| 摘要 |
<p>This light bulb shaped device is comprised of a one hundred and ten volt buzzer wired to a threaded light bulb type metal base (1). The sound from this buzzer is amplified by an unbreakable plastic megaphone (2). The interior works of this device are protected from tampering by affixing a protective unbreakable plastic grill (3) at the large end of the megaphone. This entire device is intended to be screwed into a typical light bulb socket in order to emit an audio alarm signal. This occurs when the light bulb socket is energized.</p> |
