Famous Patents
Felix Hoffmann, a German chemist, was searching for something to relieve his father's arthritis. In doing so, he "rediscovered" acetylsalicylic acid and in 1900, patented a stable process for developing it. Hence, we have aspirin.
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.
| Number | Title | Issue Date |
| 4616865 | Security lock assembly Security lock assembly includes a movable lock bolt adapted for mounting to a door, and a striker unit adapted for mounting to a door jamb, which unit defines a bolt cavity. Latch means is mounted for movement to an operative position protruding into the ... | 10/14/1986 |
| 4595220 | Dead bolt sensing and strike closing mechanism A door lock (10) includes a strike case (18) adapted to receive a dead bolt (14). A rotatable keeper (20) is rotatable between an open and closed position for opening and closing the strike case (18). An abutment member (30) is connected to the rotatable ... | 06/17/1986 |
| 4529234 | Electrical operating means for door lock mechanisms A door locking assembly in which the latching mechanism of the assembly comprises a latch bolt operated by rotary means, which can be the door knob or a key operated tumbler, for normally operating the latch bolt, dead lock means for blocking the retracti... | 07/16/1985 |
| 4514001 | Electro-mechanical lock The present invention refers to an improved electro-mechanical lock wherein a connecting rod is articulated at its ends to the bolt and to a lever or crank, the latter being able to rotate about the axis of articulation of the connecting rod, with the spe... | 04/30/1985 |
| 4471983 | Compact electric door opener This disclosure depicts a novel compact electric door opener for use in a hollow metal door frame having an opening and two tabs adjacent the opening. The electric door opener comprises a housing, a solenoid contained within the housing, a conical spring ... | 09/18/1984 |
| 4312197 | Device for preventing or effecting the unlocking of the trunk lid of an automobile vehicle A device comprising a lock with a rotating knob and incorporated bolt, capable of being blocked by the release of the rotating-knob unlocking control. The release results from the shifting of a blocking lever 13, 113 of the plate of the lock. The lever is... | 01/26/1982 |
| 4302039 | Striking box for retaining the bolt of a door lock Striking box for retaining the bolt of a door lock, comprising a bolt stop, an activating device for moving the bolt stop, a signalling switch and a mechanism mounted between the activating device and the bolt stop which ensures that the movement of the b... | 11/24/1981 |
| 4211443 | Electric strike An electric strike having a pivotally mounted keeper for engagement by a door lock bolt or the like having a solenoid control, pivotally mounted locking lever and a pivotally mounted locking cam associated with the lever for releasably retaining the lever... | 07/08/1980 |
| 4056277 | Electric strike An electric strike type door lock in which the strike tongue is releasably held in its latch bolt securing position by a ball seated in a bore in a wall of the housing in which the strike tongue is mounted. Toggle linkage holds the ball in an operative po... | 11/01/1977 |
| 4032180 | Locking device for washing machine door An appliance door lock has a thermally actuable latch regulated by a voltage responsive heater arranged to close the appliance circuit only after the latch has been set, to delay unlatching of the door after interruption of the appliance operation, and to... | 06/28/1977 |
| 4026589 | Door locking mechanism A door lock has both its dead bolt and spring latch released by the action of a single keeper. The keeper has two stable limit positions, i.e. it opens the strike case, or it closes the strike case. The keeper is held in its open position allowing the doo... | 05/31/1977 |
| 4017107 | Electric door strike An Electric Door Strike is disclosed wherein a notch is provided in a strike frame for receiving a latch or a dead bolt. A pivoting shutter is positioned adjacent the notch and is pivotable between an open position to admit the dead bolt when the latter i... | 04/12/1977 |
| 4015869 | Catch mechanism A catch mechanism for installation in a door frame to cooperate with a door lock on a fire door. The mechanism includes a catch member pivotable between an operative position in which to serve as a door catch and an inoperative position to enable release ... | 04/05/1977 |
| 4012063 | Interlock latch assembly for centrifugals An apparatus having a rotatable member is provided with a locking bolt slidably mounted on an access cover pivotally mounted on a housing supporting the rotatable member. The locking bolt is axially displaceable toward a latching mechanism mounted on the ... | 03/15/1977 |
