Abstract: A holster employing a holster body and a liner which cooperatively define a weapon pocket and including a metal reinforcement between the liner and the body which at least partially defines the shape of a handgun carrying cavity. Secured to the reinforcement is a leaf spring having a free length extending on the side of the reinforcement toward the handgun cavity. A controllable extension device such as a screw engaging the free end of the spring causes a controlled deflection of the spring into the handgun cavity a distance which is a function of the screw position. The liner covers the spring member whereby the spring serves to expand the liner inward against the side of the handgun applying direct frictional contact with the handgun to the extent desired by the user and controllable merely by tightening or loosening the screw.

Abstract: A combined watch, elapsed time counter and pulse rate meter which is totally portable and worn as an ordinary wristwatch. The timer and pulse rate meter employ the precise timing elements such as a crystal oscillator of the digital watch. Using such precise timing elements, the human's pulse may be measured on a pulse by pulse basis and the instantaneous and average pulse values simultaneously displayed to allow a running comparison and noting of pulse aberrations. A novel pulse detector assembly is located on the inner face of the watch assembly.

Abstract: A shoulder holster employing an over-the-shoulder strap which includes a broadened support area and a narrower holster engaging portion at each end. The holster body is made up of a single or multiple piece assembly defining a holster pocket and including elongated upwardly extending support arms at an acute angle to provide two directional supports to the holster body. The upwardly extending portions of the holster include a plurality of transverse slots having a width approximating the width of the elongated support portion of the shoulder strap. The elongated portions of the shoulder strap are interleaved or woven in and out of the slots of the upwardly extending support portions of the holster. The end of the shoulder straps extend beyond the last transverse slot in the holster whereby a precise adjustment of the elevation of the holster, both front and rear, may be accomplished by the position of engagement of the shoulder strap with the multiple slots.

Abstract: A sliding door lock assembly providing the feature of automatic unlatching if closed when in a latched position along with effective normal operation and burglar resistance. It employs a latch member spring biased to an open position and cammed into a closed or latched position by a lever member. If the latch is in a locked position and is impacted with the door frame upon closing, it is translated and moves the locking lever to an unlocked position. The locking lever includes a jaw portion which engages the latch effectively. The latch is generally T shaped with the head of the T within the housing of the assembly.

Abstract: A compact lightweight resuscitator system for use by paramedics and rescue personnel is described. The basic apparatus, including a full cylinder of oxygen, weighs about fourteen pounds. It comprises a single channel aluminum frame on which is fastened an oxygen cylinder, a regulator and low pressure manifold, a demand valve with three sizes of resuscitator masks, a regulated and indicated flow inhalation circuit, a set of airways, and a variable rate aspirator with hose and catheter. Additional accessories, which bring the weight to sixteen pounds, include a humidifier for the inhalation circuit, another line and coupler for attaching a second oxygen cylinder and an IV stand. The resultant system enables all standard procedures to be used by paramedic personnel and rescue technicians but is greatly reduced in size and weight.

Abstract: A multichannel coherent receiver employing multiple delay lines in series or a tapped delay line into which a received signal band is introduced. The signal band at each tap or increment of delay is mixed with individual related frequencies and the product from the mixers summed and further mixed with the output of a swept oscillator. The composite delayed signal band is introduced into a bank of dispersive filters followed by means for deriving in-phase and quadrature components. Signals contained within the signal band may then be detected resulting in coherent channelization, improved frequency resolution and full time coverage sampling.

Abstract: A solar energy collection system including a number of parabolic section reflectors mounted for rotation about their lines of focii. A drive system continuously rotates the reflectors at a one cycle per day rate in one form. Positioned at the line of focus of each reflector is a receiver tube carrying a heat exchange medium. The receiver tube is fixed and non-moving and is surrounded by a fixed transparent tube shielding the receiver tube from air currents. The transparent tube is sealed except for a leakage path through a desiccant containing chamber which is in thermal transfer relationship with the receiver tube and communicating with the ambient atmosphere. Means for cleaning the reflectors when in the inverted position is provided. Another embodiment provides for sun tracking and automatic night storage and cleaning. Novel mirror receiver tube and desiccant assembly features are disclosed.

Abstract: A tennis training device for releasably holding a tennis ball at any height appropriate for the practice of serves and ground strokes is disclosed. The apparatus comprises a base and standard for the support of a cross arm from which depends a cord attached by suitable means to a regular tennis ball. A mass member is attached to the cord at a distance above the ball in the described embodiment to prevent the wrapping of the cord about the cross arm when the ball is hit. The mass member is enclosed in an elongated member which is attached along its entire length to the cord, thus further minimizing cord wraps. The fastening means uses a hook material, Velcro or the like, as a means for lightly gripping the ball, but allowing it to release easily when hit so that the trajectory of the ball is not affected by the presence of the fastening means. The cross arm member is manufactured from a single aluminum tube and is angled downward toward its free end so that wraps of cord on the cross arm will tend to fall off.

Abstract: A condition monitoring system such as a hospital oxygen monitoring and analyzing device which is battery powered and of such low current drain circuitry that the monitor may be maintained ON continuously. The circuitry senses battery condition when the end of battery life is approaching as indicated by terminal voltage drop. The circuitry continues to provide an accurate display but also indicates a part of the display and additional symbol. The circuitry provides a separate indication under calibration conditions, and the improved voltage regulator includes a transistor back biased to breakdown as the regulation device. A remote sensor is used and engaging the sensor with the unit, automatically powers all circuitry.

Abstract: A bicycle lock mountable on the frame of a bicycle and including a body which stows a "U" or "J" shaped member and a cable or other flexible securing mechanism when not in use. Both are removable from the body with the "U" or "J" shaped member movable into a position encircling a rim of a wheel on the bicycle to prevent it from movement. The cable or the like is movable to encircle a support to which the bicycle may be locked. The cable terminates one end in the body of the lock and the other end in the "U" or "J" shaped member. An integral lock holds the "J" shaped member in fixed relationship with the body and covers or conceals the mechanism securing the body to the frame and bicycle. A retraction mechanism maintains the cable within the body except to the extend withdrawn for locking purposes. In alternate embodiments the cable encircles the lock body for storage. An integral mounting bracket is illustrated as well as a permanently mounted bracket used with a removable lock assembly.

Abstract: A signalling system designed to transmit and reliably detect alpha-numeric information with a single pulse indicating each different numeral from 0 to 9 and letters of the alphabet or code symbol. Each alpha-numeric symbol is coded in a single pulse of discreet difference lengths at the transmitting station. At the receiving station the train of pulses which is received is introduced into a transmission line having multiple taps with each tap related in position to detect a particular alpha-numeric encoded pulse. The transmission line is terminated with an impedance mismatch whereby each pulse is reflected back down the line. Detection occurs when the leading edge and the trailing edge of a pulse are coincident at the tap. Pulses having a length differing by only 40 nanoseconds (.+-.20 nanoseconds) are easily detected. The range of pulse lengths for a 40 numeral code recommended is 110 nanoseconds to 1990 nanoseconds with an average tap separation of 24.87 nanoseconds.

Abstract: A brake system for a vehicle having two sets of brakes, a front set and a rear set of brakes and including a source of fluid pressure, a driver controlled valve, in which the sets of brakes respond to fluid pressure from said source via said driver controlled valve, including a secondary valve having at an input port a connection to the driver controlled valve and its output port coupled to the rear brakes, and in which the secondary valve means produces an increase in pressure at the output port above the pressure of the input port, in which the secondary valve including time delay means for reducing excess pressure at the outlet port to reduce the pressure at the outlet port to substantially the pressure at the inlet port after the application of pressure to the inlet port by operation of the driver controlled valve.

Abstract: A circuit and a computer program for enabling the monitoring of a plurality of switch settings at remote sites by central telephone exchange equipment through regular telephone lines is described. To compensate for slow drift variations in line impedance, the impedance of each line is continually calculated from the measurements, and any small change is used to update a line impedance correction factor, while any large instantaneous change is used to update the data counter. Telephone exchange battery variations which may be large and instantaneous, are compensated for by measuring the battery voltage immediately prior to measuring the line impedances, and correcting the line impedance readings with a battery voltage correction factor. Other types of temporary signal interference which are frequently present in telephone switching equipment are identified and rejected by applying consistency criteria to multiple readings which have been corrected by the aforementioned method.

Abstract: A vehicle performance analyzer which determines and displays instantaneous miles-per-hour, miles-per-gallon and miles-to-end-of-tank. The instantaneous outputs are calculated by a microprocessor using a vehicle speed sensor coupled to the drive shaft of the vehicle transmission, a fuel flow sensor introduced in the fuel line between the fuel pump and the carburation system and an analog-to-digital electrical signal converter connected to the electrical fuel gauge. The microprocessor is directed by a resident program contained in read-only memory, which also contains a calibration procedure allowing the person installing the device to accurately calibrate the device to the particular vehicle on which it is installed. This eliminates the need for a variety of special sensors designed to meet the variable needs of different makes and models of vehicles. It also eliminates inaccuracies due to variances in some parameters of different vehicles of identical makes and models.

Abstract: A buckleless belt employing a closure device or fastening means which positions and holds the two ends of a belt. The closure device virtually completely concealed from the front and affords a minimum additional thickness to the belt in the overlapping region where the fastening means is located. The fastening means comprises a plate member secured to the inner side of the outer end of the belt including guides for aligning the edges of the inner end of the belt. An inwardly depending pin on the plate member spaced longitudinally from the guides engages one of the series of holes in the end region of the inner end of the belt. A looplike belt keeper retains the free inner end in close proximity to the outer end of the belt. The outer end of the belt conceals most or all of the holes in the inner end.

Abstract: An apparatus having at least one alternately expanding and contracting chamber comprises a plurality of cylindrical rollers each having an exterior surface in continuous rolling engagement with two adjacent rollers, the rollers being rotatable along parallel axes, with at least one of the rollers rotating about an eccentric and/or reciprocating axis. The rollers are preferably of equal length with adjacent rollers being in contact substantially along their entire respective lengths, the chamber being defined between the rollers and enclosed at its ends by end plates.

Abstract: Apparatus to be used in conjunction with the practicing of a musical instrument is described. The circuit contains and interconnects an electronic metronome, a timer, a tape recorder, a tone generator, earphones, and the electronics for integrating these elements, as well as an internal power supply. This apparatus is particularly well suited to the needs of the advanced student who plays well and desires to progress to the professional level since the interaction of the elements forces the student to play the instrument with speed and accuracy while under time pressure. The combination of elements also leads to a flexibility of functions. Finally, all elements are implemented from electronic components, resulting in a small, low cost, reliable system.