George Berkeley Andrews

US Patent:

44751060, Oct 2, 1984

Filed:

Aug 24, 1981

Appl. No.:

6/295627

Inventors:

George R. Andrews - Temple City CA

International Classification:

G01S 504

US Classification:

343435

Abstract:

A simple inexpensive, very effective high to ultra high frequency radio direction finder is disclosed utilizing two parallel antenna units with switching means for alternately connecting the antenna units to a conventional unmodified FM or NBFM receiver at an audio frequency rate. If the centroids of the antenna units are not on a line normal to the path of the monitored input signal, the amplitude of the audible tone output signal resulting from the difference in phase of the alternately received input signals at the time of switching will vary with the angle of deviation of the antennae from this normal position. The slight alternations of phase are demodulated as slight frequency changes and produce a tone in the FM receiver output having the audio frequency of the antenna switching device. When the line between the electrical centroid of the two antennae is rotated to lie normal to the path of the monitored signal as it passes a point midway between the two antennae, the receiver tone output is a null or minimal, whereas it increases in amplitude as the antenna units are rotated further from normal. The apparatus includes automatic circuitry for resolving the ambiguity of the monitored signal source fore or aft of the operator when the output is at null.

US Patent:

53780981, Jan 3, 1995

Filed:

Oct 5, 1993

Appl. No.:

8/132502

Inventors:

George A. Andrews - Anaheim Hills CA
John D. Pratt - Laguna Niguel CA
Soheil Eshraghi - Irvine CA

Assignee:

Textron Inc. - Providence RI

International Classification:

F16B 1304
F16B 1306

US Classification:

411 43

Abstract:

A blind fastener designed to secure workpieces having aligned holes therein is provided. The fastener comprises an elongated stem having a head at one end and a serrated tail at the other, and a tubular sleeve having a head through which tail of the stem extends and a tail which is engaged by the head of the stem. The stem further includes a shear ring for bulbing the sleeve tail and a lock ring groove for receiving a lock ring for locking the stem to the sleeve. The stem also has a shoulder which engages shoulder portion in the sleeve to cause the sleeve to expand radially outward so as to fill any clearance or gap between the sleeve and the workpieces. A reservoir located in the stem accepts excess shoulder material displaced during the hole filling process. In one embodiment, a preformed lock ring is positioned in the lock ring groove to lock the stem to the sleeve. In another embodiment, a lock ring is formed from material in the sleeve head.

US Patent:

52520145, Oct 12, 1993

Filed:

Dec 9, 1992

Appl. No.:

7/987659

Inventors:

George A. Andrews - Anaheim Hills CA

Assignee:

Textron Inc. - Providence RI

International Classification:

F16B 1304
F16B 1306
B23P 1102

US Classification:

411 43

Abstract:

A blind fastener designed to secure workpieces having aligned holes therein is provided. The fastener comprises an elongated stem having a head at one end and a serrated tail at the other, and a tubular sleeve having a head through which tail of the stem extends and a tail which is engaged by the head of the stem. The stem further includes a shear ring for bulbing the sleeve tail and a lock ring for locking the stem to the sleeve. The stem also has a neck which engages a reduced diameter shoulder portion in the sleeve. Interference between the neck and the shoulder causes the sleeve to expand radially outward so as to fill any clearance or gap between the sleeve and the workpieces. A reservoir located in the stem accepts excess shoulder material sheared off during the hole filling process, the excess material also serving to form a secondary lock.