Electromagnetic radiated signal receiver

Description

FIG. 1 is a top, front and left side perspective view of an electromagnetic radiated signal receiver showing our new design;

FIG. 2 is a left side elevational view;

FIG. 3 is a right side elevational view;

FIG. 4 is a front elevational view;

FIG. 5 is a rear elevational view;

FIG. 6 is a top plan view;

FIG. 7 is a bottom plan view; and,

FIG. 8 is a top plan view of a second embodiment showing our new design of FIG. 6 thereof.

Referenced Cited
U.S. Patent Documents
D197414 January 1964 Erath
D217931 June 1970 Humphreys, Jr.
D261871 November 17, 1981 Akers, Jr.
3975735 August 17, 1976 McCullough et al.
3988663 October 26, 1976 Slough et al.
4044299 August 23, 1977 Weber
4063161 December 13, 1977 Pardis
4085360 April 18, 1978 Howell
4295095 October 13, 1981 Thomas et al.
4323847 April 6, 1982 Karbowski
4387340 June 7, 1983 Peterman
4452075 June 5, 1984 Bockhorst et al.
4520317 May 28, 1985 Peterman
4806869 February 21, 1989 Chau et al.
4837489 June 6, 1989 McFee
Foreign Patent Documents
0246886 November 1987 EPX
63-26526 June 1988 JPX
Other references
  • Goldak/UDESEC Model TR-5A Pipe Locator advertisement Pipeline and Utilities Construction, Oct. 1988. "The Trench vs. The Tunnel", A Flowmole brochure. "Radiodetection: Sheath Fault and Cable Location With the RD400 Range". "Radiodetection: RD400 Buried Pipe and Cable Locator". "Radiodetection: RD320 Cover Locator". "Radiodetection: RD300 Drain Locator". "Radiodetection: RD400 Precision Buried Pipe and Cable Precision Locator". "The Hole Boring Story", a Ditch Witch brochure. "MAC-51B Magnetic & Cable Locator". "Dynatel 4420 Power Cable/Fault Locator Operators Manual". "Dynatel 4420 Power Cable/Fault Locator". "Dynatel 500A/P Cable Locator and Dynatel 573A/P Earth Return Fault and Cable Locator Operator's Manual". "Teltrak 2001", a Metrotech Locator. "Dynatel Locators-573DX and 573D Sheath Fault/Cable Locators-500D Cable Locator". "Cable and Fault Locators Get a Little Smarter", Outside Plant, Aug. 1990. "Metrotech Model 810". "Operation Manual Micro-Computerized Pipe Locator MPL-H5-E-Microprocessor-Controlled Active Cable & Pipe Locator". "3Dd-301A Pipe-Cable Locator/Tracer". "The Lynch PL55 Pipeline and Cable Locator". "The Lynch PL-801GXII Pipeline and Cable Locator". "Micro-Computerized Pipe Locator MPL-H5-E". "Pipe and Cable Location Theory", a Radiodetection Data Sheet.
Patent History
Patent number: D328439
Type: Grant
Filed: Apr 23, 1990
Date of Patent: Aug 4, 1992
Assignee: The Charles Machine Works, Inc. (Perry, OK)
Inventors: Tommy K. Ormand (Perry, OK), Mitchell H. Babkes (Wichita, KS), Benjamin C. Baugh (Wichita, KS), John W. Bieberdorf (Stillwater, OK)
Primary Examiner: Donald P. Walsh
Assistant Examiner: Antoine O. Davis
Law Firm: Banner, Birch, McKie & Beckett
Application Number: 7/513,588