US 1061578 A
Description (OCR text may contain errors)
HEINRICH \3ISt.2HEl'.`l.l'SEE` AND ,ALEXNIDEB HEPKE, UF BERLIN, GERMANY.
To all whom t may concerny Be it known that we, Hamelen lVIsoii- HUSEN and ALEXANDER Harlin, citizens of the Empire of Germany, and residing at Berlin, Germany, have invented certain new and useful Improvements in Push-Button- Switches, of which the following is a specification. y
Our invention relates to press-buttoi switches and a primary object is to provit e a simple switch of this type.
1n press-button switches known heretofore comprising rotating contact-pieces two meinbers have been provided for returning the press-button into its initial position and for giving the rotatoi'y movement to the movable contact-pieces. According to our invention we employ for these two purposes only one single spiral spring which is subjected both to compressive and to torsional strain.
One illustrative embodiment of our invention is represented by Way of example in vertical section in the accompanying draw` liteferring to the drawing, the central hole in the cover e of insulating material is ro vided with a spiral groove d in whicli is guided the upper,1 radially bent end b of the spiral spring a. The lower radially bent end c of the spiral spring,r a bears against one of the ratchet teeth on the crown wheel i fast on the switch-drum i. This drum is fast on the axle a and'carries the electrically conducting contact-ai'msm and n which in the on position connect to ether the two connectiomcontacts o and p or the wires q and r, and thus close the circuit. The axle c is journaled in a recess inthe base f and is guided at its upper end in a bore in the ress-buttonl g, which is able to move up and own in the central hole in the cover. The upward motion of the press-button g is lim ited by f. stov not shown in the drawing.
Any suite le known device may be used for arresting the `drain i in the' on" and voti positions. In the illustrative embodiment a square block c is fast on the lower end of the axle, and is located between the two Het springs l. When the axle e carrying the drurn 1s rotated the square block k' is driven forward by the action of the springs Z as soon as it has moved more than 45", and after rotating 90 from its normal position is arrested between the springs Z.
Now when the prese-button g' is depressed,
Specification o! Letters Patent.
Application flied March 25, 1812. Serial No. 666,199.
Patented May 13, MM 3.
the pressure is transmitted to the spiral spring a which is compressed in the axial di reetion. When thisvspring is depressed its upper radially lient end b which is guided in the n'roove d is simultaneously driven cir cum erontially, the result boing that the spring is subjected to torsional strain. The )torsion is increased by the continued downwai-d iiiotion of the pressbutton (l, until the spying at last overcomes ooth the friction at the contact-pieccs m, n and the tension of the springs Z, and the drum z' flies over into the next stopping position. The torsion of the spring a is hereby partly relieved. The remaining torsion apart from the initial tor sion which is always present, is used for placing the lower end c of the spring behind the next ratchet tooth to the rear on the crown wheel, rlfhe press-button g is simultaneously forced back by the axial pressure of the spiral spring d. W'e claimrd 1. In a push button switch the combination of a base plate, -a covei provided with an inner spiral groove, an axle journaled in said base plate, a drum secured to said aide, a push button movable down and up along said axle, a spiral spring arranged about the axle and havinnr one end adapted to rotate said drum anc the other guided in said spiral groove when said spring' ispoinpressed by the push button.
Q. In a press-button switch, the combination of a base-plate, a cover having a central hole mounted thereon, said hole having a spiral groove, an axle 'ournaled in the base and extending into said hole, a drum fast on the axle under the cover, a pressdiutton n1ovable down and up in said hole, a spiral spring arranged about the axle in said holo and having one end adapted to rotate said drum, the other erid of said spring being guided in said groove.
3. In a pi'ess-biiti.on switch, the combination of a base-plate, a cover having a central hole mounted thereon, said hole havinga spiral groove,an axle ournaled in't'ne base and extending into sait hole, a drum fast on #the axle under thc cover, a crown wheel rig- Ll. in a press-button switch, thocombina l I I A. 1,061,575
tion of a buse-plate, a cover `having a central hole mounted thereon, said hole having a spiral groove, an axle journaled in the base and extending into said holeI a drum fast on the axle under-the cover, a tra-own Wheel having four ratchet teeth rgidl connected with the drum, a; press-button mfable clown and up in said hole7 a spiral spring arranged about the axle in said hole and having one enrl normally resting behind one tooth of the crown Wheel`- the other end of said spring bengguided in said groove,'a square block fast on the axle, and tWoleaf springs normally bearing against opposite faces of the block. 15
ln testimony whereof, we ax our signatures in the presence of two witnesses.
HENRY HASPER, VVOLDEMAR HAUPT.