US1943917A

US1943917A - Prevention of skidding of vehicles

Info

Publication number: US1943917A
Application number: US621759A
Authority: US
Inventors: Josky Walter
Original assignee: Individual
Current assignee: Individual
Priority date: 1931-08-08
Filing date: 1932-07-09
Publication date: 1934-01-16
Anticipated expiration: 1951-01-16

Description

Patented Jan. 16, 1934 UNITED STATES PATENT OFFICE No Drawing. Application July 9, 1932, Serial No. 621,759, and in Germany August 8, 1931 16 Claims.

The object of my invention is a method for the prevention of skidding of tyres particularly rubber tyres used on power driven vehicles on slippery pavings with the aid of an anti-skidding material applied to the tyres when required before or during the motion of the vehicle.

'It has already been suggested to pretreat bicycle tyres for the purpose of improving their friction on polished floors under cover by applying on their surface a solution of resin in alcohol, ether, acetone or similar materials. Such a coating, while in the moist condition, has a lubricating effect and therefore increases the tendency of the tyre to skid. After the complete evaporation of the solvent, there remains a varnish-like coating of brittle character, which crumbles off very easily. It may be possible to obtain in this way the desired effect with bicycles used on floors under cover. In view, however, of

the strains to which the tyres of power driven vehicles are exposed, such pretreatment would in any case be useless and probably harmful.

It is further known to apply anti-skidding ma terials to the tyres of motor vehicles during the motion of the vehicle by means of a suitable apparatus. Such anti-skidding materials consist of a mixture of sand or other small solid materials and a fluid of viscous or adhesive character. The addition of such fluid is made in order to prevent the skidhindering sand from being spread uselessly by causing it to adhere to the tyres surface.

While rubber moistened with water becomes extraordinarily slippery, my present invention,

on the contrary, makes use of the new and surprising conception that the humidityitself can be employed to obtain an effective protection against skidding. For this purpose I use a solution of resin in an organic solvent as skid-preventing agent; this solution forms an extremely sticky and adhesive material as soon as it comes into contact with and is thus diluted, with water, the resin being in this manner liberated from the solution. The extremely sticky material deposited on the tyres alone gives the desired anti-skid effect. The fact that sand and other waste material of the road adheres to this material increases the protection and extends its effect.

The effect can be further intensified and extended by the use of a solution which consists of resin and wood pitch or wood pitch alone in alcohol or acetone.

A special advantage of my new process is to be found in the fact that it will sufiice to carry in the car a relatively small quantity of the said solution to provide on a long journey the desired protection against skidding, whereas hitherto very considerable quantities of sand were needed when using sand-spreading devices for the same purpose. Furthermore, an approximately equivalent effect cannot be obtained in the latter way. On smooth and slippery roads it will suffice to apply to each of the four tyres from time to time, according to conditions, 1 c. c. of the solution; the moisture of the road will dilute the solution and transform it into a material of extreme viscosity and adhesiveness.

Solutions of resins of any kind can be used for'practising the process, for example of colophony or coumarone resin in alcohols, if desired with addition of organic acids such as acetic or lactic acid. Concentrated or diluted alcohol can be used.

For instance resin. and alcohol of 96 vol. in equal parts are mixed with heating. Of this solution small portions of equal volume are applied to the surface of the tyres either while the vehicle is stationary or moving. The dilution with water' is effected in a suitable way, for example by means of the humidity of the road, or by apso plying water to the tread of the wheels while the vehicle is stationary. In this way the resin is instantly liberated as a viscous, sticky material which makes any skidding of the tyres impossible.

Furthermore, a solution can be employed com- 8 posed for example of 30% of resin, 30% of wood pitch and 40% of ethyl alcohol of 96 vol. heated together under a reflux condenser. This solution, after the removal if required of nondissolved portions can be used as anti-skid material.

The effect of the sticky material as produced on the tyres not being a permanent one, the application of the solution must be repeated when required. Such application can, for example, be effected by atomizing the solution onto the surfaces of the tyres, the solution being distributed from the drivers seat from a container under pressure through pipelines. 100

The application of my invention is not limited to motor vehicles with rubber tyres; the same result will be obtained with iron-wheeled vehicles on rails such, for example as railways, tramways and suspended railways.

I claim:-

1. A process for the prevention of the skidding of tyres particularly rubber-tyres of power driven vehicles in which a solution of resinous material is applied to the tyres as required, said solution being then tronslormed into a viscous and od== hesive material by dilution with water.

2. A process for the prevention of the skidding of tyres particularly rubber-tyres of power driven vehicles in which a solution of resinous meteriol with addition of an organic acid is applied to the tyres as required, said solution being then trenciormed into 2. viscous and adhesive materiel Toy dilution with water.

3. A process for prevention of the skidding of tyres of power driven vehicles, in which a solution of resin in alcohol is employed.

A process for prevention of the skidding of tyres of power driven vehicles, in which at solu= tion of resin in acetone is employed.

5. A process for prevention or the skidding oi tyres of power driven vehicles, inwhich a solution of resin and wood pitch in alcohol is employed.

G. A process for prevention of the skidding or tyres of power driven vehicles, in which n solution oi resin and wood pitch in acetone is employed.

l. A process tor prevention of the skidding of tyres of power driven vehicles, in which a solu tion or wood pitch in alcohol is employed.

. 8. A process for prevention of the skidding of tyres of power driven vehicles, in which n solution of wood pitch in acetone is employed.

9. A. process for the prevention of the skidding of tyres of power driven vehicles, in which small portions of equal volume of a solution of resinous material are from time to time applied to the surfaces of the tyres and diluted by water while the vehicle is stationary.

ll). A. process for the prevention of the skidding of tyres of power driven vehicles, in which small portions of equal volume of e solution of resinous material are from time to time applied to the surfaces of the tyres and diluted by water while the vehicle is in motion.

ll. The process of increasing the grip of tyres oi power driven vehicles which comprises applying to the tread of said tyres a solution of a, resinous material which upon admixture with water will liberate resinous material in a. sticky condition and thereafter producing the admixture or water with the said solution applied to the tread, whereby resinous material is liberated upon the tread in a sticky condition.

12. The process of increasing the grip of tyres of power driven vehicles which comprises applying to the trend of said tyres a solution of a, resinous materiel which upon admixture with water will liberate resinous materiel in a sticky condition, said solution at the time of application being substantially free from gritty material, and thereafter producing the admixture of water with the said solution applied to the tread, whereby resinous material is liberawd upon the tread in a sticky condition.

13. The process for increasing the grip of the trends of wheels of vehicles or traction machines which comprises applying to the trend 2. solution of a resin in a. solvent which is soluble in water to such an extent that the resin will be, at least in part, liberated from solution upon admixture with water, and thereafter effecting liberation of resin in a sticky condition by means of water.

14. The process for increasing the grip of the treads of vehicles or traction machines which comprises applying to the tread a solution comprising a resin in a solvent, from which solution the resin will be liberated in a. tacky condition by intimate contact with water, and thereafter effecting the liberation of the resin in a. tacky condition by means of water.

15. The process of producing an anti-slipping composition which comprises intimately mixing water with. a solution of a resin in a solvent which is miscible with water.

'16. An anti-slipping composition comprising an intimate mixture of water and a solution of a resin in as solvent which is soluble in water.

WALTER J OSKY.