INVESTOR BOOSTS TRANS-LUX <TLX> STAKE Investor Albert Kahn said in a statement that a group he heads increased its stake in Trans-Lux Corp to 8.9 pct from 8.1 pct on a fully diluted basis. Kahn said he indicated in a filing with the Securities and Exchange Commission that his group bought an additional 7,300 Trans-Lux common shares and 100,000 dlrs of nine pct convertible subordinated debentures due 2005, convertible into an additional 6,803 shares. Kahn said he is considering seeking representation on the Trans-Lux board and starting a proxy contest in connection with the upcoming annual meeting. Kahn also said he is seeking an examination of the Trans-Lux shareholder list and corporate books and records under Delaware law. Trans-Lux is a Connecticut concern that leases teleprinters and display units in brokerage offices, airports and other public places. Kahn is a Miami insurance executive and investor.