Apparatus for driving and controlling solenoid impact imprinter
First Claim
1. A solenoid apparatus, comprising:
- (a) a housing having a bore extending therethrough;
(b) a shaft slidably disposed in the bore of the housing;
(c) a solenoid coil secured within said housing;
(d) a plunger attached to a first end of the shaft;
(e) a dowel attached to the plunger; and
(f) the housing including;
(i) a first and second stack of laminations wherein laminations within said first and second stack are secured to adjacent laminations;
(ii) alignment means for holding said first and second stack in alignment; and
(iii) a center block having an alignment cavity, the center block disposed between the first and second stack of laminations;
(iv) wherein all the laminations in the solenoid apparatus are immobile in said housing, and wherein the dowel is slidably disposed within the alignment cavity.
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Accused Products
Abstract
A method and apparatus for a two-pulse solenoid embossing system implementing an amplitude feedback circuit, i.e., current monitor (48), to provide precise amplitude and timing control over two current pulses (4, 5), and thereby provide precision control over the position and velocity of the embossing system'"'"'s print elements (64a, 64b). To maintain the current amplitude during the second current pulse (5), the method and apparatus alternatively switches the power on and off to the solenoid coils (55) with a frequency such that a substantially constant current amplitude is maintained in the solenoid coils (55). The embossing system provides an improved solenoid body assembly (61) including a first stack of steel laminations (93), a center block (82) and a second stack of steel laminations (81). A plunger (62) is slidably connected to the solenoid body assembly (61) by shaft (63). Cavities (79) receive dowel pins (71) which are attached to plunger (62). The cavity and dowel pin arrangement (79, 71) prevents the plunger (62) from rotating.
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Citations
8 Claims
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1. A solenoid apparatus, comprising:
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(a) a housing having a bore extending therethrough; (b) a shaft slidably disposed in the bore of the housing; (c) a solenoid coil secured within said housing; (d) a plunger attached to a first end of the shaft; (e) a dowel attached to the plunger; and (f) the housing including; (i) a first and second stack of laminations wherein laminations within said first and second stack are secured to adjacent laminations; (ii) alignment means for holding said first and second stack in alignment; and (iii) a center block having an alignment cavity, the center block disposed between the first and second stack of laminations; (iv) wherein all the laminations in the solenoid apparatus are immobile in said housing, and wherein the dowel is slidably disposed within the alignment cavity. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A solenoid apparatus, comprising:
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(a) a housing having a bore extending therethrough; (b) a shaft slidably disposed in the bore of the housing; (c) a solenoid coil secured within said housing; (d) a plunger attached to a first end of the shaft; (e) a dowel attached to the plunger; and (f) the housing including; (i) a first and second stack of laminations wherein laminations within said first and second stack are secured to adjacent laminations; (ii) alignment means for holding said first and second stack in alignment; and (iii) a center block having a shaft cavity and an alignment cavity, the center block disposed between the first and second stack of laminations; (iv) wherein the shaft is slidably disposed within the shaft cavity and wherein the dowel is slidably disposed within the alignment cavity.
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Specification