Abstract: The mobile water chiller apparatus of the present invention comprises a refrigeration system, a water system and an engine for driving the water and refrigeration systems. The water system includes a thermostatically controlled blending valve to temper warm water from the water supply with cool water from the evaporator heat exchanger of the refrigeration system so as to provide a constant load to the evaporator heat exchanger inlet and an immediate source of cool water.

Abstract: The present invention concerns a method and apparatus to be used in open water for removing an oil layer by towing a generally V-shaped and floating catching means (1, 2, 3) through the water, one arm (3) consisting of a barge comprising a driven pump (13) for sucking the oil collected near the apex of the catching means (2, 3) and for discharging this oil/water mixture into the barge; the water collecting near the bottom of the barge (2) is removed until the barge is mainly filled with oil; hereafter the filled barge is substituted by an empty one and the sweeping action may be continued.

Abstract: An anti-locking brake force regulating device for rail vehicles has a digital evaluation circuit which monitors the speed, acceleration and slip of at least one braked wheel and transmits braking instructions to a brake actuating element. The instructions include a rapid or slow increase or decrease of brake pressure or maintaining the brake pressure constant. In order to achieve a smooth control during a braking operation, the evaluation circuit is such that after instructing a rapid change of brake pressure in response to exceeding a predetermined threshold value a slow change of brake pressure in the same direction as the rapid change is instructed if the threshold value is again exceeded and the slow pressure change begins by a maintaining brake pressure constant phase. The slow or pulsed brake pressure change is preferably maintained for a fixed predetermined period of time.

Abstract: A device for handling a cored building block has a substantially U-shaped body portion which is inserted into the core of a building block such that the curved base and one end of a leg exert opposing forces on the wall of the core when an upward lifting force is applied to a handle attached to the other leg of the body portion and positioned substantially horizontally in the lifting position. A modification includes a U-shaped body portion, one leg of which is longer than the other and the legs are straddled over a wall separating cores of a building block to exert forces on the wall when an upward lifting force is applied to a handle attached to the curved base of the body portion.

Abstract: An anti-lock device for the brakes of vehicles, particularly rail vehicles, regulates the applied braking force. An evaluation circuit monitors the speed, acceleration and slip of at least one braked wheel and in response to the rotational behavior of the wheel generates instructions for the brake actuating element. The evaluation circuit maintains the brake pressure constant during the initial phase upon the first application of brakes until the wheel acceleration falls below a predetermined negative threshold value. The initial phase is terminated when the wheel acceleration falls below a further predetermined reference value which is lower than the first threshold value. Upon termination of the initial phase, the brake pressure is again varied in a manner as known in the art.

Abstract: A loudspeaker enclosure has a loudspeaker driver mounted on a surface of the enclosure such that the driver has an exposed front face to produce sound waves which are sought to be transmitted to a listening space exterior of the loudspeaker enclosure. A plurality of successive spaced limp or semi-limp non-porous pliable barriers are positioned in an opening between the interior and exterior spaces of the enclosure so as to relieve rear pressure of the loudspeaker driver while attenuating the rear sound waves and providing a damping effect on the loudspeaker driver.

Abstract: The firearm has a rigid frame comprising a pair of vertically spaced substantially parallel hollow rods which are interconnected at their respective front and rear ends by vertical crosspieces. A barrel is mounted between the hollow rods and at the end of the barrel in the vicinity of the rearward end of the frame is a breech assembly which is interconnected to both the upper and lower rods. A shoulder support is mounted on the rear ends of the rods and positioned symmetrically with respect to the barrel. The shoulder support and other components of the firearm such as the pistol grip, front stock, rear stock and sight means are each individually and independently adjustable on the frame so as to conform to the physical characteristics of an individual shooter.

Abstract: The device automatically adjusts the slack in the brake linkage of railway vehicle during the braking process and has two telescoping rod members one of which is connected with a brake motor and the other is connected to the brake linkage. A nut, nonrotateably mounted on the brake linkage rod member, is threaded upon a rotateable spindle shaft which is axially moveable a limited distance within the brake motor rod member and is connected to this rod member by a control clutch. When the control clutch is stressed by torque, the control clutch member will become disengaged from the brake motor rod member to permit a relative adjustment between the two rod members to overcome any slack. When slack is overcome, a rotary clutch between the threaded spindle and the brake motor rod member will be engaged so that braking force can be transmitted between the rod members.

Abstract: Diapositives are mounted in a strip formed by a pair of flexible sheet members each having at least two picture openings therein in side-by-side relationship and the sheet members are fastened to each other in face-to-face relationship mutually offset by a single picture opening. The frame is interposed between the sheet members and a diapositive is moveably positioned within an opening in the frame. The thickness of the frame is greater than that of the diapositive so that a diapositive is freely moveable within a frame opening and has play between the sheet members. An apparatus for projecting the strip mounted diapositives is provided with a pair of cassettes one of which contains a strip in which the diapositives are mounted and the second cassette contains a strip without any diapositives. The ends of the strips are automatically connected to each other for successively introducing the diapositives into the apparatus.

Abstract: An anti-lock device for vehicle brakes has a wheel generator which emits pulse-type signals whose frequency is proportional to the rotary speed of the wheel. A counter counts the pulses emitted during each of successive time intervals and these pulses are connected to a first memory which stores the count of the immediate preceding time interval and to a second memory which stores the count of the time interval next preceding the intermediate time interval. A logic circuit then produces a wheel speed value which is based on the wheel speed counts of the immediate preceding and next preceding time intervals.

Abstract: A clamp for multiple electrical cables has a band of a hard but resilient plastic material which encloses a number of electrical cables and the ends of the band are connected by a one-piece locking member. The ends of the band each have spaced lateral flanges thereon to define a transverse slot therebetween and the locking member is received within the slots such that when the ends of the band are drawn together end portions of the locking member are closely received under the flanges to secure the lamp tightly around the cables.

Abstract: A shoulder firearm, such as a sport rifle and the like, has a cheek-piece which is adjustable vertically and laterally with respect to the gunstock. Two spacer members are loosely positioned in correspondingly aligned bores or recesses in the cheek-piece and gunstock. Each spacer member has a plurality of pairs of opposed parallel surfaces and the distances between each pair of parallel surfaces are different. The spacer members may be in the form of blocks or cylindrical elements. By varying the placing of the spacer members in the recesses or bores of the cheek-piece and gunstock, the cheek-piece can be set at different heights.

Abstract: A writing medium unit for a writing or drawing machine comprises at least one writing unit head, a filling unit and a control unit. The filling unit is interconnected to the writing unit head and to the control unit by flexible writing medium supply tubes which are detachably connected to at least the filling unit.

Abstract: A torsional balancer device for a rotary shaft such as for a piston engine comprises a rotationally symmetrical member which is adapted to be connected to the rotary shaft to be balanced. A rotationally symmetrical seismic mass is rotatably mounted so as to be closely spaced from the rotational member and a viscous damping agent is within the small gaps between the seismic mass and the symmetrical member.A plurality, preferably an odd number, of curved, substantially closed spring elements have closely spaced ends which are connected respectively to the rotational member and the seismic mass. The spring elements define closed curves which may be circular or elliptical in shape. The rotationally symmetrical member may comprise a hermetically sealed annular housing and the seismic mass and damping agent may be enclosed within the housing.

Abstract: Diapositives are mounted in a strip formed by a pair of flexible sheet members each having at least two picture openings therein in side-by-side relationship and the sheet members are fastened to each other in face-to-face relationship mutually offset by a single picture opening. The frame is interposed between the sheet members and a diapositive is moveably positioned within an opening in the frame. The thickness of the frame is greater than that of the diapositive so that a diapositive is freely moveable within a frame opening and has play between the sheet members. An apparatus for projecting the strip mounted diapositives is provided with a pair of cassettes one of which contains a strip in which the diapositives are mounted and the second cassette contains a strip without any diapositives. The ends of the strips are automatically connected to each other for successively introducing the diapositives into the apparatus.

Abstract: An improved manhole structure is disclosed which comprises a cover having a rim inclined inwardly at 45.degree., on which a plurality of protrusions are provided; a ring for elevating the cover, having an upright inner wall and outer wall and an upper face and lower face, both inclined inwardly at 45.degree., on the said upper face a plurality of holes are formed for engagement with the protrusions formed on the cover, and on the said lower face a plurality of protrusions are formed; and a base having an upper surface inclined inwardly at 45.degree., and a flat lower face, on the said upper surface a plurality of holes are formed for engagement with the protrusions formed on the lower face of the said ring.

Abstract: An apparatus for stranding wire, cables, ropes or the like, has one or more rotatable supports and a plurality of receptacles are non-rotatably mounted on each of the supports. A bundle of wound wire which is to be stranded is contained in each one of the receptacles which are positioned so that the axis of each bundle of wire is substantially parallel to the axis of rotation of the support. The wires from each of the bundles in a receptacle are then guided to a stranding point.

Abstract: An agricultural implement, particularly a pick-up wagon, comprises a pick-up member for picking up crop lying on the ground, an advance mechanism located behind the pick-up member, viewed in the intended direction of displacement of the crop and stationary cutters arranged behind the advance mechanism, between which stationary cutters the crop can be passed on with the aid of the advance mechanism, whereby the advance mechanism comprises a plurality of additional cutters adapted to rotate about a rotary axis during operation so that these rotating cutters displace the crop in the direction towards the stationary cutters and fingers adapted to reciprocate during operation and pushing the crop also in the direction towards the stationary cutters during operation, the arrangement being such that the rotating cutters move in between the reciprocating fingers.