Abstract: A lacrimal cannula for insertion, dilation, probing, and irrigation of the lacrimal drainage system, starting with a small diameter distal end to facilitate entry into the lacrimal puncta, tapering in size to a larger diameter serving to seal the puncta as fluid is forced through the device.

Abstract: A coil mounting arrangement includes a coil wound on a bobbin and in turn disposed about a core which is mounted to a frame. The frame includes a base portion and a leg portion which extends upwardly therefrom at a right angle. A support collar extends upwardly from the upper surface of the frame base portion and encircles a mounting opening which extends through the frame base portion. The core is inserted downwardly into press-fitted engagement with the frame within the support collar and mounting opening. Insertion continues until the height of the top of the core correlates directly with a position on the frame leg portion, such as the pivot axis of an armature. The underside of the frame base portion remains smooth.

Abstract: A bistable electrical contactor employs a one-piece permanent magnet plunger operating in conjunction with an aligned pole piece and a pair of oppositely-wound coils to afford pulse-operated bistable operation of the associated contacts. The coils are wound in opposition to provide respective opposite electromagnetic fields, one "aiding" and one "opposing" the inherent magnetic flux of the plunger. The plunger may be spring-biased toward one of its two bistable positions, typically the one in which the plunger is most remote from the pole piece. When an appropriate coil is briefly energized, the respective "aiding" or "opposing" force is respectively added to or subtracted from the inherent magnetic force of the plunger to cause the appropriate change of state. The pole piece is structured and positioned to facilitate interaction with the plunger. An adjustable stop arrangement minimizes bounce of resiliently-mounted contacts.

Abstract: An electrical equipment controller is provided with a delayed turn-off capability. A thermostat is in series with a control relay. The thermostat is further in parallel with the series combination of a relay latch contact and a first positive temperature coefficient (PTC) device. A second PTC device is connected in parallel with the control relay. The arrangement of first and second PTC devices provides a predeterminable drop-out relay including compensation for ambient temperature changes.

Abstract: A solenoid contactor arrangement facilitates soft contact between the movable and stationary contacts and provides for overtravel of an armature in a manner which ensures that good and consistent electrical contact is maintained between the movable and the stationary contacts. The movable contacts are carried on an axially reciprocable armature assembly and are afforded limited axial displacement relative thereto. The movable contacts are biased by a coil spring to a first position on the armature assembly in preparation for engagement with the stationary contacts. When that engagement occurs, the movable contacts stop, the spring yields, and further displacement of the armature assembly occurs until a stop on it firmly contacts and is stopped by a corresponding stop on the movable contacts. The spring is formed and positioned such that it does not dimensionally interfere with the firm contact between the movable contacts and the armature assembly.

Abstract: A push to start dual relay having master electrical contacts which are closed when a push button is depressed. The master contacts control the power supplied to a control circuit which, in turn, controls the power supplied to two relays. When the push button is released and either one or both relays are energized, the master contacts remain in the closed position. When the push button is released and both relays are deenergized, however, the master contacts are allowed to open.