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).
Comparison and test report for a lightened type Bentley jack.
| Identifier | ExFiles\Box 139\2\ scan0356 | |
| Date | 15th October 1935 | |
| X1166 To Hm{Capt. W. Hallam - Head Repairs}/Ms. C. to Sg.{Arthur F. Sidgreaves - MD} C. to ROR. C. to Ex. C. to L. C. to Wy. C. to Mx.{John H Maddocks - Chief Proving Officer} C. to Hd.{Mr Hayward/Mr Huddy} Lightened Type Bentley Jack. Present Standard Lightened Type Weight of Jack. 6 lbs. 12 ozs. 2 lbs. 13 1/4 ozs.) Decrease Weight of Handle 2 lbs. 12 ozs. 1 lb. 8 1/2 ozs.) of 1 lb. 2 ozs. Min. height. 5.625" 5.4375" ) see sample 2 Max. height. 14.500" 12.8625" ) Test No.3. Sample I. (Tested by Lake & Elliot). Operated 117 times under load of 14 1/2 cwts. This Jack has been inspected by us and found to be satisfactory. Sample II (Tested by R-R.{Sir Henry Royce}) (i) Operated 150 times to max. height under normal jacking conditions on Bentley car. (ii) Car jacked up several times on Fistern Hill. (iii) Having deflated a tyre, a bentley chassis was pulled down giving full negative camber on rear springs. It was found that the Jack could be easily placed under the jacking pad, with approx. .500" to spare. After the tests the Jack was inspected and found to be satisfactory. The finish of the Jacks will be as follows :- Jack Body & Base Plate - Black Jack Pad & Sleeves - Plated Folding "Clip-on" handle-Plated. A Standardisation Sheet is being circulated; hm{Capt. W. Hallam - Head Repairs}/dwg. | ||