
  • the contact can be alternately used as break-contact only, as make-contact only, as breakand make-contact, or as a switch-over-contact.
  • FIG. 3 shows, without the ball-shaped armature 6, a cross-section taken along the line AA of FIG. 2.
  • the contact element rods 5' and 5" are parallel in one plane and are vertical to the plane formed by the contact rods 4 and 4".
  • the contact elements 4 and 5, and the ball-shaped armature 6 consist of a material which is magnetizable and which has an expansion coeflicient that is adapted to the glass.
  • the contact elements 4 and 5, and the ball-shaped armature 6 are surface-treated according to a suitable method in order to make a suitable electrical conductivity, particularly at the contact-making points.
  • a glass reed type contact assembly comprising an elongated glass envelope having a pair of rods sealed into each end of the envelope, each of said rods being oriented to provide a pair of spaced parallel rods inside the envelope, the ends of said rods forming four separate electrical contacts outside the envelope, a ball-shaped armature inside the envelope positioned to roll between said four electrical contacts, and means comprising a permanent magnet outside said envelope to control the position of said ball armature wherein the contact ends of said rods are chamfered to provide tangential surfaces for touching said ball when it makes contact therewith, the contact ends of said rods being chamfered at different angles to cause said ball armature to rotate during the switching process.
  • each of said pairs of rods form two contacts which are side by side in one plane.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Push-Button Switches (AREA)
  • Manufacture Of Switches (AREA)
  • Linear Motors (AREA)
  • Thermally Actuated Switches (AREA)

Description

July 19, 1966 e. WESSEL 3,261,942
REED CONTACT WITH BALL-SHAPED ARMATURE Filed May 19, 1964 2 Sheets-Sheet 1 July 19, 1966 s. WESSEL 3,261,942
REED CONTACT WITH BALD-SHAPED ARMA'IURE Filed May 19, 1964 2 Sheets-Sheet 2 United. States Patent ternational Standard Electric Corporation, New York,-
N.Y., a corporation of Delaware Filed May 19, 1964, Ser. No. 368,535 3 Claims. (Cl. 200-87) The invention relates to a reed contact in which the freely movable armature within the reed contact tube is in the shape of a ball. The ball is made from magnetic material and is held in position under the influence of at least one permanent magnet.
Known electro-magnetic relays have an armature, preferably ball-shaped, freely movable in the working air gap of the relay. The ball armature is held under the influence of at least one permanent magnet. The iron core of this relay is made of two straight rods, preferably with round profile, which are arranged successively and which limit with their opposite ends the working air gap. The permanent magnet or magnets are designed as fiat construction elements, preferably rectangularshaped, and arranged in parallel to the plane in which the rods are located. This known arrangement of reed contact relays with ball-shaped armature is, however, very expensive and difiicult to produce.
The object of the invention is to provide a reed contact relay which consists of elements that are easily constructed. Another object is to provide reed contacts which can be used as make-, break-, or switch-over-contacts, depending on the wiring connected to the ends protruding from the tube.
These reed-type contacts are of particularly small dimensions. According to the invention, particular care has been taken so that a large part of the ball surface of the armature will be used for contact making. This is achieved, according to the invention, by the use of rodshaped contacts which are bent hairpin shaped in both ends of the reed tube, the rod-shaped contacts are melted into the tube in the way known. The open ends of the hairpins are opposite each other within the tube and hold the ball-shaped armature between them. Their closed, bent ends are located outside the tube. After having been melted in, these ends are separated in a way known, so that four electrically separated contact points are ob tained. The rods formed on either front side of the two contacting points are in parallel in one plane.
According to an embodiment of the invention the contact rods located parallel and in one plane are staggered by 90 with respect to the other two contact rods.
According to a further embodiment of the invention, the free ends of the contact rods within the tube, and located opposite each other, are chamfered in such a way that the surface obtained by the chamfering shows to the central axis of the tube.
According to a further embodiment of the invention the contact rod pairs located within a plane are chamfered in a varying angle, so that the ball-shaped armature will be set into a rotating motion during the switching of the contacts, in order to use the entire ball surface for contact making during the numerous switchings to be performed during its life expectancy.
An advantage of the invention is that the reed has a small design and can be used as a contact for push buttons or push button controlled systems. A further advantage is that by using equal construction elements within a reed contact, a suitable connection may be made within a circuit by connecting the lugs protruding from the tube in a make-contact, a break-contact, or a switchover-contact configuration. There is no necessity for additional tools for manufacturing in order to obtain contacts with varying functions. Furthermore, it is necessary to have separate supply for each of the individual 3,261,942 Patented July 19, 1966 contact types. Since the contact pins within the tube are chamfered in a different angle, the ball receives a rotative motion during the switching process whereby in the course of the switching processes during the contacts life expectancy the entire ball surface is used for contact making.
The invention will now in detail be explained with the aid of an example and the accompanying drawings in which:
FIG. 1 shows a reed contact according to the invention seen from the side in section and essentially enlarged,
FIG. 2 shows a contact according to FIG. 1 in perspective view, and
FIG. 3 shows a cross-section through the contact in FIG. 2, taken along the line AA.
FIG. 1 shows a reed armature tube marked with the FIGURE 1. For example, the reed tube may be made of glass into which on either front side 2 and 3 respectively hair-pin- bent contact elements 4 and 5 are meltedin. Within the tube between these contact elements 4 and 5, is a ball-shaped armature 6.
Outside the reed tube 1 a permanent magnet 7 will be slid in the longitudinal direction of the reed tube in a way knonw. The permanent magnet 7 may consist of a longitudinal or rectangular ferrite magnet or of an annular magnet which will be slid over the tube. After melting into the tube 1 at the corresponding front side 2 and 3, the contacting elements 4 and 5 will be separated along the lines BB. Thus, for example, from the contact element 4 are made two electrically insulated contacting rods 4' and 4", and from the contact element 5 are made two separated contact elements 5 and 5".
The contact rods 5 and 5" of the contact element 5 are in parallel in one plane. The same applies for the contact rods 4' and 4" of the contact element 4. Within the tube 1, however, these planes between the melting-in point 2 and the melting-in point 3 are vertically to each other. The contact rods 4, 4", 5', and 5", are chamfered at their free edges within the tube. The free edges slant in such a way that the surface obtained by the chamfering, as for example shown at the points 8 or 9, shows to the centre axis of the tube and in the longitudinal direction of the tube 1. Besides, the chamfering is made in varying angles as shown at the points 8 and 9. Hence, the contacting ends of the rods 5' and 5" touch the ball armature in a manner such that the ball is put into a rotating motion during the switching process in order to use the entire ball surface for contact-making during the life of the reed Contact.
For a clear understanding, FIG. 2 shows the contact of FIG. 1 in a perspective view. As already described in FIG. 1, the contact elements 4 and 5 will be separated at the points BB after melting-in. If, e.g., a circuit is only connected to both contact rods 4 and 4", the armature 6 bridges these two contact rods at the position of the permanent magnet 7 as shown in FIG. 2, thus obtaining a break-contact between the contact rods 4' and 4". If, on the other hand, the contact rods 5' and 5" are wired into the circuit, there is no connection between these contact rods when armature 6 is held by the flux of the permanent magnet 7 in the position as shown in FIG. 2.
When the permanent magnet 7 is moved in the direction of the arrow, which can be either by a push botton operation or the like, the armature 6 within the tube 1 will be moved also in direction of the arrow. This motion disconnects the break-contact between the contact rods 4 and 4" and provides a connection between the contact rods 5' and 5" (make-contact). If, for example, the contact rods 4" and 5" are so connected outside the tube, the function of a switch-over contact is obtained without any change of the interior design of the contact.
By the favourable design of the reed contact, the contact can be alternately used as break-contact only, as make-contact only, as breakand make-contact, or as a switch-over-contact.
FIG. 3 shows, without the ball-shaped armature 6, a cross-section taken along the line AA of FIG. 2. In this representation, it is particularly emphasized that, for example, the contact element rods 5' and 5" are parallel in one plane and are vertical to the plane formed by the contact rods 4 and 4". The contact elements 4 and 5, and the ball-shaped armature 6 consist of a material which is magnetizable and which has an expansion coeflicient that is adapted to the glass. The contact elements 4 and 5, and the ball-shaped armature 6 are surface-treated according to a suitable method in order to make a suitable electrical conductivity, particularly at the contact-making points.
While I have described above the principles of my invention in connection with specific apparatus, it is to be clearly understood that this description is made only by way of example and not as a limitation to the scope of my invention as set forth in the objects thereof and in the accompanying claims.
What I claim is:
1. A glass reed type contact assembly comprising an elongated glass envelope having a pair of rods sealed into each end of the envelope, each of said rods being oriented to provide a pair of spaced parallel rods inside the envelope, the ends of said rods forming four separate electrical contacts outside the envelope, a ball-shaped armature inside the envelope positioned to roll between said four electrical contacts, and means comprising a permanent magnet outside said envelope to control the position of said ball armature wherein the contact ends of said rods are chamfered to provide tangential surfaces for touching said ball when it makes contact therewith, the contact ends of said rods being chamfered at different angles to cause said ball armature to rotate during the switching process.
2. The assembly of claim 1 wherein each of said pairs of rods form two contacts which are side by side in one plane.
3. The assembly of claim 2 wherein the two contacts formed by said one pair of rods lie in a plane which is set at 90 with respect to the plane of the two contacts formed by the other pair of said rods.
References Cited by the Examiner UNITED STATES PATENTS 2,715,166 9/1955 Fitch 20087 2,732,464 1/1956 Ohl 200--87 2,892,051 6/1959 Moore 2008l.9 2,980,776 4/1961 Ovshinsky 200-87 2,995,635 8/1961 Ovshinsky et a1 20087 3,059,074 10/1962 Dal Bianco et a1 20087 BERNARD A. GILHEANY, Primary Examiner.
B. DOBECK, Assistant Examiner.

Claims (1)

1. A GLASS REED TYPE CONTACT ASSEMBLY COMPRISING AN ELONGATED GLASS ENVELOPE HAVING A PAIR OF RODS SEALED INTO EACH END OF THE ENVELOPE, EACH OF SAID RODS BEING ORIENTED TO PROVIDE A PAIR OF SPACED PARALLEL RODS INSIDE THE ENVELOPE, THE ENDS OF SAID RODS FORMING FOUR SEPARATE ELECTRICAL CONTACT OUTSIDE THE ENVELOPE, A BALL-SHAPE ARMATURE INSIDE THE ENVELOPE POSITIONED TO ROLL BETWEEN SAID FOUR ELECTRICAL CONTACTS, AND MEANS COMPRISING A PERMANENT MAGNET OUTSIDE SAID ENVELOPE TO CONTROL THE POSITION OF SAID BALL ARMATURE WHEREIN THE CONTACT ENDS OF SAID RODS ARE CHAMFERED TO PROVIDED TANGENITAL SURFACES FOR TOUCHING SAID BALL WHEN IT MAKES CONTACT THEREWITH, THE CONTACT ENDS OF SAID RODS BEING CHAMFERED AT DIFFERENT ANGLES TO CAUSE SAID BALL ARMATURE TO ROTATE DURING THE SWITCHING PROCESS.
US368535A 1962-10-20 1964-05-19 Reed contact with ball-shaped armature Expired - Lifetime US3261942A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US368535A US3261942A (en) 1962-10-20 1964-05-19 Reed contact with ball-shaped armature

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
DEST19872A DE1219588B (en) 1962-10-20 1962-10-20 Protective tube contact with ball anchor
FR916162A FR1347245A (en) 1962-10-20 1962-11-21 Electromagnetic relays
DEST21064A DE1228328B (en) 1962-10-20 1963-09-12 Protective tube contact
DEST16372U DE1895214U (en) 1963-09-14 1963-09-14 RELAY WITH PROTECTIVE TUBE CONTACTS.
DEST21101A DE1300607B (en) 1962-10-20 1963-09-21 Push and pull button with protection tube anchor contact
US368535A US3261942A (en) 1962-10-20 1964-05-19 Reed contact with ball-shaped armature
DEST024201 1965-07-30

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US3261942A true US3261942A (en) 1966-07-19

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US368535A Expired - Lifetime US3261942A (en) 1962-10-20 1964-05-19 Reed contact with ball-shaped armature
US393996A Expired - Lifetime US3289129A (en) 1962-10-20 1964-09-02 Push and pull key with reed contacts
US563186A Expired - Lifetime US3356948A (en) 1962-10-20 1966-07-06 Electrical switching unit, controlled through permanent magnets with a reed contact, having a freely movable armature

Family Applications After (2)

Application Number Title Priority Date Filing Date
US393996A Expired - Lifetime US3289129A (en) 1962-10-20 1964-09-02 Push and pull key with reed contacts
US563186A Expired - Lifetime US3356948A (en) 1962-10-20 1966-07-06 Electrical switching unit, controlled through permanent magnets with a reed contact, having a freely movable armature

Country Status (7)

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US (3) US3261942A (en)
BE (1) BE684763A (en)
CH (1) CH410113A (en)
DE (3) DE1219588B (en)
FR (5) FR1347245A (en)
GB (3) GB983615A (en)
NL (2) NL6410889A (en)

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US3347995A (en) * 1963-08-03 1967-10-17 Int Standard Electric Corp Make before break ball type armature reed relay switching network
US3356948A (en) * 1962-10-20 1967-12-05 Int Standard Electric Corp Electrical switching unit, controlled through permanent magnets with a reed contact, having a freely movable armature
US3361995A (en) * 1966-03-24 1968-01-02 Gen Equip & Mfg Magnetic proximity switch
US3454724A (en) * 1964-05-20 1969-07-08 Int Standard Electric Corp Key controlled direct current signalling systems
US3768600A (en) * 1971-11-08 1973-10-30 Safety Skate Co Inc Silencer for boxcar retarders
US4128823A (en) * 1975-12-25 1978-12-05 Fujitsu Limited Switch
US4191935A (en) * 1978-02-10 1980-03-04 Bell Telephone Laboratories, Incorporated Twin path reed spring relay construction
US4238748A (en) * 1977-05-27 1980-12-09 Orega Circuits Et Commutation Magnetically controlled switch with wetted contact
US4481389A (en) * 1982-08-02 1984-11-06 Liquid Level Lectronics, Inc. Magnetic control device
US20070246672A1 (en) * 2004-04-02 2007-10-25 Sidel Participations Valve Comprising a Magnetic Control Device

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DE1280412B (en) * 1965-05-20 1968-10-17 Standard Elektrik Lorenz Ag Bistable relay with protection tube armature contacts
NL6604016A (en) * 1966-03-26 1967-09-27
DE1665441B1 (en) * 1966-08-18 1971-05-06 Ramstetter Otto Dipl Ing Magnetically operated electrical switch
JPS5228994B1 (en) * 1971-05-10 1977-07-29
FR2392483A1 (en) * 1977-05-25 1978-12-22 Renault MAGNETIC CONTROLLED CONTACTOR
FR2992769B1 (en) * 2012-06-27 2014-08-08 Schneider Electric Ind Sas ELECTRIC CONTACT

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US2892051A (en) * 1956-02-20 1959-06-23 Gems Company Flow indicator
US3059074A (en) * 1957-04-09 1962-10-16 Int Standard Electric Corp Electrical switching device and method for making
US2980776A (en) * 1957-04-29 1961-04-18 Tann Corp Electric control device
US2995635A (en) * 1958-02-24 1961-08-08 Tann Corp Electric control device

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3356948A (en) * 1962-10-20 1967-12-05 Int Standard Electric Corp Electrical switching unit, controlled through permanent magnets with a reed contact, having a freely movable armature
US3347995A (en) * 1963-08-03 1967-10-17 Int Standard Electric Corp Make before break ball type armature reed relay switching network
US3454724A (en) * 1964-05-20 1969-07-08 Int Standard Electric Corp Key controlled direct current signalling systems
US3361995A (en) * 1966-03-24 1968-01-02 Gen Equip & Mfg Magnetic proximity switch
US3768600A (en) * 1971-11-08 1973-10-30 Safety Skate Co Inc Silencer for boxcar retarders
US4128823A (en) * 1975-12-25 1978-12-05 Fujitsu Limited Switch
US4238748A (en) * 1977-05-27 1980-12-09 Orega Circuits Et Commutation Magnetically controlled switch with wetted contact
US4191935A (en) * 1978-02-10 1980-03-04 Bell Telephone Laboratories, Incorporated Twin path reed spring relay construction
US4481389A (en) * 1982-08-02 1984-11-06 Liquid Level Lectronics, Inc. Magnetic control device
US20070246672A1 (en) * 2004-04-02 2007-10-25 Sidel Participations Valve Comprising a Magnetic Control Device
US7690625B2 (en) * 2004-04-02 2010-04-06 Sidel Participations Valve comprising a magnetic control device

Also Published As

Publication number Publication date
DE1300607B (en) 1969-08-07
NL6410889A (en) 1965-03-22
GB983615A (en) 1965-02-17
DE1219588B (en) 1966-06-23
BE684763A (en) 1967-01-30
FR1387074A (en) 1965-01-29
NL6610418A (en) 1967-01-31
US3289129A (en) 1966-11-29
FR86428E (en) 1966-02-04
US3356948A (en) 1967-12-05
FR90982E (en) 1968-03-22
CH410113A (en) 1966-03-31
GB1042810A (en) 1966-09-14
DE1228328B (en) 1966-11-10
FR86415E (en) 1966-02-04
FR1347245A (en) 1963-12-27
GB1111918A (en) 1968-05-01

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