|Publication number||US2520445 A|
|Publication date||Aug 29, 1950|
|Filing date||May 17, 1948|
|Priority date||May 17, 1948|
|Publication number||US 2520445 A, US 2520445A, US-A-2520445, US2520445 A, US2520445A|
|Inventors||John W Sponsler|
|Original Assignee||John W Sponsler|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (3), Referenced by (12), Classifications (13)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Aug. 29, 1950 J. w. sPoNlsLER MODEL RAILROAD SIGNAL Filed May 17, 1948 INVENTOR.A
Patented Aug. 29, 1950 UNITED STATES PATENT: FFICE l 2,520,445 Y l I MoDEL RAILROAD SIGNAL John W. Sponsler, Lewisburg, JE'a.,l
Application May 1'7, 1948, Serial No. 27,543
My present invention relates to an improved model railroad signal of the type conventionally employed wherein a circular plate is mounted for Visibility upon a standard and formed with a vertical and horizontal row of apertures to be illuminated to show a vertical line or a horizontal line and the selection of the line to be lighted according to my invention is made by manual actuation of a device to effect a change in polarity of the light rays so that one set of rays will illuminate o-ne line to indicate one signal position and the other set of rays will illuminate the other signal position from a single light source.
The use of my invention will eliminate the requirement for many bulbs and intricate wiring and it will be obvious that while I describe my signal as applicable to model railroads it is not limited thereto and may be applied to full size signals on railroadsy and for other purposes.
In the accompanying drawings I have illustrated one complete example of the physical embodiment of my invention according to the best mode I have thus far devised, but it will be understood that various changes and alterations may be made in the exemplified structure within the scope of the appended claims.
In the drawings:
Fig. l is a front elevational View of the device of my invention through a section of a base upon which it is mounted.
Fig. 2 is a longitudinal vertical sectional view thereof.
Fig. 3 is a partial side elevational view, enlarged, of the signal plate and reflector.
Fig. 4 is a sectional view at line 4-4 of Fig. 2.
Fig. 5 is a sectional View at line 5 5 of Fig. 2.
Referring now to the drawings, I have illustrated the present preferred embodiment of my invention as mounted upon a platform 2 as conventionally used for model or toy railroads. A base 4 for standard or post 5 is suitably secured and this post is provided with the usual ladder 6 supported by brackets v8.
Upon the upper pair of brackets I secure a reflector Ill having spaced angularly disposed faces I2 and the upper support-face i4 all angled to receive and reflect light rays from below, horizontally forward. On the support-face I4 and vertically depending therefrom and in aligned position in front of the reector I employ a disk or plate |16 having a central opening or aperture I8 and diametrically arranged pairs of apertures 20 and 22.
The pairs of apertures may be respectively covered with red and green filters if desired the red showing a horizontal line and the green a vertical line when illuminated. The apertures are provided with transparencies of polarized film 23, the red for instance responsive to horizontal rays and the green to vertical rays.
At a point below the reflector and apertured disk and slightly forward thereof on the platform I provide an opening or cutout 24 and below this opening and spaced therefrom I secure a housing 26 supported at 2l for light bulb 28 aligned with aperture 30 and secured in bracket 32 in contact with the electrical connector 34 in a suitable electric circuit.
Pivoted at 36 on the under side of platform 2 I secure a bar 38 having an arcuate arm 40 thereon formed with apertures and two transparencies therein, one -42 passing vertical light rays and the other 44 passing horizontal light rays.
A cord 4B secured to extension 48 permits the operator to pivot the bar against the tension of spring 5l] and it will be clear that the bar is moved to position selectively either of the transparencies 42 or 44 over the light bulb 28 to select the row of colored signal apertures to be illuminated.
Thus with a single bulb and its simple wiring circuit the operator may with facility control the signal and effect a realistic simulation of conventional signal towers.
Normally the center aperture is not covered with polaroid film and will respond to light rays from either aperture 42 or 44.
Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is:
1. In a model railroad signal, a, horizontally- :disposed platform, a base secured to said platform, a vertically-disposed post having its lower end secured to said base, a reflector provided with a plurality of angularly-disposed faces and supported by the upper end of said post, a verticallydisposed disc spaced forwardly of said reflector and supported by said post, there being an opening arranged centrally in said disc, said disc having a plurality of apertures spaced about said opening, a transparent polarizing film arranged yover each of said apertures, and said films being differently colored to provide correspondingly different signals, a light source mounted below said platform, there being a cutout arranged in said platform adjacent said base for the passage therethrough of two groups of polarized light rays from said light source, and one group is polariaed in one plane, while the other group is polarized in a plane substantially at right angles to said one plane, a bar pivotally connected to said platform, an arcuate arm carried by said bar, there being a pair of spaced apertures arranged in said arcuate arm and mounted for movement into and out of registry with said cutout, and a transparent polarizing film arranged over each of the apertures in said arcuate arm,
and the planes of polarization correspond respectively to the planes of polarization of said groups of light rays and the opening that is centrally arranged in said disc is free of said lm to permit the light rays from each group to pass` outwardly of said opening to provide a somewhat 15 continuous line of light rays in either plane.
2. The apparatus as described in claim 1, and further including a. manually-operable means for pivotally moving said bar.
JOHN W. SPONSLER.
REFERENCES CITED The following references are of record in the le of this patent:
UNITED STATES PATENTS Number Name Date 1,802,459 Caruso Apr. 28, 1931 2,165,974 Land July 11, 1939 2,238,207 Ames, et a1. Apr. 15, 1941
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US1802459 *||Mar 4, 1927||Apr 28, 1931||Lionel Corp||Mechanical movement|
|US2165974 *||May 20, 1938||Jul 11, 1939||Polaroid Corp||Display device employing polarized light|
|US2238207 *||Nov 6, 1937||Apr 15, 1941||Dartmouth College||Testing eyes|
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|U.S. Classification||446/485, 345/32, 345/697, 446/436, 362/293, 246/484, 362/296.1, 362/19, 246/473.00A, 359/491.1|