The design and construction of an automatic absorption dynamometer for a standard master car builder's drop test machine . namometer is the transfer of the en-ergy from a solid to a liquid, where the force of theblow may be measured. The main difficulty encountered isthat of enclosing the liquid so that its pressure couldincrease with the energy given to the solid body, withoutallowing the escape of ajny of the liquid. Schemes formeasuring the the pressure by a system of levers, as isdone in the ordinary testing machine, can not be used,because of the prohable effect of the sudden blow uponany
The design and construction of an automatic absorption dynamometer for a standard master car builder's drop test machine . namometer is the transfer of the en-ergy from a solid to a liquid, where the force of theblow may be measured. The main difficulty encountered isthat of enclosing the liquid so that its pressure couldincrease with the energy given to the solid body, withoutallowing the escape of ajny of the liquid. Schemes formeasuring the the pressure by a system of levers, as isdone in the ordinary testing machine, can not be used,because of the prohable effect of the sudden blow uponany such arrangement. The diameter of the dynamometerwas limited to 27 inches by the width of the space be-tween the masts. Allowing roughly for a diameter of 20inches for the receiving plunger, it was found that adrop of 25 feet would give a priBSSure of about 2000pounds per square Inch in the liquid under this pressure is too great to be easily measured by or-dinary indicators, and so the plan of uding a reducingplunger was decided upon. With a diameter of the redeiving plunger of 19 inches 11 , h ?v IwO^. ?piG. 3. CROSS-SECT ION VIEW OF DYNAITOMETER 12 AJUIOUHiMSXIXOXB or XXCILNOIAHAX BILL Oy IJATERIALfor ABSORPTION ArticleReceiving PlungerReducing PlungerUpper CollarLower CollarBarrelBase DiaphragmsEye BoltEye Bolt PlugVent Taps and WashersVent PlugPlunger FilletsBolts Check Valves {ir)Stop Cock (i») NO. Material 1 Steel 1 Bronze 1 Cast Iron 1 Cast Iron 1 Cast Iron 1 Cast Iron 3 Bronze 1 Steel 1 Steal 3 Steel 1 Steel 3 Brass 30 Steel 2 Brass 1 Brass Id ani diameters of the two surfaces of the reducing plun-ger of 4 and 12 inches, respectively, then a pressure of1 pound per square inch on the liquid in the lower cavityindicates a total pressure of -^^ .^.-^^ - 3250 pounds4X4 on the receiving plunger. If no liifuid leaks past thecheck valves, and if the liquid is incon^pressible, theplungers should have no travel whatever for any blow;but as these c
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Keywords: ., bookcentury1900, bookdecade1900, bookiddesignconstr, bookyear1909
