US1279164A - Photographic camera. - Google Patents

Description

A. A. RUTTAN & G. l. KESTER.

PHOTOGRAPHIC CAMERA.

APPLICATION FILED JUNE 7. 1917.

PatentedSept. 17, 1918.

4 SHEETS-SHEET 1. y- 7 WITNESSE A. A. RUTTAN & G. I. KESTER,

PHOTOGRAPHIC CAMERA.

APPLICATION FILED JUNE 7. I911.

1 ,279, 1 64:. Patented Sept. 17, 1918} 4 SHEETSSHEET 2.

' TTOR/VEIS A. A. RUTTAN & G. I. KESTER.

, PHOTOGRAPHiC CAMERA.

APPLICATION FILED JUNE 7, 19H- 1,279,164.

WITNESSES:

UNITED STATES PATENT OFFICE.

ALFRED A. RUTTAN AND GEORGE I. KES'IER, OF ROCHESTER, NEW YORK, ASSIGNORS TO EASTMAN KODAK COMPANY, OF ROCHESTER, NEW YORK, A CORPORATION OF NEW YORK.

PHOTOGRAPHIC CAMERA.

Specification of Letters Patent. Patented Sept, 17, 1918.

Application filed June 7, 1917. Serial No. 173,381.

To all whom it may concern:

Be it known that we, ALFRED A. RUTTAN and GEORGE I. Kns'rnmof Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Photographic Cameras; and we do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the reference-numerals.

marked thereon.

Our present invention relates to photography and more particularly to cameras of the type employing a focusing screen and it has for its object. to improve and simplify the construction and mode of operation whereby the shutter and focusing devices are connected up to automatically work in harmony with eacliother at all times with a minimum ofthought and action imposed upon the operator. To these and other ends the invention resides in certain improvements and combinations of parts all as will be hereinafter more fully described, the novel features being pointed out. in the claims at the end of the specification.

In the drawings:

- Figure 1 is a side elevation of a camera constructed in accordance with and. illustrating one embodiment of our invention,

the focusing hood being partially extended for use;

Fig. 2 is a central vertical section through the camera including the lens and shutter, on line 2-2 of Fig. V

Fig. 3 is a front viewv of the shutter-and connected parts partially in section;.

F ig. 4 is a horizontal section taken substantially on the line 44 of Fig. 2;

Fig. 5 is a front view of the shutter similar to Fig. 3 but showing it set for an instantaneous exposure;

Fig. 6 is a view similar to Fig. 5 but show.- ing the shutter blade closed preliminary to an instantaneous exposure;

Fig. 7 is a fragmentary view similar to Fig. 3, partially in section, showing the shutter open during the progress of a time exposure;

Fig. 8 is a detail elevation of the shutter tripping means adjusted for a tlme exposure;

Fig. 9 is an enlarged detail section taken substantiallyon the line 99 of Fig. 8;

Fig. 10 is a detail fragmentary section taken substantially on the'line 10-l0 of Fig. 5, and

Fig. 11 is an enlarged fragmentary sec tion through the focusing hood chamber showing the focusing hood in folded position.

Similar reference numerals throughout the several views indicate the same parts.

y We have illustrated our improvements, in the present instance in connection with a reflex box camera of the lens focusing type provided with a focusing hood, aswinging mirror and a shutter, the exposure being controlled by the shutter and not by the mir ror, and the focusing screen being at the top of the camera and the plate or film holder at the rear. The camera comprises a body 1 having a seat 2 at the rear (Figs. 2 and 4) for the sensitive material which latter is held and covered by a back 3 hinged at 4 and secured by spring catch 5.

Between the said seat and the front wall- 6 is comprised the ex 'osure' and, mirror chamber 7, the front wa l 6 being provided with the usual lens opening 8 and lens .9.

A shutter chamber 10 is provided between the forward wall 6 and a front cover 11, the latter being provided with a central lens opening 12 in a bushing 13. A diaphragm slide 14 provided with a plurality of different sized openings 15 and cooperating with the rear of the bushing regulates the yolume --of light and is operated by a finger portion 16 (Figs. 1 and 4) projecting to the exterior of the camera.

At the top' of the body 1 is awell or chamber 17 for the focusing hood 18 and in the bottom of this well and in the top of'the exposure and mirror chamber 7 is a focusing openin 19. fitted with a ground glass or other ocusing screen 20. Surrounding the glass and holding it in place is a frame 21 that is alsothe attaching means for .the lower end of the bellows 18 while the upper end of the latter is provided with an eyep ece frame 22 hinged at 23 to a cover 24.

This cover 24 is hinged at 25 to the camera body and isadapte'd to close the well 17 when the camera is fblded, a' spring catch 26 cooperating with a flange 27 at the front edge of the cover to hold it down against the tension of a hinge spring 28 that'seeks to raise the cover and extend the bellows. When. thus extended, the bellows, though collapsible, is of sufli'ciently stiff material to hold the eye-piece frame 22 in the operative position of Fig. 2 against the tenslon of a spring 29, the function of which is to otherwise hold the eye-piece frame folded agalnst the under side of the cover 24. The extended position of the bellows is shown 1n Fi 2 and the folded position in Fig. 11.

The focusing opening 19 is normally sealed against the entrance-of light through the focusing screen 20 by a mirror frame 30, p

as shown in dotted lines in Fig. 2. This mirror frame swings on a shaft 31 extending transversely of the body 1 at the upper rear corner of the chamber 7. It is in its lnoperative position when sealing the opening 19 and rests against a seat 31 surrounding and below the opening and preferably covered with plush or other pile fabric 32 to insure a light-tight contact. In its operative POSI- tion the mirror frame occupies a. seat 33 constituting the forward opening of a prism shaped hood composed of an upwardy inclined plate 34 at the bottom of the chamber 7 and triangular plates 35 at the side. These plates are connected to a rear frame 36 in which is formed the exposure opening 37 of the camera that is located just forwardly of and'defines the exposure area on sensitive material arranged in the seat 2. Flanges 38 on the mirrorframe overlap the seat 33 and are relied upon to prevent the passage of light from the lens to the exposure opening. WVhen in this operative position shown in full lines in Fig. 2, a mirror 39 carried on the front and top of the mirror frame 30 is suitably inclined to-reflect the image cast by the lens 9 upon the screen 20, as usual.

Still referring more particularly to Figs. 2 and 4 and also to Fig. 1, the mirror frame and mirror are manipulated by means of an operating lever 40 on the exterior of the camera body 1. This lever is fixed to a stud shaft 41 journaled in a wall of the body and on its inner end is fixed a plate 42 having three diverging arms 43, 44 and 45. The arm 43 has a sliding pivotal connection at 46 with the side flange 38 of the mirror frame 30 and when the exterior operating arm 40 is depressed from th full l1ne position of Fig. 1 to the dotted position, the mirror and frame are swung from the inoper.

ative dotted line position of Fig. 2 downwardly to the full line operative position. This is accomplished against the tension of a main actuating spring 47 that is connected to the arm 44 at one end and to a pin or other fixture 48 on a-Wall of the chamber 7 at the other. The tendency of this spring therefore is to actuate the mirror frame from operative position to the inoperative position and close the focusing opening 19. The third arm 45 constitutes a shutter actuating connection and it is through this arm that the mirror is held in operative position against the tension of spring 47, as will be presently described.

The shutter mechanism is mounted, in the present instance, on the front wall 6 of the body 1 and chamber 7 and within the forward chamber 10. Before going into the details of its construction, we may state that we have so correlated the shutter and mirror and their controlling devices that both are set by means of the operating member 40; both are actuated by the main spring 47; both are released by the same tripping device, and, while the shutter is normally closed, it is always open for focusing when the mirror is in operative position yet closes preliminarily to its exposing movement as the mirror is passing to its inoperative position to seal the focusing opening 19 and permit the lens to cast the image upon the sensitive material. I

For the details of the shutter mechanism, reference may now be had more particularly to Fig. 2 which shows it in section, and to Fig. 3 which shows it in normal position. The shutter blade 49 is, in the present instance, of the rotary disk type and turns upon a pivot screw50 mounted in a bushing 51 in the wall 6. It turns against a raised plate 52 ofiset from said wall 6 having an opening 53 coincident with the lens opening 8 and lens 9 and an opening 54 in the shutter blade passes into and out of register with this opening 53 as the blade is rotated. Normally, it is out of register as before mentioned and as shown in Fig. 3. 'Pivoted to the plate 52 at 55 on one side of the blade pivot 50 is a lever, 56 having secured thereto at 57 one end of a spring arm 58. The other end of said arm has sliding engagement with a perforated ear 59 on the blade 49 on the opposite side of the pivot 50 thereof. The lever 56 is pivotally connected by means of a link 60 with the forward end of arm 45 on the operating shaft 41 and in the position of Fig. 3, the main spring 47 is holding the mirror 39 up or in inoperative position and has rocked this arm 45 to the lowered position indicated in dotted lines in Fig.2. When so lowered, the shutter lever 56 places the spring arm 58 under tension for upward thrust so that a shoulder 61 on the shutter blade 49 is held against a stop ear 62 on a plate63 adjustably connected at 64 to the mounting plate 52 and the shutter is held closed. At this time the operating member or setting lever 40 is raised, as

shown in Fig. 3 and in full lines in Fig. 1.

Upon depressing this operating member to set the mirror in operative position for focusing, the arm 45 is raised against the tension of the main actuating spring 47 to the position of Fig. 5. This rocks the shutter lever 56 in a clockwise-direction and reverses the tension on the spring arm 58 which carries the shutter blade 49in a clockwise direction and opens the shutter, as shown in said last mentioned figure. As the shoulder 61 leaves the stop 62, the blade is halted .with the opening 54 thereof in register with the lens opening 53 by the engagement of a stop ear 65 with a detent 66, consisting of a flange on a sliding plate 67 movable back and forth on guide pins 68 on the plate 52. The detent is held in the path of the stop ear 65 by a spring 69 secured to the plate 52 at 70 that throws the detent plate 67 to the left and carried on this plate is another detent or catch shoulder. 71 shown in Fig. 10 which is en aged by a shoulder 72 on the rear side of t e upper end of link 60 when the arm 45 is raised. The link is so engaged in Fig. 5 when the shutter stop 65 is against detent 66 holding the shutter open. The mirror is now in operative position and the main spring 47 is held under tension by the said detent 71 so that focusing may he proceeded with.

It will also be noted from Fig. 5 that the spring arm 58 has not only opened the shutter but is still under tension while the mirror is in position for focusing. A ush button 73 (Figs. 3, 4 and 10) mounte in a bushing 74 in a wall of the camera is in alinement with the flanged end 75 of detent plate 67 and pressure upon this button effects an exposure. As the button is operated, the detent plate 67 is thrown to the right in Fig.

. 5 with the result that the stop ear 65 on the shutter blade becomes disengaged from the detent 66 and passes through a notch 76 therein, clearly shown in Fig. 4. Spring arm 58 thereupon immediately closes the shutter in a clockwise direction as shown in Fig. 6 and holds it closed with a shoulder 77 thereon inengagement with the stop 62. This occurs before the detent plate 67 has moved far enough to slide the detent 71 thereon (Fig. 10). from beneath the shoulder 72 on the link'60 so that the shutter will be closed and seal the camera from the entrance of light at the front before the mirror frame 30- can leave theoperative full line position of Fig. 2. At the completion of the movement of the detent plate 67 by the button 73, the detent 71 is, however, disengaged with the result that the main actuatlng spring v47 comes into play and instantly swings the mirror frame 30 to the raised F}?- sition sealing the focusing opening 19.

arm 45 moves downward and, through the link 60, rocks the shutter lever 56 in a counter clockwise direction, again reversing the tension on spring arm 58 and causing it to open and then close the shutter, the movement being from the position of Fig. 6 back to the normal position of Fig. 3. The detent plate 67 being still pushed to the right, there is nothing to obstruct this opening and closing movement of the shutter blade in the counter clockwise directionas the stop ear I same direction and is then opened and closed.

by the main spring 47 acting through the medium of the spring arm 58 in the opposite direction. I

During the setting movement (Fig. 3 to Fig. 5) it is, of course, necessary that the shutter shall open for focusing only after the mirror frame 30 has reached its seat 33 and is in a position to prevent access of light to the sensitive material in seat 2 yet the shutter is opened and the mirror carried downward by means of the one operating member 40. We therefore provide means for slightly delaying the opening of the shutter and this means consists, in the present instance, of-a segmental shoe 78 carried on an arm 79 of the shutter lever 56. As the latter is rocked from the position of Fig. 3 during the setting movement, this shoe crosses the path of the stop ear 65 on the blade 49 and is engaged by said ear to maintain the shutter closed until the spring arm 58 is placed under tension and the mirror frame has reached its seat at the upward limit of movement of the setting arm 45 and the shutter lever 56, as in Fig. 5, whereupon the stop 65' slips off of the shoe 78 and engages the detent 66.

Mounted on the same guide pins 68 as is is rotatable as well as slidable in the bushing 74 and is provided with a laterally extending foot 84 at its inner end. When the button is turned so that this foot is upward as in Fig. 10, the button will actuate only the detent plate 67 but when it is rotated a quarter turn to the right, the foot 84 comes opposite to the flange 83 on the plate 80 and that 1s actuated also when the button is pressed in, as shown in Fig. 7. But the abutment 66 projects farther into the path of the stop ear 65 than does the abutment or detent 81 and therefore the stop ear 65 is always halted by the detent 66 when rotating to the right to hold the shutter open as in Fig. 5. When, however, the shutter is set and closed as in Fig. 6 and the button is in position to carry the detent 81 inward, the return movement of the shutter blade 49 to open and close the shutter and make the exposure is halted with the shutter open as in Fig. 7 by the engagement of ear 65 with abutment 81, as also shown in said figure, the said detent 81 thus acting as a time stop and producing a time exposure. The button is held at rest during the period of exposure and when released, the detent 81 is withdrawn by its spring 82 and the stop ear 65 liberated, permitting the completion of, the blade movement and the closing of the shutter as before.

To indicate whether the button 73 is set for a time or instantaneous exposure, it is encircled by a disk 85 that is keyed to it at 86 for rotation but through which it is adapted to slide. This disk has a finger portion 87 and a segmental opening 88 and on the bottom of the bushing 74 are two designations 89 and 90 (Figs. 1 and 8) for instantaneous and time exposures, respectively. \Vhen the disk is turned as in Fig. 1, so that the designation 89 is visible, the foot 84 is out. of register with the time detent plate 80 and when the disk is turned as in Fig. 8, to expose the designation 90, the ear is in register with the plate and ready to operate both it and the plate 67 for a time exposure.

lVe make no claim to the shutter per se in this application, claims therefor being made in our application Serial No. 238,630, filed June 7, 1918, as a division of thisapplication.

We claim as our invention:

1. In a camera, the combination with a focusing screen, of a swinging mirror having a set position for throwing the image on the screen and an inoperative position covering the latter, and a shutter, of a common operating member having independent connection with the mirror and shutter respectively for setting both the mirror and the shutter.

2. In a camera, the combination with a focusing screen, a swinging mirror having a set position for throwing the image on the screen and an inoperative position covering the latter, and a shutter having a normally closed position, of a common operating member having independent connection with the mirror and shutter respectively for setting the mirror and opening the shutter.

3. In a camera, the combination with a focusing screen, a swinging mirror ha vin'g a set position for throwing the image on the screen and an inoperative position covering the latter, and 'a shutter having a normally closed position, of a common operating member for setting both the mirror and the shutter and acting to initially open the latter.

4. In a camera. the combination with a focusing screen, of a swinging mirror having a'set position for throwing the image on the screen and an inoperative position covering the latter, and a shutter, of a pivoted member mounted in a wall of the camera and having an exterior operating member and two interior arms, one of which is operatively connected with the mirror and the other of which is operatively connected With the shutter.

5. In a camera, the combination with a focusing screen, of a swinging mirror having a set position for throwing the image on the screen and an inoperative position covering the latter, and a shutter, of a common operating member for setting both the mirror and the shutter, and an actuating spring common to both the mirror and shutter for moving the former to inoperative position and for opening and closing the latter.

6. In a camera, the combination with a focusing screen, a swinging mirror having a set position for throwing the image on the screen and an inoperative position covering the latter, and a shutter having a normally closed position, of a spring for moving the mirror to inoperative position, a commonoperating member for setting both the mirror and shutter and acting to initially open the latter, and a detent for both maintaining the shutter'in said open position and for holding the mirror in set position.

7. In a camera, the combination with a focusing screen, a swinging mirror having a set position for throwing the image on the screen and an inoperative position covering the latter, and a shutter having a normally closed position, of a common operating member for setting both the mirror and shutter and acting to initially open the latter, a detent for maintaining the shutter open and a spring for closing the shutter when the detent is withdrawn.

8. In a camera, the combination with a focusing screen, a swinging mirror having a set position for throwing the image on the screen and an inoperative position covering the latter, and a shutter having a normally closed position, of an actuating spring common to boththe mirror and shutter for moving the former to inoperative position and for opening and closing the latter, a common operating member for setting both the mirror and shutter and acting to initially open the latter, a detent for maintaining the shutter open and a spring for closing the shutter when the detent is withdrawn.

9. In a camera, the combination with a focusing screen, a swinging mirror having a set position for throwing the image on the screen and an inoperative position covering the latter, and a shutter having a normally closed position, of an actuating spring common to both the mirror and shutter for moving the former to inoperative position and for opening and closing the latter, a common operating member for setting both the mirror and shutter and acting to initially open the latter, a detent for maintaining the shutter open and the mirror in set position and a spring for closing the shutter when the detent is Withdrawn.

1 0. In a camera, the combination with a focusing screen, of a swinging mirror having a set position for throwing the image. on the screen and an inoperative position covering the latter, and a shutter having a normally closed position, of a spring for moving the mirror to inoperative position and for opening and closing the shutter, a common means for setting the mirror and shutter, and a spring operable to open the shutter under the influence of the setting means.

11. In a camera, the combination with a focusingscreen, of a swinging mirror having a set position for throwing the image on the screen and an inoperative position covering the latter, and a shutter having a normally closed position, of a spring for moving the mirror to inoperative position and for opening and closing the shutter, a common means for setting the mirror and shutter, and a spring operable to open the shutter under the influence of the setting means and through the medium of which the shutter is opened and closed by the first mentioned spring. I

12. In a camera, the combination With a focusing screen, of a swinging mirror having a set position for throwing the image on the screen and an inoperative position covering the latter, and a shutter having a normally closed position, of a spring for moving the mirror to inoperative position and for opening and closing the shutter, a common means for setting the mirror and shutter, a detent for holding the shutter open and the mirror set, and a spring operable to open the shutter under the influence of the setting means and to close it when the detent is released. ALFRED A. RUTTAN. GEORGE I. KESTER. Witnesses:

- R. L. STINCHFIELD, D. H. STEWART.

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