US178391A - Improvement in microscopes - Google Patents

Description

c+. WALE.

MLCROSCOPE.

No.178,391. Patented June 6,1875`- lummwwmm I i B' ATTORNEYS.

MPETERS, PHOTQJITHOGRAFHER, WASHINGTON. n C.

UNITED STATES PATENT FFICE.

GEORGE WALE, OF FAIRVIEW, NEW JERSEY.

IMPROVEMENT IN MICROSCOPES.

Specitication forming part of vLetters Patent N o. 178,391, dated June 6, 1876; application led April 25, 1876.

To all whom it may concern Be it known that I, GEORGE WALE, ot' Fairview,Bergen county, and State of New Jersey, have invented a new and Improved Microscope-Stand, of which the following is a speciiication In the accompanying drawing, Figure 1 represents a top view; Fig. 2, a vertical longitudinal section on line C C, Fig. l; Fig. 3, a bottom view ot' my improved microscope-stand. Fig. 4 is a detail horizontal section of the adjustable vertical pillar of the same on line X X, Fig. 2. Fig. 5 is a detail bottom view of the guide-ring of the object-holder, and Fig. 6 a detail side view of the adjustable light-regulator.

Similar letters of reference indicate corresponding parts.

My invention relates to an improved microscope-stand, by which the object-glass may be adjusted to greater or less distance from the object without being disturbed in the least, or thrown out of its accurate vertical position, and by which the greater or lesser intensity of the light may be regulated and set to various conditions of the object in a simple and convenient manner.

My invention consists, rst, of the mechanism for the minute vertical adjustment of the object-glass secondly, ofthe adjustable ringframe and socket, and, lastly,of the variable light-admitting aperture of the same.

In the drawing, A represents the horizontal arm, to which the objectglass is attached. The arm is screwed to a vertical pillar, B, of triangular or other shape, that slides in a guidecasing, B', for vertical adjustment. The casing B' is secured, by a bottom screw bolt and nut, a, to the lower horizontal arm A', that is secured in a suitable manner to a post, stand, or other support. The lower arm A' supports, in a rin g-shaped frame, C, the detachable ringframe and socket D D', to which the lightregulating device E is applied vertically below the object-glass. The upper arm A is adjusted in vertical direction by a spring-andscrew mechanism, at the inside ot' the triangular pillar, in such a manner that the objectglass is moved accurately in vertical direction without any axial'displacement.

The varying position of the common objectglass to one side or the other of the vertical axis, by the common set-screw mechanism, forms one of the principal and annoying inaccuracies of the microscopes in use. To overcome this defect, and adjust the glass, without the least deviation, nearer to or farther from the object, as required, the pillar B is centrally bored out, and a stationary sleeve or tube, b, made in one piece with the binding-bolt a, placed inside ofthe same. An interior screw-thread at the upper part of tube b serves to raise or lower the setscrew d, that bears on a smaller rod, e, with conically-taperin g ends, which bears again on a rod, f, sliding loosely in the bottom part of the tube, and pressing on a horizontal and guided cross-pin, f', at the lower part of the pillar B', said cross-pinf' moving in a slot, a', of

the lower part of the binding screw-bolt a.

, A spiral spring, g, is inserted between the lower part of the pillar B and the upper arm A, so as to extend around the tube or sleeve b in the small space between the same and the somewhat larger cylindrical boring of the pillar. v

When the set-screw d is turned in one direction, so as to screw into the tube b, the

pressure ofthe same is transmitted, with the least possible friction, by the pointed rod e and rod f, to the lower part of the pillar, so as to lower the same and compress the spiral spring.

When the set-screw is unscrewed the pressure on the lower part of the pillar is released, and the same compelled to follow the action of the spring, so that a positive motion of the upper arm in vertical direction, without any lateral displacement, is produced.

rlhe ring-shaped frame C (shown in detail in Fig. 5) serves to support, on an annular recessed rim, h, and a sliding spring-bolt, h',tl1e detachable rin g-frame and socket D'.

The ring frame D has three or more downward-projecting shoulders, i, that project over the under side of the rim of frame C, andare introduced from above through corresponding recesses i' of the rim, -to slide them along the same until they may be engaged by bolt h1 and set-screw h2, turning in bottom lugs h3 of frame C. The action of the set-screws, in connection with the spring-bolt, admits the moving of the ring-frame a short distance to one side or the other, so that the illuminating apparatus may be brought readily into the eX- act position required by the object-glass. The socket D' is also detachable from ring-frame D, being introduced from below by recesses l ot' the circumferential iange l, past the lugt' ot' the spring-bolt, and a set-screw, Z2, ot' the rin g-i'rame D, being carried by a slotted hookshaped handle between set-screw l2 and ringframe D, to be then secured to ring-frame D. The conveXly-raised center part of socket D' has a perforation for the admission of the light from below. The light-regulator E is screwed into ,the lower` part of socket D', and retained thereinl by a small screw-pin, a, that engages a smooth annular recess n' of the regulator i lato'r in the screw-socket within a small but fixed distance. The upper part of the lightregulator E is constructed of a number of narrow spirally-overlapping elastic blades, 0, as shown in detail, Fig. 6, that are, by the turning -forward or backward of the screw-threads, carried against the concave under side of the raised center part of the socket, and thereby either approached jointly toward their comnion center, so as to gradually diminish the round aperture formed by the same, or they are withdrawn from the raised center part, and thereby allowed to spread by their spring action, so as to enlarge the aperture between the ends of the steel blades. Abottom flange or rim, p, of the regulator E serves to turn the same, and either diminish or enlarge the aperture of the blades, so as to control the passage of the light, and throw a smaller or larger body of light on the object, as required.

The adjustment ofthe light-admitting aperture of the regulator, in connection with the adjustability of the socket-frame of the same, admits the throwing of the light in a more or less intense manner on any desired part of the object, and facilitates thereby the observations of the microscope, while producing more accurate results with less fatigue to the observer.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination, in a microscope-stand, ot' the hollow vertically-guided pillar, supporting the horizontal arm, with a Xed central sleeve or tube of the supporting-bolt or spiral spring and set-screw mechanism, substantially as herein shown and described.

2. rlhe combination of the fixed interior tube or sleeve of the sliding pillar B by a set-screw, conieally pointed, and a connecting-rod, with a cross-pin of the bottom part of the pillar, and with a vspiral-tube encircling spring, to raise or lower the pillar, as described, substantially as herein shown and described.

3. The combination, with the ring-shaped frame, of the lower arm, having set-screw and spring-bolt, with the detachable ring-frame and socket part of the light-regulating device, having projecting lugs or shoulders to adjust the light-regulating device within the supporting-ring, substantially as herein shown and described.

4. The combination ofthe interior ring-frame D, having lug t' andset-screw Z2, with the detachable socket part D', having recesses Z1 and handle-hook m, substantially as herein shown and described.

5. The lightregulator, composed chiefly of a series of elastic blades, in combination with a socket for causing the blades to convergein the form of a cone when the regulatoris suitably adj usted for the purpose, as shown and described.

6. The socket part D', having set-screw fn, in combination with the light-regulator E, having outer screw-threads and intermediate annular recess n', substantially as herein shown and described. e

GEORGE WALE.

Witnesses:

T. B. MosHER, ALEX. F. ROBERTS.

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