US1371935A - Time-controlled electric switch - Google Patents

Description

J. RUBIN. TIME CDNTROLLED ELECTRLC. SWITCH.

APPLICATION FILED FEB. 6, I919- Patented Mar. 15, 1921.

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UNITED STATES PATENT OFFICE.

JACOB RUBIN, OF CHARLESTON, WEST VIRGINIA.

TIME-CONTROLLED ELECTRIC SWITCH- Specification of Letters Patent.

Patented Mar. 15, 1921.

Application filed February 6, 1919. Serial No. 275,420.

conjunction with an electric circuit closing and opening device a time controlled mechanism having means for closing and keeping closed for a specified interval of time the electric circuit closing and opening device. To carry this object into effect, the apparatus is so constructed that it may be used with a conventional form of clock movement, the hour hand moving parts of which are operatively connected with a rotatably m0unted disk which carries an adjustable tripping finger operatively engageable with the circuit closing and opening device. The adjustment of the trip means makes for the peration of the circuit closing device at any desired time and through any desired interval of time. 7

A further object of the invention is to provide an apparatus or mechanism of the above mentioned character, which is simple in construction, durable and effective in operation and inexpensive to manufacture.

Other and further objects appear in the following description, wherein the invention is set forth in detail.

A specific embodiment of the invention as illustrated and described is adhered to, but to this embodiment it is not to be restricted. The right is reserved to make such changes or alterations as the actual reduction to practice may suggest, in so far as such changes or alterations are compatible in spirit with the annexed claims.

In the accompanying drawings: 7

Figure 1 is a front elevational view of the invention.

Fig. 2 is a central'vertical sectional View through the structure of Fig. 1.

Fig. 3 is a top plan view of the structure of Fig. 1.

Fig. 4 is a perspective view of one of the tripping arms used in conjunction with the device.

As shown, the invention is designed to be operatively connected to a conventional form of clock movement, the minute and hour spindles 1 and 2 of which are shown and operatively connected by the gear train generally designated 3 as is customary with such movements. The remainder of the clock mechanism being not essential to an understanding of the invention, is not shown here n but this mechanism is designed to be carried 111 an appropriate casing, only the front wall '4 of which is shown. Both the minute and hour spindles 1 and 2 project through this front wall, the minute spindle belng ournaled in the hour spindle, as is usual, and the latter being journaled in the,

wall 4, having attached to it exterior to the wall the gear 6. This gear 6 meshes with an ldle pinion 7 rotatably mounted on a stud 8 set in'the front wall 4. The pinion 8 in turn meshes with a gear 9, which is twlce the diameter of the gear 6 so that the angular velocity of the former will be onehalf that of the latter in order that the gear 9 may make one revolution in twenty-four hours, the gear 6 being connected to the hour spindle, obviously making two revolutions in twenty-four hours.

The gear 9 is formed on the front face with a relatively narrow annular portion 10 and on the front face of this annular portion there are formed the radially disposed slots 11 uniformly spaced around the annular portion 10, and being 24 in number, so that there will be one slot for each of the twentyfour hours.

The gear 9 on the front face between its peripheral edge and the outer or peripheral edge of the annular portion 10 carries the lndicating marks 12 for the purpose of indicating the 12 hours anti and post meridian.

The gear 9 is rotatably mounted on a stud l3 fixed in the front wall 4 and this stud 13 carries a pointer 14. Thus when the gear 9 revolves it moves relative to the pointer and the indications 12 pass the pointer obviously in a clockwise direction.

Carried by the front wall 4 and to one side of the gears 6 and 9 although positioned in close proximity to both there is a circuit closing and opening device and this device comprises a base block 15 made of insulating material and carried on brackets 16 which are secured to the front wall 4. This base block carries the two hinged posts 17 (the circuit closing device being a double pull switch) to which the switch blades 18 are pivotally attached at one end. The remaining ends of these switch blades are interconnected by an insulated cross bar 19 v annular portion 10 of the botton slots 11.

extent.

and the base'l5 carries a pair of flat springs secured to the base and bearlng against the under edges of the blades tending to keep vthem out'of contact with the clips 21 'which are carried by the block 15; The

10, in which it is secured by a screw 23,

which passes through either one of the holes 24 formed in the shank and threads into either one of the holes .25 formed in the The object of the peculiar arrangement or" holes shown is to provide for the adjusting of the tripto increase or diminish its radial Obviously if the screw 23 is inserted through the uppermost hole in the shank 22' and threaded into the outer hole 25 the trip member has its greatestradial' extent if the screw passes through the upper. hole 24in the shank and through the inner hole25 in a slot 11, the radial extent of the trip is reduced. f the screw passes through the lower hole 24 of the shank22 and threads into the inner hole 25 of the sl0t11,'the radial extent of the trip is still further reduced. Aside from the shank 22 the trip is formed with anarcuate arm 26 at the lower end of the shank andextending laterallyin one direction therefrom and is formed -with an inclined nose portion 27 7 carried at the bottom of the shank and ex V so that the switch forming part of the latter "tending laterally in the other direction.

The nose p0rtion27 or the trip 'member initially engages the circuit closing device may be depressed for engagement-with the clips 21. To reduce the resistance of this operation to a minimum,-the cross bar'19 ofthe switch carries two upstanding supports 28 between which there is rotatably rmounted an"anti-frictionaoller' 29 with which the nose 271engages and wlth whichf the arcuate portion 29 maintainscontact to 7 7 keep the switch depressed. .Obviously the switch will remain depressed as long as the arcuate portion 26 maintains contact with the roller 29' and; the arcuate portion26 may, therefore, be made of any length desired, but in the present instance itfis the intention'to make this arcuate portion of such a length that when the trip member is set in the distance of greatest radial extent the angular measurement of the arcuate portion will be equal to the angular measurement between any two adjacent slots 11. Thus when the trip member is set to close the switch it will keep the same in closed position for one hour, since the an ular .ve-

locity' oi the gear and perforce t e anguj lar velocity of the annular portion 101s ones twenty-fourth of a revolution per hour.

In the event that it .is desired to keep the switch closed for a longer period than one.

hour, a second trip memberor aithird one" if desiredmay be operatively positioned in succeeding slots,v as indicated by dotted lines in Fig. 1, sot-hat the combined length of the arcuate portions may make for the keeping of the switch closed foras many hours as there are arranged trips in a gang.

Again, trips may be positioned at different points around the annular portion 10 to V arrange for closing the switch at certain times and when it isdesired to position the trips so that they may not effect the operation of the switch, their radial extentmay.

be reduced in the manner above described 7 The spring 20 serves always to keep the.

switch open except when it is engaged bythe trips. V r V I The invention having been described, what is claimed as new and useful is v A mechanism of the kind .describedcomprising a rotatably mounted wheel having means for operatively connecting it to a' driving mechanism, a circuit open ng and, H

closing device, the said wheel being provided with an annular portion in one face of which there is formed'a plurality or" radially disposed slots trip members each embodying a shank engageable inany one of the said slots and having an arcuate arm ex-' tending laterally in one direction and an inclinedv nose portion extending laterally in the other direction but at an acute angle to. the shank, and mean'sdetachably securing the shanks in the said slots, whereby thetrip membersmay be arranged in gauge indis crimlnately for-engagement withthe circuit opening and closing device;

In testimony whereof Iaflix my signature JACOB Rosin.

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