Low volume flow measurement apparatus developed for hearing dysfunction diagnosis but also suited to other applications comprises means (10) defining a cavity operably communicable with the variable volume, a D.C. microphone (15) responsive to ambient pressure changes in the cavity due to variations in said volume, and a reference diaphragm (17) operably connected with the cavity and moveable under servo-control responsive to the microphone to maintain the cavity pressure constant. The cavity wi...

The subject invention relates to an assembly for facilitating the mounting and ejection of a rotatable cutting tool adaptor on a machine tool. More particularly, the subject invention allows a cutting tool adaptor to be manually interlocked with a rotatable spindle permitting standard cutting tools to be rapidly mounted on a machine tool. The assembly includes an elongated tapered tool adaptor shank, with one end thereof being defined by a flange having a V-shaped channel formed circumferentiall...

A speed change pulley of the type having a fixed flange, a movable flange and an annular, diaphragm spring urging the movable flange toward the fixed flange. The diaphragm spring has an outer peripheral Belleville spring portion bearing against the rim of the movable flange and radial fingers bearing on a fulcrum element connected axially to the shaft of the pulley and fixed for rotation therewith. Lugs integral with the free ends of the radial fingers fulcrum on part cylindrical portions on the...

The present invention provides a motor oil change kit, especially for use by do-it-yourselfers, in which all that is needed for conveniently and cleanly changing the oil may be packaged together in a way that increases the chances that the motorist will not become intimidated by the project, but become habituated to this way of getting the oil changed, and that increases the chances that the motorist will unerringly bring the used oil to an authorized collection facility. Four types of kit are s...

A speed change device comprises first and second outer gears, crankpins connected to the second outer gear, and pinions having pin holes for receiving the crankpins and outer gear teeth formed at the periphery thereof. The speed change device is characterized in that the pinion has through holes formed in a star shape, and a support block has a star shape corresponding to the shape of the through holes in the pinion, so that the support block is inserted into the through holes in order to suppor...

A speed change device comprises first and second outer gears, crankpins connected to the second outer gear, and pinions having pin holes for receiving the crankpins and outer gear teeth formed at the periphery thereof. The speed change device is characterized in that the pinion has through holes formed in a star shape, and a support block has a star shape corresponding to the shape of the through holes in the pinion, so that the support block is inserted into the through holes in order to suppor...

A phase change memory comprises: a substrate; an insulation film formed on a main surface of the substrate; a first electrode deposited on the insulation film; a phase change recording film deposited on the first electrode; and a second electrode deposited on the phase change recording film. The phase change recording film contains at least two of Ge, Sb and Te as main constituting elements thereof. The first electrode comprises material of group of Ti, Si and N, or group of Ta, Si and N as main...

A pawl member is formed as an integral structure from a synthetic plastics material, the said member having a pawl tooth extending outwardly from a body part and including a tail for co-operation with an abutment to load the tooth into or out of engagement with a co-operating ratchet formation the member being so designed having regard to its intended context as to operate within the strain limit of the material concerned during normal usage.

A quick change head for article addressing machines to facilitate changeover from one type label form to another. The head, which uses uncut label form material, includes a transfer wheel for transferring labels or information therefrom to the articles being addressed, a feeder pair cooperable with the form margins to advance the form, a trim knife pair to remove the form margins, a guillotine knife to divide the form into strips several labels long, and a combination strip feeder and knife mech...

A gear hub for a bicycle has two co-operating epicyclic gear trains selectively connectable together to a drive input means and to the gear hub under the control of an axially fixed, manually actuable rotatable cam operating on various pawls through axially shiftable cam followers to give a requisite drive transmission path through the gear trains appropriate to the gear ratio selected.