US1248575A - Snap-switch for sad-irons and the like. - Google Patents

Description

S. TROGD. SNAP SWITCH Foa SAU lRoNs AND THE LIKE.

APPLICATION FILED JAN. 28. i913.

Patented Deo. 4, 1917.

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WITNESSES:

i gNVENTR Y BY ATTORNEY UNITED STATES PATENT oEEIcE.

SAMUEL TROOD, OF EDGEWOOD PARK, PENNSYLVANIA, ASSIGNOR. TO WESTINGHOUSE ELECTRIC AND MANUFACTURING COMPANY, A CORPORATION F PENNSYLVANIA.

SNAP-SWITCH FOB SAD-IBONS AND THE LIKE.

Speoinoation ofLetters Patent.

Patented' Dec. 4, 1917.v

Application led January 28, 1913. Serial No. 744,678.

` To all whom it may concern Be it known that I, SAMUEL Tnoon, a citizen of the United States, and a resident of Edgewood Park, in the county of Alle gheny and State of Pennsylvania, have invented a new and useful Improvement in Snap-Switches for Sad-Irons and the like, of which the following is a specification.

My invention relates to electric `:switching devices, and it has special reference to snapswitchesadapted for use in the handles of sad irons or 'other switch-controlled electric ap aratus.

ne object of my invention is to provide a snap switch in the handle of a sad iron or other electric appliance which shall have a quick, positive and reliable action and shall be located in the manner and place most convenient for the `user of the iron.

Another object of my invention is to provide a switch of compact and rugged construction which shall also be inexpensive to manufacture.

A further object of my invention is to provide a magnetic blowout coil in connection with the relatively movable contact members of the switch mechanism for extinguishing arcs formed by interruption of 7 the circuit.

Heretofore, switches associated with the handles of sad irons and similar implements have been of the ordinary blade or some other slow-moving type, with the consequent burning of contacts and other deleterious features which have yrendered the action of the switches more or less unreliable. Moreover, the switches provided have been bulky and expensive, entailing difliculty of installation and repair.

f According to my invention, I provide a -switch of a quick-break type, commonly plane, thus being directly adjacent to the/ natural position of the thumb and forefinger of the operator.

An illustrative embodiment of my invention, as applied to an electrically heated sad iron, is shown in the accompanying drawing, in which Figure 1 is a view in side elevation, partially in section, of a sad iron embodying my invention; Fig. 2 is an enlarged view, partially in elevation and partially in section, of the switch mechanism, showing the construction thereof; and Fig. 3 is a view of a modification of my invention employing a magnetic blowout coil in proximity to the switch contact surfaces,

making connection to an exterior source of` electrical energy. The above-named p ts, other than the handle 5 and the cont nts thereof, are old and well-known in the art and will not further be described. It should be understood, however, that my invention need not be restricted to use inthe Ihandle of a sad iron, but may be employed in-other electrical devices.

The supply conductors 11 extend through the open rear end of the handle 5, and are connected to binding posts 8 and 9 of the terminal board 7. Leads 12 extend from the binding posts 8 and 9 through the rear handle support 6 to the heating element 4, and

leads 12l connect the binding posts 9 and 9l to the contact terminals of the switch mechanism 10.

The switch mechanism 10 comprises a vertically disposed push button 13, and a conducting shell 19 concentrically disposed around the button 13 and expanded at one end to form an annular recess 2O for a Agarter spring 21 which surrounds and engages the button 13.

`A plurality of vertically alined openings 22 are provided in the handle 5, and the push button 13 is disposed to project through said openings, thus adapting the switch for operation by the user of the iron. The push-button 13 comprises four sections, namely: two outer cylindrical sections 16 and 17 composed of insulating material and adapted to extend through the openings 22 V in the handle 5, a frusto-conical section 15 of insulating material, and a frusto-conical section 14 of conducting material, provided with an integral outwardly-projecting end flange 23 for making contact with the upper wall of the recess 20 of the shell 19. The sections 14 and 15 are suitably held together to constitute a double frusto-conical cam, and the conducting portion 14 is connected to the binding post 9 by one of the leads 12a. The lower end of the shell 19 is connected to the binding post 9*?L by the second lead 12". Suitable members 24 of insulating material inclose a longitudinally-disposed supporting bar 25 attached to the body of the handle 5 for holding the switch mechanism 10 and terminal-board 7 rigidly in position. l

In the modification shown in Fig. 3, the push-button 13 and a shell 26, provided with ar recess 27 of slightly different shape from the recess 20, are inclosed by a blow-out magnet coil 28 for extinguishing arcs produced by the separation of the flange 23 and the top wall of the recess 27, which two members are connected to the opposite line terminals through the blowout coil 28 and the heater element 4, as in the switch mechanism first described.

Assuming the switch to be in the closed position, as shown in the drawing, the operation, when opening Lthe circuit, is as follows: The end =`of the push button 13 that projects through the lower opening 22 in the handle 5, is pressed inwardly against the force exerted by the garter spring 21 upon the frusto-conical section 14 until the plane 18 of the cam passes the central plane of the spring, whereupon the contact flange 23 is snapped into its off position by the contraction of the spring.

In closing the circuit, the upper end of the button 13 is pressed inwardly against the force of the spring 21 exerted against the surface of the section l5 until the plane 18 passes the central plane of the spring, whereupon the spring pressure upon the surface of section 14 will move the flange 23 into contact with the outer surface of the recess 20 with a sna action.

I do not Wish to e restricted to the specie structural details herein set forth, but desire that only such limitations shall be imposed as are indicated in the appended claims.

I claim as my invention:

1. An electric switch embodying a contact-carryingactuating member provided with a cam comprising oppositely-disposed frusto-conical sections one of which is of conducting material, a coperating stationary contact member' surrounding said actuating member, a recess disposed near one end of said stationary member, and a resilient tension member disposed within said recess and engaging said cam for giving an accelerated movement to said actuating member.

2. An electric switch embodying a contact-carrying actuating member provided with a cam comprising oppositely-disposed frusto-conical sections one of which is of conducting material, a coperating stationary hollow contact member concentrically disposed around said actuating member and provided with an annular integral recess at one end, and a garter spring disposed within said recess and engaging said cam for giving an accelerated movement to said actuating member.

3. An electric switch embodying a contact-carrying reciprocating member provided with a cam comprising oppositelydisposed frusto-conical sections one of which is of insulating material and the other of which constitutes a movable contact member, a coperating tubular stationary contact member surrounding said rociprocating member and having an annular recess near one end, and a garter spring disposed within said recess and engaging said cam for giving an accelerated movement to said reciprocating member.

4. An electric switch embodying a contact-carrying reciprocating member provided with a cam comprising oppositelydisposed frusto-conical sections one of which is of insulating material and the other of which lconstitutes a movable contact member, a coperating tubular stationary contact member concentrically disposed around said reciprocating member and provided with an annular integral recess, and a garter spring disposed within said recess and engaging said cam for giving an accel- .erated movement to said reciprocating member.

In testimony whereof, I have hereunto subscribed my name this 23rd day of J anuary, 1913. A

SAMUEL TROOD.

Witnesses:

R. J. RIDGE, B. B. HINEs.

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