American Cyanamid Company

Other

Mark L Stein

Charles L Putnam

Patrick R Holmes

Robert Bruce Lyon

Thomas E Egbert

Cyril L Johnson

Analog and digital power control switching circuits and power strips for use with various electronic devices and electrically operated appliances all enable a first device to control the powering or start-up of other devices. A smart power strip variation enables a user to energize all computer peripherals simply by turning the computer on or off. All embodiments comprise a sensing subcircuit that monitors AC current passed through the device or appliance plugged into a sensing outlet, which, in turn, generates a conditioned DC monitoring signal. A related control subcircuit driven by the monitoring signal powers suitable relays or transistors for activating downstream devices or appliances. All sensing subcircuits comprise a transformer primary, a capacitor, and at least one pair of anti-parallel diodes all connected in parallel. The stepped-up transformer output is rectified and filtered, yielding a DC monitoring signal delivered to the control subcircuit. Each control subcircuit has a solid state switch responsive to the monitoring signal that controls relays or transistors that power the controlled appliance or device. Preferred digital control subcircuits comprise a microcontroller that executes suitable software for dynamically determining the precise points at which the relays controlling downstream components should be activated or deactivated. In one digital variation, the user inputs suitable set points with manual switches that program the microcontroller. In a preferred digital version, a self-learning program is implemented by the control subcircuit to automatically determine future operating parameters.

Power control circuits with enhanced nonlinear current sensing

A single-strike die mechanism includes a rotatable cam drive ring driven to impart through a cam mechanism linear motion to at least three crimping dies. The crimping dies are symmetrically arranged within a die guide and simultaneously actuated to move in a radial direction toward a centerline of a surgical needle. A surgical suture is axially inserted within a hollow barrel end of the needle, and the barrel end is crimped by the crimping dies to secure the suture therein. A method for operating the single-strike die mechanizes the procedure for securing the suture within the barrel end of the needle.

Medical suturing device, a single-strike die mechanism, and a method of

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Bethel, CT, United States of America

Mark L Stein