US463660A - George h - Google Patents

Description

(No Modell) G.- H. BATON an J. L. PAT-0H.

vGOLLAIESIB'LB- .UPI-IRA GLASS.

Patented Nov.. 24, 1891.

Irl Je ITI". |:f| YS ejfow THE Noms warms co.. vuoto-mno., mamas-mu. n, c.

`said post or support, whereby the lens-hold- UNrrEn STATES PATENT OEEICE.

GEORGE H. EATON AND JOHN L. PATCH, OF BOSTON, MASSACHUSETTS; SAID PATCH ASSIGNOR TO SAID EATON.

COLLAPSIBLE OPERA-GLASS.

, SPECIFICATION forming partof Letters Patent No. 463,660, dated November 24, 1891.

Application led J une 13, 1 8 91,

To aU whom it may concern.

Be it known that we, GEORGE H. EATON an JOHN L. PATCH, both of Boston, county of Suffolk, State of Massachusetts, have invented an Improvement in Collapsible Opera- Glasses, of which the following description, in connection with the accompanying drawings, is a specification, like letters and gures on the drawings representing like parts.

lThi'si'inVentiOn has for its object to improve the construction of collapsible operaglasses.

Our invention comprehends the employment of two lens-holding plates and an intermediate plate and flexible tapering tubes, .as cloth or equivalent material, attached to and held by said plates, and a detachableextensible post or support adapted to be interposed between the lens-holding plates, and an .adjusting device for adjusting the length of ing plates may be held at any desired distance apart to thereby change the focus.

Figure l shows in side elevation and vertical section a collapsible opera-glass embodying this invention; Fig. 2, a vertical section of the device shown in Fig. 1, taken on the dotted line fo; Figs. 3 and 4, details to be referred to.

The plate a, made 0f metal andof `suitable shape, has two holes through it,which, as herein shown, are adapted to receive thimbles a', which contain lenses a2, held therein by bushings a. Rings a4 are screwed or otherwise secured to the thimbles a', each of which rings has an upwardly-extended flange a5, over which one end of the tapering ilexible tube b, of cloth or other suitable material, is drawn. A spring-acting ring a6 is placed within each ange a5 ot' the rings aacting to hold the liexible material in placel' The rings a4 are turned on the thimbles until the flanges a5 thereof press the materialrmly against the under side of the lens -holding plate a. The other lens-holding plate e has two holes through it similar to the lens-holding plate a, and in said holes thimbles c are placed which receive and hold the lenses. Rings c2 are screwed or otherwise secured to said thimbles, having anges c3, over which are drawn the opposite ends of the flexible sel-a1 No. 396,103. (No moda.)

tubes b, the material being held inplace by the spring-acting rings c4, andy said rings e2 being turned on the thimbles until the flanges c3 press the material iirmly against the plate c.v

A plate d, placed midway between the lensholding plates a c, has two holes through it like said lens -holding plates a c, which receive the tubular flexible material b, said material at such point being firmly and securely attached to the plated by the wirelike rings cl and the flanged clamping-rings d2.

A detachable eXtensible post or support is interposed between the lens-holding plates a c, passing through a hole inthe plate cl, said post or support being composed Aof the tubular or hollow stem e and the stem e movable telescopically within the stem e. The upper end of the stem c is adapted to lit snugly in a socket e2, attached to the inner or under side of the lens-holding plate a. The stem e is slotted at its upper end, as at 2, to receive a cross-bar 3, secured diametricallyl in the socket e2, to thereby keep the stem e from rotating, and the tubular or hollow stem e has arranged on it eXteriorly at or near its extreme end a`series of ratchet-teeth e3, and a pawl e4 (see Figs. 1 and 3) is pivoted to the inner side of the plate c, the engaging end of which passes through a hole in a boss e5 on said plate and engages one or another tooth of the series of ratchet-teeth e3. A spring e6 is contained in the tubular or hollow stem e, which exerts its force against the stem e.

Amilled-edge wheelf, having a hole through it provided with an internal screw-thread, is held in position on the plate d by a bracket or holder f secured to the under side of said plate d, the central hole of said wheel registering with a hole in the plate cl, through which hole the stern e of the extensible and detachable post e e passes. The stem e has arranged spirally on it projections f2, or said stem may be screw-threaded to be engaged by the'wheel f. The stem e is slotted longitudinally, as at 12, (see Fig. 4,) to receive the projections f2 on the stem e', as said stem -is withdrawn or pressed into the hollow stem e against the tension of the spring c6.

The extensible post or support e e", it will be seen, is readily detachable, and when detached the three plates a, Land c are con- IOO nected only by the flexible tubes I), and may therefore be brought together and lmade to occupy but little space. The detachable post or support is inserted by passing it with its stem e foremost through the holes in the plates c d and into the socket e2 of the plate a, and at such time the plate or holderf, which supports the wheelf, will bear upon the upper end ofthe tubular or hollow stem e and draw the tubular material between the plates c d substantially taut. Then by rotating the wheel f, which it will be understood serves as the adj usting-wheel, the stem e may be moved in either direction at will. As the stem e is moved outward it acts to separate the plate a from the plate dby bearing against the cross-bars 3 3, and as the said stem is drawn inward it acts to move the platea toward the plate cl by its frictional engagement with the socket e2, assisted, as it usually will be at such time, by the plate ci being held firmly against the face of the user.

The hollow stem, it will be understood, is made of such length that when interposed between the plates c d the flexible material will be drawn taut, and although we have shown a series of ratchet-teet-h adapted to be engaged by a pawl, whereby the length may be slightly varied to compensate for any shrinkage or stretching of the material, it is obvious that any other suitable locking device may be employed.

lt is obvious that the means herein shown for adjusting the parts may be used in combination with other forms of collapsible operaglasses.

lVe do not desire to limit ourselves to the particular means herein shown for attaching the flexible material or tapering tubes b to the plates, as it is obvious that they may be attached in many diiferent ways.

We claiml. In a collapsible opera-glass, two lens holding plates (t c, an intermediate plate d, and flexible tubes b b, rigidly connected to said plates a c d, combined with an adjusting-Wheel f, having a central internally-screwthreaded bore, the holder f for said Wheel secured to the plate cl, and the detachable and extensible post or support comprising the hollow stem e, adapted to hold separated the plates c and d and thereby hold the flexible material between said plates taut, and also comprising the stem e', adapted to engage the plate a and having spirally-arranged projections on it, said stem being embraced and moved telescopically in the hollow stem e by the said adj listing-wheel, substantially as described.

2. In a collapsible opera-glass, two lensholding plates a c and the intermediate plate d, having two holes through it, flexible tubes IJ b, rigidly connected to the plates a c and passing through the holes in the plate d, and fastenings contained within the said tubes h b for securing them rigidly to the plate d at the holes, combined with the detachable and extensible post or support interposed between the two lens-holding plates a c, substantially as described.

3. In a collapsible opera glass, two lensholding plates a c and the intermediate plate CZ and flexible tubes b b, rigidly secured to said plates a c (l, combined with the adjusting-Wheel, asf, a holder for it secured to the plate d, and the detachable and extensible post or support comprising the hollow stem e, slotted as at 12, and interposed between the plates c and cl, and the stem e', having projectionsf2 on it, which enter said slot l2 as Vthe stem is moved longitudinally with relation to the stein e by the adjusting-wheel, substantially as described.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

GEO. H. EATON. JOHN L. PATCH. lVitnesses:

BERNIcE J. N oYEs, EDWARD F. ALLEN.

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