Abstract: This device is a film retainer for reel stored film comprising of a closed loop of elastic mesh material which is relatively inelastic in a transverse direction and relatively elastic in a longitudinal direction, with the extension of the elastic material at least 50%. The mesh is open to the degree that at least 50% to aid in viewing all printed matter on the leader of the film. A tag, for use in placement and removal of the loop as well as for identification purposes, is secured at one end of the loop and is of sufficient length to extend beyond the edge of the reel when the retainer is placed on a roll of film on a reel.

Abstract: A bow saw useful for camping, backpacking, tree pruning, wood cutting, and like outdoor usages particularly, which comprises a rigid tubing having opposed differentially dimensioned distal and proximal ends defining opposed saw blade receiving slots in a common plane, a saw blade having differentially proportioned distal and proximal end portions singularly orienting the blade relative to the bow in the bow slot received condition of the blade, and blade retaining apparatus carried by the blade within the bow tubing in blade distal and proximal end portion defining relation.

Abstract: A low frequency air-to-air and air-to-ground communication system is described. The propagation characteristics of low frequencies and very low frequencies are such that less signal attenuation is encountered at intercontinental ranges when the system is operating in the TE mode as compared to the TM mode. The TE mode is defined as having a dominant vertical magnetic field component and the TM mode is defined as having a dominant vertical electric field. Also, the receiver in an aircraft is subjected to less ambient noise when it is positioned to receive the TE mode. However, ground transmitters are inefficient at transmitting and receiving the TE mode because the ground image tends to cancel out the transmitted and received signals.

Abstract: A speed measuring device is provided for use as a diagnostic tool to analyze the sub-cyclic dynamic performance and to monitor the condition of moving elements within a mechanical or electromechanical system. Substantially instantaneous, absolute speed measurements are derived from elapsed time measurements between successive sensing of fixed, equal, position events such as generated by incremental position pulses of a shaft position encoder; said encoder being attached to one of the moving elements within the said system. An assessment of the dynamic performance and condition of the system is ascertained by comparing the speed profile with previous speed profiles obtained during normal system operation. Comparative differences in the said profiles provide an indication of changes of the driving and friction forces within the system which, in turn, can provide an indication of faulty elements.

Abstract: An improved hand gun grip comprising a body of resilient elastomeric material defining an outer gripping surface and an interior conforming to the frame of the hand gun to which it is to be attached, and including a plurality of mating surfaces having matching recesses. Dumb-bell shaped fasteners rest in the matching recesses and include an enlarged surface bearing against the recess to maintain the grip halves in compressed edge engagement. A peripheral ridge cooperates with the fasteners to insure tight edge contact.

Abstract: Water driven personal massager for use in spas, hot tubs and like open-topped water enclosures suitable for bathing and having a pressurized water supply. The massager utilizes flow restricted pressurized water directed against a pulsating means to induce vibration in a hand holdable massager head coupled to the pulsating means in pulsation transmitting relation.

Abstract: A gun sling employing a wide shoulder portion and a narrow gun attachment portion. A transitional region between the two portions includes an aperture for the thumb of the wearer near his chest. The aperture is symmetrically located for either left or right shoulder use and is spaced from the edge of the sling by a distance consistant with the thumb-forefinger gap for comfort.

Abstract: A shift register connected to elementary gates is added to a digital network to form a fault simulator. The shift register and the additional gates can select a connection from the digital network and simulate a fault on the selected connection. Connection selection is done at a speed comparable to that at which the digital network operates and fault simulation is nondestructive. By resetting the shift register the fault simulator performs as if the digital network were fault-free. To simulate certain faults in the digital network a predetermined fault injection pattern for the faults to be simulated is entered into the shift register.

Abstract: An improved specialized punch designed to produce, in a single motion, one or more openings through a tough plastic lid of the type used as covers for disposable beverage cups. The punch employs a scissor action and includes a pair of handles having mating jaws one of which has one or more punching dies and the second, an anvil with matching openings arranged in an concave arcuate array. In one embodiment the main jaws include a stop which limits the advance of the jaws onto a lid and properly positions the jaws for piercing the lid. The jaw likewise includes a guide which holds the upstanding rim of the lid for precise positioning during punching. In another embodiment the punch presents the appearance of an office stapler and includes an arcuate shaped male cutting die and a plurality of guide grooves for different size lids.