Robert W Schultz

US Patent:

D3725456, Aug 6, 1996

Filed:

Aug 2, 1995

Appl. No.:

D/042170

Inventors:

Robert E. Schultz - Hatfield PA

Assignee:

Englert/Rollformer, Inc. - Willow Grove PA

US Classification:

D25138

US Patent:

39872408, Oct 19, 1976

Filed:

Jun 26, 1974

Appl. No.:

5/483208

Inventors:

Robert T. Schultz - Glendora CA

Assignee:

Glentronics/Division of Sawyer Industries, Inc. - Glendora CA

International Classification:

H04M 710

US Classification:

178 6

Abstract:

A direct current power supply system for providing power, including standby, to coaxial cable amplifiers in community antenna television networks. Alternating current is rectified and used to power coaxial cable amplifiers spaced along the cable and to maintain a full charge on a storage battery which is continually connected to the input of the cable. In the event of failure of the commercial primary power source, the battery feeds power to the cable amplifiers. Provision may be made for selectively reversing the output of the power supply to insure that there will be no corrosion deposits caused by electrolysis. Finally, the invention also provides circuitry for protecting the storage battery from excessive discharge during power failures of long duration.

US Patent:

56644515, Sep 9, 1997

Filed:

Aug 2, 1995

Appl. No.:

8/510150

Inventors:

Robert E. Schultz - Hatfield PA

Assignee:

Englert/Rollformer, Inc. - Willow Grove PA

International Classification:

B21D 508

US Classification:

72181

Abstract:

A machine for forming a metal roof panel of indeterminate length from a uniform width supply strip of sheet metal having a pair of parallel straight longitudinal edges. The machine has a series of spaced forming stations each having upper and lower shaping rollers between which the sheet metal strip is passed so as to impart a desired shape to the sheet metal strip which is uniform the length of sheet metal strip after it exits the apparatus. A stamping station located in the path of the sheet metal strip before the series of spaced forming stations is effective to form linear impressions in the sheet metal strip. The linear impressions are transverse to the longitudinal edges of the sheet metal strip, with each such impression having its lateral extent limited such that the succeeding series of shaping rollers do not impinge thereon.