US876511A - Push-button snap-switch. - Google Patents

Description

PATENTED' JAN. 14,1908.

lim-876,511.

' J. A. YORK; PUSH- BUTTQN SMPA SWITCH.

APjPLIUATION FILED JULY 2. 1907.

UNITE STTES PATENT OFFICE.

JOHN A. YORK, OF HARTFORD. CONNECTICUT. ASSIGNOR TO THE ARROW ELECTRIC COMPANY. F HARTFORD, CONNECTKUT. A CORPORATIOY OF CONNECTICUT.

`PUSH-BUTTON SNAP-SWITCH.

Specification of Letters Patent.

Patented Jan. 14, 1908. i

Application filed July Z9` 1907. Serial No. 385.977.

T o allahom it may concern:

Be it known that l, JOHN A. YORK, a

citizen of the United States, residing at Hartford,'in the county of Hartford and State of Connecticut, have invented a new and useful Push-Button Snap-Switch, of which the following is a specification.

This invention relates to an electric switch of the type having movable contacts that are oscillated by push buttons for the purpose of being engaged with and disengaged from stationary contacts to which the circuit wires Lare connected.

The object ol the invention is to provide a simple construction which is sure and positive in action and very cheap to manufacture and assemble.

Figure'l of the accompanying drawings shows a front elevation of the operating mechanism of a switch that embodies the invention. Fig. 2 shows a rear elevation of the operating mechanism. Fig. 3 shows a side elevation of the same. Fig. a shows a front view ofthe cam plate to which the push buttons are connected. Fig. 5 shows an edge view of the cam plate. Fig. 6 shows a front-view of the lock plate. Fig 7 shows an edge view of the lock plate. Fig. 8 shows a front view of the supporting frame. Fig. 9 shows an edge .view of the supporting frame. Fig. 10 shows a side view of the locking tumbler.

rThe inclosing'receptacle with the stationary contacts which are necessarily -secured to lthe base of the receptacle, and the 'face plate are not illustrated for they form no part of the present invention and can be made of any desired material in any common latter are adapted to engage lugs 7 preferablyv thrown backwardly from the supporting frame. Projecting 'forwardly from the lock plate is an arm 8 and engaging the opposite edges of this arm are the ends of a spring 9 that is coiled upon the hub 10 that projects from. the supporting frame and supports the spindle.

Mounted on the supporting hub is a plate 1l. to which the push buttons 'l2 are connected by the Shanks 13. This plate has an arm 16 that projects forwardly parallel with and adjacent to the arm that projects from the lock plate, and is embraced by the opposite ends of the coiled spring. The edge of the plate to which the push buttons are connected is formed with inclined or cam surfaces 14 and embracing this edge of the cam plate is a forked tumbler 15. This tumbler is shown as made of two pieces of metal that are loosely inserted in a slot in the back and a slot in the base of the supporting frame so that as thel cam plate is oscillated bac-k and forth by pushing in the buttons, the tumbler is first held backwardly with a part extending through the su porting 'frame in the path of a locking shou der of the lock plate and afterwards withdrawn from in front ofthis locking shoulder so the lock plate can be thrown by the spring.

Nhen a button is pressed inwardly and the cam platej is oscillated the cam plate arm engages one end of the coiled spring and places the spring under tension in a common manner.

During this period the rear edge of the tumbler is held in the path of the lock plate. After the spring is under sufficient tension the cam plate` withdraws the edge of the oscillating tumbler from in front of the locking shoulf der and allows the lock plate to be thrown by the push of the other end of the spring against the arm that projects forwardly 'from the lock plate. The lock plate can not move until a push button has been pushed in a sucient distance to withdraw the tumbler from the path of the lock plate and the spring is under sufficient tension to throw the lock plate, the spindle and connected movable contacts, with sui'licient 'force to cause them to engage with or be disengaged from the stationary contacts in the proper manner to close or open the circuit. The engagement of the stop shoulders of the lock plate with the stop lugs on the frame stop the parts'in the desired positions.

The .invention claimed is:

1. An electric switch mechanism having movable contacts, a lock plate connected with and adapted to move the contacts, a cam plate, push buttons connected with and .adapted to move the'eam plate, aitumbler adapted to bemoved by the cam plate lin and out through the supportin plate into and outof the path of the lock ate,-and a spiral s ring adapted to be place under tension by t 1e 'movement of the lpush buttons and to throw the look plate and movable poles after the tumbler has been withdrawn from the substantially as specified. 4

2. An electric switch having movable contacte, a l'ock plate connected with and con- 'lock plate by the movement of the cam plate,

4trolling the movement of the contacts, push buttons, a cam plate connected with the push buttons, a tumbler moved substan-v tially parallel With the axis 'of the movable contacts by the movement of the cam plate,

and a spring for throwing the lock plate placed under tension by the movement of the cam plate, substantially as specified.

' 3. An electric switch havl movable coml tacts, a' lock plate controllmg the movement of the contacts, push buttons, a cam plate moved by the movement of the push buttonsfa tumbler moved by the movement of the .cam plate transversely of the .plane of the'movement of the lock plate, anda spring for throwing the lock plate made tense -by the movement of the cam plate, substantially as specified.

4 JOHN A. YORK. v.Witnesses:

HARRY R. WILLIAMS, LENA C. BERRY.

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