US917097A - Lens-measuring instrument. - Google Patents

Description

' A. H. MIGIIELSEN. LENS MEASURING INSTRUMENT. ArPLIoATIoN FILED SEPT. a, 190s.

917,097. Patented Apr.6,19o9;

,61. www? "vri r hanmail@ Elaine LENS-EZEASURNG INSTBWCIENT.

no. enges-'7.

Application led September 8, 1968.

i all tri/tom 'it may concern.'

it known that ANTON l. MicnnnsEN, a citizen ol' the United States, residing at Chicago, county ol' Cook, and State ol lllinois, have invented certain new and uselul improvements in Lens-llleasuring instrudents, ol' which the following is a fpoci'licfm tion.

My invention relates to improvements in lens-'measuring instrun'ients, the object being to construct an instrument by the use oi' the local length ol cylindrical and spherical lenses may be obtained by direct reading ol' a suitably graduated dial.

A further bjcct is to provide a mechanism which n'iay be readilu secured in an ordinary I fch-c ier ohjects will appear hereinafter. My invention consists certain details ol' Atruction and arrangements ol parts all will be hereii'iai'ter l'ully described and particularly pointed out in the claims.

My invention will be more readily' understood by rele-rence to the accompanying drawings l'orining a part of this specification, and in which,

Figure l is a perspective view ol my iinproved device having the general l'orin oi a watch, `Fig. 2 is an elevation with the crystal and dial removed showingI the movable parts Oi' the mechanism in their normal positions, Fig. 3 is a similar view showing the positions oi" the movable parte when acted upon by a lens, and Fig. Ll is a detail elevation.

Referring now to the drawings, l indicates an ordinary watch-case and Z the crystal thereol. A block 3 is inserted in one side of the case l and secured by soldering or in any suitable manner. The block 3 is tapped to receive threaded pins or points 4, so that either one or both oi" these pins may be adjusted and the pins may be adjusted from the outside ol the case l. By giving one of the pins 4 a slight turn, the whole mechanisni may be adjusted so that the dial pointer will register' accurately. The movable point 5 is slidably mounted in the block 3 and is normally in the outermost position as shown in Fig. 2. rlhe point 5 is provided with a head 7 which at all times engages a lever S. Tf Y 1 f. y Y A When depressed by a lens o the nead 7 integral with the point 5 nieves the lever 8 which is pivcted on a screw Q. iin upwardly eX- tending lip 10 is provided on thelever 8 to Specification of Letters Patent.

f engage the head 7.

with and rotates a segment-gear ll, and the Patented April 6, 1909.

Serial No. I251,950.

The lever 8 contacts latter meshes with and rotates a pinion l2. The dial pointer 13 and the pinion l2 are secured to the saine central arbor i4. rlie hair-spring l5 is connected to the arbor 14 in the usual manner and to the bridge 16 by nie-ans olA the pin 17 The bridge lo is secured in the case l by means ol' the screw i8, and is broken away to expose the pinion i2. The block 3 is provided with a downwardly curved portion 19 which 'l'orins a stop to hifiiit the Vmovennent ol' the lever 8 in one direction and the end 2O ol' the gear il lornis a stop to abut the lever 8 and limit its movement in the opposite direction.

The segment-gear l l 1`s provided with a tail piece ll/ having a cam-surface 21 generated upon its edge-into suoli a forni as to cause the dial pointer 13 to register uniformly on the dial when said cam-surface is acted upon. by the lever S. The segment-gear l] is pivoted on the screw 22, and its two eX- treme positions are shown in Figs. 2 and The lever 8 is slightly curved throughout its length and its free end S is turned sharply inward to engage the cam 2l and to arch over the end 2O of the gear to permit suiiicient movement of said gear.

The case containing the crystal 2 may be snapped over the ilange 23 as in the usual construction of watch-cases. A ca 24 is provided to protect the points l an 5, and is adapted to press securely over said points.

While l have shown what l deem to be the preferred form of my device, l do not wish to he limited thereto, as there might be many changes made in the details of construction and arrangement of parts without departing from the spirit of my invention.

Having described my invention what l claim as new and desire to secure by Letters Patent, is:

l. ln a lens measure, in combination with a suitable oase, relatively lined and movable pins mounted in said case, a curved lever suitably pivoted in said case and adapted to be engaged and moved by said movable pin, a segine1it-gear in the saine plane with said lever and provided with a tail-piece having a cani-surface, the free end oi said lever being turned inwardly to engage said cam-surface and clear said gear and adapted to rotate the saine, a pinion meshing with said gear, a dial pointer securely connected with said pinion,

and a suitable spring for yieldingly holding the parts in normal position, substantiallyv as described. v

2. In a lens measure, a oase in combination with a pair of Xed pins and a movable pin mounted therein, a pivotally mounted lever, said movable pin engaging said lever, a segment-gear having a tail piece, the free end of said lever being turned inwardly to engage said tail' piece and to aroh over said gear, a pinion meshing with said gear, a dial ointer movable therewith, a spring for yie dingly holding the parts in normal position, a stop for limiting the movement in one direction and one end of said segment-gear Constituting a stop to engage said lever and limit its movement in the opposite direction, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ANTON II. MICI-IELSEN.

I/Vitnesses:

JANET E. HOGAN, ANNA L. EKVALL.

Images