US908560A - Projection apparatus. - Google Patents

Description

E W. GOODBIGH. llwmoi'ron APPARATUS. i APPLICATION FILED JAH. 21, 190B.

Patented Jan. 5, 1909.

E W. GOODRICH.

PRJEGTION APPARATUS.

APPLICATION FILED JAN. 27. 190e.

Patented Jail. 5, 1909. 4 SHEETS-snm 2.

E W. GOODRICH.

' PRoJEc'rIoN APPARATUS.

A u m w 5, w 8

Patented Jam 5, 1909. Y

4 SHEETS-SHEET 4.

EMORY W. GOODRIOH, OF SOMER'VILLE, MASSACHUSETTS.

PROJECTION APPARATUS.

Specification of Letters Patent.

Patented Jan. 6, 1909.

Application tiled. January 27, 1908. Serial No. 412,788;

To all 'whom it may concern:

Be it known that I, Enomy W. Goonnrcn, a citizen of the United States, and a resident of Somerville, in the county of Middlesex and State of Massachusetts, have invented an Improvement in Projection Apparatus, of which the following description, 1n connection with the accompanying drawing, is a specification, like letters on the drawing representing like arts. i

T is invention relates to projection appa.- ratus of that type adapted for both opaque and transparent rejection work.

The object of t e invention is to provide a novel apparatus of this class which is simple and compact in its construction; which is so arranged that all adjustments of the lamp, mirror, lenses, etc., can be made from the front oi the machine `or from that side of the machine on which the operator stands in manipulating it; which is so constructed that the condensing lenses can be readily removed or replaced; and which is inproved in many other ways all as will be more fully hereinafter described and then pointed out in the claims.

Referring to the drawings wherein l have illustrated one embodiment of my invention, Figure 1 is a front view of a projection apparatus'cmbodying my invention; Fig. 2 is a section on the hne c-c, li'ig. 7; Fig. 3 is a side view of the )rejection ap aratus; Fig. 4 is a section on t 1e line :c--a', lgf 5; Fig. 5 is a side view of the removable holder i'or the condensing lens; Fig. 6 is a view ol the ap iaratus showing the opposite side from that shown in Fig. 3; Fig. 7 isa see-tion on the line y-f1/, Fig. 6; Fig. S is a side. vie-w of the lamp; Fig. 9 is a sei-.tion on 4the. lino rtw-o., Fig. 8; Fig. 1() is a section Qn lhg line limb, Fig. 8; 191gll is u. delnil offihe rover i'or the slot in the. lamp house.

3 is the lmnp house ol uur Suitable or usual construction within wluc is situated the lamp or other source nl' illumination.

Vlhile it is within my im-'entiou lo use. any suitable menus for producing the desired light l have herein sliown nu :ire hun i l'or this purpose. the eur-bons ol' which nre i esignulrjil l und 5.

'lln` lamp is shown in dotted linesv Vig. il. Assorinled with the lump .rre (he us-uul rou-- lensingle-nses 8 for (-oudenslne' or collilnnling the rays from the lump u[0 u ben-m.

My improved appnrutus is designed 'for both opaque projection work and transparent projection work, and I have shown herein two objectives, one for transparent worktransparency, l employ a mirror 0r reflectorV 10 w lich is situated at the proper angle to thus reilect said rays.

One advantage of this construction is that while the reflector i0 will reflect practically all of the light rays, et it will not rcilect to any great extent the ieat waves, and the reiiected beam of light is therefore much cooler than the beam collimated by the condensing lens. 'lhisis a decided advantage because it permits transparencies to be used which are sensitive to heat and which might be injured by the heat oi an ordinary unreflected beam of light rays.

The objective which is used in opaque projection work is designated generally by 11. This objective stands vertically at right angles to tho objective (l and the. casingr is open beneath said objective, as at 12.

Situated beneath thil opening l2 is a horizontal tuble 13 on which the opaque objectlnay be placed. Said table is preferably 11m-de vertically adjustable so that opaque. ohieifls oi diil'erent thicknesses can be used. While this vertical n-djnstimnt ol' the table 11i-.Ly be, rlleeed in various ways without dcpurti'ig from the invention l have herein shown the lahle ns provided with u .stom4 14 which is ndjuslnhly mounted in u. bracket or urni l5, nud seid bracket is in turn. adjustnbly mounted ou u. suspender I6 depeinliug from the frame ol the )rejection a lparatus, snid bracket being: hehl in adjusted position on the suspender by n clamping: screw i7. ',l`hie`l ronstrin'iion permits the table io be ndjusted and also 1.o be swung' horizontally out from under tlnl l'runn' ol lln` n ipzu'nlus und in position lo. receive opiupie olhjerts olI uny charm-tor.

When the nipnrutns is used for opaque projection worlr [he mirror 10 is moved out ion . rays- 9, and while this may of the way so as not to interfere with the beam of rays 9. Said beam will thus be thrown directly onto the table 13 thereby to illumine the object. The fact that the beam of rays is thrown obliquely onto the table does not affect in any wa the results desired. The light rays `ra iating from the illumined obect pass to the objective 11, and from said o jective are refiected onto the screen. For this urpose I have rovided a mirror 130 whie is sustained a ove the objective 11 and is in position to refiect the image of the illumined object toward 'the same screen on which the im ve of the transarent object is projected by t e ob'ective 6. he mirror 130 1s made adjustable oth vertically and angularly so that it can be easily adjusted into the roper 'position to refleet the beam of lig t rays passing throuih the objective 11 in such a direction that t e image of the opaque object will be projected onto the screen in the same position as the image of the transparency. Said mirror is shown as mounted on a stem 140 which is adjustably sustained by a head 150 at the upper end of a rod 160, and the rod 160 is vertically adjustable in suitable bearings 170. The mirror 130 serves not only to reflect the image of the illumined object onto the same screen which is used for receiving the transparent projection but it also serves as an image erecting mirror which revents perversion of the projected figure. s stated above said mirror4 10 is so mounted that' it can be moved out of the wayL of the beam of e done in a variety of ways without departing from my invent-ioni have herein shown a construction wherein said mirror is mounted in a sliding carrier or frame.

The frame herein shown comprises the two side pieces 22 and 23 which are rigidly connected by the cross bar or oke 24. Both sides areslidably mounted in earings formed in a rest or support 25 and the side 23 extends through the wall 27 of the lamp house and is provided with a finger piece or pull 26 by means of which the sliding frame can be manipulated.

' 'Ihe mirror 10 is pivoted to a stem 20 which sets over and is sustained by a standard 21. 'This standard has a huhJS which receives the end of theicylindrical side piece 22 and is held in position thereon b a set screw. I he standard can he adjusts about the side piece 22, and the mirror can he turned both on its pivot at the top of the stein 20 and also about the standard 21 as an axis, and b means of this construction said mirror can 1e adjusted into any desired position. '-lihe guides for the side pieces or rods 22 and 23 guide the mirror m its sliding movement, and the exposed finger piece 26 affords a convenient mcaris for moving the mirror into and outof position. Any other beam of rays 9 by the mirror 10. Accordingly a small mirror, such as shown in the drawings, and which is of a size to reflect the ima e onl of the are light, may be sutilcient un ess t e objective has a lon focus in which case a mirror of a size to re ect substantially all of the beam 9 would be preferable.

In ap aratus of this character the com (lensing enses are usually subjected to heat from t e lamp, and it not infrequently happens that one or the other of said lenses ecomes broken while the ap aratus is in operation. In most devices o this charac ter the removal-of either or bothof the con densing lenses involves opening a door in the side of the lam house and reaching into the lamp house. he removal of the condensing lenses in this way is sometimes a rather dflicult task and requires more or less time.

The condensing lenses are mounted in a holder which is arranged to be readily removed from the lamp house whenever it is necessary to-clean or change the lenses. This holder is des' nated by 30, and is shown best in Figs. 4 anl 5. It com rises a frame having an o ening therein of tie size of the condensing enses, and rovided with sprin clips 31 t0 engage the er ges of the` lenses an( support the latter. 'lhe frame is secured to a ook or head piece 32 which is rovidcd with a handle 33. -The wall of t e lamp house is made with an o eningpf a size to receive the block 32 and rame 30, and when said holder is inserted into the opening the lenses 8 stand in the proper position relative to the arc. Said lenses can be readily re moved by simply withdrawing the holder and then removing the lenses from the clips 31. This takes but a moments time, and by means of this construction a broken lens can be replaced lwithout interfering materially with the operation of projecting images. The block or head piece 32 fills the o lening lin the wall of the lamp house when the older is in place and constitutes a closure ior said openm The iamp herein shown is provided with the usual mechanism for adji sting the carbons, but it is so arranged that it can he fed. from the front of the lamp house. In order to provide for this I have arranged the follewin construction. The lamp is supporte suitable supports in the lamp heise; said rods have mounted thereon a yoke 41 in which is adjustably mounted a stem 42 -carlying aframe 43 on which the adjusting dcon two rods 40 that are secured in fvices for the carbons are mounted. This `threaded shaft 45 which works in a nut 49,

3nd said nut 49 also has extending therefrom z. n arm 50 having at its end a carbon holder 51. The rod 52 has fast thereto a thumb piece 53 by which it may be turned. Surrounding said rod is a sleeve 54 also having a thumb piece 55 secured thereto, said sleeve carrying ther4 gear 56 Which is adapted to mesh wittt'agcar 57 fast on the shaft 45. By operating the thumb pieces 55 and 53 separately the carbons can be fed independently, and by working Bifem together, the carbons may be fed simultaneously. This general method of feeding the carbons is old and forms no part of my present invention. 'The novel feature about the lamp is its construction by which the thumb pieces for feedin the carbons are placed in front of the arc an are therefore accessible at the front of the projection apparatus.

It will be noted that the carbons are supported at the end of arms and are, therefore, situated considerably at one side of the screw-threaded shafts. The rod 52 and sleeve 54 are lon enough to extend throu h the front wall o the lam house, as clear y shown in I igs.1 and 6, so t at the lamps may be fed from in front and without the necessity of reaching around behind the lamp house, as is the case in many devices of this class.

The lamp house is rovided with the usual door in one side an is also provided with a slot 61 in said side, said slot leading from the door openingl to the point where the stem 54 projects. T is slot 61 is normally closed by a cover 62 which is of the shape s own in l-ig. 11 and which is held in place by means of guides 64. The object of makin the lamp house with the slot 61 is to facl itate the removal of the` iam With the construction herein shown t is can be accomplished by simply removin the cover 62 and opening the door 60 and tien detacliing the frame 43 from the yoke 41 and removing the lamp through the door opening and the slot 61, said slotI permitting the rejected stein 54 to be withdrawn from the amp house.

It will be noted that the feeding means lor the lamp and the ull 26 for shifting the mir- IO' 10 are locate on that side of the lamp house where the o erator stands for insertin the slides into tlhe holder 7 or placingr the objects on the table 13. All of the mechanism of the a paratl's, therefore, is located on the same si e of the apparatus and is within easy reach of the operator.

67 designates a finder of any suitable or usual construction through whlch the arc is visible by the operator.

My @vice is simple and oem-peet its. censtruction and can easily be changed from an opaque projection apparatus to a transparent pro'ection apparatus simply by manlpulating t e pull 26 and shifting the mirror 10.

I have not illustrated herein all embodiments of my invention, but have shown the preferred embodiment only.

In the claims I shall refer to the source of illumination as a lamp, and b this term I nzan to include any device or producing Having described my invention what I claim as new and desire to secure by Letters Patent is 1; In a projection apparatus, the combination with a lamp, of two objectives situated at an angle to each other, a movable mirror to reflect light from said lam toward one 0bjective, and a horizontal object-supporting table in line with the other objective and in position to be illumined by the lamp.

2. In a projection apparatus, the combination with a lamp, of a orizontally-arranged objective, a mirror to reflect the light from said lam -toward the objective, a verticallyarrange objective, a horizontal object-supporting table beneath said latter objective and in position to be illumined by the lamp.

3. In a projection apparatus, the combination with a lamp, of a orizontally-arranged objective, a mirror to reiect the light from said lam toward the objective, a vertically-l arrange objective, a horizontal object-supporting table beneath said latter objective and in position to be illumined by the lamp, and means to move the mirror into and out of its operative position.

4. In a projection apparatus, the combination with a lamp, arranged to project a beam of light downwardly at an inclination, of a horizontal object-supporting table adapted to be illumined by said beam, a verticallyarranged objective above said table, a mirror above said objective, a second horizontallyarranged objective, a mirror adapted to reflect said beam toward, said objective, and

'means to move the mirror into and out of operative position.

5. In a projection apparatus, the combination with a lamp and a lamp house therefor, ol an objective, a mirror to reflect the light from the lamp toward the objective, means exterior to the lamp house for shifting the position of the mirror, and means on the lsame side of the lamp house for operating the lamp.

6. In a projection apparatus, the combination with an arc lamp, of a lamp house therefor, means exterior to the lam house at the front of the arc for feeding said arc, and an objective.

7. In a projection apparatus, the combina tion with an are lamp comprising carbon holders and a ro jeeting stein for feeding said holders, of a lmnp house therefor, said lamp house having a door-opening in one side and a slot extending therefrom to an adjacent side, said slot being parallel to and in line With the projecting stem whereby the lamp may beremoved bodily from the lamp house through said door-opening and slot. 8. In a pro'ection apparatus, the combination with a. lamp including carbon holders and a projecting stem for feeding the carbon holders, said stern being situated in front of the lamp, of a lamp house having a doorsuesse opening in the side and aslot extendin therefrom toward the front thereof paral el with the stem of the lamp whereby said lamp ma be removed from the lam house throug said door-opening and said s ot, and reans t0 20 removabl sustain the lamp in the lamp house wit i the end of the stem exposed at the 'front side of the lamp house.

In testimony whereof, I have signed my name to this specification, in the presence of 25

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