摘要:
A portable battery jump start unit includes a portable, plastic, clamshell-type housing including a box-like open-top base and a box-like, open-bottom cover hingedly connected together for movement between open and closed conditions. A lead-acid battery is disposed in the housing, along with a state-of-charge monitoring circuit connected to the battery terminals and including a visible indicator viewable through an aperture in the housing. Cables are connected to the battery terminals and respectively extend through openings formed by cooperating notches in the mating edges of the base and cover, the cables respectively having clamp connectors at their distal ends which can be clamped onto posts projecting laterally outwardly from the sides of the base. A charger jack in the base is connected to the battery terminals for receiving a charger connector.
摘要:
A battery pack has a housing with a plug portion mateably receivable in a socket of a battery-powered power hand tool on which the battery back is designed to be mounted. The battery pack also has a connector cable with a connector plug at its distal end mateably receivable in the tool socket so that the battery pack can be disposed remotely from the tool. The battery pack can be mounted on tools with which it does not mate by use of an adapter having a plug portion mateably receivable in the tool socket, and an adapter socket mateably receiving the battery pack plug portion. Multiple battery packs may be interconnected on a wearable carrier and connected to the tool by a cable with a plug connector.
摘要:
A charging circuit for a lead-acid battery pack includes a sacrificial battery with a voltage less than that required to charge the lead-acid battery and connected across the input terminals of a power converter, which boosts the sacrificial battery voltage to an output voltage sufficient to charge the battery pack. A processor operating under stored program control is connected across the lead-acid battery and monitors its voltage and produces an output signal when the voltage drops below a predetermined level, for triggering the power converter to apply its boosted voltage to the lead-acid battery for charging. The processor program ignores normal battery voltage conditions which occur during normal operation of an associated device powered by the lead-acid battery and will activate the power converter only when the lead-acid battery voltage has reached a significantly low level or has reached a low level for a sufficiently long period of time, to be consistent with a deep discharge condition of the lead-acid battery.
摘要:
A keeper battery pack includes a housing incorporating an array of series-connected alkaline battery cells coupled to a cable extending outside the housing and terminating in a quick-connect connector plug adapted to plug into the charger port of a portable lead-acid battery power pack ofthe type used for jump-starting automotive vehicles. The keeper pack is portable and can maintain the charge on the battery power pack during extended periods of non-use, such as during storage, transportation and the like.
摘要:
A protective housing for a jump-starting battery pack includes a flexible sheet of multi-layered, electrically insulating fabric material including inner and outer nylon layers and a foam padding layer sandwiched therebetween adapted to be folded around the case of a battery pack positioned in the middle of the sheet and held closed by Velcro-type closures. Retaining straps secure the battery pack in place, one of the straps having stacks of secured-together folds positioned on opposite sides of the case to provide supports on which the connector clamps of the battery pack jumper cables can be clamped, with the cables projecting from the open top of the housing to serve as handles.
摘要:
A reversible ratchet device is provided as a low-torque application wrench in the form of an elongated body carrying a ratchet mechanism thereon, the ratchet mechanism being operable under low-torque conditions such as are present with initial driving or final loosening of a workpiece. The device includes the ratchet mechanism carried directly on the body, both being co-axially rotatable with each other and with the workpiece.
摘要:
A tool having a relatively ductile working end for engaging workpieces and a relatively hard non-working portion for driving the tool is disclosed, and a process for making same. The tool is formed with the material in a first state, such as by cold-working, and then only the non-working portion is heat treated to a second state. The working end is thus maintained in the ductile state while the non-working portion is hardened, thus imparting different materials performance characteristics to working end and non-working portion.
摘要:
A reversible ratchet device is provided as a low-torque application wrench in the form of an elongated body carrying a ratchet mechanism thereon, the ratchet mechanism being operable under low-torque conditions such as are present with initial driving or final loosening of a workpiece. The device includes the ratchet mechanism carried directly on the body, both being co-axially rotatable with each other and with the workpiece.
摘要:
A molded tool structure has a non-metallic body and a continuous band of flexible and resilient non-metallic material encompassing the body and bonded to its exterior surface. The body may be a tool or a tool part. Also, the body may have one or more metal inserts insert molded therein, in which case there is a band encompassing each such insert. In one embodiment the body is a socket with inserts at both ends and in another embodiment the body is a driver shank with a double-ended screwdriver bit having a Phillips tip insert molded in the body and a flat-blade tip projecting from the body. The tool structure is molded by placing the flexible and resilient band or bands in a mold cavity, the body material being injected into the cavity so that it flows inside the band or bands and forces each band against the mold at the peripheral of the cavity. Any inserts are positioned in the cavity on suitable fixtures inside the bands so that the material flows between the bands and the inserts.