Abstract: An electrical device to compensate for crystal oscillator frequency shifts occurring over a temperature range includes a voltage divider for generating a temperature variable, compensation voltage at an output. The output of the voltage divider is to be electrically coupled to the oscillator so that the compensation voltage compensates for the crystal oscillator frequency shifts otherwise occurring over the temperature range. A voltage source is to be coupled to an input of the voltage divider for inputting a generally fixed voltage during normal crystal oscillator operation, and providing for multiple and repeatable adjustments to the fixed voltage before beginning the normal crystal oscillator operation.

Abstract: A juice extracting device for rupturing the exposed cellular structure of a section of fruit such as oranges, grapefruit, lemons, et al. comprising an upstanding reamer with a bulbous head. The bulbous head portion takes a generally spherical configuration and with the spherical surface extending downwardly and inwardly beyond an imaginary diametrical horizontal plane. Thus, a downwardly diminishing horizontal cross section is provided beneath the plane with speed and efficiency of juice extraction greatly enhanced.

Abstract: Apparatus and method for inhibiting the accumulation of bacteria within a humidifier includes a primary water path for directing water directly from a water source to a humidifier during its operation. When the humidifier is shut-down for a cleaning operation, water is directed through a bacteria-removing device before entering the humidifier. Water contact surfaces within the humidifier are preferably lined with copper to further inhibit bacterial growth.

Abstract: A fire retardant window construction for a fire door comprises a trim strip having inner and outer members. The inner member is of a high density incombustible mineral material or ceramic and is nailed in position to securely and uniformly hold the pane of glass in the door opening. The outer trim member is of a fire retardant particle board and has an exposed wood veneer facing throughout. An intumescent caulking compound is applied between an inner portion of the outer trim member and the pane of glass.

Abstract: A conversion unit is provided which permits the conversion of a portable hand-held appliance, such as a mixer having a pair of beaters, to a stationary drink mixer having a single depending stirring shaft. The conversion unit includes a power unit receptacle that securely supports the portable appliance power unit in a manner which permits the driving engagement of the stirring shaft by a power take-off of the portable appliance power unit. Stabilizing fingers in the power unit receptacle additionally engage the power unit to provide enhanced stability. Storage for the pair of mixer beaters may be provided at the rear of the unit when the portable appliance is an electric mixer so that all components of the convertible mixer combination are maintained within a single integrated unit.

Abstract: The combined multi-purpose kitchen appliance includes a bracket unit for attachment beneath a kitchen cabinet and an appliance assembly which is pivotally mounted within the bracket unit to permit movement of electric kitchen appliances mounted on opposite sides of the appliance assembly into use positions. The appliance assembly is a unitary assembly which may be inserted or removed from the bracket unit without the use of additional mounting components, and the appliance assembly is designed to enhance the rigidity of the bracket unit when the appliance assembly is in a use position.

Abstract: A splatter shield (42) is positioned on a frontwall (34) of a hollow upright standard (14) of an electric drink mixer (10). The splatter shield includes a one-piece body (44) having a top flange (60) bent to form a rear flange (68) which engages an inner surface (38) of the hollow standard frontwall to cooperate with a mounting bolt (46) extending through an aperture (48) in the body into engagement with the frontwall to mount the splatter shield on the standard. A switch actuator mechanism (30) for activating a drink mixer motor (18) via a switch assembly (36) extends through a slot (32) defined in the frontwall and a slot (58) in the body to be contacted by a container (24) supported on a container support (54) which is also one-piece with the body.

Abstract: A tractor-drawn levee plow having a telescoping frame pivotally supporting a pair of harrow-gangs arranged to move soil laterally toward each other to a center-line to form the levee, the frame also pivotally supporting a pair of hydraulic cylinders powered by the tractor and connected in fluid-power series, one each of which is pivotally connected to the outer end portion of one of the gangs and each of which is utilized in practicing a new method involving forcibly holding the outer portion of its gang in elevated and/or depressed relation to its inner end portion while in ground-engaging position to thereby most effectively and efficiently construct a levee.

Abstract: An air conditioning control system for at least two duct sections each with an associated damper comprises at least one master controller for a first pneumatic actuator for one damper and at least one tracking controller for a second pneumatic actuator for the other damper. The master controller comprises a first flow sensor producing a first flow variable signal in response to a sensed flow in the duct section associated with the said one damper. An adjustable reference or bias signal means is provided and a temperature signal is combined therewith to provide a composite signal for comparison with the flow variable signal. A resultant signal after comparison operates the first pneuamtic actuator for the said one damper. A tracking controller comprises a second flow sensor producing a second flow variable signal in response to sensed flow in the duct section associated with the other damper.

Abstract: A one-piece shank assembly is disclosed which is comprised of a flat leaf spring having an arcuate intermediate portion, a lower end portion adapted to mount a ground working tool, and an upper end portion which is reversed upon itself to thereby form a pivot sleeve at the forward end of the shank. The leaf spring is brought rearwardly in contiguous and overlying relation to the intermediate portion and its terminal portion is then again reversed upon itself upwardly, forwardly, and then downwardly to form a sleeve bearing for the lower end of a pressure rod. Also disclosed is a simplified mounting assembly for the shank comprised of a pair of rearwardly facing and pivotally connected U-shaped channel members, portions of which are cut away to receive and clamp the frame bar of a ground-working machine in an effective and efficient manner.

Abstract: A narrow-base terracing plow comprising a tractor-borne transverse frame supporting a pair of transversely spaced rearwardly and outwardly extending gangs of inwardly directed disc harrows, each gang being pivotally mounted on a mounting bracket for vertical swinging movement relative thereto and the mounting bracket being mounted on said frame for swinging movement about a vertical axis, each gang having a rigid link pivotally connected thereto and to the frame and having a hydraulic cylinder extending between its mounting bracket and the medial portions of the gang by means of which the outer end portion of the gang can be forced downwardly into the soil to a greater extent than its innermore portions, thereby causing the soil through which it passes to be moved laterally toward the centerline until a terrace is formed between the gangs and peaks thereat.

Abstract: The drink mixer (10) includes a standard (12), base (14) and motor housing (16) formed to provide an integral, unitary wall structure adjacent a stirrer arm (18). The front of the standard and top of the base are protected by a removable splatter shield (22) which is properly positioned by a locator pin (118) formed on the standard (12). The splatter shield (22) is held in place by a cup support assembly (24) and a switch actuator assembly (26). This switch actuator assembly (26) operates a power switch assembly (58) including a flat slide plate (74) which shields a normally closed microswitch (96). The lower edge of the slide plate (74) contacts a switch actuating arm (100) to depress the microswitch button (98) when the slide plate is in an "off" position. The slide plate (74) moves away from the switch actuating arm (100) to release the switch button (98) and actuate the mixer ( 10).