I found this article on line from back in the day
THE KELLY HANDLEBAR COMPANY.
Adjustable handlebars are now not only the usual equipment of highest grade bicycles, but the riders of medium and lower priced machines are coming to demand that the same convenience be allowed also to them. This is quite reasonable, since there are a number of makes on the market, and the additional cost is so slight as to be unfelt. A worthy pioneer is the Kelly, made by the Kelly Handlebar Company, of Cleveland, Ohio. Its introduction dates back to 1895. The essential feature of this design is a divided bar with sections
pivotally connected to the stem, and provided with serrations which engage and interlock with corresponding parts in the head of the machine, being held from slipping by means of a clamping bolt. This bolt has, for 1900, taken the place of the old-time cap-screw with good effect. All working parts are made from dropsteel forgings, and the stem is of metal untouched by fire after forging. Thousands of these bars are in satisfactory use in the United States alone.
EDWARD MILLER * COMPANY.
The makers of the Majestic and Everlit acetylene gas lamps brought to the cycle accessories field, five years ago, a half century's successful experience in general lamp manufacture. Oil lights were the sole output of this concern in the cycle line until the season of 1899, when the acetylene gas type was taken up, and so satisfactory has the latter proven that for 1900 it has entirely superseded the older models. In the Majestic for this year the water reservoir is built below the combustion chamber, where it is not affected by the upward radiating heat from the flame. The carbide cup has corrugations at the side marked to indicate the amount of fresh carbide needed for one, two, three or four hours' riding, thus enabling one to calculate very near the expected consumption of carbide and supply accordingly. By this means useless waste is guarded against, and the lamp easily cleaned after each ride without removal of accumulated refuse.
The Prowler.