Abstract: In a wireless sound monitoring system, ambient sounds are monitored by a microphone and transmitted over a phase or frequency modulated transmitter to a receiver. A sound actuated switch responsive to ambient sounds louder than a predetermined level turns the transmitter on and causes a hidden tone to be generated. A delay circuit caused the hidden tone to be terminated before the transmitter is turned off when the sound level decreases. In the receiver, a mute circuit responds to the hidden tone to control the output of a loudspeaker, and thus, the hidden tone prevents a squelch tail from being heard. The monitoring unit also includes a pulse generator to cause the hidden tones to be generated at regular intervals, but with short pulse widths.

Abstract: A device for producing bubbles is disclosed including a housing having an entry port and an exit port, where a chamber is defined therein in flow communication with the entry and exit ports. A drive shaft is located within the housing chamber with a turbine wheel mounted to the drive shaft in a rotatable manner. The turbine wheel includes a plurality of pin members extending therefrom and a crank arm is provided for rotating the turbine wheel. Accordingly, water and bubble solution entering the housing chamber through the entry port is mixed with air to produce bubbles in the housing chamber which are encouraged to flow through the exit port. The entry port is oriented substantially perpendicular to the rotation of the turbine wheel and the exit port is oriented substantially in line with the rotation of the turbine wheel.

Abstract: A security gate for positioning within an area way such as a doorway. The gate includes a support structure defined by a frame and a flexible panel supported by the frame. The frame includes horizontal members and vertical members detachable engaged with the horizontal members. One end of the horizontal members includes a lock assembly including a pivoting linkage defining a parallelogram structure for facilitating firm engagement of the horizontal members with opposing sides of the doorway.

Abstract: An infant seat having a seating surface positionable between upright and reclined orientations, the seating surface being supported by arms which are connected to torsion springs in a base, the torsion springs providing a bouncing motion to the seating surface in both the upright and reclined orientations. The base includes a rear support member which pivots between a support position, in which the member is substantially coplanar with the base, and a collapsed or folded position, in which the support member is pivoted adjacent to the seating surface. In a preferred embodiment, the connection between the seating surface and support arms includes a pivot plate pivotally connected to the seating surface and support arms and includes a slot engaged by a shoulder rivet attached to the support arms which defines limits of pivotable movement of the seating surface.

Abstract: An infant seat having a seating surface positionable between upright and reclined orientations, the seating surface being supported by arms which are connected to torsion springs in a base, the torsion springs providing a bouncing motion to the seating surface in both the upright and reclined orientations. The base includes a rear support member which pivots between a support position, in which the member is substantially coplanar with the base, and a collapsed or folded position, in which the support member is pivoted adjacent to the seating surface. In a preferred embodiment, the connection between the seating surface and support arms includes a pivot plate pivotally connected to the seating surface and support arms and includes a slot engaged by a shoulder rivet attached to the support arms which defines limits of pivotal movement of the seating surface.