USRE22338E

USRE22338E - mendelsohn

Info

Publication number: USRE22338E
Authority: US
Publication date: 1943-06-22

Description

s. MENDELsoHN Re. 22,338

PHOTOFLASH SYNCHRONIZER 3 Sheets-Sheet l Original Filed Sept. 2l, 1936 June 22', 1943. l

INVENTOR.

' June 22, 1'943. s. MNDELSOHN n PHOTOFLASH SYNGHRONIZER 3 Sheets--SheevI 2 Original Filed Sept, 21, 1956 ATTORNEY.

Re. Y22,338

` S. MENDELSOHN PHOTOFLASH SYNCHRONIZER Original Filed Sept. 21, 1956 2 e n u J 3 Sheets-ShenI 3 ATTORNEY.

Reuued June 22, 1943 u1u-riso STATES PATENT Aorner.

Pno'romsn srmcuaomzmt samuel Mendenhall, Manteau, N. J. original No. 2,204,424, ma June 11'. 1940, serial No. 101,782, for reissue n claims. This invention relates to a device for use with photographic apparatus for the purpose ci synchroniziri-g -the flash produced by a photoash' means for causing an instantaneous actuation of l a cable release to actuate a camera shutter and to operate a phototlash lamp.

Another object of the invention is to provide a device attachable to a camera so arranged an constructed that upon the operation of a switch to light a photoflash lamp a simultaneous operation of the camera shutter is effected.

Another object 'of the invention is to provide a device in which means are provided to store sumcient potential energy to operate a cable release and to release said energy by means effecting an operation of a photoash lamp.

Another object of the invention is to provide a l combined mechanical and electrical device in which electrical energy operates to release mechanical energy to cause the simultaneous or synchronized operation of a photoi'lash lamp and a camera shutter.

Other objects and advantages of the invention will be more clearly understood by reference to the following description together with the accompanying drawings in which,

Fig. l is a perspective view of a device constructed in accordancel with my invention applied to a camera;

Fig. 2 is an enlarged side viewk of my device partly broken away to more clearly show certain movable parts; l

Fig. 3 is a view taken on thel right hand side of the device shown in Fig. l;

Fig. 4 is a view taken on line IV--IV in Fig. 2;

Fig. 5 is a schematic viewof the electrical circuit and spring actuated elements of the present device, and

Fig. 6 is a curve showing the peak of light illumination in I. P. U. (international photographic units) and the duration in fractions of seconds.

Although the present camera shutter operating device may be supported in any suitable Vmanner d 20 side of the battery il (see Fig. 5).

50 Sheath or casing 6s piece 4| which bridges September-721, 1936. Application May 14, 1941, Serial No. 393,463

one practical embodiment is shown wherein the shutter operating mechanism actuateswhat is termed a cable release which in turn actuates' a camera shutter.

5 The said mechanism which is indicated as/a whole by the numeral I'Il is contained in a support Il having flanges I2 secured to a battery casing I4. At one end I5 of the casing is a socket I6 to receive the base of a photoiiash lamp` I1 of the usual commercial type. A reiiector I8 may be provided at one side of the lamp. The lamp I1 is provided with a heater element or primer I9 around which is disposed loosely packed aluminum foil 20. The heater element is provided with leads 2| and 22 which are connected in the usual manner -to the 'metallic shell of the base and to a central contact thereof. The shell of the base is electrically connected to a conductor 23 with one The central contact is connected by conductor 2l to the other side of the battery. A switch 25.is provided for purposes to be later described. Conductor 23' leads from the shell of the base to one end of the 25 coil of a solenoid 26 and conductor 24' leads from the central contact of the base to the other end ofthe coil of the solenoid. Thus when' the switch 26 is closed current iiows through the heater element I9 and through the solenoid 2G to energize the same and operates an armature 21. The armature serves to release a plunger 28 to actuate acable release which in turn actuates a camera shutter arm 23 through the movement of a cable release 30 in the form of a flexible wire 3D in a casing 3l.

The mechanism for operating the cable release includes the support I I which carries a housing 33 for theplunger 28 and the solenoid 26. This housing is held in the support II and retained by cross-pieces or

slide clamps

34 and 35.

These clamps may be fitted tightly or may be held by set screws and being adjustable along the support it is possible to adjust the housing 33 relative to the support for purposes to be presently described.

Between the housing 33 and the battery casing and inclosed by the support II is a socket or retainer member 36 for the cable release 30. As above pointed outI the cable release includes a 3| which is anchored in the l member 3G and one end 31 of the flexible wire 3B oi' the cable release is attached to one end of a push rod 38 in an adjustable bearing 39. The

other end of the push rod is secured to a iinger the push rod and the The plunger 28 is provided with a latch member to engage the armature 21 which latter is norber and an adjustable bearing 46 serves to provide energy to actuate the plunger 28 and consequently the cable release.

The upper end 41 oi' a cap 49 cable release.

In operation a lamp is inserted in the socket, the switch 25 be actuated by the cable re1ease.

'I'he switch 25 is then closed to cause current to ow in the circuit. 'Ihe coil of the solenoid ycoil of the solenoid becomes energized to cause yso that the potential energy -in the springL is released to operate the camera shutter at the peak ofthe ilash and as shown in the graph Fig. 6 it takes` .019 of a second to reach thev peak for the highest I. P. U. output.

In my Patent No. 1,986,513, yissued January 1, 1935, a device is the armature to move elements operate to trip the shutter.

As will be noted the cable release is adjustable since the operating mechanism is slidable in the A set screw 52 holds the housing 33 by reason of the clamps 3l and 35. When the set screw 52 is loosened the clamps slideV to perso that the exact degree of impact on the lever of the shutter may be attained.

The stop and stop I9 serve to provide a fine degree of adjustment in limiting the movement of the plunger 2l in of the Iiash. With the adjustment provided'the device may be readily set to operate a shutter with any make of photoiash bulb.`

'I'he present invention provides -a device which 'Ihe solenoid yarmature may be adjusted by varying the tension of the spring Il to hasten or delay the action of the amature to give a time factor in that it can be photoash lamp having certain characteristics, or adjusted for another type lamp or different timed relation to the peak v the operation ofthe device soinitially set for a given type. oi"y of the armature of trigger member 21. latter bears against the latch member 43 which acts as a stop for the armature 21, the air gap operation of the device. I

I claim:

3. A device for operating a photoash lamp and a shutter simultaneously comprising a shut-V actuating member' at substantially the peak of the flash.

4. A device for operating a photoash'lamp and a camera shutter simultaneously comprising casas a shutter actuating member, a spring,

said member ready for actuation under the expansive force of said spring, means for adjusting said trigger member for varying the time factor of operation of said device, meansy for supporting a photoflash lamp, a solenoid circuit, a photofias'h lamp circuit in parallel with said solenoid circuit,'and means for causing a flow of electrical energy through said circuits to flash said lamp and actuate saidtrigger within a predetermined period of time following initial flow of energy in said circuits t release said shutter actuating member at substantially the peak. of the flash and means for varying the degree of movement of said shutter actuating member.

5. A device for operating a photoilash lamp and a camera shutter simultaneously, comprising a shutter actuating member, means for storing potential energy upon a movement of said memto said shutter actuating member andthe other end positioned to engage a camera shutter arm, a solenoid having an armature arranged to Vconstitute a trigger member for holding said shutteractuating member ready for actuation, means for adjusting said `trigger member for varying the time factor of operation of said device, means for supporting a photofiash lamp, a solenoid circuit, a photoflash lamp circuit in parallel with said solenoid circuit and means for causing a` flow of electrical energy through said circuits to flash said lamp and move said trigger within a predetermined period of time following initial flow of energy in .said circuits to release said shutter actuating member at substantially the peak of the flash.

6. A device for operating `a `photoash lamp and a camera shutter simultaneously comprising a`shutter actuating member, means for storing potential energy upon a movement of said member, a flexible member having one end connected to said shutter actuating member and the other end positioned to engage a camera shutter arm, a solenoid having an armature arranged to constitute a trigger member for holding said shutter actuating memberready for actuation, means for adjusting said .trigger member for varying the time factor of operation of said device, means for supporting a. rhotoash lamp, a solenoid circuit,

a photoash la'np circuitI .in .parallel with said solenoid circuit. and means for causing a flow of electricalenergy through said circuits to flash said lamp and move said trigger within a predetermined period of time following initial flow of .ener/gyda said circuits to release said shutteractuating member at substantially the peak of the flash and means for adjusting the degree of forward movement of said shutter actuating member.

'L A device for operating a photoash lamp and a camera shutter simultaneously comprising a shutter actuating member, a spring, means carried by said member for compressing said spring upon movement of said member. a nexible membei' having one end connected to said shutter actuating member a'nd the other end positioned to engage a camera shutter arm, a 'solenoid having an armature constituting a trigger to hold said member against expansive force of said spring ready for said trigger member for varying actuation, means for adjusting the time factor said memberagainst of operation of said device,- means for supporting a photoiiash lamp,

cuit, and means for causing a flow of electrical energy through said circuits to flash said lamp and actuate said trigger within a predetermined time period 'following initial flow of energy in said circuits to release said shutter actuating member at substantially they peak of the flash.

8. A device for operating a photoflash lamp and a camera shutter simultaneously comprising a shutter actuating member, a spring, means carried by said memberfor compressing said spring upon movement of said member, a flexible member having one end connected to said shutter actuating memberand theI other end positioned to engage a camera shutter arm, a solenoid having an armature constituting a trigger to hold expansive force of said spring ready for actuation, means for adjusting l said trigger member 'for varying the time factor ber, a flexible member having one end connected l holding the plunger magnet also carried ranged of operation of said device, means for supporting a photoiash lamp, a solenoid circuit, a photoflash Alamp circuit in parallel withv said solenoid circuit, and means for causing a flow of electrical energy through said `cix'cuitsto ilash said rlamp and actuate said trigger within a predetermined time period following initial ilow of energy in said circuits-to release said shutter actuating member at substantially the peak of the dash, and means for varying the degree of movement of said shut ter actuating member.

9. 'A camera shutter operating device comprising a plunger, means for moving the plunger to actuate a, shutter release, movable means for in s etvposition, an armature connected to said holding means, an electromagnet arranged moving -the holding means out .of engagement with the plunger, and extent of movement of said armature.

.10. A camera shutter operating device' comprising, a plunger having a portion adapted to act on a shutter release and a sliding portion, a spring arranged to urge the plunger toward shutter release actuating position, means for adjusting the spring to vary the speed of motion of the plunger, movable means for holding the plunger in set position, an armature operatively associated with said holding means, said holding means and said armature being movablyfmounted on said support, an electroby said support and arranged to act on said armature for moving the holding means out of engagement with the plunger, and of movement of i means for regulating the extent said armature.

l1. A camera shutter operating device comprising, a plunger having a. portion'adaptedto act on a shutter release and a a spring arranged tourge the shutter release actuating position, means for adiusting the spring to lvary the speed of motion of the plunger, movable means for holding the plungerin set position, an armature operatively associated with said holding means, asupporting means and said armature being pivotally mounted on said frame, an electromagnet also mounted on said frame and arto act on said armature for moving the holding means out of engagement with the plunger, and means for regulating the extent of movea solenoid circuit, a photoilash lamp circuit in parallel with said solenoid cir-l to act on said armature fory means fo regulating the a support,

sliding portion, plunger toward