Abstract: Aspects of the present invention provide machines, systems, and methods in which industrial control systems may be secured from compromise and/or disruption via authentication and firewall. In particular, an industrial controller may: randomly generate an exchange key and send the exchange key to a client device in response to a transaction request originating from the client device; combine the exchange key with a locally stored pass key to produce an authentication code; and compare a challenge key received from the client device to the authentication code to determine a match between the challenge key and the authentication code. A successful match between the challenge key and the authentication code may allow the client device to further access the industrial controller using a common industrial protocol (CIP), and a failed match between the challenge key and the authentication code may prevent the client device from further access to the industrial controller.

Abstract: Aspects of the present invention provide machines, systems, and methods in which industrial control systems may be secured from compromise and/or disruption via authentication and firewall. In particular, an industrial controller may: randomly generate an exchange key and send the exchange key to a client device in response to a transaction request originating from the client device; combine the exchange key with a locally stored pass key to produce an authentication code; and compare a challenge key received from the client device to the authentication code to determine a match between the challenge key and the authentication code. A successful match between the challenge key and the authentication code may allow the client device to further access the industrial controller using a common industrial protocol (CIP), and a failed match between the challenge key and the authentication code may prevent the client device from further access to the industrial controller.

Abstract: A system software solution for controlling an enterprise which defines and illustrates the electrical, pneumatic, hydraulic, logic, diagnostics, external behavior, controlled resources and safety elements of an enterprise control system. The elements of the control system are encapsulated in objects of an object-oriented framework within a control assembly. The control assembly is the fundamental building block for providing object-oriented control of the enterprise. A control assembly component is a deployable control subsystem that provides an interface using a common object model that is configurable. The enterprise control system is used to define user interfaces including sequence charts that are updated in a substantially realtime manner utilizing the control assemblies associated with the generated code for the enterprise control system.

Abstract: Alkylthioethylamine salts are prepared by reacting certain alkenes with mercaptoethylamine salts in a glycol or glycol ether solvent in the presence of a free radical initiator. The product mixtures obtained are useful as antimicrobials as is or after the addition of inert formulation additives.

Abstract: A brush is rigidly attached to one end of a housing having a handle at the other end and, between the ends, a cylindrical opening supporting a rotor whose center of mass is displaced laterally from the axis of rotation. As the rotor turns, it exerts an unbalanced centrifugal force on the housing, causing it to oscillate. The rotor is preferably a single metal roller gyrating or rotating about the axis of the cylindrical opening, and it may be rotated by a tangential stream of fluid, e.g., water at utility district pressure. The rotor body may be solid or a hollow member filled with a heavy liquid such as mercury, and it is so supported that during rotation its outer peripheral surface approaches but does not touch the borewall of the opening in which it operates.

Abstract: A tie clasp shaped generally like a safety pin and having a shirt link attached to its fixed back member. The novelty lies in so proportioning the clasp that it can be used to receive either the back pendant portion or both pendant portions of a four-in-hand necktie. When used only to receive the back pendant, the clasp is preferably made long enough to receive the usually relatively narrow rear pendant but not so long that it extends to either side of the usually rather broad front pendant, thus making the clasp invisible to an observer facing the wearer. Also when so used, the tie clasp has a forward member with a pointed free end, this member being movable between a closed position and an open position, and while open it is thrust into and then out of the rear fold of the front pendant without going completely through the thickness of the tie, thus securing both pendants while at the same time remaining invisible.

Abstract: The concentration of alkali metal hydroxide contaminants in solutions of alkali metal alkoxides in alcohols is reduced to below about 0.1 percent by adding an alkyl alkanoate ester. For example, a solution of sodium methoxide in methanol containing about 0.04 percent sodium hydroxide was obtained by adding a small amount of methyl acetate. The alkali metal alkanoate salt formed as a by-product does not deleteriously affect most uses of such solutions.