US 5,489,890 A · Portable alarm device for entryway motion monitoring

Abstract

A generally rectangular housing defines an interior cavity therein. A conventional battery powered alarm circuit is supported within the interior cavity. A supporting suction cup is securable to the housing to permit attachment of the housing to a convenient surface. The housing defines an elongated slot in proximity to the circuit battery and a pair of spring contacts are provided for completing the battery power circuit connection to the alarm circuitry. An insulating tab is receivable within the alarm housing through the slot and extends between one of the spring contacts and its associated battery terminal to interrupt the battery power to the alarm circuit. The insulative tab is coupled to a second suction cup by a flexible line. The alarm system is installed by positioning the alarm housing and the second suction cup on opposite sides of a movable door or window portion. The alarm is triggered as the second suction cup is moved drawing the insulative tab outwardly from the alarm housing and permitting the completion the battery power circuit to the alarm circuit.

Claims6

Dependent claims

For use in detecting motion of entryway apparatus, an alarm comprising:

a housing defining an external surface, an interior cavity and an aperture;
a first suction cup secured to said external surface of said housing and having a suction cone facing outwardly with respect to said housing;
an audible alarm circuit supported within said interior cavity;
a battery having first and second terminals forming part of said alarm circuit;
first and second spring connectors forming part of said alarm circuit and biased to be normally coupled to said first and second battery terminals respectively;
a tab having a first end extending partially into said interior cavity through said aperture so as to be positioned between said first spring connector and said first battery terminal thereby precluding electrical connection therebetween and a second end external to said housing;
a second suction cup;
and
a flexible line coupled between said second end of said tab and said second suction cup.

6 more elements

Dependencies are inferred from the claim text.

Portable alarm device for entryway motion monitoring

Life of this patent

Portable alarm device for entryway motion monitoring

Life of this patent

Abstract

Claims6