Cordless portable electrically powered device
US4064447A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 1976 |
| Grant date | Dec 20, 1977 |
| Priority date | — |
| Expiry date | Aug 16, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S30/01
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cordless electric device has an external side pocket for receiving a battery pack power source. The battery pack includes a pair of standard AC prongs projecting from one flat sidewall. The prongs may be received by a set of openings in the device pocket for powering the tool or may be inserted into an ordinary AC household receptacle for charging the batteries. A spring-loaded switch located on the same pack sidewall has a first normal position for connecting the batteries to a rectifier for charging and a second actuated position for connecting the batteries directly to the prongs for powering the device. The device is provided with a manually operable mechanism for contacting the spring-loaded switch in the pack and thereby switching the pack from a charge to a discharge mode. In a specific embodiment, the actuating mechanism comprises a trigger mounted on a pistol-type soldering gun. The trigger has a movable post member made integral with the trigger for contacting the battery pack switch when the trigger is depressed. The prong contacts in the device may, therefore, be directly connected to the device load unit so that the on-off switching function is performed solely by th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.