US1807497A

US1807497A - Clock

Info

Publication number: US1807497A
Application number: US400631A
Authority: US
Inventors: Speciale Michael
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-10-18
Filing date: 1929-10-18
Publication date: 1931-05-26
Anticipated expiration: 1948-05-26

Description

- Patented May 26,1931

- UNITED STATES {PATENT OFFICE manna. snow, or NEW YORK, N. Y.

CLOCK Application filed ombu- 1a, 1929. man No. 400,631.

This invention relates to clocks. It is among the prime objects of the present invention to rovide a clock having a plurality of hour ands adapted to indicate 6 various time differences.

It is afurther object of the present invention to provide a clock having a. twent -fourhourdial. The hour points are divlded to indicate minutes, whereby an hour hand will 10 denote the hours and the minutes, thus rendering it unnecessary to have a separate minute hand.

A further object of the present invention is to provide a clock with a plurality of hour hands frictionally engaging the same arbor,

whereby they may be a justed and move simultaneously witheach other to indicatetime diflerences.

Other objects of the present invention include the novel and improved structure for the engagement of the hands u n the arbor. Numerous other objects and eatures of the present invention will be apparent froma consideration'of the following specification taken in conjunction with the accompanying drawings, in which igurel 1s a planview of one embodiment of the present invention;

Fig. 2 is a detail sectional view taken on the lines 2.2 of Fig. 1;

- Fi 3 is a detail side elevation of one of the han and Fig; 4 is a rear elevation of one of thehands. y r Referring more particularly to Fig. 1 ofthe drawings, the present clock includes, a; face divided into twent -four hour spaces, the hours being indicat by the large numerals 10 on the face. Between each of the hour numerals, the face is divided in a suitable .manner to indicate minute fractions of an hour. For instance, in illustrating, the

, marks denote every five-minute interval between the hour intervals, as indicated by the numeral 11. It will be understood that any desired arrangement of markings and the numerals therefor, may be provided. The face further includes a central band 12, one side of which is white and indicates that that side of the face is for A. M. time,

arbor is used in the present invention, the

while the opposite side is black and indicates P. M. time. The face further includes suitable indicia for designating the times. It is, however, understood that the invention is not confined to the specific marking of the twenty four hour dial herein indicated, but that such markings may be varied without departing from the spirit of the invention. It; will further be understood that .the clock and clock mechanism may be of any desired t pe, such as mechanical or electrical, and t e invention is not confined to any preferred type of such movement, it being obvious that the use of a pendulum or spring in mechanical train or specific types of electrical clock as mechanism, does not depart from the spirit or scope of the invention.

. By the provision of the minutedivisions between the indicated hours on the face of the clock, it will readily be seen that the conventional minute hand is not required. Thus the white outside time hand of Fig. 1 of the drawings, indicates thirty minutes past eleven oclock A. M. time without requiring the use of an independent minute hand. Thus a single arbor, indicated by the numeral 14, is provided, which extends centrally through the face and which is turned by suitable mechanism as an hour hand arbor. I

Referring more particularly to Fig. 2 of the drawings, it will be seen that the arbor 14 may be associated through the hour gears 15, with any desired type of clock train. The arbor 14 extends through the face of the clock and includes an inner shoulder 16, recessed as at 17 together with an outer shoul- 'der 18, recessed as at 19.

22 which bears indicia so indicating. The

inner hand 21 includes a sleeve 23, which fits ,over the larger shoulder 16 and further includes a pair of spring fingers 24, the fingers 24 having forwardly extending ends 25 which pass on each side of the hand to be operable from the front, as will be hereinafter described. Intermediate the ends of the fingers 24, they are received in a recess 17 thus locking the hand in position on the arbor, whereby it frictionally engages the arbor and rotates therewith. I

The outer hand 20. includes a sleeve 26,

which surrounds the shoulder 18 and is pro vided with fingers 27, which are received in the recess 19 to lock the fingers in frictional engagement with the arbor 142., The ends of the fingers 27 extend forwardly, as at 28, to provide operating terminals therefor. The

sleeves

23 and 26 have side apertures 29,

\ through which the

fingers

24 and 27 pass for ance the weight of the hand and provide a balance for the energy required by the arbor to turn the hand, it being understood that the counterbalance is not sufiicient to move the hand with respect to the arbor 'or to retain the hand against movement with respect to the arbor. I

In the operation of the device, the outer local time hand 20 is set at local time, and the outside time hand is adjustedto a position adapted to show outside time at the desired place. A suitable chart preferably accompanies the clock to indicate time diiferences between various places. Thus the device may be used, for instance in con]unct1on with dayl light saving time, in which the hand 20 is set for standard time, while the outside time hand is set one hour in advance'to indicate daylight saving time. After setting the hands, it will be seen that their frictional engagement with the arbor provides for the ro-' tation of both hands in unison in response to the clock train. It'will readily be seen that the hands may be arranged to indicate international time by setting the outside time hand in advance or behind the local time hand in accordance with the chart provided, whereby time in various countries may be indicated by the outside time hand as it moves simultaneously with the'local time hand.

marking the same local time. This clock is particularly useful on trains in connection with railroad stations, on ships, and steamship oflices, naval observatories, telegraph ofiices, airplanes and airports, broadcast stations or the like, where it is necessary to know the local time as well as outside time.

From the foregoing it will be seen that the present invention provides a device adapted to simultaneously indicate time in various places. It will therefore be seen that the invention provides a novel twenty four-hour clock which does not require a minute hand.

Thus a clock mechanism may be considerably simplified. it will be understood that the invention is not specifically confined to the details changes, modifications, and the full use of equivalents may be resorted to without departing from the spirit or. scope of the invention as outlined in the appended claim.

What is claimed is:

In combination, an arbor having a circular herein shown .but, that numerous groove therein, a hand having a slotted sleeve, said sleeve fitting-on said arbor with its slotted portion in registry with said -groove,.and a spring engageable in said groove through the slotted portion of the sleeve to frictionally retainthe hand in position on the arbor.

MICHAEL SPECIALE.-

n Will be seen that theclock'maybeused'r for family orofiqce asia commonclock'forty local time only, by -xusingone hand orhoth-