BAIRD &TATLOCK (LONDON) LTD. 



3119-3121 



- 



Straight Line Hand Dividing Machine, for dividing thermometer and barometer tubes 

 and flat and bevel-edged scales. The machine is made to the following sizes : 



3119 T To divide a maximum length of 13! in. 



3120 T 

 3121 1 



24 in. 

 40 in. 



DESCRIPTION. 



This machine, which is well and strongly made, is constructed for dividing thermometer tubes, barometer 

 tubes, and flat or bevel-edged scales. It has a steel leading screw of -5^ in. pitch ; the gun-metal nut is hinged 

 and split so as to be readily disengaged from the screw for moving the carriage quickly along the bed. The 

 ratchet wheel, which is fast on the screw, has 200 teeth. The micrometer wheel is divided into 200 divisions, 

 with figures at every 10 divisions. Thus each division is equivalent to n^y in. traverse. 



The pivoted cutting frame is fitted with cams and adjustable stops in both directions for making every 

 fifth and tenth divisions larger than the others ; there are ample vertical and horizontal adjustments so that 

 deep or wide articles may be divided. The brass bar on the front of the bed has a dovetail groove along its face, 

 and two small bolts, nuts, and plates are provided for fixing small flat scales whilst being divided. The bar 

 also carries two screw clips for holding thermometer tubes, from in. up to ft in. diameter. 



Besides the above-mentioned pitch of -fa in. the leading screw can, if preferred, be cut to any one of the 

 following pitches, viz., fa m -. A i* 1 -. 1 millimetre, 2 millimetres, thus altering the amount of traverse per division 

 of the micrometer wheel. 



The following supplementary parts can be supplied to order, but are not included in the price of the machine : 



1. Tube clips (to fix on brass bar) for holding tubes from f to J in. diameter, or from to ijin. 



diameter ... ... ... ... ... ... ... ... ... per pair 



2. A scale, divided to the pitch of the leading screw, and sliding in a dovetail groove the entire 



length of the bed, and which is read by a pointer fixed to the carriage ... 



3. An adjustable sight tube, with lenses attached to the carriage by means of an arm. This is for 



examining fine scales 



4. Dovetail grooves in bed, with bolts, nuts, and plates for fixing special articles and very wide scales 

 With every machine are sent out three tools for marking the tubes or scales : 



1. For glass. 



2. For boxwood and ivory. 



3. For brass. 



1 15 

 16 



3 10 

 100 





CROSS STREET - HATTOTST GARDETST, E-C 



