Bauhaus-Universität Weimar

Titel:
L. E. Knott Apparatus Company: Scientific Instruments, Catalogue 26
Person:
Knott, L. E.
PURL:
https://digitalesammlungen.uni-weimar.de/viewer/image/lit13684/50/
SCIENTIFIC INSTRUMENTS 
45 
No. 22 200 
22-200 MOMENTUM APPARATUS for deriving laws of momen¬ 
tum. The two bodies are held in bi-filar suspension 
adjusted by turning tapered plugs fitting into holes in 
the cast metal rectangular frame. The bodies have 
masses of ratio 1:4, the larger provided with spring 
gun striking attachment operative on both bodies at 
the same time. Complete as illustrated..............$20.00 
22-201 MOMENTUM ATTACHMENT — the two bodies and 
supporting frame as used in No. 22-200 above........ 10.26 
22-182 GRADUATED ARC with ATTACHED CLAMP as used 
in No. 22-200 above............................... 3.76 
22-131 UNIVERSAL STAND as used in No. 22-200 above..... 6.20 
No. 22-220 No. 22-225 
22-220 SECOND LAW OF MOTION APPARATUS — a flexible hardwood strip, two balls and vise as 
illustrated............................................................................. 3.10 
22-221 BENCH VISE CLAMP as used in No. 22-220 above........................................ 1.86 
22-222 FLEXIBLE HARDWOOD STRIP as used in No. 22-220 above.............................. 1.26 
22-225 SECOND LAW OF MOTION APPARATUS for use in hands. The rod to which the ball, within 
the glass tube, is attached, is pulled back against the spring. When released, the rod and attached 
ball fall to floor in parabolic path while the loose ball falls directly to the floor, both striking at 
the same instant....................................................................... 3.76 
22-230 GAGE’S SECOND LAW OF MOTION APPARATUS — a spring within a metal casting so 
actuates a rod that it will shoot forward one ball and allow a second ball to fall by force of gravity. 
In use, the metal casting should be attached to a block or to the top of the table............... 7.75 
STRESS AND STRAIN 
Torsion of Beams, Torsion of Wires, Rotational Vibration, Flexure of Beams 
Young’s Modulus, Tensile Strength of Wires 
No. 23-15 
23-16 HARCOURT TORSION APPARATUS for determining the moment of torsion and the coefficient of 
torsional rigidity of rods of different lengths and diameters. The clamping heads for the rod are 
adjustable along the table to hold any length of rod ; the pointers clamp directly to the rod so that 
the amount of twist or torsion is measured by taking the difference between the displacement of 
one pointer and the displacement of the second as read upon the two graduated arcs. Different 
lengths may be tested by moving the pointers along the rod. Without hanger and weights, but 
otherwise complete as illustrated, including two brass reds of different diameters and two steel rods 
of the same diameters as the brass rods...................................................$3C.0t
        

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