# US 5,343,981 A · Emergency cable descent system

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- Number: US 5,343,981 A
- Document ID: US5343981A
- Status: Granted
- Kind: A
- Application number: 08/125,767
- Filed: 1993-09-24
- Granted: 1994-09-06
- Earliest claimed: 1993-09-24
- Inventors: Cyril R. Schroemges; Gene F. Kull, Jr.
- Web page: https://patentgrep.com/patent/US5343981A

## CPC

- A62B 1/10: mechanically operated
- A62B: DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING (valves specially adapted for medical use A61M39/00; life-saving devices, apparatus or methods specially adapted for use in water B63C9/00; divers' equipment B63C11/00; specially adopted for use with aircraft, e.g. parachutes, ejector seats, {B64D17/00, B64D25/10}; rescue devices peculiar to mining E21F11/00)

## Abstract

An emergency cable descent system for lowering a person from a building in an emergency situation. The system includes a boom which may be pivoted outside a window of a building to support a cable away from an exterior of the building. The cable is contained upon a spool which rotates against a force of a friction brake to provide a constant rate of descent. The friction brake is actuated by a solenoid system to control the rate of descent according to the body weight of the person. Alternate embodiments of the present invention include both a mechanical siren for alerting other occupants of the building to a use of the system and a mechanical brake assembly which may be utilized to control the rate of descent in an absence of electrical power.

## Claims

### Claim 1

A new emergency cable descent system for lowering a person from a building having a window, said system comprising:
a cylindrical axle secured to said building;
a spool having an interior surface rotatably, concentrically positioned on said cylindrical axle;
a cable having a pair of ends and being partially wound upon said spool;
a boom pivotally mounted to said building proximate said window;
a pulley coupled to said boom, said cable passing over said pulley;
a harness coupled to one of said pair of ends of said cable; and,
brake means coupled to said building for controlling a rotational speed of said spool with respect to said cylindrical axle, wherein said brake means comprises a solenoid in electrical communication with a power source and positioned within said cylindrical axle, and a brake pad coupled to said solenoid, with said cylindrical axle having an aperture formed therein, whereby said solenoid is operable to bias said brake pad through said aperture in said cylindrical axle and into engagement with said interior surface of said spool.

### Claim 2 (depends on 1)

The new emergency cable descent system of claim 1, wherein said brake means further comprises a brake controller means in electrical communication with said solenoid for electrically adjusting a force exerted by said brake pad against said interior surface of said spool.

### Claim 3 (depends on 2)

The new emergency cable descent system of claim 2, and further comprising a case enclosing said spool and having a storage compartment for releasably containing said harness.

### Claim 4 (depends on 3)

The new emergency cable descent system of claim 3, and further comprising a mechanical siren means supported by said case and mechanically coupled to said spool for generating a noise upon a rotation of said spool.

### Claim 5 (depends on 4)

The new emergency cable descent system of claim 4, and further comprising a manual brake means coupled to said case and engagable to said interior surface of said spool for further controlling a rotational speed of said spool with respect to said cylindrical axle.