US84398A

US84398A - Improvement in the construction of school-globes

Info

Publication number: US84398A
Authority: US
Publication date: 1868-11-24
Anticipated expiration: 1885-11-24

Description

inf

ling,- drawing, forming part of this speciiication, in which 'manufacture of my globes.

"pasteboardwhich AI use in the manufaetiu'e of my i W i 1. nel ,tetes I- my anni Letters Patent No. 84,398, llavtezlrNorcmlm/r 24, 1868.

IMPROVEMENT IN THE CONSTRUCTION' OF SCHOOL-GLOBES.

The Schedule referred to in these Letters Patent and making part of the same.

To all when?, it may concern: l

Be it knownthat I, EDWARD Wurssnxnons, of Hudson Cit-y, in the county of Hudson, State ot' New Jersey, have invented anew and useful Improvement in School-Globes; and l do hereby declare the tbllow'-, ing to be a full, olea and exact description thereof, which will enable those skilled in the art to make and use the same, reference being,- had to the aeeompanydrawing-.

Figure l represents a central section of the. mould which I use in the manufacture ot' my globes.

-Figure 2 is a central section oi". the globe when 'iin-l ished.

Figure 3 is aplan' of the blanks which I use in the Similar letters indicate eorrespomlingg, parts.

This invention consists in the peculiar manner ot' cutting out the blanks, and of unitinfoY the same, cach hemisphere of the globe being made of two or more circular layers of pastehoard, which are cutout to form a series of radiating arms, with intermediate triangular spaces, and laid, one on'the top of the other, so as to break joints, and that by applying glue or other cement between the two layers, and snhiecting the same to a heavy pressure in a suitable mould, (which may be heated) the several layers are rmly united, and the edges of the various arms are brought together in sue-h a manner that a smooth, strong, and durable hemisphere is produced.l The hemispheres thus produced are turned off true at their edges, and finally united by an internal strip of pasteboard, and then smoothed ott" ready for the maps.

A, iig. 3, represents one ot' the blanks or layers of globes. These blanks I cutout, so that the same form a series of radiating arms, 1-, as shown in tig. 3, and, after the blanks have been` properly prepared, I select two, apply to the surface of one ot' them glue or other suitable cement, place the other on it, so as to break joints, or so that the arms of the second blank will cover the open spaces 'between the arns oi' the firsts; blank, and before the glue or other cement has set, I introduce the two blanks into the mould li.

This mould consists ot' the male part b and the female part e, and either one or both parts are heated by steam or hot air, which maybe introduced through a pipe, d, and exhausted through pipe, c.

After the two layers of pastelmard, prepared as abovedescribed, have heen adj ustedmn'the male part ofthe mould, the female part is forced down by means ot' hydraulic or other powerful pressure, and the two layers of pasteboard are formed into a hemisphere, the edges of the arms fof each layer being, brought close together, and tirmly united to eael'i other by the glue or other cement appliedto one ot' the layers, and by the adjacent arms of the-other laver.

The hemispheres thus tormed are turned oit true at their edges, and, by uniting two such hemispheres, ulohesot' the required kind are produced.

Thel operation of 'uniting the two hemispheres is conducted as tollows: l take a strip, j, of pas'tehoard, glue it fast to the inner surlace ot' one hemisphere, with its edge projecting some distance beyond the edge oi' said hemisphere, and then I place the other hemif sphere over it, always taking care that the whole outer v surl'ace ot' the strip fis well covered with glue or otherj cement. By the strip j, the two hemispheres are tirmly united,` and globos are formed, which are durable, firm,- not liable to leet broken, and which can be produced at a very cheap rate.

lhese globes are prepared for the reception. oi' the maps h v grinding oi`i` theirsnriaoes, so that the same become smooth, and free from all fringes.

Having thus described my invention,

'hat I claim as new, and desire to secure by Letters .Pa-tent, is-

A school-globe, made ot' two layers, A, of pasteboard, eut out to form arms, a, and placed together and united by the aid of the inonld'B, all as shown and described.

Also, the strip f, pasted 'to the inner surface ot' one ',hemisphere, and serving` to fasten and retain the second hemisphere, subshn'ltially as set forth.

EDXV. /'EISSENBORA".

Witnesses Luor. SrEiDnL, E. F. KASTENHUBER..