Патент USA US2404029код для вставки
July 16,‘ 1946.‘ P. M. BIIRK _ 2,404,029 TORQUE WRENCH Filed May a, 1944 FIG.2 \fy (20 20 FIG. 3 /,8/,9 INVENTOR. PAUL M. BIRK BY ATTORNEY Patentecl July 16, 1946 2,404,029 UNITED STATES PATENT OFFICE 2,404,029 TORQUE WRENCH Paul M. Birk, Kenmore, N. Y., assignor to Curtiss Wright Corporation, a corporation of Dela ware Application May 6, 1944, Serial No. 534,476 6 Claims. ( Cl. 73-139) 1 This invention relates to improvements in torque measuring and indicating wrenches, and more particularly the invention is concerned with a wrench of the type characterized by a resilient beam by which the torsional forces are trans mitted to the part to be turned, the de?ection of the said beam varying directly as the magni tude of such forces and hence being readily trans 2 working stroke of the wrench is utilized to meas ure and indicate the magnitude of the forces act ing upon the part to which such forces are transmitted. To this end a U-shaped element I6 is carried by the head I I. The terminal portions of the legs of the said element carry screws I‘! which provide pivots for indicators l8, the latter being located at opposite sides of the beam ID. latable into appropriate force units. Although The indicators overlie similar arms l9 which are not necessarily limited to such use, the wrench 10 ?xed to opposite sides of the handle l2. The may be employed to particular advantage for said arms are supported by the handle preferably winding the spring actuators which are associated in spaced relation with respect to the beam and with the shell feeding mechanisms of aircraft can the respective indicators and terminate at their non and for indicating when such actuators have inner ends in the vicinity of the head I I. Oppo been wound to the proper degree. 15 sitely extending studs 20, which are carried at One object of the invention is to provide a the inner ends of the arms l9, occupy elongated wrench which is compact and of light-weight con slots 2| which are formed in the indicators N3, struction and which may be manipulated in con the outer ends of the arms l9 carrying lateral ?ned areas and stored in a minimum of space. extensions 22. The latter bear suitably gradu A further object is a wrench wherein provision 20 ated scales 23 with which the indicators coop is made for amplifying the de?ection of the beam crate. in such a manner that, although a short, rela It will be apparent that in the use of the wrench tively stiif beam may be employed, the magnitude the beam ID will be de?ected more or less depend of the forces acting upon the part being turned ing upon the force being applied to the handle will be clearly and accurately indicated. 25 12 and that such de?ection will be accompanied A still further object is to provide a wrench by a corresponding de?ection of the free ends of which may be availed of to apply turning forces the arms 19 in an opposite direction. As such to a part either in a clockwise or a counterclock movement of the outer ends of the arms I9 is wise direction and which will measure and indi transmitted to the indicators I8 by the studs 20, cate the magnitude of such forces in either direc 30 the indicators will traverse the scales 23 to indi tion. cate the value of the torsional forces acting upon The invention is illustrated in the accompany the part being turned and thereby indicate ing drawing in which: whether and to what extent such turning should Figure 1 is a top plan view of a wrench em be continued. bodying the features of the invention. 35 It will be noted that the magnitude of the Figure 2 is a side elevational view of the wrench. de?ection of the indicators with respect to the Figure 3 is a longitudinal section taken along deflection of the beam depends not only upon line 3-3 of Figure 2. the resiliency of the beam but also upon the Figure 4 is a detail sectional view taken along length of the arms l9 and the points at which line 4—-4 of Figure 1. 40 the arms are connected to the indicators. The Figure 5 is a transverse section taken along construction described, therefore, has the advan line 5—5 of Figure 1. tage that the de?ection of the beam may, within The wrench, as illustrated, includes a resilient limits, be ampli?ed to any desired degree. Hence, beam l0, one end of which carries a head H and a relatively stiff beam may be employed, when the other end of which carries a handle l2. The 45 for any reason this is desired, it being only nec wrench being of the ratchet type, the head ll essary in such case to increase the ampli?cation carries a socket l3 in which a terminal portion of the beam de?ection to obtain the desired accu of the part to be turned is adapted to be accom racy of measurement and indication. The use of modated. A spring-loaded pawl l4 (Figure 4) dual indicators in the manner described has the is engageable with teeth I5 on the socket in such 50 advantage that the wrench may be availed of to a manner that a movement of the beam ID with equal advantage in turning parts either in a clock respect to the socket is permitted in one direc wise or counterclockwise direction. This is ef tion but prevented in the other. fected by merely reversing the position of the In accordance with the invention the magni wrench, so that one of the indicators 22 lies tude of the de?ection of the beam l0 during a 55 uppermost for clockwise turning and the oppo n]. 2,404,029 4 3 site indicator 22 lies uppermost for counterclock wise turning. It is to be understood that any reference to the use of the wrench in connection with the winding of the spring actuators of shell feeding mechanisms is intended by way of example only, being noted particularly because of the special adaptability of the .wrench for uses wherein the space in which the wrench must be manipulated direction and to prevent pivotal movement of said beam with respect to said head in the op posite direction, a handle at the outer end of said beam, a pair of indicators, a pair of pivots carried by said head, each said pivot carrying one of said indicators, a pair of actuating arms ?xed to said handle at one end, and a pair of slot and pin actuating connections between the inner ends of said actuating arms and said indicators in is limited or the small size and light weight of _ 10 the vicinity of said pivots. the wrench may be of importance. Obviously ' ' 4. In a torque measuring wrench, the combi nation of a head which is engageable with a part to be turned, a resilient beam connected to said head and which is de?ected by the force applied 15 to‘ it in turning ‘said part, a handle at the outer I claim as my invention: end of said beam, an indicator, an actuating con 1. In a torque measuring wrench, the combi~ nection between said indicator and said head, an nation of a head which is engageable with a part actuating arm ?xed at its outer end to said han to be turned, a resilient beam connected to said dle, and-an actuating connection between said head and which is de?ected by the force applied to it in turning said part, a handle at the outer 20 indicator and the inner end of said arm in the vicinity of the ?rst mentioned actuating connec end of said beam, an indicator, a pivot for said tion, one of said actuating connections being a indicator carried by said head, an actuating arm pivot connection and the other a pin and slot ?xed at its outer end to said handle, and a slot connection. and pin connection between said indicator and 5. In a torque measuring wrench, the combi the inner end of said arm in the vicinity of said 2.5 the wrench may be employed to equal advantage > for other purposes wherein the factors of size and. weight may not be so important. nation of a head which is engageable with a part to be turned, a resilient beam connected to said 2. In a torque measuring wrench, the combi head and which is deflected by the force applied nation of a head which is engageable with a part to it in turning said part, a handle at the outer to be turned, a resilient beam connected to said end of said beam, a pair of indicatorsya pivot .30 head and which is de?ected by the force applied connection between each indicator and the head, to it in turning said part, a handle at the outer an actuating arm for each indicator ?xed at its end of said beam, a U-shaped element ?xed to outer end to said handle and having a graduated said head and carrying pivots at the opposite lateral extension which the indicator may trav sides of the latter, indicators connected to said erse, and. an actuating connection between the head by said pivots, slots formed in said indi .35 inner end of each arm and its indicator in the pivot. cators in the vicinity of said pivots, arms which said indicators overlie, which at their outer ends vicinity of said pivot. ' 6. In a torque measuring wrench, the combi are ?xed to said handle and which at such ends nation of a head which is engageable with a are formed with graduated lateral extensions 40 part to be turned, a resilient beam connected to which said indicators may traverse, and studs said head and which is de?ected by the force carried at the inner ends of said arms and ac applied to it in turning said part, a handle at the commodated in said slots. outer end of said beam, a pair of indicators, a ' " 3. In a torque measuring wrench, the combi pivot connection between each indicator and the nation of a head which is engageable with a part head, an actuating arm for each indicator ?xed to be turned, a resilient beam pivotally conat its outer end to said handle and having a grad‘ nected to said head and which is de?ected by the uated lateral extension which the indicator may force applied to it in turning said part, a ratchet and pawl connection between said beam and said head arranged to permit free pivotal movement of said beam with respect to said head in one traverse, and a pin and slot connection‘between the-inner end of .each arm and its indicator in the vicinity of said pivot. PAUL M. BIRK.