Doorknob assembly with intrusion alarm
First Claim
1. A doorknob system with an intrusion alarm comprising:
- a knob and locking assembly including exterior and interior knobs for being positioned on opposite sides of a door and a shaft assembly for extending between said exterior and interior knobs for being rotated by said exterior and interior knobs and including a door locking mechanism for locking said knobs against rotation;
a door latch assembly for being mounted in the door intermediate said exterior and interior knobs while engaging said shaft assembly, said door latch assembly including a latch housing for being fixedly mounted in said door and a retractable latch for being linked to said shaft assembly and for being movable in said latch housing in response to rotation of said shaft assembly;
an interior cover plate having a shaft opening therein for being mounted on a door surface between said interior doorknob and said door surface, with said shaft assembly passing through said shaft opening;
an electrical alarm mounted in said cover plate between an inner surface of said cover plate and said door for emitting a signal in response to manipulation of one of said exterior and interior knobs, said electrical alarm including an electrical signal emitter and an electrical signal-actuation switch which is switched in response to said manipulation of said exterior and interior knobs, thereby causing said electrical signal emitter to emit a signal;
wherein is further included a separate battery pack including a battery-pack mounting means for mounting said battery pack on an exterior surface of said cover plate, said cover plate and said battery pack respectively including interengaging cover-plate terminals and battery-pack terminals for automatically making electrical contact with one another upon said battery pack being mounted on the exterior surface of said cover plate for transmitting electrical energy from batteries in said battery pack to said electrical alarm.
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Accused Products
Abstract
A doorknob system (10) with an intrusion alarm includes a separate U-shaped battery pack (24) having mounting apparatus for mounting the battery pack on an exterior surface of an interior cover plate (22), with interengaging cover-plate and battery pack terminals (62a,b; 6a,b) for transmitting electrical energy from batteries (54) in the battery pack to an electrical alarm (26). A filler protrusion (44) on the interior cover plate spans legs (24a,b) of the U-shaped battery pack. A signal emitter (68) is mounted in the cover plate and first and second signal-actuation switches (70, 72) are mounted on a door latch assembly (20). Free wires (98a,b) are provided between the signal emitter and the door latch assembly. The second signal-actuation switch (72) is operated by a lock shaft (28) and a first signal-actuation switch is operated by rotation of a doorknob shaft (78).
23 Citations
21 Claims
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1. A doorknob system with an intrusion alarm comprising:
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a knob and locking assembly including exterior and interior knobs for being positioned on opposite sides of a door and a shaft assembly for extending between said exterior and interior knobs for being rotated by said exterior and interior knobs and including a door locking mechanism for locking said knobs against rotation; a door latch assembly for being mounted in the door intermediate said exterior and interior knobs while engaging said shaft assembly, said door latch assembly including a latch housing for being fixedly mounted in said door and a retractable latch for being linked to said shaft assembly and for being movable in said latch housing in response to rotation of said shaft assembly; an interior cover plate having a shaft opening therein for being mounted on a door surface between said interior doorknob and said door surface, with said shaft assembly passing through said shaft opening; an electrical alarm mounted in said cover plate between an inner surface of said cover plate and said door for emitting a signal in response to manipulation of one of said exterior and interior knobs, said electrical alarm including an electrical signal emitter and an electrical signal-actuation switch which is switched in response to said manipulation of said exterior and interior knobs, thereby causing said electrical signal emitter to emit a signal; wherein is further included a separate battery pack including a battery-pack mounting means for mounting said battery pack on an exterior surface of said cover plate, said cover plate and said battery pack respectively including interengaging cover-plate terminals and battery-pack terminals for automatically making electrical contact with one another upon said battery pack being mounted on the exterior surface of said cover plate for transmitting electrical energy from batteries in said battery pack to said electrical alarm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. The doorknob system with an intrusion alarm comprising:
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a knob and locking assembly including exterior and interior knobs for being positioned on opposite sides of a door and a shaft assembly for extending between said exterior and interior knobs for being rotated by said exterior and interior knobs and including a door locking mechanism for locking said knobs against rotation; a door latch assembly for being mounted in the door intermediate said exterior and interior knobs while engaging said shaft assembly, said door latch assembly including a latch housing for being fixedly mounted in said door and a retractable latch for being linked to said shaft assembly and for being movable in said latch housing in response to rotation of an element of said shaft assembly; an electrical alarm for emitting a signal in response to manipulation of one of said exterior and interior knobs, said electrical alarm including an electrical signal emitter and an electrical signal-actuation switch which is switched in response to said manipulation of said exterior and interior doorknobs, thereby causing said electrical signal emitter to emit a signal; wherein said electrical signal-actuation switch is mounted on said door latch assembly for contacting said shaft assembly to cause said switching of said signal-actuation switch in response to rotation of said shaft assembly. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. The doorknob system with an intrusion alarm comprising:
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a knob and locking assembly including exterior and interior knobs for being positioned on opposite sides of a door and a shaft assembly for extending between said exterior and interior knobs for being rotated by said exterior and interior knobs and including a door locking mechanism for locking said knobs against rotation; a door latch assembly for being mounted in a door intermediate said exterior and interior knobs while engaging said shaft assembly, said door latch assembly including a latch housing for being fixedly mounted in said door and a retractable latch for being linked to said shaft assembly and for being movable in said latch housing in response to rotation of an element of said shaft assembly; an interior cover plate having a shaft opening therein for being mounted on a door surface between said interior doorknob and said door surface, with said shaft assembly passing through said shaft opening; an electrical alarm for emitting a signal in response to manipulation of one of said exterior and interior knobs, said electrical alarm including an electrical signal emitter and an electrical signal-actuation switch which is switched in response to said manipulation of said exterior and interior doorknobs, thereby causing said electrical signal emitter to emit a signal; wherein is further included a battery pack including a battery-pack mounting means for mounting said battery pack on an exterior surface of said cover plate; wherein said battery pack has a U-shape for extending about said shaft assembly and engaging said cover plate on opposite sides shaft assembly. - View Dependent Claims (21)
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Specification