. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. bubble space. 843. ADJUSTABLE BEAM CLAMP. For suspending ironpipes from fireproof ceilings. The sleeve when turned into a quarter turn allows the clamp to be adjusted,and is then locked by turning it backto its original position, the teeth on thehooks engaging in corr
. Mechanical appliances, mechanical movements and novelties of construction; a complete work and a continuation, as a second volume, of the author's book entitled "Mechanical movements, powers and devices" ... including an explanatory chapter on the leading conceptions of perpetual motion existing during the past three centuries. bubble space. 843. ADJUSTABLE BEAM CLAMP. For suspending ironpipes from fireproof ceilings. The sleeve when turned into a quarter turn allows the clamp to be adjusted,and is then locked by turning it backto its original position, the teeth on thehooks engaging in corresponding slotson inside of sleeve. The hooks aresharpened where they extend over theflange of the beam so they can bedriven under the brick. 844. GRAVITY ELEVATOR. A simple arrangement for lowering build-ing material in taking down high build-ings. When the upper story is clearedthe wheel is set on the next floor belowand so on. The brake controls the dif-ference in weight between the empty andloaded barrow. This method of lowering the materialin taking down the old buildings, avoidsthe dust nuisance made by dischargingthe material through a chute. 845. PORTABLE CON-CRETE MIXER. A rotarymixer driven by a steam orcompressed-air engine, withswinging shovels on the in-side of the barrel for thor-oughly mixing the Brace /I ? Vf^ 1st , . Barrow r. Brae Braceoor \Floor Floor
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Keywords: ., bookauthorhiscoxgardnerdexter18, bookcentury1900, bookdecade1910
