Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS1344913 A
Publication typeGrant
Publication dateJun 29, 1920
Filing dateNov 7, 1918
Priority dateNov 7, 1918
Publication numberUS 1344913 A, US 1344913A, US-A-1344913, US1344913 A, US1344913A
InventorsLong John T
Original AssigneeLong John T
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Clock
US 1344913 A
Abstract  available in
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

l. T. LONG.

CLOCK.

APPLICATION FILED Nov.7.1918.

Patented June 29, 1920.

lil

K wlwumnuln... un...

INVENTOR. J o 71,71. T. L 0

7719 'Y/U'Wd/M/ A TTORNEYS.

UNITED STATES PATENT OFFICE.

JOI-IN T. LONG, 0F; SAN DIGO, CALIFORNIA.

, CLOCK.

T0 kall whom it may concern:

Be it know-n that I, JOHN T. LONG, a citizen .of the United States, residing at San Diego, in the county of San Diego and State of California, have invented certain new and useful Improvements in Clocks, of which the following is a specification.A

My invention relates to ay clock and the objects of `my invention `are first, to provide a clock which will indicate the time of day at all locations upon the earths surface simultaneously, second to provide a clock of this class which .is provided with two faces oppositely disposed, the rone provided with a inap of the Northern Hemisphere and the other with a map of the rSouthern Hemisphere and a clock works intermediate said faces with an .axis extending to the faces on opposite sides land with a handen each side over Ieach face adapted to revolve with these hcmispheres once in each twenty-four hours, the one :moving in clockwise .direction and the other in the opposite direction, third, to provide a clock of this class in whit-h the ordinary clock works may be used but that portionoperating the minute hand may be eliminated. if desired, fourth, .to provide a clock of this class which is simple and economical of construction,durable, and which will not readily deteriorate `or get out of order, and fifth, to provide a clock of this class which may .be used by teachers with students relative to longitude and time.

With these and other objects in view as will appear hereinafter, my invention consists of certain novel features of construction, combination andy arrangement of parts and portions as will be hereinafter described in detail and particularly set forth inthe appended claims, reference being had to the accompanying drawings and to the characters of reference thereon which form a part of this application in which:

Figure 1 is a side elevational view of the clock, Fig. 2 is a side elevational view of the opposite side of said clock, Fig. 3 is a transverse sectional view through the middle thereof, showing some of the parts in elevation to facilitatel the illustration, and Fig. 4 is a sectional view` through the middle thereof at a right angle thereto and showing some of the parts in elevation to facilitate the illustration.

Similar characters of reference refer to similar parts and portions throughout the several views of the drawings.

Specification of Letters Patent. Patentd June 2,9,`1920 Application mea November 7. 191s.

Serial No. 261.540.

The conventional clock works 1, worm pinion 2, worm gear 3, shaft 4, shaft 5, setting key 6, regulating shaft 7, winding shafty 8, vdisks 9 and 10, hands 11 and 12, casing 13, support 14, and base 15 constitute the principal parts of my clock.

The clock casing 1 incloses an ordinary or .conventional clock works; however, that portion of the clock works pertaining to the operation of the minute hand may be eliminated if desired. The regulating shaft is provided with an extension 7 which extends outwardly through the outer side of the casing 13 so that the same may be regulated from the outside, also, the winding shaft is extended by a shaft S which extends outside r`so that it .is readily accessible for winding. The shaft to which the hour hand is secured in the ordinary clock is extended and on it is secured ,a worm pinion 2 which meshes with a worm'gear 3 of larger relative size.. This is for the purpose of reducing the speed of thehour hand, the hands on this clock only making a revolution iny 24 hours instead of a revolution in 12 hours in the ordinary clock structure. Secured on the shaft 4 at each end are flange members 9 and 10a to which are secured Ethe disks 9 and 10 vand pivotally mounted on the disks 9 and 10 are the hands 11 and 12 which eX- tend outwardly as shown in Figs. 1,2, and 8 of the drawings. They are provided with a large contact surface to provide friction against the outer surface of the disk so that they turn with the `disk ordinarily but permit the hand tofbe Iturned by holding the disk and the hand may be turned to any position over the face of the disk. The disk 9 is provided von its outerY surface with a map of the Northern Hemisphere with the parallel and meridian lines thereon. The disk 10 is also provided on its outer surface with a map of the Southern Hemisphere with the parallel and meridian lines thereon and particularly showing cities and particular locations on the maps. The sides 13l and 13b arey each provided with dials with numerals ruiming from 1 to 12 in half its circumference and from 1 to 12 in the other half. The numbers running in antifclockwise direction in the Northern Hemispheres side, as shown best in Fig. 1 of the drawings and the side 13b is similarly marked except that the numbers run in clockwise direction. This is in connection with the Southern Hemisphere and between the numbers is a graduated scale for determining fractions of hours. Each of these sides is provided at the top with the word Noon, at the bottom with the word Midnight, at one side Evening, and on the other side, Morning. rlhe frame 13 is pivotally mounted on the base 15 by means of a bolt lr1 extending up through the lower side thus permitting the casing 13 to be revolved on the base 15.

The operation of the clock is as follows:

It is wound in the ordinary manner and the disks carrying the maps revolve with the shaft, one revolution in 241 hours. The hand is moved by holding the disk to a position so that it covers the location where the clock is to be used, for instance, if the clock is located in the Northern Hemisphere the hand on the disk is moved to the proper position, if it is located in the Southern Hemisphere the hand on the disk carrying the map of the Southern Hemisphere is moved to the position of the location. If it is desired to tell the time of day at any place on the face of the globe it is done by loeating the meridian lines close to the place at which it is desired to determine the time and following this meridian line outwardly the end of it is adjacent to the numeral indicating the time on the face of the clock so that the time at the location may be readily determined, the clock being turned on the base 15 if it is desired to determine the time on a different hemisphere.

Though I have shown and described a particular construction, combination, and arrangement of parts and portions I do not wish to be limited to this particular construction, combination, and arrangement but desire to include in the purview of my invention the construction, combination, and arrangement substantially as set forth in the n appended claims.

It is obvious that with this construction there is provided a clock in which the time of day at any place on the face of the globe may be readily determined as well as a service lock for determining the time of day in the place where the clock is lo rated; that the structure is simple and eco nomical of construction, easy to operate and understand.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent isl. In a clock of the class described the combination with an ordinary clock works, of a shaft at right angles to the hour hand shaft, means operatively connecting said shaft with the hour hand shaft whereby the speed is reduced one-half, a disk secured on each end of said. shaft, a map of the Northern Hemisphere secured on the outer surface of one disk, a map of the Southern Hemisphere secured on the outer surface of the other disk, a hand secured to each of said disks by frictional contact and extending radially from the center, a casing supporting said clock works provided with a dial with the numerals 1v to 12 on each half circumference of said dial, the numerals on the side on which the Southern Hemisphere is located running in clockwise direction and those on the opposite side running in anticlockwise direction.

2. In a clock of the class described the combination with an ordinary clock works, of an additional shaft at right angles to the hour hand shaft, gear means operatively connecting said. shaft with the hour hand shaft whereby the speed is reduced, a disk secured on each end of said shaft, a map of the Northern Hemisphere secured on the outer surface of one disk, a map of the Southern Hemisphere secured on the outer surface of the other disk, a hand secured to each of said disks by frictional contact and extending radially from the center and a casing supporting said clock works provided with a dial with the numerals 1 to 12 on each half of the circumference of said dial, the numerals on one side running in opposite direction to the numerals on the other side.

In testimony whereof I have hereunto set my hand at San Diego, California, this 29th day of October, 1918.

JOHN T. LON Gr.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4579460 *May 17, 1984Apr 1, 1986Shannon Thomas DSynchronous world clock
US5197043 *Mar 29, 1991Mar 23, 1993Strader Verne ANight and day earth clock calendar
US6788622 *May 17, 2002Sep 7, 2004Eddie M. GarciaGlobal time indicator
US7050357 *Jul 26, 2004May 23, 2006Garcia Eddie MGlobal time indicator
US7733743Oct 23, 2007Jun 8, 2010Boaz Baeksung ChoiComprehensive time determining system
Classifications
U.S. Classification368/27, 968/167
International ClassificationG04B19/22, G04B19/00
Cooperative ClassificationG04B19/22
European ClassificationG04B19/22