White Consolidated Industries, Inc.

Gdb Enterprises, Inc.

William L Blowers

Robert Milich

Kenneth F Stofle

Richard Shields

Thomas F Denove

Walter Kovacs

In a handheld incident light meter instrument, a custom LCD panel provides both a digital readout and a bar graph array which simulates an analog meter but uses no moving mechanical parts and which may be operated in a choice of modes: bar, floating zone or dedicated. Unusual accuracy and stability over a wide dynamic range, from 0.1 to over 50,000 footcandles, are achieved in a novel analog photo-amplifier portion having a linear autoranging preamplifier, an averaging integrator and a temperature-compensated log converter, driving an IC analog-to-digital converter connected to a microprocessor programmed to operate in a choice of modes to operate the LCD via a driver to display light readings according to commands entered via a set of ergonomic user controls. Battery condition is displayed continuously. The digital readout may be backlit for low ambient light level. Two versions each provide special operating modes in addition to a regular illuminance mode in which incident light readings are displayed in a choice of footcandles or lux with up to 5 sequential readings storable on display. A first version, the 'Cinemeter II', directed particularly to cinematography, accepts user-entered data such as film speed, shutter speed, shutter angle and lens filters, and displays movie camera f-stop settings automatically calculated from the light reading. A second version, the 'Lighting Director', for evaluating illuminance in various environments including movie-making, stage lighting, general photography and architectural illumination, etc., can display light readings as +/- deviation from a preset target value, with optional audible indication.

LCD bargraph motion picture light meter

A combined air gap and dispensing device is adapted to be mounted on a sink, and comprises an internal air gap between inlet and outlet waste tubes. A liquid carrying pipe, such as a hot water pipe, also extends through the device to a faucet for being dispensed. A pair of fiber optic cables have exposed ends at the upper end of the device, and are coupled to a control system for valving liquid to the dispensing pipe. The control circuit may include a light source directed to one of the fiber optic cables, a photo sensor connected to the fiber optic cable to receive reflected light, and amplifying and demodulating circuitry, as well as a logic circuit responsive to determined conditions at the upper ends of the fiber optic cables for controlling the flow of liquid to the dispensing pipe. A pneumatic tube and pneumatic actuator may be provided instead of the optic cables and associated optic devices.

Pneumatic actuated switch for hot water dispenser

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Newhall, CA, United States of America

William L Blowers