US3675172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damping apparatus for a linear actuator device
Assignee: IIS Inc
•
Filing: 1971-05-17
•
Granted: 1972-07-04
•
Expires: 1991-05-17
Abstract
Abstract A damping system used for controlling the rebound of actuator members used in high speed printers or the like is disclosed. The system involves the use of the principle that when masses collide in an elastic collision, the kinetic energy of the system remains constant. In the system, a secondary mass is free for limited movement between restraining walls at least one of which is of energy absorptive material and is positioned in the path of a rebounding actuator element. The collision between the actuator element and the mass results in a transference of kinetic energy to the secondary mass which energy is rapidly dissipated as the secondary mass collides with the energy absorptive material. Also disclosed is a holding coil for holding the actuator element following the collision with the primary mass and an intermittently operable firing coil which when energized overrides the holding force and fires the actuator element.
Inventors
- 👤 Neil J Petusky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:48
CPC Classifications
H; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/088; B; B41; B41J; B41J9/00; B41J9/42
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
97 words
Apparatus for damping the rebound oscillations of a first reciprocating element used in the recording of data on a record medium, said apparatus comprising a secondary element located in the rebound path of the first element for collision with said first element during its rebound motion, wherein the ratio of the mass of said secondary element to said first element approaches unity, said secondary element being mounted for limited movement in the direction of motion of the reciprocating element following a collision therewith and a body of energy absorptive material for limiting movement of the secondary mass.
Claim 2
Dependent Claim
97 words
Apparatus for damping the rebound oscillations of a first reciprocating element used in the recording of data on a record medium, said apparatus comprising a secondary element located in the rebound path of the first element for collision with said first element during its rebound motion, wherein the ratio of the mass of said secondary element to said first element approaches unity, said secondary element being mounted for limited movement in the direction of motion of the reciprocating element following a collision therewith and a body of energy absorptive material for limiting movement of the secondary mass.
Claim 3
Dependent Claim
23 words
Apparatus according to claim 1 wherein the ratio of masses of the secondary element relative to the first element is greater than 1.
Claim 4
Dependent Claim
26 words
Apparatus according to claim 2 wherein the ratio of the masses of the secondary element relative to the first element is between about 1.2 and 1.5.
Claim 5
Dependent Claim
31 words
Apparatus according to claim 1 wherein the length of the path of movement of the reciprocating element is long relatively to the length of path of movement of the secondary element.
Claim 6
Dependent Claim
125 words
Apparatus for damping the rebound oscillations of a linear actuator element used in the recording of data on a record medium comprising intermittently operable firing force applying means for propelling said element towards the record medium, an energy transfer member in the rebound path of said actuator element for collision with the actuation element during its rebound motion, said energy transfer member being mounted for limited movement along the path of movement of the actuator element upon a collision with the actuator member, said member and said element being formed of a relatively non-compressible material and an energy absorptive material positioned in the path of movement of saId energy transfer member for absorbing the kinetic energy of said energy transfer member upon a collision therewith.
Claim 7
Dependent Claim
125 words
Apparatus for damping the rebound oscillations of a linear actuator element used in the recording of data on a record medium comprising intermittently operable firing force applying means for propelling said element towards the record medium, an energy transfer member in the rebound path of said actuator element for collision with the actuation element during its rebound motion, said energy transfer member being mounted for limited movement along the path of movement of the actuator element upon a collision with the actuator member, said member and said element being formed of a relatively non-compressible material and an energy absorptive material positioned in the path of movement of saId energy transfer member for absorbing the kinetic energy of said energy transfer member upon a collision therewith.
Claim 8
Dependent Claim
22 words
Apparatus according to claim 5 comprising holding force applying means for holding said actuator member following rebound from said energy transfer member.
Claim 9
Dependent Claim
25 words
Apparatus according to claim 6 wherein said holding force means applies said holding force at a value which is small relative to said firing force.
Claim 10
Dependent Claim
61 words
Apparatus according to claim 5 wherein said actuator member is formed of a magnetic material, said firing force means comprising a coil surrounding said actuator member and energizable to propel said actuator member in a first direction, and wherein the number of ampere turns of the holding coil is relatively small with respect to the ampere turns of said firing coil.
Claim 11
Dependent Claim
27 words
Apparatus according to claim 5 wherein the ratio of the mass of the actuator element to the energy transfer element is between about 1.2 and about 1.5.
Claim 12
Dependent Claim
131 words
Apparatus for damping the rebound oscillations of a slug element used for high speed printing or the like comprising firing force applying means for driving the element against a record medium, an energy transfer element located in the rebound path of said slug element, said energy transfer element having a surface against which said slug element impacts when it rebounds from the surface of said record medium and being mounted for movement in response to the impact with the slug element, and an energy absorptive element on at least one side of said energy transfer element in the path of movement of the energy transfer element and positioned for collision therewith, said energy absorptive element being adapted to absorb the energy of said transfer element during rebound oscillations of said element.
Claim 13
Dependent Claim
131 words
Apparatus for damping the rebound oscillations of a slug element used for high speed printing or the like comprising firing force applying means for driving the element against a record medium, an energy transfer element located in the rebound path of said slug element, said energy transfer element having a surface against which said slug element impacts when it rebounds from the surface of said record medium and being mounted for movement in response to the impact with the slug element, and an energy absorptive element on at least one side of said energy transfer element in the path of movement of the energy transfer element and positioned for collision therewith, said energy absorptive element being adapted to absorb the energy of said transfer element during rebound oscillations of said element.
Claim 14
Dependent Claim
20 words
Apparatus according to claim 10 wherein an energy absorbing element is mounted on both sides of the energy transfer element.
Claim 15
Dependent Claim
100 words
Apparatus for damping the rebound oscillations of a slug element following the firing of the element towards a reaction surface comprising an energy transfer element located in the rebound path of said slug element, said energy transfer element being movable upon collision occurring during the rebounding of said slug element to thereby transfer kinetic energy from said slug element, secondary impact members located on either side of said transfer element in proximity thereto, at least one of said members being formed of an energy absorbing material for absorbing the kinetic energy imparted by said slug element to said transfer element.
Claim 16
Dependent Claim
100 words
Apparatus for damping the rebound oscillations of a slug element following the firing of the element towards a reaction surface comprising an energy transfer element located in the rebound path of said slug element, said energy transfer element being movable upon collision occurring during the rebounding of said slug element to thereby transfer kinetic energy from said slug element, secondary impact members located on either side of said transfer element in proximity thereto, at least one of said members being formed of an energy absorbing material for absorbing the kinetic energy imparted by said slug element to said transfer element.
Claim 17
Dependent Claim
19 words
Apparatus according to claim 12 wherein both of said secondary impact members are formed of an energy absorptive material.
Claim 18
Dependent Claim
17 words
Apparatus according to claim 13 wherein the said energy transfer element is heavier than the slug element.
Claim 19
Dependent Claim
29 words
Apparatus according to claim 14 wherein the ratio of the weight of the energy transfer element to the weight of the slug element is about 1.2 to about 1.5.
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |