US1573420A - Electric fixture - Google Patents

Description

Feb. '16 1926; P. D. PHILLIPS ELECTRIC FIXTURE Filed June 5, 1922 Patented Feb. 16, lfiZfi.

1 UNITED STATES PATENT OFFICE.

PAUL I). PHILLIPS, OF ELMHURST, ILLINOIS, ASSIGNOR TO BENJAMIN ELECTRIC MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

ELECTRIC FIXTURE.

Application filed June 5, 1922.

To all whom it may concern:

Be it known that 1,,PAUL D. PHILLIPS, a citizen ofthe United States, residing at Elmhurst, in the county of Cook and State of Illinois, have invented new and useful Improvements in Electric Fixtures (Case 555), of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

My invention relates to electric fixtures and while it may be used for other purposes it'is especially adapted for use in locomotive cabs to direct the light onto the various indicators and other devices located on the boiler. y

In certain places, such as locomotive cabs, it is necessary to provide a direct concentrated light on certain devices, such as steam and air pressure indicators, oil and water gauges, etc.,and it is of: the utmost importance, for the prevention of accident, that the operators eyes should not be ex posed to the glare from the lighting fixtures. In my invention I have successfully overcome this difiiculty- One of the objects of my invention is to provide an electric fixture embodying a means for preventing the reflected light or glare from reaching the eyes of the engineer or fireman located on either side of the cab.

Another object of my invention is to provide a means for obstructing the reflected light or glare without materially reducing the direct lighting elficiency of the fixture.

Another object of my invention is to provide an electric fixture, for use in locomotive cabs or other places where it will be subject to excessive Vibration, having a mov able glare shield which will be rigidly locked in place when in use, and which may be easily moved when desired to permit the removal or insertion of the lamp.

Further objects will appear from the detailed description to follow and from the appended claims.

In the drawings in which an embodiment of my invention is shown:

Figure l is a vertical longitudinal sectional view of the fixture embodying my invention;

Fig. 2 is a section takenon line 2-2 of Fig. 1;

Serial No. 565,942.

Fig. 3 is a the fixture;

Fig. at is a detail sectional view, of the shield locking means, taken on line H of Fig. 1;

And Fig. 5 is an enlarged view of part of the glare shield.

Referring now to the drawings in detail, the fixture is shown in Fig. 1 in approximately the angular position in which it is usually secured to the ceiling of a locomotive cab in order to most eliiciently illuminate the indicators on the boiler.

In my invention, as illustrated, I provide a substantially parabolic reflector l0, having a neck 11 in which is located the electric lamp socket 12 arranged to hold the lamp 123. The fixture is supported on the bracket 14:, which may be formed at any desired angle, and is secured to the bracket by means of screws 15. The screws 15 also support the socket 12, as shown in Figure 1.

A substantially circular disc-shaped glare shield 16 is located in the opening 17 of the reflector 10. The shield is preferably placed in the open end of the reflector in such a position that its longitudinal plane is on the axial line of both the reflector and the lamp. The shield may be made of any suitable material such as sheet metal or fibre and is preferably of a dull black, but may be of any suitable light absorbing color, and it will be noted that with the shield placed in the reflector, in the vertical position as shown in Fig. 1, it would be impossible for the glare from one side of the reflector to reach the eyes of the person standing on the opposite side.

The shield is supported in place by means of the cars 18 and 19 extending outwardly and upwardly beyond the rim of the reflector as shown in Fig. 1, the car 18 being pivotally supported upon the clamping members 20 and 21 by means of the rivet 22 secured in the ears 23 of the clamping members. The clamping members are interchangeable and are formed to fit the bead 2d on the reflector 10, as illustrated. The clamping members are also provided with the cars 25 and are clamped to the rim of the reflector by means of the thumb screw 26 and the nut 27, the nut 27 being preferably soldered to one of the ears 25.

plan view of the open end of The car 19 is provided with a slot 28 enlarged at 29 and arranged to receive the shoulder 30 on the thumb screw 26 when the thumb screw is screwed into locking position to secure the clamping members to the reflector rim, and it will be noted that by this construction, the shield 16 is hinged on the clamping member 20 by means of the rivet 22, and that when the thumb screw 26 is loosened suflicientiy for'the shoulder 30 to be withdrawn from the enlarged portion 29 through the slot 28, the disc may be swung downwardly and to one side to facilitate the tling or becoming loose, which is an important feature, especially when the fixture is used in locomotive cabs.

As indicated in Figure 2, the lamp and reflector are so positioned and constructed that a substantial portion of the reflected light from the light source 31 is reflected back toward the axis of the reflector as indicated by the rays 82.

While I have described but one embodiment of my invention, it is obvious that it may be embodied in other forms as covered and defined by the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the UnitedStates is- 1, The combination with a lamp and a. reflector surrounding said lamp, of a glare shield, said lamp and reflector being so positioned and constructed that a substantial portion of the reflected light is reflected back toward the axis of the reflector, said shield being substantially flat and lying substantially in an axial plane of the reflector and having an extent substantially just suflicient to intercept all of the rays which are reflected back toward the axis of the reflector, whereby no reflection of the lamp in the reflector will be visible,'said lamp being set well back from said reflector and said shield having a substantial portion inside the reflector and a substantial portion outside the reflector.

2. The combination with a lamp and a reflector surroundlng said lamp, of a glare shield, said lamp and reflector being so positioned and constructed that a substantial portion of the reflected light is reflected back toward the axis of thereflector, said shield being substantially flat and lying substantially in an axial plane or" the reflector and having an extent substantially just'suflicient to intercept all of'the rays which are reflected back toward the axis of the reflector, whereby no reflection of the lamp in the reflector will be visible, said shield being hinged adjacent an edge of said reflector about an axis perpendicular to the plane of the shield to swing out of the way to facilitate the insertion and removal of the lamp.

In witness whereof, I have hereunto subscribed my name.

I PAUL D. PHILLIPS.

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