104 W. & L. E. GURLEY, TROY, NEW YORK 



ated phosphor bronze band from accidentally slipping over the 

 -pint's on the sprocket wheel when the record is being taken off, 

 prevent any change or mistake being made by the observer 

 \\lnlr handling the register, after it has been properly installed 

 by the engineer in charge. 



Changing the range of the register. Simplicity in changing 

 two gears to alter the range of the register. 



Size of sheets. The record sheets are adapted to convenient 

 filing in standard filing equipment. 



CONSTRUCTION OF No. 633 GRAPHIC REGISTER 

 (The part numbers refer to Fig. 49) 



The base (1) supports the mechanism of the register. An 

 extra heavy eight-day clock (2) is geared to two time screws 

 (3), which are supported at each end as shown. The clock 

 has two large driving springs and has jewelled bearings on tli* 

 escapement shaft. Mounted on the two screws is the pencil 

 carriage (4) which moves forward without lost motion, in 

 accord with the turning of the clock shaft, and which can be 

 lifted up from one position on the screws and placed in 

 another, if desired. The pencil (11) is held in the pencil 

 holder (5), which is free to move vertically in a cylinder (6) 

 projecting from the upper side of the base of the carriage (4). 

 The pencil holder (5) is set and the pencil clamped with a 

 screw (25), so that the weight of the pencil and holder presses 

 down against the paper. 



" The record cylinder (8), on which the paper is placed, is 

 supported at each end as shown. The sprocket wheel (7) is 

 attached to the sprocket wheel shaft (26), and revolves in an 

 eccentric bushing (24). The gear (20) is clamped to the 

 sprocket wheel shaft by the nut (15). The gear (21) is 

 clamped to the cylinder (8) by three small screws. Two 

 guards (9 and 10) prevent the band from slipping over the 

 spines on the sprocket wheel. The bolt (13) is used to lock 

 the cylinder, while changing the record sheet. Extending 

 across the face of the record cylinder (8) is a slot (12), which 

 indicates the point of zero gage height on the record cylinder. 

 Idler pulley (17) is used to spread the metal band so that the 

 counterweight will pass the float. There is a gear (19) on the 



