Showing papers on "Guard (information security) published in 1977"

Secure optical communication components, method, and system

Abstract: A transmitter of information to be communicated in secure form is optically coupled to a composite optical fiber at one end, the fiber being connected to a receiver of the secure information at the other end. The composite optical fiber has cores including a central core for carrying the secure information, one or more guard signal cores, a cladding matrix surrounding all the cores, and a metallic or other nontransmissive film surrounding the central core but not the guard cores. A guard signal optical transmitter section is coupled to the guard cores for jamming any leakage of secure information through the film, and a guard signal receiver section is provided at the other end of the fiber for monitoring purposes. The optical transmitter apparatus employs pulse code modulation (PCM) and sends related security bits in the guard and secure signals. The optical receiver apparatus features amplitude monitoring and a comparison of the related security bits and provides a warning when unexpected changes indicative of tampering are observed.

Protective guard for passenger vehicle

Abstract: To provide passenger protection when a vehicle rolls a protective guard is mounted juxtaposition the passenger seating arrangement. This protective guard includes a roll bar with a support brace hinged thereto. Both the roll bar and the support brace have cross members and leg members which are adjustable to meet the requirements of different vehicle designs and installations. At the end of the leg members for the support brace there is pivotally attached mounting pads, which along with mounting pads of the leg members of the roll bar, are used for attachment of the protective guard to the passenger vehicle.

Spray guard for vehicles

Abstract: A movable spray guard to be lowered alongside the ground engaging wheels of a vehicle including a flexible screen mounted in a track and moved by a motor driven chain from an operative position to an inoperative retracted position.

Guard rail device

Abstract: A guard rail device for attachment to a large wheel diameter vehicle. The guard rail device is attached in each side of the vehicle and comprises: A horizontal guard rail extending from about the rear of the front wheels to about the front of the rear wheels of the vehicle and extends substantially within the plane of the rear and front wheels of the vehicle. The guard rail device is positioned at such a height that when the vehicle is traveling across a road surface the guard rail does not touch the road surface. The guard rail device further has height adjustable attachment members for attaching the guard rail to the vehicle. When the vehicle is traveling across the road surface and an object collides into the side of the vehicle the guard rail prevents the object from falling under the large diameter rear wheels of the vehicle.

Radial arm saw guard

Abstract: A lower guard assembly for both sides of the blade, which retracts a minimal amount while cutting, providing a maximum of blade enclosure and consequent protection for the operator.

Hand and guard rails

Abstract: A hand and guard rail system has a clamp member made up of two identical elements which have semi-circular sectional portions at right angles to one another. The elements co-operate in clamping so that each portion forms a tubular portion to locate a pair of tubular rail members at right angles to each other.

Guard rail cell

Abstract: Disclosed herein is a cell used preferably with a guard rail to absorb the impact of a vehicle which crashes into the rail. The cell converts the kinetic energy of the automobile and absorbs it by distortion of the cell. The effect of the cushion is that it redirects the vehicle back to the roadway without causing severe damage to the vehicle guard rail or posts.

Safety brake mechanism for chain saws

Abstract: A guard member is mounted on the chain saw for swinging movement between an actuate position and a reset position. The guard member occupies a normal position between the actuate and reset positions. A brake band is integral with a bowed column spring which applies the braking force to arrest movement of the cutting chain. A latching mechanism includes an arm with a latch pin engaged by a yieldable latch finger; this latch finger is integral with the bowed column spring. The guard member deflects the latch finger in response to movement of the guard to its actuate position; this action allows the column spring to apply the brake. The guard member is moved to its actuate position in response to a sudden movement of the chain saw, as in the case of "kickback"; this movement of the guard member is brought about by inertia or the engagement of the guard with the operator's body (most likely the wrist or the back of his hand) during this abrupt movement of the chain saw. Manual swinging of the guard to its reset position deactivates the brake and re-establishes the latch.

Silencing means for rotary cutting tools and particularly circular saws

Abstract: Noise output of a rotary cutting tool such as a circular saw blade is substantially reduced by means of a guard which wholly encloses the blade when the blade is not cutting and which comprises fixed and movable imperforate guard members, the movable guard member being movable to expose only the cutting segment of the blade. Inner surfaces of the flat side walls of the guard have sound absorbing means such as a Helmholtz resonator array or a layer of acoustical foam. Modifications of the guard to optimize its silencing effectiveness are disclosed.

Shackle guard for padlocks

Abstract: A shackle guard is provided for a padlock. The guard includes a housing having a cavity in one end. Reliefs are provided in the housing for receiving, into the cavity, a shackle portion of a padlock and a member to be secured by the padlock. A shackle-securing member is provided in the housing for securing the shackle within the cavity.

Animal protective guard

Abstract: An animal guard assembly for protecting pedestals for underground telephone lines or electrical transmission lines comprising an animal guard assembly carrying animal repelling elements, such as, barbs, mounted on a support arm and means for removably attaching the support arm to a pedestal or a support for the pedestal in various positions so that the animal guard assembly can be moved to various orientations to protect the pedestal against rubbing by animals, and the support arm carrying the barbs removed to permit workmen to work around the pedestal.

Lower leg guard for football players - has stiffened foam rubber shin and calf guards combined into one piece

Abstract: This lower leg protector for use in field games such as football consists of a shin guard (1) and a calf guard (2) which are connected onto one piece. Both parts (1, 2) are made of stiff foam rubber on the inner surface of which is covered with fleece to soak up sweat. The outer surface of the guards is provided with pockets (3) in which stiffeners (9) of stiff nylon can be inserted. The lower end of the calf guard (2) is extended at each side to provide ankle protection. The extentions (5) are connected by a bridging strap (7) which fits under the wearer's instep. The shin guard (1) is connected to the calf guard (2) on one side only between the lower end of the calf and the ankle extension. The two parts are held together by means of straps (12), on the clf guard which carry fixing strips which grip into the shin guard surface.

Safety guard for work platforms

Abstract: A safety guard for work platforms, such as on a wheeled earth working vehicle, wherein the guard comprises a handrail assembly mounted on the platform, with mounting portions of the assembly being formed with a reinforcing member in the area of normal greatest strain, providing structural integrity, and with mounting attachment means being confined within the peripheral outline of the platform, and therebelow, and hidden from view.

Latch for overhead guards on industrial vehicles

Abstract: Industrial vehicles including overhead guards of the type maintained in a first position by a weighted member and released to a second position when the weighted member is removed, are provided with a latch for latching the guard in the first position and movable to unlatch the guard for release to the second position.

Campon system of automaic exchange machine

Abstract: PURPOSE:To nullify confused lines at the time of multiplied campon which making instantaneous identification of each respective trunk and to guard against the lengthy waiting time by a multiple of times during the state of a multiple number of campon.

Sterility guard for piercing devices, connectors and needles

Abstract: A sterility guard for piercing devices, connectors and needles such as are used in the medical and surgical fields, which gives positive indication if the same has been removed from the piercing device or other connector and subsequently replaced, thereby compromising the sterility of the device. In one form a tubular guard closed at one end is adapted to be applied over a blood spike, for instance, and a projecting portion at the open end of the guard is provided with an integral extension which is engageable in an opening in a portion of the blood spike or a connector of another kind. This extension has a weakened or attenuated portion which is broken when the guard is removed to give a positive indication that the guard may have been removed even though it is later replaced. In another form the guard is used to protect the sterility of the otherwise exposed ends of a pair of connectors or the like. In this form the guard itself may comprise a tubular member open at both ends and an extension such as referred to in the preceding paragraph will be provided at each end of the tubular guard, one of the extension being connected with each of the connector portions which is being protected by the guard.

Protective handle for a hand-held striking tool

Abstract: A protective handle is provided for a hand-held striking tool having an impact-imparting leading surface and an elongated stem extending in an outward direction from the impact-imparting surface. The handle includes an elongated elastic socket grip lying on and defining an axis and fitting over and firmly united with a portion of the elongated stem. The socket grip has two axially spaced ends, one of the ends being closer to and the other of the ends being farther from the impact-imparting leading surface of the tool. A concave guard is mounted at this other end of the socket grip and is open in the direction away from the leading surface. A convex guard is mounted on the socket grip between the concave guard and the one end. This convex guard is connected to the concave guard, and is open in the direction towards the leading surface.

Latch guard and deep pile fabric circular knitting machine fitted therewith

Abstract: An improved latch guard having a forwardly extending deflector arm integrally associated therewith. When the improved latch guard is incorporated into a deep pile fabric circular knitting machine, the deflector arm eliminates the problem of stray fiber build-up on the front edge of prior art latch guards during operation of such knitting machine.

Intrusion alarm system utilizing the barking of a watchdog

Abstract: A system is described which detects the sound of barking of a watchdog and generates an electric signal in response to that barking. The electric signal, suitably processed by electronic circuitry, is used to operate an appropriate intrusion reaction device, such as an audible alarm, floodlights, or a remote indicator device located at a guard or police station.

Handrail for human conveyor

Abstract: PURPOSE:To rapidly install both members of skirt guard and molding portion for human conveyor by disposing fixing round screws of the guard to underneath the screws of the molding portion and providing the height of the guard to the lower side of the screw.

The deskbook of art law

Abstract: "The Deskbook of Art Law" offers commentary on the purchase, protection and preservation of fine and applied art, addressing the effect that the established definitions have on laws, regulations, and endorsements. This insightful work can help guard against seizure, loss, prosecution, and embarrassment by ensuring the strength of contracts, the validity of claims, and the ownership of rights. It is updated approximately two times per year.

Trash guard for gutter

Abstract: PURPOSE:To protect the passage of a gutter from stopping up by larger trash such as fallen leaves, by arranging a trash guard consisting of an elastic member.

Skirt guard of escalator

Abstract: PURPOSE:To prevent a pinch trouble between stairways by a system characterized in that a skirt guard is formed of double construction consisting of a face plate 8 made of a synthetic resin sheet of 1 mm or more in thickness, and a back reinforcing plate.