U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Quotables

"During my service in the United States Congress, I took the initiative in creating the Internet."

Al Gore ; The basis for the later misquote by US Republicans that Gore had "invented" the Internet. Gore was the leading political champion of the modern-day Internet.

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Assignee: Norris Industries


Location: SouthGate, CA
No. of patents: 11

NumberTitleIssue Date
4183565Latch bolt locking mechanism for fire door locksets
To lock the head of a latchbolt in extended, or locked position therein to prevent opening of a door in case of fire the latch bolt head is provided with a spring driven locking pin reciprocatably mounted in a transverse direction. In the extended locked ...
01/15/1980
4169618Plastic door lock
A plastic door lock, sometimes referred to as a door latch, makes use of moldable plastic material for most of the individual parts of the lock assembly with opposite roses adapted to interlock with each other and be held together with a single screw on t...
10/02/1979
4141234Dead bolt guard
A guard mount structure for a dead bolt installation on a door has a preassembled condition wherein a dead bolt subassembly consisting of a housing and a dead bolt shaft is attached to a sheet metal guard. The sheet metal guard has opposite plates for att...
02/27/1979
4123097Sectional entrance handle retract mechanism
For translating the linear motion of a pivotally mounted thumb piece for a front door latch into the rotary motion needed to withdraw a latch bolt, two rotary members are employed. One is a bell crank having a pivotal mounting on the mounting plate at one...
10/31/1978
4109494Simultaneous retract mechanism
The invention involves a mechanism for simultaneously retracting two separate latch bolts which have previously been extended by their individual separate mechanisms. The individual mechanisms comprise a substantially conventional knob actuated latch bolt...
08/29/1978
4109496Trapped key mechanism
A security type dead bolt for a door is arranged so that a key must be used on the inside, as well as on the outside, to extend the dead bolt to locked position, in that way to prevent an unauthorized person opening the door from the inside after surrepti...
08/29/1978
4109948Plastic latch bolt for door lock
A plastic door lock makes use of moldable plastic material for most of the individual parts with opposite roses adapted to interlock with each other and be held together with a single screw on the axial center line of the knobs and accessible from the out...
08/29/1978
4109498Fire sleeve for tubular locks
A resilient sleeve is provided as an accessory to enclose the space around a tubular type door lock mechanism mounted in a hole bored through a door. The diameter of the sleeve is normally larger than the diameter of the bore so that after being contracte...
08/29/1978
4108482Disengaging spindle locking mechanism
A disengaging spindle locking mechanism for the latch bolt of a mortise type lock is actuated by the locking slide which is normally employed to engage a retractor hub to prevent the hub from being rotated. At the inner end of a split spindle where it is ...
08/22/1978
4062579Knob attachment for door latch
A door latch makes use of moldable material for most of the individual parts with opposite roses adapted to interlock with each other and be held together with a single screw on the axial center line of the knobs and accessible from the outside. Prior to ...
12/13/1977
3998080Frangible construction lock system
A pin tumbler lock has a housing, a cylindrical key plug provided with a keyway rotatable in the housing, a shear line between the plug and the housing, pin tumbler bores with aligned parts respectively in the housing and the key plug and spring pressed o...
12/21/1976
 
Sign InRegister
Username  
Password   
forgot password?