The design and construction of an automatic absorption dynamometer for a standard master car builder's drop test machine . ip throughout. When the dynamometer was put together, it wasthought best to screw the two large^plunger fillets ontjieir respective plungers, A packing of ordinary wiresolder w^s put between the diaphragms, two rings beingplaced just inside the bolt holes between the two upperdiaphragms, and two rings between the lower diaphragm 22 and the base. All the nuts were then tightened up hya long wrench and the dynaraometer, weighing about 2600pounds, was carted over to the impac
The design and construction of an automatic absorption dynamometer for a standard master car builder's drop test machine . ip throughout. When the dynamometer was put together, it wasthought best to screw the two large^plunger fillets ontjieir respective plungers, A packing of ordinary wiresolder w^s put between the diaphragms, two rings beingplaced just inside the bolt holes between the two upperdiaphragms, and two rings between the lower diaphragm 22 and the base. All the nuts were then tightened up hya long wrench and the dynaraometer, weighing about 2600pounds, was carted over to the impact machine. Severallight drops were made on it, after which the nuts weretightened again. The necessary piping to connect it withthe supply tank overhead was secured from stock, but aspecial union had to he made to connect with the flexi^blepipe to the indicator. Practically all the machine workon the automatic switch was done by the writer. The prin-cipal difficulty encountered was in drilling and tappingthe mast fot the holts for the grooved pulleys. The apparatus complete is shown by the photographon page 24, 23 IL. riG. 4. PHOTOGRAPH OF APPAPJMUS IH POSITION 24 AJUfOOB THEORY OP THE DYNAJ/OMETER IN EfElAIL Figures 5and 6,page 26, show cards which wece ohtainedfrom the dynamometer, Figure 5 being a card from a five-foot drop on the dynamometer alone, and Figure 6 a cardfrom the test of a gear from the same height of necessary data for the calculations are given witheach card. The ratio of the movement of the small pistonin the indicator to the movement of the pencil point is18 to 100, Therefore, for a height of card of 1 inch, thetravel of this piston is 0,18 inches. The work done on thisindicator piston is the product of the mean pressureper square inch exerted against it by its area in squareinches (r-J- sq, in,), multiplied lay the travel of thepiston in feet, whence the work on the indicator pistonbecomes 54,6 X i X -r-|- = ,41 , since 1 pound pres
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Keywords: ., bookcentury1900, bookdecade1900, bookiddesignconstr, bookyear1909
