Abstract: An adjustable bimetal snap disc thermostat is disclosed which is provided with a disc seat having an elongated projection formed of deformable material, such as copper. Heat is conducted along the projection between the disc and a location remote from the thermostat so that the temperature of the disc is responsive, at least in part, to the temperature at such remote location.

Abstract: A gas diffuser screen surrounding a pilot burner and with one of the perforated walls of the screen slanted outwardly at an angle approximately forty-five degrees from the vertical and overlying an electrode spark igniter to ignite the gas supplied to the burner. The slanted wall forms a pocket of gas beneath the wall thereby permitting greater latitutde in placement in any direction of the electrode igniter outside the screen with respect to the pilot burner without adversely affecting the spark ignition of the gas supplied to the pilot burner.

Abstract: Carton feeding and erecting apparatus for transferring flattened cartons from one location to another while simultaneously unfolding the cartons to an erect, or partially erect, condition. The apparatus is particularly useful in high speed packaging operations such as operations wherein thermoplastic coated paperboard cartons are to be sequentially unfolded or erected from a flattened condition, closed and sealed at their bottom ends, filled with milk or other contents, and closed and sealed at their top ends. The apparatus includes a carton receiving station at one location, a carton delivery station at another location, carton carrying means operable to engage a flattened carton at the receiving station and carry the carton to the delivery station, and carton unfolding means operatively associated with the carrying means and operable to unfold a carton to its erect condition as the carton is carried by the carrying means from the receiving station to the delivery station.

Abstract: In the preparation of high molecular weight polyamides, vaporization of the organic diamine employed results in its loss. The effect of the loss can be reduced by collecting the vapor given off during the evaporation and/or polymerization steps, condensing it, passing the condensate through a selected ion-exchange resin, and obtaining the diamine by contacting the resin with either a strong inorganic acid or an aqueous solution of an organic dicarboxylic acid used in making high molecular weight polyamides depending upon the resin employed. When the diacid is used, the salt so obtained can be used in preparing high molecular weight polyamides.

Abstract: An acoustic power system includes a speaker which generates acoustic energy in response to electrical driving signals. Electrical representations of the acoustic energy generated by the speaker are effectively subtracted from electrical input signals having a preselected frequency response to produce electrical error signals. The error signals are amplified to produce the electrical driving signals which operate the speaker. In the preferred embodiment, the electrical representations of the acoustic energy generated by the speaker are produced by detecting a portion of the impedance produced across the speaker voice coil.

Abstract: In combination with a washing machine of the type including a cylindrical drum mounted for rotation about the axis thereof and having a washing fluid inlet and a washing fluid outlet, a recirculating pump having an inlet and an outlet, a recirculating suction line extending from the washing machine outlet to the pump inlet, and a supply tank having an outlet, and a main inlet line extending from the pump outlet to the washing machine inlet, the supply tank outlet being connected to the suction line such that flow to the pump inlet from the washing machine will cause chemicals from the supply tank to be drawn into the pump and be mixed with flow from the pump to the main inlet line.

Abstract: A smoke detector and alarm utilizing two photo resistors, one of which is used to detect smoke in an enclosed chamber and the other of which is used to compensate for line voltage variations and the effect of such variations on the smoke detecting photo resistor, and to supervise or monitor the light source so as to detect and signal light source failure in a distinct way.

Abstract: A can structure suitable for packaging beer or the like includes an indicator formed integral with one end wall. The indicator provides visual, tactile and audible indication of the quality of the product in the can. Various specific indicator structures are disclosed.

Abstract: Polymeric replica molds formed from certain specific polymeric compositions are disclosed. The polymeric compositions impart properties to the replica molds which allow the casting of high-quality plastic optical components such as ophthalmic lenses.Among the polymeric compositions which have been found useful are: (1) cross-linked polymethyl methacrylate; (2) a copolymer of 99-20 parts methyl methacrylate and 1-80 parts acrylonitrile, preferably but not necessarily cross-linked; (3) cross-linked polystyrene; (4) a cross-linked copolymer of 90-10 parts styrene and 10-90 parts acrylonitrile; and, (5) a cross-linked copolymer of 90-10 parts styrene and 10-90 parts methyl methacrylate.Replication processes including the steps of forming the polymeric replica molds described herein and subsequently using them in the casting of plastic lenses from materials such as polymerized allyl diglycol carbonate are also disclosed.

Abstract: A power driven typewriter comprising a shiftable carrier supporting a rotatable and axially movable flexible type drum having a plurality of circumferentially extending rows of type characters thereon. Type keys, when depressed, each condition one each of two groups of actuators and cause operation of a power driven cyclically operable clutch which drives a power bail to operate the two conditioned actuators, one of which is effective to rotate the type drum from any position it may be in to a new position and the other actuator being effective to raise or lower the type drum from any position it may be in to a new position to thus align a type character corresponding to the key depressed at the printing position. Upon alignment of a selected type character, the type drum is flexed radially to cause an imprint. Means are provided to dampen torsional oscillation, wobble, etc. of the drum prior to imprinting.

Abstract: A game racket with a metallic frame having a head formed with an external opening groove to receive a stringer strip of suitable flexible material that is positionable within the groove of the head frame so as to protect the strings forming the playing surface of the racket from contact with the metallic frame, and stringer strip retaining tabs in position between the stringer strip and the surfaces of the groove to resist removal of the stringer strip from the groove.

Abstract: A thermally sensitive check valve is disclosed in which a bimetallic snap disc functions in one position as the check valve element and in another position to either maintain the valve open as in one illustrated embodiment, or to maintain the valve closed as illustrated in another embodiment. By combining the check valve function and the valving function in a single bimetallic snap disc, a simple and reliable device is provided.