Aerospace and Defence Products supplies a range of toggle switches and rotary switches manufactured by Mason.
Among the earliest products from Mason, these switches were originally used to switch very high current circuits. Currently, these extremely rugged and dependable switches are specified for installations that require failure-free operation.
Typical applications for Mason toggle switches and rotary switches include aircraft trim control, safe/arm, weapon management, and manned space vehicle systems.
Key features of Mason toggle switches:
- Snap-feel, quick-make, quick-break, contact wipe and true positive action
- Spring mechanisms within the switch cause the operating force to be highest near the centre of travel, dropping off rapidly to produce a snap feel
- Snap feel, combined with the natural motion of the thumb or finger operating the switch results in a quick-make, quick-break action
- Electrical contact and operating knob attached to the actuator move as a single unit
- Position of the knob indicates the position of the switch so that when the knob is moved, the contact must also move
- Once the knob is moved away from a closed position, the circuit will be opened to create a true positive action
- Suitable for high current switching as well as low current switching
- Variations of the switches using different contact materials are capable of switching low and very low currents
- Enclosed construction, double-make, double-break circuitry and stored energy action
- All contact surfaces and switching mechanisms are located inside the switch where they are protected from outside elements
- Enclosure also makes the switch explosion-proof
- Circuit is completed by a shorting member that bridges a separate input contact and output contact at each switch position
- Circuit versatility forces the current to make and break at two points simultaneously, dividing the load, heat and wear
- As rotation to the next position begins, a spring in the advance mechanism is compressed, storing energy that is released all at once as rotation continues
- Rapid advance produces a quick-break, quick-make virtually independent of the speed of the actuator