GB Patent: GB-528,996
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| Improvements Relating to Push-button Control Mechanisms
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Patentees:
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| Webster & Bennett, Ltd. (exact or similar names) - Coventry, Warwick County, England |
| Henry Thomas Mayo (exact or similar names) - Coventry, Warwick County, England |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
May 19, 1939 |
| Granted: |
Nov. 12, 1940 |
Espacenet patent
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Joel Havens
"Vintage Machinery" entry for Webster & Bennett
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Description: |
| Abstract:
A push-button control mechanism comprises a number of switches actuated by a series of slid able push bars arranged parallel with each other and adapted to act through a series of slid able or rotatable members. Push-button bars h fitted with push-buttons i are arranged in a, single row in a frame a and urged towards their inoperative position by springs j. Each bar has one or more pins p adapted to co-operate with inclined grooves o in transverse bars b adapted to actuate switches against the action of springs e. Each push-button when depressed acts through an inclined surface or surfaces and at the same time an additional pin on the bar passes through a similar gap in a locking bar, which snaps back under the influence of spring q to lock the particular push-button until a second pushbutton or unlocking push i<1> is depressed. The push bars may pass through inclined holes in the bars and the pushes may be arranged in two banks, grooves being provided on both sides of the locking bar. In a modification, the actuating and locking members are in the form of discs freely mounted on a common spindle and are actuated by push bars arranged around that spindle. The discs have inclined slots to co-operate with pins on the push bars, V-shaped cam-grooves to co-operate with the switch spindles, and spring-loaded plungers to return them to their inoperative positions. |
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