Abstract: An apparatus for removing solids from a liquid/solid mixture disposed in a tank and rising to a mixture level, the apparatus including a suction assembly defining a suction opening, the suction assembly linked to a vacuum that causes suction at the opening, a support assembly formed about the suction surface including first and second essentially circular housing walls having wall edges and a filter belt loop sealed to the edges and sized such that the belt is slack and subject to deformation between the edges, a belt section disposed to cover the suction opening and a processor controlling a motivator to periodically alter belt position with respect to the suction opening.

Abstract: A volumetric feed hopper is provided with a variable speed drive to vary the feed rate of the hopper. The hopper is further provided with adjustable legs with pivoting feet to enable the hopper to be installed a various heights and on uneven surfaces.

Abstract: A tipping pit water reclaiming system for concrete reclaimers which includes one or more tanks with a pivot support and hydraulic pistons for tipping the tanks to remove the settled solids. Clarified water from the tipping tanks overflows into a pump tank where it is returned by pump to the reclaimer. The pump tank includes a second pump for pumping excess clarified water into a storage tank for return to the tipping tank after the cement solids have been emptied out of the tipping tank. The second pump prevents the overflowing of water onto the ground from the tipping tank or pump tank as solids accumulate in the tipping tank. The second pump is controlled by float activated switches positioned at predetermined levels within the pump tank.

Abstract: A volumetric feed hopper is provided with a variable speed drive to vary the feed rate of the hopper. The hopper is further provided with adjustable legs with pivoting feet to enable the hopper to be installed a various heights and on uneven surfaces.

Abstract: A tipping pit water reclaiming system for concrete reclaimers which includes one or more tanks with a pivot support and hydraulic pistons for tipping the tanks to remove the settled solids. Clarified water from the tipping tanks overflows into a pump tank where it is returned by pump to the reclaimer. The pump tank includes a second pump for pumping excess clarified water into a storage tank for return to the tipping tank after the cement solids have been emptied out of the tipping tank. The second pump prevents the overflowing of water onto the ground from the tipping tank or pump tank as solids accumulate in the tipping tank. The second pump is controlled by float activated switches positioned at predetermined levels within the pump tank.

Abstract: An automatic water shutoff system for filling water tanks on concrete mixer trucks, including a nozzle assembly attached to a water hose. The nozzle assembly includes a first elongated tube surrounded by a second shorter tube. A flange closes the proximal end of the second tube and forms an air chamber between the first and second tubes. The end of the first tube closest to the flange forms a water inlet nipple. An air pressure sensing tap is formed by a small tube passing through the flange. One end of the tap communicates with the air chamber and a second end of the tap is attachable to an air pressure sensing tube, operatively coupled to a pressure switch. When pressure in the air chamber reaches a predetermined, water tank full level, the pressure switch causes the pump or valve to turn off the flow of water into the tank.

Abstract: An apparatus for removing solids from a liquid/solid mixture disposed in a tank and rising to a mixture level, the apparatus including a suction assembly defining a suction opening, the suction assembly linked to a vacuum that causes suction at the opening, a support assembly formed about the suction surface including first and second essentially circular housing walls having wall edges and a filter belt loop sealed to the edges and sized such that the belt is slack and subject to deformation between the edges, a belt section disposed to cover the suction opening and a processor controlling a motivator to periodically alter belt position with respect to the suction opening.

Abstract: An apparatus for removing solids from a liquid/solid mixture disposed in a tank and rising to a mixture level, the apparatus including a suction assembly defining a suction opening, the suction assembly linked to a vacuum that causes suction at the opening, a support assembly formed about the suction surface including first and second essentially circular housing walls having wall edges and a filter belt loop sealed to the edges and sized such that the belt is slack and subject to deformation between the edges, a belt section disposed to cover the suction opening and a processor controlling a motivator to periodically alter belt position with respect to the suction opening.

Abstract: Filtering apparatus employs both pneumatic controls and a pneumatic drive to eliminate all electrical components. The filtering apparatus includes a perforate plate and a tank with a strip of filtering media supported on the plate. Contaminated liquid is supplied from above and clean liquid is removed from below the filtering media and plate. The filtering media is advanced across the plate by conveying apparatus. The pneumatic drive for the conveying apparatus is operated by pneumatic controls and a float which actuates the drive when the liquid in the tank rises to a predetermined level as the filtering media becomes plugged. The drive is shut off when the liquid drops to a lower predetermined level.

Abstract: A filtering system includes a filter drum assembly. The system includes a filter tank with a conveyor in the bottom which removes contaminants from liquid in the tank. The filter tank also has supports therein by means of which the filter drum assembly is removably supported in the tank and can be removed as a single assembly. The filter drum assembly includes a filtering drum located in the tank and supported by a suction pipe connected by a separable fitting to a suction pump. A drive shaft is vertically positioned above the drum and is rotatably supported by an end wall of the drum. The shaft drives a wiper arm having a wiper blade in contact with the filtering drum wall and the blade is periodically moved around the drum wall to clean filter cake therefrom. The wiper arm is driven by a one-way clutch, an arm, and a fluid-operated ram which is also supported by the suction pipe.

Abstract: A fluid-operated, time delay control and system embodying same are set forth. The time delay control includes an accumulator chamber communicating with a source of fluid under negative pressure or vacuum and a second chamber having a partition dividing it into two parts, a first of which communicates with the accumulator chamber. The second part communicates with a vacuum-sensitive switch which is energized when sensing a vacuum of a predetermined value. The partition has a check valve for maintaining the vacuum switch in communication with a vacuum after the vacuum is released at the source and the pressure rises in the first part of the second chamber. An adjustable flow control valve in the partition slowly releases the vacuum which the switch senses. The switch then reverts to a de-energized condition when a predetermined value is reached. A filtering system incorporates the time delay control with the control controlling a vacuum break valve and a motor for moving a strip of filter media.

Abstract: A drum with a wedge-wire filter screen is submerged in a dirty coolant tank and filters machine tool coolant when vacuum is applied to the inside of the drum by means of a suction line at one end of the drum. The vacuum draws the coolant through the screen and into the inside of the drum for discharge through the suction line. During the filtering process, a filter cake builds up on the outside of the screen and must be periodically removed therefrom. To remove the filter cake while enabling the use of a simplified sealing structure between the drum and the suction line, the drum is supported in a rotationally stationary position, a scraper is supported to rotate around the drum, and the scraper is intermittently indexed to shave filter cake from the screen.

Abstract: The disclosure concerns an apparatus for separating various sizes, shapes, and textures of solid particles from a liquid, comprising: a settling tank having an elongated ramp at one end with a scraper flight conveyor, driven at the upper end of the ramp, to scrape settlings from the bottom of the tank up the ramp out of the tank; and at least one cylindrical rotatable filter drum assembly snapped between spaced rigid guide and supporting brackets in the tank. An axial end of the filter drum has a ball duct seating in a socket duct connected to the intake of a continuously-operating pump for circulating filtered liquid to the machine tools with a bypass into a clean tank that overflows into the settling tank. The other end of the filter drum assembly is axially outwardly resiliently pressed, such as by a spring against an opposite wall of the tank, to urge the ball and socket joint together.

Abstract: A security system is disclosed which utilizes plural remote terminals for controlling access at plural locations throughout a secured area or building. Each of these remote terminals is capable of independent functioning, and includes a memory for storing plural independent identification numbers which define the personnel who will be granted access. These numbers stored in the terminal memories may be different from terminal to terminal, or may be uniform throughout the system, and may be the same as a list stored at a central processing location. Thus, access may be limited to the same group of individuals regardless of whether it is provided by a central memory list or a remote memory list. The remote memories provide total memory flexibility, so that the deletion of identification numbers from the list does not reduce the memory size.

Abstract: A security system is disclosed which utilizes plural remote terminals for controlling access at plural locations throughout a secured area or building. Each of these remote terminals is capable of independent functioning, and includes a memory for storing plural independent identification numbers which define the personnel who will be granted access. These numbers stored in the terminal memories may be different from terminal to terminal, or may be uniform throughout the system, and may be the same as a list stored at a central processing location. Thus, access may be limited to the same group of individuals regardless of whether it is provided by a central memory list or a remote memory list. The remote memories provide total memory flexibility, so that the deletion of identification numbers from the list does not reduce the memory size.

Abstract: A security system in which access at remote locations is limited to personnel inserting in the system a coded data card, the data of which compares favorably with data stored in a memory. The memory data comprises a table which permits access to selected terminals by selected personnel at selected times. Programming access to the system for the purpose of altering data in the access authorization table is limited to individuals who insert a supervisor's card into the system, which card enables the logic required for altering the authorization table.

Abstract: The disclosure concerns an apparatus for separating various sizes, shapes, and textures of solid particles from a liquid, comprising: a settling tank having an elongated ramp at one end with a scraper flight conveyor, driven at the upper end of the ramp, to scrape settlings from the bottom of the tank up the ramp out of the tank; and at least one cylindrical rotatable filter drum assembly snapped between spaced rigid guide and supporting brackets in the tank. An axial end of the filter drum has a ball duct seating in a socket duct connected to the intake of a continuously-operating pump for circulating filtered liquid to the machine tools with a bypass into a clean tank that overflows into the settling tank. The other end of the filter drum assembly is axially outwardly resiliently pressed, such as by a spring against an opposite wall of the tank, to urge the ball and socket joint together.

Abstract: A security system is disclosed which utilizes plural remote terminals for controlling access at plural locations throughout a secured area or building. Each of these remote terminals is capable of independent functioning, and includes a memory for storing plural independent identification numbers which define the personnel who will be granted access. These numbers stored in the terminal memories may be different from terminal to terminal, or may be uniform throughout the system, and may be the same as a list stored at a central processing location. Thus, access may be limited to the same group of individuals regardless of whether it is provided by a central memory list or a remote memory list. The remote memories provide total memory flexibility, so that the deletion of identification numbers from the list does not reduce the memory size.