Charles B Yancey

US Patent:

50328662, Jul 16, 1991

Filed:

Mar 12, 1990

Appl. No.:

7/491535

Inventors:

John Shoden - New Hope MN
Gary Lakeberg - Mora MN
Charles Yancey - Minneapolis MN

Assignee:

Photo Control Corporation - Minneapolis MN

International Classification:

G03B 2772

US Classification:

355 38

Abstract:

An additive color light source for professional photographic printing is disclosed. The lamphouse has a closed loop light intensity feedback control system for regulating the light sources within the lamphouse.

US Patent:

40728250, Feb 7, 1978

Filed:

Jun 30, 1976

Appl. No.:

5/701430

Inventors:

Gerald M. McLay - St. Paul MN
Calvin D. Houdek - Lake Elmo MN
Charles B. Yancey - Los Angeles CA

Assignee:

Mi-Tronics, Inc. - St. Paul MN

International Classification:

H04M 342
H04Q 354

US Classification:

179 18B

Abstract:

A microprocessor control system for monitoring and controlling a plurality of different parameters or features of a large number of like-kind entities, each characterized by such parameters or features. The control system is particularly suitable for automatically controlling on an indiviudal room basis, parameters within hotels/motels such as: counting the number of outgoing calls, paging guests having messages and controlling room message waiting indicators, placing wake-up calls to guest rooms at predesired wake-up times, and tracking in real-time the housekeeping and occupancy status of each hotel/motel room. Incidentally to the room status feature, telephone sets within unoccupied rooms or within rooms being cleaned are automatically disabled from registering outgoing calls, but may be used for registering emergency calls. All control functions are performed by a microprocessor under hardwire program or firmware command. Each room has identified therewith in the control system a plurality of identifiable Feature circuits addressable by and responsive to commands by the microprocessor for interfacing with the respective telephone set circuits servicing that room.