Leslie A Win

US Patent:

47301902, Mar 8, 1988

Filed:

Oct 29, 1986

Appl. No.:

6/924390

Inventors:

Leslie A. Win - San Francisco CA
Wai Chi Wilkie Lam - Causeway Bay, HK

Assignee:

Winlam Company - San Francisco CA

International Classification:

G01S 1308

US Classification:

342118

Abstract:

A hand-held, portable, simple to use, low-cost yet accurate measurement device for measuring distances and calculating areas and volumes. The device comprises a microprocessor-controlled transmitter/receiver combination for transmitting measuring signals, and receiving reflections of those signals to provide distance or length measurements. The microprocessor operates to store sequential measurements and to calculate areas and volumes therefrom. The measurement procedure involves aiming the device and operating a simple sequence of buttons to obtain the measurements. Additional features of the device include a target and stand to reflect the measuring signals, a viewfinder, a level meter, and an indented rear portion with flush sides to place the device against a vertical surface for measuring, and a generally flat surface to place the device on a horizontal surface for measuring.