US1120710A - Photographic apparatus. - Google Patents

Description

E. GOLDENSKY & P. H. BARTLETT.

PHOTOGRAPHIG APPARATUS.

APPLICATION FILED FEB. 2, 1914.

1,120,710, Patented D60.4 15, 1914.

13 i FG i IQ ELIAS GQLCDENSKY PERCY H. BARTLETT, F PB ILADELPHIA, :PENNSYLVANIA PHOTOGRAPHIC APIAZBAT'US.

mecano.

Specicaton of Letters Patent.

ljatented Dec. 15, 1914,

@riginal application filed August 17, 1912, Serial No. 715,557. Divided and this application led February 2, i914. Seriallo. 815,969. i

To oZZ whom t may concern:

Be it lmoWn that We, Ennis Gonnnnsnr and Pnncr lll. BARTLETT, citizens oi the `United States, residing in Philadelphia, county ofV Philadelphia, and State of -Penn- Sylvania, have invented new and useful lm provenients in Photographic Apparatus, oi which the following is a speciiication.

@ur invention relates to photographic apparatus and a system particularly adapted studio photograph' whereby the photographer is independent ci daylight and dopends upon artificial lighting of his subiec'ts.

@ur invention resides in a system inyolv sources of light 'whereby the subject to be photographed is rst lighted by relatively low intensity sources and during the period of exposure of the .sensitive plate or nlm" these same sources emit light or" greatly increased intensity. And in this connection our invention resides in means ior simultaneously operating the camera shutter and increasing the voltage impressed upon the lamps, a plurality of which are normally connected in series with each other and then thrown into parallel with each otherv when exposure is mafie.l

For an illustration oione ci the forms our invention may take reference is to be' had to the accompanying drawings, in which:

Figure l is a diagrammatic View illustrating a system for increasing the Voltage impressed upon the electric lamps at the time exposure is made. Fig. 2 is a longitudinal sectional View through a bulb and contacting or switch apparatus. Fig. 3 is a longitudinal sectional View through a modifled form of switching and shutter actuating apparatus.

Referring to Fig. l, the lamps -L are any suitable electric lamps, preferably suchl as will stand repeated subjection to voltage much higher than normal voltage, and for vthe purposes of this invention the lamps L l may be incandescent electric lamps having tungsten, tantalum or other lament. Here the conductors 18 and 19 are the current supply conductors, and from them solenoid 28 is energized when bulb B is pressed to actuate the camera shutter S. The conductor 19 communicates through switch 22 with the contacts 34 and 35 electrically connected to each other by a conductor 36.' rlhe con.

tact 37 is connected to conductor 38 with which one terminal of each o the lamps L is electrically connected. A contact 39 is connected to conductor 40 to which the other terminals 0i some or the lamps are connected, the other terminals o' the remaining lamps being connected to the conductor 1 3. The contact 41 is connected with conductor 40, and the contact 42 is connected through conductor 43 'with conductor 1Q. The movable contact members 44 and 45 are insu fi'- lated from each other by member 46 caT ing the contacts and and pivot them at 4'?. A spring 25 holds the men 44 and normally in the positie i. indicated -Fig. l and the piyoted link 23 connects these members 44 and 45 with the core of the solenoid. lhe lamps L in this oase may be vol lamps, pairs of lzich are connected in series with each other between conductors i8 and 40, diiierent pairs normal potential diii'erence, for example,

yolts. When the bulb B is pressed, the shutter S is actuated and the conductors 3l andl 32 brought into electrical communication with each other by any suitable switching mechanism. The solenoid 28 is noW- energized and it attracts its core 27 toward the left swinging the members 44 and 45 in a counter clockwise direction upon their pivot 47, causing contact 44 to leave con! tacts 35 and 39 and to engage contacts 34 and 37, contact 45 engaging contacts 41 and 42. NOW current flows from conductor 18 through the upper set of lamps through conductor 38 to contact 37, through member 44 to Contact 34, to conductor 19 ,with they .result that the upper set of lamps is subjected to 110 volts, or twice their normal voltage. Simultaneously however current iiows from conductor 18 through conductor 43, contact 42, member 45, contact 41, conductor 40, through the lower set oflamps L to conductor 38, contact 37, contact 44, contact 34, to conductor 19, thus subjecting this set of lamps to double voltage also. lin consequence all the lamps glow with extreme intensity. And when the exposure is terminated by release ofthe bulb B the solenoid is denergized and the spring 25 restores the members 44 and 45 to the positions shown in Fig. 1, where the lamps glow at their normal intensities As an illustration of one form of means for simultaneously making the exposure and energizing the solenoid 28, reference maybe 'had to Fig. 2where B is the bulb communicating with the hollow member 48 te which the tube 49 is attached. Movable longitudinally of and around the tube 49 is the tube 50 having the opening 51 communicating with the tube 33 extending to the shutter. Registering with thefopening 51 is the elongated opening 52 in the wall of the tube 49, longitudinal and rotary adjustment of the tube 50 upon the tube 49 maintains these openings 51 and 52 is register, but changes the position of the tube 51 longitudinally of the tube 49. Within the tube 49 is secured the member 53 having apertures 54 and carrying the screw 55 to which is connected a spring 56 whose other end is connected to the piston or plunger 57 to which is secured a stem 58, preferably of insulating materiahcarrying the bridging contact 59 adapted to bridge the contacts 60 and 61 supported on the insulating member 62 fixed within the tube 50. The conductors 31 and 32 connect with the terminals 60 and 61 respectively. When the bulb B is pressed air pressure is exerted through the apertures 54 and through the tube 33 upon the shutter mechanism and simultaneously upon the plunger 57 which then moves toward the right, as viewed'in Fig. 3, causing the contact 59 to bridge the contacts 60 and 61, thereby causing the en-V ergization of solenoid 28. Upon release of the pressure on the bulb B terminating the exposure. the spring 56 retracts'the plunger 57 and therefore separates the contact 59 from contacts 60 and 61, causing denergization of the solenoid 28. By the longitudinal adjustment of the tube 50 upon the tube 49 the time of travel of the plunger 57 before contact 59 engages contacts 60 and 61 may be adjusted. And the plunger 57 may be so positioned that contact 59 has engaged or almost engaged contacts 60 land 61 before it uncoversthe port or opening 52 to allow air to pass through the tube] 33 to actuate the shutter. 1

' switching means and said shutter. Y

' 3. The combination with a source of cur ln Fig. f3 a cylinder 63 communicates through aperture 64 with the tube 33 extending to the shutter. The plunger 57 is moved in this cylinder 63 by pressure upon the head 64 upon the rod 65 to which the plunger 57 is attached, linger grips 66 being provided upon the cylinder 63 so that the device may be actuated by one hand. The motion of the plunger 57l is opposed by the spring 67. Surrounding the rod 65 is the contact 68 adapted to bridge the contacts 60 and 61 supported by and insulated from the cylinder 63, the contacts 31and 32, as before, connecting with the contacts 60 and 61 respectively. When the head 64 is pressed toward the right the plunger forces air ahead of it through the tube 33 to actuate the shutter. And contact 68 engages contacts 60 and 61 to close the circuit of the solenoid,'the plunger 57 and rod 65 continuing their movement, if necessary, after the engagement of these contacts, through the member 68. When the pressure upon the head 64 is released the spring 67 retracts the plunger and finally pin 69 carried by the rod 65 engages the member 68 and carries it away from contacts 60 and 61, causing denergization of the solenoid.

While Figs. 2 and 3 give examples of means for simultaneously operating the shutter and closing the solenoid circuit, it is to be understood that we are not limited to these constructions, except where it is specifically stated in the claims; land'it is to be understood Vthat the contacting mechamsm may be situated at the shutter and moved by the shutter mechanism itself when actuated either by bulb or any other means.

This application is a division of our prior with each other to said predetermined voltage, a camerashutteryand means for simultaneously actuating `sa1d camera shutter and said switchln means. Y

' 2.The com ination with a source of current, a plurality of lamps v'normally connected 'in-series with each other and said ,sourceA of current, switehin 'means for changing saidflamps from Aseries relation to parallel relation with each other with respect to 4said source," a camera shutter, and"AA` means for simultaneously actuating said rent, va plurality of' lam s normally connected in series with eac other and said source vof current, switching means for changing said lamps from series' relation to parallel relation with each other with reaxed our signatures in the presence of the spect to said source, electro-magnetic means two subscrbinwitnesses. for operating said switching means, a cam- E IAS GOLDENSKY.

era. shutter, and means for simultaneously PERCY H. BARTLETT. 5 operating said shutter and said electro-mag- Witnesses:

netc means. NELLE B. EVANS,

In testimony lwhereof We have hereunto A. S. MARSH.

Images