US2157540A - Cyclometer clock - Google Patents

Description

May 9, 1939.

N. G. HORWITT CYCLOMETER. CLOCK Original Filed May 13, 1936 4 Sheets-Sheet 1 INVENTOR Maf/70H6, b'wf BY M May 9, 1939- N. G. HoRwlTT 2,157,540

CYCLOMETER CLOCK Original Filed May 13, 1936 4 Sheets-SheerI 2 INVENTOR ATTO R N EY May 9, 1939- N. G. HoRwnjTl 2,157,540

CYCLOMETER CLOCKv Original Filed May l5, 1936 4 Sheets-Sheet 3 BY /t/ Y ATTORNE? May 9, 1939- N. G. HoR-wlTT 2,157,540

CYCLOMETER `CLOCK Original Filed May 13, 1936 4 Sheets-Sheet 4 A lNvENToR Naf/rd 6. Hong/'ft Patented May 9, 1939 UNITED STATES PATENT ori-ics Application May 13, 1936, Serial No. 79,449

Renewed October 3. 1938 l lis calm. I(ci. ss-izs) This invention relates to a cyclometer clock having a construction which enables the hour numerals to be very large in proportion to the Asize of the clock. A small clock of my con- 3. struction will have these numerals legible at a considerable distance. .In clocks having all cylindrical dials or drums, the numerals are marked on the periphery o1 the cylindrical drums which are placed next to each other about the same horizontal axis of rotation. These drums require a bulky case and crowd the driving mechanism. In. my mechanism there is only one ring dial or drum, the one used for the hour numerals. My hour drum preferably rotates about a vertical l5. axis enabling the numerals marked on its periphery to be increased in height without substantially increasing the size of the clock. Numerals are normally higher than wide, so that much larger numerals can be used on my hour drum than in those of previous clocks, such as that shown in Patent No. 1,991,241, because the Widthand not the height of the numerals is the con-a trolling factor in the diameter of my drum.

My preferred form has a casing with a spherical surface, said casing comprising a complete sphere or a part of a sphere. In said casing an hour drum is rotatably mounted, said drum being in the form of a spherical zone with hour numerals on its periphery. There is an opening in the front of the casing through which the successive hour numerals are exposed. A ring of minute numerals are marked on the front of the casing about said opening, and means are provided to point out or indicate the successive minute numerals. The minute indicating means is preferably a rotatably mounted plate having an opening therein concentric with the opening' in the casing, said plate having a spherical surface and a window in it which travels around in front of the minute numerals, successively exposing them.- The position of this window corresponds at any time to the position of the minutehand on the ordinary type of clock, making it unnecessary to change age old habits of time telling. Contrasting colors used between that of the minute numerals or their background land that of the minute disc, will aid an observer at a considerable distance to estimate the time by the position of the Window, even if he cannot read Vthe minute numerals. A light behind translucent minute numerals exposed at the window is also effective in estimating the time at a distance.

The construction of my clock avoids the annoyance of the constant clicking present in clocks having' a cylindrical drum for the minutes, Where the drum is given a jump at the end of each minute. Only once an hour is there a click in my clock, as the hour ring or drum jumps at the end of an hour to expose the next hour numeral, my minute disc preferably being given a con- 5 tinuous rotation.

My clock may be constructed in a number of forms. Instead of having the means for .presenting the hour numerals at the concentric openings o1' the casing and the minute indicating meansym in the form of a drum, said former means may be in the form of an endless belt, with the hour numerals thereon. The belt as it runs on its rollers presents the successive hour numerals at said openings. E@

Other objects and advantages willbecome apparent upon a further study of the description and drawings, in Which:-.

Fig. 1 is a front elevation of the preferred form of my clock. 20

Fig. 2 is a section taken generally along the line 2-2 of Fig. 1.

Fig. 3 is a section taken along the line -i-3 of Fig. 1.

Fig. 4 is an elevation of the annular disc with 25 the minute window, said disc being shown by itself.

Fig. 5 is a perspective view of the hour ring or drum shown by itself.

Fig. 6 is a front-elevation of the main casing 30 shown by itself.

Fig. 7 is a front elevation oi' an alternative form of the clock in which the minute numerals rotate.

Fig. 8 is a partial sectionof the clock taken 35 along the line 8-8 of Fig. 7.

Fig. 9 is a side elevation of a form of the clock in which only a portion of the clock casing has a spherical surface.

Fig. l0 is a front elevation of the clock shown .3@ in Fig. 9.

Fig. 11 is a front elevation of a form of the clock in which the casing is cylindrical.

Fig. 12 is a horizontal section of the clock of rig. 11 in which the drum is in the form of a 45' prism inscribed in the cylindrical casing, the driving mechanism being omitted.

Fig. 13 is a section of a clock having a casing in the form of a prism, the drum being in the form of a cylinder, the driving mechanism being 50 omitted.

Fig. 14 is a horizontal section of a clock with a cylindrical casing', as in Fig. 1l, in which the drum is also cylindrical, the driving mechanism being omitted. 55

Fig. 15 is a section through a two faced clock, the hour ring being shown partially in elevation,

said section being taken along the line I5-I5 of Fig. 16.

Fig. 16 isa front elevation of the two faced clock.

Fig. 17 is a front elevation oan endless band type of clock.

Fig. 18 is a section taken along the line I8-I8 of Fig. 1'1, and

Fig. 19 is a section taken along the line I9-I9 of Fig. 1'1.

Main casing 9, which is spherical, is supported on feet III. A large opening II (Fig. 6) is provided in the front of casing 9. The minute numerals 0 to 59 are marked on casing 9, bordering opening I I. In the drawings only some of the minute numerals are shown, it being readily understood that a complete setof numerals are to Ibe provided.

Guide lugs I2 are provided on the front of casing 9. Annular minute disc or plate I3, is rotatably mounted between lugs I2 and casing 9. As disc I3 is rotated, by means to -be described later, minute window I4 exposes `the successive minute numerals located on the front of casing I about large opening I I. Disc I3 has a large window I9 which is concentric with opening I I. The inside face of disc or plate I3 is provided with a ring of bevel gear teeth I5. Disc I3 is set out in the form of a ridge I6 at teeth I5, so that the distance from the center of the spherical casing 9 to the innermost point on saiii teeth is not less than the radius of the inside face of casing 9. This is so that teeth I5 will clear the outside face of hour ring or drum I1. Hour ring I1, which has a. spherical contour, is a substantially hollow spherical zone, preferably symmetrical about a great circle of the casing, and preferably that great circle which is the equator of the casing, the outer face of said zone having a radius substantially equal to that of the inside face of casing 9. Ring I1 is slidably mounted in casing 9 and is retained in position therein by guide lugs I8. The axis of rotation of hour ring or drum I1 is at right angles to the axis of rotation of minute disc I3. Hour ring I1 has large numerals 1 to 12 around its outside face, which, as said ring is rotated, show successively through large Window I9 of disc I3.

A synchronous electric clock motor 29 with the necessary reducing gearing, is used to drive hour ring I1 and disc I3. The motor shovm is diagrammatic. In its place a spring clock motor could be used. A motor shaft 2| has. atits outer end a worm 22, which vmeshes with a worm wheel 23 fixed to shaft 24. Shaft 24 has one end mounted in a bearing 25 on casing 9 and the other lend in fixed disc 26, Figs. 2 and 3. Disc 26 is mounted on casing 9 by a pedestal 21. On the end of shaft 24 away from worm wheel 23 is fixed a gear 28 which meshes with an idler gear 29. Idler gear 29 meshes with gear 30 fixed on short shaft 3|. Fixed to short shaft 3|, adjacent to idler gear 29, is bevel gear 32 which meshes with bevel gear teeth I5 on minute disc I3. For driving hour ring I1, a cam 33 is provided xed to shaft 24, said cam having a low spot 34 formed in its periphery. A lever 35 is pivotally mounted on fixed disc 26. The inner end of said lever carries a cam roller 36. The outer end of lever 35 has a pawl 31 pivotally mounted on it. Pawl 31 is normally spring pressed outward by spring 55. Hour ring I1 is provided on its inside with twelve ratchet teeth 38 which are successively engaged by pawl 31. The mechanism for driving hour ring I1 is similar to that shown in U. S. Patent No. 2,001,195, May 14, 1935.

The gear train comprising gears 28, 29, 30, 32 and ring o-f bevel gear teeth I5 is so proportioned that one revolution of shaft 24 occurs for each revolution of minute disc I3. Thus low spot 34 comes opposite roller 36 once each hour. When this occurs, spring 39, pulling on lever 35, snaps said roller into said low spot, causing paWl 31 to rotate hour ring yI1 one-twelfth of a revolution and to expose the next hour numeral at window I9.

The driving mechanism rotates minute disc I3 with its window I4 continuously, one revolution requiring an hours time. When minute disc I3 has about finished exposing numeral' 59, hour ring I1 is caused to jump a one-twelfth revolution. The rotation of window I4 exposes the successive minute numerals. The minutes can be determined or estimated at a great distance from the clock, even if the minute numerals cannot be read, by the position of window I4, just as by the minute-hand in an ordinary clock.

In the alternative form shown in Figs. '1 and 8, the annular minute disc 40, which is located inside main casing 42, is provided with the minute numerals 0 to 59, while minute window 4|, which is formed in main casing 42, is stationary. In the form shown the hour ring 43 rotates in the opposite direction to that shown for hour ring I1 in Fig. 1.

Similar driving mechanism is provided to that of my preferred form. A driven shaft 44, has a gear 45 xed to its end which meshes with idler gear 46 which in turn drives a gear, not shown, xed to short shaft 48. Bevel gear 49, fixed to shaft 48 engages bevel gear ring 5U on the rear of minute disc 40, causing the latter to rotate once every hour. The cam and pawl mechanism for driving hour ring 43, has the single notched cam 5I xed to shaft 44 which trips lever 52 and its pawl 53 into ratchet teeth 54 turning hour ring 43 one-twelfth of a revolution each hour.

As minute disc 40 rotates behind Window 4I, the successive minute numerals are exposed at window 4I. When minute numeral 59 leaves Window 4|, lever 52 is tripped and the next hour numeral on hour ring 43 is exposed through the large front opening in casing 42 and minute disc 40.

The clock'of Figs. 9 and 10 has the lower portion 56 of its casing formed with a spherical surface. Its hour drum 51 is in the form of a spherical zone rotatably mounted in portion 56. The upper and lower edges 58 and 59, respectively, of drum 51 are symmetrically disposed about a minor circle of lower portion 56 of the casing. In other words the diameter of upper edge 58 is greater than that of lower edge 59. This zone differs from that formed by drum I1 of Figs. 1,

y2 and 5 in that the latter has its upper and lower edges symmetrically disposed about a great circle of the spherical casing. The hour numerals are disposed on the drum to appear vertically at opening 66. A plate 6I, having a substantially spherical surface, is rotatably mounted on the front of portion 56 of the casing. It has a window 62 for indicating the minutes, and is in general similar to plate I3 of Figs. 1, 2, 3 and 4.

In Fig. 11 a clock is shown with a cylindrical?? casing 63, the hour drum 64 being in the form of a cylinder as in Fig. 14. The numerals on the hour drum are presented at opening 66. The minute disc 61 is a flat plate rotatably mounted .minute discs 8| and 88 are caused to revolve at in the forwardly extending portion 69 of casing 88. Disc 61 has a ring of' bevel gear teeth 13 upon it. An index notch 68, in disc 61, exposes the minute numerals on flange 12 of portion 69 of casing 83, only the 18 minute numeral being shown. i

Instead of the hour drum being cylindrical, it could be in the form of a prism, as drum 65 in Fig. 12. I

Fig. 13 is a section through a clock in which the casing is in the form of a prism. The hour drum 1| is shown as a cylinder inscribed in the casing. Said drum could be given a polygonal form as in Fig. 12.

The mechanism for driving the hour drums and minute discs for the clocks illustrated in Figs. 9 to 14 inclusive is not shown, but as will be understood by those skilled in the art it is similar to that provided for the clock of Figs. 1 to 6 inclusive.

Instead of using a minute window I4, in Figs. 1 and 4, which Window in reality is an index for indicating the successive minute numerals, other forms of index means could be used, such as a window in the form of notch 68 in disc 61,

, Fig. 11.

Other modifications of my clock can be made and still come within the scope of my invention.

In Figs. 15 and 16 there is illustrated a two .V

faced clock of the general type of Fig. 1. Mounted to-rotate inside of spherical casing 15, is a spherical zone or hour ring 16, having an upper set of hour numerals 11 and a lower set 18. Casing 15 has a front window or opening 19 and a rear opening 80. Rotatably mounted just inside of casing 15 is annular minute disc or plate 8|, having its opening 85 smaller than and concentric with opening 19. In Fig. 16, the hour numeral 12 of the lower set of hour numerals 18 is shown encircled by opening 85. Plate 8| is provided with a minute window 82 which as said plate rotates exposes the successive minute numerals located on annular plate 83 iixed by stays 84 to the inside of casing 15. The opening in plate 83 is substantially coincident with opening 85. For the position of minute window 82 shown in Fig. 16, the minute numeral 30 is exposed. Minute numerals 0, 15, and 45 are shown dotted but it will be understood that the rest oi the minute numerals are located in a ring con-- taining them. In a similar manner, annular minute disc or plate 86 is rotatably mounted just inside of casing 15, having its opening 81 smaller than and concentric with opening 80 in the rear of said casing. The hour numerals of the upper set 11 successively appear at the rear of the clock encircled by opening 81. A minute window, not shown, similar to minute window 82, is provided for minute disc 86 which as said disc rotates exposes the successive minute numerals, not seen, located on annular plate 88 fixed by stays 89 to the inside of casing 15. The opening in plate 88 is substantially coincident with opening 81.

Motor 90 drives shaft 9| which has a cam, not

seen, similar to cam 33, Figs. 2 and 3, fixed to it which operates similar mechanism to that shown in said figures for engaging rock teeth 92 inside of hour ring 16 for rotating said ring one-twelfth of a revolution every hour. Bevel gear 93, fixed to the upper end of shaft 9| meshes with bevel gear 94 fixed to short shaft 95. Bevel gear 96 is also fixed to short shaft 95 and drives on one side bevel gearing 91 fixed to minute disc 8| and on the other side bevel gear ring 98 iixed to minute disc 86. By the train of gears 'just described,

the rate of one revolution per hour for exposing through their minute windows on opposite faces of the clock the ring of minute numerals on plates 83 and 88. The rotation o! hour ring16 presents the successive hour numerals, on opposite faces of the clock, inside the rings of minute numerals. I

Instead of using an hour ring, the clock illustrated in Figs. 17, 18 and 19 uses an endless iiexible band or belt 99 with the hour numerals thereon, the hour numeral 3 in Fig. 17 being one of said numerals. Casing |00 has an opening |0| in front. Rotatably mounted on casing |00, is an annular minute plate |02 having its opening |03 concentric with opening |0|. Back of plate |02 is another annular plate. |04, the minute numeral plate, fixed to casing |00by stays |05. The opening in minute numeral plate |04 is concentric wih opening |03 in minute plate |02. Minute numeral plate |04. has the minute numerals arranged in a ring about its opening, the minute numeral 45 `in Fig. 17 being one of said numerals. Minute plate |02 is provided with a minute window |06, which as said plate rotates exposes the successive minute numerals located on minute numeral plate |04. For the position of minute window |06 shown in Fig. 17, minute numeral 4 5 is exposed. Endless' band 99 is mounted on idler rollers |01 supported on extensions |09 of cross piece |08 iixed to the casing, said band being held taut and driven by pin wheel ||0, the pins of which engaging corresponding perforations in said band. A guide |22 keeps the forward run of band 99 close to opening |03.

Motor ||2, by means of shaft ||3 and worm ||4 fixed to it, drives wormwheel H5 fixed to shaft ||6. Bevel gear ||1 engages 4the ring ||8 of bevel gear teeth fixed to the rear of minute plate |02 for rotating the latter at the rate of one revolution per hour. A pawl I9 as explained Afor the clock of Fig. 3 is tripped once an hour by the revolution of cam fixed to shaft ||6, said pawl engaging ratchet teeth |2| on the inside of pin Wheel ||0. Each time pawl ||9 istripped a new hour numeral is presented at window |03.

I claim:-

1. A clock comprising a casing, a drum rotatablyvmounted in said casing with the periphery of said drum adapted to rotate by the front of the casing, said drum presenting on its periphery numerals representing hours, said casing having an opening in its front opposite the drum, the rotation of the drum presenting at said opening its successive hour numerals, a fixed ring of minute numerals around said opening, and a rotatlably mounted member at the front of the casing having an opening therein opposite the opening in the casing, enabling the Successive hour numerals to be exposed through both openings, said member having an index for showing the successive minute numerals as it passes around said ring.

2. A clock comprising a casing member, a drum rotatably mounted in said casing member with the periphery of the drum adapted to rotate by the front of the casing member, said drum presenting on its periphery numerals representing hours, said casing member having an opening in its front opposite the drum, the rotation of the drum presenting at said opening its successive hour numerals, and a rotatably mounted plate member' at the front of the casing member havingy an opening therein'opposite theopening in the casing member, enabling the successive hour numerals to be exposed through both openings, one of sald'members as viewed from the front having a ring of minute numerals surrounding its opening, the other of said members having an index for successively indicating the minute numerals as said plate member is rotated.

3. A clock comprising a casing, a drum rotatably mounted in the casing with the periphery of the drum adapted to rotate by the front ot the casing, said drum presenting on its periphery numerals representing hours, said casing having an opening in its front opposite the drum. the rotation of the drum presenting at said opening its successive hour numerals, said casing having a ring of minute numerals `around said opening,

and a rotatably mounted member for successively indie-ating the minute numerals, said member leaving a substantially unobstructed view of the hour numeral through the opening in the casing.

4. A clock comprising a casing, a drum rotatably mounted in the casing with the periphery of the drum adapted to rotate by the front of the casing, said drum presenting on its periphery numerals representing hours, said casing having an opening in its front opposite the drum, the rotation of the drum presenting at said opening its successive hour numerals, a member rotatably mounted at the front of the casing, said member having a ring of minute numerals surrounding said opening, and indexing means carried by the casing for indicating the successive minut/e numerals as they rotate about said opening.

5. A clock comprising a casing having a spherical surface, a drum substantially in the form of a spherical zone rotatably mounted in the casing with the periphery of the drum substantially concentric with said spherical surface and adapted to rotate by the front of the casing, said drum presenting. on its periphery numerals representing hours, said casing having an opening in its front opposite the drum, the rotation of the drum presenting at said opening its successive hour numerals, said casing having a ring of minute numerals around said opening, and a plate having a spherical surface rotatably mounted at the front of the casing substantially concentric with the spherical surface of the latter and having an opening therein opposite the opening in the casing, enabling the successive hour numerals to be exposed through both openings, said plate being provided with a window and covering up the ring of minute numerals except at the window for successively showing the minute numerals as said plate is rotated.

6. A clock comprising a casing having a spherical surface, a drum substantially in the form of a spherical zone rotatably mounted in the casing with the periphery of the drum substantially concentric With said spherical surface and adapted to rotate by the front of the casing, said drum presenting on its periphery numerals representing hours, said casing having an opening in its front opposite the drum, the rotation of the drum presenting at said opening its successive hour numerals, and a plate having a spherical surface rotatably mounted at the front of the casing substantially concentric with the spherical surface of the latter and having an opening therein opposite the vopening in the casing, enabling the successive hour numerals to be exposed through both openings, said plate having a ring of minute numerals surrounding its opening, and indexing means on the casing for indicating the successive minute numerals4 as they rotate about said opening.

7. A clock as claimed in claim 2 in which the periphery of the drum is substantially inscribed in the casing, the cross-sections of the drum and the casing being substantially regular geometric figures.

8. A clock comprising a casing member having a spherical surface, a drum substantially in the form of a spherical zone rotatably mounted in the casing, the outside radius of the drum being substantially equal to the inside radius of the casing member opposite the sphericalsurface, said drum presenting numerals representing hours, said casing member having an opening in its front opposite the drum, the rotation of the drum presenting at said opening its successive hour numerals, and a rotatably mounted member at the front of the casing member having an opening therein opposite the opening in the casing member, enabling the successive hour numerals to be exposed through both openings, one of said members having a ring of minute numerals about its opening, the other of said members having an index successively indicating the minute numerals its successive hour numerals, and a rotatably mounted member at the front of the casing member having its axis of rotation substantially at right angles to said axis of rotation of the drum leaving a substantially unobstructed view of the hour numeral at the opening, one of said members having a ring oi minute numerals about said opening, the other of said members having an index for successively indicating the minute numerals as said rotatably mounted member is rotated.

10. A clock comprising a casing, a drum rotatably mounted in the casing with the periphery of the drum adapted to rotate by the front of' the casing, the axis of rotation of the drum extending in a general up and down direction, said drum presenting numerals representing hours, said casing having an opening in its front opposite the drum, the rotation of the drum presenting at said opening its successive hour numerals,

and a rotatablymounted plate at the front of the casing having an opening therein in register with the opening yin the casing, enabling the successive hour numerals to be exposed through bothl openings, the axis of rotation of said 4plate being substantially perpendicular to and intersecting the axis of rotation of the drum, said casing having a ring of minute numerals about its opening, said plate being provided with an index for successively indicating the minute numerals as the plate is rotated.

11. A clock comprising a casing member, a drum rotatably mounted in said casing member with the periphery of the drum adapted to rotate by the front of the casing member, said drum presenting on its periphery numerals representing hours, said casing member having an opening in its front opposite the drum, the rotation of the drum presenting at said opening its successive hour numerals, mechanism for intermittently rofill tating the drum step by step, the drum after each step of rotation presenting its next hour numeral at the opening, a rotatably mounted member at the front of the casing member leaving a substantially unobstructed view of the hour numeral at the opening, the axis of rotation of the drum and the axis ofcotation of the rotatably mounted member making a substantial angle with each other, mechanism for rotating said latter member, one of said members having a ring of minute numerals about said opening as viewed from the iront, the other of said members having an index for successively indicating the minute numerals as said rotatably mounted member is rotated.

12. A clock comprising a casing, a drum rotatably mounted in said casing with the periphery of the drum adapted to rotate by the front of the casing, said .drum-presenting on its periphery numerals representing hours, said casing having an opening in its front opposite the drum, the rotation of the drum presenting at said opening its successive hour numerals, mechanism for intermittently rotating the drum step by step, the drum after each step of rotation presenting its next hour numeral at the opening, a rotatably mounted member at the front of the casing having an opening therein opposite the opening in the casing, enabling the successive hour numerals to be exposed through both openings, mechanism for rotating the member, and a ring of minute numerals held by the casing and surrounding the openings as viewed from in front, said member being provided with an index successively indicating the minute numerals as it rotates 13. A clock comprising a casing having a spherical surface, a drum substantially in the form of a spherical zone substantially concentric with the casing opposite its spherical surface, said drum presenting on its periphery numerals representing hours, said casing having an opening in its front opposite the drum, the rotation of the drum presenting at said opening its successive hour numerals, mechanism for intermittently rotating the drum step by step, the drum after each step ol rotation presenting its next hour numeral at the opening, a rotatably mounted member at the front of the casing having an opening therein opposite the opening in the casing, enabling the successive hour numerals to be exposed through both openings, mechanism fory rotating the member, and a ring of minute numerals held by the casing and surrounding the openings as viewed u from in front, said member being provided with merals as it rotates.

14. A clock comprising a casing member, a device movably mounted in said casing member having an outer surface adapted to move by the front of the casing member, said device presenting numerals representing hours, said casing member having an opening in its front for exposing a portion of said surface, the motion of said device presenting at 'said opening its successive hour numerals, and a rotatably mounted member at the front of the casing member having its axis of rotation substantially at right angles to the direction of motion of said surface at said opening and leaving a substantially unobstructed view of the hour numeral at the opening, one of said members having a ring of minute numerals about said opening, the other of said members having an index for successively indicating the minute numerals as said rotatably mounted member is rotated.

15. A clock comprising a casing member, a device movably mounted in said casing member having an outer surface adapted to move by the front of the casing member, said device presenting numerals representing hours, said casing member having an opening in its front for exposing a portion of said surface, the motion of said device Apresenting at said opening its successive hour numerals, and a rotatably mounted member at the front of the casing member having an opening therein opposite the opening in the casing member, enabling the successive hour numerals to be exposed through both openings, one

of said members having a ring of minute numerals about its opening, the other of said mem.- bers having an index successively indicating the minute numerals as said member is rotated.

16. A clock comprising a casing, a device movably mounted in said casing having an outer surface adapted to move by the front of the casing, said device presenting numerals representing hours, said casing having an opening in its front for exposing a portion of said surface, the motion of said device presenting at said opening its successive hour numerals, and a rotatably mounted member at the front of the casing having an opening therein in register with the opening in the casing, enabling the successive hour numerals to be exposed. through both openings, said casing having a ring of minute numerals about its opening, said member being provided with an index for successively indicating the minute numerals as said member is rotated.

NATHAN GEORGE HORWITT.

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