Paragraph indentation mechanism for typewriters

Claim 2

A paragraph indentation mechanism for a typewriter having a keyboard comprising, in combination: a frame having a lateral frame plate, a carriage rail mounted on the lateral frame plate, a carriage movably mounted on the rail and normally biased in a letter-spacing direction, a rack mounted on the carriage and extending in a carriagetravelling direction, an escapement mechanism operatively connected to the rack for controlling a step-by-step letter-spacing movement of the carriage in the letter-spacing direction, a pawl member supported on the lateral frame plate for rocking movement into engagement with the rack and for sliding movement in the carriage-travelling direction, means to limit the sliding movement of the pawl member to a limited extent corresponding to several letter spaces of the letter-spacing movement of the carriage, spring means for urging pawl member in a direction opposite to the letter-spacing direction and for rocking the pawl member in a direction out of engagement with the rack, movable abutment means in engagement with the pawl member to limit the rocking movement thereof by the spring means, and manually operable means operatively connected to the abutment means for rocking the pawl member into engagement with the rack against the force of the spring means, said manually operable means being further operatively connected through a lost-motion connection to the escapement mechanism for disabling the escapement mechanism after the pawl member is engaged with the rack, whereby the carriage is moved several spaces in the letterspacing direction from any position where the carriage is retained by the escapement mechanism.

Claim 3

A paragraph indentation mechanism for a typewriter as defined in claim 1, wherein said limiting means includes an elongated slot formed in the pawl member, and a pin secured to the lateral frame plate and passing through the slot, said pin being engaged with one end of the slot when the pawl member is in the disengaged position, and said pawl member is rocked about the pin by the manually operable means.

Claim 4

A paragraph indentation mechanism for a typewriter as defined in claim 1, wherein said manually operable means includes a rockable member roCkably mounted on the lateral frame plate and supporting said abutment means for engagement with the pawl member when the rockable member is rocked, said rockable member having a second portion which is operatively connected to the escapement mechanism when the rockable member is rocked, and wherein a special key is mounted on the keyboard and is depressible from a normal position, and an interconnecting mechanism connects the special key to the rockable member for rocking the rockable member when the special key is depressed.

Claim 5

A paragraph indentation mechanism for a typewriter having a keyboard comprising, in combination: a frame having a lateral frame plate, a carriage rail mounted on the lateral frame plate, a carriage movably mounted on the rail and normally biased in a letter-spacing direction, a rack mounted on the carriage and extending in a carriage-travelling direction, an escapement mechanism operatively connected to the rack for controlling a step-by-step letter-spacing movement of the carriage in the letter-spacing direction, a pawl member supported on the lateral frame plate for rocking movement into engagement with the rack and for sliding movement in the carriage-travelling direction, means to limit the sliding movement of the pawl member to a limited extend corresponding to several letter spaces of the letter-spacing movement of the carriage, spring means for urging the pawl member in a direction opposite to the letter-spacing direction and for rocking the pawl member in a direction out of engagement with the rack, a rockable member pivotally secured to the lateral frame plate and rockable between an inoperable and an operable position for moving the pawl member into engagement with the rack against the force of the spring means, means for normally urging the rockable member toward the inoperable position, said rockable member having a pin secured thereon which is engaged with the pawl member to limit the rocking movement thereof by said spring means when the rockable member is in the inoperable position, and having a portion operatively connected through a lost-motion connection to the escapement mechanism for disabling the escapement mechanism after the pawl member is engaged with the rack, a special key mounted on the keyboard and depressible from a normal position, and an interconnecting lever mechanism for connecting the special key to the rockable member for rocking said rockable member to the operable position when the special key is depressed, whereby the carriage is moved several spaces from any position where the carriage is retained by the escapement mechanism.

Claim 6

A paragraph indentation mechanism for a typewriter having a keyboard comprising, in combination: a frame having a lateral frame plate, a carriage rail mounted on the lateral frame plate, a carriage movably mounted on the rail and normally biased in a letter-spacing direction, a rack mounted on the carriage and extending in a carriage-travelling direction, an escapement mechanism operatively connected to the rack for controlling a step-by-step letter-spacing movement of the carriage in the letter-spacing direction, a pawl member supported on the lateral frame plate for rocking movement into engagement with the rack and for sliding movement in the carriage-travelling direction, means to limit the sliding movement of the pawl member to a limited extend corresponding to several letter spaces of the letter-spacing movement of the carriage, spring means for urging the pawl member in a direction opposite to the letter-spacing direction and for rocking the pawl member in a direction out of engagement with the rack, a rockable member pivotally secured to the lateral frame plate and rockable between an inoperable and an operable position for moving the pawl member into engagement with the rack against the force of the spring means, means for normally urging the rockable member toward the inoperable position, said rockable member having a pin secured thereon which is engaged with the pawl member to limit the rocking movement thereof by said spring means when the rockable member is in the inoperable position, and having a portion operatively connected through a lost-motion connection to the escapement mechanism for disabling the escapement mechanism after the pawl member is engaged with the rack, a special key mounted on the keyboard and depressible from a normal position, and an interconnecting lever mechanism for connecting the special key to the rockable member for rocking said rockable member to the operable position when the special key is depressed, whereby the carriage is moved several spaces from any position where the carriage is retained by the escapement mechanism.

Claim 7

A paragraph indentation mechanism for a typewriter as defined in claim 4, wherein said rocking and sliding movement of the pawl member and said rocking movement of the rockable member are in a plane parallel to that of the lateral frame plate.

Claim 8

A paragraph indentation mechanism for a typewriter as defined in claim 4, wherein said pin on the rockable member extends from one side edge thereof, and the pin serves to maintain the pawl member in engagement with the rack against the force of said spring means while the special key is depressed.

Claim 9

A paragraph indentation mechanism for a typewriter having a keyboard comprising, in combination: a frame having a lateral frame plate, a carriage rail mounted on the lateral frame plate, a carriage movably mounted on the rail and normally biased in a letter-spacing direction, a rack mounted on the carriage and extending in a carriage-travelling direction, an escapement mechanism operatively connected to the rack for controlling a step-by-step letter-spacing movement of the carriage in the letter-spacing direction, said escapement mechanism including a toothed member and a pair of pawls rockably mounted on the later frame plate to engage alternately with the toothed member, one of said pawls being a holding pawl normally engaged with the toothed member anD the other being a feeding pawl normally disengaged from the toothed member, a pawl member supported on the lateral frame plate for rocking movement into engagement with the rack and for sliding movement in the carriage-travelling direction means to limit the sliding movement of the pawl member to a limited extent corresponding to several letter spaces of the letter-spacing movement of the carriage, spring means for urging the pawl member in a direction opposite to the letter-spacing direction and for rocking the pawl member in a direction out of engagement with the rack, movable abutment means in engagement with the pawl member to limit the rocking movement thereof by the spring means, a rockable member pivotally secured to the lateral frame plate and rockable between an inoperable and an operable position for moving the pawl member into engagement with the rack against the force of said spring means, means for normally urging the rockable member to the inoperable position, an intermediate lever pivotally secured to the lateral frame plate and located between the escapement mechanism and the rockable member, said rockable member in the operable position being operatively engaged with the intermediate member to move it into engagement with the holding pawl, thereby to disengage the holding pawl from the toothed member after the rockable member moves the pawl member into engagement with the rack, a special key mounted on the keyboard and depressible from a normal position, and an interconnecting mechanism for connecting the special key to the rockable member for moving the rockable member from the inoperable position to the operable position when the special key is depressed, whereby the carriage is moved several spaces in the letter-spacing direction from any position where the carriage is retained by the escapement mechanism.

Claim 10

A paragraph indentation mechanism for a typewriter having a keyboard comprising, in combination: a frame having a lateral frame plate, a carriage rail mounted on the lateral frame plate, a carriage movably mounted on the rail and normally biased in a letter-spacing direction, a rack mounted on the carriage and extending in a carriage-travelling direction, an escapement mechanism operatively connected to the rack for controlling a step-by-step letter-spacing movement of the carriage in the letter-spacing direction, said escapement mechanism including a toothed member and a pair of pawls rockably mounted on the later frame plate to engage alternately with the toothed member, one of said pawls being a holding pawl normally engaged with the toothed member anD the other being a feeding pawl normally disengaged from the toothed member, a pawl member supported on the lateral frame plate for rocking movement into engagement with the rack and for sliding movement in the carriage-travelling direction means to limit the sliding movement of the pawl member to a limited extent corresponding to several letter spaces of the letter-spacing movement of the carriage, spring means for urging the pawl member in a direction opposite to the letter-spacing direction and for rocking the pawl member in a direction out of engagement with the rack, movable abutment means in engagement with the pawl member to limit the rocking movement thereof by the spring means, a rockable member pivotally secured to the lateral frame plate and rockable between an inoperable and an operable position for moving the pawl member into engagement with the rack against the force of said spring means, means for normally urging the rockable member to the inoperable position, an intermediate lever pivotally secured to the lateral frame plate and located between the escapement mechanism and the rockable member, said rockable member in the operable position being operatively engaged with the intermediate member to move it into engagement with the holding pawl, thereby to disengage the holding pawl from the toothed member after the rockable member moves the pawl member into engagement with the rack, a special key mounted on the keyboard and depressible from a normal position, and an interconnecting mechanism for connecting the special key to the rockable member for moving the rockable member from the inoperable position to the operable position when the special key is depressed, whereby the carriage is moved several spaces in the letter-spacing direction from any position where the carriage is retained by the escapement mechanism.

Claim 11

A paragraph indentation mechanism for a typewriter having a keyboard comprising, in combination: a frame having a lateral frame plate, a carriage rail mounted on the lateral frame plate, a carriage movable mounted on the rail and normally biased in a letter-spacing direction, a rack mounted on the carriage and extending in a carriage-travelling direction, an escapement mechanism operatively connected to the rack for controlling a step-by-step letter-spacing movement of the carriage in the letter-spacing direction, said escapement mechanism including a toothed member and a pair of pawls rockably mounted on the lateral frame plate to engage alternately with the toothed member, one of said pawls being a holding pawl normally engaged with the toothed member and the other being a feeding pawl normally disengaged from the toothed member, a pawl member supported on the lateral frame plate for rocking movement into engagement with the rack and for sliding movement in the carriage-travelling direction, said rocking and sliding movement of said pawl member being in a plane parallel to that of the lateral frame plate, means to limit the sliding movement of the pawl member to a limited extent corresponding to several letter spaces in the letter-spacing movement of the carriage, spring means for urging the pawl member in a direction opposite to the letter-spacing direction and for rocking the pawl member in a direction out of engagement with the rack, rockable member pivotally secured to the lateral frame plate and rockable in a plane parallel to that of the lateral frame plate between an inoperable and an operable position for moving the pawl member into engagement with the rack against the force of said spring means, means for normally urging said rockable member to the inoperable position, a two-armed lever pivotally secured to the lateral frame plate and rockable in a plane parallel to that of the lateral frame plate, one arm of said lever being engaged with said holding pawl of the escapement mechanism, said rockable member having a pin secured thereOn which is engaged with the pawl member and limits the rocking movement thereof by said spring means when the rockable member is in the inoperable position, and having a portion engageable with another arm of the two-armed lever, said portion being spaced from the other arm of the two-armed lever when the rockable member is in the inoperable position and and being engaged with other arm of the two-armed lever when the rockable member is rocked from the inoperable position to the operable position, said two-armed lever being rocked by engagement of said portion and said other arm thereof for causing the one arm thereof to move the holding pawl out of engagement with the toothed member, thereby to disable the escapement mechanism after the pawl member is engaged with the rack, a special key mounted on the keyboard and depressible from a normal position, and an interconnecting mechanism for connecting the special key to the rockable member for moving the rockable member from the inoperable position to the operable position when the special key is depressed, whereby the carriage is moved several spaces in the letter-spacing direction from any position where the carriage is retained by the escapement mechanism.

Claim 12

A paragraph indentation mechanism for a typewriter having a keyboard comprising, in combination: a frame having a lateral frame plate, a carriage rail mounted on the lateral frame plate, a carriage movable mounted on the rail and normally biased in a letter-spacing direction, a rack mounted on the carriage and extending in a carriage-travelling direction, an escapement mechanism operatively connected to the rack for controlling a step-by-step letter-spacing movement of the carriage in the letter-spacing direction, said escapement mechanism including a toothed member and a pair of pawls rockably mounted on the lateral frame plate to engage alternately with the toothed member, one of said pawls being a holding pawl normally engaged with the toothed member and the other being a feeding pawl normally disengaged from the toothed member, a pawl member supported on the lateral frame plate for rocking movement into engagement with the rack and for sliding movement in the carriage-travelling direction, said rocking and sliding movement of said pawl member being in a plane parallel to that of the lateral frame plate, means to limit the sliding movement of the pawl member to a limited extent corresponding to several letter spaces in the letter-spacing movement of the carriage, spring means for urging the pawl member in a direction opposite to the letter-spacing direction and for rocking the pawl member in a direction out of engagement with the rack, rockable member pivotally secured to the lateral frame plate and rockable in a plane parallel to that of the lateral frame plate between an inoperable and an operable position for moving the pawl member into engagement with the rack against the force of said spring means, means for normally urging said rockable member to the inoperable position, a two-armed lever pivotally secured to the lateral frame plate and rockable in a plane parallel to that of the lateral frame plate, one arm of said lever being engaged with said holding pawl of the escapement mechanism, said rockable member having a pin secured thereOn which is engaged with the pawl member and limits the rocking movement thereof by said spring means when the rockable member is in the inoperable position, and having a portion engageable with another arm of the two-armed lever, said portion being spaced from the other arm of the two-armed lever when the rockable member is in the inoperable position and and being engaged with other arm of the two-armed lever when the rockable member is rocked from the inoperable position to the operable position, said two-armed lever being rocked by engagement of said portion and said other arm thereof for causing the one arm thereof to move the holding pawl out of engagement with the toothed member, thereby to disable the escapement mechanism after the pawl member is engaged with the rack, a special key mounted on the keyboard and depressible from a normal position, and an interconnecting mechanism for connecting the special key to the rockable member for moving the rockable member from the inoperable position to the operable position when the special key is depressed, whereby the carriage is moved several spaces in the letter-spacing direction from any position where the carriage is retained by the escapement mechanism.

Claim 13

A paragraph indentation mechanism for a typewriter having a keyboard comprising, in combination: a frame having a lateral frame plate, a carriage rail mounted on the lateral frame plate, a carriage movably mounted on the rail and normally biased in a letter-spacing direction, a rack mounted on the carriage and extending in a carriage-travelling direction, an escapement mechanism operatively connected to the rack for controlling a step-by-step letter-spacing movement of the carriage in the letter-spacing direction, said escapement mechanism including an escapement wheel and a pair of pawls pivotally mounted on the lateral frame plate to engage alternately with the escapement wheel, one of said pawls being a holding pawl normally engaged with the escapement wheel and the other being a feeding pawl normally disengaged from the escapement wheel, a pawl member supported on the lateral frame plate for rocking movement into engagement with the rack and for sliding movement in the carriage-travelling direction, said rocking and sliding movement of the pawl member being in a plane parallel to that of the lateral frame plate, means to limit the sliding movement of the pawl member to a limited extent corresponding to several letter spaces of the letter spacing movement of the carriage said limiting means including a long slot formed in the pawl member and a pin secured to the lateral frame plate passing through the slot, a spring disposed between the pawl member and the lateral frame plate for urging the pawl member in a direction opposite to the letter-spacing direction toward one end thereof where said pin is engaged with one end of the slot and for rocking the pawl member in a direction out of engagement with the rack, a rockable member pivotally secured to the lateral frame plate and rockable in a plane parallel to that of the lateral frame plate between an inoperable and an operable position for moving the pawl member into rocking engagement with the rack against the force of the spring, means for normally urging said rockable member to the inoperable position, a two-armed lever pivotally secured to the lateral frame plate and rockable in a plane parallel to that of the lateral frame plate, one arm of said two armed lever being engaged with said holding pawl of the escapement mechanism, a special key mounted on the keyboard and depressible from a normal position, and an interconnecting mechanism for connecting the special key to the rockable member for moving the rockable member from the inoperable position to the operable position when the special key is depressed, whereby the carriage is moved several spaces in the letter-spacing direction from any position where the carriage is retained By the escapement mechanism.

Claim 14

A paragraph indentation mechanism for a typewriter having a keyboard comprising, in combination: a frame having a lateral frame plate, a carriage rail mounted on the lateral frame plate, a carriage movably mounted on the rail and normally biased in a letter-spacing direction, a rack mounted on the carriage and extending in a carriage-travelling direction, an escapement mechanism operatively connected to the rack for controlling a step-by-step letter-spacing movement of the carriage in the letter-spacing direction, said escapement mechanism including an escapement wheel and a pair of pawls pivotally mounted on the lateral frame plate to engage alternately with the escapement wheel, one of said pawls being a holding pawl normally engaged with the escapement wheel and the other being a feeding pawl normally disengaged from the escapement wheel, a pawl member supported on the lateral frame plate for rocking movement into engagement with the rack and for sliding movement in the carriage-travelling direction, said rocking and sliding movement of the pawl member being in a plane parallel to that of the lateral frame plate, means to limit the sliding movement of the pawl member to a limited extent corresponding to several letter spaces of the letter spacing movement of the carriage said limiting means including a long slot formed in the pawl member and a pin secured to the lateral frame plate passing through the slot, a spring disposed between the pawl member and the lateral frame plate for urging the pawl member in a direction opposite to the letter-spacing direction toward one end thereof where said pin is engaged with one end of the slot and for rocking the pawl member in a direction out of engagement with the rack, a rockable member pivotally secured to the lateral frame plate and rockable in a plane parallel to that of the lateral frame plate between an inoperable and an operable position for moving the pawl member into rocking engagement with the rack against the force of the spring, means for normally urging said rockable member to the inoperable position, a two-armed lever pivotally secured to the lateral frame plate and rockable in a plane parallel to that of the lateral frame plate, one arm of said two armed lever being engaged with said holding pawl of the escapement mechanism, a special key mounted on the keyboard and depressible from a normal position, and an interconnecting mechanism for connecting the special key to the rockable member for moving the rockable member from the inoperable position to the operable position when the special key is depressed, whereby the carriage is moved several spaces in the letter-spacing direction from any position where the carriage is retained By the escapement mechanism.

Claim 15

A paragraph indentation mechanism for a typewriter having a keyboard comprising in combination: a frame having a lateral frame plate, a carriage rail mounted on the lateral frame plate, a carriage movably mounted on the rail and normally biased in a letter-spacing direction, a rack mounted on the carriage and extending in a carriage-travelling direction, an escapement mechanism operatively connected to the rack for controlling a step-by-step letter-spacing movement of the carriage in the letter-spacing direction, a pawl member supported on the lateral frame plate for rocking movement into engagement with the rack and for sliding movement in the carriage-travelling direction, means to limit the sliding movement of the pawl member to a limited extent corresponding to several letter spaces of the letter-spacing movement of the carriage, spring means for urging the pawl member in a direction opposite to the letter-spacing direction and for rocking the pawl member in a direction out of engagement with the rack, means in engagement with a pawl member to limit the rocking movement thereof by the spring means, a special key mounted on the keyboard and depressible from a normal position, a key-controlled means responsive to depression of the special key so as to move the pawl member into rocking engagement with the rack against the face of the spring means, to disable the escapement mechanism after completion of said engagement of the pawl member and the rack, thereby moving the pawl member with the rack, and to keep the pawl member in engagement with the rack while the pawl member is moved to the limited extent determined by the limiting means, said key-controlled means being responsive to release of the special key so as to effect engagement of the escapement mechanism with the rack to disengage the pawl member from the rack after completion of said engagement of the escapement mechanism, whereby the carriage is moved several spaces in the letter-spacing direction from any position where the carriage is retained by the escapement mechanism.

Claim 16

A paragraph indentation mechanism for a typewriter having a keyboard comprising in combination: a frame having a lateral frame plate, a carriage rail mounted on the lateral frame plate, a carriage movably mounted on the rail and normally biased in a letter-spacing direction, a rack mounted on the carriage and extending in a carriage-travelling direction, an escapement mechanism operatively connected to the rack for controlling a step-by-step letter-spacing movement of the carriage in the letter-spacing direction, a pawl member supported on the lateral frame plate for rocking movement into engagement with the rack and for sliding movement in the carriage-travelling direction, means to limit the sliding movement of the pawl member to a limited extent corresponding to several letter spaces of the letter-spacing movement of the carriage, spring means for urging the pawl member in a direction opposite to the letter-spacing direction and for rocking the pawl member in a direction out of engagement with the rack, means in engagement with a pawl member to limit the rocking movement thereof by the spring means, a special key mounted on the keyboard and depressible from a normal position, a key-controlled means responsive to depression of the special key so as to move the pawl member into rocking engagement with the rack against the face of the spring means, to disable the escapement mechanism after completion of said engagement of the pawl member and the rack, thereby moving the pawl member with the rack, and to keep the pawl member in engagement with the rack while the pawl member is moved to the limited extent determined by the limiting means, said key-controlled means being responsive to release of the special key so as to effect engagement of the escapement mechanism with the rack to disengage the pawl member from the rack after completion of said engagement of the escapement mechanism, whereby the carriage is moved several spaces in the letter-spacing direction from any position where the carriage is retained by the escapement mechanism.

Claim 17

A paragraph indentation mechanism for a typewriter as defined in claim 10, wherein said limiting means includes a long slot formed in the pawl member and a pin secured to the lateral frame plate passing through the slot, said pin being engaged with one end of the slot when the pawl member is in the disengaged position, and wherein said pawl member is rocked about the pin by said key-controlled means.