Abstract: The waterproof connector in which an O-ring is attached to a front end of a connector housing by a supporting ring, and the O-ring is prevented from falling from a connector housing even the supporting ring is in a preliminarily locking state.

Abstract: The resin composition of the invention comprises as resin components specific aromatic polyamide (A), a specific graft-modified polymer (B), an aliphatic polyamide (C), and plural antioxidants comprising a hindered phenol type antioxidant (D) having a molecular weight of not less than 500 and a TGA 10% weight loss temperature of not lower than 300.degree. C. and a sulfur type antioxidant (E) having a molecular weight of not less than 600 and a TGA 10% weight loss temperature of not lower than 280.degree. C. The connector of the invention has housing formed from the above-mentioned resin composition. The resin composition of the invention shows excellent heat resistance. The connector of the invention is lightweight and is excellent in heat resistance, water resistance and chemical resistance.

Abstract: A local area network system in which a logical ring is formed by at least part of said node stations to pass a token frame from one station to another in an endless and cyclic fashion allowing each of said node stations which has received is allowed to transmit data, and said data comprises event data. Since only the stations holding the token are allowed to transmit cyclic data and event data, each station is not required to be equipped with a monitoring timer so that not only the LAN can be constructed economically but also transmission efficiency can be improved through speed up in determining the completion of data transmission.

Abstract: A waterproof electric connector is provided which renders an inserting operation easy by incorporating waterproof plugs into a connector housing. It includes a connector housing having a plurality of terminal-accommodating cylinders and a waterproof plug retaining member having terminal-inserting openings corresponding to the terminal-accommodating cylinders. Waterproof plugs are engaged with and fixed by the waterproof plug retaining member. Terminals connected to electric wires are inserted into the waterproof plugs through the terminal-inserting openings. The waterproof plugs are mated tightly with the inner surfaces of the terminal-accommodating cylinders.

Abstract: An incomplete fitting prevention connector wherein an insertion portion for a fixing bracket is provided at a female connector housing; a slide member is slidably provided on the female connector housing in abutment relation to a male connector housing inserted into the female connector housing; a retaining pawl is formed on the slider member so as to project to the insertion portion. Only when the male and female connectors are completely fitted together, the retaining portion of the slider member can be fitted relative to an engaging portion of the fixing bracket. Accordingly, the incomplete fitting between the male and female connector housing can be prevented.

Abstract: A manufacturing process for a pressure connecting terminal which includes an electrical wire connection portion having a slot for pressuring and electrically connecting an electrical wire therewith is disclosed. The pressure connecting terminal is manufactured by punching a blank out of a flat metal base plate in accordance with a predetermined pattern and folding said blank into a predetermined shape. Further, said manufacturing process comprises the steps of: punching said flat base plate so as to create at least said slot; plating at least said slot which is created in said punching step; and folding said blank into said predetermined shape after said plating step.

Abstract: A detector circuit for coupled connectors is provided with one connector housing, the other connector housing and a lock confirming slider. A sensor circuit terminal and a short-circuiting terminal are oppositely arranged in respect to the one connector housing and the lock confirming slider. Springs are arranged between the terminals. The lock confirming slider is moved forward by the springs when both connector housings are completely fitted to each other. Thus, the sensor circuit terminal and the short-circuiting terminal are contacted to each other.

Abstract: A connector apparatus having a coupling detecting function which has a highly reliable electric connection between the coupling detecting electrical contact elements. The connector apparatus includes a resilient locking arm and a cooperable engaging element provided on first and second housings, respectively. A pair of coupling detecting contact elements are disposed in a movement-permitting spacing of the first housing for the locking arm, and each has a contact portion which is displaced in response to displacement of the locking arm. A short-circuiting contact element is secured to the engaging element. When the two housings are coupled completely to each other, the coupling detecting contact elements are allowed to contact with the short-circulating element to establish an electrical connection between them.

Abstract: Two mating connector housings are connected and locked together by a resilient lock arm formed on a first connector housing and an engagement portion formed on a second connector housing that cooperates with the resilient lock arm. The first connector housing is also provided with a lock verification slider that can be advanced toward the first connector housing only when the two connector housings are completely connected. A pair of engagement detection terminals are provided to either the first connector housing or the lock verification slider, and a short-circuit terminal is provided to either the lock verification slider or the first connector housing so that it faces the pair of engagement detection terminals. The pair of engagement detection terminals and the short-circuit terminal make up a connector engagement detection circuit.

Abstract: In a packing support arrangement for a waterproof connector in which a annular packing is fitted on an outer peripheral surface of a connector housing, the improvement comprising, support portions formed on the outer peripheral surface of the connector housing for supporting a front end portion of the annular packing, engaging recesses formed on an inner peripheral surface of the annular packing for receiving the support portions, and a reinforcement receptive portion formed at the front end portion of the annular packing and reinforced by the support portions. Accordingly, a smooth fitting relative to a mating connector housing can be maintained, and also deformation of the packing is prevented, thereby attaining a stable sealing purpose.

Abstract: A detector circuit for coupled connectors is provided with one connector housing, the other connector housing and a lock confirming slider. A sensor circuit terminal and a short-circuiting terminal are oppositely arranged in respect to the one connector housing and the lock confirming slider. Springs are arranged between the terminals. The lock confirming slider is moved forward by the springs when both connector housings are completely fitted to each other. Thus, the sensor circuit terminal and the short-circuiting terminal are contacted to each other.

Abstract: A hydraulic damper according to the present invention includes a cylinder, working fluid disposed in the cylinder, a piston partitioning the cylinder into two fluid chambers and including passages therethrough for providing fluid communication between the two fluid chambers, and a damping force generation mechanism. The damping force generation mechanism includes a large diameter valve disc mounted adjacent the passages, a smaller diameter valve disc stacked against the large diameter valve disc, an inner pressure chamber formed adjacent and in fluid communication with the passages, and an outer pressure chamber formed adjacent and in fluid communication with the passages and formed radially outwardly of the inner pressure chamber. A partition wall is formed between the inner and outer pressure chambers and a passage is formed through the partition wall for communicating between the inner and outer pressure chambers.

Abstract: A detector circuit for coupled connectors is provided with one connector housing, the other connector housing and a lock confirming slider. A sensor circuit terminal and a short-circuiting terminal are oppositely arranged in respect to the one connector housing and the lock confirming slider. Springs are arranged between the terminals. The lock confirming slider is moved forward by the springs when both connector housings are completely fitted to each other. Thus, the sensor circuit terminal and the short-circuiting terminal are contacted to each other.

Abstract: In an electric connector, a terminal retainer prevents accidental locking of the terminal retainer in a connector housing by requiring two locking steps. The connector housing includes a lid member with a recess which mates with a step of a window which also is provided in the connector housing. The recess mates with the step at two different positions, the first of which is a provisional locking position. At the second position, a locking arm grips the lid member, while the recess mates with the step at the second position. This is a complete locking position.

Abstract: An electrical connector has a protective cover which moves slidably between a first position, which exposes a plurality of metal terminals to corresponding portions of a printed circuit board, and a second position, which covers the terminals. Unless the connector is inserted properly, the protective cover will cover the terminals, preventing contact with the printed circuit board. A detecting piece on a mating connector housing the printed circuit contacts moves the protective cover when the connector is inserted into the mating connector.

Abstract: A pressure contact electrical connector adapted to connect an electric wire by inserting it in a slit of a terminal thereof comprises stripper portions formed on the inlet side of the slit and adapted to strip the insulating coating of the wire; a wide portion extending from the ends of the stripper portions; contact pieces projecting outwardly from the terminal body opposite to the wide portion, the contact pieces being bent back so as to allow the leading ends thereof to be inserted into the wide portion of the slit without contacting the terminal body; and electric wire connecting portions formed continuously with the coating stripper portions.

Abstract: A releasable connector for electric circuits is composed of a male connector housing and a female connector housing adapted to be fittable in each other. One of the connector housings is provided with a resilient short-circuit member while the other is provided with an insulator member. When the two parts are released from each other, the short-circuit member is resiliently urged against the upper surfaces of the terminals in the one connector housing so as to make a short circuit between the terminals. When the two housings are coupled together, the insulator member in the other connector housing wedges in between the short-circuit member and the terminals in the one connector housing so as to break the short circuit made therebetween.

Abstract: A hydraulic shock absorber has a disk valve assembly which is formed by successively stacking up a first disk valve having arc-shaped or circumferentially extending opening provided therein at positions close to the inner periphery thereof, a second disk valve having notches which extend from the outer periphery thereof to the radially outer edges of the corresponding openings provided in the first disk valve, and a predetermined number of annular third disk valves. A respective such disk valve assembly is provided at the downstream end of each of the extension- and contraction-side passages which are formed in a piston. Thus, it is possible to obtain a higher level of damping force in a low piston speed region than in the case of a conventional valve mechanism that uses a fixed orifice, and damping characteristics can be set as desired.

Abstract: There is provided a new connector having an insulated housing formed with chamber means defined by an upper wall and a lower wall, a terminal adapted to be locked in said chamber means, opening means formed in said upper and lower walls to provide communication with said chamber means and insertion pin means to be inserted into said opening means for additional lock of said terminal with the chamber means.

Abstract: Method for manufacturing a tapered rod for a coil spring from a metallic material of mainly steel in a linear state, by imparting heating to the same with a predetermined temperature gradient pattern in the axial direction thereof while or before pulling by tensile force the metallic material chucked at two axially distant points in either direction in a gradually decreasing or stepwise decreasing speed, until a desired tapered portion is formed.