US 1743235 A
Description (OCR text may contain errors)
w. RAsTE-R Filed Oct. 24, 1928 m n fw @fi/[kr as er M if Jan. 14, 1930.
MEANS FOR DETACHABLY MOUNTING LAMPS oN Mnmns CAPs Patented Jan. 14, 1930 WAL'IHER EASTER, OF GHICAGO, ILLINOIS, ASSIGNOR TO JUSTRITE MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, .A CORPORATION OF ILLINOIS MEANS FOR DETACHABLY MOUNTING- LAIVIPS ON MINEBS CAPS Application filed ctcber 24, 1928.
This invention has for its object to provide simple and efficient means for lirmly mounting a miners lamp on a miners cap to cause the lamp to be held against lost motion or wiggling and, at the same time, rendering said lamp easily removable and replaceable and permitting the interengaging termations of the lamp and cap to be relatively adjusted to cause their interengagement to be more or less firm as desired by various individuals.
The present invention, in its preferred embodiment, is fully illustrated in the accompanying drawings, wherein:
Fig. l is a side elevation of a cap and lamp equipped with interengaging means constructed in accordance with the invention.
Fig. 2 is a detail longitudinal section of the interengaging means per se.
Fig. 3 is a fragmentary front elevation of the cap showing the formation of my invention.
Fig. 4 is a fragmentary rear elevation of the lamp showing the companion formation ot the lamp.
Fig. 5 is a fragmentary detail horizontal section through the interengaged formations of the lamp and cap.
All miners caps are equipped with relatively inHeXible Visors and with a lamp-carrier element equipped with means for engaging companion means on the lamp for detachably associating the lamp with the cap. The details of construction of these several means vary to a considerable extent.
In the instant case the cap l is equipped with the conventional visor 2 to which one end portion of the L-shane'd lamp carrier 3 is rigidly secured, the other end of said carrier 3 being secured to the crown of the cap. Thus the substantially vertical portion of the 'carrier 3 is spaced from the peripheral wall of the cap.
In the instance illustrated, the carrier 3v is of the conventional shape and material but, unlike other carriers, is equipped between the ends of the vertical portion with a transverse strap 4 of sheet metal having side edges flanged 5 which are L-shaped and have their terminals riveted or otherwise rigseriai' No. 314,836.
idly secured to the side edge portions ot Vthe carrier 3, the middle portion of the strap-4 being thus spaced from the face of said carrier a distance slightly greater than the thickness of the sheet metal tongue 6 of the lamp 7 which is adapted to be inserted between said middle portion of the strap 4 and the opposed face of the carrier 4.
Said tongue 6 constitutes an integral part of an inverted U-shaped member 8, the other arm of which is secured by means of buttonhead rivets 9 to the rear wall of the upper portion of the lamp 7. The rivets 9 are disposed in vertical alignment with each other midway between the side edges of the lastmentioned arm ot the member 8 and, in the present instance, two of said rivets v9 are shown.
In the arm or tongue 6 of the member 8 in axialalignment with the rivets 9, I provide perforations l0 which permit eXing and bending ot the member 8 to cause the tongue 6 to contact with the other arm of said member as the rivet heads will then project into the perforations 10 and not intertere with such ieXing. Thus the tongue G may be normally positioned to be so spaced from the other arm of the member 8 as to have no free space between the inner face of the tongue 6 and the plane of the crowns of the rivetv heads or to render said space of less width than the thickness oi the meta-l of which the strap 4 is composed.-
Consequently, when the tongue 6 is inserted into the free space behind the strap 4, the middle portion of the latter must be sprung past the rivet` heads against the spring pressure exerted by said tongue 6, thereby causing the tongue 6 to obtain a iirm hold on said strap 4 by yieldingly clamping said strap against the rivet heads.
The lamps ot' the calcium carbide type i shownare relatively heavy when loaded with charges of carbide and water and when the wearer of the cap is using pick or shovel or other tools, imparts very appreciable strains or stresses tending to cause the lamp to move away from the carrier 3. These stresses will, in time, gradually bend the tongue 6 outwardly so that the clamping pressure on the strap 4 is eliminated. The tongue 6 must then be bent back to the initial position and because of the spring metal, such as hard or semi-hard brass, of which the member 8 is composed, this bending requires the tongue 6 to be flexed until it lies in contact with the opposed arm. It will then spring back to substantially the initial position to effect the clamping pressure on the strap 4.
Obviously, the width of the tongue 6 will be substantially the same as the width of the space in which it is to be received.
It will be apparent that the space for re- Y ceiving the tongue 6 constitutes a female formation and the tongue( 6 a male formation. On the other hand, the space between the tongue 6 and the other arm of the member 8 may be said to constitute a female formation to receive the middle portion of the strap 4 as the male member. Obviously the positions of the interengaging formations may be reversed in that the strap 4 may be mounted on the lamp and the member 8 on the cap within the definition of some of the appended claims.
If desired, the member 4 may be provided with perforations 1l into which the heads of the rivets 9 may spring and engage to provide the equivalent of a snap-latch interengagement when the tongue 6 exerts its normal spring pressure upon the member 4.
I claim as my invention:
1. A miners cap member and lamp member equipped with interengaging devices comprising a flat pocket formation on one of said members constituting a female formation, a
' tongue on the other member constituting a male formation, one of said formations being flexible and provided with perforations and projections axially aligned with said perforations for coaction'with the perforated formation substantially as set forth.
2. In a cap and lamp, interengaging male and female formations including a Hat pocket formation on one of said elements and a U- shaped flexible sheet metal member on the my hand.
other element having a free arm adapted to A engage in said pocket formation, said free arm tbeing provided with perforations and button-head rivets securing the other-'arm secured to the element carrying the same, said rivets axially aligned with said perforations and adapted to bear upon one face of the wall of the pocket formation as said free arm f bears upon the other face of the same. i
3. A convenitional miners cap provided between the ends. of the substantially vertical portion of its lamp carrier with a transverse strap of sheet metal having its middle portion spaced from the carrier to form a substantially rectangular at pocket, an inverted U-shaped member having one of its arms secured to a lamp to be mounted on the cap and a free arm for engaging in said pocket, there being perforations in said free arm and