US432914A - Map-case - Google Patents

Description

I 3 Sheets-Sheet 1. TERRELL & H. M. OHITTENDEN.

(No Model.)

MAP CASE.

Patented July 22, 1890.

WITNESS-ES A TTOHNE rs (No Model.) 3 Sheets-Sheet 2.

C. M. TERRELL & H. M. OHITTENDEN. MAP CASE.

No. 432,914. Patented July 22, 1890.

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THE nemus PETERS c.

(No Model.) 3 Sheets-Sheet 3. C. M. TERRELLKE H. M. GHITTENDEN.

MAP CASE.

N0. 432,914. Patented July 22, 1890.

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WITNESSES UNITED STATES PATENT OFFICE.

CHARLES M. TERRELL AND HIRAM M. CIITTTENDEN, OF OMAHA, NEBRASKA.

MAP-GAS E.

SPECIFICATION forming part of Letters Patent No. 432,914, dated July 22, 1890. Application filed January 29, 1890- Serial No. 338,487. (ll'o model.)

To all whom it may concern.-

Be it known that we, CHARLES M. TERRELL and HIRAM M. GHITTENDEN, both of Omaha, in the county of Douglas and State of Nebraska, have invented a new and Improved Map-Case, of which the following is a full, clear, and exact description.

This invention relates to improvements in apparatus for the retention in good form and facile exhibition of maps, engravings, plans, drawings, or other similar articles which may be flexibly mounted, the objects being to provide a compact, convenient, substantial, and shapely device of the type mentioned, where by maps or other imprints or delineations may be mounted therein and moved so as to be viewed when desired, and also be secured from dust, accident, or improper handling.

To these ends our invention consists in the provision of a suitable receptacle or case having a transparent front, two rollers therein mounted revolubly at proper distances apart and in parallel pl'anes,and a web of flexible material wrapped 011 the rollers and adapted by 2 5 simple mechanism to be transferred from roller to roller reciprocally, thereby exposing any design, map, engraving, or like article to View as it is drawn before the transparent face of the receptacle or case.

0 Our invention further consists in the peculiar construction of mechanism preferably employed to revolve the transfer-rollers and move the flexible material which displays the imprints or designs mounted thereon in either 5 direction of reciprocal travel by the use of a single crank-lever.

Our invention further consists in the construction of parts and their combinations, as will be hereinafter described, and indicated 40 in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

5 Fig. 1 is a sectional front elevation of the casing, taken on the line 1 1 in Fig.2. Fig. 2 is a sectional side elevation of the same, taken 011 the line 2 2 in Fig. 1. Fig.3 is an enlarged vertical longitudinal section of the lower transfer-roller and attached parts, taken through the axis of the roller. Fig. 4 is an enlarged end view of the lower transfer-roller and the parts employed to rotate the roller. Fig. 5 is an enlarged end view of the transferrollers opposite to that represented in Fig. 4, showing a brake device in connection therewith. Fig. 6 is an enlarged detail front View of. the lower portion of the crank-arm, which is employed to revolve the transfer-rollers, ratchet-gear actuated by said crank being also shown. Fig. 7 is an enlarged sectional side elevation of the portion of the operating mechanism shown in Fig. 6. Fig. 8-is a sectional plan view of the device as applied to a table, taken on the line 8 8 in Fig. 9, and Fig. 9 is a sectional side elevation of the same, taken on the line 9 9 in Fig. 8. i

The casingA, wherein the moving and mapdisplaying devices are contained, may be an upright cabinet,- as shown in Figs. 1 and 2, or a table with a transparent top may be used as a receptacle, as shown in Figs. 8 and 9.

The mechanism which is placed in the upright cabinet or in a horizontal table being identical in form, a detailed description of its construction as applied to the upright cabinet will answer for both.

A represents the upright casing or cabinet, in which is placed the mechanism adapted to support and move maps or other similar arti- 8o cles to exhibit them. Said cabinet A is preferably made of hard wood neatly finished with any preferred ornamentation of its exterior. The upright portion of the cabinet is rectangular in cross-section, and is mounted upon a lower forwardly-proj ected base-box, in which sliding drawers are placed for the reception of books or other material.

As it is desired to expose the interior of the cabinet from the front and yet protect the 0 same from dust or improper intrusion, a single door that is glazed, of a size to expose the major portion of the cabinet-front, is hinged to one side thereof and folded toward the other edge to open or be secured, thus affording ac- 5 cess to the interior and means toprevent the same.

The cylindrical rollers B B are respectively located in the'upper and lower portions of the casing A, preferably in the same plane and parallel to each other, said rollers being transversely and loosely supported to revolve by engagement of their axial projections with the bracket-boxes Z), as will be more fully eX- be described.

plained. The rollers B B are constructed of an equal and proper diameter for their use, each being composed of two metallic skeleton heads 0 c, that are furnished with spaced radial arms, which are integral with center hubs and circular rims c whereon the cylindrical shells d are mounted at their ends and secured by any suitable means, the clamps 0 being preferred. The cylindrical shells d of the rollers B B are made of paper-boardhaving sufficient thickness to render them sub stantial, this material being well adapted for the purpose, as it is light and not liable to split or Warp.

At corresponding ends of the rollers B B, on the left side of the casing A, the heads 0' are furnished with radial projections cflwhich afford a shoulder on each roller, against which the ends of the shells cl abut, the outer end portions of the rims 0 being free to receive the impinge of abrake mechanism, which will be described. On the side of the casin g where the brake devices are applied to the rims c of the transfer-rollers B B these rollers are provided with journals Z), which engage the bracket-boxes b. At the opposite or right side of the casing A there is sufficient space allowed between the ends of the rollers B and B and the inner side surface of the casing to admit other parts thereto connected, which will now There is a central projecting journal 6, formed on the head 0 of the upper roller B, on the right-hand end of the same, which is of sufficient length to receive on its body a sprocket-wheel C, which is secured thereon, a sufficient end portion of the j ournal proj ecting beyond this wheel to revolubly engage the bracket-box b, that is fastened to I the inner face of the casing A.

At the axial center of the head 0, on the lower rollerB', a square orifice is made through the hub of the head for the reception of the journal-pinf, which is squared on its inner end of a size to fit the hole in the head, into which it is inserted and secured by adjustment of the set-screw f, through thehub of the head and into the journal-pin f,which is thus held projected in axial alignment with the opposite short journal I), that engages the bracketbox I) on the left side of the casing.

A sprocket-wheel O, of similar form and size with the upper wheel C, is furnished with a preferably integral sleeve g, that is centrally apertured to fit the journal-pin f and revolve thereon, the lower sprocket-wheel 0' being located in the same vertical plane with the upper wheel 0. The sleeve g on wheel 0 is loosely inserted through the side wall of the casingA and outside of the same a proper distance, its diameter being reduced on the projecting end, so as to produce a shoulder which is in alignment with the exterior surface of the casing, and on this reduced cylindrical end a ring h is secured in close engagement with the shoulder mentioned, and thus rotates with the sprocket-wheel G. The ring it has spaced ratchet-teeth out on its peripheral face, which are preferably sloped, so as to present their shoulders h toward an operator standing in front of the casing. The reduced portion of the sleeve g extends beyond the ratchet a distance equal to half the thickness of the crank-hub. At the terminal end of the sleeve g an enlargement in diameter of the pin f is produced, which is thus made equal to the diameter of the reduced sleeve end and of the same length. On the journal thus provided the apertured lower hub end of the crank-lever D is mounted loosely.

An enlargementi is formed on the outer end of the journal-pin f, which is of equal diameter with the ratchet-ring h, and has ratchet-teeth of equal number and pitch formed thereon. These teeth on the head i are sloped in a direction opposite to that of the teeth on the ring h, as shown in Fig. 6, the teeth on the ratchet-head t slanting upwardly away from the operator, who faces the 1 front of the cabinet, while the teeth on the ring it slope upwardly toward the front, as indicated in dotted lines, both gears being broken away to permit an exhibition of them 7 in the same figure.

The hub end of the crank-lever D is trans versely perforated to admit a fulcrum-bolt 071, said pin being of sufficient length to re ceive the duplicate pawls n n that are oppositely mounted on the projecting ends of the fulcrum-bolt.

The transfer-rollers B B have the web E, of flexible material, secured by its ends to the outer surfaces of the same, so that by the revolution of one cylinder it may be wrapped thereon and unwrapped from the other, and the reverse, a suitable length being given to the canvas web E to afford ample space for the exhibition of the maps or other designs thereto secured. The canvas web E is so disposed upon the transfer rollers B B that the portion E, which extends between said rollers, will be located near to the front of the cabinet-door A and lie upon a vertical table A which is preferably made of rigid paperboard that is supported by the transverse battens o, the projecting ends of which engage the side jambs of the door A on their inner surface and are thereto secured, the tablet thus supporting the flexible canvas as it moves or when at rest thereon.

The sprocket-wheels C C are adapted, from the shape of their spaced projecting teeth,to interlock with the chain 0 that is placed thereon and transmits motion from the lower roller to the upper one by revoluble movement toward or from the operator when he actuates the crank-lever D from the front of the cabinet.

The construction of the lower roller B and 7 other parts where the crank-lever D is connected therewith is designed to provide means whereby when motion is given to one of the rollers through the crank-lever D the other roller is moved in the same direction by tension of the canvas web E, and thus transfers the canvas web E from one roller to the other, affording reciprocal travel to the pore tion which extends between the rollers and lies upon the tablet A To effect this movement of parts, the pawls n n are secured on the fulcrum-bolt m at such an angle of divergence that the toe of one pawl will just clear the teeth of the ratchet it is opposite to when the other pawl is in full engagement with the teeth it is adapted to mesh with, and as the slope and length of the teeth on the ratchet-ring h are the same as those on the ratchet-head 1', their direction of slope on the teeth being the sole difference, it is evident that the movement of the handle or cranklever D toward the operator will draw the canvas down, and the reversed motion of said crank-lever will move the canvas web upwardly. The motion of the crank-lever D turns directly one cylinder alone, the other being moved by the Web E, the direction of motion being alternated and the revoluble movement of the rollers changed by peculiar mechanism,hereinbefore described. This device, when one pawl is in full engagement with opposing teeth on the ratchet ring or head permits the other pawl to be automatically released from contact with its mating ratchetteeth and retained so, while the canvas web is essential because of the changing diameters of the rollers as the web winds upon one and unwinds from the other, for in all positions of the Web, except when the same amount is wound upon each roller, the velocity of the rollers is different, and were both pawls capable of engagement at the same time the device would become locked from revoluble' movement.

It is not desired to restrict the construction to the use of sprocket-wheels and a chain, as band-pulleys and a belt may be substituted therefor, preference being given to the firstnam ed device.

As the weight of the canvas-web portion E depends from the periphery of the upper transfer-roller B, the revoluble movement of said roller must be controlled or there will be looseness in the exposed portion that has contact with the tablet A owing to the want of tension. To correct this disposition to wrinkle and draw unevenly, the brake-bars F are provided. These are slightly elastic and have one end of each secured to the side of the cabinet, while the other ends are in frictional contact with the heads 0 c, the tension being adjusted so as to keep the canvas stretched, it being understood that the Web E is drawn taut and closely rolled on the receiving-roller when mounted thereon.

Then the device is to be placed in a horizontal plane, so that the maps or other delineations that are to be incased and exhibited may be viewed, measured, and moved by an operator seated, the receptacle or casing is mounted on four legs and the glass door A given a horizontal position.- All other parts of the device are assigned the same relative positions in the body of the table-cabinet that they have in the vertical cabinet and are 0perated in the same manneiyit being apparent that the reciprocating motion will be from side to side instead of a vertical plane.

Having thus described our invention, we claim as new, and desire to secure by Letters Patent- 1. The combination, with an inclosed rectangular easing, a glazed door therefor, two rollers pivotally supported in the casing parallel to each other, a fixed tablet between the rollers, and an endless web secured byan opposite end to each roller and wrapped thereon, of a band or chain wheel mounted on each of the pivotal supports of the rollers at opposite points, an endless flexible connection on these wheels, which is adapted to transmit motion from one roller to another, a single crankhandle that is used on the journal end of but one roller to revolve either roller as a driver, and ratchet-and-pawl mechanism which will automatically convert either roller into a driver of the other roller when the direction of the crank movement is reversed, substantially as set forth.

2. The combination, with a cabinet having a glazed door, a tablet supported near the door within the cabinet, parallel rollers j ournaled within the cabinet, brakes for said rollers, and a flexible web mounted on the rollers and stretched between them, of sprocketwheels mounted on the shaft-s of said rollers, a sprocket-chain on said wheels, a sleeve and ratchet-ring 011 one of said rollers, a journalpin having an oppositely-cut ratchet-head secured to said last-specified roller, pawls separately and alternately engaging the ratchetring and ratchet-out j ournal-pin, and a cranklever adapted when moved in opposite direotions to reciprocate the flexible web in rear of the glazed door of the cabinet, substantially as set forth.

CHARLES M. TERRE'LL. HIRAM M. OHITTENDEN.

Witnesses:

FREDERICK TERRELL, F. M RICHARDSON.

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