Abstract: There are provided certain novel halo lower alkyl benzoyl esters of di(lower alkyl amino) lower alkanols and the quaternary salts thereof, in particular the bromomethyl benzoyl esters of dimethyl aminoethanol and choline which possess activity as insecticides and cholinesterase inhibitors. The corresponding formyl benzoyl esters exhibit similar activity.

Abstract: A rotary piston engine has a plurality of explosion chambers situated around the periphery of the housing and includes within the housing a piston. According to the preferred embodiment, a housing having H recesses would contain a piston having P = H-1 lobes. According to the preferred embodiment, the structure of the housing relative to the piston, and vice-versa, has been improved to give optimum results. The relationship between the housing and the piston is such that it may be characterized by an optimum mathematical relationship which can make the construction of such machinery simpler than has been heretofore known. Additionally, the relationship between the improved piston and housing configuration is related to other engine parameters such as the compression ratio and efficiency.

Abstract: The closer mechanism of a warp knitting machine equipped with slide needles includes an apparatus which allows the closers to automatically align themselves with respect to the slide needles. The self-aligning apparatus includes a closer mounting means which is slideably engagable in a slot in a closer mounting bar. As the closers engage the slide needles, the self-aligning apparatus allows the closers to become aligned relative to the needles in a position of least resistance.

Abstract: An improved portable Safety Barrier may be used to prevent accidental entry into dangerous areas. According to a preferred embodiment the barrier comprises a bar means and a pair of attaching means, typically clamps, connected at the two ends of the bar means. A C-type clamp may be employed to connect the bar means to a U-shaped support or a two plate clamp means may be used to attach the bar to the point where two U-shaped struts converge in a T. The attaching means can also comprise a shackle type clamp for attachment to rounded objects or it may be a pointed tip suitable for attachment to a surface having receiving holes therein.The bar means may comprise a telescoping assembly in which one member is slideably received in the other so that the length of the assembly is adjustable to match various width passageways. Alternatively, two pipes or bars of different diameters may be attached together by a suitable diameter reducing means.

Abstract: A novel compensation lever is associated with the guide and dropper bars of a warp knitting machine equipped with conventional Jacquard controls. In conventional warp knitting machinery equipped with Jacquard controls, the droppers of the dropper bar often impart an undesirable force to the guide bars during the knitting operation. The novel compensation lever of this invention is so arranged that when the dropper bar is displaced in a predetermined direction, a certain proportion of the displacing impetus is transferred to the guide bar in order to bias the guide bar in the same direction as the force of the return spring attached thereto.

Abstract: Cis- 9-tetradecenal and cis-11-hexadecenal have been synthesized and found to be, in combination, sex attractants for males of the species Heliothis virescens (Tobacco Budworm Moth) and major economic pest. Methods of preparing said compounds and methods of utilizing said compounds as attracting agent are disclosed.

Abstract: An improved pipe cap comprises a cover and a U-shaped handle pivotally connected thereto. The handle includes a pair of rounded lugs which are adapted to engage an annular groove in the pipe end when the pipe cap handle is rotated toward its locking position. When the handle is rotated away from the locking position and towards the unlocking position, the lugs cooperate with the groove so as to cam the cover off of the pipe end. This novel camming action helps to overcome the resistance frequently associated with breaking the seal between a pipe end and a pipe cap.An alternate embodiment of the improved pipe cap is fitted with lugs having a pronounced flat on one side. The alternative cap is intended to fit on a pipe adapter having a flat locking rim instead of a groove. The rim includes two slots 180.degree. apart which are engagable by an appropriate wrench to thread the adapter onto a fill pipe. The lugs on the cap are located in such a manner that at most only one lug can fall into a slot.

Abstract: There are provided novel fluorogenic substrates comprising a ketoside formed between an N-acyl neuraminic acid and a highly fluorescent material containing a phenolic grouping. The presence of neuraminidase is detected by contacting the aforementioned fluorogenic substrate with a sample suspected of containing neuraminidase. Neuraminidase, if present, cleaves the ketosidic linkage, releasing the fluorescent material which is then detected by known methods. There is also provided a novel and efficient method of preparing such fluorogenic substrates utilizing cadmium carbonate as a catalyst.

Abstract: A bottle holder and clamp, fitted with tubing and nipple permitting unattended bottle feeding of an infant from the contents of a bottle enclosed in the device.

Abstract: An absorbent tipped liquid applicator apparatus is equipped with a mechanism for selectively capping and uncapping the tip in response to manual pressure. The applicator includes an absorbent tip and a body which normally contains a reservoir of fluid. A flexible sleeve is attached to the body at one end. A spring loaded sleeve retractor is connected to the other end of the sleeve and is flexibly attached to the body of the applicator also. In its capping mode, the sleeve is drawn over the absorbent tip and is clamped there by the retractor means. When the retractor means is squeezed, it opens up the end of the sleeve and withdraws it so as to effectively uncap the tip. Releasing the manual pressure on the retracting means causes the sleeve to return to its capping mode position. This technique can be applied to nylon tipped pens, felt tipped marking and highlighting pens, glue sticks, shoe polish applicators and the like.

Abstract: A novel type of swimming goggles includes an improved means for receiving corrective lenses. The corrective lens forms the outermost face of the goggles and is easily insertable. The novel swimming goggles of this invention are inexpensive to manufacture. The lateral vision of the swimmer is improved due to the transparent sidewall construction of the goggles. A resilient gasket between the goggle socket and the face of the swimmer allows for a watertight seal therebetween.

Abstract: An improved steam boiler system includes an automatic means for injecting cool water into a steam bound boiler feed pump. In a first embodiment a pressure sensitive check valve detects the drop of pressure in the steam bound pump and in response thereto directs a cool water mist into the high side of the pump, thus reinitiating its operation. According to a second embodiment, cool water is sprayed into the pump in response to a drop of the water level in the boiler. In both embodiments, a vent line is used to bleed the high side of the centrifugal pump to a condensate tank in response to a drop of pressure in the pump. The vent line may be bled through a check valve or directly through a manual valve. Additionally, both embodiments employ a pressure sensitive valve in the boiler feed line, which shuts off the pump flow to the boiler whenever the pressure in the boiler exceeds the pressure at the output of the pump.

Abstract: Lysozyme from human, avian, non-human mammalian, and vegatable sources is isolated from said sources and provided in a high degree of purity by adsorbing the lysozyme upon chitin obtained from Loligo vulgaris by contacting said chitin with an acidic aqueous suspension of the crude lysozyme containing material, and eluting the pure lysozyme from said chitin with aqueous acid.

Abstract: A plastic film mirror is formed by attaching a highly reflective, metallized polyester film to a frame having a rigid base section and a resilient upper section capable of bending inwardly towards the interior of the mirror, and subjecting said film to an elevated temperature for a specific period of time to cause the film to shrink in at least one direction. The shrinking of the film urges the resilient upper section of the frame inwardly thereby causing said film to be maintained in a state of constant tension by the restoring tendency of the resilient upper section. The plastic film mirror may be further provided with a means for modifying the reflective characteristics of a portion of the mirror. The means preferably comprises a shallow dish located behind the mirror which when evacuated draws the reflective film inward and thereby causes a concave indentation.

Abstract: An electronic tour guide system including means for suppressing objectionable crosstalk and noise is described. Crosstalk suppression is achieved by means of a comprssor in the transmitter and an expander in the receiver. Objectionable noise between loops is eliminated by means of a squelch circuit which reduces power drain whenever the received signal is below a certain threshold. The transmitter and receiver are designed to handle a plurality of information signals simultaneously. For example, a listener can select one of several different languages broadcast within an antenna loop. The transmitting loop antenna is matched in impedance to the output of the channel means in the transmitter so that maximum power transfer is obtained. Each receiver is further equipped with a gravity operated mercury switch which turns off power to the receiver when the receiver chasis is inverted.

Abstract: A collar for a golf bag tube, comprising an annular member having axially directed inner and outer surfaces, and a plurality of axially spaced projections on said external surface.