Abstract: A roller band sensor includes a housing having a cavity including a pair of spaced generally parallel side walls joined by proximal and distal end walls. A pair of bands of flexible spring material within the housing cavity are of generally elongate shape, with their adjacent abutting portions commonly secured to each other and their respective remote portions bearing against and secured to a respective side wall to divide each band into forward and rearward end loops.

Abstract: A pendulum type sensor includes a housing having a plurality of recesses, each receiving a sensor module. The sensor module includes a mass assembly, a spacer assembly and a contact assembly sandwiched together and secured to each other. Each assembly includes a support defining an enclosure, with the mass assembly enclosure receiving a sector shaped recess of the spacer assembly to locate the mass and deflectable wire of the mass assembly in an unactuated preload position. The contact assembly includes a plurality of contact fingers engaged by the mass upon movement to actuated position and an ultimate stop which prevents turning moments on the mass upon engagement of the contact fingers with the ultimate stop under the force of the mass.

Abstract: A pair of elongated movable contact members commonly secured to the bands between the adjacent portions thereof. The contact members project toward the proximal end wall of the sensor recess and are provided with flared proximal free end portions. The angularly related walls of a generally V shaped fixed contact project from the distal end wall of the sensor recess and are engaged by the movable contact members at actuated position. The end portions of the movable contact members laterally expand and the walls of the fixed contact laterally contract to absorb the energy of the moving mass of the sensor and eliminate contact bounce while maintaining electrical contact between the contact members to close an electrical control circuit. The distal end portions of the contact members may engage the distal end wall of the housing or an adjustable set screw to locate the roller bands and movable contact members in preload or unactuated position.