Abstract: A jack plug has a contact tip provided at the free end and followed by a connection part which is received by a tubular shaft of the jack plug. The contact tip with the connection part is electrically insulated from the shaft. At the side remote of the contact tip, the shaft has a handle part through which the connecting cable runs. The connection part which is formed in one piece with the contact tip has a bore hole which penetrates it over its entire length and which extends into the interior of the contact tip. The conductor of the cable to be connected can be secured in the interior of the contact tip by a material engagement or a positive engagement (crimping). The portion of the bore hole located in the contact tip is filled wit a solder and, if required, with flux. A zone of the handle part is grooved or knurled on its inner side. This zone is narrowed in diameter by radial squeezing (crimping) after the cable to be connected is inserted.

Abstract: The holder is used for a notepad formed of a stack of note slips which are connected with one another at one of their edges. It has a concave, arc-shaped or gutter-shaped support for the notepad. This support has two edges parallel to its imaginary generating straight line. These two edges project away from the concave support surface. One of the edges has a height (h) which corresponds roughly to the height of the notepad to be received by the holder. The distance (A) between the two edges measured along the concave support corresponds to the width (B) of the notepad to be received. The edge whose height (h) corresponds roughly to the height of the notepad projects away from the concave support approximately at a right angle.

Abstract: The contact element for electrical connectors, in particular for audio connectors, is stamped out of a starting material in sheet form. It has two fork-like legs having projections directed opposite one another at their free ends for the purpose of making contact diametrically with a contact element in the shape of a pin or strip which can be inserted between the fork-like legs. The contact-making boundary edges of the projections extend in a straight line. When the contact element is not loaded, these straight boundary edges enclose an acute angle with the center axis of the contact element, which acute angle corresponds to the deflecting angle of the legs when the pin-shaped or strip-shaped contact element is inserted. The portion of the contact element remote of the projections is constructed as a curve and a web leading to the terminal lug of the contact element adjoins the central portion of this curve. The contact element is substantially shaped like a tuning fork.

Abstract: A jack plug has a plug housing formed by two shells and a cable bushing which can be screwed on a thread provided at the plug housing and penetrated by the cable to be connected. The outer contact shaft is formed integral with one shell of the plug housing, which shell is formed of metallic material. The outer contact shaft or its longitudinal axis is disposed at right angles to the dividing plane of the plug housing. A cylindrical neck which has the thread and is substantially closed circumferentially is provided at the end of one shell. A hook-like abutment is formed on at the end of the shell located opposite this neck. The other shell has a cut out portion at one end for receiving the abutment. At its other end side is arranged a pin-like projection which is received in a correspondingly constructed slot provided in the neck having the thread. The cable bushing screwed onto the thread engages in a positive locking manner over this slot and the projection received by the latter.

Abstract: A jack plug has a contact bulb provided at its free end having a contact shaft serving for the electrical connection of an electrical conductor. The contact shaft penetrates the center of a tubular shaft of the plug serving as an external contact. An insulating material is provided between the contact shaft of the contact bulb and the tubular shaft. The shaft serving as external contact continues into a portion at the side remote from the contact bulb. The portion extends beyond the inner end of the insulating tube and has a greater diameter than the shaft. This portion is received by a gripping sleeve. The portion has axially parallel notches proceeding from its free front side. These front sides of the portion contact corresponding inner surfaces of the gripping sleeve which is screwed on by means of an internal thread. The notches extend substantially along the entire axial length of the portion. The internal thread of the gripping sleeve is provided at the side facing the contact bulb.

Abstract: Electrical plug-in connection includes two plug parts to be coupled. Each plug part has a plug housing with a contact element carrier arranged therein, which contact element carrier is outfitted with contact elements and is produced from electrically insulating material. One plug part has an axially parallel pawl with a ratchet, and the housing of the other plug part has an undercut cooperating with this ratchet in the manner of a locking bar. The pawl carrying the ratchet is cut out of and free from the outer surface area of the plug housing by two notches extending substantially axially parallel at a distance from one another and a notch extending transversely relative to the latter. The substantially axially parallel notches extend along a first housing portion to be received by the other plug part and along an adjoining second housing portion. The second housing portion has an outer diameter which is larger than that of the first housing portion.

Abstract: An electric plug-and-socket connection includes two cylindrical plug-and-socket connectors. Contacts are located in walls of the connectors. One contact is a rod of solid cross-section, wherein part of its cross-section protrudes over the entire length thereof beyond the groove receiving the rod. The other contact has an elastically deformable contact spring member which extends from the wall of a contact support in the direction of the circumference of the contact support and at an increasing distance from the wall of the support.

Abstract: A first and a second connector member adapted to be plugged together to establish an electrical connection therebetween are each formed to include a housing member, a contact element carrier made of electrically insulating material mounted within the housing, and elongate contact elements mounted in the carrier and adapted to be placed in electrical conducting engagement with each other when the first and second connector members are plugged together, the contact elements being arranged to be brought into abutting engagement in pairs with their longitudinal axes extending parallel to each other, the contact elements including contact portions which comprise at least parts thereof having a generally planar configuration, with the contact elements being supported in the carrier so that the planar portions thereof are arranged with their planes extending perpendicularly relative to each other when the first and second connector members are plugged together.

Abstract: A pair of complementary electrical connector members adapted to be electrically engaged with each other are formed with a housing having a contact element carrier located therein with a clamping sleeve within the housing having one end in abutting engagement with an end of the contact element carrier. The opposite end of the clamping sleeve extends axially beyond the housing and is formed with a tapered configuration about which there is engaged a clamping ring which is threadedly tightened about the housing to bring the clamping sleeve into engagement with the contact element carrier. The contact element carrier in each connector member is formed with elongated contact elements thereon which extend axially of the assembly and which have connector ends adapted to have electrical wires extending through the clamping sleeve connected thereto.

Abstract: In providing stereophonic reproduction of sound in the passenger space of a motor vehicle, a pair of speakers are located at the opposite ends of the dashboard ahead of the driver, one for reproducing the left signal of a sound recording and the other for reproducing the right signal. In addition, at least one of a summation signal made up of the left signal and the right signal is provided from a speaker located at the dashboard between the pair of speakers, and a differential signal, made up of the left signal and the right signal, is directed forwardly from the rear of the passenger space. Further, the differential signal can be made up only of middle and lower frequencies supplied to one rear speaker with another rear speaker turned 90.degree. relative to the one rear speaker and radiating the differential signal to opposite sides of the passenger space. An electronic delay can be incorporated into the rear speakers.

Abstract: A percussion drill machine includes a drill shaft with a chuck for a drilling tool and a percussion device for imparting percussive force to the drilling tool held in the chuck. Each of the driving shaft and the percussive device has a separate electrical motor. The electrical motors can have a common stator or each motor may have its own stator. Each electrical motor has its own rotor and shaft. The shafts can be arranged coaxially with one being a hollow shaft laterally encircling the other. In another arrangement the shafts can be disposed in laterally spaced parallel relation.

Abstract: An electrical connector assembly particularly adapted for attachment to the chassis of an appliance including a housing defining a generally longitudinal axis and an insertion piece having therein electrical contact elements for effecting desired electrical connection, the insertion piece being received within the housing from one end thereof. A flange on one end of the insertion piece engages the housing to act as a stop member when the insertion piece is placed within the housing and a slotted recess extending transversely to the longitudinal axis defined in the insertion piece a distance from the flange receives a locking lug pivotally mounted within the recess. A bore extending through the insertion piece into cooperative relationship with the locking lug enables a tool to be inserted therein to pivot the locking lug between a locking position to effect locking engagement between the insertion piece and the housing and a nonlocking position releasing this locking engagement.

Abstract: An audio-frequency generator applies signals to a unit under test. The output of the tested unit is applied selectively through either an amplifier having a linear or a logarithmic characteristic to a push-pull output stage driving a rotary coil measuring instrument. The latter drives a recording stylus. An electronically controlled paper drive is coupled to the wiper arm of a potentiometer. The voltage picked up by the wiper arm is applied to the audio-frequency generator to control the frequency thereof.

Abstract: A housing for an electric plug or the like is formed with an axial bore which tapers toward an inlet opening. A pressure member received in the bore for movement toward and away from the inlet opening in conforming engagement with the housing has a face which radially approaches a counter face in the bore for clamping a cable therebetween during axial movement of the pressure member toward the inlet opening. A tubular clamping member, substantially coaxial with the bore of the housing, carries threads matingly engaging threads on the pressure member about the axis. An abutment of the clamping member engages an external rim portion of the housing about the inlet opening and limits threaded movement of the clamping member inward of the bore, whereby the pressure member is moved axially toward the inlet opening, and a cable passing through the tubular clamping member into the bore of the housing is clamped between the face of the pressure member and the counter face.