US1423224A - Iris diaphragm - Google Patents

Description

R. KLEIN.

IRIS DlAPHRAGM.

APPLICATION FILED JUNE 30. 1920.

b 2332 Patented Jul 18, 1921 2 SHEETSSHEET 1.

BY W ATTORNEYS R. KLEiN.

IRIS DIAPHRAGM],

APPLICATION FILED JUNE 30. 1920.

Patented J uly 18, 1922;

2 SHEETSSHEET 2..

IN VENTOR.

JAZX/ATTORNEYS.

UNITED STATE-S FATENT RUDoLrH KLnrn', or noel-insane, new roe-1;, ro err on nocnnsrnn, new YORK, A oonrona'rron on NEW UFFICE.

IGAL COMPANY, YORK.

IRIS niarnnaola. I

Application filed June 36,

To all whomuit may concern .1

Be it known that l, RUDOLPH niacin, a

citizen of the United States, and resident of- Rochester, in the county or Monroe and State of New York, haveinvcnted certain new and useful Improvements in iris Diaphragms, of which the following is a specification. I

The present invention relates to iris diaphragms for use in photographic shutters and other optical appliances, and an object thereof is to provide an iris diaphragm in which the work of assembling the parts is reduced" to a minimum. Another object of the invention is to provide a construction which will permit the mounting of the blades upon the operating ring while thelatter is separated from the supporting housing so that the blades may be more to the casing or support.

To these and other ends, the invention consists of certain parts and combinations of parts all of which will be hereinafter described, the novel features being pointed out in the appended claims.

In the drawings:

Fig. 1 is: a front View of an iris diaphragm constructed in accordance with this inven tion;

Fig. 2 is a rear view of the iris diaphragm;

Figs. 3 and 4% are front and rear views of the operating ring detached from the supporting housing and having the blades mounted thereon, the blades being shown in extreme open positions;

Fig, 5 is an enlarged view of the supporting member or casing with the shutter blades and operating ring removed;

Fig. 6 is an enlarged detail view of the rear face of the operating ring with only one of the blades mounted thereon; and

Fig. 7 15 an enlarged edge view partially in sect-ion through the diaphragm as whole.

In the manufacture of. iris diaphragms prior to this invention, it has been customary to provide two parts usually of annular form, one actingas a casing or support and. the other as the operating member or ring. The blades normally lie between these two parts and are usually assembled, first by connecting them at one end with the supporting casing, and thereafter connecting the operating ring to their other ends. This as sembling operation has been tedious and required a great deal of skill, as the blades Specification of Letters Patent.

readily secured Sierial No. 393,068

must be fitted one a time to ring, and during the fitting of one blade a bladev which has already been fitted is liable to become disconnected from the operating ring.

According to this invention, the blades are connected one at a time to one of the aunt lar or ring members and i are extended through theopening of said member to the opposite side thereof 0 that their other ends will overlap and be heldin frictional contact 111 open positions whereby the openings therein may be simultaneously connected .to hearings on the other ring or annular mem her of the diaphragm, y

lh iferring to the embodiment of the invent on herein illustrated, 1 indicates one of the ring or annular members of the diaphragm, being in this instance the casing or support-- mg member witha surrounding wall 2 and plurality of pivots or bearings 3 projecting from the member 1 within the wall The other ring or annular member 4 is in this instance the' operatingring, and it is held to the supporting ring 1 by a holding ring 5, the latter being secured to the surroundin wall 2 by removable screws 6 and having recess portion 7 through which the 0peratlng portion 8 of the operating ring a may extend. Preferably the operating ring 4; has one face thereof provided with an an nular depressed portion or pocket 9 and the blades 10 are pivoted at 11 to the face of the ring within the pocket so that free movement of the blades is permitted. The'blades 10 are extended through the opening of the ring elto the opposite face thereof, and their opposite ends are provided with openings or the operating slots 11 which are adapted to be fitted over the bearings or pivots 3 on the supporting or casing member 1.

In assembling the diaphragm, the blades 10 are preferably permanently and individually secured to the operating ring a while the latter is detached from the supporting and adapted to be simultaneously fitted over the pivots or bearings on the casing or supporting member 1 when the operating ring and casing ring are assembled. The overlapping relation of the blades holds them frictionally in the outer positions so that there is no tendency for the blades to swing away from such positions.

From the foregoing it will be seen that there has been provided an iris diaphragm of novel construction which permits the more ready assembling of the parts. The blades are secured in the first instance to one of the ring members oi the diaphragm and are projected through the opening of such ring member so that their opposite ends lie on opposite sides of the ring member and the inner periphery of the ring member serves to position the other pivot openings, thus permitting the free ends of the blades to be simultaneously applied to the bearings on the other ring member of the diaphragm.

hat I claim as my invention and desire to secure by Letters Patent is 1. An iris diaphragm comprising two ring members, one of which is mounted to turn on the other, and blades pivotally connected to one of said ring members extending through the opening of the other ring member and pivotally connected to such other ring member.

2. An iris diaphragm comprising a supporting member having bearings thereon, an operating ring, and blades pivotally mounted on one side of said operating ring extending through the opening or said ring and having slots at their opposite ends detachably engaging with the hearings on the supporting member.

3. An iris diaphragm comprising a supporting member having pivots projecting from one face thereof, an operating ring mounted to turn on said supporting member, and blades pivotally connected to one face of the operating ring extending through the opening of said ring and adapted when in their outermost positions to cooperate with the inner periphery of the ring in order to define the outer positions oi? said blades, the ends of the blades being provided with slots adapted to :tit over the pivot pins on the supporting member while the blades are in their outer positions limited by the inner periphery oi the operating ring.

l. An iris diaphragm comprising two ring members, one oi? which is mounted to turn on the other, one of said ring members having a plurality 0i pivots projecting there from, blades pivotally coi'inected to the other of said rin members and cooperating with portions or said ring member to limit the outward movement of said blades thereon, said blades having openings therein which, when the blades cooperate with the portions of the ring member at their outer positions, will be so positioned as to fit over the projecting pivots on the other ring member.

RUDOLPH KLEIN.

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