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...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7460025 | Power supply device for low power switching sensors of a modular system The invention relates to a power supply device for energizing a modular measuring system. The measuring system comprises a modular display and adjustment unit and a modular low power sensor unit. Further, the power supply device is adapted to be disposed and connect... | 12/02/2008 |
| 7414538 | Detector assembly suited to smoke alarms A detector assembly (10) powered by mains electricity and an elongate backup battery (76) is disclosed. The assembly includes: a ceiling mountable base (10) having a body defining a downwardly opening socket (24); a detector module (20... | 08/19/2008 |
| 7193507 | Siren housing A siren housing has a dish-shaped base having a back wall adapted to be secured to as support structure. The base is configured and dimensioned to contain siren components. A post projects forwardly from the back wall. The post has a cylindrical sidewall terminating... | 03/20/2007 |
| 7123158 | Life safety alarm with a sealed battery power supply A life safety alarm, for example a smoke alarm, that is battery powered, has an extended life, and is less prone to user mistakes. The batteries are sealed inside the alarm portion so that the batteries cannot be accessed by the user. As a result, the batteries are ... | 10/17/2006 |
| 6762688 | Device with silencing circuitry A smoke detector monitors one or more internal conditions, such as battery output voltage in detectors that include batteries. Both audible and visible indicators are energized to indicate the presence of the monitored condition or conditions. A switch or a wireless... | 07/13/2004 |
| 6246324 | Mains interface module A mains interface module is disclosed for a screened enclosure containing electronic equipment. A mains interface module for a screened enclosure containing electronic equipment has a screened casing having a weather proof mains inlet connector, one or mo... | 06/12/2001 |
| 6160487 | Single lockout mechanism for a multiple battery compartment that is particularly suited for smoke and carbon monoxide detector apparatus A single battery lockout mechanism for a multiple battery compartment in an electrical unit, preferably a smoke detector or a carbon monoxide detector. The lockout mechanism prevents the battery compartment from being enclosed when fewer than all batterie... | 12/12/2000 |
| 6077107 | Terminal and door latch for battery operated devices A battery terminal and door latch for battery operated devices. The battery terminal and door latch assembly prevents the closure of a battery compartment door when one or more batteries are missing from the battery operated device. In the embodiment, the... | 06/20/2000 |
| 5820406 | Terminal and door latch for battery operated devices A battery terminal and door latch for battery operated devices. The battery terminal and door latch assembly prevents the closure of a battery compartment door when one or more batteries are missing from the battery operated device. In the embodiment, the... | 10/13/1998 |
| 5617079 | Apparatus for replacing a battery in a battery powered device An apparatus 10 for replacing a battery 12 in a battery powered detection device 14 is disclosed. The apparatus 10 includes a battery housing 18 attached to the detection device 14 for receiving a battery 12 therein and structure for inserting and removin... | 04/01/1997 |
| 5596314 | Enclosure for a gas detector system An enclosure for a gas detector including an easily removable and replaceable battery/sensor holder and a battery absence indicator. The enclosure includes a flat first panel adapted to be fastened into a ceiling, a second panel spaced from the first pane... | 01/21/1997 |
| 5281954 | Device for replacing battery in smoke alarm A device for replacing a battery in a battery powered apparatus such as a smoke alarm is provided which permits the battery to be replaced from a location remote from the battery connector of the apparatus. The device hereof includes a guide track in the ... | 01/25/1994 |
| 5121098 | Multi-function car door closure warning system A multi-function car door closure warning sensor includes a main module secured to a car door adjacent to an edge thereof, and an auxiliary module secured to the car body and adjacent with the main module, when the car door is in a closed position. A batt... | 06/09/1992 |
| 5103216 | Improperly inserted battery detector A deflectable battery retaining member in a battery powered unit blocks the improper insertion of a battery into the unit. Further, the same member in the absence of a battery inhibits engagement of the cover of the unit thereto providing a visual indicat... | 04/07/1992 |
| 5055830 | Battery sensing mechanism A smoke detector with a visual battery missing indicator and a removable cover includes first and second locking prongs molded in the detector and directed toward the cover. A battery is positionable between the first and second locking prongs deflecting ... | 10/08/1991 |
| 5053752 | Smoke detector and method using elongated flexible low battery condition indicator member The low battery level indicator is provided for a smoke detector. When the battery in the smoke detector becomes so weak that its voltage drops below a pre-determined value, an elongated, flexible signal member such as a tape or cord is released from the ... | 10/01/1991 |
| 4959640 | Apparatus for detect missing battery in smoke detector A battery-powered smoke detector in which the battery is inserted in a removable door that is then inserted into the detector to power the detector is rendered incapable of insertion into the smoke detector unless a battery is in place in the removable do... | 09/25/1990 |
| 4881063 | Battery removal indicator The present invention relates to a battery removal indicator for battery operated units such as smoke detectors or fire alarms. The battery removal indicator is formed by a spring loaded member which is retained in a retracted position when a battery is p... | 11/14/1989 |
| 4870395 | Battery powered smoke alarm safety lockout system Disclosed is a safety lockout system for battery powered smoke alarms. The body of the smoke alarm is removably securable to a mounting bracket that is attached to the wall or ceiling of a building. The safety lockout system prevents securing the body of ... | 09/26/1989 |
| 4228428 | Visible signal for alarm, such as a smoke detector The cover of a ceiling mounted smoke detector is hung at one side by a chain from the detector frame. At the other side the cover has a clip which engages the smoke detector battery. Thus if the battery is not in place the cover hangs down from the chain ... | 10/14/1980 |
