Thomas L Rollins

US Patent:

51091763, Apr 28, 1992

Filed:

Nov 16, 1990

Appl. No.:

7/614419

Inventors:

Tuan K. Nguyen - Boca Raton FL
Thomas J. Rollins - Boca Raton FL
Charles W. Snyder - Boynton Beach FL
Charles W. Mooney - Lake Worth FL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H01L 4108

US Classification:

310348

Abstract:

Two or more crystal filter blanks are mounted together in such a manner so as to minimize the printed circuit board surface area occupied by their aggregate footprint and to minimize the vibratory and oscillatory interference among the cyrstal filters. Mounting devices are coupled to a first nonvibratory node and a second nonvibratory node of the crystal blanks to minimize vibrational and oscillatory interference between the crystal filters. Insulating material is disposed between the crystal blanks for electrically insulating and physically separating the crystal blanks from each other to additionally minimize electrical and vibrational interference between the crystal blanks.

US Patent:

49492217, Aug 14, 1990

Filed:

Feb 3, 1989

Appl. No.:

7/306009

Inventors:

Thomas J. Rollins - Boca Raton FL
Charles W. Mooney - Lake Worth FL
James I. Jaffee - West Palm Beach FL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H05K 702

US Classification:

361400

Abstract:

An encased electronic component comprises a casing (10) for protecting the component while exposing electrodes (or terminations) thereof for soldering. The casing includes an aperture for allowing air internal of the casing to exhaust upon heating during soldering so as to oppose the ingress of foreign material into the casing.

US Patent:

D3224643, Dec 17, 1991

Filed:

Aug 20, 1990

Appl. No.:

7/569664

Inventors:

William J. Scheid - Coral Springs FL
Joseph E. Laviana - Lake Worth FL
Thomas J. Rollins - Boca Raton FL

Assignee:

Motorola, Inc. - Schaumburg IL

US Classification:

D14191

US Patent:

53075080, Apr 26, 1994

Filed:

May 13, 1991

Appl. No.:

7/698880

Inventors:

Thomas J. Rollins - Boca Raton FL
Charles W. Mooney - Lake Worth FL
Irving H. Holden - Boca Raton FL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04B 700

US Classification:

455 381

Abstract:

A shock isolator (30) is provided within the housing (38) of a selective call receiver to substantially increase the natural frequency of vibration of the housing (38) and the printed circuit boards (54, 56) within the housing. The shock isolator (30) is a body of elastomeric material, preferably butyl rubber, which has component receiving apertures (32) molded therein for receiving the components (46, 48, 50) on the printed circuit board while at the same time contacting the printed circuit board. The butyl rubber has a damping of at least 25% (preferably 50%) and a Durometer of between 50 and 70 type A (preferably 60).

US Patent:

47544236, Jun 28, 1988

Filed:

Jun 16, 1986

Appl. No.:

6/874737

Inventors:

Thomas J. Rollins - Boca Raton FL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

G04C 300
G04C 2132
G06F 302

US Classification:

364900

Abstract:

This is a selector circuit for an electronic device such as a pager that has a plurality of functions with each of the functions having a plurality of levels. First and second switches are provided for selecting the functions and levels. A controller such as a microprocessor is responsive to the first and second switches for selecting the functions and levels. The functions are selected by first actuating the first switch and then actuating the second switch while the first switch is maintained actuated. Levels of selected functions are selected by first actuating the second switch and then actuating the first switch while the second switch is maintained actuated.

US Patent:

51720922, Dec 15, 1992

Filed:

Apr 26, 1990

Appl. No.:

7/515036

Inventors:

Tuan K. Nguyen - Boca Raton FL
Thomas J. Rollins - Boca Raton FL
Harold Holden - Boca Raton FL
Charles W. Mooney - Lake Worth FL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04Q 130
G08B 522

US Classification:

3403111

Abstract:

A selective call receiver includes a vibrator (206) for generating alerts. The vibrator (206) includes a housing (402), a flexible member (2) within the housing (402) and coupled thereto, and a moving member (404) coupled to the flexible member (2) for movement about an equilibrium position, the moving member (404) including a permanent magnet (410). An actuator includes an electromagnet (412) for causing the permanent magnet (410) and the moving member (404) to move at a first frequency for generating an audible alert and at a second frequency for generating a sub-audible or tactile alert. The movement at the second frequency is substantially transferred to the housing (402) for generating the sub-audible or tactile alert.

US Patent:

49317652, Jun 5, 1990

Filed:

Feb 9, 1989

Appl. No.:

7/308288

Inventors:

Thomas J. Rollins - Boca Raton FL
Charles W. Mooney - Lake Worth FL
Tuan K. Nguyen - Boca Raton FL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

G08B 500

US Classification:

340407

Abstract:

A housing for an alerting system within a selective call radio receiver exhibits substantial space saving characteristics by incorporating both a low profile vibrator motor for silent alerting and a tone generator for audio alerting. The housing comprises a rigid material defining first and second chambers adjacent and separated by a common wall of the housing, the first chamber containing the low profile vibrating motor, the second chamber containing the tone generator, the housing defining a first port therein for omitting an audio tone from the second chamber and at least one other port therein for providing power to the low profile vibrating motor and the tone generator.