US3167069A

US3167069A - Easily donned flying helmet

Info

Publication number: US3167069A
Application number: US178812A
Authority: US
Inventors: Lobelle Marcel Jules Odilon
Original assignee: ML Aviation Ltd
Current assignee: ML Aviation Ltd
Priority date: 1961-03-14
Filing date: 1962-03-12
Publication date: 1965-01-26
Anticipated expiration: 1982-01-26
Also published as: BE615078A; GB1005187A

Description

Jan. 26, 1965 M. J. o. LOBELLE EASILY DONNED FLYING HELMET 3 Sheets-Sheet 1 Filed March 12, 1962 lnuemfor fim Z B Mea Attorneys Jan. 26, 1965 M. J. o. LOBELLE 3,167,069

EASILY DONNED FLYING HELMET Filed March 12, 1962 3 Sheets-Sheet 2 gi gmzrv ttorneya" Jan. 26, 1965 M. J. o. LOBELLE 3,167,069

EASILY DONNED FLYING HELMET Filed March 12, 1962 5 Sheets-Sheet 5 Inventor United States Patent Office 3,167,669 Patented Jan. 26, 1965 3,167,069 EASILY DONNED FLYlNG HELMET Marcel Jules Odilon Lobelle, Slough, England, assignor to M.L. Aviation Company Limited, Slough, Buckinghamshire, England, a British company Filed Mar. 12, 1962, Ser. No. 178,312 Claims priority, application Great Britain, Mar. 14, 1951, 9,315/ 61 6 Claims. (Cl. 128-141) This invention relates to flying helmets particularly those of the fully pressurized type as disclosed in our co-pending application Serial No. 178,844, filed March 12, 1962. Such helmets when used in conjunction with fully pressurized suits allow the wearer to continue normal flight even after sudden cockpit decompression, for example, after breakage of the canopy at high altitude.

Helmets of this sort are provided with visors for sealing an opening in the front of the helmet to make it pressure tight and also with the usual equipment such as oxygen masks, and ear-buns which are acoustically connected to the radio equipment of the aircraft. All this equipment within the helmet means that care is needed when putting it on so that this is essentially a fairly time consuming operation. Under circumstances in which it is essential for the aircraft to leave the ground as quickly as possible it will be a help if the pilot is able to put his helmet on quickly and easily.

According to the present invention the oxygen mask and ear buns are mounted within the pressure helmet so that they are biased outwardly from the center of the helmet and are connected to control means outside the helmet so that they may be moved into position against the head of a person when the helmet is properly fitted onto the person.

The wearer can put a helmet according to the invention on like a hat, since the oxygen mask and ear-buns are held away from his face, and when the helmet is properly secured to the suit, can draw the mask into position over his mouth, and the buns onto his ears, merely by operating easily accessible control means outside the helmet. It will thus be seen that a helmet according to the invention can be put on much more quickly than those in which the oxygen mask and ear-buns are fixed.

Tensioning of the mask and ear-buns against the face also has further advantages. The oxygen pressure within the mask is usually greater than the pressure outside it so thatby so tensioning the mask the possibility of leakage of oxygen from the mask is much less. When the visor of the helmet is open, the round insulation of the wearers head is of course reduced and then the tensioning of the ear-buns against the wearers head will tend to olfset the effect of this and insulate his ears to sound other than from the earphones within the buns.

The wearer must be free to turn his headand this usually means turning the helmet as well. The movement could be transmitted through the oxygen mask and earbuns but there is a danger of displacing them, and therefore helmets are usually fitted with a pair of pads which fitover the wearers temples to transmit this movement. In a helmet according to the invention normally mounted temple pads would impede the ease with which the helmet is fitted, so that preferably the temple pads too are mounted so as to .be outwardly tensioned, and have control means for moving them into position. The same may apply to a pad which, when the helmet is being worn is in contact with the back of the wearers head.

Preferably the oxygen. mask and ear-buns are adjusted by a first common control member and the temple pads -and.back pad by a second common control member although it is possibleto provide four separate control members, 01' one COIXIIIIOII 0116.

The advantage of separate control is that when the visor of the helmet is open the oxygen mask and ear-buns should be pressed against the wearers head more tightly than when its is closed, whereas the temple pads need to be pressed more tightly against the head when the visor is closed and the helmet pressurized since the resistance to turning the helmet is greater under those conditions.

A helmet according to the invention will now be described in more detail by way of example with reference to the accompanying drawings in which:

FIGURE 1 is a schematic side elevation partly in section of the helmet when being worn;

FIGURE 2 is a schematic plan view partly in section and showing parts of the helmet; and

FIGURE 3 is a view similar to FIGURE 2 but showing different parts of the helmet.

In considering the drawings it should be noted that a combination of FIGURES 2 and 3 represents a plan view of the helmet as shown in FIGURE 1. The mountings and controls for the oxygen mask and the ear-buns are shown in FIGURE 2 while those for the temple pad and back pad are shown in FIGURE 3 and the drawings have been prepared in this way purely for clarity of illustration and description.

In all of the drawings those parts of the helmet not directly concerned with the invention are shown in broken lines and as will be seen from the figures the helmet comprises an outer shell 1 having an opening 2 in the front and provided with a visor 3 for closing this opening when pressurization is necessary. The lower edge 4 of the visor moves into contact with a ledge formed. on a forward projection 5 of the lower part of the shell and this ledge is equipped with a sealing ring (not shown) which the lower edge of the visor comes into contact with. When not in use the visor can be pivoted upwardly and stored in a space 6 at the top of the helmet formed between the shell 1 and an inner partition 7 Although details are not shown the helmet is fitted with means for locking and sealing it to a fully pressurized flying suit and this locking means is preferably as described in copending application Serial No. 178,843, filed March 12, 1962.

The shell is formed with a rigid projection, not shown in detail, in front of the wearers mouth and fixed to this projection is an oxygen mask 8. The actual details of construction of the mask with its inlets and outlets and of the projection are not shown and it is sufficient to know that the mask is connected to the projection by a flexible neck 9. This neck is of such a length in its relaxed condition that the oxygen mask is held forward of the position in which is is shown in FIGURE 1 and in addition the body of the mask is formed of a resilient material which tends to stand away from the face of the wearer. The neck passes through a hole 10 in a resilient pad 11 which passes round the outside of the oxygen mask in the region of the wearers mouth. Each end of the pad is forked and the upper and

lower forks

12 and 13 on the left-hand side of the mask are connected respectively to two cords 14 and 15 joined together at 16. The lower fork 17 on the right-hand side of the mask is connected to a similar cord 18 and a further cord 19 leads to the upper of the two forks on the right-hand side. The

cords

18 and 19 are joined together at 20 in a similar manner to the joint 16.

The helmet is provided with a pair of ear-

buns

21 and 22 which, as shown in the drawings, are pressed against the wearers ears when the helmet'is being worn. Each ear-bun has a pair of spring arms such as 23 and 24 fixed to it by means of a clamping bar 25. Thesearms are fixed at 26 in the crown of the helmet and are such that when in their relaxed position the ear-buns are held at a greater distance from the center of the helmet than that shown in the drawings. Cm the outside of each ear-bun there is a

guide

27 and 28 respectively and a further cord 29 is joined to the cords l4 and at 16 and passes through the guide 27 while a cord 3% is joined to cords l8 and 19 at 2% passes through the guide 28. The cord 29 continues from the rear of the guide to an eyelet 31 fixed to the inside of the back of the shell of the helmet and also through a further eyelet 32, fixed in a similar position on the other side of the helmet. The cord 39 when leaving the rear end of the guide 23 also passes through the eyelet 32 and the two cords 2% and 3t) are joined at 33 to a further cord 34. The cord 54 passes through an eyelet 35 fixed on the inside of the shell at the right-hand side of the helmet and is anchored at its end to a capstan 36. The capstan is carried on the inner end of a shaft 37 which is journalled in a bearing housed in the shell of the helmet. This shaft is surrounded by a sealing ring where it passes through the shell so that when the helmet is pressurized there will be no leakage of internal air. At

7 its outer end the shaft 37 carries a gear wheel 38 which meshes with teeth formed on a section 39 within a hand Wheel 41 mounted on a further shaft 4i) also journalled for rotation in the shell of the helmet. The hand wheel has projections 42 so that it can easily be gripped by the wearer of the helmet. wheel 41 is turned in an anti-clockwise direction as seen from the right-hand side of the helmet the cord 3-4- will be wound on the capstan so. When this is done both cords Z9 and 30 will be drawn towards the rear of the helmet and will act on the outside of the ear-buns 21!. and a 22 to force them towards the head of the wearer. They will also act through the

cords

1d, 15, 18 and 19 on both sides of the resilient pad 11 and thus will force the parts of the body of the oxygen mask against the face of the wearer'and will stretch the neck 9 so that the oxygen mask as a whole is pulled towards the center of the helmet and thus into closer contact with the face of the wearer. Only a light bias is needed for both the ear-buns and the oxygen mask and the friction in the gear 38 and sector 39 and the respective axes is found to be such that they can hold the buns and the mask in the position shown in the drawings without a positive lock. The lock can, however, be provided if it is thought necessary.

As shown in FIGURES 1 and 3 the helmet is equipped with a pair of

pads

43 and 44 fitting over the temples of the wearer. Each of these pads is mounted on the end of two leaf springs 45 which are fixed within the partition 7 at 46 similarly to the

spring arms

23 and 24.. The leaf springs are biased away from the center of the helmet so that when the helmet is not being worn the pads are in a position nearer the shell then the position in which they are shown in FIGURE 3.

At the back of the helmet there is a further pad 47 for pressing against the back of the wearers head and this pad is mounted on two leaf springs 43 and 49 which act to bias it to a position nearer the back of the helmet than the position in which it is shown in the drawings. A webbing harness made up of three straps 5d, 51 and 52 pass around the back of the pad 4 7 and are joined to a ring 53 at the left-hand side of the helmet and a ring 54 at the right-hand side of the helmet. An inelastic cord 54 is fixed atone end to the ring 53, passes through

further rings

55, 56, 57, 58 and 59 and is fixed at its other end to the ring 54. The ring 55 is freely suspended from the crown of the helmet by a piece of webbing so which is fixed at both ends to the inside of the partition 7.

Alternatively this ring could be attached directly to the partition. The

rings

57, 58 and 59 are fixed to the inside of this partition. The cord 54 also passes over rubbing pads 61 and 62 formed on the outer surfaces of the

temple pads

43 and 44 respectively. A further cord 63 is fixed at one end to the ring 56, passes through

rings

64 and 65 fixed on the inside of the partition '7 and is anchored at its other end to a capstan 66 similar to the capstan 36 but positioned on the opposite side of the It will be seen that when the hand helmet. The capstan 66 is connected through gear 72 and sector 73 similar to gear 38 and sector 39 to a hand wheel 67 so that when the hand Wheel 67 is rotated in an anticlockwise direction as is seen from the left-hand side of the helmet, is. in the view shown in FIGURE 1, the cord 63 is Wound onto the capstan so pulling the ring 56 down and drawing the rings and 5 5 forwards so the back pad 47 is pressed into contact with the back of the wearers head and also bearing on the rubbing pads 61 and 62 to force the temple pads into contact with the wearers.

temples. As with the arrangement for controlling the positioning of the oxygen mask and ear-buns the friction should be enough to hold the back pad and temple pads in the said position although again a lock can be fitted if required.

It will be noted that the helmet in also provided with a pad 3 for fitting over the top of the wearers head and that this pad is resiliently mounted within the partition 7 by leaf springs 65*, "iii and 71. No controls are needed for moving this pad, however, since it does not impede the putting on of the helmet. In fact, the top pads are designed for individual wearers and are then fixed inside the top of the helmet. As an alternative to the pad 63 a webbing harness could be fitted within the crown of the helmet, and in fact all that is needed is that the wearers head is kept out of contact with the rigid partition.

It is obvious that modification can be made in the positioning and arrangement of the various cords and in the means used for tensioning the various members outwardly from the center of the helmet. It is also possible to modify the control means and in an alternative form of this the hand wheel can be replaced by a rack and pinion arrangement so that control can be efiected by sliding a knob backwards and forwards and in this case the knob can be fitted with a pawl engaging a rack so that when.

all the members have been pulled to their required positions against the head of the wearer the knob is locked in position.

In addition the arrangement of the back pad 47 can take a number of different forms. For example it need not cover as great an area of the head as does the pad 47 but may merely be an arcuate pad fitting against the nape of the neck. This pad may be mounted on the end of arms hinge-d within the partition and spring biased at their hinges so that the pad lies against the partition. In this case the cords 54 may pass through guides in the pad from the top to the bottom of the pad and be anchored to the partition at their free ends, correspondingto the ends fixed to the

rings

53 and 54.

I claim:

1. A flying helmet comprising: an outer rigid shell;

an oxygen mask; resilient mounting means mounting said oxygen mask within said shell and biasing said oxygen mask outwardly from the center of said shell; two carbuns mounted one on each side of saidvshell; spring-arm means associated with each said earbun, each spring-arm means having a first end'fixcd in the top of said shell and a second end carrying said associated earbun, and each of said spring-arm means having a relaxed position in which said earbuns are a greater distance from said center of said shell than they are required to be when the helmet is worn; a first control means outside said shell; first connecting means connecting said oxygen mask and each said earbun to said first control means, said first control means being actuable to move said oxygen mask and each said earbun towards said center of said shell against said resilient mounting means and said springarm means respectively; two pads for fitting the temples of a wearer of said helmet, one pad on each sideof said shell; leaf spring means associated with each 'of said pads, each leaf spring means having a first end fixed within said shell and a second end carrying said respective pad, said lead spring means biasing said pads outwardly from said center of said shell; a back pad for fitting the back of the head of a wearer of said helmet; resilient biasing means i mounting said back pad within said shell and biasing said back pad away from the center of said shell; a second control means outside said shell; second connecting means connecting said pads and said back pad to said second control means, said second control means being actuable to move said pads and said back pad towards said center of said shell against said leaf spring means and said resilient biasing means respectively.

, 2. A flying helmet as claimed in claim 1, wherein said first control means is mounted at one side of said shell and said second control means is mounted at the opposite side of said shell.

3. A flying helmet as claimed in claim 1, wherein said resilient mounting means for said oxygen mask comprises a flexible neck of arelaxed length such that said mask is biased to a greater distance from said center or" said shell than the required distance when said mask is being worn.

4. A flying helmet as claimed in claim 1, wherein said first connecting means comprises: first and second cords, each associated with one side of said helmet; means fixing a first end of each of said cords to the respective sides of said oxygen mask; guide means for one of said cords on the outside of each said earbun; and means fixing a second end of each of said cords to said first control means.

5. A flying helmet as claimed in claim 1, wherein said second connecting means comprises: third and fourth cords; means fastening a first end of said third cord to one side of said back pad; rneans fastening a second end of said third cord to the other side of back pad; guide means on each said temple pad over which said third cord passes; means fastening a first end of said fourth cord to said third cord at a point intermediate its ends; and means fastening a second end of said fourth cord to said second control means.

6. A flying helmet as claimed in claim 1, wherein at least one of said first and second control means comprises: a hand wheel outside said shell; a shaft passing through said shell; means gearing said shaft to said hand wheel; a capstan fixed on said shaft within said shell; and means on said capstan for anchoring thereto said respective connecting means.

References Cited by the Examiner UNITED STATES PATENTS 2,739,310 3/56 Frieder et a1 23 2,742,039 4/56 Bloom 128-141 3,028,602 4/62 Miller 26 RZCHARD A. GAUDET, Primary Examiner. JORDAN FRANKLIN, Examiner.

Claims

1. A FLYING HELMENT COMPRISING: AN OUTER RIGID SHELL; AN OXYGEN MASK; RESILIENT MOUNTING MEANS MOUNTING SAID OXYGEN MASK WITHIN SAID SHELL AND BIASING SAID OXYGEN MASK OUTWARDLY FROM THE CENTER OF SAID SHELL; TWO EARBUNS MOUNTED ONE ON EACH SIDE OF SAID SHELL; SPRING-ARM MEANS ASSOCIATED WITH EACH SAID EARBUN, EACH SPRING-ARM MEANS HAVING A FIRST END FIXED IN THE TOP OF SAID SHELL AND A SECOND END CARRYING SAID ASSOCIATED EARBUN, AND EACH OF SAID SPRING-ARM MEANS HAVING A RELAXED POSITION IN WHICH SAID EARBUNS ARE A GREATER DISTANCE FROM SAID CENTER OF SAID SHELL THAN THEY AR REQUIRED TO BE WHEN THE HELMET IS WORN; A FIRST CONTROL MEANS OUTSIDE SAID SHELL; FIRST CONNECTING MEANS CONNECTING SAID OXYGEN MASK AND EACH SAID EARBUN TO SAID FIRST CONTROL MEANS, SAID FIRST CONTROL MEANS BEING ACTUABLE TO MOVE SAID OXYGEN MASK AND EACH SAID EARBUN TOWARDS SAID CENTER OF SAID SHELL AGAINST SAID RESILIENT MOUNTING MEANS AND SAID SPRINGARM MEANS RESPECTIVELY; TWO PADS FOR FITTING THE TEMPLES OF A WEARER OF SAID HELMENT, ONE PAD ON EACH SIDE OF SAID SHELL; LEAF SPRING MEANS ASSOCIATED WITH EACH OF SAID PADS, EACH LEAF SPRING MEANS HAVING A FIRST END FIXED WITHIN SAID SHELL AND A SECOND END CARRYING SAID RESPECTIVE PAD, SAID LEAD SPRING MEANS BIASING SAID PADS OUTWARDLY FROM SAID CENTER OF SAID SHELL; A BACK PAD FOR FITTING THE BACK OF THE HEAD OF A WEARER OF SAID HELMET; RESILIENT BIASING MEANS MOUNTING SAID BACK PAD WITHIN SAID SHELL AND BIASING SAID BACK PAD AWAY FROM THE CENTER OF SAID SHELL; A SECOND CONTROL MEANS OUTSIDE SAID SHELL; SECOND CONNECTING MEANS CONNECTING SAID PADS AND SAID BACK PAD TO SAID SECOND CONTROL MEANS, SAID SECOND CONTROL MEANS BEING ACTUABLE TO MOVE SAID PADS AND SAID BACK PAD TOWARDS SAID CENTER OF SAID SHELL AGAINST SAID LEAF SPRING MEANS AND SAID RESILIENT BIASING MEANS RESPECTIVELY.