US 1672605 A
Description (OCR text may contain errors)
June 5, 1928. 1,672,605
A. C. DOBRICK MOUNTING FOR WINDSHIELD SPOTLIGHTS, ETC
Filed July 17, 1924 (in n Patented June 5, 1928.
ii-tufran STATES 1,672,605. Pari-:NTg OFFICE.
-AUGUST C. DOBRICK,OF CHICAGO, ILLINOIS. ASSIGN OR TO THETIMPERIALIBRASS MAN- UFACTURING COMPANY, OF'CHICAGO, ILLINOIS, A CORPORATIONOF ILLINOIS.
MOUNTING AIOR KNIN'DSI-IIELD SPOTLIGHTS, ETC.
Application area July 17,
`My Vinvention is concerned with a novelV mounting, designed more. especially for what are known as 'wind-shield spot-lights, and is designedto produce asimple. structure of the class described thancan be cheaply manufactured, andl which `will maintain the ydesired degree of friction in theb'e'aring despite its becoming worn, and whichcloes.nt require any lcareful 'adjustment-5to secure said desired degree of friction'.
Itis further concerned with such a mounting which, when used `lfor a spot-light, will enable it to be quickly and readily removed from the wind-shield so that it can be used as a trouble light.
To illustrate my invention, I annex hereto a sheet of drawings, in which the same reference characters are used to designate identical parts in all the figures, of which,
Fig. 1 is a perspective view of my invention as applied to a wind-shield spot-light, with a portion of the wind-shield broken away; and
Fig. 2 is a central vertical section through the wind-shield and the mounting secured therein.
I have shown my invention as applied to a wind-shield spot-light in which the customary electric bulb is removably secured in the end of the tube'15, whichv has the bayonet slot 14, with which the pin 13 4on the base of the bulb 10 co-operates. The reflector 12 has the sleeve 12a which slips on the end of the tube 15 and is secured in place the set screw 12b. The tube 15 is associated with a ball mounted in the bearing secured in an aperture 16 in the wind-shield 17. The tube 15 will have a suitable handle 18 brazed or otherwise secured on the end thereof, and said handle has a passage 19 therethrough through which the electrical conductors 20 furnishing the current for the bulb'l() can pass. Any desired switch mechanism can be located in the tube 15, as is customary. It will be observed that the largest portion of the handle 19 is smaller in its dimensions than the internal diameter of the clamping ring 21, so that when the ball is released from the mounting, as hereinafter described, the handle can be passed forwardly through the mounting and the apparatus used for a trouble light for as great ra distance as the length of the conductors 20 will permit.
The clamping ring or annulus 21 is pref- 1924. serial No. `726,606'.
'erably formed of the radially-extending flange which engages the wind-shield 1j7 and the laxially-'extending annular flange 22,
ywhich passes through the aperture 16, and "which is externally ."tlireaded. The '.ring.21
is provi-ded on its inner periphery withlthe annular, curved bearing surface 23', preferablyl shaped to fit accurately on'the ball. To clamp ythe ring 21 securely in place'on ythe wind-shield, I employ the'second clamping ring or annulus 24, which is'prefer'ably vof the same character as thering"21,andli's ininner periphery of the third annulus 26, U
which preferably fits loosely inside of the annular flange 22, and which is preferably held in place by the annular nut 27 having its periphery milled for easy manipulation, and also having the inwardly projecting flange 28, which will engage the ring 26 and hold the same firmly in engagement with the ball when the ring 27 is screwed on to its limit.
The ball is preferably formed of two hemispheres, and one of them, 29, is preferably secured on the tube 15, by brazing or otherwise, and is provided with the annular recess 30 therein. The opposed hemisphere 31 is preferably symmetrical with the hemisphere 29, and diers therefrom only in that it is loosely mounted on the tube 15, so that the strong, helically-coiled expanding spring 32 surrounding the tube 15 and placed in the recesses 30 can operate to expand the ring as much as the design of the parts will permit. It will be understood that the spring 32 is stiff enough and of the proper size so that when the ring 27 is screwed up to the fullest extent permitted, the spring 32 will furnish the desired degree of friction between the ball made up of the hemispheres 29 and 31 and the spherical bearing surfaces 23 and 26. By this construction, employing the heavy spring, and properly proport-ioning the parts 22, 26 and 27, the desired degree of friction to hold the spot-light in any position in which it may be placed can be obtained, and substantially the same friction will always exist, irrespective of any wear. that may occur.
The operation `of my invention will be readily apparent. By manipulating the handle 18, the rays of the spot-light can be directed anywhere that may be necessary, and it will be held securely in any position in which it is placed. If it is desired to use it as a trouble light, all that is necessary is to unscrew the ring 27, when the spot-light can be pulled out through the opening in the mounting as far as the length ofthe cord 20 will permit. kIt will also be noted that while it is so used, the rings 26 and 27, while they are loose upon the spot-light, are confined between the reflector l2 and the hemisphere 29, and cannot become lost.
While I have shown and described my invention as embodied in the form which I at present consider best adapted to carry out its purposes, it will be understood that it is capable of modifications.
What I claim as new, and desire to secure by Letters Patent ofthe United States, is:
In an apparatus of the class described, the combination with a ball, of a support having an aperture through which the ball eX- tends, a clamping` 'annulus having a radial`v ly-extending flange and an externallythreaded axially-extending flange and a curved internal bearing surface, a second clamping annulus, threaded on the first, a third annulus having a curved internal bearing surface, and a fourth annulus threaded onto said axially-extending flange and engaging the third annulus to hold it in contact with the ball, said second, third and fourth annuli all being on the same side of aid support and all engaging the first annu- In witness whereof, I have hereunto set my hand this 8th day of July, 1924.
AUGUST o. DoBRioK.