52?^" _ 



BAIRD &TATLOCK (LONDON) LTD. 



5508 

 Peake's Patent Control Boards (Peake's Patent). 



Specially recommended for use with the recorder above, as by means of this instrument the zero can be set 

 at any temperature up to 500" C., and the range made 250 C. across the scale. This makes for a far more open 

 scale and renders the record far more accurate as the smallest differences are easily shown on the open scale. The 

 combination of the Control Board with the recording pyrometer give readings accurate to within 3 or 4 C. at 

 1000* C 



A small 6- volt accumulator most be used with the Control Board, which is practically a very special form 

 of potentiometer, but the connections of this with the standard cell contained within the board are such that 

 variations in the voltage of the accumulator do not affect the accuracy of the readings. 



Bulges. The Control Boards are made to give a range of 25OC. across the recorder chart in the case of 

 platinum, platinum-indium, and 300 C. in the case of platinum, platinum-rhodium couples. In either case the 

 ero can be made any value desired by simply changing the " Range Coil." Several of these coils giving difierent 

 ranges across the scale, for example 500 750 C, 600 850 C., 700 950 C., may be supplied with one Scale 

 Control Board. 



5508 1 Peake's Patent Scale Control Board for use with Single Thread Recorder and adjusted 

 for any one standard temperature range . . 



5509* Extra Range Coil to give an additional standard range 



5510 1 Peake's Patent Scale Control Board for use with Double Thread Recorder and adjusted 

 for any standard range on either side of the recorder 



N.B. Extra Range Coils can be supplied as listed under No. 5509 it being understood that 

 one is required for each side of the double recorder. 



551 1 1 Smal. 6-volt Accumulator. Suitable for use with the above boards. (Only one is 

 required for a double or for a single board) 



SAMPLE THERMO-ELECTRIC PYROMETER OUTFITS. 

 5512* Portable Outfit, for general test work. 



One Portable Pyrometer, range o 1000 C. (No. 5502) 



One platinum, platinum-indium thermo-couple, in porcelain tube 25 in lone with 

 removable steel sheath (No. 5518) 



Four yards of Peake's Patent Compensating Leads (No. 5562) protected by flexible steel 

 sheathing and fitted with tangs at both ends 



13 3 

 1 10 



18 8 



2 12 6 



8 16 



6 16 



14 



16 6 



14 CROSS STREET - HATTOIST GARDEN E-C 



? 



