X0202 4 2005-12-01 1 0000764765 NORTH PITTSBURGH SYSTEMS INC NPSI 0001101391 SEDWICK JAY L ARMSTRONG GROUP OF COMPANIES, ONE ARMSTRONG PLACE BUTLER PA 16001 0 0 0 1 Former Director Common Stock 2005-12-01 4 G 0 297996 0.00 D 0 I (1) Common Stock 2005-12-01 4 G 0 297996 0.00 A 363709 I (2) Common Stock 400 I (3) Common Stock 24891 D Common Stock 914665 I (4) (1) These shares were held by Armstrong Holdings, Inc., a Delaware corporation in which Jay L. Sedwick is an Officer and Director, but said shares were transferred (see Remark (2) below). (2) These shares are held by the Sedwick Foundation, of which Jay L. Sedwick is a Co-Trustee. Of the total number of shares held by the Sedwick Foundation, 21,075 shares were transferred by NPT Holdings, LLC and as of December 1, 2005, 297,996 shares were transferred by Armstrong Holdings, Inc. to AGOC Investments, Inc., then to Armstrong Utilities, Inc. which then gifted the shares to the Sedwick Foundation. The filing of this report shall not be construed as an admission that the undersigned is, for the purpose of Section 16(a) of the Act, a beneficial owner of the 363,709 shares described herein. (3) These shares are held by the Jud L. Sedwick Family Trust No. 2, of which Jay L. Sedwick is a Co-Trustee. The filing of this report shall not be construed as an admission that the undersigned is, for the purpose of Section 16(a) of the Act, a beneficial owner of the 400 shares described herein. (4) 935,740 shares were held by Armstrong Utilities, Inc., a Pennsylvania corporation in which Jay L. Sedwick is an Officer and Director. 914,665 of the shares were transferred to NPT Holdings, LLC and 21,075 of the shares were transferred to the Sedwick Foundation. Jay L. Sedwick is not an officer/director/member of NPT Holdings, LLC but he is an Officer and Director of Armstrong Utilities, Inc. which is the sole member of NPT Holdings, LLC. /s/ Jay L. Sedwick 2005-12-16