US2296274A - Facsimile recorder - Google Patents

Facsimile recorder Download PDF

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Publication number
US2296274A
US2296274A US334404A US33440440A US2296274A US 2296274 A US2296274 A US 2296274A US 334404 A US334404 A US 334404A US 33440440 A US33440440 A US 33440440A US 2296274 A US2296274 A US 2296274A
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United States
Prior art keywords
stylus
scanning
synchronizing
shaft
arm
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Expired - Lifetime
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US334404A
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English (en)
Inventor
William G H Finch
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Individual
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Individual
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Publication date
Priority to FR962503D priority Critical patent/FR962503A/fr
Application filed by Individual filed Critical Individual
Priority to US334404A priority patent/US2296274A/en
Priority claimed from US352937A external-priority patent/US2290230A/en
Application granted granted Critical
Priority to US459319A priority patent/US2374673A/en
Publication of US2296274A publication Critical patent/US2296274A/en
Priority to US585466A priority patent/US2464970A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/12—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using the sheet-feed movement or the medium-advance or the drum-rotation movement as the slow scanning component, e.g. arrangements for the main-scanning
    • H04N1/14—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using the sheet-feed movement or the medium-advance or the drum-rotation movement as the slow scanning component, e.g. arrangements for the main-scanning using a rotating endless belt carrying the scanning heads or at least a part of the main scanning components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/12—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using the sheet-feed movement or the medium-advance or the drum-rotation movement as the slow scanning component, e.g. arrangements for the main-scanning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/36—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device for synchronising or phasing transmitter and receiver

Definitions

  • FIGJY FIGJS.
  • This invention relates to the transmission and reception offacsimile signals and more particularly to synchronizing apparatus for use in connection therewith, said synchronizing apparatus particularly at the receiving end being so arranged that a minimum number of parts are brought to a stop in order to await any particular synchronizing signal.
  • the apparatus then was started by the reception of the synchronizing impulse which permitted the scanning member of the receiving apparatus to commence a new scanning excursion simultaneously with the commencement of the scanning excursion at the transmitting end.
  • the receiving apparatus comprised a multistylus chain drive or'an oscillating stylus mounted on a scanning arm or alight beam scanning device moving longitudinally along a revolving drum, it became necessary to stop a relatively great mass at the end of a particular scanning cycle and to bring this relatively great mass into motion once more immediately upon receipt of the synchronizing impulse.
  • Thlssame not greater force in the light beam scanning re-' ception apparatus wherein the light beam traversed a reception drum longitudinally-while the drum revolved. In this case it was necessary not ,merely to bring the light beam scanning appawere driven from the 'motor or other source of ratus itself to a stop but also to bring the receiving drum to a stop upon the completion of a difllculty was present with equal if impulse to initiate the actual scanning operation.
  • Another object of the present invention is to so mount and relate the actual scanning member itself to the various other moving parts that it is.
  • Still another object of the invention is to obtain proper synchronization while the moving parts of the receiving scanner may maintain constant uninterrupted. unchanged movement.
  • Still a further object of the present invention is to provide a synchronizing apparatus wherein the speed of the receiving apparatus may be cut down to almost that of the transmitting apparatus.
  • Still another object of the present invention is to provide a means for obtaining automatic phasing at the start of the picture transmission and for automatically phasing the receiving apparatus at various selected intervals controllable from the transmitting station.
  • facsimile receiving apparatus Since in many cases, facsimile receiving apparatus is to be used in the home by unskilled operators, it is essential that virtually all of the operations thereof be either greatly simplified or if possible, controlled from the transmitting station.
  • the automatic phasing means herein provided will increase the utility of this apparatus in the home. Furthermore, the automatic phasing means herein provided may be arranged to coact with the scanning element in order toreposition the scanning element with respect to its drive apparatus at selected intervals in order to ensure that the scanning element will remain aligned with its driving elements.
  • Figure l is a top plan view of a multi-stylus facsimile recorder utilizing the principle of my invention.
  • Figure 2 is a side view of the apparatus of Fig ure 1.
  • Figure 3 is an end view of the apparatus of Figure 1.
  • Figure 4 is a cross-sectional view taken on line 4-4 of Figure 3.
  • Figure 5 is an end view taken along the line 5-5 of Figure 1.
  • Figure 6 is a view partly in cross-section showing the front of the scanner and is taken from line 6-6 of Figure 1.
  • Figure 7 is a view partly in cross section taken along line 'I-l of Figure 1 showing the resetting means for the stylus.
  • Figure 8 is a cross-sectional view taken along line 8-8 of Figure 6.
  • Figure 9 is a top view partly broken away taken along line 9-9 of Figure 1.
  • Figure 10 is a cross-sectional view taken along line III-l0 of Figure 1.
  • Figure 11 is a cross-sectional view taken along line H-i i of Figure 1 showing the paper feed.
  • Figure 12 is a cross-sectional view taken along line l2-l2 of Figure 10.
  • Figure 13 is a cross-sectional view taken along line 13-13 of Figure 2 showing the chain and sprocket drive.
  • Figure 14 is a cross-sectional view taken along line M-M of Figure 13.
  • Figure 15 is a cross-sectional view taken along line l5-l5 of Figure 2.
  • Figure 16 is a cross-sectional view taken along line lS-IB of Figure 1.
  • Figure 17 is a cross-sectional view taken along line 'lI-ll of Figure 1.
  • Figure 18 is a cross-sectional view taken along line l8-l8 of Figure 1'7.
  • Figure 19 is a view of the portion of the paper surface contacted by the stylus and showing guides for the scanning stylus of Figure 1.
  • Figure 20 is a. cross-sectional view taken along line 20-20 of Figure 19.
  • Figure 21 is a cross-sectional view taken along line 2I-2l of Figure 19.
  • Figure 21a is a view corresponding to a portion of Figure 6 showing a' modified form of relay construction.
  • Figure 21b is a cross-sectional view on line 2llr-2Ib if Figure 21a.
  • Figure 22 is a top plan view of light beam scanner recorder utilizing the principles of the present invention.
  • Figure 23 is an end view partly in cross-section taken along line 23-2: of Figure 22.
  • Figure 24 is a cross-sectional view partly in elevational taken along line 26-24 of Figure 22.
  • Figure 25 is a cross-sectional view partly in elevation taken along line 25-25 of Figure 22.
  • Figure 26 is a cross-sectional view taken on line 26-26 of Figure 22.
  • Figure 2'7 is a view corresponding to a portion of Figure 23 showing another position of the parts thereof.
  • Figure 28 is a view corresponding to a portion of Figure 26 showing another position of the parts thereof.
  • Figure 29 is a top plan view taken along line 29-29 of Figure 23 showing one position of the synchronizing elements.
  • Figures 30, 31, 32 and 33 correspond to Figure 29 showing the different positions of the parts thereof.
  • Figure 34 is a top plan view of an apparatus illustrating a modified application of my invention to an oscillating arm scanner.
  • Figure 35 is an elevation partly in cross-section taken along line 35-35 01' Fig. 34.
  • Figure 36 is a cross-sectional view taken along line 36-36 of Figure 34.
  • Figure 37 is an enlarged view of a portion of Figure 35.
  • Figure 38 is a top plan view illustrating a slight modification of the construction 01 Figure 34 as likewise applied to an oscillating scanning arm.
  • Figure 39 is a cross-sectional view partly in elevation taken online 38-39 of Figure 38.
  • Figure 40 is a cross-sectional view partly in elevation taken on line "-46 of Figure 38.
  • Figure 41 is an enlarged view of a portion of Figure 40.
  • Figure 42 is a view taken along line 42-42 of Figure 38.
  • the recorder of this embodiment is arranged for compactness and simplicity of construction and operation consistent with quality high speed recording.
  • the recorder may be designed for mounting in a portable cabinet of a type and size similar, for instance, to a radio console cabinet, a suitcase or other similar stationary or portable article.
  • the recorder arrangement may also be correspondingly spaced for this purpose.
  • styli assemblies 02 are mounted at equidistant points on the chain II at intervals substantially equal to the width of the recording sheet 00.
  • Stylus assemblies 02 are movable in a plane parallel to the base and individually and successively cooperate with the recording sheet once for each revolution of the chain 0 I v .An electric motor.” is supported beneath the recorder base 50 by bracket 01 which in turn is secured to the under side of the recorder base by the bolt 08.
  • Motor 56 is preferably of the nonsynchronous type operable from an alternating or direct current power supply.
  • Motor 00 is coupled to a drive shaft 03 through worm gear arrangement enclosed in housing 00 shown in section in Figure 13. Any suitable coni. nection may be made between the motor 08 and the arrangement enclosed in housing 00.
  • a preferred form shown particularly in Figure 2 is the flexible cable BI which is used to connect the motor shaft with the gearing arrangement.
  • supported beneath the base 50 as seen in Figures 2 and 13 is Figure 4 and will be hereinafter described in connection with .the further description of the procthat the movement of the paper will be exactly responsive to receive cyclic impulses and coopcrates with the driven mechanism to establish a proper phase position for each stylus of each of the stylus assemblies 52 at the beginning of each recording excursion of each of the stylus assemblies.
  • This cyclic synchronizing action which con stitutes the major portion of this invention will be hereinafter described in greater detail 'and will be more fully understood when the action of the various parts of the recordingunit is firstexplained.
  • the motor 58 through the iiexible cable I drives the worm 80 within the housing 00.
  • This worm 00 meshes with the'worm gear 0
  • the shaft 03 is positioned by and rotates in the journals 04 and 05. the end 00 of the shaft 03 being captured in the collar 01, which is connected thereto by the pin 03.
  • Compression spring 09 is located on the shaft 03 between the collar 01 and the thrust bearing 00 and thus serves accurately to position the shaft 03, while it rotates and thus serves further to reduce any possible frictional loss at the base of the housing.
  • the sprocket I3 is not driven directly by the shaft 03 but instead is driven by the hollow shaft or sleeve I00 ( Figure 13) which rotates about the shaft 03 and which is independent of shaft 83.
  • Shaft I00 carries at the upper end thereof, as
  • an insul-atingsleeve II which is secured thereto in any suitable manner as,- for instance, by the screw I02.
  • the insulating sleeve IOI has a. peripheral extension I 03 thereon which, by means of the screws I04 carries the sprocket 53.
  • the sprocket 53 is thus insulatedly supported upon the shaft I00 and when the shaft I00 is driven, the sprocket 03 is caused thereby to rotate and hence to move the chain II in the appropriate direction as is hereinafter described.
  • bearings Iii may be provided for the sleeve I00 in suitable extensions or mountings II of the base 50.
  • the track member II1 is
  • the insulating support II8 mounted on the insulating support II8, serves as a guide for the stylus assemblies in the manner hereinafter described; these members. for this purpose, extend longitudinally along the path of the stylus assemblies and guide the assemblies around the sprockets.
  • the driven synchronized shaft carries a spiral gear I20 ( Figures 13 and 3), which drives the gear I2I.
  • the gears I20 and I2I are the source of power for the .paper drive and hence ensure synchronous with the operation of the scanning device.
  • the gear I2I is keyed to the rod I22 which is mounted in suitable bearings I23 and I24 'on the underside of the base 50.
  • the rotation of the rod I22 results in rotation of the worm at This worm meshes with the gear I36 which in turn is keyed to. rod I01 and hence rotates the same. 10 as well as Figure 3.)
  • Rotatable rod I31 is mounted in appropriate Jbearings I40 and HI, the'bearing I40 being se-- cured by screws I42 to a bracket I43 which in turn is. supported on the base 50 and'the bearing I4I being provided by a suitable bore in the base 50.
  • the rod t31 carries at the opposite end thereof from the gear I36 a worm I60 which meshes (See Figure 3 and especially Figure 10.) Worm gear IGI rotates the paper feed roll I62 in a manner hereinafter to be described.
  • a supporting cabinet indicated by the dotted lines of said figure may be used.
  • the recorder base 50 sets into recesses at the top corners I10 of the bottom section "I.
  • a transparent window I13 may be set above the recording area in order to permit direct viewing of the recording as it is performed; the transparent window may simply be an opening or may have a glass or any other transparent. protective surface.
  • a roll of sensitized paper 200 is mounted beneath the recorder base 50 between the brackets 20I20I (see Figures 2 and 3), The rear side 203 of the cabinet may be hinged at 204 to permit the insertion of the roll of recording paper withbut otherwise making it necessary to disassemble the recorder.
  • the recording sheet 55 passes from the roll 200 Q (See Figure through an opening 205 in the recorder base 58 whence it is then threaded over the guide roll 286 around the platen 281 over the drive roll I62 and onto the take up ml] 238 (see also Figure 11).
  • a plurality of spaced rollers 288, Figures 1, 2, l0, and 11, preferably of rubber are arranged on a rod 289 in such a manner as to press the record sheet 55 against the feed roller I62 during the recording operation.
  • the pressing rod 289 is mounted at either end in sockets 2I8 of the brackets 2i i.
  • the brackets 2 are mounted on the ends of the rod 2I2 (see dotted lines of Figure 1).
  • 3 is at one end secured at 2I4 to the rod 2I2 at the other end at 2I5 biases the brackets 2
  • a crank arm 228 is provided for separating the rubber rollers-288 from the feeding roll I62 when it is desired to thread the sheet 55 between the spring biased pressure rolls 288 and the feed roller H2.
  • a cam or eccentrically positioned disk 22I is arranged on the axis of support of the lever or crank arm 228 and coacts with the finger 222 secured to the rod 2I2.
  • Rotation of the handle 228 results in corresponding rotation of the cam 22I thus raising the finger 22 and thereby rotating the rod 2l2 against the mechanical bias of the springs 2I3 and thereby rotating the brackets 2H and moving the pressure roller 288 away from the feed roller I62.
  • a knurled hard rubber knob 238 (Figure 2) may be secured to the left end of the shaft supporting the feed roller I62.
  • knob 238 feed rollers I62 may be independently driven and record sheet 55 may be advanced until all the recorded matter projects beyond the pressure rollers 208.
  • the recording sheet may then be torn at the region beyond the pressure rollers and the rel,
  • corded matter may then be withdrawn from the facsimile unit by removal of the take up r011 238.
  • the take up roll 238 is removably supported by the drive shaft 248 and the tail stock 24! as will be hereinafter more specifically pointed out.
  • the recording paper in the present invention is positively fed in the appropriate direction for successive line by line scanning and the tension is uniformly maintained across the recording region of the recording sheet 55 no matter how wide the particular sheet may be.
  • the free end 258 of the recording sheet 55 is inserted in the slot 25I in the spool 252 of the take up roll 238.
  • the take up roll 238 is mounted for rotation between the frame up-rights I43-I43 by means of the driving shaft or plate 248 and the tail stock arrangement 24L Drive shaft or plate 248 is connected with the gear 268 through the friction clutch 26l 262 as seen in Figures 1 and 16.
  • Gear 268 is driven through the idler gear 218 by the gear 2H which in turn is mounted upon and rotates with the shaft of the feed roller I62.
  • the gearing ratio between the gear 2'" and the gear 268 is designed to overdrive take up roll 238 to maintain a constant tension in the record sheet 55 during the normal feeding operation of recording.
  • a frictional slip occurs at the over driven feed
  • the feed or drive roll I82 is operated through the gear I8I as heretofore described particularly in connection with Figure 10.
  • Figure 10 shows in section the connection between the gear I GI and the shaft 288 of the feed roll
  • the roller I62 is secured by pins 28I or any other suitable means to the shaft 288, the said shaft 280 being mounted in suitable bushings 282 in the uprights I43.
  • the gear IBI is mounted on the extension 288 of the shaft 288 and is rotatable with respect to said extension.
  • a washer 283 is pinned at the end of the extension 290 of the shaft 288 and abuts the outer end of the hub 284 of the gear I6l in order to retain the gear I6l in fixed axial position.
  • a pawl 285 is mounted near the periphery of the gear Ill and an associated ratchet 288 is pinned to the extension 298 of the shaft 288 in order to effect a positive drive connection between the gear HI and the roller shaft 288.
  • the surface of the feed roll I82 is metallic in order to afford a continuous electrical contact to the recording sheet for electrochemical recording action.
  • the metallic portion of feed roll I62 is connected to ground or frame potential forming the opposite potential to that of the stylusassembly, As seen in Figure 12, engagement of pawl and ratchet 285286 occurs when the gear I6I rotates in a counterclockwise direction. A positive drive is thus effected between the gear I6I and the drive roller I62. In the proper counterclockwise direction during the continuous feeding of the record sheet 55 while a recording is being made thereon.
  • Each stylus of the present invention is rigidly guided when it is in recording position.
  • three individual stylus assembles 52 are shown mounted on the link belt or chain 5
  • affords a rigid positive driving means for the styli.
  • and sprockets 53 and 64 and the guide roll 388 are insulatingly mounted with respect to the remainder of the facsimile unit.
  • the record sheet 55 is at the potential of the frame or base of the unit which is at ground potential.
  • the stylus assembly is insulated from the frame and is at the opposite potential.
  • means are provided for maintaining thechain M at a predetermined tension or tautness. This means, is
  • Figure 2 where means for maintaining the predetermined tension in thelinkbelt orchain "are shown.
  • a compression spring H is arranged to me chanically bias a rod :04 and hence also the member 302 towards the left of Figure 2.
  • Spring "5 is so designed that its force will be sufllcient to keep the belt or chain properly taut ior carry ing the stylus assemblies 52 successively in their recording path by tending to drive the sprocket 54 on its slidable mounting away from the sprocket 53.
  • may automatically be compensated for by the continuous automatic action of the spring 3".
  • is thus effected.
  • a set screw 230 is arranged on the side of member 302 opposite that of the spring M5 and is used to hold member 302 further against spring 315 when it is desired to remove the chain 5
  • Figure is a cross sectional view along line l5l5 through the compensating mounting ior
  • Sprocket 54 is secured to the insulating post or-hub 301 having a concentric bushing 325 rotatably mounted on the rod 323.
  • the slot 33] in the base permits the member 302 to slide back and forth in response to the various tensionlng eil'ects exerted between chain 5
  • the stylus assembly 52 is mounted on the chain 5
  • a similar complementary U-shaped channel 406 is formed at the top of the main stylus support 403 by the plate 401 having the angular dependent flange 403 at one side thereof and the additional flange 403 at the opposite side which registers with the chamfered side 0 of the bracket 40l.
  • Screws 4 pass through openings in the plate 401 into the main support 403.
  • Compression springs 442 are captured between the heads of each of the screws 4 and the upthe plate downwardly and serving to tend to narrow the distance between the base of the U-s'haped' channel 400 and the base of the U-shaped channel 435.
  • a slidable stylus support 420 having projecting rails 42l and 422 is mounted on the main stylus assembly support member 403, the rails 42! and 422 being engaged in .the U-shaped channels 405 and 403.
  • the slidable stylus support carries a rotatable stylus 425 which is I mounted on the shaft 425 which in turn is rotatably carried in the brackets 421.
  • the brackets 421 are as is seen particularly in Figure 7 extensions oi the pivotally mounted member 423 which, as seen in Figures 9 and 11, is spring biased by means of the spring 423 towards such position that the stylus 425 is forced outwardly from the stylus supporting member 403.
  • the slide 420 which supports the stylus is slidable in the channels 405 and 403 and is frictionally retained in such channels by means of the spring pressure of spring 2 upon the plate 401 which tends to'narrow the distance between the bases of the said channels.
  • the support member 403 carries on the under I side thereof the slotted pulleys 430 which engage the rail H1 mounted upon the insulating support 3. These slotted pulleys 430 serve to position the front of the stylus assembly with respect to the rail.
  • the rail of the stylus assembly carries the conical pulleys 43l mounted on the post 432 extending downwardly from the bracket 402.
  • a compression spring 433, is placed between the under side oi the conical roller 43i and the head 434, of the .post 432 and serves to bias the conical roller 43l so that its apex tends to ride close to the under side of the bracket 402.
  • the brackets 401 and 402 are so arranged that a channel 440 is formed therebetween, the said channel registering with the periphery of the sprockets 54 and 53 when the stylus assembly and the portion of the chain upon which it is mounted passes over the said sprockets, the said channel 440 receiving the said sprockets and the stylus assembly being thereby so arranged that it will not in any way interfere with the operation of the chain
  • the lower rail 422 of the stylus carriage 420 may, as is seen in Figures 5 and 7, have a series of teeth 450 therein forming a rack.
  • a gear segment or wheel 45l is pivotally mounted at 452 upon a dependent bracket 453 supported by the main support 403 of the stylus assembly, the said gear segment 45l meshing with the rack 450 and being so arranged that rotation of said gear segment will result in corresponding movement of per side oi the flange plates 401 thus pressing 7 the rack 450 and a corresponding sliding motion of the stylus carrier 426 within the channels 465 and 466 of the stylus assembly 52.
  • the chain is so arranged that when the picture is being received, the said chain is always in continuous motion without any necessity for the chain or any portion of the driving mechanism thereof to come to a stop at that time.
  • the synchronizing apparatus of the present invention does not coact with any of the driving elements whatever of the sprockets and the chain itself and even the movement of the stylus assembly and the supports thereof is constant and continuous during the recording.
  • the slidability of the subsidiary stylus carriage 426 within the U-shaped channels 465 and 466 is the sole means of the permitting synchronization.
  • the synchronizing apparatus operates only upon the subsidiary stylus carriage 426 and does not interfere with the operation of any other portion of the mechanism and in fact is so arranged that should there be any tendency for it to interfere in any other portion of the mechanism or should the stylus carriage 420 be moved to such position that it may tend to be removed from the main support 463 of the stylus assembly 52, then the hold upon the stylus carriage will be released so that the stylus carriage might proceed with the remainder of the mechanism.
  • the synchronizing mechanism comprises the synchronizing magnet H which is mounted in any suitable man- .coact with and when energized to attract the armature 462 the said armature 462 being pivoted at 463 and being biased by the tension spring 464 away from the magnet II.
  • the tension spring 464 is connected at one end to the pin 465 of the armature 462 and atthe other end is connected to the pin 466 which is mounted upon the bracket 46! which in turn is also supported from the base 56.
  • the synchronizing lever 468 is pivotally mounted on the pin 469 which is also supported on the bracket 461.
  • the synchronizing lever 466 is so arranged that the portion 468 thereof is of greater mass and weight than the portion 466a thereof so that the natural tendency of the lever 466 is to rotate in a clockwise direction with respect to Figure 6, its mounting upon the pin 46! being sumciently frictionless in character to permit of such rotation.
  • the lever 466 is so positioned with respect to the stylus assembly 62 that it will abut against only the leading edge of the subsidiary stylus carriagev 426 and will not in any way engage any other portion of the main stylus assembly.
  • the lever 466 is restricted against the counterclockwise movement which the balancing of its weight would otherwise create by the pin 416 of the protective lever 4' which is also pivoted on the pin 469. prises two arms, one arm 41! having increased mass or weight and the other or tripping am “In being of lesser mass or weight, the arms of the lever 4' being so arranged that the two are normally biased to rotate in clockwise direction with respect to Figure 6.
  • the synchronizing lever 466 is arranged in the position shown in Figure 6 where its arm 466a is disclosed in the path of the subsidiary stylus carriage 426 while its arm 466' is supported on the pin 416 of the protective lever "I.
  • the protective lever 41! is so arranged that its arm “la is in the path of the main portion of the stylus assembly 52 and its other arm 4" is supported on the stationary pin- 412.
  • the arm 4660. is arranged atthe beginning of the scanning excursion, that is it is, with respect to Figure 1, set at the left hand side of the sheet 55. Thus it is arranged so that it will interrupt the movement of the stylus carriage 426 at the beginning of each scanning excursion.
  • the chain 5i is moved so that stylus assembly 52 arrives at the beginning of a scanning excursion, the chain 5
  • the arm 468a however is so arranged that it will abut against the leading edge of the subsidiary stylus carriage 426 and hold the said subsidiary stylus carriage 426 stationary with respect to the left hand side of the sheet and hence stationary with respect to the beginning of the scanning line.
  • the subsidiary stylus carriage 426 will slide in the U-shaped channels 465 and 466 of the main stylus assembly and will continue assembly 52 have reached the synchronizing arm 468 so that the leading edge of the subsidiary stylus carriage 426 contacted the said arm at the
  • the protective lever 4'" also comsembly 52 was in the positionshown by the dotted lines, then although the stylus assembly their movement to the position shown by the solid lines, the subsidiary stylus carriage by reason of r 2,290,274 time when the right hand end of the stylus as- 1 Accordingly, in ordinary operation unless substantial accidental mlsphasing of a serious and V unusual type should occur the arm 4'Ila should 7 52 and the chain will have nevertheless continued the fact that itwas thus held stationary will have with respect to the stylus assembly 52, been apparently moved backwards to await the synchronizing impulse which would permit it to commence its scanning excursion.
  • the magnet H On receipt of a synchronizing impulse, the magnet H is energized and attracts the armature 452. When the armature 402 is attracted, the detent 48l is pulled away from the pawl 402 and nothing now prevents counterclockwise rotation of the lever 450.
  • the frictional engagement of the plate 401 against the subsidiary stylus carriage 420 is such that while it will yield and permit the stylus carriage to move backward with respect to the stylus rarely comeinto operation for the purpose herein'described but it is present as a safety factor in order to prevent the subsidiary stylus carriage 420 which is very light in weight and very small in size from being accidentally removed from the stylus assembly 52 and'thus becoming lost.
  • the synchronizing magnet II is energized upon the receipt of synchronizing impulses in order to operate the synchronizing levers and in order to release the synchronizing lever 468 to permit the subsidiary stylus carriage '420 to begin the scanning excursion.
  • the current must be made to flow through the magnet Ii in time to receive the synchronizing impulse.
  • the driven shaft I00 ( Figure 13) of the sprocket 53 which drives the chain carries a earn 500 -( Figures 13 and 14) which is arranged, to disconnect the current from the stylus assembly and to make the circuit to the synchronizing magnet whenever a scanning excursion is com-'- assembly when the lever arm 460 is held in fixed position, it will nevertheless permit the stylus carriage to move forward with the stylus assembly and to movethe lever arm 4600 out of the way when the opposite end 48I of the lever 460 isnot engaged by the detent 48l.
  • the arm 41Ia of the lever 4' is so arranged that it will contact the mainor unslidable portion of the stylus assembly.
  • the chamfered portion 405 of the arm 4ll' of the lever 4' will then strike the pin 486 of the armature 462 and owing to the counterclockwise rotation of the lever 4" move the pin towards the synchronizing magnet II and accordingly therefore likewise move the armature 462 in that direction in order to disengage the pawl 482 of the arm 460' of the lever 460, thus releasing the subsidiary stylus carriage 420 from the stopping action of the arm- 458a, and hence permitting the stylus carriage to continue its movement with thestylus assembly 52.
  • the arm 411a of the lever 4' is so spaced and arranged that it will not merely engage the main pleted and whenever a synchronizing impulse is thus to be received.
  • the cam 500 has a lug 50! extending therefrom for this purpose.
  • a rod 502 is carried in an opening 503 of the base 50 and is so arranged that one end thereof bears against the cam 500 and the other end thereof bears against the central contact 504 of a cam switch 505.
  • the central contact 504 of the cam switch 505 is spring biased in such manner that it tends always to drive the rod 502 against the side of the I cam 500. Normally the current flows from con% tact 504 into contact 500 of the cam switch 505 in order to energize the tyli and to record the pulse to be received and to be impressed upon the synchronizing magnet and hence to permit the starting of the scanning excursion at the proper moment.
  • the subsidiary stylus carriage 420 need not be more than a gram or two in weight and is of the relatively small size and mass shown in Figures 1, 6 and 8.
  • cam switch of Figure 14 and the manner of actuation thereof is such that for most practical purposes and ordinary utilization of my invention the circuit will be changed so that the synchronizing means will be energized by the synchronizing impulse and so that the current will not flow through the styll when the synchronizing impulse is received.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Fax Reproducing Arrangements (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)
  • Facsimiles In General (AREA)
US334404A 1940-05-10 1940-05-10 Facsimile recorder Expired - Lifetime US2296274A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR962503D FR962503A (enrdf_load_html_response) 1940-05-10
US334404A US2296274A (en) 1940-05-10 1940-05-10 Facsimile recorder
US459319A US2374673A (en) 1940-05-10 1942-09-22 Facsimile recorder
US585466A US2464970A (en) 1940-05-10 1945-03-29 Facsimile recording stylus

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US334404A US2296274A (en) 1940-05-10 1940-05-10 Facsimile recorder
US352937A US2290230A (en) 1940-08-16 1940-08-16 Stylus mounting
US459319A US2374673A (en) 1940-05-10 1942-09-22 Facsimile recorder
US585466A US2464970A (en) 1940-05-10 1945-03-29 Facsimile recording stylus

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US2296274A true US2296274A (en) 1942-09-22

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US459319A Expired - Lifetime US2374673A (en) 1940-05-10 1942-09-22 Facsimile recorder
US585466A Expired - Lifetime US2464970A (en) 1940-05-10 1945-03-29 Facsimile recording stylus

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US459319A Expired - Lifetime US2374673A (en) 1940-05-10 1942-09-22 Facsimile recorder
US585466A Expired - Lifetime US2464970A (en) 1940-05-10 1945-03-29 Facsimile recording stylus

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2435250A (en) * 1944-02-25 1948-02-03 Western Union Telegraph Co Inside scanning facsimile recorder
US2514289A (en) * 1946-06-11 1950-07-04 Us Navy Recognition trainer
US2587145A (en) * 1947-11-28 1952-02-26 Boris F Grib Continuous facsimile scanner
US2614900A (en) * 1948-02-16 1952-10-21 Airspeed Ltd Recording instrument and equipment
US2643174A (en) * 1949-10-13 1953-06-23 Times Facsimile Corp Facsimile stylus carrier and drive system
US3121138A (en) * 1959-05-28 1964-02-11 Gerald G Murphy Continuous scanning apparatus
US3445587A (en) * 1965-10-01 1969-05-20 Xerox Corp Recording stylus control system

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2548583A (en) * 1947-12-26 1951-04-10 Gen Electric Automatic cleaner for sparking styluses
US2715055A (en) * 1949-10-06 1955-08-09 Raytheon Mfg Co Depth sounder recorder marking means
BE497762A (enrdf_load_html_response) * 1949-10-06
US2643932A (en) * 1950-08-01 1953-06-30 Sun Oil Co Wind direction recorder
BE518824A (enrdf_load_html_response) * 1952-03-29
US2743989A (en) * 1952-06-10 1956-05-01 Faximile Inc Facsimile recorder
US2879129A (en) * 1953-03-19 1959-03-24 Alden Milton Recording electrode
US3166752A (en) * 1959-12-04 1965-01-19 Motorola Inc Page printing device utilizing a scanning electrode structure
US3427633A (en) * 1964-05-04 1969-02-11 Motorola Inc Page printing device with marking material bearing web between scanning styli and record medium
US3291920A (en) * 1965-01-12 1966-12-13 Hauser Fred Recording and reproducing machine
US4060815A (en) * 1976-12-29 1977-11-29 Alden Research Foundation Electrical recorder and belt with styli therefor
US5337120A (en) * 1992-09-14 1994-08-09 Eastman Kodak Company Scanning apparatus gate drive system and method
US5418597A (en) * 1992-09-14 1995-05-23 Eastman Kodak Company Clamping arrangement for film scanning apparatus
US5313249A (en) * 1992-09-14 1994-05-17 Eastman Kodak Company Arc-segment-shaped gate for photographic film scanning apparatus

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US476374A (en) * 1892-06-07 Reco rdi n g-therm o m eter
US709313A (en) * 1901-11-23 1902-09-16 Thomas Tapley Helenus Ferguson Surveying instrument.
US1352150A (en) * 1919-03-31 1920-09-07 Schneider & Cie Recorder for fluid-pressure presses
US1771272A (en) * 1923-12-15 1930-07-22 Landis & Gyr Sa Writing appliance for recording apparatus
US2081579A (en) * 1931-12-08 1937-05-25 Baldwin Southwark Corp Recording instrument

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2435250A (en) * 1944-02-25 1948-02-03 Western Union Telegraph Co Inside scanning facsimile recorder
US2514289A (en) * 1946-06-11 1950-07-04 Us Navy Recognition trainer
US2587145A (en) * 1947-11-28 1952-02-26 Boris F Grib Continuous facsimile scanner
US2614900A (en) * 1948-02-16 1952-10-21 Airspeed Ltd Recording instrument and equipment
US2643174A (en) * 1949-10-13 1953-06-23 Times Facsimile Corp Facsimile stylus carrier and drive system
US3121138A (en) * 1959-05-28 1964-02-11 Gerald G Murphy Continuous scanning apparatus
US3445587A (en) * 1965-10-01 1969-05-20 Xerox Corp Recording stylus control system

Also Published As

Publication number Publication date
FR962503A (enrdf_load_html_response) 1950-06-14
US2464970A (en) 1949-03-22
US2374673A (en) 1945-05-01

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