ENCE 



[Entered at the Post-Offioe of New York, N.Y., as Second-Class Matter.] 



A WEEKLY NEWSPAPER OF ALL THE ARTS AND SCIENCES. 



Seventh Year. 

 Vol. XIV. No. 341. 



NEW YORK, August 16, li 



Single Copies, Ten Cents. 

 ^3.50 Per Year, in Advance. 



THE MOSCROP CONTINUOUS RECORDER. 



This instrument was invented by J. B. Moscrop of Manchester, 

 England, who designed it especially for the use of manufacturers 

 of textile fabrics. Its services proved so valuable that its use rap- 

 idly extended, not only in Europe, but also in this country. It has 

 found a place in many woollen and cotton mills, electric-light sta- 

 tions, and other places where it is desired to keep an accurate 

 record of the time of starting and stopping an engine, as well as of 

 all variations from a standard speed, with the exact time and ex- 

 tent of such variation. 



The instrument consists of an iron case with glass sides, con- 



of the balls is transmitted to a horizontal arm at the top of the 

 case. This arm carries a marker, which is movable across the 

 paper band upon which the record is to be made. 



When the engine is running steadily at the standard speed, the 

 marker rests at a central longitudinal line on the paper. Sections 

 of this paper are shown at Figs. 3 and 4. Should the speed of the 

 engine be increased or decreased five per cent, the marker would 

 pass to the next line to the right or left, each space passed over in- 

 dicating a variation of live per cent in the speed. When the engine 

 is stopped, the marker passes entirely off the paper, and makes no 

 record until it is brought back to the paper by the starting of the 



FIGS. I AND 2.— THE MOSCROP RECORDER. 



taining an eight-day pendulum clock, which moves a continuous 

 paper band. Upon this band the record is traced by an inked 

 marker, which is actuated by the motion of the governor-balls as 

 they rise and fall under varying speed. Fig. i shows the general 

 appearance of the instrument, and Fig. 2 gives a side view with 

 part of the frame removed, showing the clock-movement and the 

 interior construction. The governor- shaft is actuated by the belt 

 A, which transmits motion from the shaft whose speed it is de- 

 sired to record to a pulley on the lower end of the upright shaft 

 which rises through the middle of the instrument. To this shaft is 

 attached a governor, the balls of which rise by centrifugal force when 

 the shaft is revolved. By means of connecting devices, the motion 



engine. As each transverse space on the paper indicates one hour, 

 and as the paper is moved ahead at unvarying speed by the clock,, 

 the length of the interval between the starting and stopping of the 

 engine is recorded, also the moment and extent of all vari- 

 ations of speed. One paper band is sufficient for a three-months' 

 run. 



Figs. 3 and 4 are copies of actual records taken from different 

 engines, and taken together, show the workings of the instru- 

 ment under different circumstances. The section marked i is almost 

 perfection. The record begins at one minute past seven, and con- 

 tinues till 7.15 ; the narrow line showing plenty of fly-wheel mo- 

 mentum, and the straight line good governing. Section 2, 7.15 to 



