US174457A - Improvement in stereoscopes - Google Patents

Description

PATENT( OFFICE.

'JO'HNPAGnINenLoF New xonk, N. Y., AND JonN Anni'ro, 0F HOBOKEN, Ij NEW .mesma ,INSTEREoYsc'cPEsQ New York,l "and JOBNARDIrQ., of Hoboken, g

Hudson. Ycounthew Jersey, have invented a f illewand-usefl Improvement in StereoSCOpeSg ,ofwhichthefollowing.isaspecilication:

vFigure Y 1 is a` side kview of' our improvedf ,stereeseope showing the'zpillar in. centralsection; E Fig. 2isaverticalcross-section through -thejoint ofthe .haudlexor 'Pillar at the bottom of the instrument. Figiisy ,a detail top view of the'spring-slide before ther same is applied tojgthe:base-plateofthe instrument.' Fig. 4' is avertical transverse section on the line c 7c, Fig. l; Fig. 5, a transverse section ofthe same on the' line c @Fig-L3. Fig.u6 is a detail side view of the lowerpart ofthe pillar. Fig.` 7 lis a vertical section thereof, showing the legs folded down. Fig. 8 is-a horizontal section on the line k k, Fig. l.

Similar letters of reference indicate corresponding parts in all the figures.

This invention has for its object to simplify the construction of the slide ot' aA stereoscope, and to dispense with the use of separate friction-springs; also to improve the construction ofthe swivel-joint at the bottom of theinstrument, and the mode of attaching the legs to the pillar.-

The invention consists of the improved con. struction and combination of parts hereinafter more fully described.

The letter A in the drawing represents the supporting-pillar of the stereoscope. B B are the legs which support said pillar. C is the base-board of the instrument, swiveled to the upper end of the pillar or of the handle D,

which constitutes'the upper extremity of said pillar. E is the lens-holder affixed to the board C, and F is the extension-slide or picture-holder.

i The general disposition of the parts hereini Specificationformingpartof,Letters Patent Nodl'llgls, datedv Marcl1 7, 1876.; application filed f1 l yFebruary8,1876. v'

Aformed either byy grooving ythe surface of the yboard alongand parallel with its edges, or by aflixing thereto metallic or other strips that project beyond the surface of the board. The

jaws b bfit over and partly around said ledges, and `areheldand. guided by, the same,` the `gripe ofthe jaws on theledgesbeing suflicientlyfirm to enable ,us to dispense with separate .frietion-sprin gs, 'now' usually employed.' 'Additional springis or may be obtained by so ybending the side bars a a inward on the cross- .bar e, fromjwhichfthey project', and as ,indicated'in Fig. 3, that they will be'afterward spread-bythegboard C, which they straddle,

`and caused to exert/spring-pressure against the` edges of .thesame To this endwe `find it advantageous to construct the two side `bars a a in one piece witha ltransverse connectingbar,f, whichis screwed to the crossl bar e, and to partly double the back ends of said bars a against said bar f, as shown at g, in Figs. 3 and 5. By this arrangement a iirm connection of the side bars a with the cross-bar e is ob-l tained, and the joint at-the same time made to constitute a stili' spring. But the piece f may, if desired, be made of two or more pieces. end of the board C is used to preventV the entire withdrawal of the jaws b from the board C. To the under side of the board (l is firmly attached asocket, G, of nearly hemispherical form, slotted at the bottom to admit the shank of the ball H, which projects from the handle D or pillar A. This ball H we make of two hemispherical cups, h It, which constitute the upper ends of ilat or nearly liat metallic shanksi i that are secured in the handle'or pillar. The shanks t' t', with their appendages h h, are bent slightly apart, as indicated in Fig. 2, to constitute friction-springs, and cause the ball, which is formed by the cupsh h, to Work'tight'in the socket G. By this means we can dispense with the employment of a separate friction-spring, now usually employed inthe socket. j is a cushion or plate l,of cork, or equivalent material, inserted Within the socket Gr directly above the cups h h, to prevent the latter from playing up and down within the socket. The lower end of the pillar A stands on a plate, I, to which the three A suitable stop applied to the rear.

' lor more legs B B are pivoted by short pins l l, as shown. Beneath the plate I is another plate, J, which connects, by a central pin, m, with the body of the pillar, and which has as many notches n n as there are legs B B, and equally spaced as said legs. J is turned below the plate I, Ato bring its notches n directly beneath" the upper pivoted parts of the legs B, as in Fig. 7, the legs will, on their pivots, swing inward, as indicated by dotted lines in Fig. 7, and are then in convenient position for packing and transport-ation.

But when the instrument is to be set up,'the legs are spread out, as in Figs. 1 and 6, and the plate J then turned to bring its nonnotched portions under the\pivoted parts of the legs, thereby locking them in their spread and supporting position, as in Fig. 1. The

pin m projects from the plate J, through a central aperture ofthe plate l, and thence `into the pillar A, to which it is lockedv by a 4transverse pin, o, or equivalent fastening.

the end of the opposite turnthe plate J will properly lock the legs in the extended position. By withdrawing the piu o the parts A, I, and J, can be taken apart.

We claim as our invention- When the plate 1. In a stereoscope the sliding side bars a a rigidly connected with the sliding jaws bb, which are adapted to lap around the edges of the board C, along which they slide, substantially as specified.

2. The board G of a stereoscope made with the projecting parallel ledges d to be embraced by the jaws I on the slide-bars a, substantially as herein shown and described.

3. In a stereoscope the side bars a a, made with the laterally-projecting portions g g,which serve as spring-supports of said bars on the connecting cross-piecef, substantially as herein shown and described.

4.'. The combination of the handle or pillar of a stereoscope with the two projecting metallic blades z', and with the hemispherical cups h and h, which are formed on the upper ends of said blades, respectively, substantially as herein shown and described.

5. The combination of the pillar A with the plate I, which carries the pivoted legs B B, and with the movable plate J which has the notches fn, n, substantially as herein shown land described.

6. The combination of the pillar A with the plate I, legs B, notched plate J, center pin m, and locking-pin o, substantially as herein shown and described.

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