There is no information on how this fuze differs from PIR-22. PIR-22 was made for the 5.0” HVAR and was 6.02” long. It was built to be more impact-resistant and more reliable than PIR-20 (Mk164). Preliminary tests were done in September, 1945.
ID number
ST-RK-13
Title
NIR-2 (Mk144) fuze
Abstract
4.175” long. Steel and brass. This fuze was armed by aerodynamic pressure. It turned out that the pressure did not get high enough below the velocity of sound. Work on this fuze was dropped in favor of the AIR-8. Cutaway showing state of fuze after launch.
ID number
ST-RK-14
Title
DDR-2 or DDR-4 fuze
Abstract
DDR (deceleration-discriminating rocket”) Base Fuzes. These fuzes were developed for use in aircraft rockets that have an underwater trajectory. Deceleration is caused by water drag. Detonation occurs at a certain point in the deceleration. These fuzes replaced the AIR-9, -10, and -11. Early model.
ID number
ST-RK-15
Title
HIR (Mk135) fuze
Abstract
Model 2, slightly modified over original and Model 1. 5.511” long. Brass, steel, phosphor-bronze diaphragm. HIR (“hydrostatic-arming, impact-firing rocket”) fuzes were for shipboard rockets (7.2” rocket, Mk1, 2, 4) and for aircraft rockets for retro-bombing (rockets fired rearward from low-flying aircraft) (7.2” rocket, Mk3, 5). They originated at Caltech and were placed in limited production. 25,000 were produced then abandoned in favor of the smaller MK140. Cutaway model.
ID number
ST-RK-16
Title
Mk140 fuze
Abstract
For 7.2” shipboard rockets (Mk8, 10, 15) and Hedgehog ammunition for Mk10 and 11 projectors. 5.982” long. Steel, plus steel, brass and Zamak die-casting alloy, copper diaphragm seat gasket. Designed to replace Mk135, Model 2, and other fuzes. Development begun July 1942. Difficulties in arming and firing performance halted production; none issued for service use.
ID number
ST-RK-18
Title
Mk156-158 fuze
Abstract
For several 7.2” shipboard rockets (Mk156) and for 7.2” projector charges (Hedgehogs) (Mk158). 7.345” long. Steel, brass, stainless steel, die-casting alloy. These were underwater vane-arming fuzes. Both mark numbers treated as one fuze, developed from prototypes Mk131 and 136. Cutaway version.
ID number
ST-RK-19
Title
Mk100, Model 0 fuze
Abstract
For GPSR 3.5”/4 and GPSR 5.0”/10. Approx. 4.125” long. Bakelite ogive, brass, steel, other materials. This is an adaptation of the T-28 fuze, the original selective-delay nose fuze, which iteslf was a modification of other fuzes. The Model 0 has a 0.05-second delay. Developed ca 1944-1945. Cutaway version.
ID number
ST-RK-20
Title
Unidentified fuze with propeller
Abstract
About 3.75” long. Brass and steel.
ID number
ST-RK-21
Title
Unidentified fuze, with pencilled note “Buse fuze.”
Abstract
About 3.5” long, steel exterior.
ID number
ST-RK-23
Title
PIR-type fuze, model unidentified
ID number
ST-RK-24
Title
Thermometer, Beckman
Abstract
Why this is called a Beckman thermometer is not known. As far as we know it has nothing to do with Arnold O. Beckman. Scale is 0-5c degrees in 1/100s of a degree centigrade. There is an overrange indication to 100 degrees C. Mfg: Brooklyn Thermometer Co. located in either Middletown, NY or Cambridge, MA.
ID number
ST-PH-39
Title
Apparatus for demonstrating Lissajous' curves
Abstract
This apparatus produces visual representations of vibrations, called Lissajous' curves, after French physicist Jules Lissajous (1822-1880). Used in CIT freshman physics lab. Mfg: Max Kohl, Chemnitz.
ID number
ST-PH-37
Title
Potentiometer, type K-2
Abstract
Serial no. 279092. Appears to be Leeds and Northrup model K-2, with some modification to the dials on the right side. See L&N catalog E-50B(3), 1940. Mfg: Leeds and Northrup, Philadelphia, PA.
ID number
ST-PH-34
Title
Geiger counter used in muon experiment
Abstract
From the Carl Anderson Collection.
ID number
ST-PH-33
Title
Galvanometer, deflection
Abstract
Two stationary inner coils and one revolving outer coil. No. manufacturer's mark, but possibly made in the CIT Physics Shop.
ID number
ST-PH-28
Title
Dosimeter, pocket
Abstract
Device used to detect radiation. This one is similar, but not identical to, the early pocket dosimeter built by C.C. Lauritsen at CIT around 1932. Mfg: Lec.
ID number
ST-PH-26
Title
Resistor
Abstract
Serial no. 2059. 10 Ohm resistor. Hartmann and Braun AG, Frankfurt, Germany.
ID number
ST-PH-25
Title
Battery, standard cell, Model no. 2892
Abstract
Patent dates 1893, 1899. Mfg: Weston Electric Co., Newark, NJ.
ID number
ST-PH-24
Title
Microscope eyepiece, double
Abstract
8.5” high. This microscope part from an unknown manufacturer.
ID number
ST-MU-23
Title
Volt-ammeter
Abstract
Model 280. Patent dates are 1894, 1895, 1901. Mfg: Weston Electric Co., Newark, NJ.
