Cartridge monitoring and display system for a firearm
US5142805A · kind A · utility
Inventors
Key dates
| Filing date | Mar 4, 1991 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Mar 4, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF41A9/62
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A cartridge monitoring and display system for an automatic or semiautomatic firearm. A programmed microcontroller receives input signals from each of a slide switch and a magazine switch, which switches generate respective signals upon actuation of the firearm slide and upon insertion or withdrawal of a cartridge magazine. The microcontroller calculates the number of rounds remaining in the firearm and displays the number on an LCD display. A visible and audible warning is given when the cartridge count drops below a predetermined minimum level. The entire system is incorporated in a mounting strap which may be inserted between the frame and hand grip of a conventional semiautomatic pistol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.