Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1990-03-14
1992-05-05
Hickey, R. J.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
429 1, 439504, H01M 200, H01M 1046, H01R 1100, H01R 430
Patent
active
051111306
ABSTRACT:
A safety device for an automobile battery has a light for indicating when jumper cables are properly attached to the battery, and a switch for electrically connecting a jumper cable attached to the device with a battery terminal. The device has a non-conductive housing supporting a fixed contact in electrical connection with one terminal of the battery by means of an integral clamp. A movable contact is formed by two metal plates on opposite sides of a head of the fixed contact, the plates being adapted to receive and be gripped between the jaws of a jumper cable clamp. The jumper cable clamp biases the plates toward the fixed contact. The device normally is in a non-conductive mode, in which the plates are prevented from moving together by one end of a lever disposed between the plates. The other end of the lever extends outside of the housing and has a handle. The lever is biased into the non-conductive position by a spring. The device also has an LED which lights when the clamp has the same polarity as the terminal to which the device is mounted. A user, in response to seeing the light, presses the handle to move the lever into a position where it moves out of the way of the plates allowing them to close against the head of the fixed contact. The lever will automatically move to the non-conductive position upon removal of the clamp. There is also an adaptor on which the device mounts when in a car with a side mount battery. In another embodiment of the invention, there is a ratchet for quickly and easily connecting or disconnecting battery terminals. The ratchet has a male or female threaded plug, and acts as a bolt or nut, respectively. The ratchet handle normally engages the plug so that the plug rotates with the handle. Tightly gripping the handle disengages the plug so that the handle rotates freely with respect to the plug.
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