US1503757A - Push button - Google Patents

Description

Patented Aug. 5, 1924.

UNITED STTES P T E N LEE P. HYNES, OF ALBANY, NEW YORK, ASSIGNOR TO CONSOLIDATED CAR-HEATING COMPANY, F ALBANY, NEW YORK,

A CORPORATION 0F WEST VIRGINIA.

PUSH BUTTON.

Application filed. January 10, 1919. Serial No. 270,517.

T0 all whom t may concern.'

Be it known that LLEE P. HYNEs, a citizen of the United States, residing at Albany, in the county of Albany and State of New York, have invented certain new and useful Improvements in Push Buttons, the following being a full, clear, and exact disclosure of the one form of my invention which I at present deem preferable.

For a detailed description of the present form of my invention, reference may be had to the following specification and to the accompanying drawing forming a part thereof, wherein- Fig. l is a horizontal and Fig. 2 a vertical section of my device.

My invention relates to a push button particularly designed for use on railway vehicles in connection with signaling systems, including a bell or buzzer for notifying the motorman when a passenger wishes to get off. For this special purpose no prior push button that I am acquainted with is entirely satisfactory, particularly with the metal cars and high voltages now employed. Such buttons are usually inserted on the post capping between the windows or in a similar location convenient to the passengers reach.

It is important tohave a small, attractive button, mechanically strong and well insulated electrically, in view of the high voltage now generally used on signaling systems. As all the wiring is hidden behind the post capping or sheathing of .the car it is essential that the button be capable of ready connection to and disconnection from the wiring without removal of the post capping. It is also important that the part of the button extending back into the side of the car be as small as possible, since in most cars the space for receiving it is limited. .Yet the button and its parts must be mechanically strong and highly insulated in spite of the restriction in size. To meet these requirements I have devised the button of the present application.

Referring to the drawing, A represents the capping of the post B. Although here shown as made of wood, the post and capping may be of metal, so far as my button'is concerned, since it does not depend for insulation on the wood and may be applied without change to a metal post and a metal capping. C is a moulded block of insulating material cylindrical in form with a seating iange D projecting laterally about mida way of its length. E is a metal shell enclosing cylindrical block C which is secured in place within t-he shell by a washer F, that is secured in turn by upsetting the edge of the shell over it from the outside.

In the front face of block C a cavity G is formed and concentric with that cavity is a round opening in the face of/the shell containing the fianged button H. The cavity G forms a chamber which receives the inner enlarged portion of said button. The shell is also formed with perforated ears J, J, by which it may be screwed to the capping. The rear end of the button is flanged and rounded, the flange being seated against the inside surface of the shell with only the small pushing extension projecting outside. A helical spring O is seated in a circular groove in the bottom of cavity G, the outer end of the spring carrying a circular contact disc K that bears against the rounded end of the button I-I. Thus the parts of the device are readily assembled and held together without screws. The button I-I will be placed in its receiving hole in the shell; then the block C with the spring O and disc K in place therein will be inserted in the shell and secured by the washer D. Through the block C extend two offset bars P1 and P2, the front ends of these bars being adjacent to Contact disc K and their rear ends being offset on each side of a barrier Q that projects from the rear end of block C. These rear ends of the bars P1, P2 are provided with binding screws for the respective circuitwires which pass up through the post into the cavity S that receives the rear end of the button-structure. The binding screws pass through the offset ends of bars P1, P2 and under recesses in the block C. In use, my device is furnished in permanently assembled condition, it being unnecessary to open it and reassemble it in the car in order to make the electrical connections and place it in operating position. There are merely the two external terminals of bars P1 and P2 to be manipulated; these are connected to the respective lead wires (which will be of sufcient length to reach out in front of the capping) and the device then pushed into its circular receiving recess and secured to the capping by the screws through ears J, J. By the arrangement described, I secure adequate mechanical strength and insulation lea! that stands a regular shop test of i2000/volts althouglrtlie blocks() is a-t its frearend but iive-eighths of' an inch in diameter `with an over-all length ot one and one-quarter inches. Obviously ythe pressing vin of the button H will bring the disc K into contact with the two outer extremities of barsfll, 1PZ and close the electric circuit through the wires connected to said bars.

Vhat I claim as new and desire to secure by Letters Patent is:

ll. Ain electric push button comprising -a shell having an opening therein, an insulating lblock secured within said shell and hav-4 ing a recess in its outer'end registering with said opening, a lbutton working in said opening and having an ven'laiged portion located within said recess, conductor bars embedded within said block and having ends projecting into said recess, a contact -piece within said recess and movable independently of said button, and a spring acting to normally press said contact piece and said button away from the lprojecting ends of said conducting bars, said spri-nglbearing againstthe contact vpiececontiguous to the ,periphery of the latter.

, 2. An electric push button comprising a shell `having an `opening therein, an insulating block secured 4within said shelland hav ing a recess in its outer end registering with said-opening, the inner end of said bloc-k having a projection providing an insulating barrier, la buttonworking in the opening of said shell and having an enlarged portion within said recess, vconducting bars having ends projecting into said recess the other ends A4ott said conducting bars projecting on `opposite sides off said insulating lbarrier, la contact vpiece vwithin said recess and movable v independently ot said button, and a spring acting to normally press said Contact Ypiece vand said button away from the projecting Yends of said conduct-ing bars, said `spring bearing yagainst the contact piece contiguous lto -tlie periphery of lthe latter.

Signed at Alba-ny, N. Y., J an. 7, -1919.

f LEE fr. Hynes

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