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Switch Actuating Mechanism

IP.com Disclosure Number: IPCOM000077165D
Original Publication Date: 1972-Jun-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 3 page(s) / 91K

Publishing Venue

IBM

Related People

Colglazier, DF: AUTHOR [+2]

Abstract

The mechanism holds slidable switch buttons 20 in actuated positions until an enter button 22 has been depressed and released.

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At least one non-text object (such as an image or picture) has been suppressed.
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Switch Actuating Mechanism

The mechanism holds slidable switch buttons 20 in actuated positions until an enter button 22 has been depressed and released.

There are a series of the buttons 20, and each is mounted on a longitudinally movable bar 24 that carries a thin strip 26 having rows of openings 28 therethrough. A switch assembly 30 has a row of elastic diaphragm switches 32 therein each actuated by balls 34, and the balls 34 are in position to align with one of the openings 25. The button 22 is connected by a rod 36 with a bell crank 38 fixed on a shaft 40, rotatably mounted in side frames 42 and 44. Another bell crank 46 is fixed on shaft 40, and springs 45 and 50 yieldably hold the bell cranks 35 and 46 in their illustrated positions. A link 52 connects bell crank 46 with over-center mechanism 54 which comprises links 54a and 54b. Similar over- center mechanism 56 on the other side comprising links 56a and 56b, is connected by link 58 with bell crank 35. Each of bars 24 is provided with serrations 60 on its lower edge, and a leaf spring 62 extends beneath over-center mechanism 56 on the other side comprising links 56a and 56b, is connected by link 58 with bell crank 38. Each of bars 24 is provided with serrations 60 on its lower edge, and a leaf spring 62 extends beneath the bar 24 and has an upwardly extending detent portion 64 on its end adapted to enter the serrations
60. A spring 66 is effective on each of bars 24 tending to pull the bars upwardly and to the left as they are illustrated.

Over-center mechanism 54 comprises a shaft 68 and pins 70 and 72. The shaft 65 extends through the mechanism from one side to another, and pins 70 and 72 are fixed on the ends of a bar 76 which extends transversely across the mechanism. The side frame 42 is provided with vertically extending slots 78 and 80 therein for receiving shaft 68 and pin 72, respectively, and is formed with a semicircular slot 52 for receiving pin 70. Over-center mechanism 56 has substantially the same construction as the over-center mechanism 54, as just described. A bar 84, having a triangular end portion 85, is rotatably mounted on frame 42 by shoulder screw 86 and has a similar pivotal connection with side frame 44 on the other side. Pin 87 and slot 88 limit swinging movement of bar
54. A link 69 connects pin 70 with pin 57, which extends through a slot 90 provided in link 89. Link 89 has a cam surface 92 that is adapted to be effective on a pin 94 fixed to bar 54. A spring 96 connects shaft 70 with pin 94. An electromagnet 98 is fixed with respect to side frame 44 and has an armature 100 that is fixed to link 58, for releaseably holding link 98 in an energized position.

Buttons 20 a...