DOUGLAS A SOWDER
Pilots at High Dr, Spokane, WA

License number
Washington A1795784
Issued Date
Feb 2016
Expiration Date
Feb 2018
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
118 E High Dr, Spokane, WA 99203
LicenseFiles verified this license of May 6, 2017 at the Federal Aviation Administration.

Professional information

Douglas Sowder Photo 1

Biased Sheave Frame For Aerial Tram

US Patent:
4329926, May 18, 1982
Filed:
May 13, 1980
Appl. No.:
6/149443
Inventors:
Tony R. Sowder - Spokane WA
Douglas A. Sowder - Spokane WA
International Classification:
B61B 1206
US Classification:
104179
Abstract:
A compound frame to support a plurality of sheaves on a tower of an aerial tram with a predetermined bias between each sheave and a supported transiting cable. The sheaves are supported in paired opposed groups with each sheave of a group in substantial opposition so that the bias of each group of sheaves provides a safety factor to aid in maintaining a transiting cable therebetween. The manner of biasing paired sheave groups requires minimal forces for greater economy. An associated desheavement annunciating system is disclosed.

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