Diaphragms

Some articles on diaphragms, diaphragm:

Northam Bridge - Construction and Dimensions
... The main deck structure has transverse diaphragms and narrowly spaced beams, which were pre-cast on site using deflected cables ... These, together with in situ diaphragms between the ends of the beams, allowed the deck structure to be made continuous for live and superimposed loads ... slabs were in place, the main beams were post-tensioned through the diaphragms ...
Diaphragm (acoustics)
... In the field of acoustics, a diaphragm is a transducer intended to faithfully inter-convert mechanical motion and sound ... The varying air pressure of the sound waves imparts vibrations onto the diaphragm which can then be captured as another form of energy (or the reverse) ... In a loudspeaker, a diaphragm (generally, but not exclusively cone shaped) is the thin, semi-rigid membrane attached to the voice coil, which moves in a magnetic gap ...
Diaphragm (contraceptive) - Fitting
... Diaphragms come in different sizes ... A correctly fitting diaphragm will cover the cervix and rest snugly against the pubic bone ... A diaphragm that is too small might fit inside the vagina without covering the cervix, or might become dislodged from the cervix during intercourse or bowel movements ...
History Of The Single-lens Reflex Camera - General Operation of A 35 Mm SLR
... A photographer using an SLR would view and focus with the lens diaphragm (aperture) fully open he then had to adjust the aperture just before taking the ... Some lenses had manual diaphragms—the photographer had to take the camera down from his eye and look at the aperture ring to set it ... A "pre-set" diaphragm had two aperture rings next to each other one could be set in advance to the aperture needed for the picture while the other ring controlled the diaphragm directly ...
Types of Gas Meters - Diaphragm/bellows Meters
... Within the meter there are two or more chambers formed by movable diaphragms ... As the diaphragms expand and contract, levers connected to cranks convert the linear motion of the diaphragms into rotary motion of a crank shaft which serves as ... Diaphragm gas meters are positive displacement meters ...