Abstract: A remote speaker microphone includes a housing having a bezel defining an outer surface. The remote speaker microphone further includes a toggle switch lever that rocks back and forth relative to the bezel. The remote speaker microphone further includes a bezel opening through which the toggle switch lever extends at the outer surface. The bezel and the toggle switch lever define a predetermined gap within the bezel opening and within which the toggle switch lever rocks. The bezel, the bezel opening, and the toggle switch lever together form an ice crushing region in response to rocking the toggle switch lever.

Abstract: An electrical switch has a fixed contact and a moving contact arranged for movement between an ON position in contact with the fixed contact and an OFF position out of contact with the fixed contact, and an operating member for operating the moving contact. A spring co-acts between the operating member and the moving contact and resiliently biases the moving contact towards each of the ON and OFF positions through an over-centre action of the spring. An end piece is fitted at each end of the spring, which has a formation, for example, a groove, for pure rotary engagement with a part, for example, a pin, movable with the operating member or moving contact for imparting resilient action upon the operating member or the moving contact.

Abstract: Devices and methods for separating sample constituents are provided. The subject devices are characterized by having a fluid flow path with at least one electrophoretic separation element positioned at a region thereof. The separation element includes an element for applying an electric field across the fluid flow path and a trapping element for trapping sample constituents that migrate out of the flow path when an electric field is applied across the fluid flow path. In using the subject devices, sample is moved past the separation element and an electric field is applied across the flow path such that constituents of the sample migrate into the trapping element. The subject devices and methods find use in a variety of applications, including protein separation applications.

Abstract: The invention relates to a mechanical switching contact for bipolar commutation comprising an insulating support having fixed contacts disposed therein. Said contacts are switchable by means of a contact carrier which possesses a pivoting arm on the free end and thereof with a respective conducting contact element. The whole mechanical switching contact is configured as a modular unit which can be assembled in an optional manner.

Abstract: A double pole single throw electric switch has normally closed contacts of one pole connected in a dynamic braking circuit with a motor load and normally open contacts connecting the motor to a source of power. A partial movable contact conductively connected to movable contacts of the normally open contacts is disposed in normally open position relative to one contact of the normally closed contacts to provide a parallel path through the switch for making and breaking the circuit to the power source.

Abstract: A push button switch, particularly a master switch, has housing-affixed contacts (4, 7) and at least one contact bridge (8, 9) movable by a spring plunger (10). A spring-switching mechanism (24, 25, 26) is operatively coupled between the spring plunger and a manually-movable sliding switch, or switch actuator, (22). A guiding, or sliding, locking linkage apparatus for the sliding switch (22), which includes two locking parts, a first of which is a track (27) and a second of which is a follower lever (28) for engaging the track. Upon alternate depressions of the sliding switch, the sliding switch alternately moves between "on" and "off" positions. In order to prevent damage to the locking apparatus upon a pulling of the sliding switch in a direction opposite to a direction of depression of the sliding switch, the first and second locking parts release from the housing to follow movement of the sliding switch.

Abstract: A full double wall tank, primarily for underground fluid storage, which is simpler and more economical to construct than conventional full double wall tanks. An inner tank shell, preferably of steel, provides primary fluid containment and is the principal structural basis of the tank. An intermediate barrier layer is applied over the inner shell to define secondary containment space, and provides a base for application of a resin outer secondary containment tank shell which is preferably fiber-reinforced. Monitor sensor means is provided having access to the secondary containment space, preferably proximate the bottom of the tank. The barrier layer is preferably such as to provide a minimum of fluid-receiving secondary containment space for rapid and highly sensitive monitoring, and to provide cathodic protection for a steel inner tank shell.