US 4,010,382 A · Push-button type pulse generating switch

Abstract

The present invention discloses a mechanical pushbutton type pulse generating switch for use in a telephone set comprising, in general, pulse generating switch units, a push-break return-make switch unit, and an end pulse generating switch unit. The pulse generating switch unit has a common normally closed contact attached to one side surface of an operating or push-button shaft having a polygonal cross sectional configuration and a plurality of make-break contact groups attached to the remaining side surfaces of the operating shaft and brushes or wipers disposed in opposed relation with and for contact with the common and make-break contacts respectively. The push-break return-make switch unit circuit is connected in series to a parallel circuit consisting of the pulse generating switch unit circuit and the end pulse generating switch unit circuit. The push-break return-make switch unit is so arranged that the number pulses may be generated only in the return stroke of the operating shaft after the latter has been completely depressed, and the end pulse is generated immediately before the operating shaft is returned to its initial or inoperative position and immediately before the push-break return-make switch unit is opened.

Claims24

Dependent claims

A push-button type pulse generating switch comprising

a. pulse generating switching means including an operating shaft for generating number pulses in the return stroke of said operating shaft,
b. end pulse generating switching means electrically connected in parallel to said pulse generating switching means for generating an end pulse in response to the end of said return stroke
c. push-break return-make switching means electrically connected in series to both said pulse generating switching means and said end pulse generating switching means for disabling said pulse generating switching means in response to the forward stroke of said operating shaft and for energizing said pulse generating switching means and said end pulse generating switching means in response to the return stroke of said operating shaft, and
d. the number pulses and the end pulse thereby being generated when said push-break return-make switching means is closed in said return stroke of said operating shaft.

1 more element

A push-button type pulse generating switch means comprising

a. a casing having a top wall, a bottom wall and side walls;
b. pulse generating switching means for generating the number pulses in the return stroke of an operating shaft which reciprocates in its axial direction within a case extended through and attached to said top and bottom walls of said casing;
c. end pulse generating means electrically connected in parallel to said pulse generating switching means;
d. push-break return-make switching means electrically connected in series to the parallel circuit consisting of said pulse generating switching means and said end pulse generating means;
e. said pulse generating switching means comprises a common contact attached to one side surface of said operating shaft at the lower portion thereof, a plurality of make-break contacts attached to other side surfaces of said operating shaft and electrically connected to said common contact, and a first brush attached to said case for contact with said common contact and a second brush attached to said case for contact with said make-break contacts, respectively;
f. said push-break return-make switching means comprising a connecting rod supported between said side walls of said casing for rotation in response to the reciprocation of said operating shaft,
a rotary disk loosely carried by said connecting rod at its one end and provided with two stops extending from the outer side surface of said rotary disk and spaced apart from each other by a predetermined distance and with a projection outwardly radially extended from the periphery of said rotary disk,
a movable contact attached to the free end of said radial projection,
a stationary contact attached to one of said side walls for mating with said movable contact when said rotary disk is rotated in one direction, a notch being formed at the periphery of said rotary disk, a pawl means slightly attached to said one of said side walls for engagement with said notch of said rotary disk, and a driving lever carried at one end of said connecting rod for rotation in unison therewith, the free end of said driving lever being interposed between said two stops of said rotary disk;
and
g. said end pulse generating means comprises a contact arm carried at the other end of said connecting rod for rotation in unison therewith, and a stationary contact attached to the other side wall for mating with said contact arm when said connecting rod is rotated.

8 more elements

A push-button type pulse generating switch means comprising

a. a casing having a top wall, a bottom wall and side walls;
b. pulse generating switching means for generating the number pulses in the return stroke of an operating shaft which reciprocates in its axial direction within a case extended through and attached to said top and bottom walls of said casing;
c. end pulse generating means electrically connected in parallel to said pulse generating switching means;
d. push-break return-make switching means electrically connected in series to the parallel circuit consisting of said pulse generating switching means and said end pulse generating means;
e. said pulse generating switching means comprises a common contact attached to one inner side surface of said case, a plurality of make-break contacts attached to another inner side surface of said case and electrically connected to said common contact, and a first brush attached to the outer side surfaces of said operating shaft for contact with said common contact and a second brush attached to the outer side surfaces of said operating shaft for contact with said make-break contacts;
f. said push-break return-make switching means comprising a connecting rod supported between said side walls of said casing for rotation in response to the reciprocation of said operating shaft,
a rotary disk loosely carried by said connecting rod at its one end and provided with two stops extended from the outer side surface of said rotary disk and spaced apart from each other by a predetermined distance and with a projection outwardly radially extended from the periphery of said rotary disk,
a movable contact attached to the free end of the radially outwardly extended projection,
a stationary contact attached to one of said side walls for mating with said movable contact when said rotary disk is rotated in one direction, a notch being formed at the periphery of said rotary disk, a pawl means swingably attached to said one side wall for engagement with said notch of said rotary disk, and
a driving lever carried at one end of said connecting rod for rotation in unison therewith, the free end of said driving lever being interposed between said two stops of said rotary disk;
and
g. said end pulse generating switching means comprises a contact arm carried at the other end of said connecting rod for rotation in unison therewith, and a stationary contact attached to the other side wall for mating with said contact arm when said connecting rod is rotated.

9 more elements

Dependencies are inferred from the claim text.

Push-button type pulse generating switch

Life of this patent

Push-button type pulse generating switch

Life of this patent

Abstract

Claims24