Carpenter Relay

Telephone Mfg Co Ltd
Type 5MH19A

R.E.H. Carpenter's Patents
Brit.
315,496: 48?,?72: 559,047: 61?,546
Austl.
120,155 146
Can. Pat.
1948
Dansk.
44.117: 58,943
S.Afric
482/43: 2369/47
Swed
124,364: 136,613
U.S.Pat. Office.
10/22/40: 12/3/46 and 7/3/51
Belg.
423,549: 465,337: 476,316
Cz-Slov
70,381
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Telephone Mfg Co Ltd
R.E.H. Carpenter's Patents
Brevete S.G.D.G.
826,506: 926,664: 955,428
Ned. Octrooi.
29,387: 666,362
Ital.
356,549: 423,800: 439,145
Portuguesa. 25831
Swiss Pat.
208,857: 266,243
Norsk. Pat.
79253
Pat. Appls. Hol., Austl., Can., Den., Ger., Norsk.

This item was in the Elliott Collection Ref: 2018

The Carpenter Relay is a high speed relay requiring low power to operate. The design stems back to before WWII and this one was manufactured by The Telephone Manufacturing Company to R.E.H. Carpenters Patents. The relay can be bistable in operation and in that mode will retain its state even if unpowered. Operating power in some designs can be less than 1mW and it can switch in around 1msecond. This unit came from the original Elliott Collection and was used in the Lightning Autothrottle Amplifier.

Rectangular metal case with an insulated base having 9 electrical connector pins.