Burglar alarm

An alarm system by which unauthorized entrance through a closure means into an enclosure causes a first telephone to dial a second telephone comprising:

• a first switch means (34) for connection to a closure means so that movement of the closure means activates said first switch means;
• a motor-driven switch actuator (10), a first telephone (6), a second telephone (44), means forming an automatic dialing apparatus by which a predetermined telephone number can be dialed;
• circuit means connecting said automatic dialing apparatus to said first telephone;
• means, including a call switch on said automatic dialing apparatus, by which said first telephone will dial said second telephone when said call switch is activated;
• circuit means connected to said first switch means for causing said motor of said motor-driven switch actuator to be energized upon movement of the closure means to which said first switch is connected;
• means by which said motor-driven switch actuator is positioned respective to said automatic dialing apparatus so that said call switch is actuated when said motor-driven switch actuator is energized;
• said motor-driven switch actuator being a motor-driven reduction gear assembly having an output shaft, a cam affixed to said shaft, said cam being arranged respective to said motor-driven reduction gear assembly, shaft and call switch, so that rotation of said shaft causes said cam to engage and actuate said call switch.