PATTERN MAKING 



31 



DIVIDERS AND TRAMMELS. 



The ordinary wood- worker's dividers can be bought in many 

 forms, the most common being the screw=adjusting wing dividers, 



shown in Fig. 57. This form is reliable, and is easily adjusted to 

 the required distance between points. Moreover, when clamped by 

 the thumb-screw, it is not liable to be altered by a slight blow 

 in handling. 



Another and improved form is shown in Fig. 58, one leg 

 of which is removable so that a pencil can be inserted. This will 

 be found very convenient for marking and laying out work. 



Fig. 60. 



For spacing the teeth of gear wheels, and for other work 

 in which great accuracy is required, a pair of 2|-inch or 3-inch 

 dividers, such as are shown in Fig. 59, will be found necessary. 



The trammel is used when the distance between the points 

 to be reached is too great for the ordinary dividers. The trammel 

 points are clamped to a beam of sufficient length to enable them 

 to be set to the required distance apart. They may be bought with 

 one adjustable point, as illustrated in Fig. 60; or without the screw 

 adjustment, as in Fig. 61. The points are removable for the 

 insertion of a pencil socket and pencil when needed. 



