US1508064A - Time control switch - Google Patents

Description

Sept. 9 1924. 11,508,064

L. W. RADMAN rma CONTROL SWITCH Filed Feb. 21, 1923 Q 2 Sheets-Sheet l &

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Patented Sept. 9, 1924'.

thereof residing umrso STATES] PA ENT OFFICE.

LESTER W. DEAN, OI BUCKHANNO N, WEST VIRGINIA.

TIME CONTROL SWITCH.

Application filed February 21, 1928. Serial No. 620,828.

To allwkom it may concern:

Be it-known that I, Lnsrnn W. RADMAN, a' citizen of the United States, residing at Buckhannon, in the county of Upshur and State of West Virginia, have invented certain new and useful Improvements in Time Control Switches, of which the following is a specification. My invention relates to improvements in time controlled switches, the primary object in the provision of such a switch that may be readily associated with practically all types of alarm clocks, with which I am now familiar, the invention being further characterized by its simplicity of construction and ease of application to and removal from the said alarm clocks, the

device constituting relatively few parts, and these correlated in such manner as to reduce the liability of derangement to a minimum. A further object of my invention is the provision of such a time controlled switch that is primarily, but not specifically, adapted to be employed in conjunction with the lighting systems for the show windows of department stores and the like, the switch belng well adapted to cut out these lights at a predetermined time.

With the above and other objects in view, the-nature and advantages of m device will be readily understood by a care il review of the specification when considered in conjunction with the drawings.

In the drawings forming part of this application, like numerals of reference indicate similar parts in the several views, and where1n:

Figure 1 is a cross sectional view of my switch casing, the same being shown as applied to a" conventional type of alarm clock, the switch mechanism being shown in side elevation.

, Itigure 2 is a rear elevational view of this casing disposed upon the clock. I V

Figure 3 is a cross sectional view of my improved switch.

' F1 e 4 is a rear elevational view of the switc per so. I Figure 5 is a cross sectional view taken sulstantially upon the line 5-5 of Figure 3, an Y Figure 6' is a perspective of one'of the elements constituting my improved switch.

Referring to thedrawin in detail, A deslgnates an alarm clock of t e usual construction, and B the casing for my switch mechanism,

as shown and having in the front wall/thereof, an opening 6 for the reception of the usual reduced portion a of said alarm clock, this opening I) being formed at its inner side with a flange ,c. r

The reference character 5 indicates the alarm spring winding shaft of the clock, one end of this shaft being reduced and screw which is preferably of square shape threaded as at 16 for the reception of the usual finger winding member 7. In applying my switch to the type of alarm clock shown, the said finger winding member 7 is removed from the winding shaft of the clock, at'which time, my switch casing B may be positioned thereon in a' manner more clearly indicated in Figure 1'.

Within this casing is a square shaft 8, I

the front end of which is formed with a screw threaded socket for receiving the said reduced and screw threaded end 6 of the clock spring shaft 5. Adjacent the front end of this shaft 8 is a porcelain insulating member 9, preferably round in shape, and

having an opening 10 therethrough, which opening is centrally of the insulatin block 9 and is also round-shaped to permit t c said shaft 8 to rotate therein. The front face of this block 9 has close contact with the adj acent wall of the clock A, the opposite face of the blockcarrying a pair of diametrically disposed stationary contact arms 11, to which are' secured the wires 12 of a lighting circuit.

Also upon the front face of the insulating block 9, and between the stationary contact arms 11 is a metallic disk 13, the same being also provided with a central opening, which is round shaped for permitting the said shaft 8 to rotate therein, this disk 13 being formed with lateral extensions 14 formed with openings therein, for-the reception of set screws 15, whereby this disk may be rigidl secured to the block 9 and the casing A.

he disk 13 is further formed at diametrically opposite sides of the shaft 8 with a pair of arcuate slots 16 and carried by the shaft 8 and rotatin therewith and in face to face contact with the disk 13 is a relatively smaller disk 17 the same being formed with a pair of laterally extending fingers 18 which are bent forwardly as at 19 and adapted for engagement within the said slots 16 of the first mentioned disk 13. Carried by the shaft 8 and insulated therefrom as at 20, in Figure 3, is a still further disk- 21, the same being directly forwardly of the disk 17 and formed with contact arms 22, which arms are in direct alinement with the ends of the said stationary contact member 11 carried by the said insulating block a.

Adjacent the outer end of the square shaft 8, the same is grooved as at 23 for the reception of'a removable metallic plate 2i and between this plate 24 and the disk 21 carrying the contact arms 22 is a coiled spring 25 which tends to maintain the several disks in close contact with each other as well as maintaining the insulating block 9 in face to face contact with the adjacent wall of the casing of the clock A.

The extreme end of this shaft 8 projects through an opening in the switch casing B, and is reduced and screw threaded as at 26 {gr 'eciving the said finger winding mem- The remaining control shafts of the alarm clock are also extended through the back 'wall of the'switch casing B in any manner desirable, but preferably through the instrus mentality of a shaft extension similar to the shaft 8, shown in several of the figures, and in the operation of my device, the alarm is set for a predetermined time, it being of course understood that previous to the'application of my switch to an alarm clock the alarm spring is first wound to a certain degree, and after the switch has been applied to the clock, the key or fin e r member 7 may be rotated for engaging t "e movable contacts 22 with the stationary contacts 11, at which time, the circuit will be completed through the wires 12. As soon as the alarm of the clockis unwound,'the shaft 5 will rotate in a reverse direction for consequently disenga ing the movable contacts 22 from the stationary contacts 11 for thereby breakin the circuit to the wires 12.

in view of the above description when considered in conjunction with the drawings, it is believed by me that it-will be readil appreciated' by those skilled in the art, t at I have provided a highly improved form of time controlled switch which is well adapted for application to practically all types of alarm clocks, and even though I have herein shown and described the preferred embodiment of the present invention, it is nevertheless to be understood that minor changes may be made therein, without departing from the spirit and scope of the invention I as claimed.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent is:

1. A time control switch for attachment vto an alarm clock including a casin formed for receiving a gortion of said cloc a base member remova ly mounted on the rear wall of the clock having an opening therein in line with the alarm spring winding shaft, a shaft sectionextending through the opening in the base member and removably connected with the spring winding shaft at one end and projecting through an opening in the casing at the other end for removably receiving a winding handle, a air of con tacts mounted on said base mem er at opposite sides of that said shaft section, a cam disc mounted on the base member having an opening receiving said shaft. section, a cam member mounted for rotation with said shaft section and for'cooperation with the cam of said cam disc, a contact member mounted for rotation with the shaft section having contact arms for engagement with the contacts on said base member for closing the circuit between said contacts, and resilient means mounted on the shaft section and engaging the contact member for noralarm mechanism, a shaft extension of square cross section removably secured at one end to the alarm winding shaft and projecting outwardly through an opening in the casing at the other end for removably receiving the winding handle, said shaft extending through the opening in said base member, a

cam disc removably mounted on said base member having an opening in the central portion thereof receiving the extension shaft, a cam member slidably mounted on said extension shaft and rotatable therewith for cooperation with the cam disc for limiting the rotative movement of the shaft extension in one direction, a contact member hav ing a slidable insulated connection with said extension shaft for rotation therewith and provided with contEct arms extending from diametrically opposite sides thereof, avpair of contacts mounted on the base member for cooperation with the contact arm, a disc member mounted adjacent the outer end of said extension shaft, and a coil spring interposed between said disc member and con tact member for normally forcing ,said contact member and cam disc toward the base member,- whereby the contact arms are held

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