Patent US3835976A successfully refreshed from Google Patents.
US3835976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for moving a print element carrier in typewriters
Assignee: Olympia Werke AG
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Filing: 1973-08-21
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Granted: 1974-09-17
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Expires: 1993-08-21
Abstract
Abstract In a typewriter or similar printing machine the print element carrier is moved by virtue of the cooperation between a lead screw stationarily supported in the machine frame and a rotatable nut member supported in the print element carrier and threadedly engaging the lead screw. The print element carrier supports a clutch which has two inputs including driven components continuously rotated in opposite directions. An escapement mechanism, when in its normal, non-actuated condition, locks both inputs for preventing any driving torque to be transmitted to the nut member by either continuously driven component. A twoposition selector mechanism locks either the one or the other input. When the escapement mechanism is actuated, the latter is withdrawn from both inputs and, as a result, a driving torque is transmitted to the nut member solely by that clutch input which is not locked by the selector mechanism.
Inventors
- 👤 H Behrens
- 👤 G Wohlbier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:58
CPC Classifications
B; B41; B41J; B41J19/00; B41J19/18; B41J19/20; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/1987; Y10T74/19893; Y10T74/19898; Y10T74/19902
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
420 words
In a type printing business machine having a machine frame, a print element carrier arranged for movement along the line of print, a lead screw supported in the machine frame parallel to the line of print, a nut member threadedly engaging the lead screw and supported in the print element carrier, the latter being moved along the line of print upon relative rotation between the lead screw and the nut member, the improvement comprising in combination: a. means for operationally stationarily supporting said lead screw in said machine frame; b. first driving means supported in said print element carrier for continuous rotation in a first direction; c. second driving means supported in said print element carrier for continuous rotation in a second, opposite direction; d. means for imparting a continuous rotation to said first and second driving means; e. means for rotatably supporting said nut member in said print element carrier; f. a clutch supported in said print element carrier and including 1. a first input means having a first position for maintaining said nut member disengaged from said first driving means and a second position for drivingly connecting said first drive means with said nut member to rotate the latter in one direction; 2. a second input means having a first position for maintaining said nut member disengaged from said second driving means and a second position for drivingly connecting said second drive means with said nut member to rotate the latter in an opposite direction; 3. means urging said first and second input means into their respective said first positions; g. first trigger signal emitting means including 1. escapement means having a first position for simultaneously locking said first and second input means of said clutch in their respective said first positions, said escapement means having a second position in which it is withdrawn simultaneously from said first and second input means; 2. means for actuating said escapement means for moving said escapement means into its said second position; h. a selector member supported in said print element carrier and having a first position in which it is withdrawn from said first input means and locks said second input means in its first position, said selector member having a second position in which it is withdrawn froM said second input means and locks said first input means in its first position; and i. second trigger signal emitting means connected to said selector member for selectively moving said selector member from one of its said positions into the other.
Claim 2
Dependent Claim
420 words
In a type printing business machine having a machine frame, a print element carrier arranged for movement along the line of print, a lead screw supported in the machine frame parallel to the line of print, a nut member threadedly engaging the lead screw and supported in the print element carrier, the latter being moved along the line of print upon relative rotation between the lead screw and the nut member, the improvement comprising in combination: a. means for operationally stationarily supporting said lead screw in said machine frame; b. first driving means supported in said print element carrier for continuous rotation in a first direction; c. second driving means supported in said print element carrier for continuous rotation in a second, opposite direction; d. means for imparting a continuous rotation to said first and second driving means; e. means for rotatably supporting said nut member in said print element carrier; f. a clutch supported in said print element carrier and including 1. a first input means having a first position for maintaining said nut member disengaged from said first driving means and a second position for drivingly connecting said first drive means with said nut member to rotate the latter in one direction; 2. a second input means having a first position for maintaining said nut member disengaged from said second driving means and a second position for drivingly connecting said second drive means with said nut member to rotate the latter in an opposite direction; 3. means urging said first and second input means into their respective said first positions; g. first trigger signal emitting means including 1. escapement means having a first position for simultaneously locking said first and second input means of said clutch in their respective said first positions, said escapement means having a second position in which it is withdrawn simultaneously from said first and second input means; 2. means for actuating said escapement means for moving said escapement means into its said second position; h. a selector member supported in said print element carrier and having a first position in which it is withdrawn from said first input means and locks said second input means in its first position, said selector member having a second position in which it is withdrawn froM said second input means and locks said first input means in its first position; and i. second trigger signal emitting means connected to said selector member for selectively moving said selector member from one of its said positions into the other.
Claim 3
Dependent Claim
42 words
a second input means having a first position for maintaining said nut member disengaged from said second driving means and a second position for drivingly connecting said second drive means with said nut member to rotate the latter in an opposite direction;
Claim 4
Dependent Claim
42 words
a second input means having a first position for maintaining said nut member disengaged from said second driving means and a second position for drivingly connecting said second drive means with said nut member to rotate the latter in an opposite direction;
Claim 5
Dependent Claim
105 words
means for actuating said escapement means for moving said escapement means into its said second position; h. a selector member supported in said print element carrier and having a first position in which it is withdrawn from said first input means and locks said second input means in its first position, said selector member having a second position in which it is withdrawn froM said second input means and locks said first input means in its first position; and i. second trigger signal emitting means connected to said selector member for selectively moving said selector member from one of its said positions into the other.
Claim 6
Dependent Claim
105 words
means for actuating said escapement means for moving said escapement means into its said second position; h. a selector member supported in said print element carrier and having a first position in which it is withdrawn from said first input means and locks said second input means in its first position, said selector member having a second position in which it is withdrawn froM said second input means and locks said first input means in its first position; and i. second trigger signal emitting means connected to said selector member for selectively moving said selector member from one of its said positions into the other.
Claim 7
Dependent Claim
65 words
An improvement as defined in claim 1, said nut member including an output shaft having an axial bore, said output shaft being arranged coaxially about said lead screw, said axial bore having a threaded portion threadedly engaging said lead screw; said output shaft having, in the zone of said threaded portion, a collar-like enlargement, said threaded portion and said collar-like enlargement constituting a nut element.
Claim 8
Dependent Claim
21 words
An improvement as defined in claim 1, wherein said first trigger signal emitting means is supported in said print element carrier.
Claim 9
Dependent Claim
21 words
means urging said first and second input means into their respective said first positions; g. first trigger signal emitting means including
Claim 10
Dependent Claim
21 words
means urging said first and second input means into their respective said first positions; g. first trigger signal emitting means including
Claim 11
Dependent Claim
21 words
An improvement as defined in claim 1, wherein said second trigger signal emitting means is supported in said print element carrier.
Claim 12
Dependent Claim
155 words
An improvement as defined in claim 1, said means actuating said escapement means including an energizable escapement solenoid; said escapement means including an escapement bridge pivotally supported in said print element carrier, means operatively connecting said escapement solenoid with said escapement bridge, actuating members freely rotatably supported on said escapement bridge and cooperating with said input means of said clutch, spring means urging said actuating members into a locking engagement with said first and second input means, said locking engagement corresponds to said first position of said escapement means, said escapement means further including escapement levers affixed to said escapement bridge and operatively connected to said actuating members for moving the latter against the force of said spring means into a withdrawn position with respect to said first and second input means of said clutch in the energized condition of said escapement solenoid, said withdrawn position corresponds to said second position of said escapement means.
Claim 13
Dependent Claim
49 words
An improvement as defined in claim 1, including axially aligned radial and thrust bearings mounted in said print element carrier; said bearings receiving axial ends of said nut member for rotatably supporting the same, one of said bearings being adjustable for setting the axial play of said nut member.
Claim 14
Dependent Claim
68 words
An improvement as defined in claim 1, wherein said first and second input means of said clutch respectively include a. first and second clutch input gear wheels connected for continuous, oppositely directed rotation to said first and second driving means, respectively; and b. first and second clutching members for selectively coupling said first or said second clutch input gear wheel to said nut member for rotating the latter.
Claim 15
Dependent Claim
126 words
An improvement as defined in claim 7, further comprising a main drive shaft supported in said machine frame parallel to said lead screw and arranged for guiding said print element carrier; means for continuously rotating said main drive shaft; a gear wheel block secured to said main drive shaft to rotate therewith as a unit, said gear wheel block being arranged on said main drive shaft for linear displacement with respect thereto, said gear wheel block having a first gear wheel constituting said first driving means and meshing with said first clutch input gear wheel, said gear wheel block having a second gear wheel constituting said second driving means and meshing with a reversing pinion, said reversing pinion meshing with said second clutch input gear wheel.
Claim 16
Dependent Claim
53 words
An improvement as defined in claim 1, wherein the pitch of the thread of said lead screw and said nut member is of such a magnitude as to cause said print element carrier to axially shift by one typing space upon one revolution of said nut member with respect to said lead screw.
Claim 17
Dependent Claim
37 words
An improvement as defined in claim 9, said lead screw having two operative positions 180* apart; further comprising means for rotating said lead screw into, and immobilizing the same in either one of said two operative positions.
Claim 18
Dependent Claim
64 words
An improvement as defined in claim 1, including spring means urging said selector member into one of its said two positions; said second trigger signal emitting means includes an energizable control solenoid having an armature connected to said selector member; said control solenoid, when energized, shifting said selector member into the other of its two said positions against the force of said spring means.
Claim 19
Dependent Claim
59 words
An improvement as defined in claim 11, wherein said one of said two input means of said clutch includes means for preventing said selector member from being moved by said spring means from said other of its two positions to said one of its two positions for at least one revolution of said one of said two input means.
Claim 20
Dependent Claim
68 words
An improvement as defined in claim 11, said selector member being constituted by a control slide; said nut member including means defining a groove in which said control slide is received and supported for reciprocating motion; said spring means is in engagement with said control slide to urge the latter into a position in which it locks one of said two input means in its said first position.
Claim 21
Dependent Claim
65 words
An improvement as defined in claim 13, wherein said spring means is constituted by a spring member being affixed to said nut member and having a leg portion; said control slide including means defining an opening; said nut member including means defining a slot extending along and immediately adjacent said groove; said leg portion of said spring member passes through said slot and said opening.
Claim 22
Dependent Claim
223 words
In a type printing business machine having a machine frame, a print element carrier arranged for movement along the line of print, a lead screw supported in the machine frame parallel to the line of print, a nut member threadedly engaging the lead screw and supported in the print element carrier, the latter being moved along the line of print upon relative rotation between the lead screw and the nut member, the improvement comprsing in combination: a. means for operationally stationarily supporting said lead screw in said machine frame; b. means for rotatably supporting said nut member in said print element carrier; c. a clutch supported in said print element carrier and having two input means arranged for cooperation with said nut member; each input means having a driven component; d. means for continuously rotating said driven components of said two input means in mutually opposite directions; e. a two-position selector means for selectively maintaining one of said input means locked and the other of said input means simultaneously unlocked; and f. escapement means having a deenergized position for maintaining both input means disengaged from said nut member and an energized position for operatively coupling that input means to said nut member which is maintained unlocked by said selector means, whereby a driving torque of preselected sense is applied to said nut member.
Claim 23
Dependent Claim
223 words
In a type printing business machine having a machine frame, a print element carrier arranged for movement along the line of print, a lead screw supported in the machine frame parallel to the line of print, a nut member threadedly engaging the lead screw and supported in the print element carrier, the latter being moved along the line of print upon relative rotation between the lead screw and the nut member, the improvement comprsing in combination: a. means for operationally stationarily supporting said lead screw in said machine frame; b. means for rotatably supporting said nut member in said print element carrier; c. a clutch supported in said print element carrier and having two input means arranged for cooperation with said nut member; each input means having a driven component; d. means for continuously rotating said driven components of said two input means in mutually opposite directions; e. a two-position selector means for selectively maintaining one of said input means locked and the other of said input means simultaneously unlocked; and f. escapement means having a deenergized position for maintaining both input means disengaged from said nut member and an energized position for operatively coupling that input means to said nut member which is maintained unlocked by said selector means, whereby a driving torque of preselected sense is applied to said nut member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |