US1060259A - Automatic exposure attachment. - Google Patents

Description

H. M. JOHNSON.

AUTOMATIC EXPOSURE ATTACHMENT.

APPLIOATLON FILED SEPT. 19, 1912,

1,060,259., Patented Apr. 29, 1913.

3 SHEETSSHEET l H. M. JOHNSON. AUTOMATIC EXPOSURE ATTACHMENT.

APPLICATION FILED SBYT 19.1912.

Patented Apr. 29, 1913.

3 SHEETS-SHEET 2.

3 u ucu toz ET; M. John son.

H. M. JOHNSON.

AUTOMATIC EXPOSURE ATTACHMENT.

APPLICATION FILED SEPT. 19 1912.

Patented Apr. 29, 1918.

3 SHEETSSHEET 8.

I view of'the device. spective view of the 'taken on the line 9-9 4 tive'view of .50

, ject .struction and combination of parts hereinelevation of tion with the parts removed to expose the clock working mechanism. Fig. 3 is a side zontal sectional view" taken on the line like characters of reference designate simi- UNITED s'rafras PATENT OFFER.

HARRY M. JOHNSON,

Application filed September the United States, residing at Fresno, in the county of Fresno, State of California, have invented certain new and useful Improvements in Automatic Exposure Attachmeritsyand I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

T his invention relate. to automatic camera shutter operators, and has for an obto provide a novel bulb holder that will ress the bulb at a predetermined time,

comp

to take his own thus enabling the operator picture, A further object of the invention is to provide novel means for actuating the holder.

\Vith the above objects in view, the invention consists of certain novel details of conafter fully described and claimed, it being understood that various modifications may be made in' the minor details of construction within the scope of the appended claims. i

In the accompanying drawings forming part of this specification, Figure 1 is a side the device applied Fig. 2 is a side elevation of the device in normal posiof-the device in operative position with parts broken-away. Fig. 4 is a 'front' elevationof the device. Fig. 5 is a plan Fig.- 6 is a detail perelevation AUTOMATIC nxrosunr. A'r'rAcin/iiiiv'r,

bulb holder. Fig. 7 is a horizontal sectional view taken on the line 7-7.Fig. 2. Fig. 8 is a. horizontal sectional view taken on the line 8'-8 Fig. 2. Fig. 9 is a fragmentary vertical sectional view Fig. 7. Fig. 10 is a fragmentary vertical sectional view taken on the line 1010 Fig.2. Fig. 11 is a hori- 11-41 Fig. 3; Fig. 12 is a detail perspecthe attaching bracket.

the drawings in Referring now to which box into which;

lar parts, 10 designates a i be inserted, the i my invention is designed to box :bein table 11 y. a bracket such as is shown in 1 preferably secured tothe tripod OF FRESNQ' CALIFORNIA.

' Specification of Letters Patent. 7 P a ten tef l Apr, 191 3,

Serial No. 721,238.

Fig. 12, the bracket including a U-shaped member 12 which is adapted to straddle the edge of the table 11, and an arm 13 which is pivotally attached to the member 12, as shown at 1-1 and is'normally held in horizontal position by a leaf spring 15, the arm being bifurcated to shown at 16, and .there being a hinge leaf 17 applied to the bottom leg of the U-shaped member and operated by a set screw 18 to bind against 1, to secure the bracketthereto.

The device for momentarily squeezing the bulb 19 to actuate the shutter lever 2-0., is shown to comprise a casing 20 of sufiicient size to snugly fit within the box'10 and hav ing a pair of fixed parallel ears 21 rising from the top, these cars being adapted to project above thebox, as shown in Fig. l. A standard 22- is fixed to each frontupper corner of the casing, as shown in Fig. 6, and

between these standards a pair 0 superposed divergent bulb squeezing plates 23 and 24: are arranged, a pintle'25 being passed through the standards andthrough inter-fitting hinge lugs 26 and '27 on the plates to pivotally secure the plates together at their meeting. The free ends of project between the fixed the bulb squeezing plates cars 21 of the cas face near the upper gravity catch 28,, the long leg 28 of which is provided with a stop "finger 29 thatbears upon thetop' edge of the plate and normally holds the catch in such a )osition that upon the'bulb'being inserted etween the plates the free end of th upper plate will contact with theshort'leg 28"- of the catch, as shown in Figs. 5 and 6. The lower'bulb squeezing plate% is of greater length than the upper bulb squeezing plate 23 so that when the former is urged upwardly, as will presently be described, its free end contacts with the long leg 28 of each catch and rocks the catches upwardly with a resultant disengagement of the short legs 28" .of the catches from 'the upper bulb s ueezing plate, as shown in Fig. 3. The hub is squeezed during the travel of the lower plate toward the u per plate, and at the instant the latter is reed "by the catches, the bulb ex ands, the upper plate being carried upwar 1y by and ofierto such expansion of the ing no resistance receive the box, as

-ing, and each ear isprovided on the inner edge with an angular.

rod30 is pivotallyconnected at the upper end tothe plate by means of a pivot pin 31 passed transversely through theupper end 50f the rod and hearing within strap brackets 32 secured to the bottom face ofthe plate. on opposite sides of the rod, as shown in.

.. Fi-gs.'3 and 4. j A vertically swinging lever 33 is secured at'one end to the inner face of-one of the side walls f the casing by means of a pivot pin 34 and is pivotally fsp ring 36 is seated on the connected to the lower end of the stand red by means of a pivot pin 35.

stand rod'between a collar 37 fixed to the rod anda stationary stop bracket 38 fixed to the casing.

The spring is-exp'an'ded duringmanual. de-

presslon of the lower plate to insert the bulb, as shown in Fig. 2, and is held in this position by a .contaet with the stand rod by "1' circular time controlled locking mechanism which .Wlll be. presently described. Upon release of this mechanism, the sprin For' locking the stand red at its lower limit of movement, a horizontally swinging locking bar 39, best shown in Figs. 8 and 11, is pivoted at one end to theinner face ofthe casing top, and is normally held in means of a leaf s ring 40. A projection 41'formed integrafwith the'stand rod near the top of the latter engages underneath of this bar when the stand rod is depressed, as shown in Figs. 2 and 8, and in this position of the parts the stand rod is locked against returning to initial position until the looking bar is moved from engagement with the projection the time controlled mechamsm.

For releasing the locking bar, the free end of the latter is pivotallyeonnecte'd to a ull rod 42 which is slidably' fitted in brackets 43 secured to the inner face of the casing top and is centrally equipped with a dependingf'hook 44. A revoluble gear 45 is fixed to a shaft 46 and is formed with a series of openings 47 arranged cbnoentrically with the shaft, these open ing's be ng adapted to receive a pin 48 car- "the hook and pull the Th seen ried by'a' leaf spring 49 which is loosely mounted on the shaft 46. A side opening 50 formed in the casing exposes the ,gear 45. Referring to Figs. 2 and 3, it will that the hook 44 1s arrangedin the athvof movement of the pin 48, and durng rotation of the-gearthe pin will engage pull. rod 42 Out of engagement with thepr o ection of the stand rod-30; with re ultant, release of the stand 1 d -I. "Thmpull rod limited n its movement A helical a contracts and urges upwardly the stand ro and lower plate, as shown in Fig. 3.

due to the action f the pin by means of a stop lug 51 which projects through a slot 52 in the casing-top, this'lug engaging the end wall of the slot as shown inFi'g. 3and performing the dual function of limitin movement of the pull rod and'holding I e gear 45 against further rotation. To time the release of the stand rod, the pin 48 may be moved from the. position shown in Flg. 3- back to the position shown in Fig. 2, or into that particular opening of the series 47 which will permit of a predetermined lapseof time before the pin is carried by rotation .of the gear into engagement with the hook.

Any desired. means may be employed for actuating the gear, 45, but in the present embodiment of the invention, a clock work mechanism is illustrated, and will be briefly described. By referring to Figs. 7, 9 and '10, itwill be seen that a gear 53 is provided on one side with a sleeve 54 whichis loosely mounted on a'shaft 55 and is provided on the opposite side with a recess which receives a coil spring 56 that is connected at one end to the shaftand at the opposite endto the gear. This gear is only for the purpose of winding ,up the spring, and meshes with a gear 57 which may be retated in one direction by a winding key 58 and is held against rotationiin the opposite direction by a spring 59, thus holding the gear 53 stationary after the latter has been actuated to wind the spring. The shaft 55 is equipped with a gear 60 which actuates the above described pin carrying gear 45 during rotation of the shaft 55 under the unwinding action of .the spring 56. The

shaft 55 is'further equipped with a gear 61 which meshes with a pinion 62 that drives a retarding train of gearing 63, which in turn is controlled by an escapement .64.

The operation of the device is as follows: The operator depresses the lower' bulb squeezing plate 24 and inserts the bulb as shown in Fig. 2. The pin 48 is then engaged in that particular opening of the gear 45 which will permit of a predetermined lapse of time before the pin is rotated by the gear into engagement with the pull rod hook 44. The winding key is then actuated to wind the coil spring 56 and when, released the spring immediately sets in motion the clock work mechanism above described with a resultant rotation ofthe gear 45. The operator may then take position in front of the camera and when the predetermined time has elapsed the pin will have moved into the position shown in Fig. 3 with a resultant momentary 'squeezin of the bulb and actuation of the'camerars utter.

What'is claimed is 1..A bulb compressing device including relatively-movable bulb compressing members, a c'atch'for holding one of said mem- I bers stationary, and means for moving the other of. said members toward the first named member to compress the bulb,the last named member being adapted to engage and release said catch whereby to freethe first named member and permit of expansion of the bulb. 7 p 2. A bulb compressing device including bulb compressing members hingedly connected together and adapted to embrace a bulb, a pivoted catch for normally jliolding one of said members stationary and means for moving the other member toward the stationary held member to compress' flhe bulb, said movable member at the comp etion of its compression movement-tilting said catch to release the stationary held mei'nber and permit of expansion of the bulb.

.members toward the other member, and a catch on said support engaging and holding the last named member stationary, said movable member being adapted during its movement to engage and release said catch with resultant release of said stationary member.

In testimony whereof, I afiix my signature, in presence 0f two Witnesses.

HARRY M. JOHN SON.

\Vitnesses:

ADoLPH J. H. Scrivener, CLARENCE H. NIELSEN.

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