Patents Assigned to Establissements Petzel
  • Electric lamp with a single device for focus-control and switch-control
    Patent number: 4429351
    Abstract: An electric lamp with a parabolic reflector in a threaded collar, provided with a device for adjusting the focus by relative displacement between the bulb and the reflector which occurs when turning the collar on its threads between first and second adjusting positions. The device furthermore controls a switch housed within the casing for the device. The device is particularly applicable as an electric headlamp for mountain-climbers or spelunkers.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: January 31, 1984
    Assignee: Establissements Petzel
    Inventors: Paul Petzl, Pierre Petzl