Abstract: The invention relates to an eddy-eliminating arrangement for a towing vehicle.A non-rigid sheet is secured in leaktight manner to at least the sides and top of a transverse section of the towing vehicle, this sheet extending rearwardly and embracing the front part of the towed vehicle and being secured to the latter by springs which keep the sheet stretched in all the relative positions of the two vehicles. The invention is particularly applicable to vehicles which tow caravans.

Abstract: A low-drag truck consisting of a tractor-trailer rig (10) characterized by a rounded forebody and a protective fairing (16) for the gap conventionally found to exist between the tractor and the trailer, particularly suited for establishing an attached flow of ambient air along the surfaces thereof, and a forward facing, ram air inlet and duct (24 and 22) and a plurality of submerged inlets (18) and outflow ports (20) communicating with the trailer (14) for continuously flushing heated gasses from the trailer as the rig is propelled at highway speeds.

Abstract: A mounting arrangement for a ventilation or heating system for passenger vehicles having an air duct located in the interior of the vehicle includes an angularly-shaped profile enclosing the air duct. The profile has an upper end portion secured to a clamping device connected to the side wall of the vehicle and a lower end portion which is positioned within a support element formed of an elastic yieldable material having a pair of projecting lips forming a space therebetween to receive the end of the lower end portion and extended to engage this end portion upon insertion therebetween.

Abstract: A latch mechanism (24) disclosed secures a vehicle seat (10) in a seating position and is selectively releasable to permit movement of cushion, back, and auxliary components (14, 16, 18) on a support linkage (20) to a bed position. The latch mechanism includes a first latch (26) having a latched position for securing the cushion and back components (14, 16) in the seating position. A second latch (28) of the mechanism has a latched position for securing the auxiliary component (18) in a vertical seating position at the rear of the back component. A pair of the first latches are preferably provided at opposite lateral sides of the seat with the second latch therebetween and are releasable in coordination therewith by an actuator (30) of the mechanism to permit unlatching that allows the seat movement to the bed position. A laterally extending connector shaft (96) of the actuator coordinates the releasing of the latches and is pivotally moved by a pedal-actuated member through a pair of cams.

Abstract: A piece of seating furniture, preferably a sofa, comprising a possibly upholstered frame (11) of tubes, some of the tubes (11e, 11f) curving slightly downwards and functioning as a support for loosely placed, coherent seats and backs (2a, 2b) freely pivotal about their connecting line.The piece of seating furniture permits an easy angle adjustment between seat and back and is easy to disassemble and assemble.

Abstract: A restraining apparatus for a child's car seat is provided which includes a U-shaped member pivotally mounted at its terminal ends to the opposite sides of the upper portion of the frame of the seat so as to be movable between positions above the occupant and in front of the occupant, said U-shaped member having a padded shield mounted about the bight thereof. A harness having two shoulder straps and a crotch strap is joined together at one of the ends of each strap. A plurality of slots in the back of the seat structure accepts the shoulder straps which pass through and forward of the seat structure. A slot is provided in the seat structure through which the other end of the crotch strap passes, and means are provided on the underside of the shield of adjustably retaining the other ends of the shoulder straps and for providing a releasable latching means for securing the other end of the crotch strap to said underside of the said shield.

Abstract: A high capacity wagon for silage and the like has a gravity-assisted rear inclined dumping wall with high ground clearance in both the full open and all intermediate positions. A simplified positive latch mechanism for the dumping wall is biased in the latching position and easily released by the operator of a towing tractor. The necessity for tilting the entire body of the wagon to completely dump its contents is eliminated.

Abstract: Apparatus is disclosed for regulating the capacity of a tunnelling machine. The tunnelling machine is of the type having a rotatable cutting head mounted at one end of an arm. The other end of the arm is pivotally mounted on a carrier about a pivot pin whose axis extends transversely to the axis of the arm. A hydraulic rotary drive is provided for rotating the arm about the axis of the tunnel being formed. The regulation apparatus includes a regulator for regulating the rotary drive of the arm in dependence upon the capacity of the cutting head drive. An angle/current transducer is provided for measuring the angle between the axes of the arm and the tunnel. The regulation apparatus is such that the capacity of the cutting head drive decreases as said angle decreases, the reduction in capacity being effected by a reduction in the force applied by the cutting head to the working face.

Abstract: The method and power transmission system of this invention for driving a road planar machine has the cutter unit in a positive mechanical drive with the drive shaft of a machine power unit through a hydraulically actuated clutch mechanism. The wheel traction units for the machine are continuously driven from the power unit by hydraulic motors operated by variable volume displacement pumps. A control system for retaining the power unit at a set rotational speed required for a predetermined cutting or planing load is responsive to a drop in the set rotational speed, resulting from the cutting unit encountering an overload, to actuate the variable displacement pumps to decrease the forward speed of the machine without appreciably reducing the rotational inertia force of the cutting unit. If the cutting unit overload is of a short duration or momentary the set rotational speed of the power unit is resumed.

Abstract: A sonic generator produces a reciprocating force that is transmitted to a tool by a resonant or nonresonant force transmitting member having an output that reciprocates about a neutral position responsive to the force of the sonic generator. A continuous unidirectional force is applied to the sonic generator by a tool carrier. The tool advances intermittently along a work path through a medium responsive to the continuous unidirectional force and the reciprocating force. A gap is held between the neutral output position of the transmitting member and the tool when the tool is unable to advance through the medium responsive to the continuous unidirectional force and the reciprocating force. Specifically, the force of the sonic generator is sufficiently large relative to the unidirectional force to overcome the latter, and to drive the tool holder back away from the tool when the tool is unable to advance along the work path, thereby establishing a protective gap.

Abstract: The invention relates to a device for rotating a body, such as the boom of a roadheader. The device comprises a pivotally mounted yoke having in it a slot in which is slidably mounted a member which is rotatably and eccentrically attached to the body, and a pair of opposed pivotally mounted rams each of which is rotatably attached to the yoke, the rams being operated out of phase such that they cause the yoke to pivot about its mounting, the pivotal movement being translated into a rotation of the body by movement of the member in the slot. Preferably the member is moved to and fro in the slot by means of a third ram mounted on the yoke.

Abstract: A cutter bit assembly having an elongated cutter bit and a bit holder engaged with a bit block. The bit holder and the bit block have an elongated opening for receiving the elongated cutter bit.

Abstract: A hydraulic braking system for agricultural tractor-trailer combinations, taking hydraulic power from a pump on the tractor. The system includes a pressure control valve movable by the main hydraulic service supply to connect the main supply with a chamber in communication with a restricted bore and an outlet for the by-passed braking fluid. A pilot valve responsive to braking pressure, or manually operable, admits fluid to the trailer brakes and operates a check-valve closing a connection between the chamber and a return line for fluid not required for braking. The check valve enables a clean switching action and eliminates any tendency to meter at some intermediate pressure. Both constant flow and constant pressure systems are described. The return line may be connected to a low pressure sink or to the flow at the services outlet port preferably via another check valve.

Abstract: A rod guide apparatus for a reciprocating rod comprised of two substantially identical half sections which include semicircular recesses therein and which are adapted to be lockingly clamped together adjacent opposite sides of the outer periphery of the rod whereby the rod extends through a bore formed by the semicircular recesses in the half sections. By the present invention each of the half sections includes at least one longitudinally extending ridge on a surface thereof within said semicircular recess whereby when the half sections are clamped together adjacent opposite sides of the rod, the ridges are positioned on opposite sides of the rod and deform the bore formed by the recesses through which the rod passes into a cross section of elliptical shape so that the clamped together half sections contact the periphery of the rod at at least four points thereby preventing slippage of apparatus on the rod.

Abstract: A bearing arrangement for cylinders utilized in printing machines serves for supporting a cylinder trunnion in a machine frame. The bearing arrangement is composed of a sliding bushing surrounding the cylinder trunnion, a flange bearing supported in the machine frame and encompassing the sliding bushing. A second bushing is mounted between the flange bearing and the machine frame which has an outwardly radially extending central collar arranged in contact with the internal axial bore of the machine frame and two bonding elements inserted between the spaces in the second bushing formed by said collar and the axial bore of the frame for compensation of misalignment between the bearing and the machine frame when the cylinder trunnion is inserted into the frame.

Abstract: A rolling bearing comprising an outer race and an inner race having interposed therebetween two or more rows of rolling bodies, is described. The most important characteristic of such bearing consists in that the inner race is arranged to support a cantilever shaft, and to this end the said race is formed substantially by two facing disks having interposed therebetween a spacer disk.

Abstract: In a ball bearing including an outer race, an inner race and ball-like rolling members interposed between the two races, the orbit grooves of the two races are non-circular and the orbit groove coefficient F.sub.1 of the outer race is smaller than the orbit groove coefficient F.sub.2 of the inner race.

Abstract: A system for electrically connecting two locomotives coupled in a consist and each having a pair of live electrical receptacles thereon located one at each end on opposite sides of the longitudinal vertical center plane includes an elongated jumper cable having connector heads at each end is permanently mounted on one end of the locomotive by an elongated flexible support having one end attached intermediate the connector heads. A pair of dummy receptacles are mounted one on each side of the locomotive in position to each have one of the connector heads of the permanently mounted jumper cable connected thereto so that, when not in use, the jumper cable extends generally across the end of the locomotive and has one end supported on each side portion thereof and its intermediate portion supported between the two dummy receptacles.

Abstract: This specification discloses a connector for coupling to the edge of a printed circuit board. The connector contains terminals which are staggered in the direction of insertion of the printed circuit board into the connector. Such staggering reduces the peak magnitude of the insertion force. A securing spacer in the connector prevents undesired motion by the terminal and prevents partial insertion of the terminal into the connector.

Abstract: The present invention relates to a connector for electrically connecting a dual in-line package (DIP) to a printed circuit board or the like. More specifically, the invention discloses a lower housing having a plurality of contact members and a movable upper housing which opens the contact members to admit the leads extending from the DIP.

Abstract: An electrical panel connector hold-down adapter which permits electrical cable connectors of various size and shape to be easily and reliably secured to mating electrical panel connectors.

Abstract: A quick disconnect assembly is provided for use in a high voltage circuit. The assembly includes a housing having an elongated cavity closed at one end and open at the second or opposite end. The segment of the cavity proximate the second end is tapered with the narrow end thereof closest to the cavity closed end. A first electrical contact is disposed within the cavity and has a portion thereof disposed on the exterior of the housing. An elongated unit is removably positioned within the cavity and includes an insulated electrical lead having a second electrical contact formed on the end thereof and an elongated sleeve of insulative material disposed within the cavity and encompassing a portion of the lead. One end of the sleeve abuts the second electrical contact and the second end thereof terminates at the narrow end of the tapered cavity segment. A resilient seal piece encompasses a portion of the electrical lead extending from the second end of the sleeve.

Abstract: A telephone connecting device which is capable of being mounted either within a wall to present a flush face plate in which is supported a modular jack for receiving a modular plug of a cord connected to station equipment or on an exterior surface of a wall includes a plastic receptacle which includes facilities for terminating a wall cable and for connecting the wall cable to the jack in the face plate. This permits a craftsperson during an initial visit to a home such as during construction to install a receptacle and to connect the wall cable to the terminating facilities within the receptacle. In order to have service, a customer acquires a face plate having a modular jack supported therein, connects conductors that are connected to contact elements of the jack to the terminating facilities and secures the face plate to the receptacle.

Abstract: An interconnect system is disclosed which enables the interconnection of a plurality of modules, each terminating a different cable, in a single connector. Each module can be used to terminate an individual cable and an assembly of modules are secured together in a single interconnect housing. Thus it is possible, with this connector, to intermix cables of different types such as ribbon cable, jacketed cable, etc., as well as cables of different numbers of conductors and cables having different wire sizes and wire types, for example stranded or solid conductor.

Abstract: The disclosure relates to an improved terminal block in which each terminal is barrel shaped with a flared skirt, which locks the terminal from movement in one direction, and a plate portion of the terminal is bent over to lock the terminal from movement in an opposite direction. The plate cooperates with projecting ears of the terminal to prevent rotation.

Abstract: A quick disconnect male terminal is disclosed having a stem which is inserted into a circular hole in the printed circuit board prior to wave soldering the terminal to the printed circuit board. The terminal is designed to use minimal material, to use little surface area on the printed circuit board, and be easily assembled into printed circuit boards. The terminal stem is embossed with a V-shape to increase its strength and to increase the solder wicking action through the hole in the printed circuit board. The tip of the V-shaped terminal stem protruding through the hole in a printed circuit board may also be flattened as a means of affixing the terminal prior to wave soldering.

Abstract: A light beam scanning device of a construction, in which an image forming scanning optical system is provided with an expedient for preventing spot intensity of a light beam on a scanning surface from falling off at a peripheral region of a scanning object in comparison with its center part, and a light beam modulator is provided with an expedient for making constant a length of a single dot drawn by a beam spot with respect to one modulating signal on the scanning surface.

Abstract: A dual directional, wavelength demultiplexer including an optical fiber mounted and adhered to a curved surface having a clad single-fiber core, a planar surface extending partially into and along the fiber through the cladding, a prism mounted on the surface having two reflective surfaces positioned to receive multiple signals from the fiber travelling in opposite directions, optical gratings positioned at the reflective surfaces effective to diffract and demultiplex the signals, and photodiode arrays mounted adjacent the prism to receive the demultiplexed reflected signals.

Abstract: This invention relates to a solar radiation reflector which can be fabricated from readily available, relatively low-cost materials with a minimum of effort and materials. The reflector consists essentially of a laminate of (A) at least one reflective metal foil layer possessing a weather-resistant protective coating on its reflective side and (B) at least one layer of cellulosic material impregnated with a weather-resistant cured polymer composition. Preferably, the metal foil is aluminum foil coated with a weather-resistant coating of silicone resin and the cellulosic material is a single layer of corrugated cardboard impregnated with a weather-resistant silicone resin composition.

Abstract: This invention is concerned with a device for simulating the view of a television or movie camera to assist the technical picture taker in selecting the size of the frame of the scenes to be viewed. There is a front opening which can be changed by inserting frames of different size openings into a slot above the opening. There is a rear opening adapted to permit the eye of the camera technician to look therethrough. A storage compartment is located below the viewing area for storing the various frames having different size openings. A handle assembly is located beneath the front lower portion to enable the technician to hold the viewer while he is looking through it to determine the frame size desired.

Abstract: Method of and apparatus for operating an electro-optical system for producing high quality images from a liquid crystal light valve.A polarized projection beam is directed to the reflective surface of a liquid crystal light valve for polarization modulation by means of an input image. The beam is polarization analyzed to thereby generate an output image which typically suffers from color and brightness defects caused by economically unavoidable tolerance variations in the electro-optical system. A second beam of light is generated having a light of a selected color different from the projection beam, is spatially varied in intensity by a spatially graded filter, and super-imposed on the output image so as to eliminate the color and brightness defects as well as enhance color contrast and brightness of the image.

Abstract: An electro-optic material has at least a pair of confronting elongated electrodes formed on at least one surface thereof. Preferably, each of the electrodes has a plurality of elongated, spaced parallel fingers which interleave with each other (sometimes called "interdigital electrodes"). When a high-frequency signal is applied across the electrodes, the refractive index changes in a linear or nonlinear manner within a layer of the body of the electro-optic material which is near the electrodes. The amount of the index change may be varied by a proper selection of materials, signals and geometrical material configuration.

Abstract: An electro-optical cell, more particularly for display purposes, which comprises a working electrode having an intercalatable layer structure, especially graphite, a counter-electrode, an ion conductor disposed between the two electrodes and, if desired, a reference electrode. On application of an electric voltage, ions from the ion conductor are inserted into the layer structure, whereby or visible, optical change on the surface of the electrode is effected.

Abstract: A projector comprises a substantially horizontal table, a substantially centrally above the table arranged projection optics (2), a light source (3) which is located above the table and arranged to illuminate the table, a deflexion mirror (4) for substantially horizontal deflexion of a light radiating vertically upwardly from the table, and a light shaft (5) which at least partially screens off the area between the optics (2) and the table (1) from the surroundings and is characterized in that a covering (6a) is arranged to be laid out over the table surface in that the upwardly facing surface of the laid out covering is light-reflecting, while the table surface is light-absorbing preferably black and mat, alternatively that the upwardly facing surface of the laid out covering is light-absorbing while the table surface is arranged to emit light vertically upwardly.

Abstract: A vibration stabilized image projection system includes a viewing screen supported on a vibratory platform, an image projector supported off the platform in a relatively vibration-free environment for projecting an image toward the screen, and an image stabilizing lens interposed between the projector and screeen for providing an optical link between them. The stabilizing lens is supported on the platform for undergoing vibratory movement therewith in X, Y and/or Z planes and relative to the projector. The lens focuses the image at a stationary position on the screen as the stabilizing lens, screen and platform undergo vibratory movement relative to the projector.

Abstract: A plotting apparatus for plotting on a light sensitive material uses an optical head with an adjustable aperture plate to project a light beam through changeable apertures onto the light sensitive material. Encoding means are associated with the various apertures of the plate and comprise detectable indicia corresponding to the optical characteristics of the apertures. A detector on the optical head senses the indicia of the individual apertures as the plate is adjusted and sends signals corresponding to the identity of such characteristics to a control device responsible for adjustment of the plate or other component in the plotting apparatus.

Abstract: A reflection photometric apparatus for camera including focal plane shutter includes a photoelectric transducer element which determines reflected light from a first blind surface of a shutter and a film surface. A sample-and-hold circuit maintains an integrated voltage which is formed by an integration of a photometric output from the transducer element, and a summing amplifier circuit appropriately corrects the integrated voltage.

Abstract: A device for mechanically moving the instantaneous image spot of a cathode ray tube at right angles to the scan direction with respect to a photographic film on which the total image is recorded by vibrating a portion of the imaging system so that the spot moves at a higher relative speed at right angles than at the normal scan direction so that the information on one scan line occupies all, or very nearly all, of the space between the scan lines as they are projected on the film.

Abstract: A multiple image camera sequentially exposes upon a section of a roll film a number of images of an oscilloscope that displays images of a patient subjected to a scanning device. The oscilloscope, together with a folded optical system, is mounted to move bidirectionally transversely of the film which itself is transported bidirectionally so as to enable multiple exposures of the oscilloscope in different arrays on the film. After exposure of a selected number of images, the exposed film section is cut and a previously disengaged transport mechanism drives the cut film section into a detachable cassette.

Abstract: A diaphragm control apparatus for combined use of an electronic flash with a camera includes a changeover switch which assumes different positions depending whether a flash photography utilizing a usual electronic flash, a flash photography utilizing a devoted electronic flash or normal photography is involved. The apparatus operates to produce a signal indicative of the use of a devoted electronic flash which predominates whenever the devoted electronic flash is mounted on the camera if the changeover switch assumes its position indicative of the use of a usual electronic flash, thus automatically establishing a diaphragm value in a camera which is associated with the devoted electronic flash.

Abstract: Apparatus for stopping the motor of a motor drive mechanism in a camera is disclosed. The motor drive mechanism is of the type in which the motor is started driving by a film winding start signal and is stopped by a signal obtained at the moment of a film winding end signal being produced. Apparatus for stopping the motor according to the invention comprises a timer circuit and means for detecting an abnormality. The timer circuit normally outputs a first signal after the generation of the film winding start signal and before the generation of the film winding end signal, and also outputs a second signal after the generation of the film winding end signal. If the film winding end signal is being generating at the time of output of the first signal or if the film winding end signal has not yet been produced at the time of output of the second signal, said abnormality detecting means delivers to the motor drive mechanism a signal for stopping the motor.

Abstract: A data storage file, for use with removable data storage media, is provided with a latch mechanism. The removable, data storage media, is provided with a containing protective sleeve.When the removable media, contained within the protective sleeve, is inserted into the data storage file, the latch mechanism actively retains the removable media, allowing the independent withdrawal, from the data storage file, of the protective sleeve, leaving the removable media loaded in the data storage file.When the protective sleeve is re-inserted into the data storage file, so as to contain the removable media, already loaded in the data storage file, the latch mechanism lets go of the removable media, allowing the withdrawal, from the data storage file, of the removable media, contained in and together with the protective sleeve.The protective sleeve actively retaining the removable media, the removable media is within the protective sleeve at all times if it is not loaded in the data storage file.

Abstract: Image forming apparatus includes a feeder unit feeding a recording member, processing devices forming an image on the recording member, an input and output device having a port selectively usable for data input and output, a selector device for determining whether the port of the input and output device is used for data input or output, an instruction device connected to the input and output device and supplying enable instructions to the feeder unit and processing devices, and a display connected to the port and interrupting a normal display to display indications corresponding to the signals appearing on the port in response to the selector device determining that the port is used for data input.

Abstract: An apparatus which regulates the developability of a conductive developer mixture by controlling the concentration of toner particles therein. The concentration of toner particles in the developer mixture is adjusted in response to the sensed conductivity.

Abstract: A box type contact printer for photographic plate making is disclosed. A lower frame and an upper frame positioned thereon, the latter being made of a transparent material, are pivotally connected to each other at their rear ends so that a photosensitive material and an original picture put thereon may be positioned between the two frames, and a shield box having a front opening for covering the frames includes an exposure light source in its inside top. The front opening is adapted to be covered by a roll-up curtain. At least one lower front corner portion of the side walls of the shield box is diagonally cut off, and the upper frame is provided with a shield plate which is disposed so as to shield the cut-off portion of the cut off side wall when the lower and the upper frames are closed.

Abstract: A combined sighting target and bracket adapted for receiving a reflector housing for use with electronic distance measuring instruments in surveying and other civil engineering applications. The unique structure permits adjustment of three parameters that render the present invention generally compatible for use in conjunction with virtually any kind of electronic distance measuring instrument. One such adjustment, namely, vertical displacement between a reflector housing and the sighting target, permits duplication of any offset distance that exists between a telescope and ranging optics of the remotely located measuring instrument. The other adjustment features include elevation and azimuth angle variations that permit orientation of the reflecting device to be virtually normal with respect to the incoming and reflected laser, infrared, or other such energy commonly used by such electronic distance measuring instruments.

Abstract: An apparatus for hydrodynamically focusing particles to permit counting and classification of the particles, which apparatus includes a flow nozzle terminating in a capillary nozzle that forms a thin stream containing the particles and having a circular cross section with the particles oriented along one axis of the thin stream, and a jacket pipe enclosing the capillary nozzle for providing an entraining stream for the thin stream of particles leaving the capillary nozzle, is further provided with a further flow nozzle located downstream of the capillary nozzle and presenting a circular cross section for receiving the stream leaving the capillary nozzle, and changing its cross section from circular to rectangular such that the stream exits from the further nozzle with a rectangular cross section, a device directing a laser beam normally to one flat side of the rectangular cross section at a location downstream of the further nozzle, and a radiation detector disposed for detecting radiation resulting from impi

Abstract: An improved nephelometer is disclosed comprising a cruciform housing having therein helical flow diverters for providing a helical water flow pattern so as to cleanse the inside of a sample tube. A regulated light beam is incident on the sample tube and sample. The transmitted portion of the light is measured and used in a feedback loop to control the incident bulb intensity and the scattered portion of the light is measured to provide a measure of the turbidity of the fluid under test. The housing of the nephelometer is a hermaphroditic molding of plastic so as to simplify construction and assembly. All parts mounted within the nephelometer are located by recesses molded into the two halves of the housing. Amplifier circuitry for the output of the scattered light detecting photosensor is disclosed, as is lamp regulator circuitry for feeding back the value of the transmitted light, so as to adjust the incident light, for ramping the bulb on and off and for keeping it in a low current condition.

Abstract: A shape detecting apparatus comprises a slit projecting means for projecting a slit image on a three-dimensional object such as a soldered area, a positioning means for positioning the three-dimensional object relative to the slit projecting means, an image pickup means for two-dimensionally scanning the slit image projected by the slit projecting means to pickup the image, a light segment extracting circuit including a center position extracting means for extracting a mean position (Z.sub.1 +Z.sub.2)/2 of two position signals Z.sub.1 and Z.sub.2 at which a video signal derived by transversely scanning the slit image by the image pickup means corresponds, to a first higher reference V.sub.1 when the video signal exceeds the first higher reference V.sub.1, a maximum value position extracting circuit for extracting a position Z corresponding to a maximum value of the video signal when the maximum value of the video signal is no higher than the first higher reference V.sub.

Abstract: An apparatus for kneading particulate to granular materials comprising a container in the form of a bottomed hollow cylinder, a vertical shaft disposed in the center of interior of the container and rotatable by a motor assembly, pivotal arms mounted on the vertical shaft and turnable only upward and downward, agitating rolls rotatably supported by the pivotal arms each at one end of the arm and each having a recessed outer peripheral pressing surface, and pressure adjusting assemblies each provided between the vertical shaft and the other end of each of the pivotal arms, the pressure adjusting assembly comprising a cylinder member, a rod and means housed in the cylinder member for biasing the rod in directions opposite to each other.