Abstract: A temperature sensing system for controlling the temperature of fill water in an automatic washer having an inlet hot water valve and an inlet cold water valve. The inlet hot water valve is continuously open during fill and the inlet cold water valve is normally closed during fill. A first predetermined temperature level of the incoming hot water is sensed and also a second predetermined level of incoming hot water is sensed, the second temperature level being lower than the first temperature level. A switch is provided to bypass the sensing of the second predetermined temperature level of the incoming hot water. This switch allows the user of the clothes washer to preselect either of two water temperature levels desired. When both the inlet hot water temperature is above the first temperature level and the sensing of the second temperature level is bypassed, the cold water valve is opened by a control.

Abstract: A sand cooler control system for a sand casting foundry system incorporates a cooling system positioned downstream of the shakeout station where castings are separated from the hot sand. The amount of cooling fluid utilized in the cooling process is controlled by a digital system responsive to the total heat (BTU) content of the sand as determined by a combined function of sand temperature and volume. The temperature and volume parameters are determined by non-contact sensors which take the form of an infrared sensor and sonic sensor, respectively.

Abstract: A novel coin operated ultrasonic device for cleaning jewelry and other small household items is described. The device is designed for usage in public places and has a cleaning chamber, a cover for the chamber and a basket. When not in use, the cover remains in a locked position by an electromagnetic latch which is responsive to coin actuated circuitry. Upon insertion of a coin, power is supplied to the device for a given period of time. The power supplied causes the electromagnetic latch to become activated thereby permitting the cover to be opened. A hook is attached to the underside of the cover and is designed to suspend a workpiece such as a ring, necklace or bracelet in a cleaning solution disposed in the cleaning chamber while the cover is closed. A porous basket is situated within the chamber to insure that the workpiece is retrievable from the cleaning liquid in the event it should become disengaged from the hook.

Abstract: A sand cooler control system for a sand casting foundry system incorporates a cooling system positioned downstream of the shakeout station where castings are separated from the hot sand. The amount of cooling fluid utilized in the cooling process is controlled by a digital system responsive to the total heat (BTU) content of the sand as determined by a combined function of sand temperature and volume. The temperature and volume parameters are determined by non-contact sensors which take the form of an infrared sensor and sonic sensor, respectively.

Abstract: A truck trailer interior washing system with a washing head mounted on an extendable and retractable boom horizontally mounted for automated washing cycle extension into and back out of the trailer interior. A truck body or trailer is backed into exact position, centered and aligned with the boom, with the use of guide rails and a centering plate structure automatically moving trailer wheels laterally in a centering action as required. When the system is activated, a pump is started to deliver hot detergent solution to the nozzled cleaning head from wash fluid back-up tanks and heaters as the extension boom is moved into the trailer at a predetermined rate (50' per minute, for example). A feeler bar and microswitch system senses when the inside nose of the trailer is reached and acts to stop the boom in the extended position for a short interval of time during which the pump and feed mechanism clears itself of detergent solution with microswitch activated clear hot water flush to the nozzles.

Abstract: A first inductive coil in the form of a bifilar winding is wound on a ferrite ring core with the two sections of the bifilar winding connected in series, the junction of the two sections forming the center tap of the coil. A capacitor is connected across the first coil to form a parallel resonant circuit therewith. The two ends of the first coil are respectively connected to a predetermined capacitance and to an electrode adapted to form a capacitative element whose dielectric includes a fluid under test. The center tap of the first coil is connected to the output of an amplifier whose input is connected to a second, detector coil comprising a separate winding on the ferrite ring core located substantially at the mid-point between the ends of the bifilar winding. The second coil is arranged to be inductively coupled to said first coil such that the mutual inductance between the first coil and the detector coil completes a feedback loop for the amplifier.

Abstract: A cooling device for liquid cooling of thermoplastics extrusions in an enclosed calibrating chamber comprises a plurality of liquid jets for spraying liquid into the calibrating chamber, a liquid receptacle for positioning beneath the calibrating chamber for receiving liquid sprayed into the calibrating chamber by the liquid jets, a pump for supplying liquid from the liquid receptacle to the liquid jets and monitoring devices for controlling the pump to maintain a liquid level selectively within the liquid receptacle or above the level of the liquid jets in the calibrating chamber. The invention also includes a calibrating device for calibrating thermoplastics extrusions and incorporating a cooling device as above mentioned.

Abstract: The environment of the invention comprises work degreasing apparatus wherein a tank contains liquid solvent to be vaporized by a heater for degreasing contact with work introduced into the tank, the vapor being subject to condensation, there also being a tank cover having open and closed positions. The inventive improvement comprises means responsive to closing of the cover to control the heater to reduce heat transfer to the liquid solvent, and also responsive to opening of the cover to control the heater to increase heat transfer to the liquid solvent.

Abstract: Apparatus for cleaning the heat exchanging surfaces of the heat transfer plates of rotary regenerative heat exchangers by using a row of high pressure directional jets of cleaning fluid directed into the interspaces between the plates and hitting deposits positioned in the interspaces essentially in the shape of a moving row of impact points.

Abstract: Fibers enter a textile mill at bale breaking equipment where fibers are distributed onto an open conveyor, and possibly blended, for transmittal to processing machinery such as opening and cleaning equipment, picker equipment for forming a lap, carding equipment, and drawing, roving and spinning equipment. The fibers are carried on the open conveyor past a spray station including at least one nozzle for spraying a finely diffused liquid onto the surface of the fiber material carried on the conveyor. The liquid is an aqueous solution which consists of about 75% water and about 121/2% of animal or vegetable fats as an active compound which is converted ionic salt by reaction of the organic acids contained in the animal and vegetable fats with an amine and subsequently with an alkyl sulfate. After passing the spray station, the fiber material may be transmitted through pneumatic conveyor systems to the additional processing equipment which ultimately converts the fibers into yarn or thread.

Abstract: This invention relates to a device for regulating the water level in apparatus for treating an insulated electrical conductor, which device comprises two or more gates actuated by a control signal for filling and emptying the apparatus, a first control circuit having a broad range of adjustment, a second control circuit having a narrow range of adjustment, and an inverter, each circuit in turn comprising a first transmitter for producing a measuring signal, a second transmitter for transmitting a reference signal, and a comparator for producing a control signal and transmitting same to the inverter, the inverter supplying the control signal from the comparator of the first or of the second circuit to the gates.

Abstract: A system and the required apparatus to provide a continuous recovery for the material being etched including the system and apparatus for recycling the etchant material for reuse in the etching device. The system includes a device for etching, an ammoniating system for the constant restoration of the etchant to a proper pH level for efficient alkaline etching and a controlled system for the systematic removal of the material which is etched and is in solution within the etchant, which controlled system includes the regeneration of the etchant material.

Abstract: An arrangement for cooling hot rolled steel bands reeled into coils, according to which the rolling hot steel band after having been rolled into coils are cooled in a liquid bath.

Abstract: A system for cleaning and disinfecting medical parts which include a drum rotatable about a horizontal axis where the drum includes an interior enclosable chamber for receiving small parts and circumferential retaining members for receiving and retaining tubular members about the horizontal axis. A timing device sequentially control the operation upon filling by washing, draining, rinsing and drying in sequence and structure is provided to accomplish these functions.

Abstract: In a metal surface treatment apparatus in which a work article is immersed successively in a plurality of treatment tanks disposed in a line and containing respective treatment liquors, a traveling crane handling the work article in this operation is automatically controlled to travel over the tanks with a repeated horizontal speed pattern comprising an initial period of steady acceleration from the center of each tank, a period of high speed, and a period of deceleration upon approaching the center of the succeeding tank, at which the crane is stopped, and is automatically controlled to lower and raise the work article at the center of each tank with a vertical speed pattern comprising, in sequence, an initial period of descent at low speed, a period of high speed, a period of low speed as the lower end of the article approaches and enters the surface of the treatment liquor in the tank, a period of high speed, a period of low speed as the article approaches the lower limit of its descent, an initial period

Abstract: An apparatus for determining the quantitative presence of ions derived from solids, liquids, gases or similar items in which a deionized liquid dissolves the ions from the items, the liquid then is evaluated for conductivity by virtue of the presence of the ions, the liquid is then passed through a deionizer to substantially remove the ions, and again the liquid is re-exposed to the partially cleansed item; the cycle is continued until conductivity indicates that a predetermined degree of deionization has been achieved.

Abstract: System and apparatus for the controlled etching of copper work pieces with ferric chloride etchants. The working solution is constantly monitored with regard to its oxidation reduction potential (ORP) by comparison with a standard solution or voltage. To reduce the build up of etched copper in the working solution, an ORP controller activates the removal of specific quantities of that solution which are then replaced in precise stoichiometric proportions with fresh etchant. Simultaneously, oxidant is injected into the fluid to reoxidize ferrous ions to ferric ions. The solution is constantly monitored and the ORP control means repeats the above procedure as often as necessary to maintain the ORP of the fluid within an acceptable range.

Abstract: An apparatus for effecting a counterflow liquid treatment of workpieces and particularly an aqueous rinsing of workpieces during an electrochemical treating sequence, such as, for example, an electroplating cycle or the like. The workpieces are subjected to a sequentially-phased treatment with a plurality of solutions while disposed at a treating station, and the individual treating liquids are collected and returned to their respective reservoirs, and the individual reservoirs are counterflowed in a direction opposite to the order of application of liquids to the workpieces.

Abstract: A tray washing system includes conveyors which transport compartmented food service trays from a tray receiving mechanism to inverting and scrapping mechanisms and through washing, rinsing and drying mechanisms to a stacking mechanism. The receiving mechanism restricts trays to insertion in a predetermined orientation in which the food receiving surfaces face upwardly, and the inverting mechanism inverts each tray so that the food receiving surface faces downwardly. As each tray is inverted, the scrapping mechanism discharges substantially the entire contents of a cleaning fluid reservoir onto the food receiving surface of the tray, and thereby dislodges refuse and silverware that may be on the tray. The washing, rinsing and drying mechanism apply a water-detergent solution, rinse water, and drying air to the trays, respectively, and the stacking mechanism deposits the trays onto a mobile self-depressing tray receiver.