From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Parts list and operating instructions for the Griffin-Sutton Bomb Calorimeter Outfit and Pellet Press.
| Identifier | ExFiles\Box 93\1\ scan0170 | |
| Date | 1st March 1931 | |
| 4 triple blade propellers carried on a stainless steel shaft which runs in three ball bearing journals. it is assured that the temperature rise caused by the stirring is small and regular; it does not exceed 0.003° C per minute and is included in the “radiation” correction. The bomb is placed in the larger tube relative to the spring contact for the electrical ignition, by means of an annular ring on the bottom of the calorimeter. The calorimeter is fitted with two terminals for the electrical connections and a cover containing a sleeve for the insertion of the thermometer. The Outer Jacket or thermal shield* (see right hand side of Fig. A 5460) surrounds the calorimeter, which is located within it by three ebonite pillars. A stout bracket fitted to the calorimeter carries two jockey pulleys and a ball race which locates and supports the stirrer shaft. The Sutton Thermometer (Journal of Scientific Instruments, Vol. VIII., No. 3, March, 1931, page 98) is usually supplied. It incorporates several novel features ensuring precise and convenient measurement. The space above the mercury is filled with low pressure (50 to 60 mm.) Nitrogen, minimising the effect of draughts without introducing stiction. The tube is specially selected to provide an accurate and uniformly divided scale over the whole range. The overall length is about 77 cms. and immersion 15 cms. The thermometer covers a ten degree range and is divided in .01 degrees. A specially designed reading lens may be used, having back and front sights. It is designed to be read at a distance and thus to eliminate errors due to parallax. Other types of thermometer may, of course, be employed, and are listed below. The Pellet Press, is of novel construction and has three main parts. A 5463.—Section of Pellet Press. A.{Mr Adams} An upper part carrying a stainless steel plunger 9/16 in. in diameter which runs on an end-thrust ball race. The plunger spindle projects through the top of the part A where it is threaded and is secured by a knurled nut so that it may be removed for cleaning. B. A central part—the die—which screws into part A.{Mr Adams} C. A bottom threaded portion which is drilled with a small central hole, provided with a large knurled flange. In the upper face of this part is a shallow recess into which there fits one or other of two special plugs, which closes the end of the die before the powdered sample is introduced. An annular “C” shaped ring is supplied to insert between the faces of the parts B and C, if it is desired to compress the pellet from both ends. Method of operation of the Pellet Press— 1. Unscrew A and C from B. 2. Insert in the recess at the top of C, either the solid plug, or, if it is desired to mould the ignition wire into the pellet, insert the plug containing the two small holes. In the latter case thread a single wire of sufficient length through both holes leaving a loop on the inside and bringing the free ends out through the hole in C. (If it is desired to compress the pellet from both ends, place the “C” shaped ring in position on the upper surface of C.) Screw C tightly into B. 3. Introduce the sample into the die hole in B. 4. Screw A and B together until sufficient compression is obtained. (To compress pellet from both ends release pressure by loosening A slightly, unscrew C slightly and remove the “C” shaped ring. Screw B tightly on to C, thus finishing the compression from the lower end.) 5. To remove the Pellet press release by loosening A, unscrew C completely and screw A slowly on to B when the compressed Pellet will be ejected by the descending plunger. *If an accuracy exceeding 1 in 500 is desired, this shield should be surrounded by a water jacket A 5467. 5 PRICES. £ s. d.{John DeLooze - Company Secretary} A 5460. GRIFFIN-SUTTON BOMB CALORIMETER OUTFIT, complete, including stainless steel combustion vessel (bomb), outer and inner copper calorimeter vessels with stirring arrangements for driving by motor or hand rotator, pressure gauge with fine adjustment valve for oxygen cylinder and copper connecting tubes, Sutton Thermometer 12 to 22° C., in .01 (or any other range of 10° C. if so ordered), reading lens, pellet press (registered design), ignition wire and valve key .. .. .. r 47 10 0 A 5461. Ditto, but with Beckmann Thermometer, 6° C. in .01, adjustable over a range of 100° C. and without reading lens .. .. .. .. .. .. .. r 46 10 0 A 5462. GRIFFIN-SUTTON COMBUSTION VESSEL (BOMB) of stainless steel with end pieces, inlet and outlet valves .. .. .. .. .. .. .. .. .. .. .. r 24 0 0 Spare Parts and Accessories. A 5463. Pellet Press (Registered Design No. 779133) .. .. .. .. .. r 3 15 0 A 5464. Rubber Sealing Washers, for combustion vessel (bomb) .. .. .. each r 0 1 6 A 5465. Valve for Inlet (“T” in fig. A 5462) .. .. .. .. .. .. .. .. t 0 0 6 A 5466. Valve for Outlet (“O” in fig. A 5462) .. .. .. .. .. .. .. t 0 5 0 A 5467. Water Jacket, copper, 12¾ in. high, 9¼ in. diam., to surround thermal shield .. .. r 1 15 0 A 5468. Sutton Thermometer, 12 to 22° C. in .01 (or any other range of 10° C. if so ordered) .. p 3 0 0 A 5469. Reading Lens, for above, eliminating parallax .. .. .. .. .. r 1 1 0 A 5470. Beckmann Thermometer, 6° C. in .01, adjustable over a range of 100° C. .. 2 0 0 A 5471. Thermometer, 0 to 50° C., in 0.1, for water jacket .. .. .. .. .. 0 11 0 Any of the above thermometers may be supplied with N.P.L. certificate, prices on application. A 5472.—Hand Rotator. A 5472. Hand Rotator, for stirring, suitable for screwing or clamping to bench .. .. .. r 2 10 0 A 5473. Motors, stirring .. .. .. .. .. .. .. .. .. .. prices on application. Please give specification of mains available. | ||