Patents Assigned to Hamlin Incorporated
  • Patent number: 5283402
    Abstract: A switch assembly has a magnet (26) mounted for in the vicinity of a reed switch (20). A weight (29) is movable in a direction generally perpendicular to the magnet (26), and is connected thereto by a mechanism (16;38,39,40;44) which translates the movement of the weight to movement of the magnet. The magnet (26) and reed switch (20) are configured so that the reed switch actuates on movement of the magnet.
    Type: Grant
    Filed: December 24, 1992
    Date of Patent: February 1, 1994
    Assignee: Hamlin Incorporated
    Inventor: Terence W. Green
  • Patent number: 4980526
    Abstract: A testing device (11) is applied to an acceleration shock sensor (10) of the type having a reed switch (24) that operates such that the net mass of a magnet (40) is accelerated against a spring (50) upon vehicle impact or rapid deceleration of the vehicle. The change in magnet (40) position causes a change in the magnetic field that activates the reed switch (24). The testing device (11) includes an electromagnetic coil (90) mounted in an area of minimal reed switch (24) sensitivity. The electromagnetic coil (90) is connected to be capable of providing a current flow that creates a magnetic field that opposes the magnetic field of the magnet (40). Upon energizing of the coil (90), the magnet (40) is urged to accelerate in a manner that emulates the acceleration of the magnet (40) caused by vehicle collision.
    Type: Grant
    Filed: April 6, 1989
    Date of Patent: December 25, 1990
    Assignees: Hamlin Incorporated, Daimler-Benz, AG
    Inventor: Daniel R. Reneau
  • Patent number: 4877927
    Abstract: An extended dwell shock sensing device (10) is constructed to operate in two stages. A carriage (34) that includes a magnet (40) is slidably mounted between a first abutment (20) and a second abutment (22). The carriage (34) also includes a cradle (52) in which a non-magnetic mass (54) is slidably mounted between a first wall (53) and a second wall (55). At a rest position, the carriage (34) is biased away from the second abutment (22) by a spring (50) and the non-magnetic mass (54) is biased away from the second wall (55) by a spring (58). A reed switch (24) is mounted to be responsive to the position of the magnet (40). Upon application of an acceleration force, the shock sensing device (10) operates in two stages. In a first stage, the carriage (34) travels to a position where it approaches the second abutment (22), and activates the reed switch (24). In a second stage, the non-magnetic mass (54) travels toward the second wall (55).
    Type: Grant
    Filed: April 6, 1989
    Date of Patent: October 31, 1989
    Assignee: Hamlin Incorporated
    Inventor: Daniel R. Reneau