Abstract: A portable mass spectrometer is described having one or more electrostatic focusing sectors and a magnetic focusing sector, all of which are positioned inside a vacuum chamber, and all of which may be adjusted via adjustment means accessible from outside the vacuum chamber. Mounting of the magnetic sector entirely within the vacuum chamber permits smaller magnets to be used, thus permitting reductions in both weight and bulk.

Abstract: A slush ice maker includes a fluid chiller having water circulation tubes in which water flowing therethrough is deeply cooled to about 32.degree. F., a water conduit system coupled with the chiller and including a high pressure pump for pumping water through the tubes at a pressure of about 2 to 4 atmospheres and at a velocity in excess of 9 ft. per second to effect the formation of ice crystals in the water so as to define the slush ice. The ice and water mixture is discharged into an ice accumulation tank maintained at atmospheric pressure so that the formation of ice crystals are enhanced when the pressure of the slush ice is reduced to atmospheric at the tank.

Abstract: Articles of food to be frozen are delivered to an article conditioning conveyor and are maintained in a fluidized state by refrigerated air flowing upwardly therethrough. The conveyor is driven forwardly but is interrupted by at least one downward stepping movement, causing a thinning of the product bed and a rapid increase in air velocity to thus cool and separate the food articles preventing them from freezing to one another. The food articles are thereafter subjected to deep bed mass fluidization by flowing freezing air therethrough in a fluidized state.

Abstract: Articles of food to be frozen are delivered to an article conditioning conveyor and are maintained in a fluidized state by refrigerated air flowing upwardly therethrough. The conveyor is driven forwardly but is interrupted by at least one downward stepping movement, causing a thinning of the product bed and a rapid increase in air velocity to thus cool and separate the food articles preventing them from freezing to one another. The food articles are thereafter subjected to deep bed mass fluidization by flowing freezing air therethrough in a fluidized state.

Abstract: A powder dispensing brush for use in dispensing medicated powders or flea control powder onto the body of a pet comprises a hollow elongate handle provided with an end opening closed by a snap-lock closure through which the powder is inserted into the handle interior. The handle itself is formed to provide a grasping surface over one longitudinal segment thereof and an applicator segment on the remainder of its structure. Formed on one lateral surface of the applicator segment are a plurality of conical projections each provided with a central vertical port communicating with the interior cavity of the handle. It is through these ports that powder deposited in the handle is dispensed onto the skin of the animal. In order to control the flow rate of the powder there is further included inside the handle a sliding plate provided with a plurality of openings disposed to align, along one point of the sliding stroke with the ports in the projection.