Abstract: A pushbutton assembly for a switch includes a cylindrical housing having an axial bore therethrough, one end of the housing being enlarged to define a cup-shaped cavity communicating with the bore. An elongated tubular actuator body is reciprocally movable in the bore. At one end of the body and received in the cavity is an inverted cup-shaped head having an end wall and a cylindrical side wall. The other end of the body is bifurcated to define flexible legs. An annular recess in the body adjacent to the upper ends of the legs receives an annular projection on the body for limiting axial movement of the actuator. Unitary with the head are three elongated flexible resilient bias members engageable with the housing for resiliently biasing the actuator to a normal rest position. Two embodiments are disclosed, one in which the bias members are intergral with the head side wall and another in which the bias members are integral with the head end wall.

Abstract: A modular photographic flash system includes a plurality of housings, some possibly empty and some containing flash units, interconnected to form a desired flash unit array. Each housing includes a hollow cylindrical member substantially square in transverse cross-sectional outline with two adjacent walls having dovetail tongues thereon and the other two walls having dovetail grooves to accommodate interfitting of adjacent housings. A latch member is movable into and out of each dovetail groove for engagement in an associated slot in the tongue interfitted therewith, the latch being operated by a spring-biased actuator rod carried in a channel formed in the inner surface of the housing.

Abstract: An apparatus for simultaneously removing and in situ severing of rails from a rail bed to produce a plurality of rail sections of predetermined lengths including a sled frame defining a rail channel with an anvil mounted on the sled frame across the rail channel at the rear thereof. A hammer is mounted on the sled frame above the rail channel spaced from the anvil and moves along a ram path extending from a level above the rail channel to a level below the rail channel. Control mechanism is associated with the hammer for actuating the ram to travel along the ram path to contact a rail and force same against the anvil to cause the rail to fracture. In another embodiment a hammer and blade are carried by a member pivotally mounted on the sled frame sequentially to score the rail and then to sever same.

Abstract: A system for dialyzing blood in which blood is passed through an exchange station to transfer toxic material across a semipermeable membrane to a dialyzate. Pump means are disclosed for simultaneously pumping a plurality of liquids through the system at different flow rates. The pump means is provided with mechanism for stopping the flow of dialyzate while retaining the blood pumping capability.

Abstract: The probe includes a tubular housing having a first portion and a second portion. The first portion is adapted to be mounted in place of the glow plug of a selected engine cylinder. A light pipe within the first portion directs light from the combustion zone to a phototransistor within the second portion. The front of the first portion has a reduced size aperture defined by an internal shoulder against which the front of the light pipe is seated. The rear of the first portion carries resilient sealing means which is deformed when the second portion is telescoped thereon so as to provide a detachable, frictional, light-tight thermally insulated connection therebetween. A phototransistor is mounted within the second portion to convert light passing through the light pipe into electrical signals. A cable carries these electrical signals to processing equipment. A base resistor is located in the second portion between the base of the phototransistor and the cable.

Abstract: A railway car for transporting pulverulent lading includes a fluid-tight container, slope sheets mounted within the container defining two troughs leading to a sump in the lower portion of the container, two aligned permeable conveyors in the bottom of each trough, an apparatus for alternately aerating each permeable conveyor in each trough for fluidizing the lading to facilitate movement thereof into the sump. Discharge valve structure is provided below the sump for pneumatically unloading the container pipe for pressurizing the space between the slope sheets and the container, and a pipe interconnecting the top of the container and the discharge valve structure for conveying air from within the container to the discharge valve structure during unloading of the container, are also provided.

Abstract: A method of treating lice infestations in patients in need of such treatment and composition useful therefor is disclosed and includes topically applying to the lice-infected area an effective amount of one or more of the pediculocide agents selected from the class consisting of the acid salts of demecarium, echothiopate, edrophonium, neostigmine, pyridostigmine and ambenonium; and isoflurophate; and for a time of at least about 3 to 5 minutes to interrupt the breeding cycle of the lice.

Abstract: The rollover switch apparatus includes a one-piece plastic base, a switch attached thereto and a one-piece plastic actuator having an arm pivotally attached to the base and means engaged by the rolling pinball to move the actuator from its rest position to an actuating position.

Abstract: A target member in a drop target assembly of a pinball game has a cam surface formed on the rear surface thereof and adapted for camming engagement with the assembly frame when the target member is deflected by a pinball and unlatched from its raised condition for positively driving the target member downwardly to prevent its rebound to its latched condition.

Abstract: A pinball game includes plural parallel columns of kickers, each kicker being responsive to ball impact thereon for propelling the ball therefrom in a predetermined direction. Each kicker is rotatable for varying the predetermined direction and the kickers in each column are ganged together for manual simultaneous rotation thereof. Different types of kickers may be provided in different columns.

Abstract: A pin ball game includes a ball receptacle which has associated therewith a rotary oscillating shooter for propelling the ball from the receptacle and along the playfield board in the direction of a predetermined axis which oscillates with the shooter. When the ball drops into the receptacle it actuates a drive motor for oscillating the shooter and enables a manually-operated trigger switch. When the shooter axis is pointing in the desired direction, the user manually operates the trigger switch to actuate the shooter, which in turn operates to stop the shooter oscillation and disable the trigger switch.

Abstract: The mounting structure includes a pair of side abutments, upper and lower abutments, and front and rear abutments into which a rectangular parallelepiped body of a leaf spring switch is snap fit.

Abstract: The receiver comprises a processor circuit which receives and processes a modulated carrier wave. The modulation is a code consisting of a single tone or a sequence of tones, followed by intelligence signals. The processor circuit separates the code and the intelligence signals from the carrier wave. The receiver also comprises a decoder circuit responsive to a given code to provide an enabling signal. An audio circuit is rendered operative by the enabling signal so that it can process the ensuing intelligence signals. The receiver has a push-button switch which can be actuated at any time to monitor the channel. Such switch is associated with a timer and an electronic switch.A first optional connection may be made internally in the receiver, whereby actuations of the push-button switch places the receiver in a monitor mode so that it will be continuously on. Subsequent actuation of the switch will cause the receiver to revert to its tone-squelch mode.