First Inertia Switch Limited

Inertia Switch Limited

Peter R Jackman

Alan D Thomas

David W Crick

Peter D Allen

Paul P Stratton

Inertia switch and mounting therefor

An electrical switch has a movable contact 15 and a fixed contact 14. A member 26 can move the contact 15 to make or break the switch. A latch including a movable device controls the initial movement of member 26 but the member 26 then moves independently of the latch. The device can be moved to release the latch either manually (by 31) or by another mechanism. This other mechanism can be an electromagnet 41; it also can be an inertia body 51 releasable from a rest position in response to excessive acceleration.

Circuit breaker with multiple operators for actuator device

An electric switch 11 has contacts 12 and 13 which are initially closed by activating means 14. The invention provides urging means 22 to bias the switch against reopening of the contacts during at least an initial period which is useful if the activating means does not operate for long enough for the electric switch to assume its stable closed position. The urging means is responsive to current carried through the contacts. It is possible to provide a plurality of switches responsive to the same urging means, different switches being provided for different electrical circuits and possibly energised from different sources.

Electric switch

An inertia body moves from a rest position in response to an applied acceleration and in so doing operates an electrical switch remote from the rest position. The body moves on spaced rails of a track arranged in a plane, with an aperture between the rails so that the body can extend below the running surfaces of the rails. The plane may be inclined and/or the rails may be non-parallel so that the center of gravity of the body rises as it moves from the rest position.

Inertia sensor

Inertia switch impact sensor

Inertia switch device

Inerita switch device

An inertia switch having an inertia mass, in the form of a ball resting in a conical seat, which mass is responsive to applied acceleration or deceleration in any direction in a horizontal plane and is arranged to operate changeover electrical contacts connected in an electrical circuit for unlocking the electrically operated door locks of an automobile.

A seismonastic control apparatus has a ball mounted in a concavity for unobstructed movement into contact with a displaceable disc which actuates a two-mode control device on predetermined tilting or shock loading of the apparatus. To increase the kinetic energy of the ball and thus facilitate displacement of the disc, the seat is formed with a circular region at which the inclination of the seat to the central axis of the apparatus increases. As the ball crosses this region it is accelerated more rapidly because its path becomes more closely aligned with the resultant force acting on the ball.

Seismonastic switches with inertia responsive controller

A shock-responsive control apparatus has a seismic ball mounted in a seat formed in a cup-shaped member and surrounding the plunger of a switch. As the ball crosses a circular region, at which the inclination of the seat to the central axis of the apparatus increases, its path becomes more closely aligned with the resultant force acting on the apparatus and the ball is accelerated more rapidly out of obstructing engagement with the plunger. Sensitivity is controlled by moving the seat relative to the plunger by means of a screw-threaded mounted cover for the cup-shaped member.

Growing community of inventors

Basingstoke, United Kingdom

Peter R Jackman