US3576156A - Mechanism for actuating ignition of percussion-ignitable flash lamps - Google Patents

Mechanism for actuating ignition of percussion-ignitable flash lamps Download PDF

Info

Publication number
US3576156A
US3576156A US767100A US3576156DA US3576156A US 3576156 A US3576156 A US 3576156A US 767100 A US767100 A US 767100A US 3576156D A US3576156D A US 3576156DA US 3576156 A US3576156 A US 3576156A
Authority
US
United States
Prior art keywords
shutter
driver
movement
shutter driver
movable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US767100A
Other languages
English (en)
Inventor
Chester W Michatek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Application granted granted Critical
Publication of US3576156A publication Critical patent/US3576156A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/02—Illuminating scene
    • G03B15/03—Combinations of cameras with lighting apparatus; Flash units
    • G03B15/04—Combinations of cameras with non-electronic flash apparatus; Non-electronic flash units
    • G03B15/0478—Combinations of photographic apparatus with percussion type flash ignition systems
    • G03B15/0494—Means for mounting percussion type flash apparatus

Definitions

  • a'mechanism for actuating ignition of a percussion-ignitable flashlamp unit received in the socket using motion of the shutter driver to supply the force for said actuation.
  • This invention relates generally to photographic apparatus and particularly to a mechanism for actuating ignition of a percusion-ignitable flashlamp unit in use with such apparatus.
  • flashlamp unit of this kind is described in copending US. Pat. application, Ser. No. 765,930, entitled MULTILAMP FLASH UNIT, filed Octv 8, I968, in the name of David E. Beach.
  • a socket that is suitable for receiving and operatively supporting such a flashlamp unit is described in commonly assigned, copending US. Pat. application Ser. No. 765,931, entitled SOCKET FOR MULTILAMP FLASH UNIT, filed Oct. 8, 1968, in the name of David E. Beach.
  • a photographic apparatus and a mechanism therein suitable for percussively igniting such a flashlamp unit supported in such a socket are described in commonly assigned, copending US. Pat. application, Ser. No. 766,739, entitled APPARATUS FOR ACTUATING FIRING OF PERCUSSION-IGNITABLE FLASH LAMPS AND OPERATING MECHANISM THEREFOR, filed in the name of William T. Hochreiter.
  • the mechanism described in the copending Hochreiter application for actuating ignition of a percussion-ignitable flashlamp unit comprises a shutter-driving member which, through suitable linkage, cocks and then releases a resilient striking member, such as a leaf spring, mounted in a position normally adjacent to but spaced from a received percussionignitable flashlamp unit.
  • a resilient striking member such as a leaf spring
  • Such a mechanism has the disadvantages of being mechanically complex and of first requiring cocking of the resilient striking member bythe shutter-driving member prior to its release for movement into percussive contact with the received flash unit. Since, in photographic apparatus, actuation of flashlamp ignition normally must preceed shutter opening, the mechanism just described could pose a limitation in achieving optimum synchronization of flashlamp ignition with shutter opening. There is thus a need for a simpler mechanism by which ignition of a received percussionignitable flashlamp unit may be effectuated more directly.
  • an object of the present invention was to provide, for use in photographic apparatus of the type having means for operatively receiving a percussion-ignitable flashlamp unit, a mechanism to actuate ignition of a received percussion-ignitable flashlamp unit that would be simpler in construction, more direct in operation, and more efficient in synchronizing flashlamp ignition with shutter opening, than other such mechanisms known heretofore.
  • Another object of the invention was to provide such an improved mechanism that would be suitable for actuating ignition of a percussion-ignitable flashlamp in a received multilamp flash unit having a plurality of such lamps.
  • a further object was to provide such an improved mechanism that would be particularly suitable for actuating ignition of a percussion-ignitable flashlamp in a received flash unit having at least one such lamp and an associated striking member that is' moveable upon actuation into percussive contact with its associated lamp.
  • the present invention provides a mechanism for actuating ignition of a percussionignitable flashlamp unit received in a socket on a photographic apparatus having a shutter and movable shutter opening means, the mechanism comprising an actuating means movable by the shutter opening means into contact with a received flash unit for effecting ignition of the received unit.
  • the socket is adapted to receive a multilamp flash unit of the type having a plurality of percussion-ignitable lamps and a plurality of associated striking members, each movable independently into percussive contact with its associated lamp, the actuating means being movable into contact with such a unit received in the socket toeffect movement of one of the striking members into percussive contact with its associated lamp to ignite the lamp.
  • the drawing illustrates a photographic camera 10 having a housing 11 that includes a front wall 12 and a top wall 13, the front and top walls 12 and 13 being shown partially broken away for clarity of illustration.
  • camera 10 includes a shutter 14 pivoted as at 15 for movement between a closed position shown in solid lines and an open position shown in broken lines, a spring 16 mounted at one end on a pin 17 fixed to camera housing 11 and at the other end on shutter 14 for returning shutter I4 from its open position to its closed position, a shutter-driving member or driver 18 slidably mounted for movement by a spring 19 into driving engagement with shutter 14, and a shutter-release member 20 slidably mounted for downward releasing movement by the camera operator and upward return movement by a spring 21 to respectively release shutter driver 18 from, and retain shutter driver 18 in, its cocked position shown in solid lines.
  • a shutter 14 pivoted as at 15 for movement between a closed position shown in solid lines and an open position shown in broken lines
  • a spring 16 mounted at one end on a pin 17 fixed to camera housing
  • a filmwinding and shutter-cocking mechanism through which the camera operator can effect the return of shutter driver 18 from its released position shown in broken lines to its cocked position shown in solid lines.
  • shutter-release member 20 having been returned by spring 21 to its original position, shown in solid lines, retains shutter driver 18 in its cocked position by the engagement of lug 22 with lug 23 as shown.
  • Shutter driver 18 includes a shutter-driving portion 24, extending toward front wall 12 and engageable with portion 25 of shutter 14, and another portion 26 extending toward top wall 13 as shown. Spaced slightly to the right of portion 26 is a ramp portion 27 of an irregularly shaped actuating member 28, which is pivotally mounted as at 29 to permit substantially vertical movement of an upwardly extending finger 30 at the right-hand end of member 28.
  • a socket 31 for removably receiving a multilamp flash unit 32 having a plurality of percussion-ignitable lamps 33 therein, such a flash unit being shown in a position above camera from which it may conveniently be inserted into socket 31.
  • Each of the percussion-ignitable lamps 33 in flash unit 32 has a primer stem or ignition tube 34 depending therefrom as shown.
  • a resilient striking member 35 Disposed within unit 32, in a position adjacent to but spaced from the ignition tube 34 of each lamp 33, is a resilient striking member 35 biased for movement into percussive contact with tube 34 but shown retained or cocked against such movement by a lug 36 protruding upwardly from the base 37 of unit 32.
  • each cocked striking member 35 In base 37, beneath each cocked striking member 35, is an opening or hole 38 through which an actuating member such as finger 30 can move to push striking member 35 upwardly out of engagement with lug 36 and thereby release striking member 35 for rapid movement, under its own biasing influence, into percussive contact with ignition tube 34.
  • an actuating member such as finger 30 can move to push striking member 35 upwardly out of engagement with lug 36 and thereby release striking member 35 for rapid movement, under its own biasing influence, into percussive contact with ignition tube 34.
  • a squareshaped mounting stem 39 having a square-shaped axial opening therein (not shown).
  • each sidewall 40 of mounting stem 39 is a recess or opening 41 through which a suitably shaped retaining finger of socket 31 can extend.
  • Socket 31 includes a square-shaped center post 42, which is snugly receivably in the square-shaped axial opening in mounting stem 39, and a plurality of fingers 43 that are resiliently movable into engagement with recesses or openings 41 in mounting stem 39 when center post 42 is received in the axial opening of stem 39 upon insertion of unit 32 into socket 31.
  • the snug fit of square-shaped center post 42 in the squareshaped axial opening in mounting stem 39 serves to both orient unit 32 in an operative angular position and retain unit 32 against unintended rotation in the socket during use, while fingers 43, when engaged with recesses or openings 41, serve particularly to retain unit 32 against possible upward movement during percussive ignition of a lamp 33 in the unit.
  • a flash-unit mounting stern and a mating socket center post of this type also permit a smaller socket opening than has been used heretofore.
  • top wall 13 Shown in top wall 13, at a location adjacent to the socket opening, is a hole 44 to permit movement of finger 30 into and out of contact with received flash unit 32, finger 30, in its upward travel, protruding through hole 44 and through hole 38 thereabove to push striking member 35 upwardly out of engagement with lug 36 as previously described.
  • Actuating member 28 is caused to rotate in a counterclockwise direction, as viewed in the drawing, when struck at ramp portion 27 by portion 26 of shutter driver 18 during movement of driver 18 by spring 19 in the direction of arrow A, such counterclockwise rotation of actuating member 28 resulting in upward movement of finger 30 into contact with received flash unit 32. It has been found that suitable synchronization of flashlamp ignition with shutter opening is obtained when shutter driver 18 strikes actuating member 28 before shutter driver 18 strikes shutter 14, thereby permitting peak flashlamp illumination to be attained by the time shutter 14 is fully opened.
  • shutter driver 18 travels in the direction of arrow A a certain distance before striking first ramp portion 27 of actuating member 28 and then portion 25 of shutter 14, it should be understood that the entire stroke of movement by shutter driver 18 in the direction of arrow A, both before and after shutter driver 18 engages actuating member 28 and shutter 14, is considered and referred to herein as shutteropening movement of shutter driver 18.
  • finger 30 of actuating member 28 thus provides a percussion-ignition actuating means that is movable into contact with a received flash unit 32 to effect percussion ignition of a lamp 33 in the received unit, such actuating means being coupled to, or integral with, a movable member such as actuating member 28 that is driven directly by shutter driver 18 during shutter-opening movement of driver 18.
  • the mechanism of the present invention works as follows. Upon the camera operators downward movement of shutter-release member 20 from its position shown in solid lines to its position shown in broken lines, the shutter-driving member or driver 18 is released for rapid movement by spring 19 in the direction of arrow A. Such movement of shutter driver 18 first causes portion 26 thereof to strike ramp portion 27 of actuating member 28, causing member 28 to rotate in a counterclockwise direction and thereby move finger 30 upwardly through hole 44 and through hole 38 to release striking member 35 for movement into percussive contact with ignition tube 34 of lamp 33.
  • shutter driver 18 continues movement in the direction of arrow A then causes portion 24 thereof to strike portion 25 of shutter 14, causing shutter 14 to rotate in a clockwise direction from its closed position to its open position.
  • the aforementioned film-winding and shutter-cocking mechanism (not shown) in the camera is operated by the camera operator to efiect the return of shutter driver 18 and actuating member 28 to their original positions shown in the drawing, shutter-release member 20 having already been returned to its original position by return spring 21.
  • an ignition member movable from a first position to a second position to release a striker of a received unit
  • a shutter driver movable between a first position and a second position
  • said shutter driver includes:
  • a shutter driver mounted for movement from a first position to a second position; b. means for urging said shutter driver from said first position towards said second position; v r c. releasable means for retaining said shutter driver in said first position; and
  • a flash igniting member movable from a retracted position to an igniting position for firing a percussion ignitable flashlamp and means movable with said shutter driver for translating the force of movement of said shutter driver in going from said first to said second position to said igniting member to move said igniting member from its retracted position to its firing position in timed relation with opening of said shutter.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Stroboscope Apparatuses (AREA)
US767100A 1968-10-14 1968-10-14 Mechanism for actuating ignition of percussion-ignitable flash lamps Expired - Lifetime US3576156A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US76710068A 1968-10-14 1968-10-14

Publications (1)

Publication Number Publication Date
US3576156A true US3576156A (en) 1971-04-27

Family

ID=25078478

Family Applications (1)

Application Number Title Priority Date Filing Date
US767100A Expired - Lifetime US3576156A (en) 1968-10-14 1968-10-14 Mechanism for actuating ignition of percussion-ignitable flash lamps

Country Status (5)

Country Link
US (1) US3576156A (enrdf_load_stackoverflow)
DE (2) DE1951340C3 (enrdf_load_stackoverflow)
FR (1) FR2020612A1 (enrdf_load_stackoverflow)
GB (1) GB1286641A (enrdf_load_stackoverflow)
MY (1) MY7300450A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3630129A (en) * 1969-11-22 1971-12-28 Eastman Kodak Co Camera mechanism for actuating mechanically fireable flash
US3665827A (en) * 1970-11-25 1972-05-30 Imp Camera Corp Flash lamp actuating structure
US3677156A (en) * 1969-08-23 1972-07-18 Eastman Kodak Co Simplified synchronizing mechanism for cameras adapted to use mechanically fired flash lamps
US3687034A (en) * 1970-06-29 1972-08-29 Polaroid Corp Exposure control mechanism with mechanical flash synchronization
US3687033A (en) * 1970-03-30 1972-08-29 David E Beach Mechanism for operating a camera shutter and a mechanically operable flash device in synchronism
US3706268A (en) * 1970-07-30 1972-12-19 Agfa Gevaert Ag Photographic apparatus
US3719126A (en) * 1970-07-30 1973-03-06 Agfa Gevaert Ag Photographic apparatus for use with percussive multilamp photoflash units
US4565431A (en) * 1984-12-24 1986-01-21 Eastman Kodak Company Photographic camera and flash assembly

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS505934B1 (enrdf_load_stackoverflow) * 1970-05-25 1975-03-08
DE19545096A1 (de) 1995-12-04 1997-06-05 Basf Ag Verfahren zur Herstellung einer wäßrigen Polymerisatdispersion
AU3466800A (en) * 1999-12-23 2001-07-09 Alexandr Jurievich Karev Propolis water extract and method for the preparation thereof, and water-solublepropolis powder

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US501800A (en) * 1893-07-18 Flash-light apparatus
US590204A (en) * 1897-09-21 Roll-holding flash-light camera
US1307220A (en) * 1919-06-17 Photographer s flash-light
US2091601A (en) * 1934-03-26 1937-08-31 Philips Nv Flash lamp

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US501800A (en) * 1893-07-18 Flash-light apparatus
US590204A (en) * 1897-09-21 Roll-holding flash-light camera
US1307220A (en) * 1919-06-17 Photographer s flash-light
US2091601A (en) * 1934-03-26 1937-08-31 Philips Nv Flash lamp

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3677156A (en) * 1969-08-23 1972-07-18 Eastman Kodak Co Simplified synchronizing mechanism for cameras adapted to use mechanically fired flash lamps
US3630129A (en) * 1969-11-22 1971-12-28 Eastman Kodak Co Camera mechanism for actuating mechanically fireable flash
US3687033A (en) * 1970-03-30 1972-08-29 David E Beach Mechanism for operating a camera shutter and a mechanically operable flash device in synchronism
US3687034A (en) * 1970-06-29 1972-08-29 Polaroid Corp Exposure control mechanism with mechanical flash synchronization
US3706268A (en) * 1970-07-30 1972-12-19 Agfa Gevaert Ag Photographic apparatus
US3719126A (en) * 1970-07-30 1973-03-06 Agfa Gevaert Ag Photographic apparatus for use with percussive multilamp photoflash units
US3665827A (en) * 1970-11-25 1972-05-30 Imp Camera Corp Flash lamp actuating structure
US4565431A (en) * 1984-12-24 1986-01-21 Eastman Kodak Company Photographic camera and flash assembly

Also Published As

Publication number Publication date
FR2020612A1 (enrdf_load_stackoverflow) 1970-07-17
DE6939595U (de) 1970-10-22
DE1951340A1 (de) 1970-05-06
DE1951340C3 (de) 1975-10-02
GB1286641A (en) 1972-08-23
MY7300450A (en) 1973-12-31

Similar Documents

Publication Publication Date Title
US3576156A (en) Mechanism for actuating ignition of percussion-ignitable flash lamps
US3576155A (en) Photographic apparatus for use with flash units having individual striker elements
US3672813A (en) Adapter for igniting electrically ignitable flashlamps
US3630129A (en) Camera mechanism for actuating mechanically fireable flash
US3614413A (en) Percussion activatable flash units having individual striker elements
US3584554A (en) Apparatus for actuating firing of percussion-ignitable flaslamps and operating mechanism therefor
US3584556A (en) Torsion striking device for use in firing percussion-ignitable photoflash lamps
US3687033A (en) Mechanism for operating a camera shutter and a mechanically operable flash device in synchronism
US3544250A (en) Firing mechanism for percussion-ignitable flash lamps
US3584794A (en) Firing mechanism for percussively ignitable flash units
US3584555A (en) Firing and shutter synchronization for use with percussive photoflash system
US3550514A (en) Adapter for igniting electrically ignitable flash lamps
US3584551A (en) Mechanism for retaining a percussion-ignitable flashlamp unit
US3584550A (en) Mechanisms for moving a striker element out of the firing locus of a percussion-ignitable flashlamp
US3706265A (en) Photographic apparatus for firing a plurality of flash lamps
US3866033A (en) Photoflash assembly with serially advancing percussive lamps
US3544249A (en) Percussion type flash lamp igniter
US3552287A (en) Photoflash lamp firing mechanism
US3967142A (en) Piezoelectric crystal firing spring and mount
US3590706A (en) Adapter for igniting percussion-ignitable flashlamp units
US3581637A (en) Device for igniting percussion-ignitable flash lamps
US3677158A (en) Mechanism for synchronizing operation of a camera shutter and a mechanically actuated flash device
US3596581A (en) Photographic apparatus for firing percussion-ignitable flash lamps
US3589849A (en) Dampening control device for percussive photoflash firing mechanism
US3640196A (en) Photographic apparatus for mechanically actuable photoflash units