Richard D Chapman

US Patent:

47377747, Apr 12, 1988

Filed:

Aug 15, 1986

Appl. No.:

6/897127

Inventors:

Richard C. Chapman - Brooklyn Park MN
Michael E. Hamerly - Brooklyn Park MN

Assignee:

CompuCap, Inc. - Brooklyn Park MN

International Classification:

G01P 1508
G08B 2300
A01K 1500

US Classification:

340573

Abstract:

An activity sensor which provides an indication of motion caused by changes in acceleration of a person or animal, and wherein such changes of motion are sensed by a movable magnet which is biased to a rest position along a guide. The axis of the path of movement of the movable magnet is substantially parallel to the direction of accelerations of interest. A Hall effect sensor is provided for sensing motions of the movable magnet from its rest position, and it provides an output proportional to these movements.

US Patent:

46522611, Mar 24, 1987

Filed:

Jun 22, 1984

Appl. No.:

6/623389

Inventors:

L. David Mech - Minneapolis MN
Richard C. Chapman - Brooklyn Park MN
William W. Cochran - Champagne IL

Assignee:

Regents of the University of Minnesota - Minneapolis MN

International Classification:

A61D 700

US Classification:

604130

Abstract:

A drug-injection animal collar includes electrically operated drug injection darts or syringes that are controlled by control circuitry mounted on the collar which may be preset and self-timed and actuated, or may be remotely actuated by radio signals. The collar is placed on the neck of an animal and upon receipt of a signal, a suitable drug is injected into the neck muscles of the animal. The collar and its method of operation allow regular recapture of individual animals at will for research purposes. The collar and darts may be reconditioned and then reused. The power for operation is also contained in the control package carried by the collar.

US Patent:

47620889, Aug 9, 1988

Filed:

Aug 3, 1987

Appl. No.:

7/080771

Inventors:

Richard C. Chapman - Brooklyn Park MN
Michael E. Hamerly - Brooklyn Park MN

Assignee:

CompuCap, Inc. - Brooklyn Park MN

International Classification:

A01K 106

US Classification:

119106

Abstract:

A pyrotechnic release mechanism is actuated by an electrical signal from a remote telemetry actuator such as a radio transmitter to cause two normally connected parts to separate. When used as shown with an animal collar mounted data acquisition system, the two parts can be separated to release the collar. If desired, a separate data storage device can be released to permit stored data to be recovered. The device comprises two parts with interfitting members normally held in position with a coupling pin. A pyrotechnic device is positioned behind the pin, and upon firing, the pin is moved sufficiently to clear one of the members at least, so that the two members will then separate. The device can be used to permit remotely controlled recovery of a part that is normally mounted together and which are to be separated. The movement of the separating pin after actuation can also be used for energizing a transmitter or signaling circuit that will send out a locator signal to simplify retrieval of the parts to be recovered. The linear actuation of the separating pin ensures simplicity of operation and reliability.