Back to results
US 4,642,593 AGranted
Impulse mercury relay with magnetic interlock switch
OwnerGeorge H. Elenbaasinventor
Life of this patent
Estimating the term…
Abstract
An impulse mercury relay with magnetic interlock switch is provided comprising a first electrode member containing a body of a liquid conductor therein, a second electrode member received and secured inthe first electrode member, and a displacement plunger movable in the first electrode member to cause contact between the liquid conductor and second electrode member. A magnet device is movable with the displacement plunger, and a magnetically-actuable switch externally disposed of the first electrode member is actuated by the magnet when moved with the displacement plunger. A holding device is also provided to magnetically hold the displacement plunger at the desired position when the coil device is deenergized.
Claims41
A liquid conductor relay, comprising:
- a first electrode member having a top portion and a bottom portion,
- a liquid conductor contained in said first electrode member,
- a second electrode member received and secured in said first electrode member,
- a displacement plunger in said first electrode member and movable between a first position wherein said liquid conductor and said second electrode member are in spaced-apart relation and a second position wherein said displacement plunger is displaced downwardly in said liquid conductor to displace said liquid conductor upwardly in contact with said second electrode member,
- a coil means in proximity to said first electrode member for moving said displacement plunger from said first position to said second position when energized, said displacement plunger moving from said second position to said first position when said coil means is deenergized,
- a magnet means movable with said displacement plunger between said first and said second positions, and
- a magnetically-actuable switch means externally disposed of said first electrode member and in close proximity thereto, said magnetically-actuable switch means being actuated by said magnet means and said liquid conductor being in contact with said second electrode member when said coil means moves said displacement plunger and said magnet means from said first position to said second position.
4 more elements
A liquid conductor relay, comprising:
- a first electrode member having a top portion and a bottom portion.
- a liquid conductor contained in said first electrode member,
- a second electrode member received and secured in said first electrode member,
- a displacement plunger in said first electrode member and movable between a first position wherein said liquid conductor and said second electrode member are in spaced-apart relation and a second position wherein said displacement plunger is displaced downwardly in said liquid conductor to displace said liquid conductor upwardly in contact with said second electrode member,
- a coil means in proximity to said first electrode member for moving said displacement plunger from said first position to said second position when energized,
- one of a magnet means and a ferromagnetic holding means disposed on a bottom portion of said displacement plunger and movable with said displacement plunger between said first and said second positions,
- the other of said magnet means and said ferromagnetic holding means secured to said bottom portion of said first electrode member, the magnetic attraction between said magnet means and said ferromagnetic holding means being sufficient to hold said displacement plunger at said second position when said coil means is deenergized, thereby maintaining electrical contact between said liquid conductor and said second electrode member.
4 more elements
A liquid conductor relay, comprising:
- a first electrode member having a top portion and a bottom portion,
- a liquid conductor contained in said first electrode member,
- a second electrode member received and secured in said first electrode member,
- a displacement plunger in said first electrode member and movable between a first position wherein said liquid conductor and said second electrode member are in spaced-apart relation and a second position wherein said displacement plunger is displaced downwardly in said liquid conductor to displace said liquid conductor upwardly in contact with said second electrode member,
- a first coil means in proximity to said first electrode member for moving said displacement plunger from said first position to said second position when energized,
- a magnet means externally disposed adjacently to said bottom portion of said first electrode member, said magnet means magnetically holding said displacement plunger at said second position when said first coil means is deenergized,
- a magnetically-actuable switch means externally disposed of said first electrode member and in close proximity to said magnet means, said magnetically-actuable switch means being actuated by said magnet means when said displacement plunger is at said first position, and
- a second coil means in proximity to said first electrode member for overcoming the magnetic attraction between said magnet means and said displacement plunger at said second position, said displacement plunger moving from said first position to said second position when said second coil means is energized,
- said displacement plunger being made of a material having sufficiently low permeance to substantially decrease the magnetic field strength of said magnet means when at said second position to thereby deactuate said switch means.
6 more elements
Dependencies are inferred from the claim text.