A mechanism chassis 1 comprises a polygonal flat plate portion 11 for arranging a plurality of mechanisms on a surface of thereof, and a plurality of side plate portions 12, 13, 14, 15 bent from the respective contour sides of the flat plate portion 11 toward a rear side of the flat plate portion 11. The flat plate portion 11 has a high-precision chassis region where those of the mechanisms of which a relatively high precision is required are to be arranged, and a high-strength chassis region wh...

Two playback heads A1 and A2 having the same azimuth .theta. and having a track width W.sub.11 equivalent to about 1.5 times the track width W.sub.2 of the recording head are paired to form a pair of heads. These playback heads A1 and A2 paired to form a pair of heads are arranged so as to read one recording track T1 simultaneously in the condition with a gap of about one track pitch T.sub.P in the track width direction. Data of all recording tracks are thus read correctly without tracking durin...

The head drum assembly for use in a tape recorder comprises a rotating shaft divided arbitrarily into an upper and a lower parts, a rotary drum pressed in and fixed to the upper part of the rotating shaft, the rotary drum having a protruding cylindrical portion with its center coinciding with that of the rotating shaft, a stationary drum attached at the lower part of the rotating shaft through a plurality of bearings, the stationary drum being hollowed out thereby being provided with an inside b...

A rotary head apparatus for recording and/or reproducing an information track to/from a magnetic tape having predetermined orientation characteristics is constructed by: a first magnetic head having a first azimuth angle; a second magnetic head which has a second azimuth angle whose performance is relatively inferior to that of the first magnetic head and forms or reproduces the information track of a width larger than that of the first magnetic head; and a rotating member for rotating the first...

An apparatus for reducing head wear in a helical scan tape transport passes a flow of relatively clean, dry air through a transport housing without allowing the flow of air to flow directly across the rotary head assembly. Air from a fan positioned at a rear portion of the transport cools a power supply and creates a positive air pressure within the transport housing. The air is heated by the power supply before it passes through the transport housing, so that only relatively "dry" air reaches t...

An AC dynamo in which a rectifier, a voltage regulator and brush holders are disposed in stacked relationship, all these elements being secured to an end bracket of the dynamo by common securing means which provide electrical connection means between the elements as well as serve as electrical terminal means.

A multiple total reflection optical device is disclosed with angled ends on optical wave guides in a bundle of optical wave guides. In one embodiment a photocathode imaging system is disclosed wherein the terminal fused plate of a fiber optic bundle is selectively etched to produce a taper at the end of each fiber which is then coated with a photocathode material. Light conducted through the fibers undergoes multiple total reflections down the terminal taper and is dissipated with high efficienc...

A method and apparatus for video signal recording comprises helically scanning a plurality of transducer heads (20-23) sequentially along separate parallel paths (30-32) of equal width on a record medium (10) at a rate such that a plurality of the scans occur within a field interval, and diverting the signal in predetermined sequence to different ones of the heads. The scanning of said heads and diverting of the signal to different heads is arranged to cause some redundant recording of informati...

An elongated tape recording and reproducing system wherein a longitudinal control track is prerecorded on the edge of the tape either with a recording transducer, such as a magnetic head, as part of the system or off-line. After the control track is recorded, oblique video tracks are recorded on the tape with two video transducers or heads spaced 180.degree. apart and traveling obliquely to the recorded control track. During reading of the video information, one obliquely traveling video head re...

In an improved chord organ of the type which includes base and keyboard sections having corresponding reed assemblies provided with openings that are normally closed by extending pallets of keys operative by a user, a spring device is provided for normally urging the key pallet against its reed assembly opening. The spring device includes a plastic unitary body having a plurality of compression fingers extending therefrom for contact with the pallets, there being relative sliding movement betwee...