One Man Life Raft

© Brooke Clarke 2019




Background
Items
    One Man Life Raft Reflector MX-137
    A.A.F. FC-A-685 Mast for Type C-2 Life Raft
    PRC-17A Rescue Beacon VHF/UHF Transmitter
    A-7 AAF Flashlight, Floating Identification
    Paddle
Patents
Related
References
Links

Background


This relates to my interest in survival items.  It turns out that a lot of pioneering took place in relation to One-Man Pneumatic Life Rafts (Ref 1).  When I went looking for some of the items shown in the book I found them.  Rather than put them on various web pages I'm making a new web page so they can be toghther.

Note that pilot's sat on a "pack" that contained the life raft and survival kit.  They both changed over time but the size of the pack remained constant.  15" across front, 14" deep and 2" thick.  That limits the size of what can be stored.

Items

One Man Life Raft Reflector MX-137

The MX-138 is a larger RADAR corner reflector probably used on larger life rafts or life boats.  The MX-137 is a smaller version that will fit a W.W.II pilot's seat pack.

Prior to the MX-137 one man life rafts used the CPT-2 Radar Beacon.  It could be picked up by the SCR-521, SCR-729, AN/APN-12, Navy ASE, or British MK-11 Search Radar units.

The AN/CRC-7 VHF Search and Rescue Transmitter-Receiver was the next development.  140.58 MHz Tx and Rx.  Tech Order AN 16-30 CRC-7-2.

Photos
Fig 1
One Man Life Raft
                      Reflector MX-137
Front of box marked:
One Man Life Raft Reflector MX-137/A
The Vendo Co. Kansas City
Contract No. N288-27932
Date Insp ??/??  By  ?
When Reordering Use Navy Stock No. R83-R-AN-MX-137/A
Or Army Stock No. 2Z7562-137
Fig 2
One Man Life Raft
                      Reflector MX-137
Back of box marked:

                         Do not discard this box after opening, retain
                               for use as water resisting container.
------------------ Pull this cord to open.
                         Pull handle on end cap to remove reflector.

DIRECTIONS  Further instructions inside --- Read before detaching
                          reflector from end cap.

        A.A.F. FC-A-685 Mast for Type C-2 Life Raft

I expected this to be about 15" long but it's more like 28.5" collapsed and 66" extended.  Let me know why a part for the C-2 life raft would be this long.

Fig 1
A.A.F.
                      FC-A-685 Mast for Type C-2 Life Raft
A.A.F. FC-A-685 Mast for Type C-2 Life Raft
To Open: Be sure to extend mast fully until each section locks.
To Close: Press springs in top section of mast and push down.
Mfg by Film Crafts Engineering Co, N.Y.C.
Patent Pending
2427841
                      Telescopic mast, Dichter Morris, Film Crafts
                      Engineering Co, Sept 23, 1947, 403/109.3;
                      248/188.5; 403/329; 403/106; 403/300
2427841 Telescopic mast, Dichter Morris, Film Crafts Engineering Co, Sept 23, 1947, 403/109.3; 248/188.5; 403/329; 403/106; 403/300 -

PRC-17A Rescue Beacon VHF/UHF Transmitter

This is 14-3/4" long so is under the 15" limit for a seat pack.
Photos

Fig 1
PRC-17A Rescue
                      Beacon VHF/UHF Transmitter


A-7 AAF Flashlight, Floating Identification

With any light at sea it's desirable to illuminate as much of the sky as possible.  A light coming from a lamp worn on a person will have half of it's light blocked.  By floating this light some distance from the life raft and the man on board more of the sky is illuminated.

Markings:

When not is use, turn off.  Life of battery approx. 24 hrs., with Mazda 131 (1.3V., 0.10 Amp). 
Check battery periodically. 
To use as flashlight, interchange Mazda #131 with Mazda #112 (1.1V., .22A., TL-3 bulb. 
Life of battery is reduced with #112 Lamp.
Fig 3 Maintenance - Lens unscrews from body.
Remove base cap to replace battery.
Be sure lens and battery cap are screwed tight.
Fig 1 Operation - Turn cap at base to left until battery housing is free.
Extend grip battery housing and turn to left until threads are tight,
Attach end of cord to life raft. 
Light will now float. 
To turn off and to stow reverse above procedure to retract battery housing.
Lamp assembly. Flashlight, Floating Identification.
Type A-7.
Specification No. 32410.
Order No. 43-757541-AF
Property Army Air Forces, U.S. Army
Dayton Acme Co.  - Cincinnati, Ohio -
Patent Appl'd for (see 2366929 below)

Photos

Fig 1
A-7 AAF
                      Flashlight, Floating Identification
Fig 2
A-7 AAF
                      Flashlight, Floating Identification
Fig 3
A-7 AAF
                      Flashlight, Floating Identification
Fig 4
A-7 AAF
                      Flashlight, Floating Identification
Fig 5 No. 112, No. 131 & "2-Cell" LED, all E10 base
The "2-Cell" LED turns on at 0.48V so does work with one cell, just not as bright as with 2-cells.  This is a Joule Thief circuit.
No. 112, No.
                      131 & "2-Cell" LED, all E10 base

Paddle

So far I have not found a nomenclature for this item.
Paddle marked: "In case of night rescue one surface of blade has been reflectorized.  Hold treated side of blade toward search-light to show your location."
The clear wrap packaging is marked: "Film-0-Rap 5500, MIL-B-22191C Type No. 11 Lot No. 1"

Fig 1
One Man
                      Life Raft Paddle
Fig 2
One Man
                      Life Raft Paddle


Patents

RADAR Reflectors
2472782 Wave modifying reflector, Walter J Albersheim, Bel Labs, App: 1945-09-07, Pub: 1949-06-14, 342/6-
3449747 Impact-actuated object locator, Raymond S Daughenbaugh, Charles A Hennessey, Francis M Holmes, Samuel E Lager, 1969-06-10, 342/8; 343/915 - buoy with hemispherical float containing a RADAR corner reflector.

Patent Citations (8)

Publication number Priority date Publication date Assignee Title
US2475633A *1945-01-18 1949-07-12 Henry D Morris Folding corner reflector
US2778010A *1953-08-10 1957-01-15 Claude C Slate & Associates Reflector target
US2885670A *1957-08-08 1959-05-05 Elk Entpr Inc Reflector target
US2888675A *1956-02-07 1959-05-26 Martin Co Water borne inflatable radar reflector unit
US2912687A *1957-11-19 1959-11-10 Leonard Nathaniel Nelson Foldable radar target
US3229291A *1961-01-30 1966-01-11 Aria Paul S Dell Ship simulator
US3229292A *1962-03-06 1966-01-11 Aria Paul S Dell Snorkel simulator
US3326624A *1962-06-22 1967-06-20 Bolkow Gmbh Inflatable mirror construction capable of being formed into a permanently rigid

Cited By (5)

Publication number Priority date Publication date Assignee Title
DE2814088A1 *1978-04-01 1979-10-11 Wilhelm Kloeckner Radar reflector for life saving rafts and boats - has triple mirror of chromium-plated plastics with quarter circle shaped surfaces hinged together and stabilised at edges
US4885591A *1983-09-28 1989-12-05 Mobil Oil Corp. Method and apparatus for monitoring ice masses
FR2701688A1 *1993-02-19 1994-08-26 Corbiere Jerome Device for locating marine anchors and anchors thus equipped.
US5838275A *1996-10-03 1998-11-17 Carmi; Ariel Marine personal locator and automatic opening omnidirectional radar retroreflector incorporated therein
US20160355244A1 *2015-06-02 2016-12-08 Chad  NaughtonRecovery device
3095851 Water marking device, Samuel E Lager, 1963-07-02, 116/211 -
Citations
Publication number Priority date Publication date Assignee Title
US2346325A *1940-07-06 1944-04-11 Oliver Pell Control Ltd Light buoy -CO2 inflated bag + battery powered lamp
US2459267A *1947-07-16 1949-01-18 Aerial Products Inc Self-contained emergency signaling device adapted to be operated automatically after being launched
US2876935A *1958-06-06 1959-03-10 David P Lindberg Criminal apprehension aid

Floating Lights

2355013 Marine safety light, Barnett B Rochestle, 1944-08-01 441/17; 362/158; 200/232; 429/98 - F cell at bottom of long tube
2559918 Marker buoy for air or surface craft, Grieb Benjamin Curtis, App: 1947-02-10, Pub: 1951-07-10 441/10; 116/211; 116/202; 441/17 - released from compartment on plane in water
2296287 Electric water light, Glen W Leyde, App: 1941-01-16, Pub: 1942-09-22 441/16; 362/158; 362/203 - three cells at bottom of long tube, air at top.

2366929
                      Floating signal light, Melvin P Pfeil, (not
                      assigned to Dayton Acme Co), App: 1942-10-31, Pub:
                      1945-01-09, 441/16; 340/321; 429/96; 362/158;
                      439/32 -


2366929 Floating signal light, Melvin P Pfeil, (not assigned to Dayton Acme Co), App: 1942-10-31, Pub: 1945-01-09,
441/16; 340/321; 429/96; 362/158; 439/32 -

Cited by:

Publication number  Priority date  Publication date  Assignee  Title
US2451107A *1945-03-09  1948-10-12  Ira E Mccabe  Electric switch
US2558870A *1948-10-01  1951-07-03  Michelman Nathan  Marine light unit
US2559918A *1947-02-10  1951-07-10  Air Shields  Marker buoy for air or surface craft
US3038076A *1954-02-15  1962-06-05  Pgac Dev Company  Radioactivity well logging calibrating system
US3233093A *1963-09-25  1966-02-01  Matthew E Gerlat  Processional candle
US3292172A *1963-04-13  1966-12-13  Horino Masao  Watertight signal lamp
US3443085A *1967-04-06  1969-05-06  Dietz Co R E  Buoy light
US3628006A *1969-12-19  1971-12-14  Tideland Signal Corp  Signal lantern
US4669990A *1984-07-30  1987-06-02  Mcdermott Kevin  Signal device
US4763126A *1986-11-04  1988-08-09  Ira Jawetz  Mooring location system
US5295882A *1991-07-08  1994-03-22  Mcdermott Kevin  Marine signal device
US20150092402A1 *2013-10-01  2015-04-02  Susan Waldrop  Method and Apparatus for Locating a Mooring Beacon
US9902475B2 *2013-05-082018-02-27  Susan Waldrop  Methods, systems, and devices for managing mooring sites

2381520 Electric torch which floats lamp uppermost in water, Saunders Charles Wallace , General Electric Co, 441/16; 362/186; 362/158; 362/206

Related

CRT-1 Sonobuoy
CRT-3 Gibson Girl  emergency beacon transmitter used on life boats.
Flashlights
Survival radios
Survival Kit
SDU-5/E
SDU-30

References

Ref 1. One-Man Pneumatic Life Raft Survival Kits of World War II, R.S. McCarter & D. Taggart, 2006 -
Ref 2. Naval Ships' Technical Manual, Chapter 583, Boats and Small Craft - as of 1998 the Navy only had 4 and 26 person life rafts.
Ref 3. US Army in W.W.II, The Signal Corps: The Emergency (To December 1941), 1956, Lib of Cong Cat No. 56-60002

Links

PRC68, Alphanumeric Index of Web pages, Contact, Products for Sale
Page Created 2019 August 28