Abstract: A closed sterilizer chamber in which a medium may be contained to be sterilized at a predetermined temperature below 212.degree. F., and has a vacuum system for continuously drawing a vacuum. When a particular vacuum is achieved, a steam source injects steam into the chamber under the control of a pressure sensor, and a temperature sensor. After a predetermined temperature and pressure are reached, the injection of steam in the chamber is controlled by a second temperature sensor.

Abstract: An electromagnetic indicator has a stator carrying a stationary reversibly magnetizable core, and a rotor including a display disk and rotary cylindrical magnet. The magnet is permanently magnetized with two poles each angularly spaced apart less than 180.degree. at one side of a diameter of the magnet which also passes through the radially located core. Stop elements carried by the stator and core are engaged in each stopping position of the rotor when one of the magnet poles is attracted to, but held spaced from the magnetized core. The poles can be located to effect a turning range of the rotor from 120.degree. to 250.degree..

Abstract: Sealing means for maintaining a seal between a closed door of a sterilizer and a wall framing an opening into a sterilizer chamber, comprising an endless ring having elastic walls with an internal partition dividing the ring into two independently inflatable, expansible channels. A tube secured to a wall of the ring opens into each of the channels respectively, for independently inflating the channels. Elastic studs with enlarged heads are secured to one side of the ring for detachably engaging in holes in the open wall of the chamber. A pneumatic circuit including a source of compressed air may be connected to the two tubes and provided with a two-way valve for inflating either one of the two channels.

Abstract: A magnetic indicator assembly has a casing containing a stator comprising a reversibly magnetizable core carrying a wire coil. A rotor is angularly turnable around said casing through an angle of approximately 120.degree. to expose either one of two flags carried by the rotor on angularly disposed walls of a nonmagnetic member. The rotor carries a block supporting two coplanar, aligned bar magnets oppositely polarized. Either one of the magnets is attracted to the core depending on the polarity of the magnetic circuit as determined by the energization of the wire coil.

Abstract: Apparatus and a process for quietly injecting live, high pressure steam into water in a sterilizer chamber, wherein a minute quantity of air at higher pressure than the steam is quietly mixed with the steam prior to passing the stream of air mixed with steam into water in the chamber. The water can be drawn from the chamber by a recirculating pipe into a venturi ejector into which the stream of air mixed with steam is passed. The water quietly mixes with the stream of air and steam and the combined stream of air, steam and water is quietly recirculated back into the chamber.

Abstract: A surgical restrainer for an animal has a striplike structure including a central flat bottomed band with inverted V-shaped legs at opposite ends defining loops to receive forearms of an anesthetized animal resting in supine position on said band and cradled between said legs, so that the animal cannot roll over during surgery and post-operatively.

Abstract: Pressure actuated monitoring means for a vehicle having wheels carrying tubeless tires, includes pressure sensors mountable on each wheel. Each sensor has a housing receiving direct pressure of air from the interior of a tire. A flexible member in the housing moves in response to air pressure in the tire when the pressure falls below a critical predetermined magnitude. A switch on the housing has contacts which open and close in response to movements of the flexible member. The sensor is adjustable to respond to pressure of any predetermined magnitude. The monitoring means includes axles connected to the driving wheels. The axles carry slip rings continuously wiped by wiper arms carried by stationary axle housings. Alarm lamps are connected in circuit with the wiper arms. The monitoring means may also include spindles carrying freely rotatable wheels. Fixed spaced contact rings on the spindles are wiped by continuously rotating wiper arms carried by the wheels on the spindles.