Burglarproof guard for window lock
US4102546A · kind A · utility
30Cited by
4References
3Claims
0Family size
Inventor
Key dates
| Filing date | Sep 2, 1976 |
| Grant date | Jul 25, 1978 |
| Priority date | — |
| Expiry date | Sep 2, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T292/79
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A shield is provided for installation on double-hung windows to prevent the window lock from being jimmied open from the outside. The shield is a flat plate which is fitted to the top of the lower sash around the base of the lock and spans between the two lock sections to close the space between the two windows. The shield prevents the lock from being opened by means of a thin blade, or the like, inserted up between the two window sashes to disengage the lock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.