US1990143A - Antiglare device and method of making it - Google Patents

Description

Feb. 5, P. V. SNOW v ANTIGLARE DEVICE AND METHOD OF MAKING IT Filed April '7, 1930 1 270 7&720/2 Q /2014] 6y L GUI/ 4 jlarizeyi Patented Feb. 5, 1935 v PATENT OFFICE ANTIGLARE DEVICE AND-METHOD OF MAKING IT Philo Vernon Snow, Chicago, Ill. Application April (I, 1930, Serial No. 442,058 4 Claims. (01. 91- 68) My invention relates to a filter or antiglare device. One object is the provision of means for shielding the eye of a user from bright light .or glare. Another object is the provision of such a filter or shield which, although effective to shield the-eye of the user from bright lights or'glare, will still permit the user to distinguish, through 1t, signal lights and the like, in-their proper re-' lationship. Other objects will appear from time to time in the course of the specification and claims. V 1

I illustrate my invention more or less diagramnatically in the accompanying drawing, wherem- Figure 1 illustrates an elevation;

Figure 2 is a section on the line 22 of Figure n I Figure 3 is a section through the parts employed for the filter; and

Figure 4 is a section through the filter, with the parts assembled and positioned.

Like parts are indicated by like symbols throughout the specification and drawing.

A generally indicates a frame member passing across the front of a vehicle, and A indicates any suitable windshield or window member for such a vehicle.

Secured to the member A I illustrate a base member B with a bracket or arm B forwardly projecting therefrom. B are any suitable securing means, such as screws. The member B is indicated as terminating with a hinge, eye B alinged with eyes B of the end of the pivoted link B B indicates any suitable pivot or hinge member passing through the members B and B The member B is longitudinally slotted as at B".

slidable along the member B is the block C. It may be clamped at any suitable position therealong as by the nut C screwthreaded for locking engagement with the bolt or screw C which passes through the slot B". The block C is apertured as at C slidable to receive the stem 0*. C represents any suitable thumb nut or locking member adapted to lock the member 0 against longitudinal movement through the aperture 0 Positioned at the lower end of the pin C is the yoke D having the downwardly turned arms D Opposed to each such arm D is an ear D pro-.

jecting upwardly from the transverse member D D indicates any suitable bolts with the lock nuts D whereby the members D and D may be held againstrotation in relation to each other.

E indicates the filter member proper which is herein illustrated as being secured, along its up- E a coating of gelatin, glue or the like, indiper edge E bythe transverse member D It will be understood that the member E is transparent or translucent to a varying degree. I may for example, have a zone E of substantially com plete transparency, formed, foreXampIe, of untinted glass or equivalent material. Beginning, for example, along the general line, E I may employ coloring material or pigment or light obscur ing material of any suitable color or type, the

light obscuring or absorbing effect of which in- 10 I creases progressively upwardly toward the upper edge of the filter. I prefer to employ a color, such as a shade of brown or a dull green which,'I have found, permits the eye of the observer to distinguish the visual signals ordinarily used, such as red, green and amber lights, one purpose being to reduce the strain upon the eye of the observer, when driving into bright lights, while avoiding the extremely undesirable result of making it more dimcult for the observer to distinguish visual signals. I

As a means of forming such a filter I may employ two separate sheets of glass, as shown in detail in Figures 3 and 4 and indicated as E E While I do not wish to be limited specifically in my filter or in my method of making it, except so far as I limit myself specifically in my claims, I suggest as a practical method of making such a. filter the provision of an intermediate layer E, which may be of celluloid, bakelite, or some sub- 0 stance sufiiciently transparent for the purpose, while less brittle than glass. I may thenapply to either or both faces of the member E or to the inner face of either of the glass members E 35 cated in Figure 3 as E". This gelatin serves as means for precipitating the coloring matter to be employed. It will be understood that while pref- 1 erably I employ two sheets ofglass and an inter- 40 vening' sheet of celluloid, that nevertheless I may find'it practical, under some circumstances to l omit the celluloid. Also I may apply the gelatin' and the coloring matter to bothcelluloid and glass, or to glass alone, or to celluloid alone. Whatever coloring matter or obscuring matter I may employ may be applied directly to the surfac of celluloid, bakelite, or glass, or may even be incorporated in the substance of the glass, eel-.-

afiected by the atmosphere. I may for example employ a manganese compound, permanganate -of potash or some equivalent manganese com- 3 that the time of exposure, or the volume of material employed vary, increasing upwardly from the line E. If the material is being flowed or wiped or brushed on, the treatment for the upper portion of the filter may be kept up longer .than for the lower. For example a single even coating might be put on, and subsequent coats may be applied, each such coat starting somewhat higher up on the filter. On the other hand, when dipping the member E, the upper edge E will be dipped more frequently in the solution or left longerv in the solution than thelower edge, the area below the line E not being treated at all, if clear glass is desired throughout that area.

Referring to Figure 4, E indicates a thin layer of cement, whereby the glassmembers E and E? are bonded or cemented together about the inner member E The result is, in efiect, shatter proof glass. It will be understood, that whereas a surrounding layer of cement forms a ready means for securing E E together, other means may be employed, such as a surrounding metallic frame, or such as pressing or cementing the members together about or against the celluloid sheet E". It will be understood that while the employment of a lower band E of clear glass is a practical solution of the problem, I do not wish to be limited to any specific disposition of coloring matter, except so far as the specific language of my claims sets out, and I wish the description and drawing to be taken as in a broad sense illustrative and diagrammatic rather than as limiting me to my specific showing.

The use and operation of my invention are as follows:

In employing the filter herein described I provide means, as shown in Figures 1 and 2, for adjustably positioning the filter forwardly of the eyes of the user. Assume that it is employed in an automobile. The member E, when in use, may be positioned considerably closer to the eye of the user, than the windshield, and is preferably positioned. at such a level that the user, by tilting his neck or by raising or lowering himself somewhat in his seat can raise his eyes in relation to the member E. When used for night driving a practical setting is to position the filter so that the driver will naturally and easily look vrea ies through the clear strip E If a car with bright lights approaches, the operator rises slightly so that his eyes are aligned with the shaded area E. The brighter the lights the higher will he lift his head, it being understood that the upper portion of the filter is sumciently opaque to permit the user to drive into very bright lights without annoyance. Taking another case, if the user is driving into bright sunlight, at sunrise or sunset, or into any constant light, he may adjust the member E somewhat lower so that his eyes will at all times look through a relatively opaque portion of the filter.

It will be understood that whereas I have illustrated my filter as forming a separate panel mounted within the windshield, I consider it within the field of my invention and within the terms of my claims, unless specifically otherwise limited, that the filter may be mounted outside the wind-shield, or mounted just within the windshield, although I have shown it as spaced laterally well within the wind-shield in the particular embodiment illustrated as for example in Figure 2.

I claim:

1. The method of coloring a transparent body which comprises coating said body with a color absorptive material, dipping the coated body into a solution of a manganese compound, and causing said manganese compound to be precipitated in said color absorptive material.

2. The method of coloring a transparent body, which comprises coating said body with gelatin, dipping the gelatin coated body into a solution of a manganese compound, and causing said manganese compound to be precipitated in the gelatin coating.

' 3. The method of producing a colored ray filter which comprises. applying a coating of gelatin to a sheet of transparent material, dipping the gelatin coated sheet edgewise into a water solution of a dye, and controlling the immersion by moving the sheet to cause the portion first entering the dye solution to remain in the solution a sufiiciently longer time than the last inserted portion, whereby the gelatin coating will accept varying amounts of the dye, and whereby the coloring applied to the gelatin will increase in density progressively toward said first entering portion.

4. The method of producing a colored ray filter which comprises applying a coating of gelatin to a sheet of transparent material, dipping the gelatin coated sheet edgewise into a coloring solution, and controlling the immersion to cause the first entering portion to remain in the solution longer than the following portions, whereby the gelatin coating will accept varying amounts of the color, and whereby the coloring applied to the gelatin will increase in density progressively from the last portion dipped toward the first entering portion.

PHILO VERNON SNOW.

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