General

Best dog seat belt

Best dog seat belt

Best dog seat belt

A seat belt is a safety device that is worn by a driver, passenger, or occupant to reduce the likelihood of death or serious injury in the event of a collision. The seat belt is a type of restraint system designed to prevent the occupant's body from leaving the seat, which can minimize injury and loss of life in accidents involving motor vehicles.

Design

Most modern seat belts have a three-point harness:

A lap belt encircling the torso.

A lap belt buckle, with a belt guide on the passenger side.

A shoulder belt, either on the passenger or on the driver side, running diagonally from the buckle to the shoulder and lap belt.

A lap belt system is usually designed to be adjusted so that it runs diagonally along the torso of the occupant and snugly fits against the torso of the person sitting in the vehicle.

To comply with the United States Federal Highway Safety Administration (FHWA) requirement for passive seat belts, a seat belt must remain securely attached to the seat when subjected to an impact of at least 1.5 times the vehicle occupant's weight.

The seat belt is fastened at the buckle and, when installed properly, is automatically fastened and secured around the body, reducing the force of the occupant's body on the seat belt. A properly fastened seat belt applies the necessary force to stop an occupant from moving forward. This is accomplished by preventing the lap and shoulder belts from sliding away from the body.

A typical three-point seat belt has two parts:

A lap belt, which is a belt that wraps around the body.

A shoulder belt, which is a belt that runs from the shoulder or chest down the body and across the lap.

The shoulder belt is usually fastened diagonally, across the chest of the occupant. The buckle on the driver side is usually on the right-hand side of the seat. The shoulder belt is not to be confused with the lap belt.

When a seat belt is installed properly, it applies a force of 1.5 times the body weight to the body. The lap belt prevents the seat belt from being pulled free, and the lap and shoulder belts are locked together when the body load is applied. The seat belt may also apply a restraining force on the torso of the vehicle occupant, but the strength of the seat belt itself is only about 10% of the total occupant load.

History

The first seat belt to be tested was patented in 1895 by the French inventor Paul Landé. Landé was able to secure the seat belts with a simple mechanism which had a latch pin that locked the belt and could be locked in a released position by pulling a handle. In 1904 Landé's company, Houdin et Cie, began producing seat belts under the name Garantie Seau-Bil, and were among the first to mass-produce and sell seat belts in the country.

Other early seat belt designs were developed in the United States and Germany. An early United States seat belt was patented in 1896, and the belt was tested in 1907. The invention was patented as a type of seat belt called a "lap belt".

The first mass-produced seat belt, designed for use on a bus, was patented in 1920 by Edward Henry Hoey. In 1924 Hoey's seat belt was licensed by the Standard Motor Car Company, which began manufacturing the "Hoey Safety Belt" and selling them to car manufacturers. The Hoey design became the first widely used, modern lap belt.

In 1936, Harold G. Armstrong was granted a patent for a shoulder and lap seat belt and in 1938 he started selling the belt in the United States. In 1938 Armstrong's patent was acquired by Standard Products, which began manufacturing the "Armstrong Safety Seat Belt". Armstrong's belt has been adapted and incorporated into seat belts that are manufactured today. In the same year, Dr. J.C.S. "Jack" Williams received a patent for a seat belt design and began producing the first modern shoulder belt, which he called a "lap belt". The Williams Patent No. 2,118,857, which covers the shoulder belt, was granted in 1938.

In Germany, Adolf Otto Meyer designed a safety belt to protect automobile passengers.

Other inventions which were not patented but later used in the development of today's seat belts include:

H.G. Armstrong's lap and shoulder seat belt, patented in 1938

The "Norton Safety Belt", patented in 1941 by James A. Norton

The "Safety Belt", patented in 1944 by John J. Housen and David W. Stearns

The "Passive Safety Belt", patented in 1949 by George H. Hosea

Modern technology

There are three types of seat belts:

Air bag restraint systems, which are usually included in new cars.

Standard three-point belt systems, which are installed in most cars today.

Lap and shoulder belts, which are a combination of a lap belt and a shoulder belt.

The lap and shoulder belt is usually referred to as a "two-point" belt, although a lap and shoulder belt does not use two seat belt parts. The seat belt has a lap belt and a shoulder belt, and the lap belt usually locks around the body, and the shoulder belt runs from the shoulder or chest down to the lap belt, locking them together. The lap and shoulder belt may be combined with air bags.

Passive seat belt systems

In the passive seat belt system, a sensor is usually mounted to the seat back, which is capable of sensing a crash. If a crash is detected, the seat belt is automatically applied, and the belt may be locked at various places along the body, depending on the severity of the crash. A passive seat belt system is considered the safest in the event of a crash, because it helps to keep the occupant restrained until the seat belt can be fully applied and locked.

Passive seat belts are usually installed in new vehicles, which are sold in all 50 states. This is usually accomplished through a procedure in which the vehicle manufacturer installs a lap belt system with a sensor in each seat