Showing papers on "Guard (information security) published in 1980"

Students and Class Warfare: The Social Roots of the Red Guard Conflict in Guangzhou (Canton)

Abstract: Until recent years, scholars of modern China had generally assumed that in the Cultural Revolution violence of 1966–68 young people were almost arbitrarily joining one or the other of the opposing Red Guard groups. Only within the past few years have researchers begun to unveil the antagonism among students early in the Cultural Revolution over “class” issues and the resulting differences in the composition, tactics and goals of the Red Guard factions.

Door edge guard

Abstract: An edge guard comprises a generally U-shaped cross section with insulated beads formed at the outer marginal edges of the legs which apply the retention force to the door edge. The invention provides a construction which is self-retaining on different types of surfaces. The metallic material of the edge guard is 5052 H-23 aluminum.

Saw including resiliently mounted flexible guard means

Abstract: A saw handle adapted to have a blade engaged therewith and further including a gripping area to allow a user to firmly hold the saw handle, the saw further including a flexible guard member which is movably secured to the saw handle adjacent to the blade such that the flexible guard is movable to extend along the toothed edge of the saw blade to be attachable thereto for protection of the teeth of the saw blade as well as for protection of the surrounding environment from the teeth of the saw blade, the flexible guard being secured to the handle by way of a resilient retaining member such as a spirally wound recoil spring which will wind the flexible guard means automatically in a circular fashion within the handle whenever the guard itself is not being pulled outwardly for placement adjacent the toothed edge of the blade, the handle defining a recess into which the flexible guard and the resilient retaining member are located, the flexible guard possibly further including a hook eye adapted to slide into a slot defined by the blade at the forward edge thereof to hold the guard in fixed engagement with respect to the teeth of the blade, in this manner the automatically recoiling flexible blade guard will be retained in a somewhat remote location whenever the saw is in normal use and will be able to be withdrawn from the recess and placed in engagement with the teeth of the blade easily and quickly, the blade also preferably including a knife area for starting cuts as defined by the blade member.

Location transmitting system

Abstract: A location transmitting system for use by one or more guards in a security system. Encoders are located at predetermined reporting locations which have no power supplies. Each guard carries a walkie-talkie radio transmitter which he places in a receptacle at the reporting location, energizing the encoder through external terminals in the receptacle which mate with external terminals of the walkie-talkie and its power supply.

Underride device for a trailer or truck

Abstract: A guard beam is disposed below the bottom of the rear end of a trailer or truck. Energy absorbing members are connected between the trailer and the guard beam. When impact forces applied to the guard beam exceed predetermined minimum levels, the guard beam collapses and energy is absorbed in the absorbing members during the collapse of the beam.

Guarded locking device

Abstract: A guard for protecting the shackle of a padlock used for locking a locking device in the engaged position comprises a U-shaped member having plate limbs, the shackle being received in the space between the limbs to be protected by the limbs against cutting by means of a tool such as a saw, a file or a bolt clipper.

Machine with finger protection guard

Abstract: A machine for affixing e.g. snap fasteners, rivets and the like to workpieces has a stationary lower tool and a downwardly movable cooperating upper tool. To protect the finger of an operator against injury by the tools the machine also has a finger guard positioned to move ahead of the descending upper tool. The finger guard is mounted on two parallel upright links which are longitudinally shiftable relative to each other. When the finger guard encounters an obstacle this results in shifting of one link relative to the other and two normally engaged contacts in an electrical circuit for the machine drive move apart, interrupting the circuit and shutting down the machine drive.

Aerial cable guard

Abstract: A cable guard having a cover which rotates about an aerial cable when stepped upon by an animal. A weight maintains the cover in an upright position when no animals are on the cover.

Seating and guard rail structure for bleachers

Abstract: A seating and guard rail structure for bleachers having seating sections which may be compacted together to occupy a minimum space during storage and having guard rail units which may be compacted along with the seating sections. Mechanisms are included for turning the guard rail units when the seating sections are compacted to facilitate their storage and for turning the guard rail units back again to their normal upright position when the seating sections are expanded in preparation for use; also locking mechanisms are provided for locking the guard rail units in their upright positions when the seating sections are fully expanded for use, and means are provided for unlocking the guard rail units when the seating sections are compacted.

Protective guard for the throat area

Abstract: A neck collar having a guard at its front for shielding the throat area from any violent striking force thereagainst; the guard including an air-inflated padding which upon its front side is shielded by a metal grill.

An Approach to Developing Underride Guard Requirements for Improved Occupant Protection

Abstract: To determine optimal performance characteristics for guard structures, a comparative engineering analysis was performed using a car crash simulation model with a variety of guard force-deformation characteristics. From this analysis the risk of injury to occupants of passenger cars was determined based on excessive underride (decapitation potential), and collision forces imparted to the occupant. Variables in the analysis included collision speed, car size, occupant free travel distance, and the rear wheel position of the heavy vehicle, as well as the various force-deformation characteristics representing the different types of underride guard systems.

Rodent trap guard

Abstract: A rodent trap guard having a hollow housing receiving a trap, the housing having opposite open ends for rodent access and for trap insertion. The upper side of the housing having a trap viewing opening, the guard being of a strength for substantial protection of the trap from forklift collision.

Maritime Patrol Airship Study /MPAS/

Abstract: : The Maritime Patrol Airship Study is an airship system applications study sponsored by the U.S. Navy and U.S. Coast Guard. Eight Major Cost Guard programs are analyzed for cost effective benefits of modern Lighter-Than-Air (LTA) vehicles. Representative script scenarios are developed for the eight programs based on actual Coast Guard mission experience. The scenarios are then used to size conceptual vehicles. In addition to in-house vehicle analysis, two independent efforts for comparative purposes based on the same scenarios were performed by contractor support.

Retractable derailment guard suspension

Abstract: A derail guard to prevent derailment of railed vehicles which can be readily attached to existing equipment is disclosed. The derail guard is particularly useful for track construction and repair equipment.

Hand guard for circular blade - has guard plate with smooth edge, locked in groove in guard ring

Abstract: The hand guard is for cutting machines, esp. sausage cutters. It consists of a C-shaped blade guard ring, partly surrounding the blade, and a removably connected blade guard plate. The guard plate (9) has a circular arch-shaped disc-like circumferential edge (9b). The edge is inserted into a ring groove in the inner circumference of the blade guard ring (7), directly next to the cutting edge (5a) of the blade (5). The guard plate is retained by a pin, in the lower section of the groove, and by a rapid-action lock (11), containing a locking cam (13), which engages over the plate.

Improved under-ride protection in moderate speed crashes

Abstract: New devices to increase under-ride protection were developed and crash tested. The improved under-ride guards provided significantly greater under-ride protection with little or no increase in guard weight. They employed materials and processed currently in use in the semitrailer industry.