US1098849A

US1098849A - Switch.

Info

Publication number: US1098849A
Application number: US80316413A
Authority: US
Inventors: Ezra E Smart; George H Hart
Original assignee: Hart Manufacturing Co
Current assignee: Hart Manufacturing Co
Priority date: 1913-11-26
Filing date: 1913-11-26
Publication date: 1914-06-02
Anticipated expiration: 1931-06-02

Description

E, Ea SMM-LT G. H. HART.

SWITH APPLIU'HON FILED NOV. 26, N13Y Ptnted June 2, 19121.

2 SHEETS-SHEET 1.

Familie@ June 2, 1914.

2 SHEETS-SHEET 2.

tending to dra\7 the anti-friction rollers together, causelthe anti-friction rollers fe along the cam toward the base ,rfa e rEhe anti-friction rollers being connected to the switch arm, so that these parts move together longitudinally along the axis of the plunger ll, carry the switch arm with them so as to cause it to engage the contacts 5--5 and close the switch, the part being lthen in the position shown in Fig. 2. When the parts are in the position shown in Fig. 2, the pressure upon the handle ll causes the plunger il, together with the cam surfaces l2-l2 to move toward the base Ll, until the high points of the cam pass beyond the axes of the shafts 24E-24X, whereupon the reverse action takes place, the antilfriction rollers traveling down the cani surfaces which are inclined toward the handle il, and carrying the switch arm into open position as shown in Fig. l.

The contact surfaces 5-5 are curved, so as to correspond to the curve of the wall of the cup shaped members. The surfaces of the contactmembrs 5 5 opposing the cup shaped members, are inclined or wedge shaped,A and the portions of the cup shaped members which engage with the contacts are bent away from one another so as to form with the wedge shaped openings for. engagement therewith, thus insuring an ample electrical engagement with parts of relatively small dimensions.

The action of the switch both on closing and opening, is a free quick snap action, being due to the fact that the anti-friction rollers 23-23 have no movement, which is independent of the-switch arm, longitudinally of the plunger ll, and are forced toward the oppositeinclined cam surfaces 12- 12 bythe springs 25-25.

As will be evident to those skilled in the art, our invention permits of various modifications without departing from the spirit' thereof or the scope of the appended claims.

What we claim is: f l. In a switch, the combination of stationary switch contacts, adapted to be electrically connected to circuit conductors, a movable switch arm for lelectrically connecting and disconnecting said contacts, a plunger assing through said switch arm, a cam havmg oppositely inclined cam surfaces carried by said plunger, an anti-friction roller carried by said switch arm, said switch arm and roller moving with each other longitudinally of saidplunger, said roller having a. movement independent of said switch arm in a direction transverse to the axis of said plunger, shafts extending from the ends of said roller and through transverse openings in said switch arm, and springs engaging the ends of said shaft, and tending to move said roller toward saidplunger.

2. in a switch, the combination of stationceases ary contacts, adapted to be electrically cOn-,

nected to circuit conductors, a movable switch arm for electrically connecting and disconnecting said contacts, a plunger passing through saidiswitch arm., a cam having two pairs of oppositely inclined cam surfaces carried by said plunger and two parallel anti-friction rollers carried by said arm, said switch arm and rollers moving with each other longitudinally of said plunger, said rollers each having a movement independent of said switch arm in a direction transverse to the axis of said plunger, shafts extending from the ends of said rollers and through transverse openings, in said switch arm, and springs engaging the ends of said shafts and tending to move said vrollers toward the plunger.

3. In a switch, lthe combination of stationary contacts, adapted to be electrically connected to circuit conductors, a movable switch arm for electrically connecting and discon-, necting said contacts, a plunger passing through saidswitch arm, a cam having two pairs of oppositely inclined cam surfaces carried by said plunger and two parallel anti-friction rollers carried by said arm, said switch arm and rollers moving with each other longitudinally of said plunger, said rollers each having a movement independent of said switch arm in a direction transverse to the axis of said plunger, shafts extending .from-the ends said rollers and through transverse openings in said switch arm, and two parallel springs engaging the ends of 10 said shafts and tending to move said rollers toward the plunger.

el. ln a switch, the combination of stationary switch contacts, adapted to be electrically connected to circuit conductors, a movable switch arm for electrically connecting and disconnecting said contacts, a plunger passing through said switch arm, a cam having opp'ositely inclined cam surfaces carried by said plunger, an anti-friction roller car- 11g ried by said switch arm, said switch arm and roller moving with each otherlongitudinally o'f'said plunger, said roller having a move- .ment independent of said switch arm in a direction transverse to the axes of said plunger, shafts extending from the ends of said rollerv and through transverse openings in said switch arm, and springs engaging the ends of said shaft and tending to move said roller toward said plunger, said switch arm having 129l yielding contact arms extending parallel to the axis of said arcs of a circle.

5. In a switch,the combination of stationary switch contacts, adapted to be electrically connected to circuit conductors, a movable switch arm for electrically connecting and disconnecting said contacts, a' plunger passing through said switch arm, a cam having oppositely inclined cam 'surfaces carried 15o plunger land arranged in by said plunger, an anti-friction roller carried by said switch arm, said switch arm and roller moving1 With each other longitudinally of said plunger, said roller having a. Inove- Inent independent of said switch `drm in e direction transverse to the axis of said plunger, Shafts extending from the ends of said roller and through transverse openings in said switch ari'n, sind springs engaging the ends of said shaft. and tending` to move said roller toward said plunger, said Witch arm having two Sets of oppositely yielding Contact arms arranged in arcs of concentric circles and eX.- tending parallel to the axis' of said plunger, the free ends of seid yieldingy,A arms being adapted to engage the onpoeite sides of each of said stationary contact-S, said stationary contacte being' orcs of :i circle.

(E. lin e Switch, the combination of stationery contacts, adapted to be electrically con nected to circuit conductors, a movable cup shaped switch erin for electrically connecting and disconnecting said contacts, a snpport inside said cup shaped switch arm secured to the bottom thereof, an anti-friction roller carried by said support and moving longitudinally therewith, but having a trans verse movement independent thereof', springs for forcing said finti-friction roller toward the center of said cup shaped switch arm, a plunger passing axially through said switch arm, a cam having oppositely inclined cam surfaces carried loy said plunger :ind engaged by said anti-friction roller, and means for actuating said plunger.

, EZRA E. SMART. I GEORGE H. HART.' lWitneeses GERALD W. HART.,

' li. A. HART.