Unlock instant, AI-driven research and patent intelligence for your innovation.

Latch assembly with dead latch indicator

A technology of lock components and indicators, which is applied in the direction of building locks, buildings, building structures, etc., and can solve the problems of reducing safety and inconvenience

Active Publication Date: 2008-04-30
LOCKWOOD SECURITY PRODS
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can be inconvenient when the user urgently needs to open the door
One solution is to leave the key in the lock, however this reduces the degree of security provided by the snap lock feature

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Latch assembly with dead latch indicator
  • Latch assembly with dead latch indicator
  • Latch assembly with dead latch indicator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] specific implementation

[0025] Figure 1 shows a lock assembly 1 incorporating an embodiment of the invention. The illustrated lock assembly includes a housing 4 housing the internal structure of the lock assembly 1 . The bolt 3 extends to one side of the housing 4 and the first actuator 7 comprises a knob 9 at the front of the housing 4 . Other forms of knob 7 shown such as a handle are also suitable. The housing 4 is shown surface mounted to one side of the door 2, normally the inside. A second actuator 8 in the form of a key operated lock is shown in phantom on the other side of the door 2, normally the outside.

[0026] show on figure 2 The second or external actuator 8 may comprise a key operated lock 10 which in a typical arrangement comprises a main body or cylinder 11 and a cylinder 12 rotatably mounted within cylinder 11 . A tumbler (not shown), such as a pin tumbler, may interact in a known manner between cylinder 11 and cylinder 12 to prevent relative m...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

This application relates to a latch assembly (1) having a first actuator (7) operable from an inner side of the assembly (1) and a second actuator (8) being a key operable actuator operable from the outer side of the assembly. The operation of the first actuator (7) being controlled by a key operated lock (14). The assembly (1) including an indicator means (73) associated with the first actuator (7). The indicator means indicating whether the first actuator (7) is in an operable condition or an inoperable condition.

Description

technical field [0001] The present invention generally relates to a type of lock assembly having an actuator operated from the outside of the assembly and keyed to open, and an additional actuator operated from the inside of the assembly, the additional actuator being controlled by an additional key operated lock. Hereafter, for convenience, the invention will be described with specific reference to a door leaf, although it should be understood that the invention can be applied to any movable member suitable for closing an access opening. Background technique [0002] Lock assemblies of the type described above include a deadbolt retractable to a release position by operation of at least an inner actuator. The inside actuator is usually a turning knob or handle that rotates to retract the deadbolt. Rotation of the knob is controlled by a key-operated lock for improved security. The knob is operable when the lock is inactive and inoperable when the lock is active. Lock ass...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): E05B41/00
Inventor M·布莱克本
Owner LOCKWOOD SECURITY PRODS