US762424A - Curtain-shutter. - Google Patents

Curtain-shutter. Download PDF

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US762424A
US762424A US18636503A US1903186365A US762424A US 762424 A US762424 A US 762424A US 18636503 A US18636503 A US 18636503A US 1903186365 A US1903186365 A US 1903186365A US 762424 A US762424 A US 762424A
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rollers
spring
frame
roller
wound
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US18636503A
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Harvey W Locke
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CENTURY CAMERA Co
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CENTURY CAMERA Co
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    • 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
    • G03B9/00—Exposure-making shutters; Diaphragms
    • G03B9/08—Shutters
    • G03B9/28—Roller blind or flexible plate
    • G03B9/32—Double blind
    • G03B9/34—Double blind with adjustable slot; with mechanism controlling relative movement of blinds to form slot

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  • This invention relates to curtain-shutters y adapted, preferably, for use in the focal plane of cameras.
  • Figure 1 is an elevation, pitly in section, of a mechanism embodying the invention.
  • 2 2 of Fig. 1. 3 3 of Fig. 1; and Figs. 4, 5, 6, 7, and 8 are views of details.
  • l 1 1 arey the top and bottom rails ofthe rectangular frame for the shutter.
  • 2 and 3 are the vertical side rails thereof.
  • One blind, 4 is rolled upon and unrolled from a roller 5 and has narrow bands 6 and 7 attached to its outer corners that are rolled upon an automatic spring-roller 8 in the lower part of the frame.
  • - Theother blind,'9, is rolled Jpon and unrolled from an automatic springroller 10 in thelower part of the case and has nar-- row bands 11 and 12 attached to its outer corners that are rolled upon a roller 13 in the upper part of the frame.
  • Mechanism is provided for operatingfthe rollers, and vthereby the blinds.
  • Fig. 2 is a section on the line
  • Fig. 3 is a section on the linethe lower portion of the shutter-opening
  • the roller 13 is released while the roller 5 is held fixed, the blind 9 will be rolled upon the roller 10, so-that the shutter will be openedwide.v If next the roller5isreleased, the blind 4 will be pulled toward the roller 8, so that the opening will-be closed. The time between the release of the roller 13 and the release of the roller 5 will determine the length of this time exposure.
  • the operating mechanism of this shutter is as follows:
  • the roller 13 has a shaft 16, carrying a pinion that meshes with a second pinion 18, which latter pinion meshes with a pinion 19, Fig. 1, on-the shaft 2() of the roller 5.
  • These shafts and pinions are supported on a plate 21, attached to the shutter-frame.
  • shaft 20 carries also aratchet-disk 22 for en-A gagement with a spring-operated dog 23, pivoted on the plate 21 and actuated in one direction by a spring 24 and in the other direction by the plunger 25 of an' air-engine that is controlled in the usual way by a bulb 26.
  • the shaft 16 passes through aperforation in the plate 21 of such size that it permits the movement of the shaft far enough to disengage the teeth of the pinion 17 from the teeth of the pinion 18, and the end of the shaft 16 rests in a movable plate 27 pivoted at 28v to the plate 21. and provided with means for limiting its movement, such as the pin 29 movable in a roller or slot in the plate 21.
  • the movable plate 27 may have a 'handle 30 and is moved in the direction to maintain engagement between the pinions 17 and 18 by means of a spring 31.
  • the spring-rollers 8 and 1() are of wellknown construction, at least in so far as each roller is hollow, and has a spring 32 attached to the roller and to a stationary shaft on which the rollerfturns, so that by revolvmg' the roller itself withl reference to -the shaft the spring 32 is wound up and put under ten.
  • the roller-8 has a shaft 33, which at one end carries a pinion 34, that mesheswith a pinion 35 and which in turn meshes with a pinion 36 ⁇ Iupon the shaft 37 of the roller 10.
  • j Either the shaft 33 or the shaft 37 has upon it-a milled head 38 for turning it .1o in order to increase the tension of the springs 32 ofl the two rollers. Said milled head is held by means .of aV split ring. 39, fastened to -the plate 40, which is the plate that constif tutes the bearing for the shafts 33 and 37 and I5 qcarries the pinion 35.
  • the split ring 39 has lts free end bent out from the plane of the remainder of the ring, so that said 'end may engage in notchesV on fthe milled head 38.
  • the spring 32v the freeend of the ring 39 engages in the successive notches'in the. head 38, thereby preventingthe unwinding of the spring, and since .the shafts 37 and 33 are geared together as just described both springs are wound up in the same direction.
  • the opposite end of the shaft 33 carries a small pinion 41, that engages a disk 42, pivoted to'turn an axis 43 on-a plate 44 on the outside of the frame.
  • the disk 42 has numerals arranged around its periphery, and the .position of said as the pinion 41, indicates the tension'of the spring 32.
  • the roller 13 isfrendered free to which causes the plunger 25 of the air-engine to disengage the dog 23 from the ratchet-disk 22 on the shaft 20, thereby releasing the spring rollers 8 and 10, so that they wind up, 'respectively, the bands and 7, attached to the blind 4 and the blind 9.
  • the blinds 4 and 9 lare released,” so4 that they are -drawn successively across the 'shutter-opening.
  • the lmovable'plate 27 is first tilted by'its handle 30, thereby releasing the shaft 16, so that the spring-roller ⁇ -10 will pull -down the outer blind 9 and expose the plate.
  • What 1 claim is.-' l 1. The combination of a frame; a'pair of adjacent spring.- rollers, supported in said frame; means for adjusting the tension of the springs in said springrollers;'a-flexible blind wound on one of said'spring-rllers; a pair of flexible bands, wound on theother' of said spring-rollers; a pair of adjacent rollers at a suitable distance from saidspring-,rol-lers, also supported in' said frame; a second flexible blind wound on one of said last-mentioned rollers and connected to the bands thatare wound on', one of said spring-rillers;A a second pair of exible bands wound on theother of the two last-mentioned rollers and connected to the blind that is wound on nenof said spring-rollr ers; a gearing connecti n between the other two rollers; mean-s for locking one of said last-mentioned rollersagainst rotation; means for releasing said last-mentioned roller from said locking means for
  • I 2 The combination of a frame; a pairof adjacent spring rollers supported in said frame; means for adjusting the tension of the springs ⁇ in said rollers; a flexible blind wound on one of said spring-rollers; a pair .of ilexi- 'ble bands wound on the other of said springrollers;..a plate pivotally supported on 'one side of said frame; -a pair of adjacent rollers at a suitable distance from said spring-rollers, oneo which is supportedat both ends in said frame and the other of which is supported at 1 2 one end in'said frame and at the -other end in said plate; Va second iiexible blind' wound on one ofsaid last-mentionedurollers and connetedmo the bands thatare woundon one of said spring-rollers; a second pair ofl flexible bands wound on the other of the two last'- mentioned rollers and connected to the blind that is wound on one of said spring-rollers; a
  • one of said rollers carrying-a ratchet-disk; -a dog pivoted on said frame; a spring adapted to actuate said-.dog in one direction to engage said ratchet-disk; an air-engine having a plungeradapted to actuate'. said dog to release said disk; a second 'flexible blind wound on one of said last-mentioned rollers, and connected to theb'ands that are Wound on one of said spring-rollers; a second pair of flexible bands wound on the'other of the two last-mentioned rollers, and connectedto the blind that is wound on one of said spring-rollers; a gearing connection between ythe last-described rollers; and means 5.
  • the roller 13 on its shaft 16 revolubly supported at one end in said frame, and at the other end in said plate 2l.
  • the said shaft 16 carrying the pinion 17;
  • the roller 5 on .its shaft 2O revolubly supported at both ends in said frame, and carrying the pinion 19;
  • pinion 18 supported on said plate 21, and adapted -to be interposed between said pinions 17 and 19; a spring adapted to move said plate 21 in the direction to maitainengagement between the pinions 17 and 18; means for tilting the said plate whereby said last-mentioned pinions are disengaged; a flexible blind 4 Wound on said roller 5, and connected to the bands 6 and 7; a pair of flexible bands 11 and 12 wound on the roller 13,. and connected to the blind 9; means for locking the roller 5 against rotation; and means for releasingl said roller 5 from said locking means; substantially as shown and described.
  • roller 13 revolubly 'supported atene endv of said frame, and at the other end in said plate 21, and carrying ⁇ the pinion 17; the roller 5 revolubly supported at both ends in .said

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)

Description

No. 762,424. PATENTED JUNE 14, 1904. H. W. LOGKE. CURTAIN SHUTTER.
APPLICATION FILED DBO. 23, 1903.
'UNITED STATES CAMERA COMPANY, OF ROCHEST NEW YORK.
` Patented June 14, 1904.
PATENT OFFICE.
HARVEY W. LOCKE, OF ROCHESTER, NEW YORK, ASSIGNORTO CENTURY i ER, NEW YORK, A CORPORATION OF CURTAIN-SHUTTEFK.
SPECIFICATION forming part of Letters Patent No.Y 762,424, dated J u ne 14, 1904.
Application filed December Z3, 1903. Serial No. 186,365. (No model.)
I To ali/. 111710111- ft 11m/1j concern,.-
Be it known that I, HARVEY W. Locxn, a citizen of the United States, and a resident of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Curtain-Shutters, of which the following is a specification.
This invention relates to curtain-shutters y adapted, preferably, for use in the focal plane of cameras.
It consists in the mechanism hereinafter described and claimed.
/ln the drawings, Figure 1 is an elevation, pitly in section, of a mechanism embodying the invention. 2 2 of Fig. 1. 3 3 of Fig. 1; and Figs. 4, 5, 6, 7, and 8 are views of details.
In the drawings,l 1 1 arey the top and bottom rails ofthe rectangular frame for the shutter. 2 and 3 are the vertical side rails thereof. Within this frame are supported four rollers foroperating two iiexible blinds.V One blind, 4, is rolled upon and unrolled from a roller 5 and has narrow bands 6 and 7 attached to its outer corners that are rolled upon an automatic spring-roller 8 in the lower part of the frame.- Theother blind,'9,is rolled Jpon and unrolled from an automatic springroller 10 in thelower part of the case and has nar-- row bands 11 and 12 attached to its outer corners that are rolled upon a roller 13 in the upper part of the frame. Mechanism is provided for operatingfthe rollers, and vthereby the blinds. v
The principle of the mechanism thus far described is as follows: If'the blind 4 remains stationary and the roller 13 is turned in one direction or the other, thereby moving the blind 9, the exposure-gap between the edges 14 and 15 of Ithe blinds 4 and 9 can he enlarged Aor diminished. The spring-rollers 8 and 1() if they have been put under suicient tension will move the blinds 4 and 9 simultaneously, since they are geared together,.
Fig. 2 is a section on the line Fig. 3 is a section on the linethe lower portion of the shutter-opening,
thereby exposing the plate. f If the tension ot'- either or both of the springs in the blinds 4 and 9 is increased or diminished, the speed of movement ot' the exposure-gap is correspondingly changed. When the rollers 13 and 5 wind, respectively, the bands 11 and 12 of the blind 9 and the blind 4 to the upper part of the casing, the device is ready for use,
If, then, the roller 13 is released while the roller 5 is held fixed, the blind 9 will be rolled upon the roller 10, so-that the shutter will be openedwide.v If next the roller5isreleased, the blind 4 will be pulled toward the roller 8, so that the opening will-be closed. The time between the release of the roller 13 and the release of the roller 5 will determine the length of this time exposure.
'The operating mechanism of this shutter is as follows: The roller 13 has a shaft 16, carrying a pinion that meshes with a second pinion 18, which latter pinion meshes with a pinion 19, Fig. 1, on-the shaft 2() of the roller 5. These shafts and pinions are supported on a plate 21, attached to the shutter-frame. The
shaft 20 carries also aratchet-disk 22 for en-A gagement with a spring-operated dog 23, pivoted on the plate 21 and actuated in one direction by a spring 24 and in the other direction by the plunger 25 of an' air-engine that is controlled in the usual way by a bulb 26. The shaft 16 passes through aperforation in the plate 21 of such size that it permits the movement of the shaft far enough to disengage the teeth of the pinion 17 from the teeth of the pinion 18, and the end of the shaft 16 rests in a movable plate 27 pivoted at 28v to the plate 21. and provided with means for limiting its movement, such as the pin 29 movable in a roller or slot in the plate 21. The movable plate 27 may have a 'handle 30 and is moved in the direction to maintain engagement between the pinions 17 and 18 by means of a spring 31. I
` The spring-rollers 8 and 1() are of wellknown construction, at least in so far as each roller is hollow, and has a spring 32 attached to the roller and to a stationary shaft on which the rollerfturns, so that by revolvmg' the roller itself withl reference to -the shaft the spring 32 is wound up and put under ten.
- sion-for operation. The roller-8 has a shaft 33, which at one end carries a pinion 34, that mesheswith a pinion 35 and which in turn meshes with a pinion 36`Iupon the shaft 37 of the roller 10. j Either the shaft 33 or the shaft 37 has upon it-a milled head 38 for turning it .1o in order to increase the tension of the springs 32 ofl the two rollers. Said milled head is held by means .of aV split ring. 39, fastened to -the plate 40, which is the plate that constif tutes the bearing for the shafts 33 and 37 and I5 qcarries the pinion 35. The split ring 39 has lts free end bent out from the plane of the remainder of the ring, so that said 'end may engage in notchesV on fthe milled head 38. As the milledhead 38 is turnedso that it winds up. the spring 32v the freeend of the ring 39 engages in the successive notches'in the. head 38, thereby preventingthe unwinding of the spring, and since .the shafts 37 and 33 are geared together as just described both springs are wound up in the same direction. When the free end of the ring 39 is pressed in, it is released from the head 38, so that the tension- L o f the-spring 32 may belet down. The opposite end of the shaft 33 carries a small pinion 41, that engages a disk 42, pivoted to'turn an axis 43 on-a plate 44 on the outside of the frame. The disk 42 has numerals arranged around its periphery, and the .position of said as the pinion 41, indicates the tension'of the spring 32.
.- on the end of nagaan 161s a mined had 45 for operating said 'shaft andalso a'disk 46, carrying numerals upon its edge. Theend of 49 the shaft 20 carries a'disk 47 adjacent'to the lowing the blind 9 to be vwound to a suitable. A degree upon the roller 10 bythis'action of the spring in theroller 10 the exposure-opening bctweenfthe'edges 14 and 15 isv increased and by. turning the milled' head in the opposite direc'tion it isdiminished. The marker on the I 6 disk 47 should point upward, so that it will .indicate the Vwidth-of the exposure-opening v by reference to the proper numeral on -the disk46.
ljor instantaneous .exposures the shutters 4v65 are Vipintedfbymere ly 3Y pressing the bulb,
numerals with referenceto a fixed'point, such',
disk 46 and is 'provided with a marker or- Thus the roller 13 isfrendered free to which causes the plunger 25 of the air-engine to disengage the dog 23 from the ratchet-disk 22 on the shaft 20, thereby releasing the spring rollers 8 and 10, so that they wind up, 'respectively, the bands and 7, attached to the blind 4 and the blind 9. For time exposures the blinds 4 and 9 lare released," so4 that they are -drawn successively across the 'shutter-opening. To accomplish this, the lmovable'plate 27 is first tilted by'its handle 30, thereby releasing the shaft 16, so that the spring-roller` -10 will pull -down the outer blind 9 and expose the plate. Then to close the blind tilt irst the lever, as before, thereby disengaging the roller 5 from the roller 13, and then press 3Q the bulb, thereby releasing the shaft 20 of the roller 5 from the dog 23, so that the springroll 8 is free to pull down the 'other blind 4, thereby`cornpleting the exposure.
What 1 claim is.-' l 1. The combination of a frame; a'pair of adjacent spring.- rollers, supported in said frame; means for adjusting the tension of the springs in said springrollers;'a-flexible blind wound on one of said'spring-rllers; a pair of flexible bands, wound on theother' of said spring-rollers; a pair of adjacent rollers at a suitable distance from saidspring-,rol-lers, also supported in' said frame; a second flexible blind wound on one of said last-mentioned rollers and connected to the bands thatare wound on', one of said spring-rillers;A a second pair of exible bands wound on theother of the two last-mentioned rollers and connected to the blind that is wound on nenof said spring-rollr ers; a gearing connecti n between the other two rollers; mean-s for locking one of said last-mentioned rollersagainst rotation; means for releasing said last-mentioned roller from said locking means for releasing both blinds; and means' for disconnectingsaid gearing connection for releasing one of 'said blinds for the purpose of adjusting the width of the open- -ing'between'the edges of said blinds.
I 2. The combination of a frame; a pairof adjacent spring rollers supported in said frame; means for adjusting the tension of the springs `in said rollers; a flexible blind wound on one of said spring-rollers; a pair .of ilexi- 'ble bands wound on the other of said springrollers;..a plate pivotally supported on 'one side of said frame; -a pair of adjacent rollers at a suitable distance from said spring-rollers, oneo which is supportedat both ends in said frame and the other of which is supported at 1 2 one end in'said frame and at the -other end in said plate; Va second iiexible blind' wound on one ofsaid last-mentionedurollers and connetedmo the bands thatare woundon one of said spring-rollers; a second pair ofl flexible bands wound on the other of the two last'- mentioned rollers and connected to the blind that is wound on one of said spring-rollers; a
vloo
.- gearing connection "between the other two rollers; means for vlocking against rotation 13 that one ot' said last-mentioned rollers that is supported at both ends in said frame; means for releasing said last-mentioned roller from said locking means for releasing both blinds; and means for tilting said pi votally-supported plate whereby the gearing connection between said last -mentioned rollers is disconnected for the purpose of adjusting the width of the opening between the edges of said blinds.
3.- The combination of a frame; a pair of adjacentv spring rollers supported in said frame; means for adjusting the tension of the springs in said spring-rollers; a flexible blind wound on one of said spring-rollers; a
I5 (pair of flexible bands wound on the other of saidspring-rollers; a 'plate pivotally supported on the side of said frame; a pair of adjacent rollers at a suitable distance from said spring-rollers, each carrying a pinion at one end, one of said rollers Vbeing supported at both ends in said frame, land the other of said rollers being supported at one end in said frame, and at the other end in said pivotally-supported plate: a pinion supported on said plate, and adapted to mesh with the pinions on said rollers; means for tilting said plate whereby the pinion on the roller supported' thereby is disconnected from said intermediate pinion; a second flexible blind Wound on one of said last-mentioned rollers, andlconnected .to the bands that are Wound on one of ysaid spring-rollers; a second-pair of flexible bands wound on the other of the two lastmentioned rollers, and connected to the blind that is wound 0n one of said spring.- rollers; means for locking against rotation that one of said last-described rollers that is supported at both ends in said frame; and means for releasing said last-mentioned spring-roller from said locking means.
4. The combination of a frame; a pair of' adjacent spring-rollers supported in said frame; means for adjusting the tension of the springs in said spring-rollers; a flexiblelblind wound on one of said spring-rollers; a pair of flexible bands wound on the other of said rollers; a pair'vof adjacent rollers at a suitable e distance from said spring-rollers, also sup- V ,tween said last-mentioned rollers.
ported in said frame, one of said rollers carrying-a ratchet-disk; -a dog pivoted on said frame; a spring adapted to actuate said-.dog in one direction to engage said ratchet-disk; an air-engine having a plungeradapted to actuate'. said dog to release said disk; a second 'flexible blind wound on one of said last-mentioned rollers, and connected to theb'ands that are Wound on one of said spring-rollers; a second pair of flexible bands wound on the'other of the two last-mentioned rollers, and connectedto the blind that is wound on one of said spring-rollers; a gearing connection between ythe last-described rollers; and means 5. YThekombination oi a frame; apair of adjacent springrollers supported in said Jframe; means for adjusting the tension of the springs in said spring-rollers; av flexible blind wound on one of said spring-rollers; apair of flexible. bands wound on the other of said spring-rollers; a plate pivotally supported on the side'of said frame; a pair of adjacent rolllers at a suitable distance from said springrollers, each carrying a pinion at one end, one of said rollers being supported at both ends in said frame, and carrying a ratchetdisk, and the other of said rollers being supported at one end in said frame and at the other end in said pivotally-supported plate; a pinion supported on said plate and adapted to .mesh with the pinions on said rollers; means for tilting said plate whereby the pinion on theroller supported thereby is disconnected from the pinion on said plate; a dog pivoted on said frame; a springadapt'ed to actuate said dog in one direction to-engage said ratchet-disk; an air-engine having a plunger adapted to actuate said dog to release said disk; asecond flexible blind wound on one or' said last-mentioned rollers, and yconnected to 6. The combination of a frame, the vspringrollers 8 and 10 supported in said frame; means for adjusting the tensioh of the springs in said spring-rollers; the flexible blind 9 wound on said spring -rollers 10'; the pair yoli' llexible bands 6 and 7 Wound on said spring-roller 8;
IOO
the plate 21 pivotally supported on said frame; f i
,the roller 13 on its shaft 16 revolubly supported at one end in said frame, and at the other end in said plate 2l. the said shaft 16 carrying the pinion 17; the roller 5 on .its shaft 2O revolubly supported at both ends in said frame, and carrying the pinion 19; the
pinion 18 supported on said plate 21, and adapted -to be interposed between said pinions 17 and 19; a spring adapted to move said plate 21 in the direction to maitainengagement between the pinions 17 and 18; means for tilting the said plate whereby said last-mentioned pinions are disengaged; a flexible blind 4 Wound on said roller 5, and connected to the bands 6 and 7; a pair of flexible bands 11 and 12 wound on the roller 13,. and connected to the blind 9; means for locking the roller 5 against rotation; and means for releasingl said roller 5 from said locking means; substantially as shown and described.
` 7. The combination of av frame, the spring- IIO rollers 8 and 10 supportedin said frame; means I for adjusting the tension of the springs in said spring-rollers; the flexible blind^9 Wound on said spring-roller 10; the llexible bands 6 and 7 wound on said spring-roller 8;'the roller 13 revolubly'supported in said frame; the roller 5 revolubly supported in said frame, and carrying the ratchet-disk 22; lthe dog 23 pi-voted on s d frame; aspringadapted to actuate said dog -in one direction to engage said ratchetdisk; the air-engine 25 having a plunger adapt- 5 ed to actuate said dog 23 to release said disk; the flexible blind 4 Wound on said roller 5, andv connected to said bands 6 and 7; the bands 11,
and 12 Wound on said roller 13, and connected to said blind 9; agearing connection between i 1o the rollers 5 and 13; and means for disconnecting said gearing. connection between said Vrollers 5 and-13; substantially as shown and described. l W
8. The combination of a frame; the springl 5 rollers Sand 10 revolubly supported in saidv frame; means for adjusting the tension of the springs in said spring-rollers; the flexible' blind 9 Wound on said roller 10; the flexible hands 6 and 7 wound on said spring-roller 8;v
the plate 21 pivotally supported on said frame;
the roller 13 revolubly 'supported atene endv of said frame, and at the other end in said plate 21, and carrying` the pinion 17; the roller 5 revolubly supported at both ends in .said
- y 25' frame, and carrying the pinion 19, and the ion 18; the dog 23 pivoted on said frame; a
spring adapted toactuatc said'dog in onedirection to engage Saidratchet-disk 22; the air- .whereby said shafts are eausedfto rotate in enginey25, having a plunger'adapt'ed to ac-w 35 tuate said dog'v to' release said disk; the iexii y ble blind 4 wound on said roller 5, and connected to the bands 6 and 7; and the flexible .bands 11 and 12 wound on saidroller 13 and f connected to the blind 9; substantially as shown 4 and described. V
9. The combination of a' frame, a pair ofI adjacent shafts revolubly-supported therein,
each carrying a pinion; rollers revoluble upon said shafts, respectively; springs within said 45 the same direction; means for rotating one of said shafts; vand a lock adapted tofhold said shafts against rotation. gv
10. The combination of a frame; a pair of shafts revol u bly supported in said frame, each carrying a pinion;- rollers upon -said shafts, respectively; springs Within said rollers, attached at one end to vsaid `rollers and at the other to the shaft; a pinion supported on said frame and interposed between said pinions on said shafts; a head upon one of said shafts'having a stop thereon; and a spring-ring attached to said gframe and having a free end adapted to engage the stop on said head.
HARVEY W. LOCKE.v Witnesses: v f
- D. GURNEE, L. THoN.
US18636503A 1903-12-23 1903-12-23 Curtain-shutter. Expired - Lifetime US762424A (en)

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