Sewing – Elements – Starting or stopping
Reexamination Certificate
1999-12-30
2001-02-27
Izaguirre, Ismael (Department: 3741)
Sewing
Elements
Starting or stopping
C200S341000
Reexamination Certificate
active
06192815
ABSTRACT:
FIELD OF THE INVENTION
The present invention pertains to a push-button on a sewing machine with a said bracket rigidly connected to the sewing machine housing with a key member mounted axially displaceably in a hole of the bracket with a stop for limiting its outwardly directed displacement and with a switch, which can be arranged on the bracket and can be actuated by the key member.
BACKGROUND OF THE INVENTION
Electrically driven sewing machines sometimes have a plurality of push-buttons, which serve various purposes, e.g., to enter information, to select sewing programs stored in a memory, or to perform adjusting functions. It is expedient to arrange push-buttons that are frequently needed and to be actuated during sewing, e.g., the switch for reversing the direction of feed of the feeder, in the reaching area of operator's hands, i.e., directly above the stitch formation site in or on the head of the sewing machine housing. However, the space conditions are usually crowded in this area of the sewing machine housing or the area in which the push-button is to be mounted is poorly accessible. The installation of push-buttons especially in this area of the sewing machine housing is comparatively cumbersome and time-consuming.
SUMMARY AND OBJECTS OF THE INVENTION
The basic object of the present invention is to provide a push-button that can be mounted in a simple manner even in poorly accessible areas of a sewing machine housing.
According to the invention, a push-button on a sewing machine is provided with a bracket rigidly connected to a sewing machine housing. A key member is mounted axially displaceably in a hole of the bracket with a stop means for limiting its outwardly directed displacement and with a switch. The switch may be arranged on the bracket and can be actuated by the key member. The key member has a key stop for limiting its displacement directed toward the interior of the housing. An elastic hook-shaped holding mechanism (holding means) extends into the displacement path of the key stop and fixes the switch supported on the bracket. The elastic hook-shaped holding mechanism is arranged on the bracket.
The key stop may be formed by a stop face of two flattened areas, which extend transversely or obliquely to the direction of displacement of the key member. The switch may be fastened to a board. The board is kept in contact with the rear side of the bracket by the hook-shaped holding means. The hook-shaped holding means may be formed by elastic fingers. These fingers may be provided as an integral part of the bracket.
The switch may have a spring-loaded switch element (known per se). The spring-loaded switch element may be used as a resetting means for the key.
The present invention is based essentially on the idea of providing the bracket of the push-button, which is rigidly connected to the sewing machine housing, with elastic holding means, which are used to provisionally hold the key, on the one hand, and to fix the switch, on the other hand, when the switch is in its intended fitting position, in which it is supported on the bracket and also cooperates with the key at the same time. The key can thus be preassembled from the inside of the housing without the risk of slipping out of the bracket and falling into the interior of the housing later.
The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and specific objects attained by its uses, reference is made to the accompanying drawings and descriptive matter in which a preferred embodiment of the invention is illustrated.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings:
FIG. 1
is an exploded view of the push-button;
FIG. 2
is a sectional representation of the push-button with vertically extending sectional plane; and
FIG. 3
is a sectional representation with horizontally extending sectional plane.
REFERENCES:
patent: 3939318 (1976-02-01), Brown et al.
patent: 4055131 (1977-10-01), O'Brien et al.
patent: 4100867 (1978-07-01), Bass et al.
patent: 4485282 (1984-11-01), Lee
patent: 4988553 (1991-01-01), Saiki et al.
patent: 5520128 (1996-05-01), Rich et al.
G.M. Pfaff AG
Izaguirre Ismael
McGlew and Tuttle , P.C.
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