×

Cordless electric devices having rechargeable battery pack(s)

  • US 4,084,123 A
  • Filed: 08/25/1975
  • Issued: 04/11/1978
  • Est. Priority Date: 08/25/1975
  • Status: Expired due to Term
First Claim
Patent Images

1. A rechargeable battery pack for external mounting in a portable device comprising an elongated substantially rectangular box-like housing having at least one substantially rectangular flat base wall and side walls, the area of the base wall being greater than the area of any of the side walls and containing electrical battery means, a rectifier and a pair of external contact blades projecting rigidly from said base wall of the pack housing, said blades being adapted for insertion into a conventional household electrical outlet, said blades being disposed intermediate the length and width of said base wall, a circuit within said pack housing comprising a switch having connections to said rectifier and battery means and having an actuator adjacent said base wall, said switch being spring biased to connect said battery means to said blades through said rectifier when the pack is not mounted on the device and adapted to being actuated by means on the device to connect the battery means to discharge through the blades upon mounting the pack in said device, and releasable latch means mounted on one end of said pack housing enabling said pack housing to be releasably secured in a mating outwardly opening recess of said device.

View all claims
  • 10 Assignments
Timeline View
Assignment View
    ×
    ×