Patents Assigned to Haley & Weller Limited
  • Non-disruptive detonating cord
    Patent number: 4991511
    Abstract: The cord system comprises a relatively thin detonating cord which can be readily bent round small diameter corners and is of low weight per unit length, the cord comprising an outer relatively thick tube and an inner relatively thin tube of a different material of greater density than the outer tube, the secondary explosive for detonation being within the inner tube. When ignited the cord remains thereby protecting any apparatus positioned close to it from damage by the explosion contained within the cord.
    Type: Grant
    Filed: October 25, 1989
    Date of Patent: February 12, 1991
    Assignee: Haley & Weller Limited
    Inventor: Geoffrey M. Simpson
  • Pyrotechnic assembly
    Patent number: 4791870
    Abstract: A pyrotechnic assembly has an outer container for a plurality of pyrotechnic elements, each of which has a propellant charge, to propel the element out of the container, and a pyrotechnic charge, for example for producing a radiation-blocking screen. The container may be used as a fixed launcher for the elements or may itself be a projectile or missile from which the elements are ejected in flight. A plurality of different pyrotechnic charges may be included in the element.
    Type: Grant
    Filed: April 4, 1984
    Date of Patent: December 20, 1988
    Assignee: Haley & Weller Limited
    Inventor: Geoffrey M. Simpson
  • Pyrotechnic composition for producing radiation-blocking screen
    Patent number: 4728375
    Abstract: A pyrotechnic composition for producing a screen for blocking the passage of infra-red radiation and of light, comprises phosphorus, preferably red amorphous phosphorus, dispersed in a binding agent, for example rubber. The composition is produced by forming the binding agent into a gel with solvent, dispersing the phosphorus into the gel, evaporating off solvent, and comminuting the resulting solid material.
    Type: Grant
    Filed: April 4, 1984
    Date of Patent: March 1, 1988
    Assignee: Haley & Weller Limited
    Inventor: Geoffrey M. Simpson
  • Pyrotechnic or explosive device
    Patent number: 4617866
    Abstract: A pyrotechnic or explosive device comprises a pyrotechnic or explosive charge and an electrical firing circuit therefor. The firing circuit includes a source of electrical energy, an electrical firing element to ignite the charge, and an electric switch connected between the energy source and the firing element. The switch includes biasing means and manually engageable means for holding the switch open against the biasing means. Delay means, either pyrotechnic or electrical, are preferably included.
    Type: Grant
    Filed: May 16, 1984
    Date of Patent: October 21, 1986
    Assignee: Haley & Weller Limited
    Inventor: Geoffrey M. Simpson