US1754900A - Reflector - Google Patents

Description

, E. A. MILLER April 15, 1930.

REFLECTOR Filed J'gn 2, 1926 2 Sheets-Sheet 1 MLOw/m April 15, 19%. E. A. MILLER 1,754,900

REFLECTOR Filed Jan: 2, 1926 2 Sheets-Sheet 2 v M 9 @W/mJ/C lii Elli

unrreo snares EDGAR A. MILLER, F PHILADELPHIA, PENNSYLVANIA, ASSIGNOE OF ONE-HALF T0 CLEVELAND A. JAMES, 0F PHILADELPHIA, PENNSYLVANIA anrnncroi Application filed. January a, 1926. Serial Ito. W354,

The object of this invention is to provide a construction of triple reflector unit which,

when five of the same are grouped about a common center and in circumferential juxtaposition, an approaching light such as a headlight of an automobile is reflected back thereto, whereby the reflector imparts a sig nal brilliancy equivalent to a signal light having its own source of illumination.

With the above and other objects in view, the nature of which will be more fully understood from the description hereinafter, the invention consists in the novel construction of the tri le reflector as hereinafter more fully described and defined in the claim.

Referring to the drawings: Fig, l is a perspective view of the three parts oi the mold adapted for making a reflector unit embodying my invention, said mold parts in separated vertical alinement; Fig. 2 is a plan View oi the lower mold'part; Fig. 3 is a vertical section of the assembled. mold partswith a molded glass form therein, taken on line 33 at Fig. 32; Figs. l and 5 are respectively enlarged sectional views of the-abut ting edges of the lower and middle mold parts shown in 3; Fig. 6 is a diagrammatic view showing the preferred shapes oil the three surfaces of the bottom and top mold parts and also of the reflecting surfaces of the molded glass object; Fig. 7 is a plan view loolring dhwn into the open side of one of the molded glass reflector units ressedby use of my improved three part mo d; Fig. 8 is a perspective view of the molded reflector unit shown in Fig. 7; Fig. 9 is a plan view showing the central portion of the composite reflector when made up of five mold units in abutted and overlapping assembled relation; and Fig. 10 is a perspective view of one of the corners oi the molded unit shown in him. 7 and 8.

Generally speaking, the mold comprises a base member A adapted to be secured fixedly to the bed of the press, a plunger top member ll adapted to be vertically reciprocated by the plunger of the press and a removable inter mediate plate member B adapted to vrest upon the top of the base member A while permitting the passage of the plunger member beted portions 8, 8 and 9, the function of which will be later described. The preierred general shapes and proportions oi the triangular surfaces are shown in (i, from which it will be seen that the areas of the two right angled triangular surfaces li are identical with unequal side edges, while the surface 5 is considerably larger and constituting a triangle of more symmetrical shape and with two oi itsv side edges of equal length. The angular shape produced by the relation all these three triangular surfaces is such that the angle formed between the junction line of the two surfaces 5 and continued in a vertical plane through the surface 5* in 2 is a right angle, in general shape, the depressed portion or recess l is similar to the interior corner of a bon shaped cube.

Theintermediate plate member ll is of wannular form and triangular in horizontal shape, having a rim 10 which is flat upon its upper surface and formed on the under side to lit upon and cooperate with the upper rim part of the lower or base mold member A belore referred to. The central opening l0 is triangular and provided with vertical side walls, and also has a slightly lessarea than the area of the opening oil the recess in the base member A. The under surface oil the member E is provided with a triangular pro-- jecting rib 11 which lite into a corresponding triangular recess d in therim 7, the said per tions 8 and 11 being of relatively small. width (Fig. l.) on two of the sides as compared with the relative width of these parts on the other or remaining side (Fig. til, the former leaving space between the grooved portions ll of the rim 7 ct member A. it of the mem till ber B suflicientlly wide to provide molding space to mold the flange 12, u on .the body part of the article to be made y use of the mold, as shown in Fig. 4., whereas the latter provides no space corresponding to that between the parts 9 and 12, but instead an undercut surface recess 13 is provided on the member B at a level corresponding to the part 9, the rib 11 being made deeper with a corresponding lowering of the portion 8, as shown in Fig. 5. By reason of these constructions in respect to the cooperating parts of the members A and B, there is molded one non-flanged ed e l3 and two flanged edges 12' of the mol ed reflector unit as shown in Figs. 7 8 and 10, the former being at a lower lIeyel 1tian the latter, as clearly indicated in ghe upper plunger mold member C consists of a shank 20 for attachmentv to the plunger or platen of a press, and having at its lower part a triangular body or head 16 with vertical walls adapted to snugly fit the triangular opening 10 in the intermediate member B, said head having a downwardly extending pyramidal portion 17 formed with three triangular faces 18 similar to those shown in Fig. 6, but of slightly less area so that when fully entered into the mold members A and B (Fig. 3), spaces are left between its faces 18 and surfaces 5 in which the material to be molded is pressed to provide the reflecting side walls 21, 21* and 21, as shown in Figs. 3,7, 8 and 10. When the molten glass or other material is being pressed into the recessed triangular form with triangular side walls 21" and 21*, the flanged portions 12" are also molded to secure the flanged product shown in Figs. 7 and 8. The member 0 is further provided with the laterally projectin bars 19 across each of its angular corners igs. 1 and 3) which limit the distance the member C is permitted to enter the member A and also to firmly hold the intermediate member B down upon the base member A at moment of forming the flanges 12. The projecting bars act upon the annular member B at spaced points about its triangular opening.

Furthermore, it will be seen that the intermediate member B fits into and is steadied against lateral displacement relatively to the base member A, and likewise, the upper member C is accurately guided by the intermediate member B so as to insure a perfect alinement of the several members and provide a substantially closed space for insuring the molten glass or other material taking the triple triangular facets 21 21", 21 with the flanges 12 at the-upper edges of the facets 21 and 21, as shown in Figs. 7, 8 and 10. These articles D are employed as triple reflector units and are assembled in a circle about a common center as shown at E in Fig. 9, wherein it is seen that one of the flanges 12 of each reflector unit overlaps the radial edge 13 of the adjacent reflector unit; and moreover, the other flange 12 of each reflector unit forms the perimeter of the assembled structure.

The intermediate structure B is shown as provided on its upper part with studs 15, the same being arranged at its three corners. The function of these studs is for convenient handling of this member; and when removed, to act as legs for its support in an inverted position to prevent injury to its molding surace.

In the use of these mold parts, the molten glass in proper quantity is inserted into the emale or base member A after the annular member B has been placed in position upon it, and thereupon the upper 0r male member 0 descends through member B and into the mem r A, causing the glass to flow upward on all sides to fill the space between the three members, as indicated in Figs. 3, 4 and 5. When the molding operation is completed, the member C is lifted, the member B is removed and member C inverted to discharge its molded content. To permit this latter, the member A is provided with handle parts 2; and its centralization on the press bed is insured by the holes 6 fitting upon pins thereon (not shown).

It will be understood that, if desired, one of the flanges 12" may be omitted and consequently the parts 9 and 12 to mold it in members A and B may be changed to correspond to what is shown in Fig. 5 for forming the flangeless edge 13* to the article. In other words, the article may have two flanged ed es and one flangeless edge or one flanged e ge and two flangeless edges, as desired.

Having now described In invention, what I claim and desire to secure y Letters Patent 1s:

A reflector comprisin five overlapping reflector units arranged a out a common center and each unit formed of pressed glass and comprising three triangular shaped reflecting surfaces arranged at right angles to each other, the triangular rims of the reflector units each having one edge devoid of aflange, and an adjacent edge provided with an outwardly directed flange Whose under surface lies in substantiall the same plane as the flangeless edge, and wherein further, one of the triangular reflecting surfaces has an angle of 90 and two angles of each, and the remaining two triangular surfaces each have one angle of 90, a second angle of 35 and the remaining angle of and wherein also, the 90 angles of the three reflecting surfaces are grouped at a common point.

In testimony of which invention, I hereuntoset my hand.

EDGAR A. MILLER.

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