US1876362A - Antidazzle fitting for head lamps - Google Patents

Description

Sept. 6, 1932. s'. E. TALBOT 1,876,362

ANTIDAZZLE FITTING FOR HEAD LAMPS Filed May 29, 1931 2 Sheets-Sheet 1 Mrs/Woe, STA/VLEYZ. 7 9 5 7 Sept. 6, 1932. v s; E. TALBOT 198757352 ANTIDAZZLE FITTING FOR HEAD LAMPS Filed May 29, 1931 2 Sheets sheat 2 Patented Sept. 6, 1932 I UNITED STATES PATENT orrlcsf STANLEY EDWARD TALBOT, orMn'R'roN PARKING-LAND ANTIDAZZLE FITTING FOLRIHEAD LAMPS Application filed May 29, 1931, Serial Him-541,009; and in Great Britain Jiine' 6,1930.

This invention relates to anti-dazzle fittings for headlamps, of the kind having a plurality of concentric rings for dividing the beam, and provides means constructed in an improved manner for supporting the rings in requisite spaced relation-.7. v According to my invention, a flat disc of metal is} cut in such a manner as to produce a hoop j formation and plurality of substantlal- 1U: ly radially-disposed vanes connected thereto byv narrow neck portions, the vanes being transversely slotted from one side edge. In course of manufacture ofv the fitting, or in order to enable it to be brought into use, the

-' t5. vanes are bent out about their sai-d neck portions to assume positions at right angleszto the'flat: plane of the hoop, those edges at which the slots aforesaidopen out being then outermost and; adapted to receiveconcentric rings "so; inserted into the slits from a lateral direction.

'1 Preferably, the vanes, priortobending up as aforesaid, have their connection neck portions located at one end of the vane in; each case so that the vanes are directed all in the 2, same-circumferential direction, and in a preside ofthe double-hoop base' and atthe one side thereofonly. a

Owing to the vanes being formed from the body of material existing between the inner and outerrings as aforesaid, scarcely any material is wasted, resulting in extremelyc'heap production. V

Thefinvention is applicable generally to anti-glare devices incorporating concentric rings to form a support for-the latter, and is particularly suited for use with the anti-glare apparatus forming the subject of my prior Patent No. 1,7 7 3,245,2is the necessary tapered formation of vanes to suit the varying widths of rings can be conveniently produced according to'my present invention.

, further advantage of my invention consists in that the vanes are supported without need for meetingor intersecting one another at the axis of the lamp, so that. accommoda-.

tion is thereby left for axially-disposed lamp,

supporting means as sometimes exists in headlamps. c i

In o rder that the invention may be readily understood, reference is directed to theac companying drawings, illustrating a practi 5 cal form of the invention, and wherein Figure 1 is avface view of the ring-support device as formed from a flat disc and prior to bending; Y

. Figure 2 is a similar view showing the rings 5 fitted after bending back the vanes." r

Fi-gure 3'is a side view of the ringsupport with vanes bent back but prior to, fitting rings and of: the assembly of rings for fitment'theren. v r t i 7.0 Q Figure at is a face view of a device for cove 'eringthe front edges of the vanes after fitting the rings. v

2 Figures 5 and 6 are fragmentary sectional views illustrating two different methods of ensuring correct location of the rings.

, Figure v7 is a fragmentary perspective View of an alternative ring-location method; Referring to the drawings, requisite portions of, a circular metal disc or plate are cut 80.

out to leave an outer hoop 7 and inner disc or hoop 8 and a desired number of vanes 9,, which latter arethus connected by said outer andinner parts. j

v The vanes 9 are bent back to assume positions at right angles'to the plane of the rev maining inner andouterparts and such bending is permitted and facilitated by narrow neck portions 10 by which the said vanes, are

connected tothe inner disc and outer hoop. 9

The vanes are formed with a number of parallel slits extending for a requisite distance backfrom the front edges thereof, and the rings 12 are inserted thereinto from where these slits open out at such front edges. Some of the rings may be incomplete, as shown, to permit of a greater diversion angle of beam through a desired segment.

In order to retain the rings 12 inposition in the vanes and to impart a finish at the front, a spidermember (Figure 4) is provided, the legs 13 of which are brought into alignment with the vanes, each leg being then bent to channel form so as to embrace the front edge of the vane between its two cheeks so formed. Gaps 14 are formed in the side edges of the said spider legs 18 to clear the front edges of the rings. The spider memher is secured to the vane and ring assembly in any suitable manner.

' In the space existing at the centre of the fitting and bounded by the inner edges of the vanes, is fitted a hollow cylinder 15 which fits over and is secured to ears 16 bent back from the centre disc 8. Segmental projections 17 of a central disc 18 of the spider (Figure 4) also are bent back and secured to the cylinder 15, and the latter is formed with stamped out projections 19 to serve as locating members'for the vanes 9, each of which fits between pairs of such projections.

To ensure true and concentric formation of the rings when assembled, each of the rings maybe constructed with a number of pressedout ribs 20 (Figure 5) corresponding to the number of vanes to be engaged thereby, and positioned to correspond therewith, the material of which the ring is made beingpressed out of its circumferential line in order to form said ribs, each of which extend in a line from front to back of the ring parallel to the axis thereof. The said ribs, at their apices, are adapted to pass into the slots formed in the radiating vanes 9, and it will be followed that unless the rings are correctly positioned and in their true circular formation they cannot be passed into the said slots and assembled. In forming the slots in the vanes, allowance is made for the degree of displacement of the ribs from the circumference of the rings. Alternatively, tabs 21 (Figure 6) may be pressed-out of the rings to lie on the respective sides of the vanes and ensure proper location of the rings.

In amodification (Figure 7) the slots 11 in the vanes 9 are made less than the'required lengths for properly accommodating the respective rings, the rings 12 being formed with slots 22 extending from their back edges in positions corresponding to the said frame parts or plates to interfit with the latter and allow the rings to pass properly into place only when correctly positioned and of a true circular form.

In order to form slots in the radiating ivaeee vanes 9, of the necessary very narrow width for accommodating the rings 12, each of the said vanes at the required positions, may be cut or slitted from its front edge and the edges of the material formed by the cutting or slitting operation are pressed away or bent laterally to one side so as to cause the said out or slit to open and form a slot of the re"- quired thickness. This method of forming the slots overcomes the difiiculty that would otherwise be experienced in cutting out a slot of very narrow width.

1. A blank of sheet material to be formed into a supp'ort. for light beam constricting elements comprisinga ring, a center element, a plurality of vanes extending between said ring and said center element to be bent to operative positions at substantially right angles to the plane of the ring, and relatively narrow neck formations at the ends of the vanes connecting the same with said ring and said center element,respectively, to facilitate bending of the vanes.

V 2. A support for light beam constricting elements comprising a ring, a plurality of vanes carried by and disposed at substantially right angles'to the plane of said ring, said vanes having slits opening through the front edges thereof, light beam constricting elements engaged in said slits, and-a spider element inclusive of legs overlying the front edges of said vanes and said light beam constricting elements to retain said elements engaged in said slits 3. A support as set forth in claim 2 in which the legs of the spider element are pro vided with formations extending rearwardly between the light beam constricting elements. 4. A support-for light beam constricting elements comprising a ring, a plurality of vanes carried by and disposed at substantially right angles to the plane of said ring, said vanes having slits opening through the front edges thereof, light beam constricting elements engaged in said slits, a cylinder at the inner ends of said vanes, and connections between the inner ends of said vanes and said cylinder whereby the cylinder serves to hold the vanes against lateral deflection.

5. A support for light beam constricting elements comprising a ring, a plurality of vanes carried by and disposed at substantially right angles to the plane of said ring, said vanes having slits opening through the front edges thereof, light beam constricting elements engaged in said slits, and formations on the light beam constricting elements engageable with opposite sides of the vanes within the length of the slits in the vanes to hold the light beam constricting elements against sliding movement through said'slits transversely of the vanes.

6. A support for light beam constricting elements comprising a ring, a center element,

a plurality of vanes extending between said ring and said center element and disposed at substantially right angles to the plane of said ring, said vanes having slits, light beam constricting elements engaged in said slits, a cylinder mounted on said center element and disposed inwardly of the inner ends of said vanes, and connections between the inner ends of said vanes and'said cylinder.

In testimony whereof I have aflixed my signature hereto this 19th day of May 1931.

STANLEY EDWARD TALBOT.

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