US1258289A

US1258289A - Bulb-stenciling device.

Info

Publication number: US1258289A
Application number: US13347316A
Authority: US
Inventors: Overton Winston
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-11-25
Filing date: 1916-11-25
Publication date: 1918-03-05
Anticipated expiration: 1935-03-05

Description

- O. WINSTON.-

BULB STENCILING DEVICE.

APPLICATION FILED NOV-25.1916.

Patented Mar. 5, 1918.

2 SHEETS-SHEET I.

O. WINSTON.

BULB STENCILING DEVICE. APPLICATION man Nov. 25. 1916.

Patented Mar. 5, 1918.

2 SHEETS-SHEET 2.

. fied form of the stencilingdevice;

UNITED STATES ovna'roN WINSTON, on MINNEAIPOLI, MINNESOTA.

BULB-STENCILING DEVICE.

Specification of Letters Patent;

Patented Mar.'5,'191=8.

, Application filed Noveniber 25,1916. Serial No. 133,472.

T all whom it may concern:

Be it known .thatI, OvnR'roN WINSTON, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements Bulb-Stenoiling Devices; and I do hereby declare the following to be a full, clear, and exact "description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an extremely simple and highly efficient stenciling device for use in accurately, quickly and economically applying toelectric light bulbs, or the like, frosting or light dimming surfaces. Generally stated, the invention consists ofthe novel devices and combinations of deviceshereinafter described and defined in the claims.

It has been found. desirable to provide frosted surfaces or zones of various differ ent shapes at proper precalculated places on the globes of electric light bulbs which are to be used for headlights for automobiles and similar vehicles, and as above indicated, my invention provides a highly efiicient device for this purpose.

In the accompanying drawings which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to thedrawings, V

Figure 1 is a bottom plan view of the imroved stencilin device: 8 1

Fig. 2 is a transverse section taken approximately on the line 22 of Fig. 1;

Fig. 3 is a section on the line 33 of Fig. l;

Fig. 1 is a transverse vertical section taken through the hood extension of the stencil plate close to its outer end; I

Fig. 5 is a side elevation of an electric light bulb showing the manner in which frosting is applied thereto by'the use of a stenciling device; k Fig. 6 is a bottom planview corresponding to Fig. 1, but illustrating a; slightly modi- Fig. 7.is a section taken on'the ofFig.6;

I 1 Fig. 8'is a sectionon theline -8 8-of Fig. '6;.;a

Fig; 9-is a sectiomonflthehline' 9 ,9 of

- 55: Edge 7.

like 7 7 Referring first to theconstruction illustrated in Figs; 1 to4, inclusive, "the numeral 10' indicates the body or socket memberJof the stenciling device. This member- 10 fwould Preferably be rigidly secured to any suitable support, not shown. It is formed with a'v'ertical passage 11, which, at 1'2, joins, a concave bulbseat 13 that flares toward but opens at the bottom ofthe said socket member] 10. For spherical light 'bulbs, the passage 11 should be cyllndric'al' and the concave seat 13 should be rounded.

in horizontal cross section,'and, of course, the bearing shoulder formed at 12 should also be a true circle, so that the light biilb, -when seated against the san1e,.willfnot' have" contact with the flaring w'alls of the pocket 13.

-The stencil plate 14 isa concave convex structure formed with a stencilf open1ng15,

the outline of which is such as to give the desired form of "frosting. For example, if the frostingis 'tobe applied to a-spherical light bulb and is to have a circular mar-.

gin, then the stencil opening 15 should'have truecircular form. The said stencil plate is made of thin sheet metal 'or other suitable material which will spring at the edge of the the socket member 10, Here it should be noted (see paticularly- Fig. 1) that the perforation throughthe hinge lug 17 is of such shape and size that ,thc stencil plate may not onlyswing vertically, but may move slightly forward and rearward'and laterally. Furthermore, it will be noted that the spacing of the lugs 19 is such that there is clearance between the same and the hinge lug 17, thereby permitting the entirestencil plate'to shift laterally, as may be required to permit the'prop'er seating of the stencil againstfthe light bulb. At its sides, the reinforcing ring 116 has outstanding lugs that a'r e ;on-

nected tolthe lower ends of coiled springs 20,

the upper ends of'which are anchoredto lugs'21on' the upper front portion of the 1 ee k timem r a h i y I en ifi that the's'aidsprings, stand in a planethatis 90 pin 18 held by laterally spaced lugs 19' of approximately at a right angle to the plane of the stencil opening 15, so that they will pull the stencil against the bulb with equal pressure at all points.

At its front portion, the stencil plate 14: is secured to a hood-like extension 22 that is of relatively heavy material and is adapted to receive the shank of the light bulb.

The globe of the light bulb is indicated by the numeral 23, and its metal curved shank by the numeral 24. The metallic contact collar of the said shank 24 is shown as provided with the usual lock lugs or studs 25.

' Furthermore, the bulb shown has two filaments a and b, and has a frosted zone 0. In Fig. 5, the bulb is shOwn as it appears upon being removed from the stenciling device, but when used in the headlight it will be turned otherside up, so that its frosting 0 and offset filament 5 will be above the axis thereof.

The numeral 26 indicates a finger piece on the hood 22, and the numeral 27 indicates a light leaf spring anchored within the hood and engageable with the under surface of the shank of the light bulb. Here it may be noted that the outer end of the spring 27 terminates inward of the lugs 25, so that it will not be engaged by said studs when the bulb is rotated on the axis of this shank.

Then the frosting is-to be applied to atwo-filament light bulb, or for that matter, to a lamp having a single transversely extended filament, it is important that the frosting be applied to the bulb at the right position in respect to the filament, circumferentially of the bulb. Hence, to facilitate V the proper setting of the bulb, the socket member 10 is provided with a peep hole or sight opening 28 that alines radially with the positioned bulb so that the exact position of the filaments thereof may be observed while the bulb is held by the socket and stencil plate and rotated on its axis.

It will be noted that the stencil plate 14, as well as the pocket 13 have greater divergence than the surface of the light bulb so that the bulb will be engaged only by that portion of the stencil plate that is immediately adjacent to the stencil opening 15. This also provides for the holding of the bulbs thatvary somewhat in diameter, that is, that may be somewhat smaller or somewhat larger than the bulb shown in the drawings, and at the same time, maintains a close engagement between the light bulb and stencil plate. When the bulb is placed in the opening of the stencil plate 14 and the latter is allowed to move upward under the tension of the springs 20, the light leaf spring 27 will hold the shank of the bulb so that it will engage with the short stop edge 10 of the socket member 10, and thus set the axis of the bulb at a right angle to and .centrally of the plane of the stencil opening 15. 'The said spring 27 is, however, not

- the light bulb.

applied to the glass, will produce a frosting thereon. Of course, if desired, the frosting can be painted on the exposed portion of the bulb. or so far as this invention is concerned, it might be produced by sand blown against tie same. Atany rate, only that portion of the bulb upon which the frosting or like surface is to be produced, is exposed through the stencil plate' The stenciling device'shown in Figs. 6 to 9, inclusive, is like'thatalreadywdescribed with the following exception or additions to-wit, the stenciling plate here indicated by the character is has two

stencil openings

15 and 15 and further has a conical projection 14 alined with the top or point of It will be noted that the stencil opening 15 is circular while the opening 15' is crescent shaped. lhese openings will, of course, give correspondingly formed frosted surfaces on the light bulb.

The free end of the spring 27 (see particularly Figs. land 9) is made concave'or cylindrical in cross-section, so that it fits the shank of the light bulb and holds the same against lateral displacement'while it is being rotated on its axis.

much better chance for the metal of the stencil plate to be spring-pressed into contact with the globe ofthebulb.

By reference to Fig. 2, it will be noted that when the bulb is applied in the stenciling device, there is clearance between the upper portion of the stenciling plate and the lower edge portion of the socket memher, so that the springs 20 normally exert force pressing the marginal edge of the stencil opening against the globe of the bulb. What I claim is: V

1. A bulb stenciling device comprising a socket member having an opening terminating in a flaring pocket and formed with a bulb engaging edge at the junction between end and provided with a stencil opening.

through which a portion of the positioned bulb will be exposed for frosting, and yielding means for pressing said stencil plate against the bulb and the bulb against the ledge of said socket member.

2. A bulb stenciling device comprising a socket member having an opening terminating in a flaring pocket and formed with a bulb engaging edge at the junction between said opening and pocket, a stencil 'plate loosely hinged to said socket member at one end, and provided with a stencil opening through which a portion of the positioned bulb will be exposed for frosting, said socket member having a stop for engaging the shank of the bulb and said stencil plate having a yielding member engageable with said bulb shank to press the same against said stop.

3. A bulb stenciling device comprising a socket member having an opening terminating in a flaring pocket and formed with a bulb engaging edge at the junction between said opening and pocket, a stencil plate loosely hinged to said socket member at one end, and provided with a stencil opening through which a portion of the positioned bulb will be exposed for frosting, said socket member having a stop for engaging the shank of the bulb and said stencil plate having a yielding member engageable with said bulb shank to press the same against said stop, the said parts holding said bulb with freedom for rotation.

4:. A bulb stenciling device comprising a socket member having an opening terminating in a flaring pocket and formed with a bulb engaging edge at the junction between said opening and pocket, a stencil plate loosely hinged to said socket member at one end and provided with a stencil opening through which a portion of the positioned bulb will be exposed for frosting, and springs connecting the opposite sides of said stencil plate to the opposite sides of said socket member.

5. A bulb stenciling device comprising a socket member having an opening terminating in a flaring pocket and formed with a bulb engaging edge at the junction between said opening and pocket, a stencil plate loosely hinged to said socket member at one end, and provided with a stencil opening through which a portion of the positioned bulb will be exposed for frosting, and.

springs connecting the opposite sides of said stencil plate to the opposite sides of said socket member, the said springs being extended in a plane at a right angle to the plane of the stencil opening of said stencil plate.

6. A bulb stenciling device comprising a socket member and a stenciling plate hinged thereto and cooperating therewith to hold a light bulb with a portion exposed through said stencil plate, a spring yieldingly pressing said stenciling plate against the bulb and thelatter against said socket member, and a spring carried by said stenciling plate and'engageable with the shank of the bulb to position the same against a stop on said ,stenciling member.

7. A bulb stenciling device comprising a socket member and a stenciling plate hinged thereto and cooperating therewith to hold a light bulb with a portion exposed through said stenciling plate, a spring yieldingly pressing said stenciling plate against the bulb and the latter against said socket memher, and a spring carried by said stenciling plate and engageable with the shank of the bulb to position the same against-a stop on said stenciling member, the free end of said spring being concave in cross section to fit the shank of the bulb.

In testimony whereof I affix my signature in presence of two witnesses. V

" OVERTON WINSTON. \Vitnesses BERNIOE Gr. WVHEELER, HARRY D. KrLeoRn.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, 10.0. V