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Publication numberUS2552112 A
Publication typeGrant
Publication dateMay 8, 1951
Filing dateJun 2, 1947
Priority dateJun 2, 1947
Publication numberUS 2552112 A, US 2552112A, US-A-2552112, US2552112 A, US2552112A
InventorsPierce George M
Original AssigneePierce George M
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Shadow box device for traveling letter signs
US 2552112 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

y 1951 e. M. PIERCE 2,552,112

SHADOW BOX DEVICE FOR TRAVELING LETTER SIGNS Filed June 2, 1947 2 Sheets-Sheet 1 INVENTOR: 650265 Ma @uxee P/eece y 1951 G. M. PIERCE 2,552,112

SHADOW BOX DEVICE FOR TRAVELING LETTER SIGNS Filed June 2, 1947 2 Sheets-Sheet 2 INVENTOR. 650/265 Mc 60/195 P/exece Patented May 8, 1 951 SHADOW BOX DEVICE FOR TRAVELING LETTER SIGNS George M. Pierce, Los Angeles, Calif.

Application June 2, 1947, Serial No. 751,822-

The invention relates to a shadow box device for a traveling letter sign wherein a co-ordinate array of electric lamps are energized by a perforated tape, whereby the message travels across the sign.

An object of the invention is to prevent the sunshine or daylight from renderin the illuminated message obscure. This is accomplished by providing a shadow box for the sign, wherein the sign forms the rear Wall of the shadow box.

Another object of the invention is to provide a shadow box device for a plurality of such signs arranged to form'an enclosure whereby one or another of such signs. may be viewed from any position around the signs.

A further object of the invention is to provide a plurality of such signs, in a unit suitable for mounting on the top of a vehicle such as a bus.

In that case, a more specific object of the invention is to provide an arrangement of signs which take full advantage of the width of the bus while conforming to the requirements of the 3 Claims. (01. 40-129) Vehicle code. Preferably four such signs are employed, one at each side and one at each end of the bus, with each end sign extending the maximum allowable Width of the bus and with the side signs set back from the maximum width,

whereby a cover may be provided to overhang all four of the signs, and fit light shields at the ends of the end signs, with the space between the signs forming an enclosure for the wiring for the lamps. The same message may appear on all four signs or a given message may appear on less than the whole number, and a different message may appear on the others. The wiring for the lamps is preferably ledthrough an outlet in the roof of the bus to the body of the vehicle where an operator may monitor and control the operation of the signs.

For further details of the invention, reference may be made to the drawings wherein- Fig. 1 is a perspective View partly in section and with parts broken away, of a shadow box device according to the present invention as applied to the roof of a bus, one part of the cover being shown open.

Fig. 2 is a top plan view with the cover removed, looking inthe direction'of the arrows 2-2, in Fig. 1.

' Fig. 3 is an enlarged sectional view on line 3-3 of Fig. 2, looking in the direction of the arrows, with parts broken away.

Fig. 4 is an enlarged sectional view on. line 4-4 of Fig. 2, looking in the direction of the ar rows.

Fig. 5 is a vertical sectional view through the ridge of the cover showing a modified form of cover support...

- Fig.1; is a schematic wiring diagram of the tape control for the lamps.

Referring in detail to the drawings, the shadow box device I comprises a rectangular array of four upright signs of which the similar signs 2 and 3 are arranged at opposite sides and the similar signs 4 and 5 are arranged at the opposite ends. These signs form an enclosure 6. Each sign has a coordinate array of electric lamps similar to the array indicated at l for sign 2 and at 8 for sign 5. For example, seven lamps are shown for each vertical row, and the lamps 8 for the end signs 4 and 5 are spaced closer than the lamps l for the side signs 2, 3.

The end signs 4 and 5 are parallel and extend the maximum allowable width of the bus. Sign 5 has a vertical light shield 9 and I0 at its opposite ends, these shields extending outwardly away from the front of the end sign and lengthwise of the side signs 2 and 3. The end sign 4 has similar vertical light shields at its ends, one of them being illustrated at H in Fig. 1 and a similar one l8 at its other end as indicated in Fig. 2. The shield 9 may form an extension of a cornice piece [2 of the sign 2, these parts preferably being of sheet metal, and a similar cornice I3 is arranged between the other end of sign 2 and the sign 4, the shield II and cornice I3 also forming an extension of the sign 2. The sign 3 at the other side has a similar cornice I4 which is extended to form the light shield Ill, and the cornice I5 is extended to form the light shield l6.

As shown in Figs. 1 and 3, the sign 2 is set in from the edge 20 of the roof 2| of a bus 23 and the sign 2 has a base or footpiece 24 which is curved to conform to the curvature of the roof 2|. As shown in Fig. 3, the base 24 may form a continuation-0f the upright sign 2 and these parts as well as the shields 9 and II and the cornices l2 and I3 may be bent to the shape shown, from sheet metal. i

The sign 3 at the other side is similarto Sign 2 and has a base 25, as shown in Fig. 2. The bases 24 and 25 are suitably secured to the top of the bus by means such as screws 26, as shown in Fi 3.

As shown in Fig. 1, at spaced intervals along the center line of the top of the bus are suitably secured to the roof 2|, a number of pedestals in the form of short sections of angle iron like those indicated at 30,' 3|, 32. By using spaced pedestals, the lengthwise curvature of the roof is taken into account. A suitable number of pedestals such as indicated at 30 to. 32 is employed, five being illustrated by way of example. One of these pedestals 32 is shown in Fig. 3 as having a bolt 33 for securing the'lower end-of a cross brace 34 and for securing the pedestal 32 to the roof 2|. The upper end of the cross brace 34 is connected to the upper end of sign 2 by a bolt 35 and this bolt may also hold the bent over end 36 of a rafter 31, of strap iron. The other end of rafter 31 is secured by a screw 38 tothe base of a 'T angle "iron '39 which serves as a ridgepiece for a cover 4|]. The ridgepiece 39 is supported by a plurality of posts like 41, each post arising from one of the pedestals like 32. A cross brace like 34 is secured to each of the J-pedestals like 32, to cross brace the sign 2 and similar cross braces as indicated at 44 are provided to cross brace the other side sign 3.

The cover 40 is preferably made in two sections 4|, 42 and as indicated in Figs. 1 to 3, with a hinge 50 at its longitudinal center. Each section 4|, -42 ris-secured in position by screws like 43 which are threaded into a rafter like 31-.

The cover 40 covers over the enclosure 6 and fits the top of all four of the signs 2 to and fits the top of all four of the light shields 9, I'll, 16. As shown in Fig. 3, the cover 48 slopes in opposite directions from the hinge 50, to shed rain. Also, the cover section 4| overhangs the sign 2 as indicated at 5|, it overhangs sign 5 as indicated at '52 in Fig. 1 and it overhangs the sign 4 as indicated at 53. The other cover section 42 similarly overhangs signs 3, 4, and 5. The cover 49 forms the top of four shadow b'oxes, one for each sign. The cover 49 and the light "shields '9 and -lll form one shadow box to shade the sign 5 and the sign 4 is similarly shaded, their lamps 8 being arranged at the upper portion of the signs as shown in Fig. 4. The sign 2 is shaded by a third shadow box comprising the cover section 4| and the cornices l2, l3. Sign 3 is similarly shaded. This shadow box device reduces the tendency of the sunlight or the daylight 'to obscure the illuminated signs, 2 to 5.

The wiring for the signs 2, 5 may be led from the back of these signs and from the enclosure '6 through an outlet like 30 for each s'ign, these outlets leading into the interior of the bus where the wiring is connected to suitable perforated tape apparatus indicated at 10 in Fig. 6, for producing a traveling message on the lamps of the signs. *As indicated in Fig.6, the four lamps H to 74 represent the corresponding lamps on the four signs 2 to 5, while the lamp represents a corresponding lamp 'on the monitor sign 16 inside of the bus. The operator may, therefore, remain inside the bus and view the sign being spelled out on the monitor sign T6 to see that the tape apparatus 10 is functioning properly.

As shown in Fig. 1-, the shadow box device has a length to overhang the front of the bus, this overhang indicated at 71 being supported by suitable braces 18, 19 which may be omitted if desired.

It is understood that the bus 23 is not used for its usual purpose of transporting passengers, but simply as a vehicle to support the signs and, of course, transport the operator of the bus and an 'operator for the tape apparatus 70. The shadow box device of this invention may be mounted on a stationary support such as a building or it may be mounted on other types of yehicles, such as trailers, boats, airplanes or the like.

In the modifications shown in Fig. 5, instead of connecting the cover sections 4|, 42 by a hinge, their inner-edges may engage in the grooves of a T rail 80 suitably secured on top of the ridgepiece 39, a rubber gasket indicated at 8| and 82 being employed along the inner edge of each cover section to seal against rain. The cover sections 4| and 42 are individually removable and are slid into or out of position, each being held in position by bolts like 43 as previously described. L I

The signs 2 to 5 are preferably straight in a lengthwise direction and while they are indicated as forming a rectangular enclosure 6, other geometrical forms may be employed.

Various other modifications may be made in the invention.

The shadow box design disclosed herein is disclosed and claimed in Des. Patent 152,433, dated January 18, 1949, for Traveling Letter Sign for Vehicles. The control apparatus disclosed herein is disclosed in further detail and claimed in co-pending application S. N. 753,504, filed June '9, 1947 now Patent No. 2,526,829, issued June 9, 1947, for Control Apparatus for Traveling Letter Sigh.

I claim:

1. A shadow box device for traveling letter signs, said shadow box device comprising a substantially rectangular arrangement of upright signs forming an enclosure, each of said signs having electric lamp means forming a message, circuit wiring in said enclosure for said lamp means, two of said signs comprising substantially parallel and comparatively long signs at the side of the enclosure, and the other two of said signs comprising comparatively short signs at the ends of said enclosure, the distance between said side signs being less than the length of said 'end signs and the opposite ends of said end signs extending beyond the front of said side signs, an outwardly extending light shield at the end of each of said end signs for shading said end signs, and a cover fitting over said light shields and having a width to overhang both of said side signs, said cover having a length to cverhang both "of said end signs and cover said enclosure.

'2. A shadow box device for traveling letter signs, said device comprising a plurality of upright signs forming an enclosure, a light shield extending outwardly beyond the front of each endof each of said signs and a cover over said enclosure, said cover fitting on the top of all of said light shields and overhanging all of said signs.

'3. An illuminated sign comprising a plurality of upright traveling letter signs two of which are arranged substantially at right angles to each other, 'one end of one of said signs projecting outwardly beyond the front end of the other sign in position to serve as a light shield for the side of said other Sign, and another light shield member :pro'j'ecnng outwardly beyond the front of said signs at the top thereof to shield said signs from sun or daylight.


REFERENCES CITED The following references are of record in the file of this patent:


Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1728610 *Jul 2, 1928Sep 17, 1929Ellsworth A HortonDisplay device
US1768672 *Nov 21, 1927Jul 1, 1930Longsign CorpElectric sign
US1886341 *Apr 13, 1929Nov 1, 1932Kirk Holding CorpDisplay method and apparatus
US1973276 *Feb 6, 1934Sep 11, 1934Otis L BardVehicle advertising display apparatus
US2270377 *May 21, 1940Jan 20, 1942Nat Display Ads IncAdvertising device
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3152416 *Jul 9, 1962Oct 13, 1964B R Oster CorpSign construction for attachment to the side, rear or front of the roof of buses, streetcars and like vehicles
US4325062 *Dec 6, 1979Apr 13, 1982Vultron, IncorporatedMonitor for bus destination signs
US4453350 *Jun 4, 1982Jun 12, 1984Schantz & Sons, Inc.Marquee for concession stand trailers
WO1981001760A1 *Nov 20, 1980Jun 25, 1981Vultron IncMonitor for bus destination sign
U.S. Classification40/452, 40/591
International ClassificationG09F21/00, G09F21/04
Cooperative ClassificationG09F21/04
European ClassificationG09F21/04