US1752910A - Device for carrying maps - Google Patents

Description

April 1, 1930.

G. P. KENT DEVICE FOR CARRYING MAPS Filed April 22, 1929 FEM!IlllHIIHIIHHIIIHIlllllll Patented Apr. .1,' 1930 UNITED: STATES PAT-E? GFFiCE- GEORGE PERCIVAL KENT, OF- GROVE PARK, LONDON ,-ENGLAND DEVICE FOR CARRYING MAPS Application filed April 22, 1929, SeriaI No. 357,128, and in Great Britain March 3, 1 928.

Figure 1 1s a face view of said map carrier and; Figure 2 is a section on line 2-2 of Figure 1. r

The numeral 1 designates say a road map of a town made of cardboard or the like. In front of this road map and spaced therefrom is a pane of glass 2 and spaced in front of this pane 2 andparallel therewith is a secondpane of glass 8.

' Pivoted at pomts a: and'y so as to be adapted to swing each in a plane parallel to and be.

tween said panes of glass 2 and 3 are respectiye extensible telescoping rods 4 and 5;. The.

points at and y are above the mapl and say vertically 'in line with the respective ends thereof. At their ends .remote from said pointsae y saidv rods 4 and '5 have handles 6 a0 and 7 secured thereto by which said rods are adapted to be swung as stated. Said rods are adapted always to cross one another as shown. I v

Located betweensaid panes of glass is a lens 8. This lens is of such a thickness as to form an easy fit between the panes and is located between the upper portions of the intersecting rods 4 and 5. Therefore when the structure is at its normal upright position shown, said lens 8 will rest in the upper angle between said rods 4 and 5 at a position determined by the angles to which said rods are set about their pivot points.

Around the two vertical edges and the lower edge of said map and in a plane just behind the pane of glass 2. a line of characters is marked as shown in. Figure 1 said characters in the present example consisting of numerals starting from unity at the top of the left band edge and running consecutively to the top of the right hand edge. It will be seen that so long as the rods 4 and 5 support the lens over the map each rod will cross said line of characters and the position at which the two rods so cross said line will determine the positionof said lens over said map. It may be found convenient to extend the line of numerals a short distance beyond thetWo" ex: tremities of the lower edge of the map as shown. I I

Supported at some convenient position are two framesQ-and 10 hearing a list in alphabetical order of the names of roads and/or other placesshown on the map, each name has marked against'it the two numeralsat which the respective rods 4 and 5 will cross the line of numerals when said lens is over the corresponding place of the map.

'VVhen therefore it is desired to find the position of a given locality or street, the name of thesame is looked'up in the list and the two rods are set to angular positions at which they cross the line of numerals at the respective members indicated adjacent said name. An observation through said lenswill then show anenlarged image of the portion of the map surrounding said street in which portion it is easy to pick out said place or street. V v

In construction the device comprises'two frames 11 and 12 which are identical in face view and have rounded lower corners as shown. Said frames are secured together one in front of the other in spaced relation by means of spacing pieces 13 extending between the frame throughout the full length of the upper frame members and about half way down both side frame members as shown The upper frame members'of said frames-11 and 12 have longitudinal'slots therethrough through which the glass panes 3 and 2 are Slld into place and-theside and bottom frame members are formed with grooves for the reception of the edges; of said panes.

Secured completely around the edge of the structure constituted b said two frames is a strip 14 of sheet'meta said'strip being secured in place after the panes of glass are located. This strip has a longitudinal slot therein at'a position between the two frames whi h 51 1: extends thr ghout all that p tion of the strip 14 which does not cover the spacing pieces 13.

The aforesaid handles 6 and 7 are stamped from sheet metal and have each two lugs 15 which project through this slot and a block 16 mounted at one side thereof which limits the movement of said handles into said slot.

Slidablymounted on said lugs are washers 17 having convex surfaces presented to the metal strip 1 1 and urged by means of springs 18 against said strip. It will thus be seen that said lugs are slidable throughout the whole length of the slot in opposition to a force of friction determined by the force exerted by the springs 18. In practice this force of friction is sufficient to retain said handles at any position to which they are set. Itwill be clear that by virtue of the convex surfaces of the washers 17 said handles are enabled to turn easily round the curved lower corners of metal strip 14. Said handles 6 and 7 are-also formed each with a lug 20 between said lugs 15 this lug is pivoted to the end of the respective rod 4 or 5 remote from the point a or y. The pivotal mounting of said rods 4 and 5 is effected by means of pins 21 mounted on the upper frame member of the frame 12 as shown in Figure 2. The map is mounted on ametal plate 22 removably secured over the back of the structure and the two frames 9 and 10 bearing the list of places are mounted on the structure by means of supporting arms 23 secured to this plate as shown. The list of places extends down bot-l1 sides of each frame and said frames are pivotally mounted as indicated so that their faces may bereversed.

Located immediately behind the glass pane 2 and extending throughout the area thereof surrounding the map is a sheet of cardboard or the like 24 on which may be inscribed advertising matter. Spacing pieces 25 extend between this sheet 24 and the plate 22, which spacing pieces as will be seen also serve to frame the map.

It will be noted that in a map holder and indicator as hereinbefore described, the lens has a circular periphery and is free to move upwardly and downwardly, as well as crosswise, a support therefor being provided by the telescopic cross bars, and said telescopic cross bars notonly serve as a lens support but also cooperate with the scale to indicate locality and movement of the telescopic bars positions the lens relative to the scale.

-What I claim and desire to secure by Letters Patent is 1. A clevice for holding maps comprising a frame having parallel transparent sheets, a pair of telescopic cross bars maintained in pivotal and adjustable engagement with the frame to provide adjacent to their points of intersection a support for a lens.

2. A map holder of the character set forth comprising a frame, a pair of parallel transparent plates and an ofl'set back, a pair of bars pivoted to the frame and constructed to admit of longitudinal extension to serve as supports for a freely movable lens.

3. A map holder comprising a structure having a compartment formed by a pair of parallel transparent plates, a backing plate which is olfsettherefrom to constitute a map receiving chamber, a freely movable lens mounted between the transparent plates, and manually adjustable and extensible bars which provide a support for the lens, said bars being movable to posit-ion the lens both vertically and horizontally.

4. A map holder comprising a frame constructed to maintain a pair of spaced apart transparent sheets of material, and an opaque backing sheet associated with the frame and adapted to maintain a map, a scale on the inner face of the backing sheet, extensible bars pivoted to one of the sides of the frame, each of said bars beingin adjustable engagement with the opposite side of the frame to admit of movement over the scale, and a lens supported by contact with the extensible bars adjacent to the intersect-ion thereof.

5. In a map holder, a frame, a pair of spaced apart transparent sheets maintained by the frame anda backing plate spaced beyond the inner transparent sheet, a scale on the inner surface of the backing plate, a pair of telescopic bars which cross each other, one end of each of the bars being pivotally attached to the frame and the other ends being maintained in slidable engagement with side portions and the lower portions of the frame, and a lens which is adjustably supported by the cross bars. j 1

61A device of the character described comprising a frame which is constructively adapted to maintain parallel transparent sheets and a backing sheet, said frame having at its forward. portion a longitudinal opening, a pair of telescopic bars pivotally secured to the frame, said telescopic bars at their opposite ends engaging adjusting means cooperating with the frame adjacentto its slots, and a circular lens which engages with the telescopic bars adjacent to their points of intersection. e

In witness whereof I affix my signature.

GEORGE PERCIVAL KENT.

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